Domestic sewage treatment system

Abstract

The invention relates to the technical field of sewage treatment, in particular to a non-phase-change drying treatment system for excess sludge used for domestic sewage treatment, which includes a mud storage tank, a belt dehydrator, a hot gas generator, a gas-liquid separator, and multiple A first cyclone separator connected in series in sequence, the mud storage tank is connected with a belt dehydrator, the first cyclone separator includes a first body, a first feed pipe, a hot gas generating device, a belt dehydrator All machines are connected with the first feeding pipe of the first cyclone separator arranged first, and all the first overflow ports are connected with the gas-liquid separator. Compared with the methods of thermal drying and thermal evaporation to remove moisture from sludge, the sludge treatment system of the present invention has a simple structure, relatively low energy consumption, high dehydration efficiency per unit time, and reduces the cost of the sewage treatment system. , small footprint, simple and easy-to-operate equipment, which is conducive to popularization.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a non-phase-change drying treatment system for excess sludge used for domestic sewage treatment. Background technique [0002] Urban domestic sewage is collected by the urban pipe network system and transported to the sewage treatment plant, where it is treated. At present, the domestic sewage treatment system of the sewage treatment plant includes a primary treatment system, a secondary treatment system and an advanced treatment system connected in sequence. The primary treatment system is a coarse grid assembly, fine grid assembly, and aeration grit chamber connected in sequence; the secondary treatment system is a biochemical tank and a sedimentation tank connected in sequence, and the biochemical pool is connected to the aeration grit chamber , the sedimentation tank is connected with the advanced treatment system; the advanced treatment system is a coagulation sedi...

AI Technical Summary

Problems solved by technology

According to the relevant regulations on the water content of sludge treatment and disposal in my country: when the water content of the sludge in domestic sewage treatment plants is less than 60% after treatment, it can be disposed of in domestic waste landfills; when the sludge is used for aerobic composting , the water content should be less than 65%; when the sludge is used to make bricks, the water content of the sludge should be less than or equal to 40%; when the sludge is incinerated, the water content of the sludge must be reduced to 20%-5%. However, the thermal drying and thermal evaporation methods currently used have the problems of high energy consumption and low dehydration efficiency per unit time. The cost of sludge moisture content reduction is high, which is not conducive to the development of the industry.

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