WO2018192442A1 - 一种封闭燃烧炉头夹层式换热结构 - Google Patents

一种封闭燃烧炉头夹层式换热结构 Download PDF

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WO2018192442A1
WO2018192442A1 PCT/CN2018/083198 CN2018083198W WO2018192442A1 WO 2018192442 A1 WO2018192442 A1 WO 2018192442A1 CN 2018083198 W CN2018083198 W CN 2018083198W WO 2018192442 A1 WO2018192442 A1 WO 2018192442A1
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layer
gas
flue gas
air
layers
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PCT/CN2018/083198
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French (fr)
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刘元雨
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深圳市元疆科技有限公司
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    • 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
    • F23D14/12—Radiant burners
    • F23D14/126—Radiant burners cooperating with refractory wall surfaces
    • 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
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/66—Preheating the combustion air or gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications
    • F23D2212/005—Radiant gas burners made of specific materials, e.g. rare earths
    • 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 invention relates to the technical field of a stove, in particular to a closed combustion head sandwich heat exchange structure
  • the gas stoves are all burned by open flame. Whether it is infrared or atmospheric combustion, the flame should contact the bottom of the pot, mainly by conduction heating. The high temperature flue gas is directly distributed to the surrounding, and the thermal efficiency is low (generally less than 60%). .
  • Patent No. 101285596 the Chinese patent "a fully enclosed gas stove” has a fully enclosed structure, but uses atmospheric combustion, low thermal efficiency, and no residual heat of flue gas; publication number CN104864421A Although it is explicitly proposed to adopt the infrared heating method to realize the technical solution of separating the flue gas from the pot through the transparent SiO2 glass plate, the waste heat of the flue gas is not fully utilized, and the thermal efficiency is lower due to the glass barrier.
  • a plurality of smoke layers are alternately overlapped with the intake layer, and a vertical pipe is connected between the smoke layers, and a vertical pipe is also connected between the intake layers, and the smoke after combustion is along the smoke.
  • the gas passages are concentrated to the flue gas layer, and the vertical tubes connected through the layers are finally collected and discharged to the exhaust pipe, and the air is forcedly sent from the air inlet to the intake layer and moved upward through the vertical tubes between the intake layers.
  • the flue gas layer and the flue gas passage are both made of a material with high thermal conductivity and resistance to flue gas corrosion, such as aluminum which has been specially treated on the surface.
  • the air inlet layer is an air flowing through the channel, and is alternately overlapped with the smoke layer, and the layers are connected by a vertical pipe and finally communicate with the premixing cavity.
  • the air inlet layer and the flue gas layer pass heat transfer through the partition plate, and the communicating vertical pipe between the flue gas layers passes through the air intake layer and also transfers heat through the wall surface of the vertical pipe, and the communicating vertical pipe between the air inlet layers also passes through the smoke gas layer. The heat is transferred through the wall of the standpipe.
  • the gas pipeline is arranged in the flue gas layer, and the flue gas waste heat is used for preheating.
  • the gas pipeline must have the ability to resist high temperature flue gas corrosion, and can be made of brass or iron chrome aluminum.
  • the gas nozzle passes through the partition and enters the immediate vicinity. The air intake layer under the premixing chamber, the gas is ejected from the nozzle, and the ejector air is introduced into the premixing chamber together.
  • the top layer of the air intake layer is a gas/air premixing chamber, and the flue gas is first discharged through the outer wall of the premixing chamber, and the heat is transmitted to the internal preheating gas/air mixture through the wall of the premixing chamber, and the premixing must be controlled at this time.
  • the thickness of the cavity wall surface is such that the inner wall temperature is lower than the premixed gas ignition temperature when the wall surface reaches thermal equilibrium.
  • the closed infrared cooker directly discharged from the flue gas is more energy-efficient and has higher heat utilization rate.
  • the flue gas/air heat exchange area is large and the structure volume is small, and the flue gas exhaust resistance is small.
  • FIG. 1 is a cross-sectional view showing the basic structure of an embodiment of the present invention.
  • Figure 2 is a cross-sectional view showing the basic structure of the second embodiment of the present invention.
  • Embodiment 1 The closed combustion burner head in Fig. 1 comprises a closed cavity by a work surface (2) and an outer cavity (3) of the burner, and an infrared combustion burner is formed by a premixing chamber (4) and a combustion plate (1).
  • the air enters through the air inlet (9), passes through the plurality of intake layers and enters the premixing chamber (4).
  • the gas passes through the gas pipe (10) placed in the flue gas layer and reaches the gas nozzle (13), and the jet enters.
  • the premixing chamber (4) after the gas/air mixture is mixed, enters the closed chamber through the combustion plate to burn, emits infrared radiation and generates high-temperature flue gas, and the flue gas converges in the exhaust direction to the flue gas layer (5), and through Each smoke layer is discharged from the exhaust port (12).
  • the high-temperature flue gas first passes through the gap between the central through hole of the premixing chamber (4) and the inner and outer wall surfaces to reach the flue gas layer (5), and the flue gas layers communicate with each other through the vertical pipe (8), and finally converge to the exhaust port (12) ), due to the high temperature of the flue gas, all the places where the flue gas passes must have good high temperature characteristics and corrosion resistance or corrosion resistance treatment.
  • the gas inlet pipe is arranged in the flue gas layer, and the flue gas waste heat is used for preheating.
  • the gas nozzle passes through the baffle and enters the air intake layer immediately adjacent to the premixing chamber.
  • the gas is ejected from the nozzle, and the ejector air enters the premixing chamber together. .
  • each flue gas layer Do not allow the airflow to pass through the connecting standpipe (8).
  • Embodiment 2 The structure in FIG. 2 is basically the same as that in the first embodiment.
  • the closed combustion burner head is composed of a work surface (2) and a furnace outer chamber (3) to form a closed cavity, and the interior is composed of a premixing chamber (4) and a combustion plate ( 1) Forming an infrared burning burner, the air enters through the air inlet (9), passes through the plurality of inlet layers and enters the premixing chamber (4), and the gas arrives through the gas pipe (10) placed in the smoke layer
  • the gas nozzle (13) is injected into the premixing chamber (4).
  • the layer (5) is discharged from the exhaust port (12) after passing through each of the flue gas layers.

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

Abstract

一种封闭燃烧炉头夹层式换热结构，包括：封闭式燃烧腔体(3)、进气层(6)、烟气层(5)，进气层(6)与烟气层(5)交错重叠，各进气层(6)间有竖管(7)连通，各烟气层(5)间也有竖管(8)连通，燃烧后的烟气沿排气通道汇聚至烟气层(5)、通过竖管(8)透过各烟气层(5)最终汇总至排气管，燃气管布局在烟气层(5)中，燃气喷头透过隔板进入预混腔(4)下面的空气进气层(6)，同时空气从进气口(9)强制送入进气层(6)、并透过空气层间的竖管(7)逐层移动并最终与燃气管(13)喷出燃气一起进入预混腔(4)，高温烟气和低温空气/燃气经过这些夹层时气流通过壁面进行换热，从而实现高温烟气与室温空气/燃气的热交换。

Description

一种封闭燃烧炉头夹层式换热结构 技术领域
本发明涉及一种炉具技术领域，具体是一种封闭燃烧炉头夹层式换热结构
背景技术
目前燃气灶都是采用明火燃烧加热，不管是红外线式还是大气燃烧式，其火焰都要接触锅底，以传导加热为主，高温烟气直接向四周散发，热效率低(一般低于60％)。专利号101285596的中国专利“一种全封闭燃气炉具”公开文本虽然采用全封闭式结构，但采用的是大气式燃烧，热效率低，且烟气余热都未利用；公布号为CN104864421A的公开文本虽然明确的提出了采用红外线加热方式，实现将烟气与锅具通过透明SiO2玻璃板隔离进行炊事的技术方案，但是烟气余热未也充分利用，因玻璃阻隔，热效率更低。专利号204678422的专利“燃气灶余热利用装置”公开了烟气余热利用装置，利用储水盘管回收烟气余热，对直接燃烧效率提升无关，且不适合家用，专利申请号为2016102172158的专利提出了烟气余热再利用方法，但主要是接触式热交换，利用烟气余热加热进气，但其采用的是蜂窝体储热、换热结构，气流阻力大，进气与排气的热交换面积较小，热惰性大。
发明内容
本发明的目的是提供一种将烟气排气层与空气/燃气进气层交错重叠形成多个夹层进行换热的结构，适用于封闭式红外线燃烧炉头或类似应用场合。
为实现上述目的，根据本发明的一个方面，通过多个烟气层与进气层交错重叠，烟气层间有竖管连通，进气层间也有竖管连通，燃烧后的烟气沿烟气通道汇聚至烟气层、通过层间连通的竖管最终汇总至排气管排出，同时空气从进气口强制送入进气层、并透过进气层间的竖管逐层上移并最终与燃气一起进入预混腔，烟气层与空气交错重叠，因烟气与空气/燃气进气温差较大，气流经过时通过壁面换热，实现高温 烟气与室温空气/燃气的热交换。
所述烟气层及烟气通道均由高导热、耐烟气腐蚀材料制成，如表面做过特殊处理的铝。
所述进气层为空气流经通道，与烟气层交错重叠，层间用竖管连通，并最终连通预混腔。
进气层与烟气层间通过隔板传热，烟气层间的连通竖管因穿过进气层也通过竖管壁面传热，进气层间连通竖管也因穿过烟气层而通过竖管壁面传热。
燃气管道布置在烟气层，利用烟气余热进行预热，燃气管道必须具有抗高温烟气腐蚀的能力，可采用黄铜或铁铬铝等材料制成，燃气喷头透过隔板后进入紧邻预混腔下的空气进气层，燃气从喷头喷出，引射空气一起进入预混腔。
所述进气层顶层是燃气/空气预混腔，烟气排出时首先经过预混腔外壁面，热量通过预混腔壁面传至内部预热燃气/空气混合气，此时务必控制好预混腔壁面厚度，使壁面达到热平衡时内壁温度低于预混气点火温度。
本发明与现有技术相比的有益效果是：
1.比烟气直接排出的封闭式红外线炉具更节能、热利用率更高。
2.烟气/空气换热面积大而结构体积小，烟气排气阻力小。
附图说明
图1为本发明实施例一基本结构的剖视图
图2为本发明实施例二基本结构的剖视图
具体实施方式
实施例一：图1中封闭燃烧炉头由工作台面(2)、炉头外腔(3)构成封闭腔体，内部由预混腔(4)和燃烧板(1)形成红外线燃烧炉头，空气通过空气进气口(9)进入，透过多个进气层后进入预混腔(4)，燃气通过置于烟气层中的燃气管(10)抵达燃气喷头(13)，喷射进入预混腔(4)，燃气/空气混合后透过燃烧板进入密闭腔体燃烧，发出红外辐射并产生高温烟气，这些烟气沿排气方向汇聚至烟气层(5)， 并透过各烟气层后从排气口(12)排出。
高温烟气首先经过预混腔(4)中心通孔和内外壁面间的空隙抵达烟气层(5)，各烟气层间通过竖管(8)互通，并最终汇聚至排气口(12)，由于烟气的温度较高，所有烟气经过的地方都必须具有良好的高温特性和耐腐蚀性或者做耐腐蚀性处理。
燃气进气管布置在烟气层，利用烟气余热进行预热，燃气喷头透过隔板后进入紧邻预混腔下的空气进气层，燃气从喷头喷出，引射空气一起进入预混腔。
空气从空气进气口(9)进入，透过竖管(7)并最终抵达有燃气喷头(13)的进气层(6)，燃气从喷头(13)喷出并进入预混腔(4)的同时，空气在自身压力和引射的双重作用下进入预混腔(4)。
为了增强换热效果，各空气进层的连通竖管(7)尽量不要让气流直通，以强制产生紊流，增加气体与换热隔板(11)的接触，同样原因，各烟气层的连通竖管(8)也不要让气流直通。
本方案的优点是结构紧凑、换热效率高，气流阻力小。
实施例二：图2中结构与实施例一基本相同，封闭燃烧炉头由工作台面(2)、炉头外腔(3)构成封闭腔体，内部由预混腔(4)和燃烧板(1)形成红外线燃烧炉头，空气通过空气进气口(9)进入，透过多个进气层后进入预混腔(4)，燃气通过置于烟气层中的燃气管(10)抵达燃气喷头(13)，喷射进入预混腔(4)，燃气/空气混合后透过燃烧板进入密闭腔体燃烧，发出红外辐射并产生高温烟气，这些烟气沿排气方向汇聚至烟气层(5)，并透过各烟气层后从排气口(12)排出。
本例中空气层(8)中间没有烟气连通竖管，而是形成一个独立空气腔体，烟气从该腔体外与炉头外腔(3)之间的间隙通过，该结构使空气腔被高温烟气腔包围，预热效果也很好。
上述实施例仅仅是对本发明的优选实施例进行描述，并非对本发明的构思和范围进行限定，在不脱离本发明设计思想的前提下，本领域中专业技术人员对本发明的技术方案所采取的各种变化和改进，均属于本发明的保护范围。

Claims (4)

  1. 一种封闭燃烧炉头夹层式换热结构，包括：封闭式燃烧腔体(3)、进气流经的隔层(6)、烟气流经的隔层(5)，其特征在于：烟气层(5)与进气层(6)交错重叠，烟气层(5)间有竖管(8)连通，进气层(6)间也有竖管(7)连通，烟气从燃烧面沿排气通道汇聚至烟气层、并通过层间连通的竖管(8)最终汇聚至排气管(12)，同时空气进气从进气口(9)强制送入空气层(6)、并透过进气层间的竖管(7)逐层上移并最终与燃气管(13)喷出的燃气一起进入预混腔(4)，因烟气与进气温差很大，气流经过这些夹层时通过壁面进行换热，烟气温度降低、燃气/空气进气温度上升，从而实现高温烟气与室温燃气/空气的热交换。
  2. 根据权利要求1所述的一种封闭燃烧炉头夹层式换热结构，其特征在于：所述烟气层(5)和空气层(5)数量不限，只要能保证进出气流的顺畅即可，当气流受阻时需要增加进气动力或采取强制排气措施。
  3. 根据权利要求1所述的一种封闭燃烧炉头夹层式换热结构，其特征在于：所述烟气层间竖管(8)或进气层间竖管(6)形式不限，也可以是隔层间外围或内部贯通的缝隙。
  4. 根据权利要求1所述的一种封闭燃烧炉头夹层式换热结构，其特征在于：燃气进气管(10)及其分支管可布局在烟气层中，利用烟气余热预热燃气进气，燃气喷头透过层间隔板进入紧邻预混腔下的空气层。
PCT/CN2018/083198 2017-04-21 2018-04-16 一种封闭燃烧炉头夹层式换热结构 WO2018192442A1 (zh)

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CN110487097A (zh) * 2019-08-26 2019-11-22 周封 构成多种空间立体风路系统的蓄热砖结构
CN113670079B (zh) * 2021-09-08 2024-03-12 洛阳君江建材科技有限公司 一种泡花碱窑炉多级预热装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4094297A (en) * 1976-02-02 1978-06-13 Ballentine Earle W Ceramic-glass burner
WO1998012480A1 (en) * 1996-09-23 1998-03-26 Gastec N.V. Ceramic hot plate
CN204806395U (zh) * 2015-07-01 2015-11-25 慈溪正军厨具配件有限公司 自然引射式灶头

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4094297A (en) * 1976-02-02 1978-06-13 Ballentine Earle W Ceramic-glass burner
WO1998012480A1 (en) * 1996-09-23 1998-03-26 Gastec N.V. Ceramic hot plate
CN204806395U (zh) * 2015-07-01 2015-11-25 慈溪正军厨具配件有限公司 自然引射式灶头

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