WO2019015486A1 - 一种醇基燃料汽化燃烧装置 - Google Patents

一种醇基燃料汽化燃烧装置 Download PDF

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Publication number
WO2019015486A1
WO2019015486A1 PCT/CN2018/094759 CN2018094759W WO2019015486A1 WO 2019015486 A1 WO2019015486 A1 WO 2019015486A1 CN 2018094759 W CN2018094759 W CN 2018094759W WO 2019015486 A1 WO2019015486 A1 WO 2019015486A1
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Prior art keywords
combustion
alcohol
pipe
based fuel
evaporation
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PCT/CN2018/094759
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English (en)
French (fr)
Inventor
崔玉峰
房爱兵
邢双喜
靳景伟
杨晓誉
阮信议
Original Assignee
清远市精旺环保设备有限公司
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Publication of WO2019015486A1 publication Critical patent/WO2019015486A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/101—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet
    • F23D11/102—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet in an internal mixing chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/38—Nozzles; Cleaning devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/44—Preheating devices; Vaporising devices
    • F23D11/441—Vaporising devices incorporated with burners

Definitions

  • the invention belongs to the field of combustion devices, and in particular relates to an alcohol-based fuel vaporization combustion device.
  • Alcohol-based fuel is a liquid fuel synthesized by chemical blending with alcohol (methanol, ethanol, etc.) as a main raw material according to a specific process formula. It is a clean fuel and can be widely used in boilers, furnaces, and melting. Aluminum furnace and other industries.
  • burners burning alcohol-based fuels generally adopt a spray combustion mode, but since the latent heat of vaporization of alcohols, especially methanol, is relatively large, for example, the latent heat of vaporization of methanol is about four times that of diesel, which may result in a furnace or a combustion chamber. Local low temperature areas cause incomplete combustion and emissions of formaldehyde and other pollutants.
  • a method of pre-evaporating the fuel into a gas may be adopted.
  • a method of heating the fuel container by electricity or flue gas is generally used, for example, patent CN201410223125.0, CN201620300450.7, CN201611102615.0, CN201520498520.X, etc. .
  • these methods have complicated systems, difficult fuel control, inflexible adjustment, and the like, and there are safety hazards such as gas leakage or container explosion.
  • the present invention provides an alcohol-based fuel vaporization combustion device, which is safe and reliable to use and convenient to control.
  • An alcohol-based fuel vaporization combustion device comprises a casing, wherein the casing is provided with an air transmission pipe and a combustion port connected to each other, a burner is arranged at the combustion port, an evaporation pipe is connected to the combustion nozzle, and a high temperature is connected to the evaporation pipe.
  • the gas supply pipe has an atomizing nozzle in the evaporation pipe, and the atomizing nozzle is connected with the fuel pipe.
  • the evaporation conduit is located at the center of the air delivery conduit, and the evaporation conduit is disposed coaxially with the air delivery conduit.
  • the atomizing nozzle is located at the center of the evaporation duct facing away from the end of the burner.
  • a swirler is disposed between the air delivery duct and the combustion port.
  • the burner is fixed to the central axis of the cyclone and extends into the combustion port.
  • the high temperature gas supply pipe is connected to a high temperature flue gas pipe.
  • the invention is provided with an evaporation pipeline, the high-temperature gas supply pipeline passes the high-temperature gas into the evaporation pipeline, the atomization nozzle sprays the alcohol-based fuel into the evaporation pipeline, the atomized alcohol-based fuel vaporizes after the high-temperature gas, and the vaporized fuel mixes the high-temperature gas through the combustion.
  • the nozzle is injected into the combustion port and mixed with the air delivered by the air delivery pipe.
  • the alcohol-based fuel is vaporized and then burned.
  • the local low temperature zone in the furnace or the combustion chamber is eliminated, the generation of incomplete combustion products is avoided, and the pollutant emission is reduced.
  • the combustion efficiency and fuel utilization rate are improved; on the other hand, the combustion of the alcohol-based fuel after being vaporized with the high-temperature gas can lower the maximum flame temperature in the furnace or the combustion chamber, which can reduce the emission of nitrogen oxides.
  • the vaporization of the alcohol-based fuel after mixing with the high-temperature gas is also advantageous for shortening the flame, and at the same time, the flame stability can be improved because the temperature of the mixed gas is higher than that of the normal temperature air.
  • Figure 1 is a schematic view of the structure of the present invention.
  • an alcohol-based fuel vaporization combustion apparatus includes a casing 1 in which an air delivery duct 11 and a combustion port 12 are connected to each other, and the air delivery duct 11 delivers air to the combustion port 12 for combustion.
  • the port 12 is located in the furnace or in the combustion chamber.
  • a combustion nozzle 2 is disposed at the combustion port 12, and the combustion nozzle 2 is connected to the evaporation pipe 3, and the evaporation pipe 3 is connected to the high-temperature gas supply pipe 4, and the high-temperature gas supply pipe 4 passes the high-temperature gas into the evaporation pipe 3.
  • An atomizing nozzle 5 is disposed in the evaporation duct 3, and the atomizing nozzle 5 is connected to the fuel pipe 6, and the alcohol-based fuel is sent to the atomizing nozzle 5 through the fuel pipe 6, and the atomizing nozzle 5 atomizes the alcohol-based fuel.
  • a cyclone 7 is disposed between the air delivery duct 11 and the combustion port 12. After passing through the cyclone 7, the air forms a central recirculation zone to stabilize the flame.
  • the burner 2 is fixed to the central axis of the cyclone 7 and extends into the combustion port 12, which allows the position of the discharge point of the burner 2 to be optimized to enhance the combustion effect.
  • the evaporation duct 3 is located at the center of the air delivery duct 11, and the evaporating duct 3 is arranged coaxially with the air delivery duct 11. This causes the conveying direction of the mixed gas of the alcohol-based fuel gas and the high-temperature gas supplied from the evaporation pipe 3 to coincide with the conveying direction of the air delivered by the air conveying pipe 11, and improves the stability of combustion.
  • the atomizing nozzle 5 is located at the center of the evaporation pipe 3 facing away from the end of the burner 2.
  • the atomized alcohol-based fuel sprayed by the atomizing nozzle 5 can be fully vaporized and vaporized with the high temperature gas, and the vaporization is more thorough and reliable.
  • the high-temperature gas supply pipe 4 is connected to the high-temperature flue gas pipe, which can function to recover the heat energy of the flue gas, further improving the energy utilization efficiency.
  • the high temperature gas supply pipe 4 passes the high temperature gas into the evaporation pipe 3, and the high temperature gas may be the boiler exhaust gas, or the air exhausted by the boiler exhausted through the heat exchanger, the fuel pipe 6 will The alcohol-based fuel is sent to the atomizing nozzle 5, and the atomizing nozzle 5 injects the alcohol-based fuel into the evaporation pipe 3.
  • the atomized alcohol-based fuel is vaporized after the high-temperature gas, and the vaporized fuel mixed with the high-temperature gas is injected into the combustion port through the burner 2.
  • the medium is mixed with the air delivered by the air delivery pipe 11 to burn.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

一种醇基燃料汽化燃烧装置，包括机壳（1），机壳（1）内设有相互连接的空气输送管道（11）和燃烧口（12），燃烧口（12）处设有燃烧嘴（2），燃烧嘴（2）连接有蒸发管道（3），蒸发管道（3）连接有高温气体供应管道（4），蒸发管道（3）内设有雾化喷嘴（5），雾化喷嘴（5）连接有燃料管（6）。该燃烧装置避免了燃烧不完全产物的产生，减少污染物排放，同时提高了燃烧效率和燃料利用率，还可以提高火焰稳定性。

Description

一种醇基燃料汽化燃烧装置 技术领域
本发明属于燃烧装置领域，特别涉及一种醇基燃料汽化燃烧装置。
 背景技术
醇基燃料是以醇类(甲醇、乙醇等)为主要原料，按特定工艺配方，经化学勾兑合成的一种液体燃料，是一种清洁的燃料，可以被广泛应用于锅炉、窑炉、熔铝炉等行业。
 技术问题
目前燃烧醇基燃料的燃烧器普遍采用喷雾燃烧模式，但是由于醇类，特别是甲醇的汽化潜热比较大，例如甲醇的汽化潜热大约是柴油的4倍，这就会导致炉膛或燃烧室内会出现局部低温区域，造成燃烧不完全以及排放甲醛等污染物。为了解决这一问题，可以采用将燃料预先蒸发成气体的方式，目前通常采用的是电或烟气加热燃料容器的方式，例如专利CN201410223125.0，CN201620300450.7，CN201611102615.0，CN201520498520.X等。但是，这些方法存在系统复杂，燃料控制困难，调节不灵活等问题，并且有气体泄漏或者容器爆炸等安全隐患。
 技术解决方案
为克服现有技术的不足及存在的问题，本发明提供一种醇基燃料汽化燃烧装置，使用安全可靠，控制方便。
本发明是通过以下技术方案实现的：
一种醇基燃料汽化燃烧装置，包括机壳，所述机壳内设有相互连接的空气输送管道和燃烧口，燃烧口处设有燃烧嘴，燃烧嘴连接有蒸发管道，蒸发管道连接有高温气体供应管道，蒸发管道内设有雾化喷嘴，雾化喷嘴连接有燃料管。
所述蒸发管道位于空气输送管道的中心，蒸发管道与空气输送管道同轴布置。
所述雾化喷嘴位于蒸发管道上背向燃烧嘴一端的中心处。
所述空气输送管道和燃烧口之间设有旋流器。
所述燃烧嘴固定于旋流器的中心轴处，且延伸至燃烧口中。
所述高温气体供应管道连接于高温烟气管。
 有益效果
本发明设置有蒸发管道，高温气体供应管道将高温气体通入蒸发管道，雾化喷嘴将醇基燃料喷入蒸发管道，雾化的醇基燃料遇高温气体后汽化，汽化燃料混合高温气体通过燃烧嘴喷入燃烧口中与空气输送管道输送的空气混合燃烧，醇基燃料经过汽化后再燃烧，一方面消除了炉膛或者燃烧室内的局部低温区，避免了燃烧不完全产物的产生，减少污染物排放，同时提高了燃烧效率和燃料利用率；另一方面，醇基燃料汽化后与高温气体混合后燃烧可以降低炉膛或者燃烧室内的火焰最高温度，这可起到降低氮氧化物排放的作用。醇基燃料汽化后与高温气体混合后再燃烧还有利于缩短火焰，同时由于混合气的温度高于常温空气，还可以提高火焰稳定性。
 附图说明
图1是本发明的结构示意图。
图中：1-机壳，11-空气输送管道，12-燃烧口，2-燃烧嘴，3-蒸发管道，4-高温气体供应管道，5-雾化喷嘴，6-燃料管，7-旋流器。
 本发明的实施方式
为了便于本领域技术人员的理解，以下结合附图和具体实施例对本发明作进一步详细描述。
如图1，一种醇基燃料汽化燃烧装置，包括机壳1，机壳1内设有相互连接的空气输送管道11和燃烧口12，空气输送管道11将空气输送至燃烧口12处，燃烧口12位于炉膛或者燃烧室内。燃烧口12处设有燃烧嘴2，燃烧嘴2连接有蒸发管道3，蒸发管道3连接有高温气体供应管道4，高温气体供应管道4将高温气体通入蒸发管道3内。蒸发管道3内设有雾化喷嘴5，雾化喷嘴5连接有燃料管6，醇基燃料通过燃料管道6输送至雾化喷嘴5，雾化喷嘴5将醇基燃料雾化喷出。空气输送管道11和燃烧口12之间设有旋流器7，空气经过旋流器7后会形成中心回流区，起到稳定火焰的作用。燃烧嘴2固定于旋流器7的中心轴处，且延伸至燃烧口12中，这可使得燃烧嘴2的喷出点位置最优，提升燃烧效果。
蒸发管道3位于空气输送管道11的中心，蒸发管道3与空气输送管道11同轴布置。这使得蒸发管道3输送的醇基燃料气体和高温气体的混气体的输送方向与空气输送管道11输送的空气的输送方向一致，提升燃烧的稳定性。
雾化喷嘴5位于蒸发管道3上背向燃烧嘴2一端的中心处，雾化喷嘴5喷出的雾化的醇基燃料可充分与高温气体混合汽化，汽化更为彻底、可靠。
高温气体供应管道4连接于高温烟气管，这可起到回收烟气热能的作用，进一步提高了能源利用效率。
本实施例的工作过程：首先，高温气体供应管道4将高温气体通入蒸发管道3，高温气体即可以是锅炉排烟，或者用锅炉排烟经过换热器加热后的空气，燃料管6将醇基燃料输送至雾化喷嘴5，雾化喷嘴5将醇基燃料喷入蒸发管道3，雾化的醇基燃料遇高温气体后汽化，汽化燃料混合高温气体通过燃烧嘴2喷入燃烧口12中与空气输送管道11输送的空气混合燃烧。
上述实施例为本发明的较佳的实现方式，并非是对本发明的限定，在不脱离本发明的发明构思的前提下，任何显而易见的替换均在本发明的保护范围之内。

Claims (6)

  1. 一种醇基燃料汽化燃烧装置，包括机壳（1），其特征在于：所述机壳内设有相互连接的空气输送管道（11）和燃烧口（12），燃烧口处设有燃烧嘴（2），燃烧嘴连接有蒸发管道（3），蒸发管道连接有高温气体供应管道（4），蒸发管道内设有雾化喷嘴（5），雾化喷嘴连接有燃料管（6）。
  2. 根据权利要求1所述的醇基燃料汽化燃烧装置，其特征在于：所述蒸发管道（3）位于空气输送管道（11）的中心，蒸发管道与空气输送管道同轴布置。
  3. 根据权利要求2所述的醇基燃料汽化燃烧装置，其特征在于：所述雾化喷嘴（5）位于蒸发管道（3）上背向燃烧嘴（2）一端的中心处。
  4. 根据权利要求1-3中任一项所述的醇基燃料汽化燃烧装置，其特征在于：所述空气输送管道（11）和燃烧口（12）之间设有旋流器（7）。
  5. 根据权利要求4所述的醇基燃料汽化燃烧装置，其特征在于：所述燃烧嘴（5）固定于旋流器（7）的中心轴处，且延伸至燃烧口（12）中。
  6. 根据权利要求5所述的醇基燃料汽化燃烧装置，其特征在于：所述高温气体供应管道（4）连接于高温烟气管。
PCT/CN2018/094759 2017-07-20 2018-07-06 一种醇基燃料汽化燃烧装置 WO2019015486A1 (zh)

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CN107420890B (zh) * 2017-07-20 2021-06-18 清远市精旺环保设备有限公司 一种醇基燃料汽化燃烧装置
CN108620599A (zh) * 2018-05-29 2018-10-09 葫芦岛市金景达清洁燃料有限公司 一种利用醇基燃料生产锌粉的装置及方法

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CN2221150Y (zh) * 1995-05-05 1996-02-28 吴道洪 高效节能液体燃料雾化器
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