Method and system for drying aerobic organisms in urban raw garbage by aid of hot air

Abstract

The invention provides a method and a system for drying aerobic organisms in urban raw garbage by the aid of hot air. Organic matters in the urban raw garbage are decomposed into moisture and other inorganic matters by the aerobic microorganisms in the urban raw garbage with high-temperature biological conditioners by the aid of oxygen provided by the hot air and a formed high-temperature environment, heat is released, most of the moisture is heated and evaporated into steam by the high-temperature environment and the heat, the steam is exhausted in a wet and hot waste gas form, garbage leachate is formed by an additional part of the moisture and drained, and the purpose of drying the aerobic organisms in the urban raw garbage is achieved. The system comprises an urban raw garbage aerobic organism drying bin, a hot-air auxiliary drying device, an air feeder, an exhaust fan, a liquid delivery pump and the like. The method and the system further can be optimized by means of automatic control, waste gas preheating, photocatalytic sterilization and deodorization and the like. The method and the system for drying the aerobic organisms by the aid of the hot air have the advantages that the decomposition degree of the organic matters in the urban raw garbage and moisture evaporation capacity are high, a drying process is short, a drying effect is obvious, and the garbage is treated in a harmless, reducing and stable manner.

Description

technical field [0001] The invention relates to the technical field of municipal solid waste treatment, in particular to the garbage drying process in the production of refuse derived fuel (RDF), specifically a hot air-assisted aerobic biological drying method and system for municipal solid waste. Background technique [0002] my country's garbage has not been completely sorted from the source. The proportion of kitchen waste in urban domestic garbage is large, and its moisture content and organic matter content are high, which is not conducive to the harmless, reduction, stabilization, and recycling of garbage. [0003] The high moisture content makes the raw garbage difficult to sort and break, especially unfavorable for the use of all mechanical garbage sorting equipment, resulting in the misery of garbage recycling and reuse. [0004] The high content of organic matter causes the biochemical properties of the garbage to be unstable, and a large amount of leachate and ran...

AI Technical Summary

Problems solved by technology

[0006] Steam decomposition, mechanical dehydration and other technologies are used to dry waste. First, it needs to provide fuel for steam production or electricity and other disposable energy to generate power, which is a waste of energy. Second, some steam drying technologies use incineration and waste derivatives. Products, etc. produce steam, and flue gas treatment after incineration is a very important link. The investment and operating costs of treatment equipment are relatively high, and problems such as re-pollution caused by incomplete incineration or incomplete flue gas treatment often occur.

[0007] At present, the garbage biological drying method is generally used at home and abroad to remove most of the water in the garbage through aerobic or anaerobic biochemical processes; Large, high energy consumption, large investment, or a series of problems such as new waste water and waste gas pollution in the process of treatment

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