泵站設(shè)計關(guān)鍵ppt課件-展示頁
2025-01-24 00:01本頁面
【正文】 rmation collection 相關(guān)信息收集 Elevation of ground, inlet and discharge 地面、進出水管標高 Confirm effective Volume 確定有效容積 Confirm stop level 確定停泵水位 Confirm start/stop number 確定啟動次數(shù) Confirm distance between start and stop level 確定啟停液位距離 Tank diameter 井筒直徑 G r u n d f o s F L O W T H I N K I N G4 Sizing of wastewater pumping station 污廢水泵站尺寸 Minimum volume 最小容積 Effective volume 有效容積 ?1 ?2 ?3 ?4 Ground level 地面標高 ?5 ?6 Top cover頂蓋 Discharge port出水端 Alarm level 報警液位 Inlet port 進水端 Start level 啟動液位 Bottom底部 Stop level停泵液位 G r u n d f o s F L O W T H I N K I N G5 ? The depth of the minimum volume must be high enough to avoid the pump sucking air ? 最小容積高度應(yīng)該避免水泵吸入空氣 ? Direct fall from the inlet should be minimized to avoid air in the pump ? 進水管跌水高度最小化，避免水泵吸入空氣 ? Maximum velocity of water intake : 1,2 m/s ? 最大入流流速 1,2 m/s ? Inclined bottom (45 176。 to 60176。 to 60176。 – To long a distance may cause sedimentations and risk for clogging due to long stay time in the pit – 距離太遠，水泵運行周期過長，增加了沉淀和堵塞的風險 ? The right distance will give the optimal tank size ? 正確的啟停液位距離是池型優(yōu)化設(shè)計的關(guān)鍵 G r u n d f o s F L O W T H I N K I N G11 ? T = Pumping cycle period ? 水泵運行周期 ? Ts = Stopping period ? 停泵周期 ? Tp = Pumping period ? 泵送周期 ? T=Tp+Ts ?2 – Calculating the effective volume – theory 有效容積計算－原理 6T T Tp Ts Start Stop ? Zmax = maximum number of startstop /hour ? 每小時 最大啟停次數(shù) ? = minimum cycle period [h] = T ? 最小運行周期 max1ZG r u n d f o s F L O W T H I N K I N G12 Qww/Qp Pumping period Tp 泵送周期 Stopping period Ts 停泵周期 Cycle period Tp + Ts 運行周期 If Qww= pump capacity = 1 then: 如果 Qww= 泵送流量 = 1 ，那么 Pumping time TP = infinite 泵送時間 TP= 無限大 Stopping time TS = 0 停泵時間 TS = 0 If Qww= 0 then: 如果 Qww= 0 ，那么 pumping time TP = 0 泵送時間 TP = 0 Stopping time TS = infinity 停泵時間 TS = 無限大 Minimum cycle period = 最小運行周期 ?2 – Calculating the effective volume – theory 有效容積計算－原理 When Qww /Qp = 0,5 then Tp =Ts : 當 Qww /Qp = 0,5 時， Tp =Ts : the number of start/stop is maximum and the cycle time is minimum 啟停次數(shù)最大，運行周期最短 0 0,5 1 T = = Tp Ts max1ZG r u n d f o s F L O W T H I N K I N G13 ?2 – Calculating the effective volume – theory 有效容積計算－原理 When calculating the distance between start and stop (Heff), we need to know: 計算啟停液位距離 (Heff)，需要知道 ?Pump capacity Qp [m3/h] ?水泵的運行流量 ?Ining flow Qww
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