Horizontal sand filter

[shubham Inc]

Pressure filters typically offer lower initial and operating costs
than conventional systems, and the package nature of these systems
greatly simplifies the design and installation for the engineer and
contractor.

Specifically, pressure filter systems have been developed to focus on
common ground water problems like iron, manganese and hardness. For
high iron and manganese applications, our pressure filters can be
provided with manganese green sand and potassium permanganate feed
systems.

<a href="http://www.shubhamindia.com/
horizontal_pressure.html">horizontal pressure filter</a> are
especially well suited for the high volume flows required by large
municipalities, industries, and power utilities. Our unique multi-cell
backwash system offers the economy of horizontal pressure filters,
without the need for backwash pumps.

We supply different types of filter used for industrial and potable
water supply. The filter are being used in potable and advance
wastewater treatment plant and other industries.

Working Principle
In pressure sand filter raw water flows down wards through the filter
bed and as the suspended matter- which has usually been treated by
addition of a coagulant like alum- is retained on the sand surface and
between the sand grains immediately below the surface.

There is steady rise in the loss of head as the filter process
continues and the flow reduces once the pressure drop across the
filter is excessive. The filter is now taken out of service and
cleaning of the filter is effected by flow reversal. To assist in
cleaning the bed, the backwash operation is often preceded by air
agitation through the under drain system. The process of air scouring
agitates the sand with a scrubbing action, which loosens the
intercepted particles. The filter is now ready to be put back into
service.