Device and method for large-scale pretreatment of domestic garbage

Abstract

The invention discloses a device and a method for large-scale pretreatment of domestic garbage. The device comprises a vertical cylinder, an air suction component, a double-screw discharge component and a temperature automatic control component, wherein the air suction component is matched with the vertical cylinder; a raw material cavity, an air inlet duct and an air outlet duct are arranged in the vertical cylinder; the air inlet duct and the air outlet duct are oppositely arranged at the two ends of the raw material cavity; the face of the air inlet duct facing the raw material cavity is provided with a plurality of air inlet holes which are communicated with the raw material cavity; the face of the air inlet duct far away from the raw material cavity is provided with more than one air inlet; the face of the air outlet duct facing the raw material cavity is provided with a plurality of air outlet holes which are communicated with the raw material cavity; and the face of the air outlet duct far away from the raw material cavity is provided with more than one air outlet. According to the method, the garbage material is continuously filled into the raw material cavity of the vertical cylinder lot by lot, fermented by intake air and continuously discharged lot by lot. The device has the advantages of simple and compact structure, small floor area and the like; and large-scale, industrial, engineered and continuous flow line production of the pretreatment of the domestic garbage can be realized.

Description

technical field [0001] The invention mainly relates to the field of environmental protection equipment, in particular to a device mainly used for large-scale pretreatment of domestic garbage and a pretreatment method thereof. Background technique [0002] "Urban domestic waste disposal" is a common concern of all countries in the world today, and waste disposal in large cities has become an organized, specialized and complex activity. Contemporary municipal solid waste treatment technologies include traditional technologies (sanitary landfill, incineration) and new technologies (biological treatment technology, advanced thermal conversion technology, mechanical heat treatment technology), each of which has its own advantages and disadvantages and applicable conditions. The root cause of the difficulty in municipal solid waste disposal lies in the high moisture (moisture content of 40% to 60%), high biomass waste content (as high as 50% to 70%), high viscosity and low calorif...

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Problems solved by technology

[0004] The existing domestic waste fermentation or digestion methods and devices have many disadvantages, for example: the bar stack type has the disadvantages of large occupation area and impact on the environment due to overturning; the warehouse type has the disadvantages of large occupation area, relatively complicated exhaust pipe, difficult operation and maintenance, and disposal The quantity is limited, and the machinery is prone to failure. Others, such as vertical fermentation tanks, horizontal drum fermentation devices, and box-type (pool-type) fermentation tanks, all require positive pressure and forced air supply for oxygen supply. If the capacity is too large, oxygen supply may occur. Insufficient; if the capacity is not large, it cannot be promoted on a large scale and industrialized

The residence time of the raw materials is relatively short, the fermentation may not be sufficient, and a secondary fermentation and aging device is needed to supplement it; there are many problems such as continuous feeding and continuous discharge, and the most important thing is that it occupies a large area and cannot form large-scale, industrialized, and engineering projects. streamlining

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