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Harmless treatment method of household garbage

A technology for harmless treatment of domestic waste, applied in the direction of combustion product treatment, combustion methods, incinerators, etc., can solve the problems of environmental pollution, excessive dioxin emissions, etc., and achieve sufficient waste incineration, improved heat separation efficiency, The effect of short working time

Inactive Publication Date: 2017-06-13
CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, a large number of small incinerators are used to treat rural domestic waste and urban domestic waste. Most of the incinerators have not adopted dioxin control facilities, resulting in excessive dioxin emissions and serious environmental pollution.

Method used

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  • Harmless treatment method of household garbage

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Experimental program
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Effect test

Embodiment 1

[0031] Firstly, the domestic waste is sorted to remove large bricks, stones and other objects, and dehydration is carried out with an extrusion device to obtain a moisture content of 50%; then the pretreated domestic waste is passed through the feed port ( 1) Put it into the pyrolysis furnace body (2), connect the pyrolysis tail gas treatment system, start the vacuum pump (11) to make the pyrolysis furnace process in a vacuum state, the system pressure is 25kpa, and use electric heating to heat through the heating device (3) The furnace body (2) is heated, the heating temperature is controlled at 200°C, and the heating time is 60 minutes. The chlorine-containing plastics in the domestic waste are carbonized and degraded in a vacuum state, and the water vapor and pyrolysis gas generated by the carbonized degradation are mixed. The gas is introduced into the water cooling tower (9) and the activated carbon tower (10) for separation and purification, and then discharged into the a...

Embodiment 2

[0033]Firstly, the domestic waste is sorted to remove large bricks, stones and other objects, and dehydration is carried out with a squeezing device, so that the moisture content of the domestic waste is 48%; then the pretreated domestic waste is passed through the feed port ( 1) Put it into the pyrolysis furnace body (2), connect the pyrolysis tail gas treatment system, start the vacuum pump (11) to make the pyrolysis furnace process in a vacuum state, the system pressure is 20kpa, and use microwave heating to heat the heat through the heating device (3). The furnace body (2) is heated, the heating temperature is controlled at 150°C, and the heating time is 30 minutes. The chlorine-containing plastics in the domestic waste are carbonized and degraded in a vacuum state, and the water vapor and pyrolysis gas generated by the carbonized degradation are mixed. The gas is introduced into the water cooling tower (9) and the activated carbon tower (10) for separation and purification...

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Abstract

The invention provides a harmless treatment method of household garbage. The harmless treatment method of household garbage comprises the following steps of: performing carbonization and degradation on the pretreated household garbage under vacuum; after low-temperature vacuum carbonization treatment, stopping heating; turning off a pyrolysis exhaust gas treatment system and a vacuum pump; turning on an incineration flue gas treatment system and a fan; opening an air inlet in the bottom of a pyrolysis furnace; igniting the household garbage after being subjected to the low-temperature vacuum carbonization at the air inlet; the household garbage completely and spontaneously combusts under the condition of sufficient oxygen content; the incineration exhaust gas is sequentially introduced into a water washing tower and an alkaline washing tower; the incineration exhaust gas is purified by the water washing tower and then is exhausted into the atmosphere by the fan; performing landfill treatment on the slag produced by the combustion of the household garbage; obtaining pyrolytic oil, taking the pyrolytic oil out of a water cooling tower, and delivering the pyrolytic oil to a cement rotary kiln for high-temperature incineration. According to the harmless treatment method of household garbage disclosed by the invention, the household garbage is incinerated after vacuum carbonization treatment, and dioxin generation during the treatment process is effectively controlled by using two different exhaust gas treatment processes.

Description

[0001] Technical field: [0002] The invention belongs to the field of solid waste treatment, and in particular relates to a harmless treatment method for domestic garbage. [0003] technical background: [0004] With the rapid urbanization and economic growth of our country, the population of major cities in our country is rapidly expanding, and the amount of urban garbage generated in major cities is huge, and the problem of garbage is becoming more and more prominent. At present, the most prominent and most urgent contradiction facing the harmless treatment of urban garbage in my country is the lack of construction capacity of treatment facilities. At present, cities in my country mainly use landfills to deal with garbage, and all urban garbage is facing the problem of no land to bury. On the other hand, garbage landfills have caused serious pollution of groundwater sources and soil, increasing pressure on the environment and ecology, and the siege of garbage has also affec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/02F23G5/04F23G5/027F23G5/10F23J15/06F23J15/02F23J15/04F23G7/12
CPCF23G5/02F23G5/027F23G5/04F23G5/10F23G7/12F23G2201/20F23G2201/301F23G2201/304F23G2201/60F23G2202/102F23G2204/20F23G2204/203F23G2209/28F23J15/02F23J15/04F23J15/06F23J2215/301
Inventor 易师周艳张柏林
Owner CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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