Methane-producing anaerobic reactor and technology for treating kitchen slurry

Abstract

The present invention discloses a methane-producing anaerobic reactor and a technology for treating kitchen slurry. The kitchen slurry in a reactor tank body is subjected to first circulating heat exchange and second circulating heat exchange; the first circulating heat exchange comprises exchanging heat of part of liquid discharged from a top part in the reactor tank body, mixing the liquid afterheat exchange with the kitchen pretreatment slurry and then putting the mixture into a bottom part of the reactor tank body; the second circulating heat exchange comprises discharging materials froma middle upper part of the reactor tank body and performing tank top spraying feeding or tank bottom annular feeding on the discharged materials from the middle upper part of the reactor tank body. The operation is stable. Advantages are as follows: heat exchange strengthening and discharging optimization of a circulating heat exchange system are conducted, and the methane-producing anaerobic reactor prevents scaling, resists impact, and resists water volume and temperature changes, increases vertical circulation of materials, enhances contact efficiency of microorganisms and substrates, is avoided from acidification, improves anaerobic reaction efficiency and realizes stable operation.

Description

technical field [0001] The invention belongs to the technical field of kitchen waste treatment, in particular to the technical field of equipment for anaerobic fermentation of kitchen waste, in particular to a biogas-producing anaerobic reactor and a process for treating kitchen slurry. Background technique [0002] Food waste contains extremely high moisture and organic matter, which is easy to rot and produce bad smell. After anaerobic fermentation and treatment, it can be converted into biogas of clean and renewable energy, realizing the harmless treatment of kitchen waste, and has broad application prospects. The key equipment to realize the anaerobic fermentation treatment of food waste is the anaerobic reactor. There are many reports about anaerobic reactors in the prior art. [0003] Chinese patent application, patent number ZL 201620341508.2, application date 2016.04.21, authorized announcement number CN205556680 U, authorized announcement date 2016.09.07, disclose...

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Problems solved by technology

[0005] In view of the problems of uneven vertical material and temperature distribution and top scum capping in the actual implementation process of the anaerobic reactor for the treatment of kitchen waste disclosed in the prior art, the direct water discharge process from the top can easily lead to In order to solve the problems of scum discharge, uneven discharge, blocked pipes and top overflow, the purpose of the present invention is to provide a biogas-producing anaerobic reactor and a biogas-producing process for processing kitchen slurry, increase heat exchange enhancement and optimize output The circulating heat exchange system of raw materials makes the anaerobic reactor have the functions of anti-scaling, anti-shock, anti-water volume and anti-temperature change, increases the circulation of materials inside the reactor, enhances the contact efficiency between microorganisms and substrates, and avoids anaerobic reactors. acidification, improve the efficiency of anaerobic reaction, and realize the stable operation of anaerobic reactor

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