Industrial water filtration?
Discussion
I work for a stone benchtop company and we're in the process of looking at a wet CNC, but water is the issue.
At the moment we run a CNC Saw which uses recycled water with no problems. But the CNC requires the water to be at least 10 microns for the spindle - so almost clean and can be a bit dirtier for the halo.
Trouble is, here in NZ waste water has to be disposed of correctly and clean water is metered (iirc 40L/min is a figure I have in my head).
At the moment we have 4 250L tanks that siphon into each other and a pump in the last one that supplies the saw though a particulate filter that gets the big stuff. But the really fine slurry gets through and would very quickly clog up the spindle.
Does anyone have any ideas of DIY set ups to help get the water as clean as possible?
Alex
At the moment we run a CNC Saw which uses recycled water with no problems. But the CNC requires the water to be at least 10 microns for the spindle - so almost clean and can be a bit dirtier for the halo.
Trouble is, here in NZ waste water has to be disposed of correctly and clean water is metered (iirc 40L/min is a figure I have in my head).
At the moment we have 4 250L tanks that siphon into each other and a pump in the last one that supplies the saw though a particulate filter that gets the big stuff. But the really fine slurry gets through and would very quickly clog up the spindle.
Does anyone have any ideas of DIY set ups to help get the water as clean as possible?
Alex
ETA sorry I guess you mean you want to recycle the water ?
There are loads of google results on it, you can get filters that will filter it down to that level. Use pressure gauges either side to monitor when it needs replacing etc.
There are loads of google results on it, you can get filters that will filter it down to that level. Use pressure gauges either side to monitor when it needs replacing etc.
Edited by Jimmyarm on Tuesday 20th September 11:53
Edited by Jimmyarm on Tuesday 20th September 11:56
Best start filtering the return line also if you're getting debris through currently (I assume this debris is coming from the recycled nature of the water?).
Maybe a sediment trap. The finer the filter and the more of them will add frictional losses, so the pump may need looking at also.
Clean out the tanks and start as clean as possible.
I've only installed small domestic filter setups from spring/ well fed water.
Maybe a sediment trap. The finer the filter and the more of them will add frictional losses, so the pump may need looking at also.
Clean out the tanks and start as clean as possible.
I've only installed small domestic filter setups from spring/ well fed water.
It's a long time since I did this stuff, but backwash filters seem to offer what you need. i.e. pump dirty water through filter, once pressure drop reaches a certain point you reverse the flow to clean the filter, once clean you resume normal flow. Typical set up would have two sets of filters so that when one is being backwashed the other is doing filter duty.
Too long out of the industry to be able to suggest a sullier though!
Too long out of the industry to be able to suggest a sullier though!
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