samuelbb1
Mechanical
- Jun 29, 2013
- 3
Hello,
Same issue as the in this thread thread378-438609 .
System requirement calls for 200m3/h river water, 50micron/99% removal efficiency. River water contains silt and small wood fibers.
Pre filtering stage is a mesh 16 sidehill screen, settling tank with no chemicals, and pumped to a hydrocyclone and to the main filter.
Silt accumulates on the bottom of the tank. It forms an agglomerate but is not removed at the hydrocyclone.
Main filtering stage has been tested with mesh 500 (35micron) screen basket. Two problems occur.
1. Silt/Agglomeration happens on the outside (outlet side) of the basket, detaches and clog the consumers downstream.
2. Sufficient amount of silt gets thought, settle on the pipe/hoses, agglomerate to something larger than 600microns, and eventually clog the consumers downstream. Improving flow velocity and pipe/hose length is not viable.
Consumers are seals and nozzles.
Self-cleaning filters have not been successful.
What would be the least expensive solution (opex wise) for significant silt removal and agglomeration inhibition at this scale?
Our water treatment plant with precipitation chemicals and sand filter (NTU<5) still fouls some ion exchange resin columns. A WTP for 200m3/h and silt removal requires a settling tank with more area than we have available.
Thanks.
Same issue as the in this thread thread378-438609 .
System requirement calls for 200m3/h river water, 50micron/99% removal efficiency. River water contains silt and small wood fibers.
Pre filtering stage is a mesh 16 sidehill screen, settling tank with no chemicals, and pumped to a hydrocyclone and to the main filter.
Silt accumulates on the bottom of the tank. It forms an agglomerate but is not removed at the hydrocyclone.
Main filtering stage has been tested with mesh 500 (35micron) screen basket. Two problems occur.
1. Silt/Agglomeration happens on the outside (outlet side) of the basket, detaches and clog the consumers downstream.
2. Sufficient amount of silt gets thought, settle on the pipe/hoses, agglomerate to something larger than 600microns, and eventually clog the consumers downstream. Improving flow velocity and pipe/hose length is not viable.
Consumers are seals and nozzles.
Self-cleaning filters have not been successful.
What would be the least expensive solution (opex wise) for significant silt removal and agglomeration inhibition at this scale?
Our water treatment plant with precipitation chemicals and sand filter (NTU<5) still fouls some ion exchange resin columns. A WTP for 200m3/h and silt removal requires a settling tank with more area than we have available.
Thanks.
