Urban sludge treatment device and method

Abstract

The invention discloses an urban sludge treatment device and method. The urban sludge treatment device comprises a preheater (1), a high-temperature hydrolysis acidification reactor (2), a cooler (3), a medium-temperature methane production digestion reactor (4), a desulfurizing tower (5) and a dewatering device (6), wherein the input end of the preheater (1) communicates with an urban sludge conveying pipeline; the output end of the preheater (1) is connected with the input end of the high-temperature hydrolysis acidification reactor (2); the output end of the high-temperature hydrolysis acidification reactor (2) is connected to the input end of the cooler (3); the output end of the cooler (3) is connected to the input end of the medium-temperature methane production digestion reactor (4); a methane output pipeline of the medium-temperature methane production digestion reactor (4) is connected to the input end of the desulfurizing tower (5); a sludge discharging pipeline of the medium-temperature methane production digestion reactor (4) is connected to the input end of the dewatering device (6). The sludge treatment device has the advantages of high treatment efficiency, good effects and high energy utilization rate.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to an urban sludge treatment device and method. Background technique [0002] With the increasing construction of urban sewage treatment plants in my country, the rate of urban sewage treatment has increased rapidly, the generation of urban sludge has increased sharply, and the problems of sludge treatment and disposal have become increasingly prominent. At present, most urban sewage treatment plants in my country use concentrated, dehydrated sludge to be transported to landfill or used as agricultural fertilizer. Biomass energy in municipal sludge has not been fully utilized, resulting in waste of resources and energy. Compared with other sludge treatment technologies, the use of anaerobic digestion technology can not only reduce and stabilize sludge, but also generate biogas that can be used to compensate for the energy consumption of sewage plants through power generati...

AI Technical Summary

Problems solved by technology

[0004] At present, less than 5% of urban sewage plants in my country have adopted the sludge anaerobic digestion process, and in the few sewage plants that adopt the sludge anaerobic digestion process, there are low technical levels and poor sludge treatment effects. , low treatment efficiency, low utilization rate of biogas and a series of problems

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