NGO S SEMINAR BOREHOLE PUMPS

Transcription

1 NGO S SEMINAR BOREHOLE PUMPS 1

2 Static Water Level Water level before Pumping (SWL) Dynamic water Level Stable water level after 24hr test pumping (PWL) Draw down PWL - SWL TYPICAL BOREHOLE 2

3 BOREHOLE SURVEY DATA Borehole details Depth SWL Casing PWL Test Yield Flow Casing profile drawing Surface details Distance to delivery Pipe size & Material Elevation Power Supply Source: Mains Single or three Phase Generator Size Distances of: Power pt Panel Borehole - Panel 3

4 TEST PUMPING Well log should contain the result of a pumping test of at least 48-72hrs depending on PWL stability Over 24hrs, the PWL should be constant Low risk of over pumping Problems of Over Pumping Risk of dry running Risk of sand penetration and siltation Lowering of the PWL higher operating costs Deep draw down casing oxidation to form ochre which may clog well screen and pump Permanent lowering of aquifer levels chemical changes and heavy metal precipitation, infiltration of nitrates and pesticides resulting in pollution of the aquifer Most common cause of over pumping is increased water consumption, covered by increased pump capacity or longer duty of borehole pumps without increasing number of wells and catchment area 4

5 PUMP POSITIONING Submersible pumps are cooled by circulation of the pumped water around the motor Effective circulation and convection is achieved if the pump is located in a plain casing above the main aquifer Motor cooling is key to its life pump position affects motor life Water temperature also affects motor life due to its effect on cooling When cooling conditions are not ideal Industrial motors Cooling Sleeve Derating of motors 5

6 BOREHOLE INSTALLATION (Hs) 6

7 BOREHOLE EQUIPMENT 7

8 BOREHOLE PUMPS Grundfos SP Dayliff DS Grundfos SQ Dayliff Nastec Dayliff D3SP1/ DSP Tesla Grundfos Lorentz Idea/MicraSQFlex PS/PSK 8

9 GRUNDFOS SP/DAYLIFF DS Multistage submersible pumps for installation with 4 & 6 diameters Clean thin non-aggressive liquids without components or fibres Entire pump Stainless Steel with water lubricated rubber bearings Handle sand content upto 50mg/l, where the pump efficiency will remain acceptable for up to 35,000 duty hrs Type Keys: SP3A 45 DS 3/45 9

10 GRUNDFOS SQ Electronically controlled high speed pump, 10,700rpm Both Stainless steel and composite material Electronic motor controller with Dry run protection No electrodes Soft Start design avoiding water hammer Over/Under Voltage protection Overload and high temperature protection No need for control panel cutting down installation cost Not repairable except replacement of impellers 3 pump fits in 80mm boreholes 10

11 TESLA IDEA/MICRA IDEA Peripheral pumps Compact design Supplied with 10m cable Connected directly to the mains using 10A MCB MICRA Centrifugal pump Compact design Motors fitted with thermal overload Separate controller with a start capacitor should be provided separately 11

12 DAYLIFF D3SP1 / DSP D3SP1 plastic impellers, 20m cable, 2 sizes, control included DSP Multistage submersible pumps 4 pump Clean thin non-aggressive liquids without components or fibres Floating impellers & Stainless Steel inlet/outlet chamber, casing Excellent sand handling capacity Supplied c/w with a control box Four models available Type Keys: DSP

13 CONTROL PANELS Provides protection and reliable controls for all electric pumps. Panels can be customized to suit customer requirement. Single Pump control Two pump control Multiple pump control

14 DAYLIFF DRYTEK Electronic pump controllers Fault and parameter setting done using push buttons Sizes up to 15kW (DOL) Digital display Incorporated PFR in 3~ panels Auto restart for fault signals 14

15 GRUNDFOS MP 204 UNIT Protects Against Dry running Overload Closed valve or frozen discharge Insufficient liquid circulation past the motor Too high temperature of Pumped liquid Deposits on the motor Over/Under Voltage Phase Asymmetry Motor Overheating Incipient motor failure 15

16 MP 204 WITH R100 Remote control R100 for wireless communication with MP204 uses infra red light Used for setting and resetting warning and stop limits of various operation parameters To check status displays MP 204 keeps a record of the last five faults recorded When communication with MP 204 is established motor Temperature flashes 16

17 DAYLIFF PVC BOREHOLE PIPES Traditional GI pipes PVC Stand Pipes Sizes available:- 1 ¼ 1 ½ 2 2 ½ 17

18 BENEFITS PVC PIPES Strong Non-corroding PVC, Long Life Deep Square Threads Strength Rubber Joint easy coupling and sure seal Smooth surface finish reduced hydraulic friction losses, better pump efficiency Light and easy to handle in 3m lengths Suitable for water temperature 70 deg C Economical to buy and install 18

19 INSTALLATION SUNDRIES BOREHOLE COVER JUNCTION BOX ISOLATING VALVE LEVEL FLOAT SWITCH 19

20 Any closing Question? 20