Side stream filters is very essential system for smooth operation and performance of cooling tower and heat exchangers. Side stream filter remove atmospheric impurities like dust, particles, suspended solids and reduce fouling and biological growth help to control the issue like corrosion & scaling and enhance the performance of cooling tower & heat exchanger.
Our simple but well engineeredmulti media water filter acclaims stringent design, High performance; less pressure drop across the bed, longevity, optimum utilization of surface area ensure us to gain more and more clients satisfaction.
There are several types of dual media filters available in the market. The popular choices are:
It is used in dual-media filtration with sand because its specific gravity is lighter than sand. Due to high carbon content, it resists the majority of chemicals. It is a high physical strength material which is used in a wide variety of applications. It has high removal capacity of SS and turbidity. It is used as the carrier for bio film treatment. Micro-flocks grow easily in the medium.
Other than filtration, Calcite Filters achieve a high degree of neutralization. They raise the pH value of water so that it achieves non-corrosive equilibrium. Increased water quality avoids leaching of copper pipes, metal pipes, and plumbing components. Since Calcite is naturally found component, it is a cost-effective solution. The cartridge designs fit a majority of filtration plants.
They are ideal for removing residual disinfectants as well as organic constituents in the water so that the health hazards can be minimized. The filters also greatly improve the taste of water. When treated water is supplied to other filtration systems such as RO, it saves from organic fouling or oxidation. Higher molecular weight of particles means the higher efficiency of carbon filters. Similarly, lower pH value means the removal is efficient. Activated carbon effectively removes high contaminant concentration. It is available in large, medium and fine mesh sizes.
Multimedia filtration uses three or more media layers whereas sand filters use a single layer of a particular grade. In the single media filters, the smallest (or finest) media particles are on the upper layers of media bed and bigger and heavier particles are on the lower layers. Since all filterable particles are within 2 to 3 inches on the upper layers, this filter doesn’t use the media depth optimally.
As a result, the filter run times shortens, and there are filter blinds in the process. Three types of media layers are used in these filters; Garnet, anthracite, and sand. Since there is a big disparity in their densities, they make the filtration system effective.
As far as filtration media per unit volume is concerned, Anthracite has the largest PUV value followed by sand and garnet. Due to the differential PUV value, large contaminations get trapped in the first layer, and small contaminations particles shift down to the lower layers. Therefore, efficient turbidity removals and extended run times between two backwash cycles can be achieved.
Reports say that the simple sand filter can remove particles up to 2 to 50 microns size, multimedia filters can remove up to 10 to 15 microns size. It means the efficiency is quite high.
When filters operate at high-pressure differential, particles deep dive into the media bed and even the strongest backwash is also unable to remove them completely. Thus, you get a lot of dirt accumulated in the deeper layers of media bed and the filter running time gets shortened gradually.
In such situation, filter backwash process has to use air scour, so that packed dirt gets loosened. A drain down period is required in the backwash cycle to let the water come out of the filter vessel before you use air scour.
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