Anaerobic dry fermentation device and method of pre-aeration temperature-rising sequencing batch type

Abstract

The invention discloses an anaerobic dry fermentation device of pre-aeration temperature-rising sequencing batch type. The fermentation device comprises an anaerobic dry fermentation reactor and an aeration mechanism. The anaerobic dry fermentation reactor is detachably covered with a sealing cover, a material reaction zone is arranged in the anaerobic dry fermentation reactor, the material reaction zone is used for placing reaction materials, the upper end of the anaerobic dry fermentation reactor is provided with an air outlet hole, and the lower end of the anaerobic dry fermentation reactoris provided with a liquid outlet hole; the aeration mechanism comprises a fan, an air inlet pipe and an aeration pipe, one end of the air inlet pipe is communicated with the fan, the other end of theair inlet pipe is communicated with the aeration pipe through the air inlet hole of the anaerobic dry fermentation reactor, and the aeration pipe is located inside the material reaction zone; and theupper part inside the anaerobic dry fermentation reactor is provided with a spray head, liquid can be sprayed from the spray head to the material reaction zone, so as to realize self-heating of the reaction materials, ensure the temperature requirements of the materials for anaerobic fermentation, and improve the reaction efficiency and output rate.

Description

technical field [0001] The invention relates to the technical field of biogas preparation equipment, in particular to a pre-aeration and temperature-raising sequential batch anaerobic dry fermentation device and method. Background technique [0002] In recent decades, with the rapid development of my country's economy and society, the output of rural domestic waste has increased significantly. my country's annual output of crop straw is about 1.04 billion tons, 20% of which is not effectively utilized, and livestock and poultry manure is about 3.8 billion tons, 40 100 million tons of vegetable waste, 250 million tons of township domestic waste and human excrement, 150 million tons of waste from meat processing plants and crop processing plants, and 50 million tons of forestry waste (excluding firewood forests), There are about 50 million tons of other types of organic waste, equivalent to about 700 million tons of standard coal, most of which have not been effectively utilized...

AI Technical Summary

Problems solved by technology

In addition, the high fiber content and poor flowability of agricultural waste limit the choice of continuous process

However, in the existing sequencing batch anaerobic dry fermentation technology, an external heat source is required to ensure the growth and reaction efficiency of microorganisms in the fermenter. Pipeline pumps can reduce mechanical energy consumption, but there are also problems such as incomplete reaction of reactants, unstable fermentation, and low output rate.

Images