轻液层 Co2purdr=20(-h) 重液层 →与-=P(过于简单,强调了堰的作用) r Ph 讨论题 已知:ps=2300kg/m3p=0674kg/m3Vs=1000m3/hu=3.6×105PaS 标准式D=04m→h=0.2m,B=0.1m 1000/3600 0.1×0213.89m/s 9 =/.y×36×103×0. 8.0351m 丌·N·1p 14×5×13.89×2300 d30=022/D 4>.73my=82x,4062138950 <33-55-1010-2020-3030-4040-5050-60>60 27129.575646.6 ni(=d/d)23.5%24.78%87.12%100%100%1009%100%100%100% 7=∑xn=864%=(cx-cm)c 2004g/m3 3、由ηo中各η;核算,若no=90%, 5段颗粒n;约为40%,0.4=(ddc)2→d约6.32um 若△p不变,即u不变:√B/B'=d/d,B'=0062m 取D=0.24m,B=0.06m,h=0.12m 当2=13:89m/时,V=13.89×006×0.12=360m3/h 取N=3 1000/3/3600 =12.86m/s 0.06×0.12 d/d=√lB/B=389×0061286×01=0805 ∴dC=6.49m 5.34%380%100% n=90.34% D=0.24m,N=344 轻液层: ( ) 2 1 2 2 2 2 2 1 2 r L L r rdr r r     = −  重液层: ( ) 2 4 2 2 2 2 2 4 2 r h H r rdr r r     = −  2 2 2 4 2 2 2 1 L h r r r r   −  = − （过于简单，强调了堰的作用） 讨论题： 4－8 已知: ρS=2300kg/m3 ρ=0.674kg/m3 VS=1000m3 /h μ=3.6×10-5Pa·S 标准式 D m h m B m =  = = 0.4 0.2 , 0.1 1、 1000 / 3600 13.89 / 0.1 0.2 i u m s = =  5 9 9 3.6 10 0.1 8.035 3.14 5 13.89 2300 C i S B d m N u     −    = = =      50 0.27 5.73 S i D d m u    = = 2 2 8 4 0.674 13.89 520 2 ui p Pa   = =   = 2、 <3 3-5 5-10 10-20 20-30 30-40 40-50 50-60 >60 3 11 17 27 12 9.5 7.5 6.4 6.6 ηi(=di/dC) 2 3.5% 24.78% 87.12% 100% 100% 100% 100% 100% 100%   o i i =  = x 86.64% 3 ( ) / , 20.04 / o  = − = c c c g m 入 出 出 c 3、由ηO 中各ηi 核算，若ηO = 90%， 3~5 段颗粒ηi 约为 40%，0.4=(di/dC) 2→dc约 6.32m 若Δp 不变，即 ui 不变： B B d d B m / ' / , 0.062 C = =   取 D=0.24m，B=0.06m，h=0.12m 当 3 13.89 / , 13.89 0.06 0.12 360 / u m s V m h i S = =   = 时 取 N=3 1000 / 3/ 3600 12.86 / 0.06 0.12 u m s i = =  d d u B u B C C i i    / / 13.89 0.06/12.86 0.1 0.805 = =   =  = d m C  6.49 <3 3～5 >5 5.34% 38.0% 100% →η=90.34% ∴ D=0.24m，N=3