Washing and regenerating method of particle filter material filter tank for preventing filter material from scaling and hardening

Abstract

The invention discloses a washing and regenerating method of a particle filter material filter tank for preventing the filter material from scaling and hardening. When the filter tank is back-washed, the method is as follows: performing air blast with compressed gas; loosening the filter compressed during filtering; starting a backwash pump to back wash after the gas is stopped and the pressure is released, wherein the particle filter material is fluidized by water through the backwash pump; and starting a filter material circulating pump to perform external circulating and back bashing on the filter material till the filter material is clean. When the back wash is completed, the filter material is stopped first and then the backwash pump is stopped; the method is thorough in back wash; no dead corner is left in the tank; meanwhile, the back washing intensity is small, the water usage is little and the effect is good; and the particle filter material is effectively prevented from scaling and hardening and the method can be widely applied for washing and regenerating the particle filter material filter tank.

Description

technical field [0001] The invention relates to a method for preventing filter material scaling and hardening, flushing and regenerating a granular filter material filter tank, especially the granular filter material filtration for oil field injection of polymer, heavy oil, high salinity, low temperature, high turbidity and high sulfur content sewage filtration treatment The tank prevents the filter material from scaling and hardening, flushing and regenerating. Background technique [0002] The treatment of the scale and hardening of the filter material of the granular filter material filter tank used in industrial water treatment usually adopts a three-step treatment method of encrypted backwash + chemical cleaning + replacement of new filter material, that is, backwash after 8 hours of operation, and with the operation As time goes on, the backwashing effect becomes worse, and chemical cleaning is carried out regularly, and the filter material is replaced after the chemic...

AI Technical Summary

Problems solved by technology

The above methods have the problems of frequent backwashing, high energy consumption, large backwashing return flow, low system efficiency, and serious environmental pollution by chemical cleaning and replacement of filter materials.

[0003] In order to solve this problem, China's announced invention patent (patent number: ZL200610091921.9, patent name: multi-media filter layer filter tank regeneration vortex flushing method) was selected for testing, although it solved the pollution of chemical cleaning and extended the replacement cycle of filter materials , but the running time is long, the center of the large filter tank is easy to form a large and small scale pile, and the problem that the inlet and outlet of the small filter tank is easy to form a scaling slope has not been solved.

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