普通快濾池EXCEL計算表

普通快濾池適用于大中小型水廠，單池面積不宜大于100平方米，濾料的粒徑較大,,,,,,,,,,,,,,,,,,,,,

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設(shè)計流量（m3/d）Q=,105000,,,,,,,,,,,,,,,,,,,,

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設(shè)計濾速（m/h）v,10,,,,,,,,,,,,,,,,,,,,

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,,,,,,,,,,,,備注,,,,洗砂排水槽,,,,,

,,,,,,備注,進出水系統(tǒng),,,最大濾料粒徑的最小流態(tài)化流速vmf,,,反沖洗干管流量qg=,,,洗砂排水槽中心距a0=L/n1,2.25,,單個濾池反沖洗用水總量W=q·f·t/1000,272.16,

濾池總面積：F,,,,濾池高度：H,,,進水總渠渠寬B1,1.2,,vmf=100*12.26*d^1.31*m0^2.31/Φ^1.31*μ^0.54*(1-m0)^0.54,1.08,,qg=f·q(L/s),756,,每側(cè)洗砂排水槽數(shù)n1,4,,沖洗時間t（min）,6.00,

F=Q/(vT),441.18,,,H=H1+H2+H3+H4,3.20,,進水總渠渠水深,1,,最大濾料粒徑d（m）,0.0012,,反沖洗干管直徑D（mm）,1000,,每條洗砂排水槽長度L0=(B-b)/2,2.6,,,,

實際工作時間（h）T=T0-nt0-nt1,23.8,,,承托層高度H1（m）,0.4,,進水總渠渠流速v1(m/s),1.01,,濾料的孔隙率m0,0.38,,干管始端流速vg(m/s),0.96,,中間排水槽寬度b,0.8,,反沖洗干管道水頭損失hw1（m）,1.00,

濾池每日工作時間T0=,24,,,濾料層高度H2（m）,0.7,,單個濾池進水管流量Q2,0.152,,球度系數(shù)Φ,0.98,,配水支管根數(shù)nj,,,每條洗砂排水槽的排水量q0=qg/n2,94.5,,配水系統(tǒng)水頭損失hw2=hk（m）,0.03,

濾池沖洗后停用和排放初期雨水的時間（h）t0=,0,,,濾層上水深H3（m）,1.8,可取1.5~2.0m,進水管管徑D2（mm）,500,,水的動力粘度μ【（N·s)/m2】,0.001,,nj=2*L/a,60,,洗砂排水槽總數(shù)n2,8,,承托層水頭損失hw3（m）,0.12,

濾池每日沖洗時間t1=,0.1,,,超高H4（m）,0.3,可取0.3~0.5m,管中流速v2(m/s),0.77,,,,,支管中心間距（m）,0.3,一般采用0.25~0.30(m),洗砂排水槽斷面模數(shù)x=（1/2）*（q0/(1000*v0))^1/2,0.20,,濾層水頭損失hw4（m）=(ρ砂/ρ水-1)*(1-m0)*H2,0.68,

濾池每日沖洗次數(shù)n=,2,,,,,,反沖洗進水管管徑D3（mm）,500,,反沖洗強度q【（L/（s·m2）】,,,單根支管入口流量qj=qg/nj(L/s),12.6,,洗砂排水槽槽中流速v0,0.6,,沖洗安全水頭hw5（m）,1.50,一般采用1.5m~2.0m

,,,,,,,反沖洗進水管流速v3(m/s),1.93,,q=10*K*vmf,14,,支管入口流速vj(m/s),1.61,,洗砂排水槽距離砂面高度He=eH2+2.5x+δ+c,0.626078371,,,,

濾池單池面積f',,,,,,,單個濾池清水管管徑（mm）,500,,安全系數(shù)K,1.3,一般采用1.1~1.3,支管管徑Dj（mm）,100,,砂層最大膨脹率e,39.00%,30%~50%,濾料的密度ρ砂（kg/m3）,2650.00,

f'=F/N,55.15,,,,,,單個濾池清水支管流速v4(m/s),0.77,,,,,支管的長度lj（m）,2.5,,排水槽底厚δ（m）,0.05,,水的密度ρ水（kg/m3）,1000.00,

濾池個數(shù)N（個）,8,個數(shù)請參考下圖,,,,,清水總管管徑（mm）,1000,,單層濾料是12~15，雙層濾料時13~16,,,配水支管上孔口總面積Fk=K*f（mm）,135000,,洗砂排水槽超高c（m）,0.08,,濾料未膨脹前的孔隙率m0,0.41,

,,,,,,,清水總管流速v5(m/s),1.55,,是否為單層粗砂級配濾料（是為0，否為1）,0,,配水支管上孔口總面積與濾池面積之比K,0.25%,一般采用0.2%~0.25%,排水槽總平面面積F0=2x*l0*n2+b*L,8.254744091,,,,

濾池寬B,,,,,,,,,,濾速驗算（對為1，錯為-1）,1,,支管上孔口流速vk=qg/Fk,5.6,一般采用5.0~6.0(m/s),中間排水渠距洗砂排水槽的高度Hc=1.73*（(qg/1000)/（g*b^2))^(1/3),0.78,,水泵吸水管/壓水管的總水頭損失,1.50,

B=f/L,6,,,,,,,,,,,,單個孔口面積fk=π*dk^2/4,63.585,,,,,排水槽頂與清水池最低水位高差H0,7.00,

濾池長度L=,9,,,,,,排水渠可與進水總渠共用,,,,,,支管上孔口直徑（mm）,9,一般采用9~12mm,,,,,,

濾池單池面積f,54,,,,,,,,,,,,孔口總數(shù)Nk=Fk/fk,2125,,,,,反沖洗揚程,11.84,

實際濾速核算V'=,10.21,,,,,,,,,,,,每根支管上孔口數(shù)nk=Nk/nj,36,,,,,反沖洗流量Q',756,

,,,,,,,,,,,,,孔口中心距ak=lj/nk/2,0.14,,,,,,,

,,,,,,,,,,,,,孔口平均水頭損失hk=（1/2g）*（q/10μK）^2（m）,0.034602076,,,,,,,

,,,,,,,,,,,,,流量系數(shù)μ（孔口直徑與壁厚之比值有關(guān)）,0.68,,,,,,,

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