Cooling Towers are an integral part of cooling systems and need to be maintained to maximise efficiency and performance. If not maintained correctly, the dirty process water will corrode the cooling tower equipment, reduce heat exchange efficiency and drive up energy costs, leading to unnecessary water wastage.
Water filtration is a cost-effective method of addressing all water treatment issues and this is done by means of filtering the suspended solids from the cooling water.
Side stream filters are often the preferred choice for many cooling systems since they can be installed on an operational cooling tower; and can be cleaned while the cooling system remains online, avoiding the need for downtime.
Side stream filters are commonly used in evaporative cooling water systems and work by directing water through a bed of graded filter media, usually made up of compounds such as silica, anthracite, or garnet.
Media Type Filters
Filtration of cooling water means using a conventional type of filter which contains filter media, normally graded sand, or “mixed media” where the sand has an additional layer of graded anthracite on top of it. Anthracite/sand filter beds normally provide all the advantages of single-media filtration but require less backwash water than sand alone.
The major advantages of dual-media filtration are higher flow rates and longer filter runs. Filters of this design can remove suspended solids down to 20micron in size.
IWC offers a range of skid mounted cyclone filter systems, these are ideally suited to smaller plants and comprise of the following skid mounted equipment.
- Feed pump
- Cyclone type separator
- Basket Filter
- Digital control system
The major advantages of cyclone filters is reduced water consumption and smaller footprint. Filters of this design can remove suspended solids down to 70 microns in size.