Device and method for controlling NOx during burning

A nitrogen oxide, combustion technology, applied in combustion methods, chemical instruments and methods, combustion products treatment, etc., can solve the problems of unadjustable, unpredictable chlorine content in urban solid waste streams, etc., to save usage, reduce Long-term environmental problems, the effect of reducing operating costs

Inactive Publication Date: 2017-01-04
EVERBRIGHT ENVIRONMENTAL PROTECTION TECH RES INST SHENZHEN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even though the range of chlorine levels can be roughly tracked through historical data for a particular waste-to-energy plant, the chlorine content of municipal solid waste streams is unpredictable and not adjustable

Method used

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  • Device and method for controlling NOx during burning
  • Device and method for controlling NOx during burning

Examples

Experimental program
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Embodiment 1

[0047] Below, refer to figure 1 and figure 2 The device for controlling nitrogen oxides of the present invention is described in detail, wherein, figure 1 It is a structural schematic diagram of the ammonium sulfate system described in the device for controlling nitrogen oxides of the present invention; figure 2 It is a structural schematic diagram of the device for controlling nitrogen oxides in the present invention.

[0048] In order to solve the problems in the prior art, the present invention provides a combustion method and device for controlling nitrogen oxides. x content, prepare a certain concentration of ammonium sulfate solution, spray the ammonium sulfate solution into the incinerator through the SNCR system, and the ammonium sulfate will be completely decomposed into NH at a temperature above 513°C 3 and SO 2 , where NH 3 Ions and NO in combustion flue gas x A reduction reaction occurs to form N 2 , so as to reduce NO in combustion flue gas x the goal of...

Embodiment 2

[0077] An embodiment of the present invention provides a control method based on the device described in Embodiment 1, the method comprising:

[0078] Step S1: configuring the ammonium sulfate salt into an ammonium sulfate salt solution, and transporting the ammonium sulfate salt solution to the metering mixing distribution system;

[0079] Step S2: adjusting the ammonium sulfate salt solution in the metering mixing distribution system to obtain the ammonium sulfate salt solution of the target concentration;

[0080] Step S3: transporting the ammonium sulfate salt solution with a target concentration to the spray layer system and spraying it into the incinerator through the spray layer system to reduce the nitrogen oxides produced by combustion.

[0081] Wherein, the concentration of the ammonium sulfate salt solution in the step S1 is 40wt% or above.

[0082] Wherein, the ammonium sulfate salt includes ammonium sulfate and ammonium bisulfate.

[0083] In the present inventi...

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Abstract

The invention relates to a device and a method for controlling NOx during burning. The device comprises an ammonium sulfate system, a metering, mixing and distributing system and an ejecting layer system which are communicated sequentially, the ammonium sulfate system is used for preparing an ammonium sulfate solution and delivering the same to the metering, mixing and distributing system, the metering, mixing and distributing system is used for calculating and adjusting concentration of the ammonium sulfate solution and delivering the ammonium sulfate solution to the ejecting layer system, and the ejecting layer system is used for ejecting the ammonium sulfate solution with target concentration into an incinerator to reduce NOx generated during burning. The device and the method have the advantages that NH3 reduces fuel-type NOx generated by garbage on the basis of principles of an SNCR (selective non-catalytic reaction) system into N2, so that NOx emission is reduced.

Description

technical field [0001] The invention relates to domestic waste incineration, in particular to a device and control method for controlling nitrogen oxides in combustion. Background technique [0002] The most mature nitrogen oxide control (denitration) technology used in power plants at home and abroad is selective reduction and denitrification technology, including selective catalytic reduction (SCR) denitrification technology and selective non-catalytic reduction (SNCR) system. [0003] Selective catalytic reduction (SCR) is the use of ammonia (NH 3 ) to nitrogen oxides (NO x ) reduction function, under the condition of 300 ~ 400 ℃, use the catalytic effect of the catalyst to efficiently reduce nitrogen oxides to nitrogen and water which are not polluting to the atmosphere. The denitrification rate of SCR can reach more than 85%, which can effectively control NO x emissions. Due to the high cost of catalyst and independent reactor, the application of SCR in waste-to-ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/79B01D53/56F23G5/44F23G5/50F23J15/04
CPCB01D53/79B01D53/56B01D2251/206B01D2258/0291F23G5/44F23G5/50F23J15/003F23J15/006F23J15/04F23J2215/10F23J2219/20
Inventor 张汉威唐武蒋雪玲
Owner EVERBRIGHT ENVIRONMENTAL PROTECTION TECH RES INST SHENZHEN CO LTD
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