Leachate back-spraying denitration device and method for garbage incinerator

A waste incinerator and landfill leachate technology, which is applied in the field of denitrification treatment process, can solve the problems of failure to form, and achieve the effects of low price, simple and easy method, and wide application prospects

Active Publication Date: 2015-12-16
GZEPI HUACHENG ENVIRONMENTAL PROTECTION ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, SNCR and landfill leachate back-spraying are independent systems, failing to form a unified and coordinated denitrification whole

Method used

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  • Leachate back-spraying denitration device and method for garbage incinerator
  • Leachate back-spraying denitration device and method for garbage incinerator
  • Leachate back-spraying denitration device and method for garbage incinerator

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Embodiment

[0034] Such as Figures 1 to 3 shown. The leachate back-spray denitrification device of the garbage incinerator of the present invention includes a leachate injection control system, an SNCR spray gun control system, an array of garbage leachate spray guns arranged on the wall of the incinerator chamber, and a thermocouple 3 arranged in the first flue of the waste heat boiler And infrared thermometer 4, set the SNCR spray gun array at the first flue of the waste heat boiler, set the NO at the outlet of the waste heat boiler flue X Sensor 8 and O 2 sensor 9;

[0035] The SNCR spray gun control system and leachate injection control system, NO X Sensor 8 and O 2 Sensor 9 is connected.

[0036]The landfill leachate spray gun array is composed of 4 spray guns, namely A spray gun 1, B spray gun 10, C spray gun 2 and D spray gun 11, the flow rate of each spray gun is independently controlled, and the height is located at 3 / 5 of the furnace height; Among these 4 spray guns, A sp...

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Abstract

The invention discloses a leachate back-spraying denitration device and method for a garbage incinerator. The device comprises a garbage leachate spray gun array, a thermocouple of a first flue, an infrared thermometer, an SNCR spray gun array and a sensor at a flue outlet. The method comprises the steps that leachate is firstly precipitated and filtered and is mixed with ammonium hydroxide, and according to the temperature value, flow control, automatic closing, clean water washing, adjustment on the mixed concentration of SNCR jet flow and ammonium hydroxide are carried out till the NOX value at the flue outlet meets the requirement. The leachate back-spraying operation can be sufficiently utilized, overall denitration is carried out through combination of mixed ammonium hydroxide and SNCR, water and compressed air sprayed into a denitration system are reduced, the temperature of a hearth of a boiler is guaranteed, and the usage amount of clean water, compressed air and electric power is greatly reduced. The device is low in price and high in practicability. The adopted method is simple, convenient and feasible and meets the requirement for environment protection. The method can be widely applied to various garbage incineration power plants and is wider in application prospect.

Description

technical field [0001] The invention relates to a denitration treatment process, in particular to a denitrification device and method for backspraying leachate of a garbage incinerator. Background technique [0002] During the stacking process of garbage in the domestic waste incineration plant, due to biochemical degradation such as anaerobic fermentation, rainwater washing, and organic matter decomposition, complex wastewater with high concentrations of inorganic or organic components is formed, that is, landfill leachate. Untreated landfill leachate pollutes water sources and soil through groundwater, thereby causing serious impacts on the surrounding environment and human health. Therefore, it is necessary to carry out harmless treatment of landfill leachate, so as to effectively control the pollution of leachate. [0003] At present, the treatment of landfill leachate is mainly based on biochemical methods, but this treatment process has disadvantages such as complex p...

Claims

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Application Information

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IPC IPC(8): F23G7/04C02F9/10
Inventor 马晓茜胡志锋
Owner GZEPI HUACHENG ENVIRONMENTAL PROTECTION ENERGY CO LTD
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