泵站設(shè)計關(guān)鍵ppt課件(編輯修改稿)
2025-02-11 00:01 本頁面
【文章內(nèi)容簡介】 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 [m3/h] ?入流流量 ?Pit diameter [mm] ?泵坑直徑 pe f fwwe f f5,0s QVQVT???? ? pe f fwwp e f f 5,01p QV VT ?????Calculating the minimum start and stop period 計算最小啟停周期 PSm in TTT ??[l / s ] [l ][s ][s ][l ] [l / s ]QVTTVQ ???? ? pe f fpe f fm in 5,015,0 QVQVT ?????pe f fpe f fpe f fm i n422QVQVQVT ??????H eff G r u n d f o s F L O W T H I N K I N G14 Monogram for the determination of the accumulated volume between start and stop (Veff) pe f fm in4QVT ?? m a xm inE f f 44 ZTV pp ????Calculating the effective volume 計算有效容積 3E f f e c t i v eE f f e c t i v e 2 [ m ] [ m ]Su r f a c e a r e a [ m ]VH ??2 – Calculating the effective volume – theory 有效容積計算－原理 Calculating the height between start and stop level 計算啟停液位距離 G r u n d f o s F L O W T H I N K I N G15 For two pumps in alternating operation 對于雙泵交替運行 Note : 說明： ?Only one pump is taken into account for the calculation, the pumps alternate between duty and standby position with each running cycle. ?當(dāng)有效容積計算時只考慮一臺泵，雙泵按運行周期交替運行 ?The pumps are calculated for the peak flow ?水泵流量按照峰值流量計算 ?In case of very small ining flow, the velocity in the raising main must be high enough to prevent sedimentation. ?當(dāng)流量非常小時，上升管的流速必須足夠大以避免沉淀 2 pumps in alternating operation where Qin QPump 當(dāng) Qin QPump， 2臺泵交替運行 ?Pump A ?Pump B TP TS TP TS A A B ?2 – Calculating the effective volume – theory 有效容積計算－原理 m axE f f 4 ZQV p??G r u n d f o s F L O W T H I N K I N G16 2 pumps in alternating operation where Qin QPump 當(dāng) Qin QPump， 2臺泵交替運行 ?Pump A ?Pump B TP TS TP A A B B A TS TP Note : 說明： ?If the ining flow exceed the capacity of the duty pump, the pump in standby position will start and 2 pumps are operating in parallel. ?如果入流流量超過工作水泵流量，備用水泵啟動， 雙泵并聯(lián)運行 ? the pumps can be calculated for the ining flow≤peak flow. If one pump fails, the wastewater level in the pit can raise. ?可以按照入流流量 ≤峰值流量計算水泵流量，如果 一臺泵故障，允許泵站水位升高 ?2 – Calculating the effective volume – theory 有效容積計算－原理 m axE f f 4 ZQV
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