Filtration of Cooling Tower Water

One thing that might help is a closed-circuit evaporative-cooled tower. Then the machine cooling water would not be exposed to atmospheric dust. The cooling tower water would still have this issue, but it wouldn't be as sensitive. Side-stream filtration would then be suitable. Because of the interposing heat exchange step (about 15°F difference), the tower would be somewhat larger.

Agreed.

Plate - Frame heat exchanger, http://chemicalengineeringspot.blogspot.com/2008/11/plate-and-frame-heat-exchangers.html

Dolphin - water treatment system - not chemical http://www.clearwater-dolphin.com/

Monthly blow downs out of tower strainer basket.

That should do it!

Please describe the current cooling water treatment regime.

Full flow centrifugal separator(s) are good but must be sized properly and located where the flow rate is fairly constant.

Is the water open to the atmosphere at the individual machines with gravity flow? You could use bag filter material to catch solids. Perhaps cycle between multiple bags for uninterupted flow. If a single bag fills up, it will just overflow without compromising flow.

Avoid oversized piping and provide a large sump/settling tank?

While not perfect, side stream filtration will help.

Side stream filtration. These are self-cleaning type so would be less of a hassle for maintenance. I would think that bag filters will choke very easily and replacement costs (for bags) may render it uneconomical.

Installation of sand or carbon filters which is used in water treatment plants shall be considered. Regular draining and cleaning of the cooling tower basin will reduce the scale formation.

Carbon filters are for the removal of organics and chlorine. The OP has a problem with solids. Carbon filters are not suitable for the removal of solids. Further, being catalytically active, they might interfere with the OP's existing cooling water dosing regime.

Thanks Sir. I have suggested general methods used in water treatment plant like R.O Plant. I agree with your comments that carbon filters may pose problem with the Ops system.

The cooling tower by virtue of its function picks up dust and water needs to bleed off from the tower to keep the concentration of the solid particles.

It is necessary to have double fitration at the outlet of cooling tower so that your machines get relatively clear water. It would be better to provide individual stariners also atthe entry point of each load wharer the cooling water is circulated.You may get some chemicals added to keep the dust in collaidal form which can be removed.You try contacting VASU Chemicals who are specialized in treating the cooling water.

Thanks dear enervac. I called up Vasu Chemicals person. They are suggesting use of dispersantswhich will not allow suspended impurities to settle in the system and will be removed from the system through regular blowdowns.

I think I should give it a try. I am studying MSDS and other relevant information.

Dear Sangeetkumar,

All process cooling water circulation is riddled with clogging of supply lines to machines. Marble sawing is a perfect example. If you need your supply arteries without clogging a bit, filtration is the only solution.

I have my patented vacuum filtration technology for continuous recycling of process water in a closed system removing solid particles without letting them accumulate in the system. you can refer to Indian Patent # 208362 on the Patent department's net portal.

If you find it useful, contact me with a pm Mahess

Are you use baccomber in your cooling tower it protects the scale formation.... clean the stainer filters regularly.