Sludge treatment system and method based on catalytic thermal hydrolysis assisted hydrothermal carbonization

Abstract

The invention discloses a sludge treatment system and method based on catalytic thermal hydrolysis assisted hydrothermal carbonization and belongs to the technical field of sludge treatment. The sludge treatment system comprises a sludge thermal hydrolysis pretreatment unit, a sludge hydrothermal carbonization unit and a product recovery unit; the structure of the system is designed by combining a thermal hydrolysis technology and a hydrothermal thermal carbonization technology, biomass and industrial waste are subjected to resource treatment, secondary pollution generated during waste treatment is very small, and in the sludge treatment process, due to the existence of water with high fluidity, the energy consumption and the operation cost of the system are reduced; the whole system has economical efficiency and ecological value, and provides a certain thought for waste disposal and sludge resource utilization.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a sludge treatment system and method for catalyzed thermal hydrolysis and assisted hydrothermal carbonization. Background technique [0002] A large amount of sewage is inevitably produced in production and life, and the sewage treatment plant will produce a large amount of sludge in the process of treating sewage. The sludge, especially the urban sludge, is high in water and rich in organic matter, and contains inorganic components, Pathogenic microorganisms and other toxic and harmful substances (dioxins, etc.). [0003] At present, landfill, composting, pyrolysis and incineration are common sludge treatment and disposal technologies, but they have more or less shortcomings. Most of the existing sludge thermochemical disposal systems are supported by a single technology, and the product acquisition is relatively simple. , The resource utilization of sludge...

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Problems solved by technology

[0003]At present, landfill, composting, pyrolysis and incineration are common sludge treatment and disposal technologies, but they have more or less shortcomings. Most of the sludge thermochemical treatment systems are supported by a single technology, the product acquisition is relatively simple, and the resource utilization of sludge is relatively low

As the main disposal method of sludge, incineration will produce a large amount of pollutants including CO, NOx, SO2, PCDD / Fs and heavy metals. Although the reduction is obvious, the environmental risk is high

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