CN102072494B - Combustor - Google Patents
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- CN102072494B CN102072494B CN 201110046241 CN201110046241A CN102072494B CN 102072494 B CN102072494 B CN 102072494B CN 201110046241 CN201110046241 CN 201110046241 CN 201110046241 A CN201110046241 A CN 201110046241A CN 102072494 B CN102072494 B CN 102072494B
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- 239000007789 gas Substances 0.000 claims abstract description 48
- 239000000446 fuel Substances 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 239000002699 waste material Substances 0.000 claims abstract description 31
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002912 waste gas Substances 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 239000003345 natural gas Substances 0.000 claims abstract description 12
- 239000003381 stabilizer Substances 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 23
- 231100000331 toxic Toxicity 0.000 abstract description 9
- 230000002588 toxic effect Effects 0.000 abstract description 9
- 239000000295 fuel oil Substances 0.000 abstract description 7
- 239000010842 industrial wastewater Substances 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 description 7
- 239000003921 oil Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 239000010815 organic waste Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002894 chemical waste Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
一种燃烧器，包括主燃油枪，点火枪，文丘利管配风器，风箱及其伺服调节机构，还包括废气枪和废液枪，所述的三种燃料枪为同心结构分布于一次风圆形风道中，主燃油枪居中，其外为套管式的主燃气枪，最外层为套管式的废气枪，废液枪则以多管形式分布于二次风环形风道中，所述的风箱入口设有一个总风门，总风门下游分别设置了主燃料助燃风风门、废气助燃风风门、废液助燃风风门，所述的主燃料助燃风风门、废气助燃风风门、废液助燃风风门为同轴式结构，所述的各风门均设有联动式伺服调节机构。适用于燃油或天然气为主燃料，对工业有毒、有害的有机废水、废气进行无害化焚烧处理的焚烧炉，也可适用于以不同种类液体燃料或不同华白数气体燃料混和燃烧的各类热能热工设备。
A burner, including a main fuel gun, an ignition gun, a Venturi tube air distributor, an air box and its servo adjustment mechanism, and also includes a waste gas gun and a waste liquid gun. The three fuel guns are concentric structures distributed in the primary air In the circular air duct, the main fuel gun is in the center, the casing-type main gas gun is outside it, the outermost layer is the sleeve-type exhaust gas gun, and the waste liquid gun is distributed in the secondary air circular air duct in the form of multiple tubes. The inlet of the bellows is provided with a main damper, and the main fuel combustion air damper, the exhaust gas combustion air damper, and the waste liquid combustion air damper are respectively arranged downstream of the main damper. The dampers are of coaxial structure, and each damper is provided with a linkage servo adjustment mechanism. It is suitable for incinerators that use fuel oil or natural gas as the main fuel to incinerate toxic and harmful industrial waste water and waste gas in a harmless manner. Thermal energy thermal equipment.
Description
技术领域 technical field
本发明涉及一种燃烧器，特别是一种可对工业有毒、有害的有机废气、废液进行无害化焚烧处理的燃烧器。 The invention relates to a burner, in particular to a burner which can perform harmless incineration treatment of industrial toxic and harmful organic waste gas and waste liquid.
背景技术 Background technique
随着我国经济总量的迅速扩张，有机化工废气、废水的排放量急剧增加，其中大部分含有有机有毒有害成分，甚至含有剧毒成分（如HCN）。这些废物如不进行无害化处理，则对大气、地表水及土壤造成严重污染，而无害化处理最有效、最经济的解决方案即是高温焚烧。对有机废液、废气进行焚烧处理，不仅使其最终转化为无害物质，且充分利用了其中所包含的热能。因此，从本世纪初开始，国内有机企业即采取焚烧方法，处理这类废物。但在本专利项目实施以前，废液、废气及主燃料各采用不同单体燃烧器分别喷入焚烧炉燃烧；不仅燃烧设备数量多，且很难实施整体机组的自动控制和自动调节运行。在天津辰创环境工程科技责任有限公司为南京化工产品特种氨有限公司（中美合资）设计的化工废水、废气焚烧炉工程项目中，要求一台燃烧器能在自动控制、自动调节方式下同时燃烧多种介质。该公司对国内、外多家燃烧器厂商进行了技术咨询，均无适用于该种要求的成熟技术和成熟产品。 With the rapid expansion of my country's economic aggregate, the discharge of organic chemical waste gas and wastewater has increased sharply, most of which contain organic toxic and harmful components, and even highly toxic components (such as HCN). If these wastes are not harmlessly treated, they will cause serious pollution to the atmosphere, surface water and soil, and the most effective and economical solution for harmless treatment is high-temperature incineration. The incineration treatment of organic waste liquid and waste gas not only converts them into harmless substances, but also makes full use of the heat energy contained in them. Therefore, since the beginning of this century, domestic organic enterprises have adopted incineration methods to deal with such wastes. However, before the implementation of this patent project, waste liquid, waste gas and main fuel were sprayed into the incinerator with different single burners for combustion; not only the number of combustion equipment is large, but also it is difficult to implement automatic control and automatic adjustment operation of the whole unit. In the chemical wastewater and waste gas incinerator project designed by Tianjin Chenchuang Environmental Engineering Technology Co., Ltd. for Nanjing Chemical Products Special Ammonia Co., Ltd. (Sino-US joint venture), it is required that a burner can be automatically controlled and adjusted simultaneously. Combustion of various media. The company has conducted technical consultations with many domestic and foreign burner manufacturers, but none of them have mature technologies and mature products suitable for this kind of requirements.
发明内容 Contents of the invention
本发明其目的就在于提供一种燃烧器，可实现燃烧器和焚烧炉的自动控制和自动调节运行，具有点火可靠和燃烧稳定的特点。适用于燃油或天然气为主燃料，对工业有毒、有害的有机废水、废气进行无害化焚烧处理的焚烧炉，也可适用于以不同种类液体燃料或不同华白数气体燃料混和燃烧的各类热能热工设备。 The purpose of the present invention is to provide a burner, which can realize the automatic control and automatic adjustment operation of the burner and the incinerator, and has the characteristics of reliable ignition and stable combustion. It is suitable for incinerators that use oil or natural gas as the main fuel to incinerate toxic and harmful industrial waste water and waste gas in a harmless manner. Thermal energy thermal equipment.
实现上述目的而采取的技术方案，包括主燃油枪，点火枪，文丘利管配风器，风箱及其伺服调节机构，还包括废气枪和废液枪，所述的三种燃料枪为同心结构分布于一次风圆形风道中，主燃油枪居中，其外为套管式的主燃气枪，最外层为套管式的废气枪，废液枪则以多管形式分布于二次风环形风道中，所述的风箱入口设有一个总风门，总风门下游分别设置了主燃料助燃风风门、废气助燃风风门、废液助燃风风门，所述的主燃料助燃风风门、废气助燃风风门、废液助燃风风门为同轴式结构，所述的各风门均设有联动式伺服调节机构。 The technical solution adopted to achieve the above purpose includes a main fuel gun, an ignition gun, a Venturi tube air distributor, a bellows and its servo adjustment mechanism, and also includes a waste gas gun and a waste liquid gun. The three fuel guns described are concentric structures Distributed in the primary air circular air duct, the main fuel gun is in the center, the casing-type main gas gun is outside it, the outermost layer is the casing-type exhaust gas gun, and the waste liquid gun is distributed in the secondary air ring in the form of multiple tubes In the air duct, the entrance of the bellows is provided with a main damper, and the main fuel combustion air damper, the exhaust gas combustion air damper, and the waste liquid combustion air damper are respectively arranged downstream of the main damper, and the main fuel combustion air damper, the exhaust gas combustion air damper . The waste liquid combustion-supporting air damper has a coaxial structure, and each damper is equipped with a linkage servo adjustment mechanism.
与现有技术相比，本发明的有益效果在于， Compared with the prior art, the beneficial effect of the present invention is that,
由于中压雾化介质（一次风）的存在，可有效地克服传统燃烧器的缺点，适用于高容积热负荷的锅炉或其他燃油炉。可实现燃烧器和焚烧炉的自动控制和自动调节运行，具有点火可靠和燃烧稳定的特点。 Due to the existence of medium-pressure atomizing medium (primary air), it can effectively overcome the shortcomings of traditional burners, and is suitable for boilers with high volume heat load or other oil-fired furnaces. It can realize the automatic control and automatic adjustment operation of the burner and incinerator, and has the characteristics of reliable ignition and stable combustion.
附图说明 Description of drawings
下面结合附图对本发明作进一步详述。 The present invention will be described in further detail below in conjunction with the accompanying drawings.
图1为本装置结构立体示意图。 Figure 1 is a three-dimensional schematic diagram of the structure of the device.
图2为本装置结构示意主视图。 Figure 2 is a schematic front view of the structure of the device.
图3为本装置燃烧器旋口结构示意图。 Fig. 3 is a schematic diagram of the burner swirl structure of the device.
具体实施方式 Detailed ways
包括主油枪5，点火枪6，文丘利管配风器18，风箱1及其伺服调节机构，如图2所示，还包括废气枪和废液枪7，所述的三种燃料枪为同心结构分布于一次风圆形风道中，主油枪5居中，其外为套管式的主燃气枪，最外层为套管式的废气枪，废液枪7则以多管形式分布于二次风环形风道中，所述的风箱1入口设有一个总风门10，总风门10下游分别设置了主燃料助燃风风门9、废气助燃风风门12、废液助燃风风门11，所述的主燃料助燃风风门9、废气助燃风风门12、废液助燃风风门11为同轴式结构，所述的各风门均设有联动式伺服调节机构。
Including main oil gun 5, ignition gun 6, Venturi
所述的主燃气枪和废气枪前端设有天然气和废气动力扩散式喷嘴，燃气喷孔法线与旋口轴线夹角不小于70°，天然气和废气喷嘴气室为环状箱形结构，各有4个，二者交替分布，每两个气室之间有隔层，二个气室中心线平角为45°。 The front ends of the main gas gun and exhaust gas gun are equipped with natural gas and exhaust gas dynamic diffusion nozzles, the angle between the normal line of the gas nozzle hole and the axis of the swivel mouth is not less than 70°, and the gas chambers of the natural gas and exhaust gas nozzles are ring-shaped box structures. There are 4, the two are distributed alternately, there is a partition between every two air chambers, and the flat angle of the centerlines of the two air chambers is 45°.
所述的总风门的联动调节信号取自于安装在焚烧炉烟道上的烟气氧量传感器，主燃料助燃风风门联动调节信号取自燃料流量传感器，废气助燃风风门联动调节信号取自于废气流量传感器，废液助燃风风门联动调节信号取自于废液流量传感器。 The linkage adjustment signal of the main damper is taken from the flue gas oxygen sensor installed on the flue of the incinerator, the linkage adjustment signal of the main fuel combustion-supporting air damper is taken from the fuel flow sensor, and the linkage adjustment signal of the exhaust gas combustion-supporting air damper is taken from the waste gas The flow sensor and the waste liquid combustion-supporting air damper linkage adjustment signal are taken from the waste liquid flow sensor.
在一次风通道内设置了带旋流叶片的稳焰器15，所述的稳焰器15的轴向位置可进行调节。 A flame stabilizer 15 with swirl blades is arranged in the primary air passage, and the axial position of the flame stabilizer 15 can be adjusted.
本装置可对工业有毒、有害的有机废气、废液进行无害化焚烧处理的燃烧器（以下简称燃烧器），主要由主燃油枪、主燃气枪、废气枪、废液枪、点火枪（油或气）、风箱、风门及其伺服调节机构、文丘利管配风器、稳焰器等部件组成，焚烧热源主燃料（燃油或天燃气）与被焚烧处理的废气、废液可同时经同一旋口与助燃风混合，点火后形成多燃料混合燃烧火焰，使有毒、有害有机物最终形成H2O和CO2等无毒、无害物质。 This device is a burner for harmless incineration of industrial toxic and harmful organic waste gas and waste liquid (hereinafter referred to as burner), mainly composed of main fuel gun, main gas gun, waste gas gun, waste liquid gun, ignition gun ( Oil or gas), bellows, air door and its servo adjustment mechanism, Venturi tube air distribution device, flame stabilizer and other components, the main fuel of the incineration heat source (oil or natural gas) and the waste gas and liquid to be incinerated can be passed through at the same time The same rotary port is mixed with the combustion-supporting air, and after ignition, a multi-fuel mixed combustion flame is formed, so that toxic and harmful organic substances finally form non-toxic and harmless substances such as H2O and CO2.
三种燃料枪为同心结构分布于一次风圆形风道中。其中，主燃油枪居中，其外为套管式的主燃气枪，最外层为套管式的废气枪，废液枪则以多管形式分布于二次风环形风道中。 The three kinds of fuel guns are distributed in the primary air circular air duct in a concentric structure. Among them, the main fuel oil gun is in the center, the casing-type main gas gun is outside it, the outermost layer is the casing-type exhaust gas gun, and the waste liquid gun is distributed in the secondary air circular air duct in the form of multiple tubes.
燃油和废液雾化器均采用Y型内混式高压介质（蒸汽或压缩空气）雾化喷嘴；天然气和废气均采用动力扩散式喷嘴，燃气喷孔法线与旋口轴线夹角不小于70°。天然气和废气喷嘴体（气室）为环状箱形结构，各有4个。二者交替分布，每两个气室之间有隔层，二个气室中心线平角为45°。 Both fuel oil and waste liquid atomizers use Y-type internal mixing high-pressure medium (steam or compressed air) atomizing nozzles; natural gas and exhaust gas use dynamic diffusion nozzles, and the angle between the normal line of the gas nozzle hole and the axis of the rotary mouth is not less than 70 °. The nozzle bodies (air chambers) of natural gas and exhaust gas are annular box-shaped structures, each with 4 nozzles. The two are distributed alternately, there is a partition between every two air chambers, and the flat angle of the centerlines of the two air chambers is 45°.
风箱入口设置了一个总风门、总风门下游分别设置了主燃料（油或燃气）助燃风风门、废气助燃风风门、废液助燃风风门。各风门均设置了联动式伺服调节机构，其中，总风门的联动调节信号取自于安装在焚烧炉烟道上的烟气氧量传感器，主燃料助燃风风门联动调节信号取自燃料流量传感器，废气助燃风风门联动调节信号取自于废气流量传感器，废液助燃风风门联动调节信号取自于废液流量传感器。 A main damper is set at the inlet of the bellows, and the main fuel (oil or gas) combustion-supporting air damper, exhaust gas combustion-supporting air damper, and waste liquid combustion-supporting air damper are respectively set downstream of the main damper. Each damper is equipped with a linkage servo adjustment mechanism, wherein the linkage adjustment signal of the main damper is taken from the flue gas oxygen sensor installed on the flue of the incinerator, the linkage adjustment signal of the main fuel combustion-supporting air damper is taken from the fuel flow sensor, and the exhaust gas The linkage adjustment signal of the combustion-supporting air damper is obtained from the exhaust gas flow sensor, and the linkage adjustment signal of the combustion-supporting air damper of waste liquid is obtained from the waste liquid flow sensor.
在一次风通道内设置了带旋流叶片的稳焰器。此稳焰器的轴向位置可在一定范围内进行调节。 A flame stabilizer with swirl vanes is set in the primary air passage. The axial position of the flame stabilizer can be adjusted within a certain range.
1．燃烧器结构特征 1. Structural features of the burner
此种燃烧器有别于其他类型燃烧器的主要结构特征是：一是对多种燃烧介质（燃油、天然气、废液、废气和助燃烧空气）设置了各自的通道和进、出口，所有出口同心布置在同一旋口之内。二是对各种可燃介质均设置了独立的的风门和总风门，并对各风门设置了伺服调节机构。此种燃烧器的风箱和二次风旋流器、电子点火器的结构与转杯式燃烧器相同，燃料控制、调节机构等部件结构与调频式蒸汽/压缩空气雾化方式燃烧器相同。多种可燃介质和助燃空气从各自独立的通道和喷口进入同一个旋口，互相混合后，点火燃烧；在运行过程中，各可燃介质的喷入量和相应的助燃空气量均有流量调节机构，并可按比例实现二者的自动调节。 The main structural features of this type of burner that are different from other types of burners are: First, it has its own channels and inlets and outlets for various combustion media (fuel oil, natural gas, waste liquid, exhaust gas and combustion-supporting air). Concentrically arranged in the same rotary mouth. The second is to set independent dampers and main dampers for various combustible media, and set servo adjustment mechanism for each damper. The structure of the air box, secondary wind swirler and electronic igniter of this kind of burner is the same as that of the rotary cup burner, and the structure of the fuel control and adjustment mechanism is the same as that of the frequency-modulated steam/compressed air atomization burner. A variety of combustible media and combustion-supporting air enter the same rotary port from their independent channels and nozzles, and after mixing with each other, they are ignited and burned; during operation, the injection volume of each combustible medium and the corresponding combustion-supporting air volume have flow adjustment mechanisms , and the automatic adjustment of the two can be realized in proportion.
2．工作原理 2. working principle
焚烧炉（或其他燃油、燃气炉）冷炉启动时，燃烧器主燃油和/或主燃气喷出燃料，经点火器火焰点燃后形成主火火焰，当炉温达到设定温度（如800℃）时，废气枪和/或废水枪启动，喷入废气和/或废水，实现无害化燃烧处理。燃烧过程中的主燃料（燃油和/或天然气）输入量调节由炉温信号调节，废气和/或废水枪的启、停由炉温开关信号控制；助燃空气总量由烟气含氧量调节，各燃烧介质助燃空气量由各燃烧介质流量信号调节。由此，燃烧器及焚烧炉可实现自动控制运行。 When the incinerator (or other fuel oil, gas furnace) is cold-started, the main fuel oil and/or main gas of the burner will spray fuel, and the main flame will be formed after being ignited by the flame of the igniter. When the furnace temperature reaches the set temperature (such as 800°C ), the exhaust gas gun and/or waste water gun is activated, and the waste gas and/or waste water are injected to realize harmless combustion treatment. The main fuel (fuel and/or natural gas) input during the combustion process is regulated by the furnace temperature signal, the start and stop of the waste gas and/or waste water gun is controlled by the furnace temperature switch signal; the total amount of combustion air is regulated by the oxygen content of the flue gas , the amount of combustion-supporting air for each combustion medium is regulated by the flow signal of each combustion medium. As a result, the burner and incinerator can realize automatic control operation.
3．主要功能 3. The main function
3.1 适用于燃油和/或天然气为主燃料，对工业有毒、有害的有机废水、废气进行无害化焚烧处理的焚烧炉，也可适用于以不同种类液体燃料和/或不同华白数气体燃料混和燃烧的各类热能热工设备。 3.1 It is suitable for incinerators that use fuel oil and/or natural gas as the main fuel to incinerate industrial toxic and harmful organic waste water and waste gas. It is also suitable for different types of liquid fuels and/or gas fuels with different Wobbe numbers All kinds of thermal energy thermal equipment for mixed combustion.
3.2 系列产品主燃料输出功率范围为260kw～90000kw。主燃料的实际输出功率可随废气、废水的低位热值和输入量的变化进行联动调节。 3.2 The main fuel output power of the series products ranges from 260kw to 90000kw. The actual output power of the main fuel can be adjusted in conjunction with the change of the low calorific value of waste gas and waste water and the input amount.
3.3 可实现燃烧器和焚烧炉的自动控制和自动调节运行。 3.3 It can realize the automatic control and automatic adjustment operation of the burner and incinerator.
3.4 通过稳焰器的位置调节，保证了燃烧器的点火可靠性和燃烧稳定性。 3.4 By adjusting the position of the flame stabilizer, the ignition reliability and combustion stability of the burner are guaranteed.
3.5 废气、废水从主火焰根部混入，可有效保证有害、有毒成分的分解和燃烧。 3.5 Waste gas and waste water are mixed in from the root of the main flame, which can effectively ensure the decomposition and combustion of harmful and toxic components.
3.6 焚烧炉正常运行时，，烟气中O2≤5.0%,CO≤0. 010%，NOx≤100mg/m3,粉尘≤50mg/m3，黑度不大于林格曼1级，达到了GB/T13271-2001《锅炉大气污染物排放标准》的规定。 3.6 When the incinerator is in normal operation, O2≤5.0%, CO≤0.010% in the flue gas, NOx≤100mg/m3, dust≤50mg/m3, and the blackness is not greater than Ringelmann level 1, reaching GB/T13271 -2001 "Boiler Air Pollutant Emission Standards" regulations.
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| CN103727536B (en) * | 2013-12-05 | 2015-11-11 | 西安西热锅炉环保工程有限公司 | The multistage adjustable strong and weak rotation flow impact gas burner of ultralow nitrogen |
| CN109724093B (en) * | 2017-10-30 | 2020-03-17 | 北京航化节能环保技术有限公司 | Burner and combustion method for treating high-water-content low-calorific-value organic wastewater |
| CN108916875B (en) * | 2018-09-12 | 2024-02-20 | 南京博纳能源环保科技有限公司 | A low-nitrogen mixed combustion burner |
| CN110553267B (en) * | 2019-08-29 | 2024-07-26 | 东方电气集团东方锅炉股份有限公司 | Multi-fuel low-nitrogen combustor |
| CN111380045B (en) * | 2020-04-17 | 2025-03-07 | 上海豪夫麦特燃烧设备有限公司 | Gas turbine high temperature tail gas combustion device |
| CN116557854A (en) * | 2023-05-15 | 2023-08-08 | 中船九江锅炉有限公司 | An ultra-low oxygen fuel burner that can be used in flue gas mode inert gas generator |
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| DE3520781A1 (en) * | 1985-06-10 | 1986-12-11 | Stubinen Utveckling AB, Stockholm | METHOD AND DEVICE FOR BURNING LIQUID AND / OR SOLID FUELS IN POWDERED FORM |
| US6027330A (en) * | 1996-12-06 | 2000-02-22 | Coen Company, Inc. | Low NOx fuel gas burner |
| US6176087B1 (en) * | 1997-12-15 | 2001-01-23 | United Technologies Corporation | Bluff body premixing fuel injector and method for premixing fuel and air |
| JP2001280604A (en) * | 2000-03-31 | 2001-10-10 | Osaka Gas Co Ltd | Combination oil and gas burner and exhaust gas treating device using the same |
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