gas2-vong lam lanh propane

8/8/2019 Gas2-Vong Lam Lanh Propane

1/20

Chu trnh lm lnh Propane

Gii thiu chung

H thng lm lnh rt ph bin trong cng nghip sn xut khnhin v trong nhng qu trnh c lin quan trong cng ngh lcdu, ho du v cng nghip ho hc. Qu trnh lm lnh c s

dng h nhit ca kh xung nhit im sng chydrocarbon v sn xut cc nhin liu lng c th thy trn ttrng tiu dng hng ngy.

Trong bi ny, chng ta s i vo xy dng, chy, phn tch v iukhin h thng m phng chu trnh lm lnh Propane. Sau schuyn bn m phng hon chnh (Case) sang mt m hnh(Template), t n c th kt ni vi cc bn thit k m phn

khc.Cc mc tiu nghin cu

Khi hon thnh phn y, chng ta s c th:

- Nhp v kt ni cc thit b thnh mt lutrnh

- S dng giao din ha iu khin cc

lu trnh trong HYSYS- Hiu cch truyn thng tin xui-ngc trongHYSYS

- Chuyn case m phng thnh m hnh

Cc yu cu ban u

Trc khi bt u vo phn ny chng ta phi bit cc cch :

- Thit lp mt Fluid Package- Thit lp cc dng

1


2/20

- S dng giao din bn ghi (workbook )

2


3/20

Xy dng m phngBc u tin trong xy dng bt k bn m phng no l thit l Fluid Package. Di y l hng dn s lc cch thit lp 1 Fluid Packagev nhp cc dng. xem chi tit hn, cc bn cth xemDefining the Simulation Basis, Module 1, phn thit lpdng.Thit lp c s m phng

1. To New casev nhp Fluid Package2. Nhp cc gi tr sau trong cc ca s Fluid Package

3. Nhp chut vo phm Enter Simulation Environment khi bn hon tt vic khai bo v bt u xy dng m phng.

Thit lp dng

C nhiu cch to ra cc dng. (xem li semina 1, phn thit ldng).

3


4/20

- Nhp vo phm nng s xut hin bng trng thi, tnh cht ca dng.

- Hoc c th kch p vo biu tng Stream(Dng) trong Object Pallete (bng cc biu tng m phngthit b).

Thit lp cc dng cn thit:

Nhp mt dng vi cc gi tr cn thit sau:

Nhp dng th hai vi cc tnh cht sau:

Nhp cc thit b vn hnh vo lu trnh

Cng ging nh vic thit lp cc dng, c nhiu cch nhp cthit b vn hnh trong HYSYS:

S dng Thc hin thao tcMenu Bar T bng Flowsheet , chn Add Operationhocnhn phm nng, ca s cc thit b vnhnh s xut hin.

Workbook M Workbook v n trangUnitOps, sau nhp chut vo phm Add UnitOp, ca s ccthit b vn hnh s xut hin.

Object Palette

T bng Flowssheet , chnOpen Object Palette,

hoc nhn. Kch p vo biu tngthit b vn hnh bn mun nhp. PFD/ Object S dng chut phi, ko cc biu tng t

4

p sut ca dng 1 l bao nhiu?


5/20

Palette Object Palettesang PFD

Chu trnh lm lnh Propane bao gm 4 thit b: Van

Chiller My nn Thit b ngng t

Trong bi ny, chng ta s nhp tng thit b vi cc cch thit lkhc nhau. Nhp van J-T Van J-T c s dng m phng cho cc van trong HYSYS. Dngvo van l dng ra t thit b ngng t. Dng ra thit b ngng tnhit im bt ca n.Van c nhp bng cch nhn phm nng

1. Nhp vo phm nng, ca sUnitOptss hin th:

2. ChnValvet bng Available Unit Operations.3. Kch vo phm Add . Bng tnh cht ca bm s xut hin.4. Trn trangConnections, cung cp ng ni dng vo v

dng ra nh biu din bng sau:

5

C th chn lc nhanhhn AvailableUnit Operationsbng cch chn t Category ph hp. Trong trng hp ny Piping Equipment s bao gmValve


6/20

Nhp Chiller

Thit bChiller trong vng lm lnh Propane m phng trongHYSYS s dng thit b gia nhit. Dng ra khi thit bChiller nhit im sng.

Phng php ny m t cch nhp 1 thit b gia nhit s dng traUnitOpscaWorkbook

1. M Workbook v kch vo tabUnitOps

2. Nhp vo phm Add UnitOp, ca sUnitOpss xut hin3. Chn Heat Transfer Equipment t nhmCategories

4. Chn Heater t danh sch Available Unit Operations

5. Kch vo phm Add , hoc kch p vo Heater . Bng tnhcht ca thit b gia nhit s hin th.

6. Trn trangConnections, nhp cc thng tin nh sau:

6

Cc hp ko th nh vicc dng nguyn liu v sn phm, cha danh sch cc dng kt ni vithit b c m phng.


7/20

7. Chuyn sang trang Parameters.

8. Nhp gi tr Delta P l 7.0 kPa (1psi) v gi tr cng sut(Duty)l 1.00e + 06 kJ/h (1.00e+06 Btu/hr) choChiller .

9. ng bng hin th tnh cht li

Nhp my nn

My nn c s dng lm tng p sut ca dng kh vo.

7

Lu lng mol ca propane l bao nhiu ? chnh p qua van J-T l bao nhiu ?

Nhit dng ra khi van (dng 2) l bao nhiu ?

Trang Parameters chung cho hu ht cc thit bv cha cc thng s nh gim p (delta P),Cng sut (Duty) v Hiu sut (Efficiency).

t con tr chut vobiu tng my nntrong Object Palette,nhp p v a vo s PFD


8/20

Phng php ny m t cch nhp my nn s dngObject Palette.Object Palettel bng cha ton b cc dng v cc thit b vnhnh s dng m phng trong HYSYS.

1. Nhp vo phm nng, bngObject Paletes xut hin.2. Kch p vo biu tng my nn, bng tnh cht ca my

nn s c hin th.

3. Trn trangConections, nhp cc thng tin v dng biu dintrong hnh sau

4. Hon thnh trang Parameter nh sau:

8

Biu tng my nn


9/20

Nhp thit b ngng t

y l thit b cui cng trong chu trnh lm lnh Propane. Thit bny c t gia My nn v van v n c m phng nh thit b lm lnh.

Lm vic vi biu din ha, bn c th xy dng lu trnh c bn trong PFD bng cch s dng chut thit lp v kt ni thit b. Phng php ny m t cch nhp v kt ni thit b llnh s dng k thut ko-th(Drag n Drop)trongObject Palete.Phng php ko-th(Drag n Drop)trong PFD:

1. Nhn vo biu tngCooler trongObject Palete.

2. Di chuyn con tr n PFD. Con tr s chuyn sang 1 dncon tr c bit (l hnh 1 chic hp c gn biu tng 1 dcng). Chic hp s xc nh kch thc v v tr ca bitng thit b lm mt.

3. Nhp chut tri a thm thit b lm mt vo PFD.

C 2 cch kt ni thit b vi 1 dng trong PFD :

Phng php kt ni sdng...

Thc hin thao tc...

Phm dch chuyn Attach Mode

1. Nhp vo phm dch chuyn Attach Mode.

2. t con tr ln trn thit b. imkt ni dng nguyn liu cnh du bng mu xanh m.

3. Dch chuyn con tr n dng mta mun kt ni

4. Nhp v gi chut tri.5. Dch chuyn con tr n biu

tng thit b v nh chut.Phm 1. Nhp v gi phm v dch

chuyn con tr n thit b vnhnh.

2. t con tr n dng m chng tamun kt ni.

3. Nhp v gi chut tri.4. Dch chuyn con tr n biutng thit b, nh chut v phm

9

Biu tng thit b ngng t(Cooler)


10/20

.

5. T PFD, kt ni dng 4 vi dng vo thit b ngng t v kni dng ra thit b ngng t vi dng 1.

6. Kch p vo thit b ngng t.7. Trn trang Parameter , nhp gi tr Delta pl 35 kPa (5 psi).

Lu Case va hon thnh

10

Cng sut my nn l bao nhiu hp?


11/20

iu chnh PFD

PFD c thit k bng cch s dng chut v bn phm. C rnhiu cc trng hp m c chut hay bn phm u c th s d

thc hin cng 1 chc nng. Nhng c 1 chc nng PFD rquan trng m bn phm khng th s dng c, l kim tra tng(Object Inspection).

Chng ta th s dng rt nhiu cc thao tc v th thut trn c biu tng trong PFD bng cch s dng kim tra i tn(Object Inspection). t con tr chut trn biu tng m bn munkim tra v nhp chut phi. Khi s hin th cc bng tng ph thuc vo biu tng m bn la chn (nh dng, thit b phng, thp...).

Mt danh sch cc i tng m ta c th kim tra c cho dy vi cc danh mc tng ng :

11


12/20

Ty chnh PFD bng cch thc hin :

1. NhpTitle, Propane Refrigeration Loop.

2. NhpWorkbook Tablecho cc dng vt liu trong m phng.

3. NhpTablecho dng 4

12


13/20

Lu bn m phng ( Case ) thnh m hnh ( Template )

Mt tnh nng kh hu ch na ca HYSYS l kh nng lu lthnh cc m hnh (Template).

Mt cch c bn, mt m hnh l mt lu trnh hon chnh m cth lu tr vo a vi cc thng tin b sung . Cc thng tin ny glin vi vic nh km vo lu trnh nh vic vn hnh mt ltrnh con. Mt m hnh i din cho mt module qu trnh ca nhmy hay mt phn ca mt module. M hnh c lu tr c thc c t a sau v c ci t hiu qu nh mt lu trcon hon chnh c th vn hnh nhiu ln vi nhiu qu trnh m phng khc nhau.

Mt vi li ch ca vic s dng cc m hnh l :

- Cung cp cng c m nh 2 hay nhiucasec th c kt ni vi nhau.

- C th s dng nhiu h nhit ng khcnhau trong mtcasem phng chnh.

- Cung cp mt phng php thun tin trongvic chia nh mt bn m phng ln thnh cc phn n hv d dng qun l cc cu t.

- C th ch cn to mt ln v c th s dngnhiu ln cho nhiucasekhc nhau.

Trc khi chuyncase thnh templateth case cn phi clm ng nht n c th c s dng trong nhiu nh my c bin kh vi cc cc lu lng khc nhau. Trong phn ny, cnsut caChiller iu chnh lu lng ca Propanec yu cu.

1. Xa gi tr cng sut caChiller .

2. T bngSimulationchnMain Properties

13


14/20

3. Nhp vo phmConvert to Template

4. Nhp phmYes chuynCasem phng sangTemplate.5. Tr li Novi cu hiDo you want to save the simulation

case.

6. Lu Template thnh fileC3Loop.tpl.

Phn tch kt qu

Phn ny m t cch ly ra v in cc kt qu ca thit b vn hnh

In cc bn d liu k thut cho cc thit b vn hnhTrong HYSYS c th in kt qu bng:

- Menu Bar

- Object Inspection of Unit Operations

- Report Manager

* S dng Menu Bar :

Chn mt trong nhng la chn sau t File menu Print cc danh sch ca cc d liu k thut hin th i v

thit b vng hnh hin ti. Chng ta c th nh du 1 d lik thut v c th xem hoc in d liu .

14

ci t my in, chn Printer Setup t FileMenu, sau hocGraphic Printer hoc Report Printer.

Chn lnh in khi PFDang hin th s inbn PFD, khng ccc bn s liu kmtheo.


15/20

Print Snapshot in nh nh phn(bitmap)ca ca s HYSYSang hin th.

* S dngObject Inspection:

Nhp chut phi vo thit b vn hnh, hin th bng tnh cht, l

chn Print Datasheet . 1 danh sch cc Datablock c hin th choi tng.

* S dng Report Manager :

1. TMenu Bar , chnTools, ri nhp vo Report truy nhpvo bng Report Manger

2. Nhp vo phmCreat v nhp 1 Report mi v m Report Builder .

15


16/20

3. Kch vo phm Insert Datasheet nhp cc d liu va boco. Chng ta c th nhp d liu ca nhiu hay 1 thit b vhnh vo 1 bo co:

Nhp thng tin thit b vn hnh vo Workbook

MiWorkbook c 1 trangUnitOpsmc nh m n hin th tt ccc thit b vn hnh v cc kt ni ca chng vi m phngChng ta c th nhp cc trang b sung cho cc thit b vn hnring vo trongWorkbook . V d, ta c th nhp 1 trang voWorkbook m ch cha cc my nn trong m phng.

Cch nhp 1Unit Operation tabvoWorkbook :

1. M Workbook

2. TMenu Bar , chnWorkbook , sau nhp voSet up

3. Trong ca sSet up, nhp vo phm Add trong nhmWorkbook Tabs.

4. T giao dinNew Object TypechnRotating Equipmentv m rng danh sch ny, chnCompressor.

5. Nhp OK. Trang mi,Compressor ch cha thng tin camy nn c nhp vo workbook.

6. ng ca s ny li thot khiSetup

16


17/20

Nhp thng tin thit b vn hnh vo PFD

Vi mi thit b vn hnh, ta c th hin th mt bng tnh ch(Property Table)trn PFD. Bng tnh cht cha cc thng tin mcnh bit v thit b vn hnh.

Cch nhp thng tin thit b vn hnh vo PFD

1. M PFD.

2. Chn thit b vn hnh m bn mun nhp bng tnh cht.

3. Kch chut phi vo thit b vn hnh.

4. ChnShow Table menu

5. Sau khi bng c nhp, ta c th di chuyn n bng ccchn n ri ko bng chut.

6. Nu nhp chut phi voTable, ta c th thay i cc tnhcht ca n v s xut hin. ta cng c th ch r bng c thch ra bin s no.

17

Nhp p vo cc dng c du +s m rng

chn thit b c th

Ghi nh rng bn cth thao tc Object Inspect bng cch chnobject v sau nhp phm chut phi.


18/20

M phng nng cao

Mt trong cc hng thit k cha kha ca HYSYS l lm thno kt hp cc modul vn hnh vi gii php thut ton khntun t. Khng ch x l cc thng tin m bn cung cp ban um c cc kt qu tnh ton c t ng truyn i theo theo to b lu trnh theo c chiu xui v chiu ngc. Cu trc moduca cc thit b vn hnh c ngha rng ta c th tnh ton trtip, hay cng c th tnh ton bng cch s dng thng tin t mdng ra tnh cho iu kin ca dng vo. Hng thit k ny th c minh ha bng vic s dng chu trnh lm lnh Propane

Ban u, thng tin cp cho case ch l nhit v phn hi cho cdng 1 v 3 v thnh phn ca dng 1. Khi nhit , phn hi v vtr ca dng 1 bit, HYSYS s s dng t ng phng phtnh nhanh v xc nh cc tnh cht cn li (nh p sut, enthalpyt do, khi lng ring), nhng gi tr ph thuc vo dng.

Khi dng 1 v 2 c lin kt vi valve, J-T, u tin HYSYS xc

nh thng tin bit vi c dng vo v dng ra. Sau n s gncc gi tr ny vo cc dng khc. Trong trng hp ny, khi khngc chnh p ca valve c xc nh, ch c thnh phn venthalpy t do ca dng 1 bng vi cc gi tr ny ca dng 2.

Bng cch lin kt dng 2 v dng 3 vo thit b gia nhit,Chiller ,thnh phn ca dng 2 s c a n dng 3 (100% C3). HYSYlc ny c th tnh nhanh trn dng 3 v xc nh cc tnh cht cnli (nhng tnh cht ph thuc vo dng nh p sut, enthalpy).

18


19/20

S dng p sut tnh ton ca dng 3 v gim p qua Heater bit, HYSYS tnh li p sut ca dng 2. Sau khi p sut, thn phn v enthalpy t do ca dng 2 bit, v valve ng enthalpyHYSYS c th tnh nhit ca dng 2.

Ngoi ra, HYSYS s dng cng sut thit b gia nhit bit venthalpy t do ca dng 2 v 3 tnh ton lu lng, l i lnca c 3 dng 1, 2, 3.

Sau , my nn c nhp vo m phng. Sau khi tt c thng tidng vo bit, my nn ch cn li 2 bc t do. Cc gi tr nhhiu sut, cng sut, hoc p sut ca ra c th p ng 1 bc t Bc t do cn li n t thit b ngng t.

Thit b ngng t kt ni dng ra my nn vi dng voValve(gitr ny c xc nh hon ton). Ngi s dng cung cp gim p ca thit b ngng t, v HYSYS tnh ton p sut dnvo, m y cng l gi tr p sut dng ra ca my nn (bc t doth 2 ca my nn).

Thc hnh m phng

Bi tp 1:

Trong nh my, bn khng th o c hay tnh ton chnh xc cngsutChiller . Tuy nhin bn bit rng my nn c nh mc l250hp, chy 90% mc cao nht vi hiu sut 72%. Vy cng suChiller l bao nhiu?

ng h o dng kh voChiller cui cng c kim nh v bn c th xc nh cng sut caChiller . Nh my quyt nh tngcng sutChiller ln 1,5MMBTU/hr. vi my nn chy cng mlc (250hp), nhit Chiller tt nht m bn mong i l baonhiu?

Bi tp 2: Thnh phn mi cht lm lnh

Nh cung cp propane bn cho nh my ca bn hn hpPropane/Ethane (95/5 % mol). Cc nh hng g s xy ra nu ci vi thnh phn mi ny trong chu trnh lm lnh?

19

BI TP


20/20

S dngcasegc so snh:

Bi tp nng cao: Lm lnh hai cp

Thit lp chu trnh lnh hai cpBI TP

gas2-vong lam lanh propane

Documents