Sewage treatment system based on flushing type sludge separation

Abstract

The invention discloses a sewage treatment system based on flushing type sludge separation. The sewage treatment system comprises a magnetic coagulation reaction system, a pre-sedimentation tank and a magnetic microfiltration system which are sequentially connected in series. The pre-sedimentation tank is combined with high-speed water flow impact flushing sludge in the traditional magnetic coagulation separation process to realize staged sludge backflow; excess sludge backflow and magnetic powder recycling are fully utilized, and the treatment load of the system is improved on the basis that the dosage of chemicals is reduced. The pre-sedimentation tank is combined with the magnetic microfiltration system so that the impact load of the magnetic microfiltration machine is improved, the sludge concentration in the magnetic ring is reduced, the energy consumption of the system is reduced, the service life of the magnetic microfiltration system is prolonged, and the effluent quality is stabilized; due to the fact that the scraper mechanism is omitted, the magnetic ring structure of the magnetic micro-filter can further adopt a central shaft supporting mode, the rigidity of the equipment is improved, and then the service life of the equipment is prolonged.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage treatment system based on flushing sludge separation. Background technique [0002] In recent years, with the continuous in-depth research of water treatment technology, the technology of sewage treatment has been continuously developed. Sewage treatment is essentially the separation and transformation of pollutants in water. After the pollutants are separated, they can enter the next step of removal. Therefore, the separation of pollutants is a key step in the process of sewage treatment, which directly affects the effect and cost of sewage treatment. Strengthening the separation effect is of great significance for improving the effect of sewage treatment. Among them, the magnetic coagulation process is a common method in water treatment. Magnetic particles are introduced into the high-efficiency flocculation and sedimentation process, which will Insoluble po...

AI Technical Summary

Problems solved by technology

Existing magnetic microfiltration equipment mostly uses a scraper-type mud scraping mechanism to remove magnetic sludge. In this mechanism, there is an inevitable gap between the mud scraper and the magnetic ring piece, which will cause unclean mud scraping; and the mud scraping process In the process, the original adsorbed flocs containing magnetic powder will be broken up again, causing the sludge to re-enter the water, which will cause the effluent water quality to exceed the standard

In addition, because the existing scraper is designed inside the magnetic ring, the magnetic microfiltration system cannot be supported by the central shaft for transmission, and can only use the structure of the supporting wheel. The system is not stable and the noise is large.

And under long-term operation conditions, the magnetic ring will be displaced in the axial direction, resulting in uneven force on the scraper and serious wear between the scraper and the ring, which will affect the service life

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