Backwashing device of microfilter

Abstract

The invention relates to a backwashing device of a microfilter. The backwashing device comprises a backwashing water tank, a disinfectant storage tank and a backwashing water pump, the backwashing water tank is communicated with the microfilter water purification tank body through a water inlet pipe, a floating ball switch is arranged at the tail end, extending into the backwashing water tank, of the water inlet pipe, and when the floating ball switch floats to a set position, the water inlet pipe is blocked, and when the floating ball switch falls to another set position, the water inlet pipe is opened; the water inlet end of the backwash water pump is connected with a water pump water inlet pipe extending into the backwash water tank, the water outlet end of the backwash water pump is connected with an inlet of the Venturi tube, a negative pressure tube of the Venturi tube extends into the disinfectant storage tank, and an outlet of the Venturi tube is communicated with the high-pressure backwash tube; a row of backwash nozzles arranged at intervals are arranged at the lower part of the high-pressure backwash pipe, and the adjacent backwash nozzles are staggered by a set angle back and forth.

Description

technical field [0001] The invention relates to a backwashing device for a microfilter, belonging to the technical field of backwashing for a microfilter. Background technique [0002] At present, the removal method of suspended particulate matter in the industrial circulating aquaculture system is mainly by using a drum microfilter. The suspended particulate matter in the water body is mainly composed of food residues, fish feces, and microbial flocs that have fallen off due to aging. Rich in C, N, P and other nutrients, it is easy to cause a large number of heterotrophic bacteria to grow. When the microfilter is running, it can intercept particles larger than the pore size of the filter, and the intercepted particles will increase with time, resulting in blockage of the filter and affecting the filtration efficiency of the microfilter. At present, a backwashing device is commonly used on the top of the microfiltration machine, using tap water or filtered water for backwas...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a backwashing device for a microfilter to solve the problem that the current high-pressure backwashing jet water of the filter screen is not clean enough, and the residual dirt will form a biofilm on the filter screen, resulting in a decrease in the filter capacity of the filter screen, and even damage to the filter screen. Corrosion of the filter screen causes damage to the mesh, which affects the filtration performance, and the problem of unbalanced backwash water level control and low automation

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