絮凝池設(shè)計(jì)(作業(yè))

1、精選優(yōu)質(zhì)文檔-傾情為你奉上設(shè)計(jì)某水廠的絮凝池，已知水量Q=70000m3/d=2917m3/h 1、用往復(fù)式隔板絮凝池2、選用數(shù)據(jù)：（1）廊道內(nèi)流速采用六檔: v1=o.5m/s,v2=o.4m/s,v3=0.35m/s,v4=o.3m/s,v5=o.25m/sv6=o.2m/s.（2）絮凝時(shí)間：T=20min（3）池內(nèi)平均水深：H1=2m（4）超高：H2=0.3m（5）池?cái)?shù)：n=2個(gè)3、計(jì)算 總?cè)莘e W=QT/60=2917×20/60=972m3F=W/( n×H1)=972/(2×2)=243m2設(shè)池子寬度:B=20m池子長(zhǎng)度：L=243/20=12.15m

2、隔板間距按廊道流速不同分成六檔:a1=Q/(3600×n×V1×H1)=2917/(3600×2×0.5×2)=0.405m取 a1=0.405m 則實(shí)際流速：V1=0.46m/s取a2=0.65 則實(shí)際流速：V2=0.42m/s按上法計(jì)算得：a3=0.75m, V3=0.37m/sa4 =0.9m, V4=0.3m/sa5=1.1m, V5=0.25m/sa6=1.35m,V6=0.2m/s每一種間隔采取3條，則廊道總數(shù)為18條，水流轉(zhuǎn)彎次數(shù)為17次，則池子長(zhǎng)度L=3(a1+a2+a3+a4+a5+a6)=3(0.6+0.65+0.

3、75+0.9+1.1+1.35)=16.05m隔板厚按0.2m計(jì)， 則池子總長(zhǎng)L=16.05+0.2×（18-1）=19.45m按廊道內(nèi)的不同流速分成六段，分別計(jì)算水頭損失:第一段：水力半徑R1=a1×H1/（a1+2H1）=0.6×2/(0.6+2×2)=0.26m槽壁粗糙系數(shù) n=0.013流速系數(shù)Cn=1/n×Rny1 Y1=0.149故C1= Rny1/n=62.9第一段廊道長(zhǎng)度:l1=3B=3×20=60m第一段水流轉(zhuǎn)彎次數(shù)S2=3則絮凝池第一段水頭損失為h1=0.073m各段水頭損失計(jì)算結(jié)果段數(shù)MiIiRiV0viciCi2hi13600.260.400.4762.93956.410.07323600.300.3840.4264.14108.810.06733600.330.320.3765.24251.040.04743600.400.252O.367.34529.290.02953600.440.2170.2568.24651.240.02162400.530.1870.270.14914.010.016 H總=0.253m 求得 G=45sGT值計(jì)算 取T為20minGT=45×2