Anaerobic fermentation-incineration combined treatment method for organic wastes

Abstract

The invention discloses an anaerobic fermentation-incineration combined treatment method for organic wastes. The anaerobic fermentation-incineration combined treatment method is characterized by comprising the following steps of: firstly, crushing the organic wastes, feeding the crushed organic wastes into a slurry mixing pool to be mixed with water or a methane solution to form a fermentation raw material, and feeding the fermentation raw material into an anaerobic fermentation tank for anaerobic fermentation treatment; secondly, performing solid-liquid separation treatment on residual slurry to form the methane solution and dehydrated methane slag; thirdly, making partial methane solution flow back to the slurry mixing pool, discharging surplus methane solution outwards to a sewage treatment facility; fourthly, feeding the dehydrated methane slag into a methane slag drying machine by taking methane generated by the anaerobic fermentation tank as fuel for heating, wherein the moisture content of the dried methane slag is made lower than 40%; fifthly, incinerating the dried methane slag subjected to drying treatment by using the methane collected from the anaerobic fermentation tank as auxiliary fuel for methane slag combustion; and sixthly, producing steam or hot water by a waste heat boiler by using high-temperature flue gas discharged from a methane slag incineration furnace, and supplying the steam or the hot water to the fermentation tank to serve as a hot source for heating or heat insulating. According to the invention, the anaerobic fermentation and the incineration treatment are organically combined, the advantages of the anaerobic fermentation and the incineration treatment are fully exerted, and the reduction, harmlessness and the recycling of rubbish are facilitated.

Description

technical field [0001] The invention relates to a garbage treatment method, in particular to an organic waste treatment method, in particular to an anaerobic fermentation-incineration combined treatment method of organic waste. Background technique [0002] At present, with the development of cities and the increase of population, the output of organic waste represented by kitchen waste, kitchen waste, urban sludge, farmer’s market waste, and poultry manure is increasing rapidly. How to efficiently dispose of these organic wastes? The "reduction, harmless, and resourceful" treatment of waste has become a common concern of the society. [0003] For organic waste, anaerobic fermentation can generate biogas for energy recovery and utilization, but the volume reduction rate of solid matter is not high, and if the biogas residue cannot be utilized, there will be corresponding post-processing problems. The incineration method can meet the requirements of waste reductio...

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Problems solved by technology

[0005] The purpose of the present invention is to invent a combined anaerobic fermentation-incineration treatment method for organic waste in view of the problem that the existing organic waste has a high moisture content and is difficult to burn directly

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