-20mm Aggregate Slurry Pumping

[KBasson]

Good Day All

It would be appreciated if you could provide any assistance or insight to my application problem. I am attempting to convey a -20mm stone by means of a pumping system from the source to the process plant. The slurry will be pumped over a distance of about 1000m. I have had a reputable company look at my application and provide a solution. They have proposed running three pumps in series. I would however appreciate any comments from people that have experienced similiar applications and could possible view their concerns or problems that they might foresee.

Your comments are all highly appreciated.

Thank You
Ken

 

[macmil]

you will need tgo provide more info. eg volume or tons per hour; solids content; elevation change; density; gradation and type of stone; process considerations; etc was the reputable company a pump supplier or a consultant.?
i have seen numerous series pumping applications for slurry applications, and they work, but some better than others.

 

[KBasson]

Hi MacMil

Thanks for your response. The Technical specifications are as follows:
350 Tons/Hr.

Pipe Module Technical Report Code : PQ2003/280 SG = 1.38

Flow Rate 161.32 l/sec
Suction height 1.00 m
Discharge height 61.00 m
Discharge pressure 0.00 kPa

Pipe Section Discharge Pipe
Pipes in Parallel 1
Pipe Length 1500.0 m
Nominal Diameter 355.0 mm
Inside Diameter 257.0 mm
Pipe Material HDPE
Pipe Roughness 0.0150 mm
Pipe Fittings 2
2 LONG ELBOW, 90ø
Reynold's No 799219
Velocity 3.11 m/s
Settling Vel 2.52 m/s
Friction Loss
Fittings 0.2 m
Pipe 37.8 m
Total 38.0 m

NPSHa 7.76 m
Static head 60.00 m
Friction head 37.96 m
Total head 97.96 m

Pump Selection Technical Report

Flow rate 161.3 l/sec Static head 60.0 m
Total head 98.0 m Friction head 38.0 m
Speed Head 98.9 m

SG Solid 2.700 Solids Flow 350.50 Tonnes/hr
SG Liquid 1.000 % Solid Wt 43.7 %
SG Slurry 1.380 % Solid Vol 22.4 %
Head Ratio 0.99 D50 Size 0.0750 mm
Eff Ratio 0.99 Max Size 2.0000 mm

No of pumps 6 (Series)
Pump Model 10/8F-AH-M Supplier WARMAN
Flow rate 161.3 l/sec Power Abs 51.34 kW
Head 16.3 m Power Req 64.17 kW
Pump speed 465 RPM Motor size 75.00 kW
NPSHr 5.6 m Efficiency 69.4 %
Impeller D 686 mm BEP 69.8 %

Your Comments are highly appreciated.

Kind Regards
Ken