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Process for treating landfill leachate by high-temperature incineration

A technology for landfill leachate and leachate, which is applied in incinerators, combustion methods, combustion types, etc., can solve the problems of evaporation moisture heat loss and other problems, and achieve the effects of reducing labor costs, improving economic benefits, and improving thermal energy utilization.

Active Publication Date: 2019-11-01
源创环境科技有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a leachate treatment process with high utilization rate of heat energy, zero pollution discharge, low operation cost, safe and reliable, through the combination of phase change heat storage and sensible heat storage, to recover the evaporated moisture emitted by evaporation There is a large amount of latent and sensible heat in the system, and the recovered heat energy continues to return to the system for leachate treatment, which solves the problem of heat loss in the evaporated moisture during the high-temperature treatment of leachate, and improves the heat energy utilization of the high-temperature incineration treatment leachate system rate, reducing the cost of leachate treatment

Method used

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  • Process for treating landfill leachate by high-temperature incineration

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Embodiment Construction

[0029] Attached below figure 1 Make a detailed description of the specific implementation steps of the invention.

[0030] Such as figure 1 A high-temperature incineration process for treating landfill leachate shown includes a start-up phase S1, a feed phase S2, and a circulation phase S3.

[0031] The feature of the start-up phase S1 is:

[0032] S1-1, close the flue gas valve 404 at one end of the incinerator 4, start the combustion burner 402 to increase the temperature inside the incinerator 4 to above 900°C, and spray atomized leachate into the leachate starting inlet 401. The atomized leachate is mixed with high-temperature flue gas in the incinerator 4 for heat exchange, and is quickly vaporized during the heat exchange process. During the high-temperature incineration process, the harmful organic components in the leachate are decomposed into CO, CO 2 、CH 4 Small molecular gases such as ammonia nitrogen and other inorganic components are decomposed into NO, NO 2...

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Abstract

The invention discloses a process for treating landfill leachate by high-temperature incineration. The process for treating the landfill leachate by the high-temperature incineration involves a preheating system, an evaporative crystallization system, a phase-change heat storage system, and an incineration system; and the implementation characteristic comprises a starting stage S1, a feeding stageS2 and a circulation stage S3. According to the process, phase change heat storage and sensible heat storage are combined and used, a large amount of latent heat and sensible heat in evaporated moisture discharged by evaporation are recycled, recycled heat continues back into a system for treating the leachate, the problem of heat loss in evaporated moisture in an existing high-temperature treatment process of the leachate is solved, so that the heat energy utilization rate of the high-temperature incineration treatment leachate system is further improved, and the process is a leachate treatment process which is high in heat energy utilization rate, free of pollution emission, low in operation cost, safe and reliable.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, and in particular relates to a high-temperature incineration process for treating garbage leachate. Background technique [0002] The moisture content and organic component content of municipal solid waste are relatively high. After sanitary landfill treatment, the organic components in the garbage dump undergo complex organic degradation, and gather with the water in the garbage dump to form a large amount of leachate. Landfill leachate has high ammonia nitrogen content and chemical oxygen demand, and contains a large number of organic components and toxic and harmful impurities. It must be further treated to meet the standards before it can be discharged into the environment. [0003] At present, the traditional process of "pretreatment + membrane bioreaction system + nanofiltration + reverse osmosis" is usually used to treat the landfill leachate of domestic waste, but after treatmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/04F23G5/44F23G5/46F23G5/02
CPCF23G5/02F23G5/44F23G5/446F23G5/46F23G7/04
Inventor 王建军张雄
Owner 源创环境科技有限公司
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