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What is a mechanical filter


2022-04-29 14:39

The mechanical filter is also called a pressure filter. It is an important part of the pretreatment of pure water preparation and water purification system. The material is steel lined rubber or stainless steel. According to the different filter media, it is divided into natural quartz sand Media filters, manganese sand filters, etc., can be divided into single-flow filters and double-flow filters according to the water inlet method, which can be used in combination or alone according to the actual situation.

1. Working principle

The mechanical filter uses one or several filter media, under a certain pressure, to make the raw liquid pass through the media to remove impurities, so as to achieve the purpose of filtration. The built-in fillers are generally: quartz sand, anthracite, granular porous ceramics, manganese sand, etc., users can choose to use according to the actual situation. The mechanical filter mainly uses the filler to reduce the turbidity in the water, intercepts the suspended solids, organic matter, colloidal particles, microorganisms, chlorine smell and some heavy metal ions in the water in the removal area, so as to purify the feed water. One of the traditional methods of water treatment.

2. Scope of application

Mechanical filtration is widely used in the water treatment process, mainly used for water treatment to remove turbidity, reverse osmosis, and the pre-treatment of ion exchange softening and desalination systems, and can also be used for surface water and groundwater to remove sediment. The inlet water turbidity is required to be less than 20 degrees, and the effluent turbidity can reach below 3 degrees.

3. Performance characteristics

1. Low equipment cost, low operating cost and easy management

2. The filter material can be used many times after backwashing, and the filter material has a long service life

3. Good filtering effect and small footprint

Fourth, the selection of mechanical filters

The size of the mechanical filter is determined according to the amount of water. According to different purposes, A3 steel material or stainless steel material or glass fiber reinforced plastic can be selected. It is also necessary to choose single-layer filter material, double-layer filter material or multi-layer filter material according to the water supply quality and effluent quality requirements. filter material.

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