pumping Stations Design Lecture 6

1 Dr. Fahid Rabah , PE pumping Stations DesignFor Infrastructure Master ProgramEngineering Faculty-IUGDr. Fahid RabahWater and environment 6: Design of water supply pumping stationsDr. Fahid Rabah , PE Lecture 6: Design of waster supply pumping General introduction Main Types of water pumping Stations :1. Wells pumping stations2. Distribution pumping stations3. Booster pumping stations4. Surface water pumping Stations Dr. Fahid Rabah , PE Lecture 6: Design of waster supply pumping Well pumping Stations Main components of well pumping Stations :1. Multi stage pumps ( connected in series) 2. Suction shaft (pipe)3.

2 Vertical motor ( above ground or submerged)4. Delivery pipe5. Valves6. Cyclone 7. Surge vessel (air champer for water hammer protection)8. Chlorination tank and chlorine injection Stand by generator and its fuel electricity distribution panel and Fahid Rabah , PE PUMP ''? SCH 404''? HOLLOW SHAFT ELECTRIC MOTOR400V,50HZ,1450 RPMCAST IRAN ( CI )DISCHARGE HEAD STAINLESS STEEL DRIVE SHAFTWATER COOLED RUBBER BEARING+ BRONZE LINER+ BRONZE IMPELLERSCAST IRAN FLANGED CONNECTED Well pumping stationsMulti stage pumps connected in series with a dry installation vertical motorDr. Fahid Rabah , PE Well pumping stationsMulti stage pumps connected in series with dry or submersible motorDr.

3 Fahid Rabah , PE Well pumping stationsMulti stage pumps connected in series with diesel motorDr. Fahid Rabah , PE Well pumping stationsMulti stage pumps connected in series> submersible motorDr. Fahid Rabah , PE Vertical dry motor Well pumping stationsDr. Fahid Rabah , PE Submersible type motor Well pumping stationsDr. Fahid Rabah , PE Air release valveHydro-CycloneButter fly valveSuction PipeFlow meterMotorPressure GageChlorine injectionTypical piping and valves arrangement for well pumping Well pumping stationsDr. Fahid Rabah , PE Hydro CycloneCoolingTank500 literchlorineTank Dosing Pump1323533 Pump well Delivery pipe Butterfly valve Check valve Flow meter 124354 Well room Typical layout Well pumping stationsDr.

4 Fahid Rabah , PE Delivery pipe , see the Hydro Cyclones and Well pumping stationsDr. Fahid Rabah , PE Hydro Cyclone Well pumping stationsDr. Fahid Rabah , PE Delivery pipe , see the Hydro Cyclones and Well pumping stationsDr. Fahid Rabah , PE Standby Well pumping stationsDr. Fahid Rabah , PE Fuel tank for the standby Well pumping stationsDr. Fahid Rabah , PE Water tankChlorine tankChlorine pumpChlorine tank and chlorine injection Well pumping stationsDr. Fahid Rabah , PE chlorine injection point to the delivery Well pumping stationsDr. Fahid Rabah , PE Delivery pipe , see the Hydro Cyclone , valves, fuel tank, service Well pumping stationsDr.

5 Fahid Rabah , PE Delivery pipe , Hydro Cyclone , valves, fuel tank, Well pumping stationsDr. Fahid Rabah , PE Well pumping stationsDr. Fahid Rabah , PE Well pumping stationsDr. Fahid Rabah , PE Well pumping Stations Types of well pumping Stations pumping from well pumps to the distribution system Most of Gaza wells are from this type Not recommended for long distribution systems and for cases where more than one well pumping directly into the system. This system has two problems: back pressure between wells and lower discharge from each individual well. 2. pumping from well pumps to a storage or distribution tank.

6 This system is recommended and there is a trend in Gaza to use this system This system solves the problem of back pressure associated with the direct pumping discussed above. It also increase the pumping efficiency from each pump (lower head losses leading to more flat system curve and consequently more discharge)Dr. Fahid Rabah , PE Well pumping stationsWell pumping station discharginginto a storage tank Dr. Fahid Rabah , PE Well pumping stationsNote that for well pumps there is only one valid pump curve which is thecurve of the total pumps in pumping station are operated in seriesDr. Fahid Rabah , PE Lecture 6: Design of waster supply pumping Distribution pumping Stations Main components of distribution pumping Stations :1.

7 Dry pumps ( connected in parallel) 2. Suction shaft (pipe)3. Storage and distribution tank4. Delivery pipe5. Valves6. Surge vessel (air champer for water hammer protection)7. Chlorination tank and chlorine injection Stand by generator and its fuel tank9. Main electricity distribution panel and Fahid Rabah , PE Lecture 6: Design of waster supply pumping Distribution pumping Stations Typical layout of distribution pumping Stations :Storage andDistributionTank13241 Distribution pumping station with rectangular storage and distribution tank 1. Gate valve2. Pump3. Check valve4. Manifold Dr. Fahid Rabah , PE Lecture 6: Design of waster supply pumping Distribution pumping Stations Typical layout of distribution pumping Stations :51321 Storage andDistributionTank4 Distribution pumping station with circular storage and distribution tank 1.

8 Gate valve2. Pump3. Check valve4. Manifold 5. Feeding HeaderDr. Fahid Rabah , PE 6. Design of water supply pumping stationsDistribution pumping stationDr. Fahid Rabah , PE Distribution pumping stationsDistribution pumping station are operated in parallelDr. Fahid Rabah , PE Distribution pumping Stations control of distribution pumping Stations switch at the discharge side of the the pressure in the network increases above a preset value (for example 6 bar) the pumps will be shut down one after the other. The pressure on the delivery pipe increases at low demands when many connections are switch connected to the water distribution tank.

9 If the level in the water distribution tank drops to the a pre assigned minimum level the pumps are shut off one after the other with a pre assigned intervals. The pumps will be started again one after the other when the water in the tank reaches a pre assigned level. An ultra>sound level detector is usually used for level 6: Design of waster supply pumping stationsDr. Fahid Rabah , PE Lecture 6: Design of waster supply pumping Booster pumping Stations Main components of booster pumping Stations :1. Dry pumps ( connected in series) 2. Suction connection (pipe)3. Delivery pipe4. Valves5. Stand by generator and its fuel tank (for offline large Stations only)6.

10 Main electricity distribution panel and control7. Service building (for offline large Stations only).Dr. Fahid Rabah , PE Lecture 6: Design of waster supply pumping Booster pumping Stations Main types of booster pumping Stations :1. Inline booster pumps 2. Offline booster pumpsDr. Fahid Rabah , PE Typical inline Booster Pump Booster pumping stationsLecture 6: Design of waster supply pumping stationsDr. Fahid Rabah , PE Inline Package Booster Booster pumping stationsLecture 6: Design of waster supply pumping stationsDr. Fahid Rabah , PE Lecture 6: Design of waster supply pumping Booster pumping Stations Typical layouts of inline booster pumping Stations :Inline booster pumping station > two pumps in seriesThis layouts is used when two or three pumps are able to deliver the required flow and head.