Pneumatic cleaning composite filter screen filtering device

Abstract

The invention discloses a pneumatic cleaning composite filter screen filtering device which comprises a grit chamber and a screen type filtering device, a pneumatic cleaning assembly is arranged at the other end of the screen type filtering device, and the screen type filtering device comprises a support device, a conveying belt type filter screen and a driving device used for movement of the filter screen. The pneumatic cleaning assembly comprises gas making equipment, a pneumatic cleaning mechanism and exhaust mechanisms, a gas outlet of the gas making equipment communicates with a gas inlet of the pneumatic cleaning mechanism through a gas conveying pipeline, the pneumatic cleaning mechanism is fixedly arranged on the top of the support device, and the exhaust mechanisms communicate with the pneumatic cleaning mechanism. And air outlets of the plurality of exhaust mechanisms are opposite to the filter screen. The device is simple in structure, complete in function and free of manual operation, silt and other dirt on the filter screen are cleaned in a pneumatic mode, labor is saved, water resources for cleaning are saved, the silt and other dirt cleaning efficiency is visible and obviously improved, and practicability is high.

Description

technical field [0001] The invention relates to the field of surface water treatment and filtration equipment, in particular to a pneumatic cleaning composite filter screen filter device. Background technique [0002] The equipment conventionally used for surface cement sand and other sewage treatment and filtration is mainly sand filter, mesh filter and laminated filter. (1) The sand filter is to intercept the impurities in the water when the sewage passes through the quartz sand filter material. The filtration is mainly due to the resistance interception effect, and is mainly used to remove suspended solids in the water. After the water enters from the water inlet of the filter and flows through the filter layer, the suspended impurities in the water are absorbed by the filter layer, and the filtered water flows from the water filter cap to the water outlet. The cleaning of the filter can be completed by backwashing. At this time, the water flow is reversed and flows up...

AI Technical Summary

Problems solved by technology

Its disadvantages are high working pressure requirements, high hydraulic loss, manual cleaning consumes a lot of labor and is prone to water blocking and flow interruption events, frequent automatic cleaning causes more waste of water resources

[0003] Existing filtering equipment such as gravel filter, mesh filter and laminated filter for the removal of sediment and other dirt in the grit chamber are relatively simple in structure, and are prone to water blocking if they are not cleaned in time. When the water blocking is serious, it will cause the water in the grit chamber to overflow, and then cause the foundation of the grit chamber to be eroded, destroying the grit chamber, and the practicability is low. Therefore, it is urgent to design a pneumatic cleaning composite filter screen filter The device solves the above problems

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