Filter factory introduction to several methods of pretreatment

Preprocessing is the preliminary processing of the water, RO reverse osmosis system and UF ultrafiltration systems typically require pretreatment system, pretreatment of the commonly used several kinds of filter core; PP filters, wire wound filter, folded filter, big flow filter, activated carbon filter, sintered filter, etc. , usually pretreatment is dealing with the sediment, particles and impurities in the water, suspended solids, etc. , it what method, with filtering and see below.

preprocessing method are many, the main are pre sink, coagulation, clarification, filtration, softening, disinfection, etc. Use these methods after pretreatment, can make the water suspended solids ( Turbidity) , chromaticity, colloid content, organic matter, iron, manganese, temporary hardness, microorganism, impurities such as volatile matter, dissolved gas to remove or reduce to a certain extent.

1, heavy is big volume, low flow rate of natural precipitation process, such as sand basin, pond.

2, coagulation using iron salt, aluminum salt and polymer coagulants, and the impurities in the water by flocculation and bridging role, producing large sediment particles, and then by other devices, such as clarification tank, filter tank, etc. , shall be removed.

3, clarify by coagulant function and form larger particles of sediment separation within the clarifier, sediment, clear water.

4, filter has to be treated water is equipped with special filtering material device, such as various kinds of filter, intercept impurities in water, shall be removed.

5, to soften the chemicals, such as lime, soda ash, etc. , makes the water carbonate hardness to remove; Or the methods of cation exchange resin to remove the water of calcium, magnesium, iron, etc. , this process is called softening.

6, disinfection to join the biocide, such as liquid chlorine, bleaching powder, etc. , kill the microorganisms in the water.

preprocessing system is very important for rear filtering system, is used to protect the rear system, reduce the load, improve its service life, pretreatment for different pollutants, choose the corresponding treatment method, in order to play its biggest effect.