danc thay thiep

8/3/2019 DANC thay thiep

1/43

n mn hc

trang 1

SVTH:

CHNG 1M u

1.1 t vn Chnh sch mca ca ng v chnh ph mang li nhng kt qu to ln trongcng cuc xy dng t nc giu mnh. Tc th ha ca t nc ngy cngtng nhanh, i sng ca ngi dn ngy cng c ci thin. mt th mun phttrin nhanh chng th c s h tng phi i trc mt bc. nc cp, mt trongnhng yu t ca c sh tng, mt phn tt yu ca cuc sng cng phi c quyhoch trc nhm t nn tng cng chc cho s pht trin th.Kinh t ngy cng pht trin, mc sng ca ngi dn ngy cng c ci thin th

nhu cu cp nc ngy cng cao, c v s lng ln cht lng. iu i hi hthng cp nc phi khng ngng c nng cp v mrng, phc v ngy cng tthn nhu cu ca ngi dn.Gp phn vo vic nng cao mt phn cht lng cuc sng cho ngi dn, ti chnti thit k trm xl nc cp cho th x b ra thuc tnh B RaVng Tu.

1.2 Mc ch ca nNhm m bo cung cp ngun nc sch cho ngi dn v nhu cu s dng, snxut, sinh hot ca ngi dn trong khu vc, n thc hin nhn mc ch sau:

Tnh ton thit k trm s l nc cho th x B Ra tnh B Ra-Vng Tu t hthng sng Dinh. m bo p ng nhu cu ca ngi dn ti nm 2020.a chn phng n ti u xy dng trm x l nc cp t tiu chun cp ncsch cho th x.

1.3 i tng nghin cua) Nc ngmc khai thc t cc tng cha nc di t, cht lng nc ngm ph thuc vothnh phn khong ha v cu trc a tng m nc thm qua. Do vy nc chy qua

cc a tng cha ct v granit thng c tnh axit v cha t cht khong. Khi ncngm chy qua a tng cha vi th nc thng c cng v kimhydratcacbon kh cao. Ngoi ra c trng ca nc ngm l:c thp.Nhit v thnh phn ha hc tng i n nh.Khng c oxy nhng c th cha nhiu kh nh: CO2,H2SCha nhiu khong cht ha tan ch yu l st, mangan, canxi, magie, floKhng c hin din ca vi sinh vt.

n tn v nun n ngm ti th x B Ra


2/43

n mn hc

trang 2

SVTH:

Mt s ti liu khoan v thm d trong th x b ra cho thy:Nc ngm mch nng cht lng nc tng i tt. ang c nhn dn trongvng s dng (bng ging o hay ging khoan) phc v cho nhng mc ch sinhhot.

Cht lng nc: cha tt

(Hin ngun nc BR-VT ang chu hu qu t cht thi cng nghip, sinh hotcha qua x l ca cc c scng nghip tnh ng Nai, thnh ph H Ch Minhthi xung cc sng Th Vi, Ci Mp, nhng ch yu vn do chnh cc c ssn xutv ngi dn trn a bn. L tnh c thu nhp GDP vo loi cao nht nc, tc pht trin kinh t v xy dng c sh tng nhanh, nhng ti nay cha c mt khu th no xy dng h thng thu gom, xl nc thi sinh hot, tt cu chy trn lantrn mt t, chy vo cc tuyn thot nc ma ri ra knh rch, sng sui, ha

vo nc mt, thm xung nc ngm. l li cnh bo ca STi nguyn v Mitrng v cc ngnh hu quan).

Trlng: v l nc ngm mch nng nn trlng t, ch thun li cho vic khaithc vi qui m nh l phc v cho cc hgia nh. Khng lu lng khai thcquy m cng nghip.

Nc ngm tng su c nhng cng c tr lng t.V vy nc ngm khng th l ngun cung cp nc chnh cho Th X,v cht lngnc ngm khng m bo ch dng nc ngm khi ngun nc mt cung cp khng

mang tnh b sung).b) Nc mtBao gm cc ngun nc trong cc ao, m,h cha, sng sui. do kt hp t dngchy trn b mt v thng xuyn tip xc vi khng kh nn cc c trng ca ncmt l:Cha kh ha tan c bit l oxy.Cha nhiu cht rn l lng, ring trng hp nc cha trong cc ao m, h do xyra qu trnh lng cn nn cht rn l lng cn li trong nc c nng tng i

thp v ch yu dng keo.C hm lng cht hu c cao.C hin din ca nhiu loi to.Cha nhiu vi sinh vt.n tn v nun n mt t t r

Sng Dinh bt ngun t h Kim Long, x Kim Long, huyn Chu c, chy theohng bc nam, trn ng c cc con sui t cc huyn Tn Thnh, Chu c vo. Sng chy qua th x B Ra v ra vnh Gnh Ri ti thnh phVng Tu.

Phlu gm cc sui Chu Pha, en, Sui Non, Sui Ngh, Sui Cu cho tng


3/43

n mn hc

trang 3

SVTH:

Sng c chiu di khong 40km, on thng ngun lm ranh gii t nhin gia haihuyn Tn Thnh v Chu c, on h ngun ti thnh phVng Tu, lng sng

rng ti hn 20 m, su t4 n 6 m, thch hp cho vic khai thc giao thng thuv pht trin cng, c nhiu cng bin hot ng. u im ca sng Dinh l bn nhttriu (mt ngy thu triu ln xung 2 ln), bin thy triu ti 3,5 m, rt tt chovic khai thc lung c ban ngy ln ban m.

Hin trn ton tuyn sng Dinh c 18 cng, gm 9 cng bin, 9 cng thy ni a,cng c, cng qun s. Trong 9 cng bin, c 4 cng c Cc Hng hi cng bcho php tip nhn tu c trng ti n 10.000 DWT, l cc cng: Vietsopetro,cng Hlu PTSC, cng xng du PTSC v cng kho xng du ng Xuyn.

1.4 Phm vi nghin cuNgun nc ngm v ngun nc mt

Nhng trong cng trnh cp n vn nc mt

1.5 Ni dung nghin cuThu thp s liu v th x: vtr a l, kh hu, iu kin kinh t.Thu thp s liu v cht lng ca ngun nc.Tnh ton nhu cu dng nc ti 2020.

La chn cng ngh x l v tnh ton thit k.V chi tit.Tnh ton kinh ph u t xy dng.Tnh ton chi ph vn hnh.Kt lun

1.6 Phng php nghin cuphng php thu thp s liu, kho st thc t.phng php tng hp, phn tch s liu.

phng php tham kho kin hng dn.phng php so snh, la chn phng n ti u.Phng php phng n thit k.Phng php bn , bn v.

1.7 K hoch thc hinThi gian thc hin: t ngy 05/04/201115/06/2011 c chia lm 8 giai on.1. Hon tn n tt 05/04/2011

lng dng chy bnh qun nm l 238 triu m3.


4/43

n mn hc

trang 4

SVTH:

C qui m cng sutC thnh phn tnh chtC tiu chun ng dng thit kC s cng ngh x l ch

2. Hon thnh ni dung tng quan 15/04/2011Xong tt c cc ni dung tng quan ca bo co n.

3. Tnh ton thit kcng ngh 30/04/2011Tnh xong cc cng trnh trong h thngTnh xong v la chn c thit b cng nghTnh xong cao trnh mt s cng trnh trong cng ngh4. Tnh ton kinh t10/05/2011Chi ph xy dngChi ph thit bChi ph vn hnhChi ph x l trn mt n vV phc tho cng ngh5. Mt bng v mt ct d teo nc 10/05/2011Xong phc tho tng cng trnh, vnt, cha cn trang tr

B tr v tnh xong cao trnh cng nghiu chnh chnh xc thng s thit bv bm la chn V chi tit cng ngh.6. Gio vin sgiao c thbn vchi tit 30/05/2011iu chnh hon thin ton b ni dung tnh toniu chnh xong tt c bn v

Xem li l thuyt cc cng nghng dng v vn hnh cc cng ngh thit k7. Hon tn N 05/05/2011Hon thnh ton b N, CHUN B BO V

8. Bo v n Dkin 1015/06/2011

CHNG 2 GII THI NG QN

2.1Thng tin chung vth x B Ra

Thi Vit Nam Cng ha, th x B Ra v mt hnh chnh ch l cp x Phc ,va l qun l qun Chu Thnh Phc Tuy, va l tnh l tnh Phc Tuy.

Ngy 8-12-1982, th trn B Ra c thnh lp t x Phc , huyn Chu Thnh,tnh ng Nai. Khi th trn B Ra pha ng gip x ong in, huyn ong t,

pha ty gip x ong Hng, pha bc gip x Ha ong, pha nam gip Tim Sng vCu C May thuc c khu Vng Tu-Cn o
http://vi.wikipedia.org/wiki/Vi%E1%BB%87t_Nam_C%E1%BB%99ng_h%C3%B2ahttp://vi.wikipedia.org/wiki/Ph%C6%B0%E1%BB%9Bc_Tuyhttp://vi.wikipedia.org/wiki/Ph%C6%B0%E1%BB%9Bc_Tuyhttp://vi.wikipedia.org/wiki/Ch%C3%A2u_Th%C3%A0nhhttp://vi.wikipedia.org/wiki/Long_%C4%90%E1%BA%A5thttp://vi.wikipedia.org/wiki/Long_%C4%90%E1%BA%A5thttp://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/wiki/Long_%C4%90%E1%BA%A5thttp://vi.wikipedia.org/wiki/Ch%C3%A2u_Th%C3%A0nhhttp://vi.wikipedia.org/wiki/Ph%C6%B0%E1%BB%9Bc_Tuyhttp://vi.wikipedia.org/wiki/Vi%E1%BB%87t_Nam_C%E1%BB%99ng_h%C3%B2a


5/43

n mn hc

trang 5

SVTH:

B Ra l mt th x thuc tnh B Ra - Vng Tu trc kia thuc huyn ChuThnh, tnh ng Nai). Ngy nay, B Ra c th c coi l trung tm hnh chnh mica tnh ny l tnh l), bi l, nhiu c quan, giao dch hnh chnh ca tnh cchuyn t thnh ph Vng Tu v y. Tuy nhin, vn cha c quyt nh no thay

i tnh l cho nn trn danh ngha,Vng Tu vn l tnh l ca tnh B Ra - VngTu.

Th x B Ra c thnh lp t ngy 2 thng 6 nm 1994, do chia huyn Chu Thnhthnh huyn Chu c, Tn Thnh, th x B Ra. Nhiu c quan quan trng ca tnh chuyn t Vng Tu n y, t sau khi th x c nng ln lm tnh l. N ctch ra t huyn Chu Thnh theo ngh nh s 45/CP ngy 2 thng 6 nm 1994 v ivo hot ng t ngy 15 thng 8 nm 1994.

2.2iu kin t nhin2.2.1 V tr a l

Th x B Rac din tcht nhin l 95 km gip ranh vi cc khu vc sau:

CchThnh ph H Ch Minh90 km v pha ng Nam.

CchVng Tu20 km v hng ng Bc.

Pha bc th x gip huyn Chu cv mt phn huynTn Thnh.

Pha nam gip thnh ph Vng Tu.

Pha ng gip huyn ong in v t .

Pha ty gip huyn Tn Thnh.

Gm 8 phng:Phc Hng,Phc Hip,Phc Trung,Phc Nguyn,LongHng,Long Ton,Kim Dinh,Long Tm v 3 x:Ha Long,ong Phc,Tn Hng.

Theo nh nh hng pht trin th n 2012 th x B Ra s tr thnh thnh ph BRa. Nm 2020 s phn u thnh th loi II v tr thnh trung tm Hnh Chnh -Chnh Tr- Kinh T quan trng ca tnh B Ra- Vng Tu.

2.2.2 a hnhTh x nm pha ng chn ni Dinh,c a hnh bin i lin tc. Cao ln nht14,50 m v pha ng Bc v Ty Bc th x, cao thp nht 0,5m v pha Namth x, khu vc rung trng gn sng Dinh v sng C May, thp dn t Bc xung

Nam.
http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=%C4%90%E1%BA%B7c_khu_V%C5%A9ng_T%C3%A0u-C%C3%B4n_%C4%90%E1%BA%A3o&action=edit&redlink=1http://vi.wikipedia.org/wiki/Th%C3%A0nh_ph%E1%BB%91_H%E1%BB%93_Ch%C3%AD_Minhhttp://vi.wikipedia.org/wiki/Th%C3%A0nh_ph%E1%BB%91_H%E1%BB%93_Ch%C3%AD_Minhhttp://vi.wikipedia.org/wiki/Th%C3%A0nh_ph%E1%BB%91_H%E1%BB%93_Ch%C3%AD_Minhhttp://vi.wikipedia.org/wiki/V%C5%A9ng_T%C3%A0uhttp://vi.wikipedia.org/wiki/V%C5%A9ng_T%C3%A0uhttp://vi.wikipedia.org/wiki/V%C5%A9ng_T%C3%A0uhttp://vi.wikipedia.org/wiki/Ch%C3%A2u_%C4%90%E1%BB%A9chttp://vi.wikipedia.org/wiki/Ch%C3%A2u_%C4%90%E1%BB%A9chttp://vi.wikipedia.org/wiki/T%C3%A2n_Th%C3%A0nhhttp://vi.wikipedia.org/wiki/T%C3%A2n_Th%C3%A0nhhttp://vi.wikipedia.org/w/index.php?title=Ph%C6%B0%E1%BB%9Bc_H%C6%B0ng&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Ph%C6%B0%E1%BB%9Bc_Hi%E1%BB%87p&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Ph%C6%B0%E1%BB%9Bc_Hi%E1%BB%87p&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Ph%C6%B0%E1%BB%9Bc_Trung&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Ph%C6%B0%E1%BB%9Bc_Trung&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Ph%C6%B0%E1%BB%9Bc_Nguy%C3%AAn&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Ph%C6%B0%E1%BB%9Bc_Nguy%C3%AAn&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Long_H%C6%B0%C6%A1ng&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Long_H%C6%B0%C6%A1ng&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Long_To%C3%A0n&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Kim_Dinh&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Long_T%C3%A2m&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=H%C3%B2a_Long&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Long_Ph%C6%B0%E1%BB%9Bc&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Long_Ph%C6%B0%E1%BB%9Bc&action=edit&redlink=1http://vi.wikipedia.org/wiki/T%C3%A2n_H%C6%B0nghttp://vi.wikipedia.org/wiki/T%C3%A2n_H%C6%B0nghttp://vi.wikipedia.org/wiki/T%C3%A2n_H%C6%B0nghttp://vi.wikipedia.org/wiki/T%C3%A2n_H%C6%B0nghttp://vi.wikipedia.org/w/index.php?title=Long_Ph%C6%B0%E1%BB%9Bc&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=H%C3%B2a_Long&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Long_T%C3%A2m&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Kim_Dinh&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Long_To%C3%A0n&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Long_H%C6%B0%C6%A1ng&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Long_H%C6%B0%C6%A1ng&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Ph%C6%B0%E1%BB%9Bc_Nguy%C3%AAn&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Ph%C6%B0%E1%BB%9Bc_Trung&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Ph%C6%B0%E1%BB%9Bc_Hi%E1%BB%87p&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Ph%C6%B0%E1%BB%9Bc_H%C6%B0ng&action=edit&redlink=1http://vi.wikipedia.org/wiki/T%C3%A2n_Th%C3%A0nhhttp://vi.wikipedia.org/wiki/Ch%C3%A2u_%C4%90%E1%BB%A9chttp://vi.wikipedia.org/wiki/V%C5%A9ng_T%C3%A0uhttp://vi.wikipedia.org/wiki/Th%C3%A0nh_ph%E1%BB%91_H%E1%BB%93_Ch%C3%AD_Minh


6/43

n mn hc

trang 6

SVTH:

t t t lm 3 lo teo trn n :

oi t tng i bng phng, c cao t 3 - 14m . Chim 3/5 din tch th x, hinl t nng nghip v t xy dng chnh ca cc khu vc ni v ngoi th

Trn 1/3 din tch l t thp nm pha Nam Q 55 v Q 51. Khu vc ny chia lm 2loi. Phn gip vi cc trc giao thng c din tch bng 1/3 khu vc hin ang canhtc nng nghip. Phn cn li l vng t thp dn ra b sng, b bin, chu nhhng tc ng ca thu triu, hin ang khai thc dim nghip, nui trng thu snhoc rng.

Phn t cn li pha Ty) c din tch khng ln l ni , 1 phn ca trin ni Dinhdc v li lm .

2.2.3 Kh huTh x nm trong vng kh hu nhit i - i dng v gi ma nng m vi cc ctrng : mt bng nhit m cao , chia 2ma r rt , gi ln nhng khng c bo . Ccyu t c trng kh tng nh sau :

Nt kn k:

Nhit trung bnh hng nm khong 25,8oC.

Nhit ti cao 36,2oC.

Nhit ti thp 16,8oC.

m kn k :

m trung bnh 82%.

m ti cao trung bnh 92%.

m ti thp trung bnh 62%.

Ln m :

ng ma trung bnh hng nm thp khong 1.300mm) v phn b rt khng utheo thi gian.

Su thng ma ma t thng 5 ti thng 11) ma ln tp trung trn 90% lng mahng nm. Thng ma ln nht lng ma t ti 455,3mm.

Su thng ma kh lng ma cha y 10%. C thng hu nh khng ma nh

thng 1 v 2.


7/43

n mn hc

trang 7

SVTH:

Ma ch tp trung vo vi thng trong nm gy ra qu trnh si mn, ra tri t ticc vng dc v to ra mt cn i nc cc b ti mt s vng .

C :

Vo ma ma c gi thnh hnh hng Ty Nam . Ma kh c gi thnh hnhhng ng Bc ; Thi im chuyn tip c gi ng v ng - Nam.

Tc gi trung bnh 2,1m/s.

Tc gi ln nht quan trc c 12,0m/s c hng ng v Ty- Nam.

Th x t b nh hng bo ln nhng c chu nh hng ca p thp nhit i, tnsut bo l 1- 5% 20 nm c 1 trn bo va, 100 nm c mt trn bo ln).

2.2.4 a cht cng trnh v a cht th vnTh x cha c bn nh gi a cht cng trnh. Qua khoan nh gi a cht cho 1s cng trnh xy dng c th thy rng khu vc pha Bc cng chu nn ca tt 1,5- 2,0kg/cm2. Khu vc rng sc pha Nam, a cht cng trnh yu.

Ti th x B Ra c ngun nc ngm c th khai thc ti 20.000m3/ngy su t39 - 48m

2.3 iu kin kinh t - x hiDn s ti th x theo theo thng k ca phng TKTX nm 2010 l 94.768 ngi trong dn s ni thl 67.500 ngi tng ng 71,23%.

Ti th x, mt s hot ng nng nghip nh trngc ph, cao su,iu, cy n qu.Th x l mt u mi giao thng ca cc tuyn quc l l51, 52, 56 v tnh l 52.

T khi thnh lp ti nay, qua 9 nm phn u, th x B Ra t c nhng ktqu kh quan. Tng sn phm ni a ca a phng tng bnh qun hng nm l

22,29%: Ngnh CN- TTCN c 738 c s sn xut, t tc tng trng hng nm25,48%. Ngnh nng nghip t mc tng bnh qun hng nm 7,44%; trn lnh vctrng trt c bn hnh thnh c 3 vng chuyn canh vng la, vng cy n quv cy cng nghip, vng rau). Dch v thng mi cng c bc pht trin ng k,t tc tng trng hng nm t 12-15%. Th x xy dng hon chnh khuTrung tm thng mi v cc ph ch, p ng nhu cu giao lu bun bn trcmt v trong tng lai. Dch v bu chnh vin thng c m rng, hin nay trn a

bn th x trn 6.000 my in thoi, tc pht trin bnh qun hng nm l 23,38%.V xy dng c bn, trong 9 nm qua, th x lm mi, nng cp, ci to c hn90 km ng giao thng, lp t 1.450 b n chiu sng, trng gn 3.000 cy xanh

cc loi lm mi hoa vin, cng vin vi din tch trn 5.500m, 12 cng tnh dch v
http://vi.wikipedia.org/wiki/C%C3%A0_ph%C3%AAhttp://vi.wikipedia.org/wiki/C%C3%A0_ph%C3%AAhttp://vi.wikipedia.org/wiki/Cao_suhttp://vi.wikipedia.org/wiki/%C4%90i%E1%BB%81uhttp://vi.wikipedia.org/wiki/%C4%90i%E1%BB%81uhttp://vi.wikipedia.org/wiki/Qu%E1%BB%91c_l%E1%BB%99_51http://vi.wikipedia.org/wiki/Qu%E1%BB%91c_l%E1%BB%99_51http://vi.wikipedia.org/wiki/Qu%E1%BB%91c_l%E1%BB%99_52http://vi.wikipedia.org/wiki/Qu%E1%BB%91c_l%E1%BB%99_56http://vi.wikipedia.org/wiki/Qu%E1%BB%91c_l%E1%BB%99_56http://vi.wikipedia.org/wiki/Qu%E1%BB%91c_l%E1%BB%99_52http://vi.wikipedia.org/wiki/Qu%E1%BB%91c_l%E1%BB%99_51http://vi.wikipedia.org/wiki/%C4%90i%E1%BB%81uhttp://vi.wikipedia.org/wiki/Cao_suhttp://vi.wikipedia.org/wiki/C%C3%A0_ph%C3%AA


8/43

n mn hc

trang 8

SVTH:

thng mi, 100 cng tnh y t, vn ha, x hi v 15 cng trnh kinh t nng nghip,vi tng vn u t trn 400 t ng.

Th x B Ra cn l mt u mi giao thng bun bn, c ng ng kh t chyqua, c iu kin pht trin thng mi v nhng ngnh cng nghip s dng kh tlm nguyn liu v nhin liu. Hu ht cc tuyn giao thng n tnh B Ra -VngTu u chy qua th x B Ra nh: Quc l 51, 55, 56 hin nay v sau ny l tuynng cao tc Vng Tu thnh ph H Ch Minh, tuyn ng st Vng Tu BinHa, do vy th x c th pht trin dch v vn ti bn xe, bun bn. Pht trin CN TTCN cng l mt hng u tin ca th x. Ti y c Nh my in B Ra chy

bng kh t cng sut khong 327,8 MW, ang trin khai xy dng Nh my inlin doanh Wartsla cng sut 120 MW. Cng vi Ph M, B Ra s l mt trung tmin nng ln ca c nc. B Ra sn xut c gch khng nung, khai thc , snxut b tng, b tng nha ng, c kh xy dng. V hng xut khu, trn a bnth x c mt nh my may giy, mt nh my may ti xch, 2 nh my ng lnh hisn v mt x nghip may xut khu.

Hin nay, tnh ang quy hoch v xy dng h tng k thut trung tm hnh chnh tnhti th x B Ra. Ti y tnh cng ang quy hoch chi tit mt khu cng nghip sng kh thp p vi din tch khong 30 - 40 ha phng ong Hng. Song song s c hng m rng cc ngnh cng nghip s dng kh t, tin hnh u t nhmy nc en, hin i ha nh my ch bin hi sn xut khu, tip tc phttrin cng nghip vt liu xy dng, da giy, c kh, may mc, ch bin thc phm,

pht trin thng mi, khai thc ti a hiu qu ca Trung tm thng mi B Ra...

CHNG 3NH C NG NC

3.1Mc tiu cp nc trong thi k t 21 2020

Mc tiu ra l:

m bo cp nc cho khu vc dn c th x B Ra vi cc yu cu lu lng,ng p lc v t tiu chun v sinh. To tin cho s pht trin ca th x sau ny.

3.2Qu m n

Quy m ca th x c tnh da trn dn s hin ti v nh hng quy hoch tngth v pht trin kinh t x hi th x ra n nm 22

3.3c nh nhu cu ng nc

ng 31 D bo quy m dn s th x B Ra n nm 2015 v nm 2025 nh sau:

n v: 1.000 ni.


9/43

n mn hc

trang 9

SVTH:

Cc giai an (k c dn svng lai quy i)

Dn snm 215 Dn snm 22 Dn snm 225Ni th Ngai th Ni th Ngai th Ni th Ngai th

khang t120.000-135.000

khang t20.000-30.000

khang t

155.000-165.000

khang t

20.000-25.000

khang t180.000-190.000

khang t20.000-25.000

Chim 81-85% dn sth x

Chim 86-88% dns th x

Chim 86-90% dn sth x

ng 3.2 Cc ch tiu kinh t k thut ch yu

STT Hng mcn v Nm tnh

tnh 2015 2020 20251 Dn s ni th Ngi 13.000 145.000 180.0002 Nh :

- Bnh qun din tchsn m2/ngi 15 20 25

- Tng cao trung bnh tng 1,21,4 1,4-1,8 1,52,13 t khu dn dng m2/ngi 80 85

. t

. t cng cng

. t cy xanh v TDTT

. t giao thng

M2/ngi

M2/ngi

M2/ngi

M2/ngi

4550

46

9 -12

1012

50

46

1012

1620

4 Giao thng :

- T lt giao thngtnh n ng lin khuvc phi t thp nht l6%

- Mt ng chnh km/km2 2,0 2,5 3,5

5 Cp nc


10/43

n mn hc

trang 10

SVTH:

STT Hng mcn v Nm tnh

tnh 2015 2020 2025- Tiu chun cp nc

cho KCN- Tiu chun cp nc

1ha/ng.L/ng/ng

30120

30120

40150

6 Thot nc bn- u lng nc thidn dng

- Chtiu that ncthi CN

m3/ngy

ha/ngy

80%nccp

20 20 30

7 Cp in :- Tiu chun cp indn dng

KW/ng/nm 700 1000-1200

1000-1500

Ngun :Theo thng k ca phng TKTX B Ra)

3.4Cc ch tiu thng ca ngun nc

Theo kho st quan trc v phn tch thnh phn, tnh cht ch yu ca nc sngDinh gm c:

ng 33Thnh phn c trong ngun nc

STT Ch tieu Nc mat TCVN 33:2006

01 PH 6,7 6.58.5

02 o uc (N.T.U) 40 2

03 o mau (TCU) 78 15

04 o kiem (mgl/l) 4 < 10

05 o man mg/l (Cl-) 200 < 250

06 Sat (mg/l) 0.3 0.3

07 Nitrit mg/l (NNO2) 0,002 3

08 Nitrat mg/l (NNO3) 0,2 50


11/43

n mn hc

trang 11

SVTH:

09 Amoni mg/l 0,1 < 1.5

10 Mangan (mg/l) 0.2 < 0.2

11 Ca2+(mg/l) 20 100

12 Vi Sinh(Coliform/100mg) 4000 0

13 Ham lng can (mg/l) 800

3.5nh ton tng th lu lng

Dn s n 2020 cho dn s ni th l N= 145.000 dn

1. Lng nc dng cho sinh hot m3 /ngyron :

qtc: lng nc 1 ngi tiu thtrong 1 ngy m (l/ng.ngy)

qtc 150 ln.n tr n 3.114 C 33-2006 n o t lo 3 t 100nn n tr ln

N: s dn tnh ton

m3/ngyK: k s khng iu ha Kngy.max 1.2-1.4 mc 3.3 trang 5 TCVN 33:2006)

2. u lng nc cp cho cc x nghip cng nghip nh aphng v tiu th cng nghip nm ri rc:

m3/ngy m

3. Lu lng nc ti ng, ti cy: m3/ngy.mTrong : nc ti ng chim 60% l:


12/43

n mn hc

trang 12

SVTH:

m3/ ngy.mNc ti cy chim 40% l:

m3

/ ngy.m

4.Lu lng nc cp cho cc cng trnh cng cng m3/ngy.m5.Cng sut hu ch cn cp cho th x

=38171.25 m3/ngy.m6.Cng sut ca trm bm cp 2 pht vo mng li: 45805.5 m3/ngy.m

Kr=1.1 1.2 (tcvn 33:2006)

Cp nc cho giai on 2020 chn Kr = 1.2

7.Xc nh cng sut ca trm x lTa c cng thc tnh lu lng nc cha chy =10,8 30 3 1= 972m3/ngTrong qcc: tiu chun cha chy

n : s m chy xy ra ng thi

k : h s xc nh theo thi gian phc hi nc d tr cha chy

theo QCXDVN lng nc dng cho bn thn trm x l ly theo

Kxl= 1.041.05(TCVN 33-85)

Vy cng sut ca trm x l l:

m3/ngy trn l 50.000 m3/ng =2083,3m3/h=0.58m3/s

3.6 xut chun cng ngh

Theo cht lng ngun nc ta c th ra cng sut sau: Phng n 1:

Cng trnhthu

B lngngang

B phnng c lpcn l lng

B trn ckh


13/43

n mn hc

trang 13

SVTH:

phng n 2

Thuyt minh qui trnh cng nghPhng n 1:

Nc t sng dinh sc bm ln trm bm cp 1, ti ngn thu nc lp t song

chn rc cn nhng vt ni trong n, tngn thu sang ngn ht ta t li chn

rc nhm loi b nhng vt cn m song chn rc khng cn ni, qu trnh bm

khng b nght. sau nc c bm v b trn c kh.

Ti b trn c kh nc sc cc cnh khuy xo trn vi dung dch ha cht phn,

nhc b trn m cc ha cht c ha tan u v nhanh vo nc, gip cho qu

trnh kt bng c din ra nhanh hn.

sau khi trn nc c dn sang b phn ng c lp cn l lng ti y cc bng cn

s lin kt li vi nhau v nc c dn sang b lng ngang din ra qu trnh lng

ca cc bng cn , khi chng t n mt t trng nht nh.

Phn

B chanc sch

B lcnhanh

Mng litiu th

Mng litiu th

Trm mcp 2

B cha

B lcnhanh

B lngtrong c lpcn l lng

B trn ckh

Cng trnhthu

clo

clo

Phn


14/43

n mn hc

trang 14

SVTH:

b lng nc sau lng c thu bng mng rng ca c t 2/3 chiu di ca b

lng trn b mt v dn vmng tp trung ri dn sang b lc.

Ti b lc nhng ht cn c t trng nhhn t trng ca nc khng th lng c

sc gi li bi cc vt liu lc, trong b vt liu lc chnh l ct thch anh.nc sau khi lc c dn sang b cha, trong ng ng ta chm dung dich clo v

flo khtrng nc v chng su rng.

Nc b lng 1 thi gian ri bm ra ngoi mng li.

Phng n 2:

Cng tng tnh phng n 1 nhng ta khng dng b lng ngang v b phn ng

c lp cn l lng m thay vo l b lng c lp cn l lng. ti b ny cc ht cn

s t kt hp vi nhau thnh nhng bng cn ln ri lng xung y b.

La chn phng n x ng:

Phng n 1:

u m:

Trong dy chuyn ny b lng hot ng n nh, c th hot ng tt ngay c khi

cht lng nc u vo thay i.

B lng ngang hp thnh mt khi vi b phn ng c lp cn l lng, nn trong qutrnh vn hnh c ddng hn.

Nc m:

So vi dy chuyn 1 th khi lng cng trnh nhiu hn, tn nhiu din tch hn

Phng n 2:

u m:

Khi lng cng trnh nh, tit kim c din tch t ai xy dng.

B lng trong c lp cn l lng t hiu qu x l rt tt.Nc m:

B lng trong c lp cn l lng rt nhy cm vi sdao ng vlu lng v nhit

ca ngun nc

Thay i lu lng khng c qu 15% v nhit khng qu 1oC trong vng 1h.

nu lu lng thay i tht thng c th gy xo trn cn gy hiu qu thp


15/43

n mn hc

trang 15

SVTH:

qun l vn hnh phc tp: tng cn l lng i hi phi c 1 chiu cao nht nh,

theo di thng xuyn cht lng nc u ra sau b lng thu cn hp l.

sau khi so snh ta nhn thy rng phng n 1 nn chn l phng n xy dng.

3.7 La chn cc cng trnh l3.7.1 B trn

Dng phng php trn thy lc vi b trn ng, y l loi b trn thng c sdng ph bin hin nay trong cc trng hp c dng vi sa kim ha nc vicng sut bt k. V ch c b trn ng mi m bo gi cho cc phn t vi trngthi l lng, lm cho qu trnh ha tan vi c trit . Cn nu s dng b trn khcth vi s b kt ta trc cc tm chn. S dng cht keo t l phn nhm. Mt khc,n c cu to n gin, vn hnh d , chi ph qun l thp do dng nng lng nc

trn, ph hp vi quy m cng sut v dy chuyn cng ngh x l.

3.7.2 phn ng to ng

pn n v nn

Thng dng kt hp vi b lng ngang. Nguyn l cu to c bn ca b l dng ccvch ngn to ra s i chiu lin tc ca dng nc. B c u im l n gintrong xy dng v qun l vn hnh. Tuy nhin, c nhc im l khi lng xy

dng ln do c nhiu vch ngn v b phi c chiu cao tha mn tn thp plc trong ton b.

pn n lp n l ln

B phn ng c lp cn l lng thng c t ngay trong phn u ca b lngngang. B thng c chia thnh nhiu ngn dc, y c tit din hnh phu vi ccvch ngn ngang, nhm mc ch to dng nc i ln u, gi cho lp cn l lngc n nh. u im ca b ny l cu to n gin, khng cn my mc c kh,khng tn chiu cao xy dng.

3.7.3 lng

ln nn

B lng c dng nc chy ngang cn ri thng ng hay cn gi l b lng ngang.Cu to b lng ngang gm bn b phn chnh: b phn phn phi nc vo b, vnglng cn, h thng thu x cn. Cn c vo bin php thu nc lng, ngi ta chia

b lng ngang thnh hai loi: b lng ngang thu nc cui v b lng ngang thu

nc u trn mt. B lng ngang thu nc cui thng kt hp vi b phn ng c


16/43

n mn hc

trang 16

SVTH:

vch ngn hoc b phn ng c lp cn l lng. B lng ngang thu nc b mtthng kt hp vi b phn ng c lp cn l lng.

B lng trong c lp cn l lng

B lng c u im l khng cn xy dng b phn ng, bi v trong qu trnh phnng v to bng kt ta xy ra trong iu kin keo t tip xc ngay trong lp cn llng ca b lng. Hiu qu x l cao hn cc b lng khc v tn t din tch xy dnghn. Nhng n c nhc im l kt cu phc tp, ch qun l cht ch, i hicng trnh lm vic lin tc sut ngy m v rt nhy cm vi s dao ng lu lngv nhit ca nc. Ch p dng b lng trong c lp cn l lng khi nc a vocng trnh c lu lng iu ha hoc thay i dn dn trong phm vi khng qu15% trong 1 gi v nhit nc a thay i khng qu 1 0C trong 1 gi. V vy

vi trnh qun l vn hnh cha cao th khng nn dng b lng trong.

3.7.4 lc nhanh

B lc nhanh l b lc nhanh h ph thng, l loi b lc nhanh mt chiu, dng nclc i t trn xung di, c mt lp vt liu lc l ct thch anh v lc trng lc,c s dng trong dy chuyn x l nc mt c dng cht keo t.

u im ca b lc nhanh l c tc lc ln gp vi chc ln so vi b lc chm. Dotc lc nhanh t 6 15m/h) nn din tch xy dng nh v do c gii ha cng

tc ra b nn lm gim nh cng tc qun l v n tr thnh loi b lc c bn,c s dng ph bin trong cc trm bm cp nc trn th gii hin nay.

Tuy nhin n c nhc im l tn ng v thit b, tng chi ph qun l nht l chiph in nng cho vic ra b).

3.7.5 cha nc ch

Chn b cha c mt bng hnh ch nht, t na chm na ni thun tin cho vic

b tr b lc. Bn trn b c np y, ng thng hi v lp t trng cy c gi chonhit n nh.

CHNG 4 TNH TON CHI TIT CC CNG TRNH XL NC

4.1 CNG TRNH THU:

Chn loi cng trnh thu nc v trm bm b tr kt hp trong mt nh


17/43

n mn hc

trang 17

SVTH:

Tnh tnh ton cng trnh thu gm nhng ni dung sau

Song chn rc

Li chn rc

Ngn thu ngn ht4.1.1 Song chn rc

Din tch cng tc ca song chn rc c xc nh theo cng thc sau

Q: lu lng tnh ton ca cng trnh Q0,58m3/s)

V: vn tc nc chy qua song chn rc theo tiu chun 33:2006 vn tc ny lytrong khong 0,30,1m/s trong trng hp hng thu nc ngp)chn v0,2

K1: h s co hp gia cc thanh thp v c tnh bng cng thc

trong a:l khong cch gia cc thanh thp nm trong khong4050mm) chn 50mm

d: ng knh thanh thp ( c tit din trn c ) chn vy K2: h s co hp do rc bm vo song v thng ly l 1,25

K3: h s nh hng hnh dng ca thanh thp

Tit din trn th K1,1

Tit din ch nht K1,25

Vy K31,1 v thanh thp ta chn y l thanh thp trn)

n: s ca thu nc chn ca thu nc l 2)

Vy =4,79 m2Chn DS = BS = 4.1.2 Li chn rc


18/43

n mn hc

trang 18

SVTH:

Din tch cng tc ca li c xc nh theo cng thc:

Trong Q l lu lng tnh ton (Q =0,58)

n: slng ca t li (thit k ta chn n=2)

v: vn tc nc chy qua li

i phng V= 0,20,4m/s chn V=0,3m/s

i quay V=0,150,8 m/s

Thit kli phng chon V=0,3m/s

K1: h s co hp c xc nh a: kch thc mt li (2255mm) chn a= 44mm

d: ng knh dy an li ( bng thp 11.5mm) chn d = 1,4mm

p: t l phn din tch b khung v cc kt cu khc chim din tch cng tc ca li.

K2: h s co hp do nh hng ca rc bm vo (K2=1,5)

K3: h snh hng ca hnh dng (K3=1,151,5) chn K3 =1,4

Vy Chn DL=HL=

4.2 nh ton liu lng ha cht

4.2.1 hit nh lng liu lng phn

Da trn cc thng s sau: Q50000m3/ngym

Hm lng cn 800mg/l

mu 78 PT-CO


19/43

n mn hc

trang 19

SVTH:

c 40N.T.U

Cn c vo hm lng cn ca ngun nc mt l 800 mg/l chn liu lng phnnhm khng cha nc dng x l nc c theo bng 6.3 trang 26 tcvn 33:2006l 60mg/l

Cn cvo mu ca ngun nc l 78 PT-CO, nn liu lng phn nhm c xcnh l

PAL=So snh liu lng phn dng khc v liu lng phn dng kh mu tachn liu lng phn bng 60mg/l l lu lng tnh ton

Dung tch b trn phn:

Trong Q2083.3 m3/h

n: s gigia 2 ln ha tan i vi trm cng sut:

1000050000m3/ngy, n=812 gi

P: liu lng phn dtnh cho vo nc PAL= 60mg/lbh: nng dung dch phn trong thng trn ly bng 1017% chn bh=12%

khi lng ring ca dung dch = 1 tn/m3Chn 2 b trn, kch thc mi b l: 2,4m*2m*1,3m

Dung tch btiu th:

Trong : bt410%) chn bt=8%

Bt:nng dung dch phn trong thng tiu th

Chn 2 b tiu th, mi b c kch thc l:1.5m*2.9m*2.2m

Chiu cao an ton b tiu th( 0.30.5m) chn hbv = 0.5m

Chn thng qut gi v tnh ton ng dn kh nn


20/43

n mn hc

trang 20

SVTH:

C 2 b trn lm vic ng thi, tng din tch 2 b:

2*(2.4*2)=9.6m2

u lng gi phi thi thng xuyn vo b trn l:

.76m3/pht=0.096 m3/sTrong : wh:F din tch b mt b

cng kh nn thng ha trn chn = 10l/s.m2

(teo CVN 33:2006 trn 29 n s k ha tan phn ly 810l/s.m2)

u lng gi cn thit b tiu th l:

*5*12.76=3.83m3/phtTrong : cng kh (35l/s.m2)

Hai b tiu th lm vic ng thi, tng din tch ca 2 b:

2 * 2.9 * 2.2 = 12.76 m2

Tng lu lng gi i vo c 2 b l:

=5.76 + 3.83 = 9.59 m3/pht=0.16m3/sng knh ng chnh l:

Trong : theo tcvn 33:2006 trang 29 v1015m/s) chn v=15 m/s

ng knh ng dn gi n thng ha trn:

ng knh ng dn gi n y thng ha trn


21/43

n mn hc

trang 21

SVTH:

ng knh ng nhnh vo thng ha trn

Ta tht k 3 nhnh

Suy ra: Tnh l khoan trn gin ng gi b ha trn:

Theo tcvn 33:2006 mc 6.22 trang 29 ta c

dL=34mm

vL=2030m/s

Chiu di ng nhnh:

ln=2, chn dL=4m, vL=25m/s

Din tch l:

Tng din tch cc l trn 1 ng nhnh l:

S l trn 1 nhnh:

Nu khoan 1 hng l th khong cch gia cc l l:

4.2.2 Tnh ton liu lng vi cho vo

Liu lng cht kim ha vi ) c xc nh the cng thc:


22/43

n mn hc

trang 22

SVTH:

( ) Trong : Pk: hm lng cht kim ha

Pp: hm lng phn ln nht trong thi gian kim ha, Pp=60mg/l

E1,e2: trng lng tng ng ca cht kim ha v ca phn, ta c

i vi vi( theo cao) e1=28

i vi phn (Al2(SO4)3 e2=57

Kt: kim nh nht ca ngun nc (Kt=4)

C: t l cht kim ha nguyn cht c trong sn phm s dng c=80%

Vy kim t nhin ca nc m bo cho Qutrnh ny thy phn phn, trng hp ny khng cn kim ha nc.

4.3 B trn c kh

B trn c kh c tc dng gip cho ha cht tip xc u vi nc. n a phn tha cht vo trng thi phn tn u trong nc khi phn ng xy ra, ng thi to

iu kin tt nht gia chng vi cc phn t tham gia phn ng. khi cho phn vonc chng s tc dng vi mui ca ca, mg to thnh cc hydroxit km tan d ktta. bng kt ta ca phn s hp dn cc ht keo tnhin. Do , cc ht c kchthc ln s d lng hn.

4.3.1 nh ton kch thc ca

Q=50000m3/h=2083.3m3/h=0.58m/s

Theo tcvn 33:2006 mc 6.58 trang 33 thi gian lu nc trong b trn t (45 giy90giy) chn t=60s

Ta c th tch ca b l:

Chn 2 b c din tch hnh vung, th tch mi b l:34.8/2=17,4m3

Chn chi cao b h=4( theo t l chiu cao: chiu rng = 2:1)


23/43

n mn hc

trang 23

SVTH:

Din tch b trn l

Chiu di v chiu rng:

a= Chiu cao xy dng ca b l:

+ hbv = 4 + 0.5 = 4.5 m4.3.2 Thit b khuy trn:

Dng my khuy tuabin 4 cnh nghing 45

o

hng ln trn y nc tdi lntrn.

ng knh tuabin:

D1/2a0.52.11.05m. chn D= 1,1m

Nng lng cn truyn vo nc

J/s=15.7kwTrong : G1000s

-1

gradien vn tc

0.0009 Ns/m2 nht ng lc ca nc ng vi t=25oc

Hiu xut ng c 0.8

Cng sut thc t ca ng c:

=19.6kwS vng quay ca my khuy:

( ) ( )

My khuy t cch y hDng knh my khuy

Chiu rng cnh khuy bng 1/5 ng knh my khuy

Chiu di cnh khuy ly bng ng knh my khuy.


24/43

n mn hc

trang 24

SVTH:

(Ly theo sch tnh ton cc cng trnh x l v phn phi nc ca tc gi trnh xunlai)

Vy: Chiu di cnh khuy l 0.25 m

Chiu rng l:0.2 m

4.4 B phn ng c lp cn l lng4.4.1 Kch thc b

Din tch mt bng b:

Trong :

Q: cng sut ca trm x l

v: vn tc i ln ca b phn ng, vi hm lng cn 800 mg/l, tra bng trong schca nguyn ngc dung trang 57 ta c v=2.2 mm/s

N: s b lng

Chn chiu rng ca b phn ng l 5,4m

Chiu di ngn phn ng l:

Chn thi gian lu nc trong b l t= 25 pht

Th tch b phn ng:

Chiu cao hu ch ca b l:

Chiu rng y b chn b= 0.3m

Chiu cao phn hnh thp:


25/43

n mn hc

trang 25

SVTH:

( ) Chiu cao tng cng l:

H= 3.3+2.07+0.5=5.87 m

4.4.2 H Thng Phn Phi NcNc theo mng vo mng ri theo ng ng phn phi xung y b.

Mng phn phi su 2.1 m rng 0.8m

Kch thc mng phn phi cao 1m di 8 m rng 0.8m

Th tch mng: Thi gian lu nc trong mng:

Chn 6 ng dn nc t mng xung y b

ng nc qua mi ng chnh l:

Chn =150

Vn tc nc chy trong ng l:

Tng chnh nc s c phn phi theo hai hng ng nhnh xung y bphn phi nc.

u lng nc mi ng nhnh l:

ng knh ng nhnh:


26/43

n mn hc

trang 26

SVTH:

Chn d=90

Khong cch gia cc ng chnh l:

Hai ng u tin cch tng l 0.5 m

Khong cch gia hai ng nhnh:

4.4.3 Tnh ton vch ngn

Trong ngn phn ng t hai tng trn hng dng

Khong cch gia cc tng trn l:

Chn chiu cao lp nc trn tng l hnt=0.6m

Chiu cao bc tng trn tnh ty ln ti nh l:

ht=H-hbv-hnt=5.87-0.5-0.6=4.77m

4.5 lng ngang4.5.1 Kch thc

Vn tc trung bnh ca dng nc trong b c tnh theo cng thc:

Trong :

uo: Tc ri ca ht cn qui phm 0.50.6 mm/s i vi nc c x l bng phntra trong bng 6.9 TCVN 33:2006 ) chn 0.6

L/Ho 10 15 20 25

K 7.5 10 12 13.5


27/43

n mn hc

trang 27

SVTH:

1.33 1.5 1.67 1.85(Ngun sch x l nc cp ca nguyn ngc dung trang 76)

Theo mc 6.72 TCVN 33:2006 vtb i vi nc c va v c l 912mm/s chnvtb=10mm/s

K ph thuc vo t s /Hov chn t s l 15 tra bng trn

Ta c K=10, T cng thc*) ta c: vtb=100.5=6m/s

Din tch mt bng b lng l:

Chn s b lng l n6 b

Chn chiu cao vng lng 34m theo mc 6.72 trangh 37) chn Ho3m

Chiu rng ca mt b l:

Mi b chia lm 2 ngn

Chiu rng 1 ngn l: b5.4/2=2.7m

Chiu di b:

Kim tra li t s /Ho 45/315 ng vi t l chn

Nu chiu rng mi ngn l 2.7m hng l cui cng nm cao hn mc cn tnh ton l0.3m theo tiu chun l 0.30.5m) th din tch ca vch ngn phn phi vo b tcch tng l 1.5m chn theo qui phm t 12m theo mc 6.77 trang 38) l:

7.29m2u lng nc tnh ton qua mi ngn ca b l:


28/43

n mn hc

trang 28

SVTH:

4.5.2 Tnh ton mng thu nc

Nc t b phn ng c lp cn l lngc lp cn l lng chuyn sang b lng quavch ngn st thnh trn, ngp su 0.3m hng dng nc chy xung phn b utrn b mt v trnh xo ng b mt b.

Chiu cao mc nc trn thnh trn:

Phn thu nc sau b lng dng mng rng ca

Chiu di mng:

Mt ngn ta b tr mt mng thu, tc trong mng thu vm=0.60.8m) chnvm=0.8m theo mc 6.84 trang 39

Tit din ca mng thu:

Chn chiu rng mng: chn bm=0.5m

Chiu su mng:

Chiu cao bo v l 0.17

Chiu cao tng cng:

h = 0.12 + 0.17 = 0.3 m

Trn thnh b tr vnh mng rng ca hnh ch V gc 90o tm bng inox dy 0.08m,c 1m x 5 ch V cao 5cm, y rng 10cm.

S lng ch V l:


29/43

n mn hc

trang 29

SVTH:

27+0.5)*2*5275 ch V

u lng nc qua 1ch V l:

4.5.3 Tnh ton mng thu cui

Vn tc mng vm0.60.8m/s ta chn l 0.8

Tit din ca mng l:

Chiu di ca mng ly bng chiu rng ca b l dm= 5.4m

Chn chiu rng mng l Rm=0.8m

Chiu su ca mng l:

4.5.4 Tnh ton thit x cnTa chn x cn bng phng php thy lc khng phi cho b ngng lm vic)

Vic x cn d kin tin hnh theo chu k vi thi gian gia 2 ln x l T24h


30/43

n mn hc

trang 30

SVTH:

Th tch vng cha nn cn ca b lng l:

trong :

T: Thi gian lm vic gia 2 ln x cn 624h)

Q: u lng nc a vo b Q2083.3m3/h

N; S lng b lng N6 b

C: Hm lng cn cn li trong ncsau khi lng 1012 mg/l)

:Nng trung bnh ca cn nn cht chn l 35000(Tra trong bng 6.8 trang 36 ca TCVN 33:2006)

Cmax: hm lng cn trong nc a vo b lng, v c xc nh theo cng thcsau:

Cmax=Cn+KP+0.25*M+v=800+1*60+0.25*78+0=879.5mg/l

Cn: Hm lng cn nc ngun mg/l)

P: iu lng phn tnh theo sn phm khng cha ncg/m3)

K: H s ph thuc vo tinh khit ca phn s dng

i vi phn nhm sch K0.55

i vi phn nhm khng sch K1.0

i vi phn st clorua K0.8

M: mu ca nc ngun ) thang mu platin- coban

v: iu lng vi kim ha nc nu c mg/l)

Din tch mt bng ca 1 b lng:

Chiu cao trung bnh ca vng cha cn l:


31/43

n mn hc

trang 31

SVTH:

Chiu cao trung bnh ca b lng:

=3+0.9=3.9mChiu cao xy dng ca b lng l:

Tng chiu di ca b lng k c ngn thu v ngn phn phi l:

Lb= 45+2*0.8=47m

Th tch ca 1 b lng l:

u lng nc tnh bng phn trm mt i khi x cn 1 b l:

Dung tch cha cn ca 1 ngn l:

u lng cn 1 ngn l:

(Thi gian x cn theo qui phm 810 pht chon t= 10 pht)din tch mng cn chn v1.25m/s)

chiu rng mng ab/2

4.6 lc

4.6.1 Kch thc


32/43

n mn hc

trang 32

SVTH:

Din tch b lc c tnh theo cng thc:

Trong :Q: Cng sut ca trm x l Q50000m3/ng

T: Thi gian lm vic ca trm mt ngy m, T24h

Vtb: Tc lc tnh ton ch lm vic bnh thng ly theo bng 6.11 theo tcvn33:2006 ta c Vtb=7 m/h

a: S ln ra b lc trong 1 ngy m ch lm vic bnh thng, a2

W: Cng ra, tra bng 6.13 TCVN ta chn W15l/s-m2

t1: Thi gian ra ly theo bng 6.13 ta c t16 pht 0.1h

t2: thi gian ngng b lc ra theo mc 6.102 l 0.35 h

S lng b lc cn thit l:

Chn N9 b

Kim tra li tc tng cng vi iu kin ng 1 b lc ra l:

(nm tron qu pm t 79.5 m teo n 6.11 TCVN)

Trong : N1s b ra

Din tch ca 1 b lc l:

Chn kch thc 1 b l: 5.6*6.6m

Chiu cao ton phn ca 1 b lc l:


33/43

n mn hc

trang 33

SVTH:

Trong : hVL: chiu dy lp vt liu ly theo bng 6.11 tcvn ta c 1.5m

hN: Chiu cao lp nc pha trn vaatk liu lc 2m) chn l 2

hD: Chiu cao lp si ly theo bng 6.12 tcvn ta c 0.7m

hBV: Chiu cao bo v ca b 0.3m)

4.6.2 Xc nh h phn phi nc ra lcTa thit k bin php ra lc y l gi kt hp vi nc

Cng nc ra lc, chn W15 l/sm2 theo qui phm 1416 l/sm2) teo n

6.13 TCVN

ng vi n trong nc i vi vt liu lc l 30%

Cng gi ra lc, Wgio18l/sm2 theo qui phm 1520) tron m 6.123 TCVN

u lng nc dng ra b lc:

Ta chn ng knh ng chnh dc600mm lm bng thp khng gVy tc nc chy trong ng:

(Nm tron qu pm o pp 1.52 ms teo m 6.120 TCVN)

Khong cch gia cc ng nhnh theo m 6.122 TCVNl (250300mm)

Ta chn 0.28m

S ng nhnh ca 1 b lc l:

46 ngu lng nc chy trong mi ng l:


34/43

n mn hc

trang 34

SVTH:

=0.012 m3/sChn ng knh ng nhnh c dn 100mm bng thp

Tc nc chy trong ng nhnh:

(Ph p teo qu pm 1.62m teo m 6.111 TCVN)

Tit din ngang ca ng chnh:

Tng din tch l ly bng 0.250.5) tit din ngang ca ng0.35

(L teo m 6.111 TCVN)

Tng din tch ca l l:

Chn l c ng knh thuc khong 1012mm) ly theo mc 6.104chn 12

Din tch 1 l l:

Tng s l :

S l trn 1 nhnh;

Trn mi ng nhnh, cc l xp thnh 2 hng so le nhau, hng xung pha dinghing 1 gc 45o so vi mt phng nm ngang.

S l trn mi hng ca ng nhnh l:


35/43

n mn hc

trang 35

SVTH:

Khong cch gia cc l:

Trong : 0.525 ng knh ngoi ca ng gi chnh

4.6.3 Tnh ton mng phn phi nc lc v thu nc ra lcB lc c chiu di 6.6m, ta b tr mi b 3 mng thu nc ra lc c y l hnh tamgic.

Khong cch gia cc mng s l:

( t teo qu pm kn ln n 2 teo m 6.117QCVN)

ng nc ra vo mi mng l:

151.96=171 l/s = 0.171 m3/sTrong :W: cng ra lc, W15 l/sm2

d: khong cch gia cc tm mng, d1.9m

l: chiu di ca mng, l6m

Chiu rng mng:

Trong :

a: t s gia chiu cao phn ch nht hcn) vi na chiu rng ca mng, theo quiphm a11.5) theo mc 6.17 TCVN a=1.2

K: h s ly bng 2 i vi mng c tit din y na vng trn

bng 2.1 i vi y c tit din hnh tam gic.

Chiu cao phn mng hnh ch nht:


36/43

n mn hc

trang 36

SVTH:

Ta chn chiu cao phn y tam gic ca mng h0.2 dc mng ly v pha tp trung l: i0.01

Chiu dy thnh mng Vy chiu cao ton phn ca mng l:

Khong cch t b mt lp vt liu n mp mng thu nc l:

Trong :

: chiu dy lp vt liu lc, 1.5m

e: gin n tng i ca lp vt liu lc, c ly theo bng 6.13 ca tcvn, e30%

Theo mc 6.124 khong cch y ng hoc mng phi nm cao hn lp vt liu lc l100mm.

Chiu cao ton phn ca mng l 0.55m, nhng v mng dc v pha mng tp trungvi dc thy lc l i0.01 v mng di 6 m nn chiu cao mng pha di mngtp trung l:

0.55+0,016=0.67m

vy

Nc ra lc t mng thu trn vo mng tp trung nc nn khong cch t mng thun mng tp trung l:

Trong : qM:lu lng nc chy tp trung, qMqm*30.594m3/s

A0.75 chiu rng mng tp trung thng A6m)


37/43

n mn hc

trang 37

SVTH:

g: gia tc trng trng, g9.81m/s2

4.6.4 n tht p lc khi ra lc nhanhTn tht p lc khi lc

Tn tht p lc trong h thng phn phi bng gin khoan l

trong :

vc: tc nc chy trong ng chnh, vc=1.95 m/s

vn: tc nc chy trong u ng nhnh, vn=1.76 m/s

g; gia tc trng trng, g=9.81 m/s2

: h s sc cn c xc nh theo cng thc

Vi kW0.35 l t s gia tng din tch cc l trn h thng phn phi v din tch

mt ct ngang ca ng chnh.

Tn tht p lc qua lp si :

Trong :

Ls: chiu di lp si , s0.7ly theo bng 6.12 tcvn)

W: cng ra lc, W15 l/sm2

Tn tht p lc trong vt liu lc

Vi kch thc ht d=0.51mm a=0.76, b=0.017, e=30%

p lc ph v kt cu ban u ca lp ct lc ly hBM2m

vy tng tn tht p lc trong ni b b lc l:


38/43

n mn hc

trang 38

SVTH:

4.7 cha nc chp ng nhu cu d tr v cha chy khi cn thit, chn b cha nc sch c dungtch 10%Qtrm

Wb 10%500005000 m3

Xy dng 3 b cha, mi b c chiu cao l 3.5m

Din tch 1 b l:

Chiu cao xy dng ca b l:

3.5+05=4 m

Kch thc 1 b l: 20*24m

4.8 H c c nn v phi n khng cn kh cn xhng ngy:

kg/ngng bn cn nn trong vng 4 thng:

Din tch mt h cn thit:

Ta thit k 4 b c tit din 50*100m lun phin lm vic trong nm.

Sau 4 thng nc rt ra khi h, phi bn trong 3 thng nng bn t25%, t trng ca bn l 1,2 tn/m3

Th tch bn kh trong h:


39/43

n mn hc

trang 39

SVTH:

Chiu cao bn kh trong h:

ng cn kh x ra hng ngy G43.475 kg nng cn khong 0,4%,ttrng bn 1,011 tn/m3.

Trng lng dung dch cn x ra hng ngy:

Th tch bn pha long ra trong 1 ngy l:

,75 m3Chiu cao phn bn long trong h:

0.49 m

Chiu cao hu ch trong b:

Chn chiu su ca h l 1.5m

Trong : hy: y lt lp si c chiu dy 0.4mhdtr: 0.3m

hchacn = Hhyhd tr = 1.5-0.4-0.3=0.8 m

H c kh nng cha cn trong vng 1 nm, mi nm vt h 1 ln.

Vy chiu rng tng cng ca h l:


40/43

n mn hc

trang 40

SVTH:

Chiu di tng cng:

Vi C5 chiu rng ca 1 ln xe ti chuynng.4.9ng tm tt cc cng trnh trn

Thng s S liu thit kn nguyn 2 bDin tch1 b 4.4 m2Chiu cao 1 b 4 m

Chiu di 2.1mChiu rng 2.1 m

phn ng c lp cn l lng

Thng s S liu thit kn nguyn 6 bDin tch 1 b 43.9 m2Chiu di 8 m

Chiu rng 5.4 mChiu cao 5.87 m

lng ngang

Thng s S liu thit kn nguyn 6 bDin tch mt bng 1446.7 m2Chiu rng 5.4m

Chiu di 45mChiu cao 4.4 m

lc:

Thng s S liu thit kn nguyn 9 bDin tch 328.3 m2Chiu rng 5.6 mChiu di 6.6 m


41/43

n mn hc

trang 41

SVTH:

Chiu cao 4.7 m

cha

Thng s S liu thit kn nguyn 3 bDin tch 476 m2Chiu cao 3.5 mChiu di 24 mChiu rng 20 m

i liu tham kho

Sch x l nc cp tc gi Nguyn Ngc Dung

Sch tnh ton cng trnh nc cp tc gi Trnh Xun ai

TCVN 33:2006

Mc Lc

Contents

C 1 Mu ................................................................................................................. 1

1.1 t vn .................................................................................................................... 1

1.2 Mc ch ca n ...................................................................................................... 1

1.3 i tng nghin cu................................................................................................... 1

a) Nc ngm................................................................................................................... 1

b) Nc mt ..................................................................................................................... 2

1.4 Phm vi nghin cu...................................................................................................... 3

1.5 Ni dung nghin cu .................................................................................................... 3

1.6 Phng php nghin cu ............................................................................................. 3

1.7 K hoch thc hin ...................................................................................................... 3

CHNG 2 GII HI NG QN............................................................................... 4

1 x B Ra .......................................................................................... 4

u kin t nhin .............................................................................................................. 5

2.2.1 Vr a l ................................................................................................................... 5

2.2.2 a hnh.................................................................................................................... 5

2.2.3 Kh hu .................................................................................................................... 6


42/43

n mn hc

trang 42

SVTH:

2.2.4 r ..................................................................... 7

2.3 iu kin kinh t - x hi.............................................................................................. 7

C C C .......................................................................................... 8

1 M r 1 2020 ................................................................. 8

................................................................................................................... 8

............................................................................................... 8

C ............................................................................... 10

............................................................................................ 11

36 xut chun cng ngh....................................................................................... 12

37 La chn cc cng trnh l .......................................................................................... 15

371 trn .......................................................................................................................... 15

.................................................................................................... 15

.......................................................................................................................... 15

c nhanh .................................................................................................................. 16

........................................................................................................ 16

CHNG 4 NH ON CHI IT CC CNG TRNH XL NC......................... 16

CNG TRNH THU: .................................................................................................................. 16

4.1.1 Song chn rc ............................................................................................................... 17

4.1.2 Li chn rc ......................................................................................................... 17

4.2 Tnh ton li ng ha cht ........................................................................................... 18

4.2.1 Thit b ng li ng phn ............................................................................... 18

4.2.2 Tnh ton li ng vi cho vo .................................................................................... 21

4.3 B trn c kh............................................................................................................. 22

4.3.1 Tnh c ca b: .......................................................................................... 22

4.3.2 Thit b khuy trn:........................................................................................................ 23

4.4 B phn ng c lp cn l lng.......................................................................................... 244.4.1 Kch thc b .................................................................................................................. 24

4.4.2 H Thng Phn Phi Nc............................................................................................. 25

4.4.3 nh ton vch ngn ...................................................................................................... 26

4.5 lng ngang ...................................................................................................................... 26

4.5.1 Kch thc ................................................................................................................. 26

4.5.2 nh ton mng thu nc.............................................................................................. 28

4.5.3 nh ton mng thu cui .................................................................................... 29


43/43

n mn hc

4.5.4 nh ton thit x cn ................................................................................................. 29

4.6 lc .................................................................................................................................... 31

4.6.1 Kch thc .................................................................................................................. 31

4.6.2 c nh h phn phi nc ra lc ............................................................................ 33

4.6.3 nh ton mng phn phi nc lc v thu nc ra lc ........................................... 35

4.6.4 n tht p lc khi ra lc nhanh ............................................................................ 37

4.7 cha nc ch............................................................................................................... 38

4.8 H c c nn v phi n kh......................................................................................... 38

4.9 ng tm tt cc cng trnh .............................................................................................. 40

danc thay thiep

Documents