CN206682935U - A kind of low emission cool flame multistage premix burner - Google Patents
A kind of low emission cool flame multistage premix burner Download PDFInfo
- Publication number
- CN206682935U CN206682935U CN201720414951.2U CN201720414951U CN206682935U CN 206682935 U CN206682935 U CN 206682935U CN 201720414951 U CN201720414951 U CN 201720414951U CN 206682935 U CN206682935 U CN 206682935U
- Authority
- CN
- China
- Prior art keywords
- flame
- gas
- air
- pipe
- jet
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 239000000446 fuel Substances 0.000 claims abstract description 38
- 238000002485 combustion reaction Methods 0.000 claims abstract description 34
- 238000002347 injection Methods 0.000 claims description 37
- 239000007924 injection Substances 0.000 claims description 37
- 239000000203 mixture Substances 0.000 claims description 18
- 230000007704 transition Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 58
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 11
- 239000003546 flue gas Substances 0.000 abstract description 11
- 239000003507 refrigerant Substances 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical compound [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Gas Burners (AREA)
Abstract
本实用新型提供一种低排放冷焰多级预混燃烧器，包括点火枪、燃气喷气管，所述燃气喷气管上设有三处喷气出口，通过三个燃烧区，分级燃烧；预混火焰从喷气出口高速喷射出，迅速接触到热传输管，使得火焰温度快速下降，接触到冷媒的火焰，被反射回来，形成燃烧的气帘，使得燃烧后的废气参与到二次燃烧中，充当烟气再循环，有效降低了氮氧化物的产生；独特的文丘里预混结构使得空气、燃料混合更充分；通过高调节比，宽空气过剩系数范围的点火枪，保证了火焰能够顺利建立。
The utility model provides a low-emission cold-flame multi-stage premixed burner, which includes an ignition gun and a gas jet pipe. The gas jet pipe is provided with three jet outlets, and passes through three combustion zones for staged combustion; the premixed flame flows from the The jet outlet jets out at high speed and quickly touches the heat transfer pipe, causing the flame temperature to drop rapidly. When it touches the refrigerant flame, it is reflected back to form a burning air curtain, so that the burned exhaust gas participates in the secondary combustion and acts as the flue gas re-combustion. The cycle effectively reduces the generation of nitrogen oxides; the unique Venturi premixing structure makes the air and fuel mix more fully; the ignition gun with a high adjustment ratio and a wide range of air excess coefficient ensures that the flame can be established smoothly.
Description
技术领域technical field
本实用新型涉及一种燃烧器，特别是一种锅炉用低排放冷焰多级预混燃烧器。The utility model relates to a burner, in particular to a low-emission cold flame multi-stage premix burner for a boiler.
背景技术Background technique
随着工业快速发展，环境污染变得日益严重，高效低污染的燃烧技术及产品的开发研究日趋重要。With the rapid development of industry, environmental pollution has become increasingly serious, and the development and research of high-efficiency and low-pollution combustion technology and products have become increasingly important.
低污染的燃烧即是控制燃烧过程中氮氧化物(NOX)的排放，NOX的生成主要与燃烧火焰的温度、燃烧气体中氧的浓度、燃烧气体在高温下的滞留时间及燃料中的含氧量因素有关。Low-pollution combustion is to control the emission of nitrogen oxides (NO X ) during the combustion process. The formation of NO X is mainly related to the temperature of the combustion flame, the concentration of oxygen in the combustion gas, the residence time of the combustion gas at high temperature and the concentration of oxygen in the fuel. related to the oxygen content factor.
现有的锅炉燃烧器使用金属纤维做燃烧管，将预混燃气在金属表面燃烧，为了实现低排放，通常过剩空气需要控制在40％左右，表面燃烧的效率低。由于金属纤维的纤维网格小，且多层排列，一旦空气中的脏的颗粒进入，会堵住网格，导致局部温度变高，金属纤维随之被烧毁。Existing boiler burners use metal fibers as combustion tubes to burn premixed gas on the metal surface. In order to achieve low emissions, the excess air usually needs to be controlled at about 40%, and the efficiency of surface combustion is low. Because the fiber mesh of the metal fiber is small and arranged in multiple layers, once the dirty particles in the air enter, it will block the mesh, causing the local temperature to rise, and the metal fiber will be burned accordingly.
烟气再循环技术即将一部分排气返回到送气系统，降低混合气中的氧浓度，起热量吸收体的作用，不致使燃烧温度变得过高，从而抑制氮氧化物的生成。烟气循环率通常是尾气总量的5-20％，使NOX产生量降低10-90％。但是利用烟气再循环，需要增加管路，空间不足，如果烟气和助燃风机入口距离远，废气温度太高，不太实用，冬天温度低，会产生冷凝水，增加了维修难度。Flue gas recirculation technology is to return part of the exhaust gas to the air supply system, reduce the oxygen concentration in the mixed gas, and act as a heat absorber, so as not to cause the combustion temperature to become too high, thereby inhibiting the formation of nitrogen oxides. The flue gas circulation rate is usually 5-20% of the total exhaust gas, which reduces the NO X production by 10-90%. However, the use of flue gas recirculation requires additional pipelines and insufficient space. If the distance between the flue gas and the inlet of the combustion-supporting fan is long, the temperature of the exhaust gas will be too high, which is not practical. The temperature is low in winter, and condensed water will be generated, which increases the difficulty of maintenance.
实用新型内容Utility model content
为了克服上述现有技术的不足，本实用新型的目的是提供了一种结构简单的低排放冷焰多级预混燃烧器。In order to overcome the deficiencies of the above-mentioned prior art, the purpose of this utility model is to provide a low-emission cold flame multi-stage premixed burner with simple structure.
为达到上述目的，本实用新型解决其技术问题所采用的技术方案是：In order to achieve the above object, the technical solution adopted by the utility model to solve the technical problems is:
一种低排放冷焰多级预混燃烧器，包括：A low emission cold flame multi-stage premix burner comprising:
燃气喷气管，设有三处喷气出口，所述燃气喷气管外部区域与被加热体之间形成燃烧室；The gas jet pipe is provided with three jet outlets, and a combustion chamber is formed between the outer area of the gas jet pipe and the heated body;
点火枪，其点火口设置在所述三处喷气出口的任意一处或多处。As for the ignition gun, its ignition port is arranged at any one or more of the three jet outlets.
进一步地，所述燃气喷气管头部的顶壁上开有第一喷气出口，用于当流过所述第一喷气出口的空气-燃料混合物的一部分被点燃时建立第一火焰，所述第一火焰从所述燃气喷气管头部的顶壁向外延伸，所述第一喷气出口为多个小通孔，所述小通孔从顶壁中心向周向侧壁延伸排列。Further, a first jet outlet is opened on the top wall of the head of the gas jet pipe for establishing a first flame when a part of the air-fuel mixture flowing through the first jet outlet is ignited. A flame extends outward from the top wall of the head of the gas injection pipe, and the first gas injection outlet is a plurality of small through holes, and the small through holes are arranged extending from the center of the top wall to the circumferential side wall.
进一步地，所述燃气喷气管头部的周向侧壁开有第二喷气出口，所述第二喷气出口朝向被加热体，用于当流过所述第二喷气出口的空气-燃料混合物的一部分被点燃时在所述燃烧室中建立第二火焰，所述第二火焰在被加热体表面形成稳定的尖端。Further, the circumferential side wall of the head of the gas injection pipe is provided with a second jet outlet, and the second jet outlet faces the heated body for the air-fuel mixture flowing through the second jet outlet. When a part is ignited, a second flame is established in the combustion chamber, and the second flame forms a stable tip on the surface of the heated body.
进一步地，所述燃气喷气管的周向侧壁开有第三喷气出口，所述第三喷气出口朝向被加热体，用于当流过所述第三喷气出口的空气-燃料混合物的一部分被点燃时在所述燃烧室中建立第三火焰，所述第三火焰在被加热体表面形成稳定的尖端。Further, the circumferential side wall of the gas injection pipe is provided with a third injection outlet, and the third injection outlet faces the heated body, for when a part of the air-fuel mixture flowing through the third injection outlet is When ignited, a third flame is established in the combustion chamber, and the third flame forms a stable tip on the surface of the heated body.
采用上述优选的方案，通过三个燃烧区，分级燃烧；点火枪设在第一喷气出口处，第一火焰在此产生，在点燃时在中心和周边边缘之间延伸，以保持分离的第二火焰的点燃；第一火焰产生之后第二喷气出口处的第二火焰(主火)即被引燃；当主火流量加大时，第三喷气出口处的第三火焰产生，形成花瓣形火焰；第二火焰(主火)从第二喷气出口高速喷射出，迅速接触到被加热体，使得火焰温度快速下降，接触到冷媒的火焰，被反射回来，形成燃烧的气帘，使得燃烧后的废气参与到第三喷气出口处的二次燃烧中，充当烟气再循环，有效降低了氮氧化物的产生。Using the above-mentioned preferred scheme, through three combustion zones, staged combustion; the ignition gun is located at the first jet outlet, where the first flame is generated, and when ignited, it extends between the center and the peripheral edge to maintain the separated second The ignition of the flame; the second flame (main fire) at the second jet outlet was ignited after the first flame was produced; when the flow of the main fire was increased, the third flame at the third jet outlet was produced to form a petal-shaped flame; The second flame (main fire) is ejected at high speed from the second jet outlet, and quickly touches the heated body, causing the flame temperature to drop rapidly. When it touches the flame of the refrigerant, it is reflected back to form a burning air curtain, so that the exhaust gas after combustion participates in the process. In the secondary combustion at the third jet outlet, it acts as flue gas recirculation, effectively reducing the generation of nitrogen oxides.
进一步地，所述点火枪位于所述燃气喷气管内部，所述点火枪包括由里向外依次套设的火花塞、点火枪燃气管、点火枪空气管，所述火花塞点火口、点火枪燃气管出口、点火枪空气管出口均设置在所述第一喷气出口处，所述点火枪燃气管、点火枪空气管尾部分别设有点火枪燃气进口、点火枪空气进口。Further, the ignition gun is located inside the gas injection pipe, and the ignition gun includes a spark plug, an ignition gun gas pipe, and an ignition gun air pipe that are sequentially sleeved from the inside to the outside, and the ignition port of the spark plug, the ignition gun gas pipe The outlet and the outlet of the ignition gun air pipe are all arranged at the first jet outlet, and the tail of the ignition gun gas pipe and the ignition gun air pipe are respectively provided with an ignition gun gas inlet and an ignition gun air inlet.
采用上述优选的方案，点火枪设于燃气喷气管内部，拥有单独的燃气管、空气管结构，其过剩空气系数λ范围可以实现0.5-100，用于实现抗复杂燃烧环境气压、气流的变化，稳定建立点火火焰。Using the above-mentioned preferred scheme, the ignition gun is set inside the gas injection pipe, with a separate gas pipe and air pipe structure, and its excess air coefficient λ range can be 0.5-100, which is used to resist changes in air pressure and airflow in complex combustion environments. Steady establishment of the ignition flame.
进一步地，所述第一喷气出口导出所述空气-燃料混合物的10％-30％的出气量，所述第二喷气出口导出所述空气-燃料混合物的40％-80％的出气量，所述第三喷气出口导出所述空气-燃料混合物的10％-30％的出气量。Further, the first jet outlet leads out 10%-30% of the air-fuel mixture, and the second jet outlet leads out 40%-80% of the air-fuel mixture, so The third jet outlet leads out 10%-30% of the air-fuel mixture.
采用上述优选的方案，通过各喷气出口的构造提供各喷气出口相应的出气量，以实现烟气再循环，确保氮氧化物的低排放。Using the above-mentioned preferred solution, the configuration of each gas injection outlet provides the corresponding gas output of each gas injection outlet, so as to realize flue gas recirculation and ensure low emission of nitrogen oxides.
进一步地，所述第二喷气出口与第三喷气出口之间的距离为所述燃气喷气管直径的2-4倍。Further, the distance between the second gas injection outlet and the third gas injection outlet is 2-4 times the diameter of the gas injection pipe.
进一步地，被加热体直径为所述燃气喷气管直径的2-4倍。Further, the diameter of the heated body is 2-4 times the diameter of the gas injection pipe.
采用上述优选的方案，合适的尺寸比例设计，更易实现冷焰，保证燃烧的充分和高效，实现超低排放。Adopting the above-mentioned optimal scheme and proper size ratio design, it is easier to realize cooling flame, ensure sufficient and high-efficiency combustion, and achieve ultra-low emission.
进一步地，所述燃气喷气管尾端连接有预混箱，所述预混箱一端与空气供给管相连通，所述预混箱内设置有文丘里管，所述文丘里管大开口端与所述预混箱内壁贴合，所述文丘里管的小开口端与所述燃气喷气管尾端开口相连通，所述文丘里管外部区域与所述预混箱内部区域所形成的腔道为燃料供给通道，所述预混箱箱壁靠文丘里管大开口端设有燃料供给口，所述文丘里管靠小开口端的管壁上设有燃料输出口。Further, the tail end of the gas injection pipe is connected to a premixing box, and one end of the premixing box is connected to the air supply pipe, and a Venturi tube is arranged inside the premixing box, and the large opening end of the Venturi tube is connected to the The inner wall of the premixing box is attached, the small opening end of the Venturi tube communicates with the tail end opening of the gas injection pipe, and the cavity formed by the outer area of the Venturi tube and the inner area of the premixing box It is a fuel supply channel, the wall of the premixing tank is provided with a fuel supply port near the large opening end of the Venturi tube, and a fuel output port is provided on the wall of the Venturi tube near the small opening end.
采用上述优选的方案，空气通过文丘里管缩小的过流断面时，出现流速增大的现象，流速的增大伴随着空气压力的降低，对燃料产生了抽吸作用，使得空气与燃料更好地进行预混合。With the above preferred scheme, when the air passes through the reduced flow section of the Venturi tube, the flow velocity increases, and the increase of the flow velocity is accompanied by the decrease of the air pressure, which produces a suction effect on the fuel, making the air and fuel better for pre-mixing.
进一步地，所述空气供给管与所述预混箱垂直设置，连通过渡面为弧面。Further, the air supply pipe is arranged vertically to the premixing tank, and the connecting transition surface is an arc surface.
采用上述优选的方案，使得空气在预混箱内形成搅动气流，能够与燃料进行更好预混。By adopting the above-mentioned preferred solution, the air forms agitated airflow in the premix tank, which can be better premixed with the fuel.
附图说明Description of drawings
为了更清楚地说明本实用新型实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1是本实用新型的结构示意图；Fig. 1 is the structural representation of the utility model;
图2是燃气喷气管的结构示意图；Fig. 2 is the structural representation of gas injection pipe;
图3是燃气喷气管与被加热体间生成的火焰示意图；Fig. 3 is a schematic diagram of the flame generated between the gas injection pipe and the heated body;
图4是点火枪的结构示意图。Fig. 4 is a structural schematic diagram of the ignition gun.
图中数字和字母所表示的相应部件的名称：Names of corresponding parts indicated by numbers and letters in the figure:
1-被加热体；2-燃气喷气管；21-第一喷气出口；22-第二喷气出口；23-第三喷气出口；211-第一火焰；221-第二火焰；231-第三火焰；3-预混箱；4-文丘里管；5-空气供给管；6-燃料供给口；7-燃料输出口；8-点火枪；81-火花塞；811-火花塞点火口；82-点火枪燃气管；821-点火枪燃气进口；83-点火枪空气管；831-点火枪空气进口。1-Heated body; 2-Gas jet pipe; 21-First jet outlet; 22-Second jet outlet; 23-Third jet outlet; 211-First flame; 221-Second flame; 231-Third flame ;3-premixing box; 4-venturi tube; 5-air supply pipe; 6-fuel supply port; 7-fuel output port; 8-ignition gun; 81-spark plug; 811-spark plug ignition port; 82-ignition gun Gas pipe; 821-the gas inlet of the ignition gun; 83-the air pipe of the ignition gun; 831-the air inlet of the ignition gun.
具体实施方式detailed description
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本实用新型一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
为了达到本实用新型的目的，如图1所示，本实用新型的一种实施方式为：一种低排放冷焰多级预混燃烧器，包括燃气喷气管2、点火枪8，燃气喷气管2设有三处喷气出口，燃气喷气管2外部区域与被加热体1之间形成燃烧室；点火枪8点火口设置在所述三处喷气出口的任意一处或多处。In order to achieve the purpose of this utility model, as shown in Figure 1, an embodiment of this utility model is: a low-emission cold flame multi-stage premixed burner, including a gas injection pipe 2, an ignition gun 8, a gas injection pipe 2. There are three jet outlets, and a combustion chamber is formed between the outer area of the gas jet pipe 2 and the heated body 1; the ignition port of the ignition gun 8 is set at any one or more of the three jet outlets.
采用上述技术方案的有益效果是：通过三个燃烧区，分级燃烧，有效降低了氮氧化物的产生。The beneficial effect of adopting the above-mentioned technical scheme is that: through the three combustion zones, staged combustion effectively reduces the generation of nitrogen oxides.
如图2-3所示，在本实用新型的另一些实施方式中，为了达到烟气再循环，以实现低排放的目的，燃气喷气管2头部的顶壁上开有第一喷气出口21，用于当流过第一喷气出口21的空气-燃料混合物的一部分被点燃时建立第一火焰211，第一火焰211从燃气喷气管2头部的顶壁向外延伸，第一喷气出口21为多个小通孔，所述小通孔从顶壁中心向周向侧壁延伸排列；燃气喷气管2头部的周向侧壁开有第二喷气出口22，第二喷气出口22朝向被加热体1，用于当流过第二喷气出口22的空气-燃料混合物的一部分被点燃时在所述燃烧室中建立第二火焰221，第二火焰221在被加热体1表面形成稳定的尖端；燃气喷气管2的周向侧壁开有第三喷气出口23，第三喷气出口23朝向被加热体1，用于当流过第三喷气出口23的空气-燃料混合物的一部分被点燃时在所述燃烧室中建立第三火焰231，第三火焰231在被加热体1表面形成稳定的尖端。As shown in Figures 2-3, in other embodiments of the present invention, in order to achieve the purpose of flue gas recirculation and low emission, the top wall of the head of the gas injection pipe 2 is provided with a first air injection outlet 21 , for establishing a first flame 211 when a part of the air-fuel mixture flowing through the first jet outlet 21 is ignited, the first flame 211 extends outward from the top wall of the gas jet pipe 2 head, the first jet outlet 21 It is a plurality of small through holes, and the small through holes extend from the center of the top wall to the circumferential side wall; the circumferential side wall of the head of the gas injection pipe 2 has a second jet outlet 22, and the second jet outlet 22 is directed toward the The heating body 1 is used to establish a second flame 221 in the combustion chamber when a part of the air-fuel mixture flowing through the second jet outlet 22 is ignited, and the second flame 221 forms a stable tip on the surface of the heated body 1 The circumferential side wall of the gas jet pipe 2 has a third jet outlet 23, the third jet outlet 23 faces the heated body 1, for when a part of the air-fuel mixture flowing through the third jet outlet 23 is ignited A third flame 231 is established in the combustion chamber, and the third flame 231 forms a stable tip on the surface of the heated body 1 .
通过三个燃烧区，分级燃烧；点火枪8设在第一喷气出口21处，第一火焰211在此产生，在点燃时在中心和周边边缘之间延伸，以保持分离的第二火焰221的点燃；第一火焰211产生之后第二喷气出口22处的第二火焰221(主火)即被引燃；当主火流量加大时，第三喷气出口23处的第三火焰231产生，形成花瓣形火焰。采用上述技术方案的有益效果是：第二火焰221(主火)从第二喷气出口22高速喷射出，迅速接触到被加热体1，使得火焰温度快速下降，接触到冷媒的火焰，被反射回来，形成燃烧的气帘，使得燃烧后的废气参与到第三喷气出口23处的二次燃烧中，充当烟气再循环，有效降低了氮氧化物的产生。Through three combustion zones, staged combustion; the ignition gun 8 is located at the first jet outlet 21, where the first flame 211 is generated, extending between the center and the peripheral edge when ignited, to maintain the separation of the second flame 221 Ignite; the second flame 221 (main fire) at the second jet outlet 22 places was ignited after the first flame 211 produced; when the main fire flow increased, the third flame 231 at the third jet outlet 23 places produced, forming petal shaped flame. The beneficial effect of adopting the above technical solution is: the second flame 221 (main flame) is jetted out from the second jet outlet 22 at a high speed, and quickly contacts the heated body 1, so that the temperature of the flame drops rapidly, and the flame that touches the refrigerant is reflected back , forming a combustion air curtain, so that the burned exhaust gas participates in the secondary combustion at the third gas injection outlet 23, which serves as flue gas recirculation, and effectively reduces the generation of nitrogen oxides.
如图4所示，在本实用新型的另一些实施方式中，为了达到稳定建立点火火焰的目的，点火枪8位于燃气喷气管2内部，点火枪8包括由里向外依次套设的火花塞81、点火枪燃气管82、点火枪空气管83，火花塞点火口811、点火枪燃气管出口、点火枪空气管出口均设置在第一喷气出口21处，点火枪燃气管82、点火枪空气管83尾部分别设有点火枪燃气进口821、点火枪空气进口831。采用上述技术方案的有益效果是：点火枪8设于燃气喷气管2内部，拥有单独的燃气管、空气管结构，其过剩空气系数入范围可以实现0.5-100，用于实现抗复杂燃烧环境气压、气流的变化，稳定建立点火火焰。As shown in Figure 4, in other embodiments of the present utility model, in order to achieve the purpose of stably establishing the ignition flame, the ignition gun 8 is located inside the gas injection pipe 2, and the ignition gun 8 includes spark plugs 81 that are sequentially sleeved from the inside to the outside. , ignition gun gas pipe 82, ignition gun air pipe 83, spark plug ignition port 811, ignition gun gas pipe outlet, ignition gun air pipe outlet are all arranged at the first jet outlet 21, ignition gun gas pipe 82, ignition gun air pipe 83 The tail is respectively provided with an ignition gun gas inlet 821 and an ignition gun air inlet 831. The beneficial effect of adopting the above-mentioned technical solution is: the ignition gun 8 is arranged inside the gas injection pipe 2, has a separate gas pipe and air pipe structure, and its excess air coefficient can be realized in the range of 0.5-100, which is used to realize resistance to complex combustion environment air pressure , Changes in airflow, stable establishment of ignition flame.
在本实用新型的另一些实施方式中，为了达到更好地实现烟气再循环的目的，第一喷气出口21导出所述空气-燃料混合物的10％-30％的出气量，第二喷气出口22导出所述空气-燃料混合物的40％-80％的出气量，第三喷气出口23导出所述空气-燃料混合物的10％-30％的出气量。采用上述技术方案的有益效果是：通过各喷气出口的构造提供各喷气出口相应的出气量，以实现烟气再循环，确保氮氧化物的低排放。In other embodiments of the present utility model, in order to better realize the purpose of flue gas recirculation, the first jet outlet 21 leads out 10%-30% of the air-fuel mixture, and the second jet outlet 22 leads out the air output of 40%-80% of the air-fuel mixture, and the third jet outlet 23 leads out the air output of 10%-30% of the air-fuel mixture. The beneficial effect of adopting the above technical solution is that: through the configuration of each jet outlet, the corresponding gas output of each jet outlet is provided, so as to realize flue gas recirculation and ensure low emission of nitrogen oxides.
在本实用新型的另一些实施方式中，为了达到实现冷焰的目的，所述第二喷气出口22与第三喷气出口23之间的距离为燃气喷气管2直径的2-4倍；被加热体1直径(ΦB)为燃气喷气管2直径(ΦA)的2-4倍。采用上述技术方案的有益效果是：合适的尺寸比例设计，更易实现冷焰，保证燃烧的充分和高效，实现超低排放。In other embodiments of the present utility model, in order to achieve the purpose of cooling the flame, the distance between the second jet outlet 22 and the third jet outlet 23 is 2-4 times the diameter of the gas jet pipe 2; Body 1 diameter (ΦB) is 2-4 times of gas injection pipe 2 diameter (ΦA). The beneficial effects of adopting the above-mentioned technical solution are: suitable size ratio design, easier realization of flame cooling, sufficient and efficient combustion, and ultra-low emission.
在本实用新型的另一些实施方式中，为了达到空气与燃料充分预混的目的，燃气喷气管2尾端连接有预混箱3，预混箱3一端与空气供给管5相连通，预混箱3内设置有文丘里管4，文丘里管4大开口端与预混箱3内壁贴合，文丘里管4的小开口端与燃气喷气管2尾端开口相连通，文丘里管4外部区域与预混箱3内部区域所形成的腔道为燃料供给通道，预混箱3箱壁靠文丘里管4大开口端设有燃料供给口6，文丘里管4靠小开口端的管壁上设有燃料输出口7。采用上述技术方案的有益效果是：空气通过文丘里管缩小的过流断面时，出现流速增大的现象，流速的增大伴随着空气压力的降低，对燃料产生了吸附作用，使得空气与燃料更好地进行预混合。In other embodiments of the present utility model, in order to achieve the purpose of fully premixing air and fuel, the tail end of the gas injection pipe 2 is connected with a premixing box 3, and one end of the premixing box 3 is connected with the air supply pipe 5, and the premixing A Venturi tube 4 is arranged inside the box 3, the large opening end of the Venturi tube 4 is attached to the inner wall of the premixing box 3, the small opening end of the Venturi tube 4 communicates with the tail end opening of the gas injection pipe 2, and the outside of the Venturi tube 4 The cavity formed by the area and the inner area of the premixed tank 3 is a fuel supply channel. The wall of the premixed tank 3 is provided with a fuel supply port 6 near the large opening end of the Venturi tube 4, and the venturi tube 4 is located on the wall of the small opening end. A fuel outlet 7 is provided. The beneficial effect of adopting the above-mentioned technical solution is: when the air passes through the reduced flow section of the Venturi tube, the flow velocity increases, and the increase of the flow velocity is accompanied by the decrease of the air pressure, which has an adsorption effect on the fuel, so that the air and fuel Better to pre-mix.
在本实用新型的另一些实施方式中，为了达到形成搅动空气流的目的，空气供给管5与预混箱3垂直设置，连通过渡面为弧面。采用上述技术方案的有益效果是：使得空气在预混箱内形成搅动气流，能够与燃料进行更好预混。In other embodiments of the present utility model, in order to achieve the purpose of forming agitated air flow, the air supply pipe 5 is vertically arranged with the premixing tank 3 , and the connecting transition surface is an arc surface. The beneficial effect of adopting the above-mentioned technical solution is that the air can form agitated airflow in the premix tank, which can be better premixed with fuel.
上述实施例只为说明本实用新型的技术构思及特点，其目的在于让本领域普通技术人员能够了解本实用新型的内容并加以实施，并不能以此限制本实用新型的保护范围，凡根据本实用新型精神实质所作的等效变化或修饰，都应涵盖在本实用新型的保护范围内。The above-mentioned embodiments are only to illustrate the technical conception and characteristics of the present utility model. Equivalent changes or modifications made by the spirit of the utility model shall fall within the protection scope of the utility model.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720414951.2U CN206682935U (en) | 2017-04-19 | 2017-04-19 | A kind of low emission cool flame multistage premix burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720414951.2U CN206682935U (en) | 2017-04-19 | 2017-04-19 | A kind of low emission cool flame multistage premix burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206682935U true CN206682935U (en) | 2017-11-28 |
Family
ID=60400453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720414951.2U Expired - Fee Related CN206682935U (en) | 2017-04-19 | 2017-04-19 | A kind of low emission cool flame multistage premix burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206682935U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949471A (en) * | 2017-04-19 | 2017-07-14 | 安德森热能科技（苏州）有限责任公司 | A kind of multistage premix burner of low emission cool flame |
| CN108488795A (en) * | 2018-05-21 | 2018-09-04 | 北京联众华禹环保科技有限公司 | A kind of porous nozzles and gas water jacket furnace low NO |
| CN113757646A (en) * | 2021-08-13 | 2021-12-07 | 西安交通大学 | A flue gas recycling combustion system using a venturi to eject natural gas and oxygen |
-
2017
- 2017-04-19 CN CN201720414951.2U patent/CN206682935U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949471A (en) * | 2017-04-19 | 2017-07-14 | 安德森热能科技（苏州）有限责任公司 | A kind of multistage premix burner of low emission cool flame |
| CN106949471B (en) * | 2017-04-19 | 2023-09-01 | 安德森热能科技（苏州）有限责任公司 | Low-emission cold flame multistage premix burner |
| CN108488795A (en) * | 2018-05-21 | 2018-09-04 | 北京联众华禹环保科技有限公司 | A kind of porous nozzles and gas water jacket furnace low NO |
| CN113757646A (en) * | 2021-08-13 | 2021-12-07 | 西安交通大学 | A flue gas recycling combustion system using a venturi to eject natural gas and oxygen |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106949471B (en) | Low-emission cold flame multistage premix burner | |
| CN111442271B (en) | A flue gas internal circulation low nitrogen burner | |
| CN105737152B (en) | A kind of burner for being classified premixed swirl low nitrogen burning | |
| CN109695877B (en) | Two-stage combustion type fire grate burner | |
| CN105351925B (en) | Low emission fuel gas buring stove and its combustion air collocation method | |
| CN104613473B (en) | A kind of porous gas jet burner | |
| CN207539904U (en) | Ultralow nitrogen gas burner | |
| CN203489263U (en) | Oxygen-rich combustor | |
| CN102966953B (en) | A kind of burner being applicable to ultra-long radiant tube | |
| CN207019063U (en) | A kind of low heat value/low-pressure gas burner | |
| CN109323254B (en) | Full premix water-cooling low-nitrogen burner for gas two-stage injection air | |
| CN206682935U (en) | A kind of low emission cool flame multistage premix burner | |
| CN109899786A (en) | Nonflame low NO and nonflame low nitrogen burning method | |
| CN107461742B (en) | Graded flameless low-nitrogen combustion head | |
| CN108224420B (en) | A secondary air coupled low NOx combustion system for gas boilers | |
| CN204460213U (en) | A kind of porous gas jet burner | |
| CN103032891B (en) | A kind of many eddy combustion methods | |
| CN201568960U (en) | Multi-stage pulverized coal burner | |
| CN109442402B (en) | Water-cooling premixed combustion method and device | |
| CN203628651U (en) | Combustor | |
| CN102410533A (en) | Swirl triple-tube burner | |
| CN217004457U (en) | A gas-fired low-nitrogen burner with partially premixed high and low speed configuration | |
| CN109268827B (en) | A low calorific value gas burner and hot air furnace | |
| CN110594728A (en) | An oxygen-enriched pulverized coal burner and its combustion method based on suction injection | |
| CN212132430U (en) | gas burner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171128 |