Filtration equipment and principle

Filtering equipment is the general name of various filtering facilities, which refers to mechanical equipment or devices used for filtering, and is often used in industrial production. Principle of filtration equipment: According to the water quality, the corresponding design scheme is adopted to efficiently remove impurities such as suspended solids, colloid, sediment, clay, humus and particulate matter in water, reduce the turbidity of water and achieve the purpose of water quality clarification.

Filtering equipment is a mechanical equipment or device used for filtering, which is a common general equipment in industrial production. Generally speaking, filtration equipment can be divided into vacuum type, rotary drum type and horizontal belt type, as well as pressure type, such as pressure filtration type, press type, dynamic filtration type and rotary type.

Classification by operation mode: intermittent filtration and continuous filtration. According to the working pressure difference, it can be divided into pressure filtration, suction filtration and centrifugal filtration.

. Typical filtration equipment used in industry: plate-and-frame filter press (intermittent operation).

According to media type: air filter. Make the polluted air clean to the state needed for production and life, even if the air reaches a certain cleanliness.

Liquid filter. Make the polluted liquid clean to the state required by production and life, even if the liquid reaches a certain cleanliness.

Network filter. By setting up the spam screen, the information displayed on the computer screen can meet the requirements as much as possible. The same absorption principle can separate different colors of light.

filter

Absorb some unnecessary light.

Mechanical filtration is the most commonly used method for sewage treatment. According to the different filtering media, mechanical filtering equipment can be divided into two types: particle media filtering and fiber filtering. Granular media filtration mainly uses granular filter materials such as sand and gravel as filter media, and realizes filtration through the adsorption of granular filter materials and the interception of solid suspended solids in water by pores between sand grains. The advantage is that it is easy to recoil, but the disadvantage is that the filtration speed is slow, generally not more than 7 m/h; The amount of sewage interception is small, and the core filter layer only has the surface of the filter layer; The filtration accuracy is low, only 20-40μm, which is not suitable for rapid filtration of high turbidity sewage.