City life rubbish fluidized bed gasification combustion processing method

Abstract

The invention is a fluid bed gasification and combustion processing method for urban garbage. The hearth of a fluid bed garbage furnace (4) is composed of two parts of a low temperature gasification area and a high temperature combustion area, additives (f) such as limestone, kaolin, etc. are added to the garbage furnace (4); acid gases such as chlorine, sulfur, nitrogen, etc. are removed in the furnace; and the generation of dioxin is controlled in the furnace. A water cooling spiral slag cooler (5) and a vibration sieve (6) can be utilized to efficiently reduce heat loss of slag and recycle bed materials. The whole system requires no addition of auxiliary fuel, and has the characteristics of safe reliability, no odor emission, low investment and operating cost, less secondary pollutant discharge, high power generation efficiency, etc.

Description

technical field [0001] The invention relates to a gasification combustion treatment method in a fluidized bed of urban domestic garbage, and belongs to the technical field of incineration treatment of urban domestic garbage. Background technique [0002] According to statistics, the output of domestic garbage in my country is increasing at a rate of 8-10% every year, and the problem of garbage disposal is becoming more and more obvious. There are three main types of municipal solid waste treatment and disposal technologies: sanitary landfill, composting and incineration. Garbage sanitary landfill technology is the most mature, but the land resources available for landfill are in short supply, and later maintenance costs are high; garbage composting technology is relatively mature, but the product contains high heavy metal content, great potential hazards, and poor sales; garbage incineration technology has excellent The volume reduction effect can completely eliminate harmf...

AI Technical Summary

Problems solved by technology

The direct combustion process of the fluidized bed single furnace must have a relatively high furnace temperature, which will oxidize the heavy metals in the garbage and cannot achieve deep dechlorination in the furnace, which is not conducive to the recycling of heavy metals, and will produce dioxin-like organic pollutants, polluting surroundings

The gasification and melting process is relatively complicated, and foreign technologies have high requirements on waste composition and calorific value, so it is difficult to promote and apply them in my country; domestic technologies are not yet mature

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