A device and method for back-spraying denitrification of leachate from a garbage incinerator

A technology for landfill leachate and waste incinerator, which is applied in the field of denitrification treatment technology, can solve problems such as failure to form, and achieve the effects of low price, simple and easy method, and strong practicability.

Active Publication Date: 2018-01-05
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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  • A device and method for back-spraying denitrification of leachate from a garbage incinerator
  • A device and method for back-spraying denitrification of leachate from a garbage incinerator
  • A device and method for back-spraying denitrification of leachate from a 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 garbage incinerator leachate return spray denitrification device and method, comprising a garbage leachate spray gun array, a thermocouple of a first flue, an infrared thermometer, an SNCR spray gun array, and a sensor at the outlet of the flue. The method is to precipitate and filter the leachate and mix it with ammonia water. According to the temperature value, perform flow control and automatic shutdown and clean water cleaning, and adjust the SNCR injection flow rate and the mixed concentration of ammonia water until the NOX value at the flue outlet reaches the requirement. . It can make full use of the leachate back-spray operation, mix ammonia water and combine with SNCR for overall denitrification, reduce the water and compressed air injected into the denitrification system, ensure the temperature of the boiler furnace, and greatly reduce the clean water, compressed air and electricity dosage. The device is low in price and strong in practicability, the method adopted is simple and easy to implement, and meets the requirements of environmental protection, and can be widely used in various waste incineration power plants, and has broad application prospects.

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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Patent Type & Authority Patents(China)
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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