重力式無(wú)閥濾池

1.已知條件,,,,

,凈水水量（m3/h）,,120,

,設(shè)計(jì)水量（m3/h）,Q,125,

2.設(shè)計(jì)數(shù)據(jù),,,,

,濾速（m/h),v,10,

,平均沖洗強(qiáng)度（L/s/m2）,q,15,

,沖洗時(shí)間（s）,,240,

,期終允許水頭損失（m）,,1.7,

,排水井堰口標(biāo)高（m）,,-0.7,

,濾池入土深度（m）,,-0.5,

3.計(jì)算,,,,

（1）濾池面積,所需過濾面積（m2）,f1,12.5,

,以0.35m腰長(zhǎng)直角三角形連通管面積(m2),f2^,0.1071845,

,所需濾池總面積（m2）,f,12.908738,

,正方形濾池邊長(zhǎng)（m）,l,3.592873223,

,邊長(zhǎng)取值（m）,L,3.6,

,實(shí)際過濾面積,F,12.531262,

（2）濾池高度,底部集水區(qū)高度（m）,,0.4,

,濾板厚度（m）,,0.12,

,承托層厚度（m）,,0.1,

,濾料層厚度（m）,,0.7,

,渾水區(qū)高度（m）,,0.38,

,頂蓋高度（m）,,0.4,

,沖洗水箱高度（m）,,1.85,

,超高,,0.15,

,濾池總高（m）,,4.1,

（3）進(jìn)水分配箱,流速（m/s）,vf,0.05,

,面積（m2）,Af,0.693333333,

,采用分配箱的形狀,,,

（4）進(jìn)水管,選用管徑（mm）,,250,

,對(duì)應(yīng)的流速（m/s）,,0.706223534,

,水力坡降i,,0.00364,

,管長(zhǎng)（m）l,,15,

,進(jìn)水管沿程水頭損失,hf,0.0546,

,進(jìn)水管沿程水頭損失,hj,0.096598185,

,總水頭損失,h,0.151198185,

4.控制標(biāo)高,濾池出水口標(biāo)高,,3.45,

,虹吸輔助管管口標(biāo)高,,5.15,

,進(jìn)水分配箱箱底標(biāo)高,,4.65,

,進(jìn)水分配箱堰頂標(biāo)高,,5.45,

"5.虹吸管管徑

（采用反算法）",,,,

,反沖洗流量（L/s）,,187.96893,

,沖洗過程不斷進(jìn)水（L/s）,,34.66666667,

,虹吸管流量（L/s）,,222.6355967,

假定（上升管）,虹吸上升管管徑（mm）,,350,

,上升管斷面面積（mm2）,,96211.27502,

,管內(nèi)流速（m/s）,,1.953709999,2.314028129

,對(duì)應(yīng)的水力坡降,,0.0205,

,管長(zhǎng)（m）,,6,

（下降管）,虹吸管下降管管徑（mm）,,300,

,下降管斷面面積（mm2）,,70685.83471,

,下降管管內(nèi)流速（m/s）,,3.149649397,

,對(duì)應(yīng)的水力坡降,,0.046,

,管長(zhǎng)（m）,,6,

（三角形連通管）,管內(nèi)流速（m/s）,,0.767220122,

,對(duì)應(yīng)的水力坡降,,0.00719,

,管長(zhǎng)（m）,,1.6,

"水頭損失

（從水箱到排水井）",,,,

沿程水頭損失Hf,連通管,,0.011504,

,上升管,,0.123,

,下降管,,0.276,

,總沿程水頭損失,,0.410504,

局部水頭損失Hj,連通管的進(jìn)口與出口,,0.045002043,

,擋水板,,0.05,

,虹吸管進(jìn)口,,0.097272751,

,三通,,0.027292182,

,彎頭,,0.682304559,

,縮管,,0.126405343,

,出口,,0.505621372,

,總水頭損失,,1.533898251,

小阻力配水系統(tǒng)及濾層水頭損失hs,濾板水頭損失,,0.3,

,濾料層及承托層水頭損失