Spiral self-stirring dry fermenting device and method

Abstract

The invention discloses a spiral self-stirring dry fermentation device and a method. Fermentation cylinders are obliquely arranged at the bottom in a gas storage tank which is installed on a top board of a leachate holding tank; an enclosed inner cylinder is arranged at the central part in each fermentation cylinder along an axial direction; a leachate jet pipe is mounted in the inner cylinder; nozzles are distributed on the leachate jet pipe and extend out from the inner cylinder; spiral separator plates are distributed in each fermentation cylinder along an axial direction, and initiating terminals of the spiral separator plates are located behind a feed inlet; a lower end of each fermentation cylinder is provided with a material outlet, a slag removal opening communicating with the material outlet of the fermentation cylinder is mounted on a base plate of the gas storage tank, and a slag removal door is arranged on the slag removal opening; the leachate holding tank is provided with a leachate return pipe communicating with the gas storage tank and a pipeline communicating with a leachate inlet of the leachate jet pipe; electric heating pipelines are distributed in the leachate holding tank; and a biogas conveying pipeline communicating with the upper part of the gas storage tank is arranged at the upper part of the leachate holding tank. The invention also provides the method of using the device for fermentation.

Description

technical field [0001] The invention relates to a biogas dry fermentation device, in particular to a screw self-stirring dry fermentation device and method. Background technique [0002] At present, the traditional method of manure fermentation to produce biogas adopts mixed fermentation, which needs to use a large amount of clean water to adjust the material concentration (TS concentration) to 8%-12%, and then carry out anaerobic fermentation to consume organic matter. The removal and loss of biogas slurry and biogas residue, on the one hand, causes losses, and on the other hand, there is a big problem in the consumption of biogas slurry, and if it is not handled properly, it will cause secondary pollution. In recent years, a dry fermentation technology has emerged. Dry fermentation refers to the use of organic waste as raw material (with a dry matter concentration above 20%) to decompose it into CH by hydrolyzing acid-producing bacteria, hydrogen-producing acetogenic bacte...

AI Technical Summary

Problems solved by technology

At present, the known dry fermentation equipment consists of garage-type dry fermentation equipment, air bag type dry fermentation equipment, dry-wet joint type dry fermentation equipment, etc. These dry fermentation equipment adopt the form of batch batch fermentation in order to solve the problem of anaerobic sealing , and most of them are fermented at room temperature, which has the disadvantages of long fermentation time, low volumetric gas production rate, high energy consumption for stirring, and incomplete consumption of organic matter

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