Method for treating domestic garbage through steam pyrolysis

Abstract

This invention discloses a highly effective pyrolytic processing method of city living garbage. This method adopts the steam pyrolytic technology, and puts the garbage into the pressure container for pyrolysis, preserves the heat 0.5-1.5 hours when the steam temperature is 200-250 deg. C, the pressure is 1.6-2.5 MPa, and then lowers the temperature to 120-150 deg. C, at the pressure of 0.2-0.5 MPa sprays the garbage to the collecting storehouse, and then selects to form the fuel and the farming soil. This invention effectively improves the garbage disposal effects, totally realizes the harmlessness, and further reaches the quantity-reducing.

Description

technical field [0001] The invention relates to the technology of urban pollution control, in particular to a high-efficiency steam pyrolysis treatment method of urban domestic garbage. Background technique [0002] There are generally three ways to deal with domestic waste at home and abroad: sanitary landfill, incineration, and composting. There are many problems in the three methods. For example, sanitary landfill needs to occupy a large amount of land, and it is difficult to reuse resources and avoid secondary pollution. The incineration method requires a large investment and a long payback period. Fertilizer can recycle part of the organic resources, but first of all, it is necessary to separate the organic matter from the inorganic matter in the garbage, and there are requirements for the content of organic matter. Primary mixed waste is difficult to avoid causing secondary pollution. After retrieving Chinese patents, there are not many invention patents using high-t...

AI Technical Summary

Problems solved by technology

There are many problems in the three methods. For example, sanitary landfill needs to occupy a large amount of land, and it is difficult to reuse resources and avoid secondary pollution. The incineration method requires a large investment and a long payback period. Fertilizer can recycle part of the organic resources, but first of all, it is necessary to separate the organic matter from the inorganic matter in the garbage, and there are requirements for the content of organic matter. It is difficult to avoid secondary pollution caused by primary mixed garbage

After retrieving Chinese patents, there are not many invention patents using high-temperature steam technology to treat garbage, such as: application numbers 981028675, 98117233.4, 00120763.6, 00124817.0, 01107176.1, 02135869.9. Although these patented technical solutions solve some traditional landfill methods, incineration methods and composting However, due to the problems in the selected steam pyrolysis process parameters, the treatment effect is not ideal, especially the low temperature (temperature t<200°C), which limits the treatment effect and efficiency. great influence

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