CN109631598A - A kind of all-oxygen combustion glass kiln denitration system and method based on flue gas recirculating technique - Google Patents

A kind of all-oxygen combustion glass kiln denitration system and method based on flue gas recirculating technique Download PDF

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Publication number
CN109631598A
CN109631598A CN201811483417.2A CN201811483417A CN109631598A CN 109631598 A CN109631598 A CN 109631598A CN 201811483417 A CN201811483417 A CN 201811483417A CN 109631598 A CN109631598 A CN 109631598A
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CN
China
Prior art keywords
flue gas
module
flue
temperature
waste heat
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811483417.2A
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Chinese (zh)
Inventor
贺建雄
肖琴
王嘉健
黄小叶
谢东恒
符有杰
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Te Bo Science And Technology Ltd Of Hainan Air China
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Te Bo Science And Technology Ltd Of Hainan Air China
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Priority to CN201811483417.2A priority Critical patent/CN109631598A/en
Publication of CN109631598A publication Critical patent/CN109631598A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004Systems for reclaiming waste heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/008Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00Arrangements of controlling devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00Arrangements of controlling devices
    • F27D2019/0028Regulation
    • F27D2019/0031Regulation through control of the flow of the exhaust gases
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The invention belongs to flue gases purification fields, and in particular to a kind of all-oxygen combustion glass kiln denitration system and method based on flue gas recirculating technique, using the low N of tail portion low temperature2Flue gas recirculation, 1400 ~ 1550 DEG C of high-temperature flue gas come out with glass furnace mix, and flue-gas temperature are down to 850 ~ 1050 DEG C, then carry out denitration using SNCR technology.A kind of all-oxygen combustion glass kiln denitration system and method based on flue gas recirculating technique proposed by the present invention, process is succinct, builds less investment, and system equipment takes up little area.Flue gas cool-down process does not introduce N2, will not occur to generate thermal NOxSide reaction, operation investment denitrfying agent it is few.

Description

A kind of all-oxygen combustion glass kiln denitration system and method based on flue gas recirculating technique
Technical field
The invention belongs to flue gases purification fields, and in particular to a kind of all-oxygen combustion glass based on flue gas recirculating technique Glass kiln denitrating system and method.
Background technique
Currently, the discharge flue gas of the glass furnace of all-oxygen combustion, without any denitration process, NOxRow Putting concentration can reach 400 ~ 700mg/Nm3, it is just met for " flat glass industry atmosphere pollutants emission standards " (GB26453- 2011) requirement, but as Environmental Protection Situation is increasingly severe, the NO of some areas provincial standardxDischarge standard has been adjusted to 400mg/Nm3Or even the discharge standard in priority control area is 100mg/Nm3If or else cannot by processing direct emission Meet the environmental requirement being increasingly stringenter.
At present in the most widely used SCR denitration technology in denitration of glass furnace fume field, larger, equipment land occupation is invested Greatly, equipment operation investment is more, in processing low concentration of NOxIn the case where it is very uneconomical.
For opposite SCR technology, the equipment investment of SNCR technology is less.The flue-gas temperature of glass furnace for pure oxygen combustion discharge It is 1400 ~ 1550 DEG C, the optimal reaction temperature of SNCR denitration technology is 850 ~ 1050 DEG C.If utilizing flue Temperature fall to SNCR Reaction temperature region, required place are larger.Cold air is directly participated at vertical gas pass position, flue-gas temperature is down to 850 ~ 1050 DEG C, then when being passed through cold air, the N of introducing2Meeting and O2Reaction generates a large amount of thermal NOx, increase the investment of denitrfying agent.
Summary of the invention
To overcome above-mentioned the deficiencies in the prior art, the invention proposes a kind of all-oxygen combustions based on flue gas recirculating technique Glass kiln denitration system and method, using the low N in tail portion2The low-temperature flue gas of atmosphere recycles, come while reaching flue gas cool-down not Occur to increase NOxThe purpose of the side reaction of concentration.
The present invention adopts the following technical solutions to accomplish the above objectives:
A kind of all-oxygen combustion glass kiln denitration system based on flue gas recirculating technique, all-oxygen combustion glass kiln denitration system have Temperature monitoring and automatic control module, denitrfying agent supply module, waste heat recycling module and desulfurization and dedusting module;The temperature prison It surveys and automatic control module, denitrfying agent supply module, waste heat recycling module and desulfurization and dedusting module is successively set on glass furnace On flue between exhanst gas outlet and chimney;The all-oxygen combustion glass kiln denitration system also has recirculating gas duct;It is described Flue between the front end connection glass furnace outlet of recirculating gas duct and waste heat recycling module, rear end and desulfurization and dedusting module and Flue between chimney is connected;Setting will be will pass through waste heat recycling between the recirculating gas duct and desulfurization and dedusting module And the low N2N of low temperature of desulfurization and dedusting processing2Clean flue gas is sent into the air-introduced machine between glass furnace outlet and waste heat recycling module II, under the action of air-introduced machine II exports positive pressure, by the low N of low temperature by waste heat recycling and desulfurization and dedusting processing2Clean flue gas, By flue gas recirculation flue, it is sent into glass furnace and exports the flue being connected with waste heat recycling module.
Air-introduced machine I is additionally provided on flue between the waste heat recycling module and desulfurization and dedusting module.
On the recirculating gas duct, electric adjustable section door, and the air-introduced machine are provided between air-introduced machine II and chimney Electric adjustable section door between II and chimney is located at after the rear end of recirculating gas duct.
The temperature monitoring and automatic control module, the setting of denitrfying agent supply module are in glass furnace fume outlet and waste heat Between recycling module;And before the temperature monitoring and automatic control module, denitrfying agent supply module are located at recirculating gas duct After end.
A kind of all-oxygen combustion glass kiln denitration method based on flue gas recirculating technique, using air-introduced machine II and recycles cigarette Road will recycle by waste heat, the low N of the low temperature after desulfurization and dedusting2Flue gas is sent into the outlet end of glass furnace fume, makes itself and glass The flue gas of kiln gas outlet end discharge carries out hybrid cooling, 1400 ~ 1550 DEG C of high-temperature flue-gas that glass furnace is come out 850 ~ 1050 DEG C of temperature needed for being down to SNCR denitration, N low with low temperature2The mixed flue gas of flue gas is in denitrfying agent supply module Supply is lower to carry out denitration reaction;Temperature monitoring and automatic control module are given special by the temperature and feedback signal of monitoring mixed flue gas Fixed automatic control program controls the aperture of the electric adjustable section door on recirculating gas duct and the electric adjustable section door before chimney, to adjust The exhaust gas volumn for saving recycling, enables the temperature stability contorting of mixed flue gas in the SNCR reaction temperature window.
A kind of all-oxygen combustion glass kiln denitration system and method based on flue gas recirculating technique proposed by the present invention uses The low N in tail portion2The low-temperature flue gas of atmosphere recycles, and does not occur to increase NO while having reached flue gas cool-downxThe mesh of the side reaction of concentration , process is succinct, builds less investment, and system equipment takes up little area.Flue gas cool-down process does not introduce N2, will not occur to generate heat Power type NOxSide reaction, operation investment denitrfying agent it is few.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of denitrating system of the invention.
In figure, 1, cut-off gate;2, recirculating gas duct interface;3, temperature monitoring and automatic control module;4, denitrfying agent is supplied Module;5, flue;6, door is adjusted;7, waste heat recycling module;8, flue;9, recirculating gas duct;10, air-introduced machine I;11, desulfurization removes Dirt module;12, air-introduced machine II;13, electric adjustable section door;14, chimney.
Specific embodiment
The present invention is illustrated with reference to the drawings and specific embodiments:
As shown in Figure 1, a kind of all-oxygen combustion glass kiln denitration system based on flue gas recirculating technique, all-oxygen combustion glass furnace is de- Nitre system has temperature monitoring and automatic control module 3, denitrfying agent supply module 4, waste heat recycling module 7 and desulfurization and dedusting module 11;The temperature monitoring and automatic control module 3, denitrfying agent supply module 4, waste heat recycling module 7 and desulfurization and dedusting module 11 are successively set on the flue 5 between glass furnace fume outlet and chimney 14;The all-oxygen combustion glass kiln denitration system System also has recirculating gas duct 9;Between the front end connection glass furnace outlet of the recirculating gas duct 9 and waste heat recycling module Flue, the flue between rear end and desulfurization and dedusting module and chimney are connected;The recirculating gas duct 9 and desulfurization and dedusting module The low N of low temperature will pass through waste heat recycling and desulfurization and dedusting processing is set between 112Clean flue gas is sent into glass furnace outlet Air-introduced machine II 12 between waste heat recycling module 7, air-introduced machine II 12 export positive pressure under the action of, will by waste heat recycling and The low N of low temperature of desulfurization and dedusting processing2Clean flue gas is sent into glass furnace outlet and is recycled with waste heat by flue gas recirculation flue 9 The connected flue of module 7.
Air-introduced machine I 10 is additionally provided on flue between the waste heat recycling module 7 and desulfurization and dedusting module 11.
On the recirculating gas duct 9, it is provided with electric adjustable section door 13 between air-introduced machine 12 II and chimney, and described draws Electric adjustable section door 13 between blower II 12 and chimney is located at after the rear end of recirculating gas duct 9.
The temperature monitoring and automatic control module 3, the setting of denitrfying agent supply module 4 glass furnace fume outlet with it is remaining Between heat recovery module 7;And the temperature monitoring and automatic control module 3, denitrfying agent supply module 4 are located at recirculating gas duct After 9 front end.
A kind of all-oxygen combustion glass kiln denitration method based on flue gas recirculating technique, using air-introduced machine II 12 and recycles Flue 9 will recycle by waste heat, the low N of the low temperature after desulfurization and dedusting2Flue gas is sent into the outlet end of glass furnace fume, makes itself and glass The flue gas of glass kiln gas outlet end discharge carries out hybrid cooling, 1400 ~ 1550 DEG C of high-temperature flue gas temperature that glass furnace is come out 850 ~ 1050 DEG C of temperature are spent needed for being down to SNCR denitration, N low with low temperature2The mixed flue gas of flue gas is in denitrfying agent supply module Denitration reaction is carried out under 4 supply;The temperature and feedback signal that temperature monitoring and automatic control module 3 pass through monitoring mixed flue gas To specific automatic control program, the electric adjustable section door 13 on recirculating gas duct 9 and the electric adjustable section door 13 before chimney are controlled Aperture enables the temperature stability contorting of mixed flue gas in the SNCR reaction temperature window to adjust the exhaust gas volumn of recycling.

Claims (5)

1. a kind of all-oxygen combustion glass kiln denitration system based on flue gas recirculating technique, it is characterised in that: all-oxygen combustion glass Kiln denitrating system has temperature monitoring and automatic control module, denitrfying agent supply module, waste heat recycling module and desulfurization and dedusting mould Block;The temperature monitoring and automatic control module, denitrfying agent supply module, waste heat recycling module and desulfurization and dedusting module are successively It is arranged on the flue between glass furnace fume outlet and chimney;The all-oxygen combustion glass kiln denitration system also has again Cycle flue;The recirculating gas duct front end connection glass furnace outlet waste heat recycling module between flue, rear end with Flue between desulfurization and dedusting module and chimney is connected;Between the recirculating gas duct and desulfurization and dedusting module setting to By the low N of low temperature by waste heat recycling and desulfurization and dedusting processing2Clean flue gas is sent into glass furnace outlet and waste heat recycling module Between air-introduced machine II, air-introduced machine II export positive pressure under the action of, will by waste heat recycling and desulfurization and dedusting processing low temperature Low N2Clean flue gas is sent into glass furnace and exports the flue being connected with waste heat recycling module by flue gas recirculation flue.
2. a kind of all-oxygen combustion glass kiln denitration system based on flue gas recirculating technique as described in claim 1, feature It is: is additionally provided with air-introduced machine I on the flue between the waste heat recycling module and desulfurization and dedusting module.
3. a kind of all-oxygen combustion glass kiln denitration system based on flue gas recirculating technique as described in claim 1, feature Be: on the recirculating gas duct, being provided with electric adjustable section door between air-introduced machine II and chimney, and the air-introduced machine II with Electric adjustable section door between chimney is located at after the rear end of recirculating gas duct.
4. a kind of all-oxygen combustion glass kiln denitration system based on flue gas recirculating technique as described in claim 1, feature Be: the temperature monitoring and automatic control module, the setting of denitrfying agent supply module are returned in glass furnace fume outlet with waste heat It receives between module;And the temperature monitoring and automatic control module, denitrfying agent supply module are located at the front end of recirculating gas duct Later.
5. being taken off using a kind of all-oxygen combustion glass kiln denitration system based on flue gas recirculating technique described in claim 1 The method of nitre, it is characterised in that: using air-introduced machine II and recirculating gas duct will be recycled by waste heat, the low temperature after desulfurization and dedusting it is low N2Flue gas is sent into the outlet end of glass furnace fume, it is made to carry out mixing drop with the flue gas of glass furnace fume outlet end discharge Temperature, 850 ~ 1050 DEG C of temperature needed for 1400 ~ 1550 DEG C of high-temperature flue-gas that glass furnace comes out are down to SNCR denitration, with The low N of low temperature2The mixed flue gas of flue gas carries out denitration reaction under the supply of denitrfying agent supply module;Temperature monitoring and automatic control Molding block gives specific automatic control program by the temperature and feedback signal of monitoring mixed flue gas, controls on recirculating gas duct The aperture of electric adjustable section door before electric adjustable section door and chimney enables the temperature of mixed flue gas to adjust the exhaust gas volumn of recycling Stability contorting is in the SNCR reaction temperature window.
CN201811483417.2A 2018-12-06 2018-12-06 A kind of all-oxygen combustion glass kiln denitration system and method based on flue gas recirculating technique Pending CN109631598A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
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CN111473655A (en) * 2020-04-15 2020-07-31 攀钢集团西昌钢钒有限公司 Belt type roasting machine process air circulation system
CN111595168A (en) * 2020-06-02 2020-08-28 福建龙净脱硫脱硝工程有限公司 Chain grate-rotary kiln denitration system and method

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CN107469595A (en) * 2017-09-19 2017-12-15 浙江工匠环境科技有限公司 A kind of dust removal integrated device and method of waste gas of industrial kiln and furnace desulphurization denitration
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CN204563929U (en) * 2015-04-20 2015-08-19 靳新令 Industrial Boiler high temperature desulfurizing device
CN106178870A (en) * 2015-05-07 2016-12-07 嘉兴新嘉爱斯热电有限公司 A kind of SNCR-SCR combines flue gas denitrification system
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111473655A (en) * 2020-04-15 2020-07-31 攀钢集团西昌钢钒有限公司 Belt type roasting machine process air circulation system
CN111595168A (en) * 2020-06-02 2020-08-28 福建龙净脱硫脱硝工程有限公司 Chain grate-rotary kiln denitration system and method

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