Method and device for power generation through household garbage incineration

Abstract

The invention discloses a method and device for power generation through household garbage incineration. The method comprises the following steps that (1) bio-drying is conducted, specifically, household garbage is put in a closed bio-drying chamber, an air blower is started for aerobic fermentation to make the moisture content of the household garbage be lowered to 25% or below, and the lower calorific value is larger than 2500 Kcal / kg; (2) bio-drying products obtained in the step (1) are screened into iron metal, nonmagnetic metal, inert materials, plastics and dried garbage, the dried garbage enters a stoker incinerator for incineration, and the rest is subjected to landfill treatment; and (3) high-temperature flue gas generated after incineration of the stoker incinerator of the step (2) heats water in a gas waste heat steam boiler, and generated steam drives a steam turbine generator unit to generate power. According to the method and device for power generation through household garbage incineration, after subjected to bio-drying, the originally generated city household garbage enters the stoker incinerator for incineration, the high-temperature steam generated by waste heat drives a steam turbine generator to generate power, and thus quantity reduction, recycling and harmless treatment of the household garbage are achieved.

Description

technical field [0001] The invention belongs to the field of domestic garbage treatment and comprehensive utilization in the municipal solid waste industry, and in particular relates to a method for generating electricity by incinerating domestic garbage. Background technique [0002] At present, my country's municipal solid waste has the characteristics of high moisture content, high organic matter content and low calorific value. The long-term mixed collection of garbage collection and transportation also leads to the extremely complex composition of the garbage entering the treatment facilities. The above-mentioned characteristics of MSW in my country lead to a series of technical problems in the process of waste treatment: (1) high moisture and high viscosity lead to poor adaptability of mechanical sorting technology; (2) low quality of waste compost; (3) high content of organic matter As a result, the landfill leachate load is high and the treatment is difficult; (4) Th...

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Problems solved by technology

The long-term mixed collection of garbage collection and transportation also leads to the extremely complex composition of the garbage entering the treatment facilities

The above-mentioned characteristics of MSW in my country lead to a series of technical problems in the process of waste treatment: (1) high moisture and high viscosity lead to poor adaptability of mechanical sorting technology; (2) low quality of waste compost; (3) high content of organic matter As a result, the landfill leachate load is high and the treatment is difficult; (4) The high water content and high organic matter content also lead to an increase in the design capacity of waste treatment facilities; (5) The high water content and low calorific value lead to high cost and low efficiency of waste incineration inferior

Garbage is stored in the storage pit for about 7 days, and 20% to 30% of the landfill leachate will be produced. The power plant needs to set up an independent leachate treatment facility, which is difficult and expensive

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