斜管沉淀池設(shè)計(jì)計(jì)算excel

1、斜管沉淀池設(shè)計(jì)計(jì)算,1.已知條件：,進(jìn)水量Q=,5,萬噸/天,=,0.579 ,m3/s,自用水系數(shù)=,5,%,則進(jìn)水量Q=,0.608 ,m3/s,=,2187.50 ,m3/h,設(shè)計(jì)斜管沉淀池座數(shù)為2座,單座Q1=,0.304 ,m3/s,=,1093.75,m3/h,清水區(qū)上升流速=,1.3,mm/s,取顆粒沉降速度=,0.3,mm/s,取SS與NTU相關(guān)系數(shù)為,1.2,進(jìn)水NTU=,50,=,60,mg/L,出水NTU=,3,=,3.6,mg/L,采用塑料片熱壓六邊形蜂窩管,管厚=,0.4,mm,邊距=,35,mm,水平傾角=,60,2.單池計(jì)算,a.清水區(qū)面積,A=,233.71 ,

2、m2,其中斜管結(jié)構(gòu)占用面積按3%計(jì),則實(shí)際清水區(qū)面積A=,240.72 ,m2,取池寬B=,12,m,則池長(zhǎng)L=,20.06 ,m,取L=,20.50 ,m,在滿足配水均勻條件下，使進(jìn)水沿池寬方向布置,b.斜管長(zhǎng)度L,管內(nèi)流速V0=,1.50 ,mm/s,斜管長(zhǎng)度L=,405.22 ,mm,考慮管端紊流積泥，過渡區(qū)管長(zhǎng)采用,250,mm,則斜管總長(zhǎng)L=,655.22 ,mm,取L=,800,mm,c.排泥計(jì)算,每日沉淀池干污泥量G=,1.481 ,t,取污泥含水率=,98,%,取污泥密度=,1.03,t/m3,每日沉淀池濕污泥體積V濕=,71.87 ,m3,設(shè)計(jì)每天排泥6次，則每隔4小時(shí)刮泥一

3、次,則每次排泥量V=,11.98 ,m3,取V=,12.0 ,m3,于進(jìn)水端設(shè)置兩座污泥斗,單斗排泥量V單=,6.0 ,m3,取泥斗下底面面積F1=,0.6,m2,泥斗上底面面積F2=,5.0 ,m2,泥斗高h(yuǎn)1=,2.5 ,m2,則泥斗貯泥部分體積V1=,6.11 ,m3,大于單斗排泥量,6.0 ,滿足排泥要求,采用雙鋼絲繩牽引刮泥機(jī)，卷?yè)P(yáng)機(jī)平臺(tái)置于沉淀池中部,取刮泥板高h(yuǎn)2=,0.1,m,刮泥板寬b2=,6.0 ,m,刮泥板行進(jìn)速度V2=,1.0 ,m/min,兩臺(tái)刮泥機(jī)一個(gè)工作循環(huán)刮泥量V刮=,1.37 ,m3,刮泥機(jī)一個(gè)工作循環(huán)所需時(shí)間T刮=,41.00 ,min,取排泥管直徑d=,200,mm,取排泥時(shí)間t排=,1.5,h,則排泥流速V泥=,0.04 ,m/s,d.沉淀池高度,采用保護(hù)高h(yuǎn)保=,0.3,m,清水區(qū)高h(yuǎn)清=,1.2,m,布水區(qū)高h(yuǎn)布=,1.5,m,污泥斗高h(yuǎn)斗=,2.5 ,m,斜管高,0.69 ,m,沉淀池總高H=,6.19 ,m,e.復(fù)核Re及沉淀時(shí)間T,水力半徑R=,8.75,mm,=,0.875,cm,管內(nèi)流速V0=,0.15 ,cm/s,取運(yùn)動(dòng)黏度