Multi medium activated carbon filterThe equipment is pressure type, and its principle is that when raw water passes through the filter material from top to bottom, suspended solids in the water are intercepted by the surface of the filter layer due to adsorption and mechanical flow resistance; When water flows into the middle of the filter layer, due to the tighter arrangement of sand particles in the filter material layer, there are more opportunities for particles in the water to collide with the sand particles. As a result, flocs, suspended solids, and sand particles in the water adhere to each other, and impurities in the water are trapped in the filter material layer, resulting in clear water quality. The suspended solids in the filtered effluent can be below 5 milligrams per liter.

Multi media filter is a commonly used pre-treatment device for deep water purification, which can be filled with different filter materials according to process requirements

Working principle of multi-media activated carbon filter:

A multi-media filter (also known as a mechanical filter) is a typical multi-media filter that uses layered smokeless coal, sand, fine garnet, or other materials as the bed.

The top layer of the bed is composed of the lightest and coarsest grade materials, while the heaviest and finest grade materials are placed at the lower part of the bed. The principle is to filter by depth - larger particles in the water are removed at the top layer, while smaller particles are removed deeper in the filter medium. Thus, the water quality can reach the standard after coarse filtration.

Multi media filter is a commonly used pre-treatment device for deep water purification, which can be filled with different filter materials according to process requirements

Characteristics of multi-media activated carbon filter:

1. Porous media filters are widely used in water treatment processes and can be used alone, but most of them are used as pre filtration for water quality deep treatment (exchange resin, electrodialysis, reverse osmosis).

2. Multi media filter is a commonly used pre-treatment device for deep water purification, which can be filled with different filter materials according to process requirements.

3. The material of the multi-media filter can be fiberglass, A3 steel anti-corrosion or rubber lined, or all stainless steel. There are two types of operation modes: fully automatic and manual. Automatic control adopts automatic controllers and pneumatic and hydraulic valves imported from the United States. It is easy to operate and maintain, and has been widely used in pre-treatment devices of water treatment processes in various industries.

4. The filter material of a multi-media filter (including a dual filter material filter) should have sufficient chemical stability, and the relative density and particle size of each medium should have certain differences. The double-layer filter material composed of anthracite and quartz sand uses anthracite with a relative density of 1.4-1.6 and a particle size of 0.8-1.8mm, and quartz sand with a relative density of 2.6-2.65 and a particle size of 0.5-1.2mm. In addition to the above two types of filter materials, the 3-layer filter material can also use heavy ores such as manganese sand and magnetite with a relative density of 4.7-5.0 and a particle size of 0.5-4mm.