WO2013054546A1 - Chaudière pour substance à chauffer - Google Patents

Chaudière pour substance à chauffer Download PDF

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Publication number
WO2013054546A1
WO2013054546A1 PCT/JP2012/051157 JP2012051157W WO2013054546A1 WO 2013054546 A1 WO2013054546 A1 WO 2013054546A1 JP 2012051157 W JP2012051157 W JP 2012051157W WO 2013054546 A1 WO2013054546 A1 WO 2013054546A1
Authority
WO
WIPO (PCT)
Prior art keywords
combustion air
fuel gas
differential pressure
flow rate
recuperator
Prior art date
Application number
PCT/JP2012/051157
Other languages
English (en)
Japanese (ja)
Inventor
遼太 宮崎
一信 井上
靖国 田中
浩 小澤
貴之 阿彌
Original Assignee
三浦工業株式会社
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 三浦工業株式会社 filed Critical 三浦工業株式会社
Priority to CN201280043388.2A priority Critical patent/CN103782101B/zh
Priority to KR1020147002784A priority patent/KR101841508B1/ko
Publication of WO2013054546A1 publication Critical patent/WO2013054546A1/fr

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • 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 a heat medium boiler provided with a recuperator that preheats combustion air by exchanging heat between exhaust gas discharged from a boiler that burns gaseous fuel and combustion air that is sent to a burner using a blower.
  • This application claims priority based on Japanese Patent Application No. 2011-225475 for which it applied to Japan on October 13, 2011, and uses the content here.
  • the heat medium boiler circulates between the equipment (loading equipment) that indirectly uses the heat of the high-temperature heat medium oil and the heat medium boiler, and heat medium oil to the required temperature (250 ° C to 300 ° C).
  • the heat medium boiler may be used at a high temperature, and since the temperature of the heat medium oil to be heated is around 300 ° C., the exhaust gas temperature after being heated by the heat medium boiler becomes 350 ° C. or more, and the energy that is taken away. Is big.
  • the boiler efficiency of a small once-through steam boiler is about 92%, whereas the heat efficiency of a heat medium boiler is as low as about 80%.
  • a method of reducing the exhaust gas temperature by heat exchange between the boiler exhaust gas and the combustion air is used (see, for example, Patent Document 1 and Patent Document 2).
  • the object of the present invention is to increase the temperature of combustion air by exchanging heat with exhaust gas using a recuperator, thereby increasing the pressure loss of the recuperator section and reducing the amount of combustion air.
  • An object of the present invention is to provide a heat-medium boiler that can prevent and maintain a stable combustion state.
  • the invention described in claim 1 is configured to exchange heat between exhaust gas discharged from a boiler that burns gaseous fuel and combustion air that is sent to a burner using a blower.
  • a heating medium boiler with a recuperator for preheating which controls a fuel gas supply line that supplies gaseous fuel to the burner, an inverter that changes the rotational speed of the blower, a fuel gas flow rate adjustment valve, and a fuel gas flow rate adjustment valve
  • a differential pressure detection means for detecting a pressure before and after the recuperator to obtain a differential pressure.
  • the control means calculates a combustion air amount from the differential pressure detected by the differential pressure detection means.
  • the fuel gas flow rate adjusting valve is controlled according to the combustion air amount, and when the change in the combustion air amount exceeds a predetermined range, the control means controls the combustion air amount to be within the predetermined range. Thereby adjusting the frequency of the over data, and controls the fuel gas flow control valve in accordance with the said combustion air amount.
  • the control means when the combustion air becomes a high temperature by exchanging heat with the exhaust gas by the recuperator and the pressure difference between the inlet side and the outlet side of the recuperator changes, the control means The amount of combustion air is calculated from the differential pressure detected by the pressure detection means, the fuel gas flow rate adjusting valve is controlled according to the amount of combustion air, and the fuel gas flow rate is decreased according to the decreased amount of combustion air. Therefore, a stable combustion state can be maintained. Further, even if the change in the combustion air amount exceeds a predetermined range, the control means adjusts the frequency of the inverter so that the combustion air amount falls within the predetermined range, and the fuel gas is adjusted in accordance with the combustion air amount. Since the flow rate adjusting valve is controlled, the amount of combustion does not change greatly, stable combustion properties can be maintained, and the temperature of the heat transfer oil can be heated to a predetermined temperature.
  • the invention according to claim 2 is a heat medium boiler comprising a recuperator that preheats combustion air by exchanging heat between exhaust gas discharged from a boiler that burns gaseous fuel and combustion air that is sent to a burner using a blower.
  • a fuel gas supply line for supplying gaseous fuel to the burner, an inverter for changing the rotational speed of the blower, a fuel gas flow rate adjustment valve, a control means for controlling the fuel gas flow rate adjustment valve, and the front and rear of the recuperator
  • a differential pressure detecting means for detecting a differential pressure to obtain a differential pressure
  • the control means corresponds to the differential pressure and differential pressure on the inlet side and outlet side of the recuperator corresponding to a specific combustion amount and heat medium temperature.
  • Each inverter frequency is stored, and the inverter frequency is controlled to a frequency corresponding to the detected differential pressure.
  • the control means when the combustion air becomes a high temperature by exchanging heat with the exhaust gas by the recuperator and the pressure difference between the inlet side and the outlet side of the recuperator is changed, the control means includes the inverter Is controlled to the frequency of the stored numerical value corresponding to the differential pressure detected by the differential pressure detecting means, so that the combustion air amount can be made to follow the combustion amount while the combustion amount is constant.
  • the temperature of the heat transfer oil can be heated to a predetermined temperature.
  • the combustion air amount is calculated based on the pressure difference between the inlet side and the outlet side of the recuperator, and when the combustion air amount changes due to the temperature change of the combustion air, the changed combustion air amount Since the fuel gas flow rate is changed so that the air-fuel ratio becomes constant according to air, a stable combustion state can be maintained.
  • the change in the combustion air amount exceeds a predetermined range, the frequency of the inverter is adjusted so that the combustion air amount is within the predetermined range, and the fuel gas flow rate is adjusted in accordance with the combustion air amount.
  • the combustion amount does not change greatly, the stable combustibility can be maintained, and the temperature of the heat transfer oil can be heated to a predetermined temperature.
  • the numerical values of the inlet pressure and the outlet pressure differential corresponding to the specific combustion amount and the temperature of the heat transfer oil, and the inverter frequency corresponding to the differential pressure are stored, and the inverter frequency is detected. Since the frequency of the stored numerical value corresponding to the pressure difference between the inlet side and the outlet side of the recuperator is controlled, the combustion air amount can be made to follow the combustion amount with a constant combustion amount, and stable. While maintaining combustibility, the temperature of the heat transfer oil can be heated to a predetermined temperature.
  • FIG. 1 is a schematic configuration diagram showing an example of an embodiment of a heat medium boiler according to the present invention.
  • a burner 2 is arranged at the top, and a combustion chamber 5 is formed inside a can body 4 in which a heat medium oil heating tube 3 is formed in a coil shape.
  • the burner 2 is attached to a wind box 6 provided on the upper portion of the can 4, and includes a blower 8 that sends combustion air to the wind box 6 through an air supply duct 7.
  • the blower 8 is provided with an inverter 9, and by controlling the frequency of the inverter 9, the rotational speed of the blower 8 can be controlled to control the amount of combustion air.
  • an exhaust gas duct 10 Connected to the can 4 is an exhaust gas duct 10 that discharges the exhaust gas that burns in the combustion chamber 5 and passes through the gap between the coiled heat transfer oil heating tubes 3 to the atmosphere.
  • a recuperator 11 connected to the exhaust gas duct 10 and the air supply duct 7 is provided, and the combustion air preheated by exchanging heat between the exhaust gas flowing through the exhaust gas duct 10 and the combustion air flowing through the air supply duct 7. It is supposed to be.
  • a fuel gas supply line 12 for supplying fuel gas is connected to the burner 2.
  • the fuel gas supply line 12 is provided with a fuel gas flow rate adjustment valve 13 for supplying fuel gas to the burner 2.
  • the air supply duct 7 is provided with a differential pressure detection means 15 constituted by pressure sensors 14 provided on the inlet side and the outlet side of the recuperator 11, and the recuperator that flows through the air supply duct 7 by the differential pressure detection means 15. 11 detects the pressure of the combustion air on the inlet side and the outlet side 11, obtains the differential pressure, and transmits it to the control means 16.
  • a differential pressure detection means 15 constituted by pressure sensors 14 provided on the inlet side and the outlet side of the recuperator 11, and the recuperator that flows through the air supply duct 7 by the differential pressure detection means 15. 11 detects the pressure of the combustion air on the inlet side and the outlet side 11, obtains the differential pressure, and transmits it to the control means 16.
  • the control means 16 calculates the combustion air amount based on the differential pressure between the inlet side and the outlet side of the recuperator 11 detected by the differential pressure detection means 15, and controls the fuel gas flow rate adjusting valve 13 according to the combustion air quantity.
  • the fuel gas corresponding to the amount of combustion air is supplied to the burner 2, and when the change in the amount of combustion air exceeds a predetermined range, the frequency of the inverter 9 is adjusted so that the amount of combustion air falls within the predetermined range.
  • it has a first function of controlling the fuel gas flow rate adjustment valve 13 in accordance with the amount of combustion air.
  • the predetermined range related to the amount of combustion air is the amount of combustion required to maintain the temperature of the heat transfer oil, and the range of the amount of combustion air that becomes a predetermined air-fuel ratio with respect to this amount of combustion. Point to.
  • the control means 16 stores the numerical values of the frequency of the inverter 9 corresponding to the differential pressure and the differential pressure between the inlet side and the outlet side of the recuperator 11 corresponding to a specific combustion amount and heat medium temperature,
  • the frequency of the inverter 9 is controlled to a frequency corresponding to the detected differential pressure, and the air-fuel ratio is constant with respect to the fuel gas flow rate supplied in accordance with the combustion amount necessary for heating to the desired heat transfer oil temperature. It has the 2nd function which supplies the amount of combustion air so that it may become.
  • the priority order of the first function and the second function can be arbitrarily selected.
  • the recuperator 11 heat-exchanges the exhaust gas flowing through the exhaust gas duct 10 and the combustion air flowing through the air supply duct 7 to preheat the combustion air
  • the high-temperature combustion air expands to increase its volume, increase the flow velocity, increase the pressure loss in the recuperator 11 part, and reduce the air volume.
  • the pressure of combustion air on the inlet side and outlet side of the recuperator 11 flowing through the air supply duct 7 is detected by a differential pressure detecting means 15 constituted by pressure sensors 14 provided on the inlet side and outlet side of the recuperator 11.
  • the differential pressure is obtained and transmitted to the control means 16.
  • the combustion air amount is calculated by calculating the pressure difference between the inlet side and the outlet side of the recuperator 11 detected by the differential pressure detecting means 15.
  • the fuel gas flow rate adjustment valve 13 is controlled in accordance with the combustion air amount. That is, heat exchange with the exhaust gas expands to a high temperature, the volume increases, the flow rate increases, and the fuel gas flow rate is reduced in accordance with the reduced amount of combustion air.
  • the change in the combustion air amount exceeds a predetermined range, that is, the reduction in the combustion air amount exceeds the range of the combustion air amount required to maintain a specific combustion amount and heat medium temperature.
  • the frequency of the inverter 9 is adjusted so that the amount of combustion air is within a predetermined range, and the fuel gas flow rate adjustment valve 13 is controlled in accordance with the amount of combustion air to maintain a specific combustion amount and heat medium temperature. Therefore, the amount of combustion air required for this is adjusted, and the fuel gas flow rate is adjusted according to the amount of combustion air.
  • the control unit 16 When the second function is selected in the control unit 16, when the differential pressure on the inlet side and the outlet side of the recuperator 11 detected by the differential pressure detection unit 15 is transmitted to the control unit 16, the control unit 16 The frequency of the inverter 9 is controlled to the stored numerical frequency corresponding to the differential pressure on the inlet side and the outlet side of the recuperator 11 detected by the differential pressure detecting means 15. That is, the combustion air heated to a high temperature by exchanging heat with exhaust gas expands and increases in volume, and the amount of combustion air reduced by increasing the flow velocity and pressure loss becomes the specific combustion amount and heat medium temperature. The amount is increased according to the amount of fuel gas supplied.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Air Supply (AREA)

Abstract

La présente invention concerne une chaudière pour substance à chauffer (1) pourvue d'un récupérateur (11) qui préchauffe l'air de combustion en amenant l'air de combustion et le gaz évacué par la chaudière à échanger de la chaleur l'un avec l'autre. La chaudière pour substance à chauffer (1) est pourvue d'une conduite d'alimentation en gaz combustible (12) qui fournit le gaz combustible à un brûleur (2), un inverseur (9) qui modifie la vitesse de rotation d'un ventilateur (8), une vanne de réglage du débit de gaz combustible (13), un moyen de commande (16) qui commande la vanne de réglage du débit de gaz combustible (13), et un moyen de détection d'une différence de pression (15) qui détecte une différence de pression à travers le récupérateur (11). Le moyen de commande (16) calcule la quantité d'air de combustion en fonction de la différence de pression détectée et commande la vanne de réglage du débit de gaz combustible (13) selon la quantité calculée d'air de combustion. Lorsqu'une modification de l'air de combustion dépasse une plage prédéterminée, le moyen de commande (16) règle la fréquence de l'inverseur (9) et commande la vanne de réglage du début de gaz combustible (13) selon la quantité d'air de combustion.
PCT/JP2012/051157 2011-10-13 2012-01-20 Chaudière pour substance à chauffer WO2013054546A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201280043388.2A CN103782101B (zh) 2011-10-13 2012-01-20 载热体锅炉
KR1020147002784A KR101841508B1 (ko) 2011-10-13 2012-01-20 열매 보일러

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-225475 2011-10-13
JP2011225475A JP5370457B2 (ja) 2011-10-13 2011-10-13 熱媒ボイラ

Publications (1)

Publication Number Publication Date
WO2013054546A1 true WO2013054546A1 (fr) 2013-04-18

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ID=48081610

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Application Number Title Priority Date Filing Date
PCT/JP2012/051157 WO2013054546A1 (fr) 2011-10-13 2012-01-20 Chaudière pour substance à chauffer

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Country Link
JP (1) JP5370457B2 (fr)
KR (1) KR101841508B1 (fr)
CN (1) CN103782101B (fr)
WO (1) WO2013054546A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106123008B (zh) * 2016-07-08 2018-11-27 深圳市亿和精密科技集团有限公司 一种安全高效锅炉鼓风装置
CN106123009B (zh) * 2016-07-08 2019-04-19 新昌县大船畈生物科技有限公司 一种锅炉鼓风装置
JP6831200B2 (ja) * 2016-09-21 2021-02-17 リンナイ株式会社 燃焼装置
CN106287806B (zh) * 2016-09-29 2019-01-08 长沙开元仪器股份有限公司 一种高温燃烧炉的流量自动控制系统及其工作方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02298719A (ja) * 1989-05-11 1990-12-11 Babcock Hitachi Kk 空気予熱器性能診断方法
JPH10267266A (ja) * 1997-03-28 1998-10-09 Miura Co Ltd 燃焼装置

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JPS6060419A (ja) * 1983-09-13 1985-04-08 Kurabo Ind Ltd 燃焼制御装置
JPS63187004A (ja) * 1987-01-30 1988-08-02 三菱重工業株式会社 ボイラプラント
JPH0587332A (ja) * 1991-09-27 1993-04-06 Sanyo Electric Co Ltd ガスバーナの制御装置
JPH10213320A (ja) * 1997-01-28 1998-08-11 Kawasaki Thermal Eng Co Ltd 三位置制御ボイラの燃焼制御方法
JP2000130988A (ja) * 1998-10-23 2000-05-12 Ishikawajima Harima Heavy Ind Co Ltd 再生式空気予熱器の温度制御装置
JP4059100B2 (ja) * 2003-02-20 2008-03-12 三浦工業株式会社 ボイラの監視方法およびその装置
JP4057491B2 (ja) * 2003-08-04 2008-03-05 株式会社サムソン 送風機回転速度と通風路流路面積の増減を行う燃焼装置
KR100599170B1 (ko) * 2005-04-29 2006-07-12 주식회사 경동네트웍 풍압센서를 이용한 공연비 제어 보일러 및 그것의 공연비제어방법
JP5358895B2 (ja) * 2007-04-13 2013-12-04 三浦工業株式会社 燃焼装置
CN101672482A (zh) * 2009-10-13 2010-03-17 夏学苏 工业炉窑优化配风控制系统
DE102010012005A1 (de) * 2010-03-15 2011-09-15 Dürr Systems GmbH Thermische Abluftreinigungsanlage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02298719A (ja) * 1989-05-11 1990-12-11 Babcock Hitachi Kk 空気予熱器性能診断方法
JPH10267266A (ja) * 1997-03-28 1998-10-09 Miura Co Ltd 燃焼装置

Also Published As

Publication number Publication date
KR20140077878A (ko) 2014-06-24
JP2013087958A (ja) 2013-05-13
CN103782101A (zh) 2014-05-07
JP5370457B2 (ja) 2013-12-18
KR101841508B1 (ko) 2018-03-23
CN103782101B (zh) 2016-03-23

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