WO2017159080A1 - 工業炉 - Google Patents

工業炉 Download PDF

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Publication number
WO2017159080A1
WO2017159080A1 PCT/JP2017/003322 JP2017003322W WO2017159080A1 WO 2017159080 A1 WO2017159080 A1 WO 2017159080A1 JP 2017003322 W JP2017003322 W JP 2017003322W WO 2017159080 A1 WO2017159080 A1 WO 2017159080A1
Authority
WO
WIPO (PCT)
Prior art keywords
combustion
exhaust gas
gas
industrial furnace
fuel gas
Prior art date
Application number
PCT/JP2017/003322
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
健介 川端
毅 有松
寿雄 惠上
Original Assignee
中外炉工業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 中外炉工業株式会社 filed Critical 中外炉工業株式会社
Publication of WO2017159080A1 publication Critical patent/WO2017159080A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • the present invention relates to an industrial furnace which supplies a fuel gas and combustion air to a combustion burner, burns the fuel gas in the furnace by the combustion burner, and discharges the combustion exhaust gas from the furnace through the exhaust pipe. It is a thing.
  • NOx nitrogen oxides harmful to the combustion exhaust gas
  • combustion exhaust gas is prevented from being discharged to the outside through the exhaust pipe in the state where unburned component gas such as CO gas or hydrocarbon gas (HC) is contained. is there.
  • a fuel gas and air for combustion are supplied to a combustion burner to heat the object to be heated, and the fuel gas is contained in the furnace by the combustion burner.
  • the combustion exhaust gas from the inside of the furnace is discharged through the exhaust pipe.
  • Patent Document 1 the combustion exhaust gas from a radiant tube burner is purified using a nitrogen oxide reduction catalyst, and the air ratio ⁇ (the actual amount of air) to the obtained NOx purification gas It has been proposed that after combustion air is added so that (theoretical air amount) becomes 1.0 or more, an oxidation catalyst is further used to oxidize and remove unburned components.
  • Patent Document 1 a first exhaust gas processing unit containing a nitrogen oxide reduction catalyst and a second exhaust gas processing unit containing an oxidation catalyst are provided. It is necessary to supply air between the exhaust gas processing unit and the second exhaust gas processing unit, and there is a problem that the apparatus becomes complicated and becomes large.
  • patent document 2 was limited in the kind and operating condition of a furnace to be used, and it was difficult to use it under various conditions in various furnaces.
  • the fuel gas and the combustion air are supplied to the combustion burner, the fuel gas is burned in the furnace by the combustion burner, and the combustion exhaust gas is discharged from the furnace through the exhaust pipe. It is an object of the present invention to solve the above-mentioned problems in an industrial furnace.
  • the fuel gas is supplied to the combustion burner with the fuel gas and the combustion air, and after the fuel gas is burned in the furnace by the combustion burner, the combustion exhaust gas is discharged from the furnace into the exhaust pipe.
  • the exhaust gases Prevents exhaust gases from being emitted outside when the exhaust gases contain harmful NOx and unburned gases such as CO gas and hydrocarbon (HC) gas.
  • the fuel gas and the combustion air are supplied to the combustion burner, and the fuel gas is burned in the furnace by the combustion burner,
  • the exhaust pipe is provided with an exhaust gas processing unit in which a three-way catalyst is accommodated.
  • NOx contained in the combustion exhaust gas is reduced by the unburned component gas contained in the combustion exhaust gas by the three-way catalyst contained in the exhaust gas processing unit.
  • the air ratio ⁇ of the combustion air is made 1.0 or less by reducing the amount of the combustion air to the fuel gas, NOx generated at the time of combustion
  • the amount of NOx decreases and the NOx contained in the combustion exhaust gas decreases, and the NOx contained in the combustion exhaust gas is sufficiently reduced by the three-way catalyst by the unburned component gas contained in the combustion exhaust gas.
  • the fuel gas for guiding a part of the fuel gas supplied to the combustion burner to a position upstream of the exhaust gas processing unit provided in the exhaust pipe in the exhaust gas discharge direction Preferably, a guideway and control means for controlling the amount of fuel gas guided through the fuel gas guideway are provided.
  • the amount of fuel gas guided through the fuel gas guide path is controlled in accordance with the amount of nitrogen oxide contained in the combustion exhaust gas.
  • the fuel gas is supplied to the combustion burner with the amount of the combustion air relative to the fuel gas increased.
  • the above-mentioned control is carried out before the above-mentioned exhaust gas is led to the exhaust gas processing unit containing the three-way catalyst through the exhaust pipe.
  • a proper amount of fuel gas is supplied through the fuel gas guiding path by means. In this way, the combustion exhaust gas containing a large amount of NOx and the appropriate amount of fuel gas are brought together to the exhaust gas treatment unit, and the NOx in the combustion exhaust gas is sufficiently reduced by the action of the three-way catalyst. Will be discharged.
  • a post-combustion device is provided to burn the In this way, even if unburned component gas remains in the combustion exhaust gas processed in the exhaust gas processing unit, the unburned component gas is burned by the post-combustion device and oxidized to CO 2 or H 2 O. As a result, the unburned component gas is prevented from being discharged.
  • heat exchange means for heating the combustion air by the heat of the combustion exhaust gas is provided, and the combustion air heated by the heat exchange means is supplied to the combustion burner. It is preferable to In this way, the heat of the combustion exhaust gas can be effectively used to perform efficient combustion.
  • the fuel gas and the combustion air are supplied to the combustion burner, the fuel gas is burned in the furnace, and the combustion exhaust gas is discharged from the furnace through the exhaust pipe.
  • an exhaust gas processing unit containing a three-way catalyst is provided in the exhaust pipe, and the above-mentioned combustion exhaust gas is led to the above-mentioned exhaust gas processing unit, and harmful NOx in the combustion exhaust gas, or CO gas or hydrocarbon (HC) The unburned component gas consisting of gas was properly treated.
  • the exhaust gas processing unit when the fuel gas is mixed with the combustion air and burned in the furnace, NOx and unburned component gas in the combustion exhaust gas are provided in the exhaust pipe, the exhaust gas processing unit The exhaust gas can be properly discharged to the outside through the exhaust pipe in a safe state where the combustion exhaust gas is properly treated and NOx and unburned component gas are not contained in the combustion exhaust gas.
  • a combustion burner 12 is provided on the furnace wall 11 of the furnace 10, and the combustion burner 12 is provided with hydrocarbons (through fuel gas supply pipe 21) HC)
  • a fuel gas such as a gas is supplied and at the same time a combustion air is supplied through a combustion air supply pipe 22, and the fuel gas and the combustion air are mixed in the combustion burner 12 to make the fuel gas in the furnace 10. I am trying to burn it.
  • an exhaust pipe 13 for discharging the combustion exhaust gas after burning the fuel gas in the furnace 10 in this manner from the inside of the furnace 10 is provided, and the exhaust gas processing unit 23 in which the three-way catalyst is accommodated in the exhaust pipe 13 is provided.
  • the combustion exhaust gas after combustion in the furnace 10 is introduced to the exhaust gas processing unit 23 through the exhaust pipe 13 so that the three-way catalyst accommodated in the exhaust gas processing unit 23 processes the combustion exhaust gas. .
  • the fuel gas and the combustion air are supplied to the combustion burner 12 through the fuel gas supply pipe 21 and the combustion air supply pipe 22, NOx generated during the combustion can be obtained.
  • the amount of combustion air to the fuel gas is reduced, for example, the air ratio ⁇ of the combustion air is set to 1.0 or less so that the fuel gas is burned in the combustion burner 12. Do.
  • combustion is performed more than the exhaust gas processing unit 23 provided in the exhaust pipe 13
  • a post-combustion device 24 is provided at a position downstream of the exhaust gas discharge direction, and a post-combustion fuel gas from the post-combustion fuel gas supply pipe 24a and a post-combustion air are provided to the post-combustion device 24 if necessary.
  • the post combustion air is supplied from the supply pipe 24b.
  • the unburned component gas remaining in the combustion exhaust gas discharged from the exhaust gas processing unit 23 is burned in the post-combustion device 24 and the unburned component gas is CO 2 gas And H 2 O are oxidized and discharged.
  • the unburned component gas is The combustion device 24 burns and is processed, and the unburned component gas can be reliably prevented from being discharged.
  • the post-combustion device 24 is used to burn the unburned component gas remaining in the combustion exhaust gas with a flame, but the post-combustion device 24 is not limited to such a device, such as electric heating
  • the unburned component gas remaining in the combustion exhaust gas can also be burned by
  • the heat exchange unit (heat exchange means) 25a for heating the combustion air by the heat of the combustion exhaust gas is provided in the exhaust pipe 13 for guiding the combustion exhaust gas from the inside of the furnace 10 to the exhaust gas processing unit 23.
  • the heat exchange section 25a is provided with a combustion air guide pipe 25b for guiding the combustion air, and the heating air supply pipe 25c for supplying the combustion air heated in the heat exchange section 25a to the combustion burner 12 Is provided.
  • the combustion air is guided to the heat exchange unit 25a through the combustion air guide pipe 25b, and the heat exchange unit 25a burns the heat by the heat of the combustion exhaust gas.
  • the heating air is heated, and thus heated combustion air is supplied to the combustion burner 12 through the heating / combustion air supply pipe 25c, and the combustion air and fuel gas thus heated are burned.
  • the fuel gas is burned in the furnace 10 by mixing at 12.
  • the heat exchange unit 25a is provided in the exhaust pipe 13. However, the heat exchange unit 25a may be provided outside the exhaust pipe 13.
  • the fuel gas supplied to the combustion burner 12 through the fuel gas supply pipe 21 is A fuel gas guiding passage 26 for guiding a part of the exhaust gas processing unit 23 provided in the exhaust pipe 13 to a position upstream of the exhaust gas in the discharge direction, and the fuel gas guiding passage 26 burns in the exhaust gas processing unit 23
  • a control valve (control means) 26a is provided to control the amount of fuel gas supplied to the exhaust pipe 13 at a position upstream of the exhaust gas discharge direction.
  • the fuel gas guide passage is controlled by the control valve 26 a in correspondence to the amount of NOx contained in the combustion exhaust gas after being burned in the combustion burner 12.
  • the amount of fuel gas supplied to the exhaust pipe 13 at a position upstream of the exhaust gas processing unit 23 in the discharge direction of exhaust gas from the exhaust gas processing unit 23 is controlled.
  • the air ratio of the combustion air is increased.
  • the amount of combustion air to fuel gas is increased such that ⁇ exceeds 1.0 and the fuel gas is burned in the above-described combustion burner 12, the fuel gas is burned by a sufficient amount of combustion air.
  • unburned component gas such as CO gas and hydrocarbon (HC) gas in the combustion exhaust gas decreases, a large amount of NOx is generated at the time of combustion, and a large amount of the NOx is contained in the combustion exhaust gas.
  • the control valve 26a causes the fuel gas guide passage 26 to flow upstream of the exhaust gas processing portion 23 in the exhaust gas discharge direction.
  • the amount of fuel gas guided to the exhaust pipe 13 at the position is controlled to supply an appropriate amount of fuel gas to a position upstream of the exhaust gas processing unit 23 in the exhaust gas discharge direction, and a large amount of NOx is contained. It is made to guide to the exhaust gas processing part 23 which accommodated the three-way catalyst together with the combustion exhaust gas.
  • a post-combustion device 24 is provided in the exhaust pipe 13 at a position downstream of the exhaust gas processing unit 23 in the exhaust gas discharge direction.
  • the heat exchange unit 25a for heating the combustion air by the heat of the combustion exhaust gas is provided, and the combustion air to be heated is guided to the heat exchange unit 25a.
  • a combustion air guide pipe 25b is provided, and a heating combustion air supply pipe 25c for supplying the combustion air heated in the heat exchange section 25a to the combustion burner 12 is provided.
  • the combustion air is guided to the heat exchange unit 25a through the combustion air guide pipe 25b, and this thermal In the exchange section 25a, the combustion air is heated by the heat of the combustion exhaust gas, and the heated combustion air is supplied to the combustion burner 12 through the heating / combustion air supply pipe 25c to heat the combustion burner 12 Air and fuel gas are mixed in the combustion burner 12 so that the fuel gas is burned in the furnace 10.
  • the heat of the combustion exhaust gas can be effectively used, and the exhaust gas from the furnace 10 can be used.
  • the temperature of the combustion exhaust gas led to the processing unit 23 decreases, and the temperature of the combustion exhaust gas is prevented from exceeding the temperature range where the three-way catalyst contained in the exhaust gas processing unit 23 is used.
  • the catalyst can properly treat the exhaust gas for combustion.
  • the amount of fuel gas guided through the fuel gas guide path 26 is increased, which is required to reduce NOx in the combustion exhaust gas to N 2.
  • the exhaust gas processing unit 23 discharges the combustion exhaust gas in which the unburned component gas remains.
  • the unburned component gas remaining in the combustion exhaust gas discharged from the exhaust gas processing unit 23 is burned in the post-combustion device 24, The gas can be oxidized to CO 2 gas or H 2 O and discharged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chimneys And Flues (AREA)
  • Air Supply (AREA)
  • Combustion Of Fluid Fuel (AREA)
PCT/JP2017/003322 2016-03-15 2017-01-31 工業炉 WO2017159080A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-051224 2016-03-15
JP2016051224A JP6525909B2 (ja) 2016-03-15 2016-03-15 工業炉

Publications (1)

Publication Number Publication Date
WO2017159080A1 true WO2017159080A1 (ja) 2017-09-21

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PCT/JP2017/003322 WO2017159080A1 (ja) 2016-03-15 2017-01-31 工業炉

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JP (1) JP6525909B2 (zh)
TW (1) TWI686570B (zh)
WO (1) WO2017159080A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023176186A (ja) 2022-05-31 2023-12-13 中外炉工業株式会社 工業用炉の排気システム

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05200251A (ja) * 1991-08-29 1993-08-10 Osaka Gas Co Ltd 天然ガスの燃焼方法及び天然ガス用燃焼器
JPH07133905A (ja) * 1993-11-10 1995-05-23 Tokyo Gas Co Ltd 窒素酸化物低発生交番燃焼方法
US5500194A (en) * 1994-05-04 1996-03-19 Petrocon Technologies, Inc. Hybrid low NOx process for destruction of bound nitrogen compounds
US5626086A (en) * 1993-10-12 1997-05-06 Nce Concepts, Ltd. Method and apparatus for controlling a waste disposal system
JP2000130706A (ja) * 1998-10-26 2000-05-12 Mitsubishi Heavy Ind Ltd ボイラ排ガス中の酸素減少方法
JP2001106506A (ja) * 1999-10-06 2001-04-17 Mitsubishi Electric Corp 改質器用燃焼装置
JP2003275543A (ja) * 2002-03-22 2003-09-30 Japan Steel Works Ltd:The 廃棄物焼却炉の排気ガス処理方法
JP2008114115A (ja) * 2006-11-01 2008-05-22 Miura Co Ltd 有害物質低減システム
WO2015052772A1 (ja) * 2013-10-08 2015-04-16 株式会社岩本 焼却炉および焼却炉施設
JP2015530551A (ja) * 2012-07-13 2015-10-15 アルストム テクノロジー リミテッドＡＬＳＴＯＭ Ｔｅｃｈｎｏｌｏｇｙ Ｌｔｄ 煙道ガス再循環および触媒コンバータを備えるガスタービン発電プラント

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE505202T1 (de) 1996-02-08 2011-04-15 Cancer Advances Inc Immunologische methoden zur behandlung von gastrointestinalem krebs
CN103868066A (zh) * 2014-03-20 2014-06-18 北京科技大学 一种多级燃烧辐射管加热装置

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05200251A (ja) * 1991-08-29 1993-08-10 Osaka Gas Co Ltd 天然ガスの燃焼方法及び天然ガス用燃焼器
US5626086A (en) * 1993-10-12 1997-05-06 Nce Concepts, Ltd. Method and apparatus for controlling a waste disposal system
JPH07133905A (ja) * 1993-11-10 1995-05-23 Tokyo Gas Co Ltd 窒素酸化物低発生交番燃焼方法
US5500194A (en) * 1994-05-04 1996-03-19 Petrocon Technologies, Inc. Hybrid low NOx process for destruction of bound nitrogen compounds
JP2000130706A (ja) * 1998-10-26 2000-05-12 Mitsubishi Heavy Ind Ltd ボイラ排ガス中の酸素減少方法
JP2001106506A (ja) * 1999-10-06 2001-04-17 Mitsubishi Electric Corp 改質器用燃焼装置
JP2003275543A (ja) * 2002-03-22 2003-09-30 Japan Steel Works Ltd:The 廃棄物焼却炉の排気ガス処理方法
JP2008114115A (ja) * 2006-11-01 2008-05-22 Miura Co Ltd 有害物質低減システム
JP2015530551A (ja) * 2012-07-13 2015-10-15 アルストム テクノロジー リミテッドＡＬＳＴＯＭ Ｔｅｃｈｎｏｌｏｇｙ Ｌｔｄ 煙道ガス再循環および触媒コンバータを備えるガスタービン発電プラント
WO2015052772A1 (ja) * 2013-10-08 2015-04-16 株式会社岩本 焼却炉および焼却炉施設

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Publication number Publication date
TWI686570B (zh) 2020-03-01
TW201734365A (zh) 2017-10-01
JP6525909B2 (ja) 2019-06-05
JP2017166732A (ja) 2017-09-21

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