Hydrothermal degradation comprehensive processing technology for domestic garbage

Abstract

The invention discloses hydrothermal degradation comprehensive processing technology for domestic garbage. The technology is characterized by comprising the following steps of: rapidly degrading the garbage which is subjected to magnetic separation, feeding the wastewater produced during digestion into a water treatment device and discharging the water until the water reaches the standard; feeding the digested garbage into a separation device and burning the separated undegraded combustible, wherein a part of the combustion product is used as saturated steam during the hydrothermal degradation and the other part is used for providing heat or generating power; treating the smoke produced by the burning by using a smoke treatment system and discharging the smoke after the smoke reaches the standard, wherein the slag produced after the burning is used for paving roads or making bricks or used as covering soil at landfill sites; performing composting on the separated degraded nutritive soil, wherein the degraded nutritive soil is used for loosening soil or to be prepared into various organic compound fertilizers; and recycling the separated ferrous metal. The technology has the advantages of complete degradation, recycling of resources, heat supply, power generation and capability of ensuring the discharging of the smoke, the wastewater and the like after reaching the standards and realizing harmlessness, reduction and reutilization.

Description

Technical field: [0001] The invention relates to a wet-decomposition comprehensive treatment process for household garbage, and belongs to the technical field of garbage treatment. Background technique: [0002] At present, the treatment of municipal solid waste has become a key and difficult point in urban construction. On the one hand, the uncertainty and complexity of the components of municipal solid waste, and on the other hand, the secondary pollution problem in the process of treatment, the existing treatment methods mainly There are: landfill, compost, incineration. The country has formulated corresponding standards for the original domestic waste landfill, mainly for the anti-leakage, leachate treatment, and odor treatment of the waste landfill process. With the acceleration of urbanization, urban domestic waste The number of garbage has increased greatly, and it is becoming more and more difficult to select a landfill site. The above-mentioned treatment process is ...

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Problems solved by technology

The country has formulated corresponding standards for the original domestic waste landfill, mainly for the anti-leakage, leachate treatment, and odor treatment of the waste landfill process. With the acceleration of urbanization, urban domestic waste The number of garbage has increased greatly, and it is becoming more and more difficult to select a landfill site. The above-mentioned treatment process is mainly used in towns with a small amount of garbage and landfill conditions; composting requires a long processing time and takes up a lot of time. Land, and the non-degradable components in the composting process are difficult to treat, and this treatment process is rarely used at present; the original waste incineration process is a technology imported from abroad, which is suitable for the treatment of municipal solid waste with relatively high calorific value. At present, the composition of municipal solid waste in my country is complex, the calorific value is relatively low, and it is accompanied by a large amount of kitchen waste. During the incineration process of municipal solid waste of this composition, it is difficult to control Its incineration temperature cannot ensure the discharge of flue gas up to the standard

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