泵站設(shè)計(jì)關(guān)鍵ppt課件-在線瀏覽
2025-03-04 00:01本頁(yè)面
【正文】 [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(jì)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(jì)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(jì)算－原理 Calculating the height between start and stop level 計(jì)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(duì)于雙泵交替運(yùn)行 Note : 說(shuō)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(jì)算時(shí)只考慮一臺(tái)泵，雙泵按運(yùn)行周期交替運(yùn)行 ?The pumps are calculated for the peak flow ?水泵流量按照峰值流量計(jì)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(shí)，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(tái)泵交替運(yùn)行 ?Pump A ?Pump B TP TS TP TS A A B ?2 – Calculating the effective volume – theory 有效容積計(jì)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(tái)泵交替運(yùn)行 ?Pump A ?Pump B TP TS TP A A B B A TS TP Note : 說(shuō)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(guò)工作水泵流量，備用水泵啟動(dòng)， 雙泵并聯(lián)運(yùn)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(jì)算水泵流量，如果 一臺(tái)泵故障，允許泵站水位升高 ?2 – Calculating the effective volume – theory 有效容積計(jì)算－原理 m axE f f 4 ZQV p??For two pumps in alternating operation 對(duì)于雙泵交替運(yùn)行 G r u n d f o s F L O W T H I N K I N G17 Pumping stations with more than two pumps : 超過(guò)兩臺(tái)泵的泵站 ?The effective volume can be reduced when the pumps are working in parallel and assume alternately the position of duty and standby with each running cycle : ?水泵并聯(lián)運(yùn)行，按運(yùn)行周期交替運(yùn)行，有效容積減小 n = number of pumps excluding the spare
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