Super-deep bed filter with external circulating cleaning function

Abstract

The invention relates to a filter. The filter comprises a filter body and an external cleaning circulating device, wherein the filter body comprises a filter tank body, a filter material, an upper pipeline and a lower pipeline; the filter material is arranged in the filter tank body, the upper pipeline comprises a liquid inlet pipe, the lower pipeline comprises a water outlet pipe, the external cleaning circulating device comprises an external cleaning device, a backwashing feeding pipe, a backwashing water outlet pipe and a backwashing pump, and the external cleaning circulating device is connected with the filter body. According to the filter, as the external cleaning circulating device is arranged, the filter material can be cycled, back-washed and regenerated thoroughly with high strength, and the difficulties that the filter material of the filter equipment has short service life and low filtering precision due to backwashing regeneration difficulty and poor anti-contamination capability of the filter material can be solved, the backwashing strength can be improved, and a problem of the prior art that the liquid containing sewage difficult to be separated from the filter material cannot be filtered is solved.

Description

technical field

[0001] The invention relates to a filter device for liquid treatment, in particular to an ultra-deep bed filter for extracorporeal circulation cleaning, and belongs to the technical field of environmental protection. Background technique

[0002] In liquid treatment, the filter equipment that uses solid particle filter material to form a filter bed for filtration and separation is used as one of its terminal treatment equipment. Because of its high efficiency and reliability, the filter material can be used for backwash regeneration and is widely used. However, in the past filters, it was difficult to backwash the filter material, which made the regeneration of the filter material incomplete, especially when the incoming water contained colloids with strong adhesion to the filter material, such as polymers, and heavy oil with high viscosity. When there are dirt and other impurities on the surface of the filter material, the backwashing intensity of the existi...

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