BI GING MN HC: B CHA DU KH 1PHN 1: M U 1Khi nim v phn loi b cha1.1Khi nim v b cha B cha l mt cng trnh xy dng nhm mc ch phc v cho cng tc tng tr cc sn phm du (xng, du ho), kh ho lng, nc, axt, cn cng nghip Hin nay cng vi s tin b ca khoa hc k thut v yu cu v mt cng ngh, ngi ta tin hnh nghin cu v xy dng cc loi b cha c cu trc phc tp nhng hp l hn v mt kt cu gp phn em li hiu qu kinh t cao. 1.2Phn loi b cha Phn loi theo hnh dng b: - B cha hnh tr (tr ng, tr ngang); - B hnh cu; - Hnh git ncV tr ca b trong khng gian c th t cao hn mt t (trn gi ta), t trn mt t , ngm hoc na ngm di t hoc di nc. Phn loi theo mi b: - B cha c th tch khng i (mi tnh - c nh). - B cha c th tch thay i (mi phao ngoi mi c nh cn c phao ni trn mt cht lng; hoc mi ni - bn thn l mi phao) Phn loi theo p lc d (p lc do cht lng bay hi): - B cha p lc thp: khi p lc d pd 0,002MPa v p lc chn khng (khi x ht cht lng) po 0,00025Mpa (0,0025 kG/cm2).- B cha tr ng p lc cao: khi p lc d pd > 0,002MPa. 1.2.1B cha tr ng p lc thp B cha tr ng mi tnh thng cha cc sn phm du m c hi n hi p lc thp.Thtchcthrtkhcnhau,t100n20000m3(chaxng),thmchti50000m3 (cha du mazt,) BI GING MN HC: B CHA DU KH 2 Hnh 1: B cha tr ng p lc thp Cc b phn chnh ca b: - y b: c t trn nn ct m cht v chu p lc cht lng. y b gm cc thp tm c kch thc ly theo nh hnh sn xut v c lin kt vi nhau bng ng hn. - Thn b: L b phn chu lc chnh, gm nhiu khoang thp tm hn li, chiu dy cc thptmthnbcththayihockhngdctheothnhb.Linktgiaccthptm trongcngmtonthnlnghniu,linktgiacconthndngnghn vng hoc i u. Ni thn b v y b dng ng hn gc -Mib:Mibcngcthptcctmthphnliviccdngchnhnhsau: Mi nn, mi treo, mi cu, mi tr cu. M TRU CU M NN M TREO M CUCT CT Hnh 2: Mt s dng mi b cha tr ng p lc thp B cha tr ng mi nn. BI GING MN HC: B CHA DU KH 3ThngsdngkhithtchbV