Device and method for filtering sewage and cleaning wall of filter cartridge

Abstract

The invention relates to a device and a method for filtering sewage and cleaning the wall of a filter cartridge. Sewage and clear water are selectively injected into a filtering device through a waterinlet device, the wall and the bottom can be cleaned through a driving device while sewage is filtered, and a filter screen can be cleaned by introducing clear water after filtering. Thus, the filtering process and the filter cartridge wall cleaning process are carried out at the same time, the filtering efficiency is enhanced, and the operation is simple and convenient.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a device and method for filtering sewage and cleaning the wall of a filter cylinder. Background technique [0002] Sewage treatment is to use physical, chemical and biological methods to treat wastewater, purify wastewater, reduce pollution, and achieve wastewater recycling, reuse, and make full use of water resources; domestic sewage is the wastewater discharged by people in their daily activities. Contaminated by domestic fertilizers, the composition and concentration are related to people's living habits and water consumption. Domestic sewage generally does not contain toxic substances, but it has conditions suitable for microbial reproduction. The existing sewage treatment methods mostly use physical treatment methods. Physical treatment methods can be divided into gravity separation method, centrifugal separation method and sieve retention method, etc. The processin...

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Problems solved by technology

[0002] Sewage treatment is to use physical, chemical and biological methods to treat wastewater, purify wastewater, reduce pollution, and achieve wastewater recycling and reuse, making full use of water resources; domestic sewage is the wastewater discharged by people in their daily activities. Contaminated by domestic fertilizers, the composition and concentration are related to people's living habits and water consumption. Domestic sewage generally does not contain toxic substances, but it has conditions suitable for microbial reproduction. The existing sewage treatment methods mostly use physical treatment methods. Physical treatment methods can be divided into gravity separation method, centrifugal separation method and sieve retention method, etc. The processing units of gravity separation method include sedimentation, flotation, etc.; The centrifugal separation method itself is a processing unit, and the processing devices used include centrifugal separators and hydrocyclones, etc.; the sieve retention method has two processing units, the grid screen retention and the filtration, and the former generally uses the grid and the filter. screen, the latter uses a sand filter and a microporous filter; and the existing filter device will not only leave debris on the filter screen after filtration, but also leave debris on the cylinder wall, the application number is The invention patent application of ZL201710878152.5 discloses a device and method for absorbing dirt attached to the inner wall of the raw water tank. Through the functions of the ring base, sliding column and steering rocker, manual cleaning is not only labor-intensive but also difficult. The problem of cleaning up; but it is not difficult to see that whether it is to remove the debris on the screen or the wall of the cylinder, it needs to be processed after filtration, which is too cumbersome and will delay the efficiency of filtration

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