WO2018218529A1 - 自冷却引射式燃烧器 - Google Patents

自冷却引射式燃烧器 Download PDF

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Publication number
WO2018218529A1
WO2018218529A1 PCT/CN2017/086666 CN2017086666W WO2018218529A1 WO 2018218529 A1 WO2018218529 A1 WO 2018218529A1 CN 2017086666 W CN2017086666 W CN 2017086666W WO 2018218529 A1 WO2018218529 A1 WO 2018218529A1
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WO
WIPO (PCT)
Prior art keywords
cooling
jacket
combustion head
air
burner
Prior art date
Application number
PCT/CN2017/086666
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English (en)
French (fr)
Inventor
胡秀文
张诗明
刘稼瑾
Original Assignee
深圳智慧能源技术有限公司
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.)
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Application filed by 深圳智慧能源技术有限公司 filed Critical 深圳智慧能源技术有限公司
Priority to PCT/CN2017/086666 priority Critical patent/WO2018218529A1/zh
Publication of WO2018218529A1 publication Critical patent/WO2018218529A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner

Definitions

  • the present invention relates to an ejector burner, and more particularly to a self-cooling ejector burner.
  • the existing ejector burner is a burner that provides air without additional power.
  • the air required for the combustion of the ejector burner is derived from the air of the gas kinetic energy, and the injected air is directly mixed with the fuel gas. .
  • the burner head works in a high temperature environment for a long time, which causes the combustion head material to be resistant to high temperatures. Even the high temperature resistant material has a limited service life, and most of them have environmental problems and are costly.
  • the burner burns the head without the measures of temperature drop and radiation, which causes the combustion head to work and the radiation to the environment is large.
  • the present invention proposes a self-cooling ejector burner.
  • the present invention provides a self-cooling ejector burner comprising a mixing tube, a combustion head and a nozzle, the mixing tube having an intake end and an outlet end, the nozzle being disposed at the intake end for Injecting fuel into the mixing tube and drawing external air into the mixing tube by ejector, the combustion head being disposed at the outlet end for burning the mixture of fuel and air, the burner further comprising Navigating an air flow path through which the inhaled air flows, the air flow path extending from a periphery of the combustion head to an intake end of the mixing tube such that the inhaled air reaches the mixing tube The combustion head is cooled before the intake end.
  • a periphery of the burner is provided with a jacket extending from a periphery of the combustion head to an intake end of the mixing tube and to an outer wall of the burner Interposed to form the air flow passage, the outside of the combustion head is provided with a cooling structure, the cooling structure includes a cooling jacket, and a cooling flow passage is formed between the cooling jacket and the outer wall of the combustion head, The cooling jacket is provided with the cooling flow A communicating air inlet, the cooling flow passage being part of the air flow passage, the cooling jacket being a part of the jacket.
  • the jacket includes the integrally formed cooling jacket, the mixing tube jacket portion, and an arc portion extending from the mixing tube jacket portion, the curved portion The end is sealed to the outer wall of the nozzle
  • the arcuate portion is configured to form an air outlet of the air flow passage.
  • the burner further includes a burner base, the nozzle is fixed on the burner base, and a bottom portion of the curved portion extends downwardly to a connecting portion, and the connecting portion A fixed connection is made to the burner base to secure the cooling jacket.
  • the air flow passage includes the cooling flow passage, the mixing tube flow passage, and the absorption chamber formed in the curved portion, and the mixing tube flow passage is formed in the Between the outer wall of the mixing tube and the mixing tube jacket portion, the cooling flow passage communicates with the outside of the burner, and the absorption chamber communicates with the interior of the mixing tube.
  • the mixing tube includes a connected absorption tube and a diffuser tube
  • the mixing tube jacket portion includes a connected absorber tube jacket portion and a diffuser tube jacket portion
  • An absorbing tube is disposed in parallel with the absorbing tube jacket portion
  • the diffusing tube is disposed in parallel with the diffuser tube jacket portion
  • the curved portion is formed to extend from a lower edge of the absorbing tube jacket portion, the air An outlet is formed between the end of the curved portion and the lower edge of the absorber tube.
  • the combustion head includes an outer wall of the combustion head, a top end of the outer wall of the combustion head extends outwardly from a boss, and a top end of the cooling jacket is fixedly coupled to an outer edge of the boss
  • the cooling jacket is spaced from the outer wall of the combustion head to form the cooling flow passage, and the cooling jacket is circumferentially provided with a plurality of windows extending through the cooling jacket, the plurality of windows collectively forming the air Entrance.
  • the plurality of windows are evenly disposed along the circumferential direction of the cooling jacket, and a partition is disposed between the two adjacent windows, and the plurality of windows are disposed on the cooling jacket.
  • the upper part is disposed between the two adjacent windows, and the plurality of windows are disposed on the cooling jacket.
  • the cooling structure includes a plurality of heat dissipation ribs disposed between the cooling jacket and the outer wall of the combustion head, and each of the heat dissipation ribs is disposed corresponding to a window.
  • Each of the heat dissipation ribs is disposed along an axial direction of the burner, and the heat dissipation ribs are perpendicular to an outer wall of the combustion head and an inner wall of the cooling jacket, and each of the heat dissipation ribs is located at a corresponding one.
  • the window is in the middle of the circumferential direction, and each of the heat dissipation ribs is provided with a plurality of heat dissipation holes.
  • each of the windows tapers from top to bottom in the axial direction of the combustion head, such as an inverted trapezoid.
  • the present invention provides a self-cooling ejector burner in which an air ejector is disposed at the outer periphery of the combustion head.
  • a cooling structure is arranged outside the combustion head, the cooling structure includes a cooling jacket, a cooling flow passage is formed between the cooling jacket and the outer wall of the combustion head, and the cooling jacket is formed.
  • An air inlet is provided in communication with the cooling flow passage.
  • the working ⁇ fuel nozzle ejects high-speed fuel gas, which causes a certain degree of vacuum to the lower part of the nozzle and the air flow path.
  • the air is sucked from the outside of the combustion head into the mixing pipe of the burner along the cooling flow path and mixed with the fuel gas and then ejected to burn. .
  • the inner flow passage of the combustion head is a high temperature flame, and the outside of the combustion head is room temperature air.
  • the air vents flowing through the outer and outer walls of the combustion head heat the combustion head by convective heat transfer to remove a large amount of heat.
  • the present invention introduces air for combustion support into the combustion head for use as a post-cooling combustion, the advantages of the ejector burner are retained and the cooling of the combustion head is increased, which improves combustion stability and prolongs combustion.
  • the life of the head reduces the radiation from the combustion head to the environment.
  • FIG. 1 is an overall cross-sectional view of an embodiment of a self-cooling ejector burner of the present invention.
  • FIG. 2 is an enlarged schematic view showing the structure of the portion A of FIG. 1.
  • FIG. 3 is an enlarged schematic view showing the structure of the portion B of FIG. 1.
  • FIG. 4 is a perspective view showing the structure of a portion of the burner head of FIG. 1.
  • FIG. 5 is an overall cross-sectional view of another embodiment of a self-cooling ejector burner of the present invention.
  • FIG. 6 is a perspective view showing a structure of a portion of the burner head of FIG. 5.
  • the present invention provides a self-cooling ejector burner comprising a combustion head 10, a mixing tube 12, a nozzle 14 and a burner base 16.
  • the mixing tube 12 has an inlet end 18 and an outlet end 20, and the combustion head 10 is disposed at the outlet end 20 of the mixing tube 12 for combusting a mixture of fuel gas and air; the nozzle 14 is disposed at the inlet end 18 of the mixing tube 12, The fuel gas is injected into the mixing tube 12 and the outside air is sucked into the mixing tube 12 by the ejector action.
  • the nozzle 14 is fixedly mounted on the burner base 16, and the burner head 10 is connected to the mixing tube 12 by welding or integrally formed.
  • the mixing tube 12 includes an associated absorber tube 22 and a diffuser tube 24 that tapers from the inlet end 18 toward the outlet end 20, and the diffuser tube 24 tapers from the inlet end 18 toward the outlet end 20.
  • the nozzle 14 is disposed at the intake end 18 and the nozzle tip of the nozzle 14 extends to a position adjacent to the connection of the absorber tube 22 to the diffuser tube 24.
  • the burner further includes an air flow passage 28 that directs the flow of the inhaled air, the air flow passage 28 extending from the periphery of the combustion head 10 to the intake end of the mixing tube 12. 18, causing the inhaled air to cool the combustion head 10 before reaching the intake end 18 of the mixing tube 12.
  • a periphery of the burner is provided with a jacket 26 extending from the periphery of the combustion head 10 to the intake end 18 of the mixing tube 12 and spaced apart from the outer wall of the burner to form Air flow path 28.
  • the air flow passage 28 has an air inlet 30 and an air outlet 32, and the air inlet 30 communicates with the outside of the burner, and the air outlet 32 communicates with the inside of the mixing tube 12. Air outside the burner is drawn into the air flow passage 28 from the air inlet 30, then enters the mixing tube 12 through the air outlet 32, and is mixed with the fuel gas sprayed from the nozzle 14.
  • the outer portion of the combustion head 10 is provided with a cooling structure including a cooling jacket 34, and a cooling flow passage 44 is formed between the cooling jacket 34 and the outer wall of the combustion head 10.
  • the air inlet 30 is disposed on the cooling jacket 34 such that the air inlet 30 communicates with the cooling flow passage 44.
  • the cooling jacket 34 is part of the jacket 26, and correspondingly, the cooling runner 44 is part of the air runner 28.
  • the jacket 26 includes an integrally formed cooling jacket 34, a mixing tube jacket portion 36, and an arcuate portion 38 extending from the mixing tube jacket portion 36.
  • the end 40 of the curved portion 38 is sealed from the outer wall surface of the nozzle 14.
  • the connection, such as welding, the air inlet 30 of the air flow passage 28 is disposed on the cooling jacket 34, and the air outlet 32 is formed by the curved portion 38.
  • the curved portion 38 extends downwardly from its bottom end, for example extending vertically downwardly from a connecting portion 42 that is fixedly coupled to the burner base 16, such as a threaded connection,
  • the jacket 26 is fixed.
  • the connecting portion 42 and the burner base 16 may also be fixedly coupled in other manners.
  • the air flow path 28 includes cooling flow paths 44 that communicate with each other, a mixing tube flow path 46, and an absorption chamber 48 formed in the curved portion 38.
  • the cooling flow path 44 is formed between the outer wall of the combustion head 10 and the cooling jacket 34
  • the mixing pipe flow path 46 is formed between the outer wall of the mixing pipe 12 and the mixing pipe jacket portion 36.
  • the cooling flow path 44 communicates with the outside of the burner
  • the absorption chamber 48 communicates with the inside of the mixing pipe 12.
  • the mixing tube jacket portion 36 includes an associated absorber tube jacket portion 50 and a diffuser tube jacket portion 52, the arc portion 38 extending from the lower edge of the absorber tube jacket portion 50, the air flow passage 28 An air outlet 32 is formed between the end 40 of the curved portion 38 and the lower edge of the absorber tube 22.
  • the absorber tube 22 is disposed in parallel with the absorber tube jacket portion 50, and the diffuser tube 24 is disposed in parallel with the diffuser tube jacket portion 52.
  • the mixing tube flow path 46 is a flow path having a uniform diameter.
  • the mixing tube flow passage 46 may also be designed to be non-uniform according to actual design requirements. For example, the separation distance between the absorption tube 22 and the absorption tube jacket portion 50 is greater or smaller than the expansion tube 24 and expansion. The separation distance between the pressure tube jacket portions 52.
  • the cooling runners 44 are also channels of uniform diameter, and the cooling channels 44 are the same diameter as the mixing tube runners 46.
  • the cooling flow passages 4 may also be designed to be different in diameter from the mixing tube flow passages 46, depending on the actual design requirements of the combustor.
  • the diameter of the cooling flow passages 44 is larger or smaller than the mixing tube flow passages 46. diameter.
  • the air outlet 32 is formed by an arcuate portion 38, specifically, an air outlet 32 is formed between the end 40 of the curved portion 38 and the lower edge of the absorber tube 22. Therefore, the size of the air outlet 32 can be determined according to the actual operating conditions of the burner, such as the amount of air outflow, i.e., by changing the curvature of the curved portion 38 to change the size of the air outlet 32.
  • the combustion head 10 includes a combustion head outer wall 54.
  • the lower end of the jacket 26, i.e., the end 40 of the curved portion 38, is sealingly coupled to the outer wall of the nozzle 14, and the upper end of the jacket 26 is fixedly coupled to the top end of the outer wall 54 of the burner.
  • the top end of the outer wall 54 of the burner head extends outwardly from a boss 56, and the top end of the cooling jacket 34 is fixedly coupled to the outer edge of the boss 56, such as welding.
  • the cooling jacket 34 is spaced from the outer wall 54 of the combustion head to form a cooling runner 44 which is circumferentially provided with a plurality of windows 58 extending through the cooling jacket 34 which together form the air inlet 30 of the air flow passage 28.
  • a plurality of windows 58 are disposed in the upper portion of the cooling jacket 34.
  • Each window 58 has a rectangular shape, and a plurality of windows 58 are evenly spaced along the circumferential direction of the cooling jacket 34, and a partition 59 is provided between each adjacent two windows 58.
  • the cooling structure includes a plurality of heat dissipation ribs 60 disposed between the cooling jacket 34 and the outer wall 54 of the combustion head, and the heat dissipation ribs 60 are configured to exchange heat between the air of the suction window 58 and the heat dissipation ribs 60.
  • each fin rib 60 is located at a corresponding window 58 position.
  • each of the heat dissipation ribs 60 is disposed along the axial direction of the burner, and the heat dissipation ribs 60 are perpendicular to the inner walls of the combustion head outer wall 54 and the cooling jacket 34, and each of the heat dissipation ribs 60 is located at the corresponding window. 58 is in the middle of the week.
  • a plurality of heat dissipation holes 62 are provided in each of the heat dissipation ribs 60 to increase the surface area of the heat dissipation ribs.
  • a plurality of windows 58 are designed to have an inverted trapezoidal shape so that the window 58 is tapered from top to bottom, so that the upper portion of the window 58 can draw more air to the outer wall of the burner head having a higher temperature.
  • the upper part of 54 is cooled.
  • the inverted trapezoid shown here is only an example, and other tapered shapes may also be employed.
  • Other structures of the burner in this embodiment are the same as those of the above embodiment, and will not be described again.
  • the nozzle 14 injects the fuel gas to cause a certain degree of vacuum in the air flow passage 28 and the lower portion of the nozzle 14. Due to the negative pressure, the normal temperature air outside the combustion head 10 is sucked into the cooling flow passage 44 through the window 58, and the air passes through.
  • the heat radiating ribs 60 and the cooling flow passages 44 take away the heat transferred from the inner wall of the combustion head 10 by convection heat transfer to cool and cool the combustion head 10, thereby improving the working environment of the combustion head 10.
  • the self-cooling ejector burner of the present invention retains the advantages of an ejector burner and adds a cooling function to the combustion head 10.
  • the heat dissipation rib 60 is provided to enhance heat transfer, and the air participating in the combustion combustion first participates in cooling the combustion head 10 and then participates in combustion.
  • the enthalpy of the mixture in the mixing tube 12 is increased, which improves the combustion
  • the stability of the burning further prolongs the service life of the combustion head 10 and reduces the radiation of the combustion head 10 to the environment.
  • the cooling rib 60 is connected between the cooling jacket 34 and the outer wall 54 of the combustion head to form a structural support, which serves as a supporting and fixing function for the cooling jacket 34, so that the cooling structure is more stable.
  • the window 58 is designed as a rectangle and an inverted trapezoid, but the invention is not limited thereto, and in other embodiments, the window 58 may be designed according to actual needs. For other shapes, such as oval or round and other combinations of shapes.
  • the above-described arrangement of the heat dissipation ribs 60 is only one embodiment of the present invention.
  • the heat dissipation ribs 60 may be installed according to the specific design requirements of the burner.
  • Means, for example, the heat dissipation rib 60 is designed to have an angle with the cooling jacket 34 and the outer wall 54 of the combustion head.
  • a plurality of screw holes are provided in the absorber tube jacket portion 50 and the corresponding absorber tube 22, and then fixed by screws.
  • a plurality of screw holes are arranged at one end of the mixing tube 12 near the combustion head 10, and the same number of screw holes are provided on the mixing tube jacket portion 36 of the corresponding position, and are fixed by screws, thereby fixing the jacket 26 to the combustion.
  • the jacket 26 may be fixed to the burner by other fixing means, which is not limited by the present invention.
  • the present invention provides a self-cooling ejector burner in which an air ejector is disposed at the outer periphery of the combustion head.
  • a cooling structure is arranged outside the combustion head, the cooling structure includes a cooling jacket, a cooling flow passage is formed between the cooling jacket and the outer wall of the combustion head, and the cooling jacket is formed.
  • An air inlet is provided in communication with the cooling flow passage.
  • the working ⁇ fuel nozzle ejects high-speed fuel gas, which causes a certain degree of vacuum to the lower part of the nozzle and the air flow path.
  • the air is sucked from the outside of the combustion head into the mixing pipe of the burner along the cooling flow path and mixed with the fuel gas and then ejected to burn. .
  • the inner flow passage of the combustion head is a high temperature flame, and the outside of the combustion head is room temperature air.
  • the air vents flowing through the outer and outer walls of the combustion head heat the combustion head by convective heat transfer to remove a large amount of heat. Since the invention uses the air for the combustion air into the combustion head for cooling and then assists combustion, the advantages of the ejector burner are retained, and the cooling of the combustion head is increased, which not only improves the stability of combustion but also prolongs the combustion head.
  • the service life reduces the radiation from the combustion head to the environment.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)

Abstract

一种自冷却引射式燃烧器，包括混合管(12)、燃烧头(10)和喷嘴(14)，混合管(12)具有进气端(18)和出气端(20)，喷嘴(14)设置于进气端(18)，用以向混合管(12)内喷射燃料并利用引射作用将外部的空气吸入混合管(12)内，燃烧头(10)设置于出气端(20)，用以燃烧燃料和空气的混合物，燃烧器还包括引导被吸入的空气流动的空气流道(28)，空气流道(28)从燃烧头(10)的外围延伸至混合管(12)的进气端(18)，使得被吸入的空气在到达混合管(12)的进气端(18)之前，对燃烧头(10)进行冷却。该燃烧器将用于助燃的空气引入燃烧头(10)用作冷却后再助燃，保留了引射式燃烧器的优势又增加了燃烧头(10)的冷却，既提高了燃烧的稳定性又延长了燃烧头(10)的使用寿命，减小燃烧头部对环境的辐射。

Description

自冷却引射式燃烧器 技术领域
[0001] 本发明涉及一种引射式燃烧器， 特别涉及一种自冷却引射式燃烧器。
背景技术
[0002] 目前油气幵采过程中产生的废气较难回收， 现多排放至高空火炬或地面火炬燃 烧处理。 现有引射式燃烧器是一种无需额外动力提供空气的燃烧器， 引射式燃 烧器燃烧所需的空气来源于燃气动能弓 I射的空气， 引射进的空气直接就和燃料 气混合。 燃烧器头部长期工作在高温环境下， 这就会造成燃烧头部材料要求耐 高温， 即使耐高温的材料使用寿命也是有限的， 大多存在环保问题， 而且成本 很高。 而且该种燃烧器燃烧头部无降温降辐射措施， 造成燃烧头部工作吋对环 境辐射较大。
技术问题
[0003] 有鉴于此， 本发明提出一种自冷却引射式燃烧器。
问题的解决方案
技术解决方案
[0004] 本发明提供一种自冷却引射式燃烧器， 包括混合管、 燃烧头和喷嘴， 所述混合 管具有进气端和出气端， 所述喷嘴设置于所述进气端， 用以向所述混合管内喷 射燃料并利用引射作用将外部的空气吸入所述混合管内， 所述燃烧头设置于所 述出气端， 用以燃烧所述燃料和空气的混合物， 所述燃烧器还包括引导所述被 吸入的空气流动的空气流道， 所述空气流道从所述燃烧头的外围延伸至所述混 合管的进气端， 使得所述被吸入的空气在到达所述混合管的进气端之前， 对所 述燃烧头进行冷却。
[0005] 在一实施例中， 所述燃烧器的外围设有夹套， 所述夹套从所述燃烧头的外围延 伸至所述混合管的进气端并与所述燃烧器的外壁之间间隔以形成所述空气流道 ， 所述燃烧头的外部设有冷却结构， 所述冷却结构包括冷却夹套， 所述冷却夹 套与所述燃烧头的外壁之间形成冷却流道， 所述冷却夹套上设有与所述冷却流 道连通的空气入口， 所述冷却流道为所述空气流道的一部分， 所述冷却夹套为 所述夹套的一部分。
[0006] 在一实施例中， 所述夹套包括一体成型的所述冷却夹套、 混合管夹套部及自所 述混合管夹套部延伸出的弧形部， 所述弧形部的末端与所述喷嘴外壁密封连接
， 所述弧形部构造形成所述空气流道的空气出口。
[0007] 在一实施例中， 所述燃烧器还包括燃烧器底座， 所述喷嘴固定在所述燃烧器底 座上， 所述弧形部底端向下延伸出一连接部， 所述连接部与所述燃烧器底座固 定连接以对所述冷却夹套进行固定。
[0008] 在一实施例中， 所述空气流道包括相互连通的所述冷却流道、 混合管流道及形 成于所述弧形部内的吸收室， 所述混合管流道形成于所述混合管的外壁与所述 混合管夹套部之间， 所述冷却流道与所述燃烧器外部连通， 所述吸收室与所述 混合管内部连通。
[0009] 在一实施例中， 所述混合管包括相连接的吸收管和扩压管， 所述混合管夹套部 包括相连接的吸收管夹套部和扩压管夹套部， 所述吸收管与所述吸收管夹套部 平行设置， 所述扩压管与所述扩压管夹套部平行设置， 所述弧形部自所述吸收 管夹套部下缘延伸形成， 所述空气出口形成于所述弧形部的末端与所述吸收管 的下缘之间。
[0010] 在一实施例中， 所述燃烧头包括燃烧头外壁， 所述燃烧头外壁的顶端向外侧延 伸出一凸台， 所述冷却夹套的顶端固定连接至所述凸台的外缘， 所述冷却夹套 与所述燃烧头外壁之间间隔以形成所述冷却流道， 所述冷却夹套沿周向设有若 干贯穿所述冷却夹套的窗口， 所述若干窗口共同形成所述空气入口。
[0011] 在一实施例中， 所述若干窗口沿所述冷却夹套周向均匀设置， 相邻的两个所述 窗口之间设有一隔断部， 所述若干窗口设置于所述冷却夹套的上部。
[0012] 在一实施例中， 所述冷却结构包括设置于所述冷却夹套与所述燃烧头外壁之间 的若干散热筋板， 每一所述散热筋板与一所述窗口对应设置， 每一所述散热筋 板沿所述燃烧器的轴向布置， 且所述散热筋板同吋与所述燃烧头外壁和冷却夹 套的内壁垂直， 每一所述散热筋板位于对应的所述窗口在周向上的中间位置， 每一所述散热筋板上设有若干散热孔。 [0013] 在一实施例中， 每个所述窗口在所述燃烧头的轴向上自上而下渐缩， 例如为倒 梯形。
发明的有益效果
有益效果
[0014] 综上所述， 本发明提出一种自冷却引射式燃烧器， 将空气引射口设置在燃烧头 外周部。 通过给整个燃烧器加一个夹套形成一路一端封闭的空气流道， 燃烧头 外部设有冷却结构， 冷却结构包括冷却夹套， 冷却夹套与燃烧头外壁之间形成 冷却流道， 冷却夹套上设有与冷却流道连通的空气入口。 工作吋燃料喷嘴喷出 高速燃料气， 对喷嘴下部和空气流道造成一定真空度， 空气从燃烧头外部被吸 入顺着冷却流道进入燃烧器的混合管并与燃料气混合再喷出去燃烧。 燃烧头内 部流道是高温火焰， 燃烧头外部是常温空气。 空气流过燃烧头外壁和外壁上的 散热筋板通过对流换热带走大量热量对燃烧头进行冷却。
[0015] 由于本发明将用于助燃的空气引入燃烧头用作冷却后再助燃， 保留了引射式燃 烧器的优势又增加了燃烧头的冷却， 既提高了燃烧的稳定性又延长了燃烧头的 使用寿命， 减小燃烧头部对环境的辐射。
对附图的简要说明
附图说明
[0016] 图 1为本发明自冷却引射式燃烧器一实施例的整体剖视图。
[0017] 图 2为图 1中圈 A部分结构的放大示意图。
[0018] 图 3为图 1中圈 B部分结构的放大示意图。
[0019] 图 4为图 1中燃烧头部分结构的立体示意图。
[0020] 图 5为本发明自冷却引射式燃烧器另一实施例的整体剖视图。
[0021] 图 6为图 5中燃烧头部分结构的立体示意图。
本发明的实施方式
[0022] 在详细描述实施例之前， 应该理解的是， 本发明不限于本申请中下文或附图中 所描述的详细结构或元件排布。 本发明可为其它方式实现的实施例。 而且， 应 当理解， 本文所使用的措辞及术语仅仅用作描述用途， 不应作限定性解释。 本 文所使用的"包括"、 "包含"、 "具有"等类似措辞意为包含其后所列出之事项、 其 等同物及其它附加事项。 特别是， 当描述 "一个某元件 "吋， 本发明并不限定该元 件的数量为一个， 也可以包括多个。
[0023] 如图 1所示， 本发明提出一种自冷却引射式燃烧器， 包括燃烧头 10、 混合管 12 、 喷嘴 14和燃烧器底座 16。 混合管 12具有进气端 18和出气端 20， 燃烧头 10设置 于混合管 12的出气端 20， 用以燃烧燃料气与空气的混合物； 喷嘴 14设置于混合 管 12的进气端 18， 用以向混合管 12内喷射燃料气并利用引射作用将外部的空气 吸入混合管 12内。 喷嘴 14固定安装在燃烧器底座 16上， 燃烧头 10与混合管 12通 过焊接连接或者一体成型在一起。
[0024] 混合管 12包括相连接的吸收管 22和扩压管 24， 吸收管 22自进气端 18朝向出气端 20渐缩， 扩压管 24自进气端 18朝向出气端 20渐扩。 在所示的实施例中， 喷嘴 14 设置在进气端 18， 且喷嘴 14的喷嘴头延伸至吸收管 22与扩压管 24连接的位置附 近。
[0025] 请同吋参考图 2和图 3， 所述燃烧器还包括引导被吸入的空气流动的空气流道 28 ， 空气流道 28从燃烧头 10的外围延伸至混合管 12的进气端 18， 使得所述被吸入 的空气在到达混合管 12的进气端 18之前对燃烧头 10进行冷却。 具体而言， 所述 燃烧器的外围设有夹套 26， 夹套 26从燃烧头 10的外围延伸至混合管 12的进气端 1 8， 并与所述燃烧器的外壁之间间隔以形成空气流道 28。 空气流道 28具有空气入 口 30和空气出口 32， 空气入口 30与所述燃烧器的外部连通， 空气出口 32与混合 管 12内部连通。 所述燃烧器外部的空气从空气入口 30被吸入空气流道 28， 然后 经空气出口 32进入混合管 12， 并与喷嘴 14喷出的燃料气混合。
[0026] 燃烧头 10的外部设有冷却结构， 所述冷却结构包括冷却夹套 34， 冷却夹套 34与 燃烧头 10的外壁之间形成冷却流道 44。 空气入口 30设置在冷却夹套 34上， 使得 空气入口 30与冷却流道 44连通。 其中， 冷却夹套 34为夹套 26的一部分， 对应地 ， 冷却流道 44为空气流道 28的一部分。
[0027] 在所示的实施例中， 夹套 26包括一体成型的冷却夹套 34、 混合管夹套部 36及自 混合管夹套部 36延伸出的弧形部 38。 弧形部 38的末端 40与喷嘴 14的外壁面密封 连接， 例如焊接， 空气流道 28的空气入口 30设置在冷却夹套 34上， 空气出口 32 由弧形部 38构造形成。
[0028] 在所示的实施例中， 弧形部 38自其底端向下延伸， 例如垂直向下延伸出一连接 部 42， 连接部 42与燃烧器底座 16固定连接， 例如螺纹固定连接， 以对夹套 26进 行固定。 应当理解的是， 在其他实施例中， 连接部 42与燃烧器底座 16也可以其 他方式固定连接。
[0029] 空气流道 28包括相互连通的冷却流道 44、 混合管流道 46及形成于弧形部 38内的 吸收室 48。 其中， 冷却流道 44形成于燃烧头 10的外壁与冷却夹套 34之间， 混合 管流道 46形成于混合管 12的外壁与混合管夹套部 36之间。 冷却流道 44与所述燃 烧器的外部连通， 吸收室 48与混合管 12的内部连通。
[0030] 混合管夹套部 36包括相连接的吸收管夹套部 50和扩压管夹套部 52， 弧形部 38自 吸收管夹套部 50的下缘延伸形成， 空气流道 28的空气出口 32形成于弧形部 38的 末端 40与吸收管 22的下缘之间。
[0031] 在所示的实施例中， 吸收管 22与吸收管夹套部 50平行设置， 扩压管 24与扩压管 夹套部 52平行设置。 换句话说， 混合管流道 46为直径均匀的流道。 在其他实施 例中， 根据实际设计需求， 混合管流道 46也可以设计为不均匀的， 例如， 吸收 管 22与吸收管夹套部 50之间的间隔距离大于或小于扩压管 24与扩压管夹套部 52 之间的间隔距离。
[0032] 在所示的实施例中， 冷却流道 44也为直径均匀的流道， 且冷却流道 44与混合管 流道 46的直径相同。 在其他实施例中， 根据燃烧器的实际设计需求， 冷却流道 4 4也可以设计为与混合管流道 46的直径不同， 例如， 冷却流道 44的直径大于或小 于混合管流道 46的直径。
[0033] 空气出口 32由弧形部 38构造形成， 具体来说， 空气出口 32形成于弧形部 38的末 端 40与吸收管 22的下缘之间。 因此， 空气出口 32的大小可以根据燃烧器的实际 运行工况， 例如空气出气量大小来决定， 即通过改变弧形部 38弯曲的弧度来实 现改变空气出口 32的大小。
[0034] 燃烧头 10包括燃烧头外壁 54。 夹套 26的下端， 即弧形部 38的末端 40与喷嘴 14外 壁密封连接， 夹套 26的上端固定连接至燃烧头外壁 54的顶端。 [0035] 具体而言， 如图 4所示， 燃烧头外壁 54的顶端向外侧延伸出一凸台 56， 冷却夹 套 34的顶端固定连接至凸台 56的外缘， 例如焊接。 冷却夹套 34与燃烧头外壁 54 之间间隔以形成冷却流道 44， 冷却夹套 34沿周向设有若干贯穿冷却夹套 34的窗 口 58， 若干窗口 58共同形成空气流道 28的空气入口 30。
[0036] 在所示的实施例中， 若干窗口 58设置于冷却夹套 34的上部。 每一窗口 58呈长方 形， 若干窗口 58沿冷却夹套 34周向均匀地间隔设置， 每相邻的两个窗口 58之间 设有一隔断部 59。 所述冷却结构包括设置于冷却夹套 34与燃烧头外壁 54之间的 若干散热筋板 60， 散热筋板 60用以使得吸入窗口 58的空气与散热筋板 60之间进 行换热， 从而实现对燃烧头 10的冷却， 每一散热筋板 60位于一对应窗口 58位置 。 在此实施例中， 每一散热筋板 60沿燃烧器的轴向布置， 且散热筋板 60同吋与 燃烧头外壁 54和冷却夹套 34的内壁垂直， 每一散热筋板 60位于对应窗口 58在周 向上的中间位置。
[0037] 本实施例中， 在每一散热筋板 60上设有若干散热孔 62， 增加散热筋板的表面积
， 从而促进散热。
[0038] 如图 5和图 6所示， 在图 5和图 6所示的实施例中， 考虑到燃烧器在燃烧吋， 燃烧 头 10上部的温度高于下部的温度， 因此， 燃烧头 10上部的降温需求比燃烧头 10 下部要强。 为了实现该需求， 本实施例中将若干窗口 58设计为呈倒梯形， 使得 窗口 58自上而下渐缩， 这样就使得窗口 58上部能吸入更多空气， 以对温度较高 的燃烧头外壁 54上部进行冷却。 在此所示的倒梯形只是一种举例， 还可以采用 其它渐缩的形状。 本实施例中燃烧器的其他结构均与上述实施例相同， 在此不 再赘述。
[0039] 工作吋， 喷嘴 14喷射燃料气造成空气流道 28及喷嘴 14下部形成一定的真空度， 由于负压， 燃烧头 10外部的常温空气经窗口 58被吸入冷却流道 44内， 空气经过 散热筋板 60和冷却流道 44， 通过对流换热带走燃烧头 10内壁传过来的热量， 以 对燃烧头 10进行冷却降温， 改善燃烧头 10的工作环境。
[0040] 本发明的自冷却引射式燃烧器保留了引射式燃烧器的优势， 且又增加了针对燃 烧头 10的冷却功能。 设置散热筋板 60强化传热， 参与助燃的空气先参与了对燃 烧头 10的冷却， 再参与燃烧。 使得混合管 12内的混合气焓值提高， 既提高了燃 烧的稳定性， 又延长了燃烧头 10的使用寿命， 减小燃烧头 10对环境的辐射。 而 且， 散热筋板 60连接在冷却夹套 34与燃烧头外壁 54之间可以形成结构支撑， 对 冷却夹套 34起到支撑固定的作用， 使得冷却结构更加稳固。
[0041] 应当理解的是， 在所示的实施例中， 窗口 58设计为长方形和倒梯形， 但本发明 当不以此为限， 在其他实施例中， 根据实际需求也可以将窗口 58设计为其他形 状， 例如椭圆形或圆形及其他形状的组合。
[0042] 也应当理解的是， 上述散热筋板 60的设置方式仅为本发明的一种实施方式， 在 其他实施例中， 根据燃烧器的具体设计需求， 散热筋板 60也可以以其他安装方 式设置， 例如将散热筋板 60设计为与冷却夹套 34和燃烧头外壁 54具有一定角度
[0043] 针对夹套 26的固定， 在所示的实施例中， 采用在吸收管夹套部 50和对应的吸收 管 22上设置若干螺孔， 再利用螺丝固定。 同样地， 在混合管 12靠近燃烧头 10的 一端设置若干螺孔， 同吋在对应位置的混合管夹套部 36上设置同样数量的螺孔 ， 利用螺丝固定， 从而将夹套 26固定至燃烧器上。 当然， 在其他实施例中， 也 可以采用其他固定方式将夹套 26固定在燃烧器上， 本发明不对此限定。
[0044] 综上所述， 本发明提出一种自冷却引射式燃烧器， 将空气引射口设置在燃烧头 外周部。 通过给整个燃烧器加一个夹套形成一路一端封闭的空气流道， 燃烧头 外部设有冷却结构， 冷却结构包括冷却夹套， 冷却夹套与燃烧头外壁之间形成 冷却流道， 冷却夹套上设有与冷却流道连通的空气入口。 工作吋燃料喷嘴喷出 高速燃料气， 对喷嘴下部和空气流道造成一定真空度， 空气从燃烧头外部被吸 入顺着冷却流道进入燃烧器的混合管并与燃料气混合再喷出去燃烧。 燃烧头内 部流道是高温火焰， 燃烧头外部是常温空气。 空气流过燃烧头外壁和外壁上的 散热筋板通过对流换热带走大量热量对燃烧头进行冷却。 由于本发明将用于助 燃的空气弓 I入燃烧头用作冷却后再助燃， 保留了引射式燃烧器的优势又增加了 燃烧头的冷却， 既提高了燃烧的稳定性又延长了燃烧头的使用寿命， 减小燃烧 头部对环境的辐射。
[0045] 本文所描述的概念在不偏离其精神和特性的情况下可以实施成其它形式。 所公 幵的具体实施例应被视为例示性而不是限制性的。 因此， 本发明的范围是由所 附的权利要求， 而不是根据之前的这些描述进行确定。 在权利要求的字面意义 及等同范围内的任何改变都应属于这些权利要求的范围。

Claims

权利要求书
一种自冷却引射式燃烧器， 包括混合管、 燃烧头和喷嘴， 所述混合管 具有进气端和出气端， 所述喷嘴设置于所述进气端， 用以向所述混合 管内喷射燃料并利用引射作用将外部的空气吸入所述混合管内， 所述 燃烧头设置于所述出气端， 用以燃烧所述燃料和空气的混合物， 其特 征在于， 所述燃烧器还包括弓 I导所述被吸入的空气流动的空气流道， 所述空气流道从所述燃烧头的外围延伸至所述混合管的进气端， 使得 所述被吸入的空气在到达所述混合管的进气端之前， 对所述燃烧头进 行冷却。
如权利要求 1所述的自冷却引射式燃烧器， 其特征在于， 所述燃烧器 的外围设有夹套， 所述夹套从所述燃烧头的外围延伸至所述混合管的 进气端并与所述燃烧器的外壁之间间隔以形成所述空气流道， 所述燃 烧头的外部设有冷却结构， 所述冷却结构包括冷却夹套， 所述冷却夹 套与所述燃烧头的外壁之间形成冷却流道， 所述冷却夹套上设有与所 述冷却流道连通的空气入口， 所述冷却流道为所述空气流道的一部分 ， 所述冷却夹套为所述夹套的一部分。
如权利要求 1所述的自冷却引射式燃烧器， 其特征在于， 所述夹套包 括一体成型的所述冷却夹套、 混合管夹套部及自所述混合管夹套部延 伸出的弧形部， 所述弧形部的末端与所述喷嘴外壁密封连接， 所述弧 形部构造形成所述空气流道的空气出口。
如权利要求 3所述的自冷却引射式燃烧器， 其特征在于， 所述燃烧器 还包括燃烧器底座， 所述喷嘴固定在所述燃烧器底座上， 所述弧形部 底端向下延伸出一连接部， 所述连接部与所述燃烧器底座固定连接以 对所述冷却夹套进行固定。
如权利要求 3所述的自冷却引射式燃烧器， 其特征在于， 所述空气流 道包括相互连通的所述冷却流道、 混合管流道及形成于所述弧形部内 的吸收室， 所述混合管流道形成于所述混合管的外壁与所述混合管夹 套部之间， 所述冷却流道与所述燃烧器外部连通， 所述吸收室与所述 混合管内部连通。
如权利要求 3所述的自冷却引射式燃烧器， 其特征在于， 所述混合管 包括相连接的吸收管和扩压管， 所述混合管夹套部包括相连接的吸收 管夹套部和扩压管夹套部， 所述吸收管与所述吸收管夹套部平行设置 ， 所述扩压管与所述扩压管夹套部平行设置， 所述弧形部自所述吸收 管夹套部下缘延伸形成， 所述空气出口形成于所述弧形部的末端与所 述吸收管的下缘之间。
如权利要求 2所述的自冷却引射式燃烧器， 其特征在于， 所述燃烧头 包括燃烧头外壁， 所述燃烧头外壁的顶端向外侧延伸出一凸台， 所述 冷却夹套的顶端固定连接至所述凸台的外缘， 所述冷却夹套与所述燃 烧头外壁之间间隔以形成所述冷却流道， 所述冷却夹套沿周向设有若 干贯穿所述冷却夹套的窗口， 所述若干窗口共同形成所述空气入口。 如权利要求 7所述的自冷却引射式燃烧器， 其特征在于， 所述若干窗 口沿所述冷却夹套周向均匀设置， 相邻的两个所述窗口之间设有一隔 断部， 所述若干窗口设置于所述冷却夹套的上部。
如权利要求 8所述的自冷却引射式燃烧器， 其特征在于， 所述冷却结 构包括设置于所述冷却夹套与所述燃烧头外壁之间的若干散热筋板， 每一所述散热筋板位于一对应窗口位置。
如权利要求 9所述的自冷却引射式燃烧器， 其特征在于， 每个所述窗 口在所述燃烧头的轴向上自上而下渐缩。
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5611684A (en) * 1995-04-10 1997-03-18 Eclipse, Inc. Fuel-air mixing unit
CN102865576A (zh) * 2012-09-26 2013-01-09 江苏中圣高科技产业有限公司 一种高效节能长明灯
CN107062225A (zh) * 2017-05-31 2017-08-18 深圳智慧能源技术有限公司 自冷却引射式燃烧器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5611684A (en) * 1995-04-10 1997-03-18 Eclipse, Inc. Fuel-air mixing unit
CN102865576A (zh) * 2012-09-26 2013-01-09 江苏中圣高科技产业有限公司 一种高效节能长明灯
CN107062225A (zh) * 2017-05-31 2017-08-18 深圳智慧能源技术有限公司 自冷却引射式燃烧器

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