Cooling Tower Water Treatment Dia1.6m Rapid Sand Filter system to remove solid particles and water turbidity

Product Overview

Description

Water Treatment Sand Filter

The Rapid Sand Filter (RSF) water treatment equipment differs from the Slow Sand Filter water treatment equipment in a variety of ways, the most important of which are the much greater water treatment filtration rate and the ability to clean automatically using back washing. The mechanism of particle removal also differs. Rapid sand Water treatment filter does not use biological filtration and depends primarily on mechanical straining, sedimentation, impaction, interception, adhesion and physical adsorption. In Rapid sand water filter the complete filtration cycle (filtration and back washing) occurs sequentially.

Water Treatment Filters that must be taken off-line periodically to back wash are classified operationally as semi-continuous. Water Treatment Filters in which filtration and backwash operations occur simultaneously are classified as continuous.

 

Types of Rapid Sand Filter

There are a number of different types of Rapid sand filters depending upon bed depth (e.g., shallow, conventional and deep bed) and the type of filtering medium used (mono-, dual-, and multimedia).

A further classification can be made based on the driving force as gravity Water Filters or pressure Water  filters. Typically sand is used as the filtering material in single medium filters. Dual- medium filters usually consist of a layer of anthracite over a layer of sand. Multimedia filters typically consist of a layer of anthracite over a layer of sand over a layer of garnet.

 

 

The effectiveness of a rapid sand filter is highly dependent on the characteristics of the influent and the grainy media. Important influent properties include the concentrations, types, and particle charges of the suspended solids in the water. The depth of the media bed and the particle charges, sizes, and shapes of the grains are also crucial.

 

Smooth round grains crowd closely together and create very small pores. More jagged grains may produce larger pores, but are better at snagging solids as they pass by. Typically, layers of different grains are used to take advantage of multiple removal mechanisms.

 

Over time, the media bed of a rapid sand filter becomes clogged with accumulated solids. At this point, the filter is cleaned through a process called backwashing. Wash water is pumped upward through the bed to dislodge the solids and rinse them out of the tank. As the wash water is drained, the granular media settle back into their original layers, and the filter is ready to be used again.

 

Technical parameters sheet for Shallow sand Filter (Bypass Filtration Sand Filter)