CN109442398B - Multipoint direct-injection bisection fast-mixing radial-injection low-nitrogen combustor - Google Patents
Multipoint direct-injection bisection fast-mixing radial-injection low-nitrogen combustor Download PDFInfo
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- 238000002347 injection Methods 0.000 title claims abstract description 69
- 239000007924 injection Substances 0.000 title claims abstract description 69
- 238000002156 mixing Methods 0.000 title claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 17
- 239000000446 fuel Substances 0.000 claims abstract description 105
- 239000007789 gas Substances 0.000 claims abstract description 52
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003546 flue gas Substances 0.000 claims abstract description 17
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 13
- 238000009826 distribution Methods 0.000 claims abstract description 12
- 238000002485 combustion reaction Methods 0.000 claims description 21
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 27
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 239000000809 air pollutant Substances 0.000 description 2
- 231100001243 air pollutant Toxicity 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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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
- F23D14/46—Details, e.g. noise reduction means
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Abstract
Description
技术领域technical field
本发明涉及燃烧器的技术领域,特别涉及一种多点直喷对切快混径向喷射低氮燃烧器,其为使用气态燃料的燃烧器,适用于使用气态燃料的工业炉或者燃气锅炉,其能够使燃烧当量比分布更均匀,烟气内循环,降低氮氧化物的排放。The invention relates to the technical field of burners, in particular to a multi-point direct-injection, split-cut, fast-mixing, radial-injection low-nitrogen burner, which is a burner using gaseous fuel and is suitable for industrial furnaces or gas-fired boilers using gaseous fuel, It can make the combustion equivalence ratio distribution more uniform, the flue gas is circulated inside, and the emission of nitrogen oxides can be reduced.
背景技术Background technique
目前首都北京受雾霾的影响一年比一年严重,前期对北京的燃煤锅炉进行全面的改造,以气代煤,从能源上削减污染物的排放,达到治理大气污染的的作用。燃气锅炉低氮改造,为的是减少空气中的氮氧化物气体以及水蒸气,也是北京市清洁空气行动计划中的重点工程任务。目前北京市的燃气锅炉以小型锅炉为主,10蒸吨以下约占88%,容量占比约为47%,北京市燃气锅炉产生的氮氧化物平均值约为146毫克/立方米。At present, Beijing, the capital city, is increasingly affected by smog year by year. In the early stage, the coal-fired boilers in Beijing were comprehensively renovated, replacing coal with gas, reducing the emission of pollutants from energy, and achieving the effect of controlling air pollution. The low-nitrogen transformation of gas-fired boilers is to reduce nitrogen oxides and water vapor in the air, and it is also a key project task in the Beijing Clean Air Action Plan. At present, the gas boilers in Beijing are mainly small boilers, accounting for about 88% under 10 steam tons, and the capacity accounts for about 47%. The average value of nitrogen oxides produced by gas boilers in Beijing is about 146 mg/m3.
2015年6月10日,北京市环保局发布大气污染物排放地方标准,其中《锅炉大气污染物排放标准》修订实施的主要目的即为严控氮氧化物排放。2016年7月1日起,标准中第一阶段的排放限值将开始施行,即新建锅炉排放限值由现行的150毫克/立方米收严到80毫克/立方米。2017年4月1日起,新建锅炉将实施第二阶段排放限值,即氮氧化物进一步收严到30毫克/立方米。On June 10, 2015, the Beijing Municipal Environmental Protection Bureau issued local standards for the emission of air pollutants. The main purpose of the revision and implementation of the "Boiler Air Pollutant Emission Standard" is to strictly control the emission of nitrogen oxides. From July 1, 2016, the emission limit of the first stage in the standard will be implemented, that is, the emission limit of newly built boilers will be tightened from the current 150 mg/m3 to 80 mg/m3. From April 1, 2017, new boilers will implement the second-stage emission limit, that is, nitrogen oxides will be further tightened to 30 mg/m3.
针对低氮的要求,各单位提出了不同燃气锅炉定制专门的改造技术方案,主要包括:更换新型低氮燃烧器,采用空气分级、燃料分级等多种先进技术,控制燃烧速率、扩大还原区域;优化燃烧控制系统,精确调节助燃风与燃料量配比;增加烟气再循环系统,控制燃烧区的含氧量;采用燃料与空气预混方式,控制燃烧区当量比分布。通过以上措施,抑制热力型氮氧化物的生成,从而降低排放。In response to the requirements of low nitrogen, each unit has put forward customized technical solutions for different gas boilers, mainly including: replacing new low-nitrogen burners, adopting advanced technologies such as air grading and fuel grading, controlling the combustion rate and expanding the reduction area; The combustion control system is optimized to precisely adjust the ratio of combustion-supporting air and fuel; the flue gas recirculation system is added to control the oxygen content in the combustion zone; the fuel-air premixing method is used to control the distribution of the equivalence ratio in the combustion zone. Through the above measures, the generation of thermal nitrogen oxides is suppressed, thereby reducing emissions.
烟气再循环又分为烟气外循环和烟气内循环。烟气外循环需要再搭建一套烟气外循环系统,目前应用较广泛,但是其增加了电量的消耗以及增加了系统的复杂性。而烟气内循环在实现烟气循环的同时而不增加新的系统,是一个性价比较高的方案。目前烟气内循环也有很多方案,多是在燃烧器头部做一些设计,使进入工业炉或者燃气锅炉内的气流能够回流,产生内循环,或者是从炉膛的角落通过角涡回流实现,内循环的循环量有限,如果要进一步提升内循环的烟气量就需要与炉膛耦合来产生回流。Flue gas recirculation is further divided into external flue gas circulation and internal flue gas circulation. Flue gas external circulation needs to build another set of flue gas external circulation system, which is widely used at present, but it increases the consumption of electricity and the complexity of the system. The flue gas internal circulation is a cost-effective solution while realizing the flue gas circulation without adding a new system. At present, there are many schemes for the internal circulation of flue gas. Most of them are designed on the burner head, so that the airflow entering the industrial furnace or gas boiler can flow back to generate internal circulation, or it can be realized by angular vortex backflow from the corner of the furnace. The circulation volume of the circulation is limited. If the flue gas volume of the inner circulation is to be further increased, it needs to be coupled with the furnace to generate reflux.
贫燃预混燃烧又分为表面燃烧(即金属网全表面预混燃烧)和预混稳焰燃烧两种方式。目前表面预混燃烧方案较为成熟,但是存在金属网堵塞造成锅炉爆炸的风险;预混稳焰燃烧,存在的问题主要是点火过程的爆轰和燃烧过程的震荡,这都是预混燃烧面临的问题和挑战。Lean-burn premixed combustion is further divided into surface combustion (ie full-surface premixed combustion of metal mesh) and premixed flame stabilization combustion. At present, the surface premixed combustion scheme is relatively mature, but there is a risk of boiler explosion caused by metal mesh clogging; premixed flame stabilization combustion, the main problems are detonation in the ignition process and vibration in the combustion process, which are all faced by premixed combustion. problems and challenges.
综上所述,对于降低工业炉或者燃气锅炉的氮氧化物排放,很多改造技术都会增加很大的建设成本及运行成本,而预混燃烧又会带来无法预测的潜在危险。To sum up, for reducing nitrogen oxide emissions from industrial furnaces or gas-fired boilers, many retrofit technologies will increase construction costs and operating costs, and premixed combustion will bring unpredictable potential dangers.
发明内容SUMMARY OF THE INVENTION
本发明要解决的技术问题是:克服现有技术的不足,提供一种多点直喷对切快混径向喷射低氮燃烧器,通过多点直喷对切快混的方案设计,发挥类比于预混燃烧当量比分布均匀的优势,又避免因预混而带来的回火震荡等问题,而且采用径向喷射方式,通过与炉膛耦合,来产生两类型旋涡,使烟气能够内循环,控制燃烧温度以降低氮氧化物排放。The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a multi-point direct injection tangential fast mixing radial injection low-nitrogen burner, through the multi-point direct injection tangential fast mixing scheme design, the analogy Due to the advantages of uniform distribution of premixed combustion equivalence ratio, it also avoids the problems of tempering and oscillation caused by premixing, and adopts the radial injection method, which is coupled with the furnace to generate two types of vortices, so that the flue gas can be circulated internally. , control combustion temperature to reduce nitrogen oxide emissions.
本发明解决其技术问题所采用的技术方案:一种多点直喷对切快混径向喷射低氮燃烧器,由燃烧器气路主管、燃烧器头部挡板、中心燃料供给管、主路燃料喷射装置、稳火路燃料喷射管构成;燃烧器要伸入工业炉或者燃气锅炉的炉膛内部,保证一定的燃烧器伸入长度;燃烧器头部挡板与燃烧器气路主管末端通过间隔窄段焊接上;点火电极固定在点火路燃料管上,整体插入到燃烧器内的中心燃料供给管附近,保证点火电极能够工作;首先从燃烧器气路主管进口通入空气,接着给点火路燃料管单独供给气态燃料,点火电极工作;当点火路燃料管出口形成一股点火用高温燃气后,给中心燃料供给管通入气态燃料;燃烧器气路主管末端与燃烧器头部挡板之间形成径向开口的缝槽,空气经由主路燃料喷射装置两侧顺径向缝槽加速流出,气态燃料经燃料喷射装置的两侧小孔横向喷入加速的空气流中,燃料喷射装置两侧气流交汇剪切,加快空气与燃料的掺混,混合气经径向缝槽喷射至炉膛;混合气气流与炉膛碰撞后,分成两股,一股偏转向下游,形成一个主流旋涡,另外一股沿炉膛壁面偏转向上游,形成一个上游旋涡;混合气气流在炉膛壁面附近形成低速区,被之前点火路产生的高温燃气点燃并稳火,此时关闭点火路燃料管的气态燃料;燃料多点直喷,燃烧当量比分布均匀,减少了高温释热区域,此外,火焰冲击炉膛壁面,加速换热,使燃烧温度降低,而且上游旋涡流动的存在,形成了烟气内循环。The technical scheme adopted by the present invention to solve the technical problem is as follows: a multi-point direct-injection, fast-mixing, radial-injection low-nitrogen burner, which consists of a burner gas passage main pipe, a burner head baffle, a central fuel supply pipe, and a main burner. Road fuel injection device and fire-stabilizing road fuel injection pipe; the burner should be inserted into the furnace of the industrial furnace or gas boiler to ensure a certain length of the burner; the head baffle of the burner and the end of the main gas line of the burner pass through Weld on the narrow interval; the ignition electrode is fixed on the fuel pipe of the ignition circuit, and is inserted into the vicinity of the central fuel supply pipe in the burner as a whole to ensure that the ignition electrode can work; first, air is introduced from the main inlet of the gas circuit of the burner, and then ignited The gaseous fuel is supplied to the fuel pipe separately, and the ignition electrode works; when a high-temperature gas for ignition is formed at the outlet of the fuel pipe of the ignition circuit, the gaseous fuel is fed into the central fuel supply pipe; the end of the main gas pipe of the burner and the baffle of the burner head A radially open slot is formed between the two sides of the main road fuel injection device. The air is accelerated and flowed out through the radial slot on both sides of the main road fuel injection device. The gaseous fuel is injected laterally into the accelerated air flow through the small holes on both sides of the fuel injection device. The air flow on both sides intersects and shears to speed up the mixing of air and fuel, and the mixed gas is sprayed into the furnace through radial slots; after the mixed air collides with the furnace, it is divided into two parts, one is deflected downstream, forming a mainstream vortex, and the other A stream deflects upstream along the wall of the furnace to form an upstream vortex; the mixed gas flow forms a low-speed zone near the wall of the furnace, which is ignited and stabilized by the high-temperature gas generated by the previous ignition circuit, and the gaseous fuel in the fuel pipe of the ignition circuit is closed at this time; fuel; Multi-point direct injection, the combustion equivalence ratio is evenly distributed, which reduces the high temperature heat release area. In addition, the flame impinges on the wall of the furnace to accelerate heat exchange and reduce the combustion temperature, and the existence of the upstream vortex flow forms the internal circulation of the flue gas.
所述燃烧器伸入长度与燃烧器气路主管的外环直径的比例为1~2;燃烧器气路主管外环直径与炉膛的中间直径即炉膛中径的比例为0.15~0.5。The ratio of the length of the burner extending to the diameter of the outer ring of the main gas passage of the burner is 1 to 2;
所述燃烧器气路主管末端与燃烧器头部挡板之间形成径向开口的缝槽宽度与燃烧器气路主管外环直径的比例为0.1~0.2。The ratio of the width of the slot forming the radial opening between the end of the main gas passage of the burner and the baffle of the burner head to the diameter of the outer ring of the main main pipe of the gas passage of the burner is 0.1-0.2.
所述主路燃料喷射装置由集气箱段与导流锥段构成,其中喷射孔分布在导流锥段的两侧,分别为燃料多点喷射前布孔和燃料多点喷射后布孔,两排孔周向错排,每排孔个数为25-50。The main road fuel injection device is composed of a collecting box section and a diversion cone section, wherein the injection holes are distributed on both sides of the diversion cone section, and are respectively the distribution holes before the multi-point injection of fuel and the distribution holes after the multi-point injection of fuel. The two rows of holes are circumferentially staggered, and the number of holes in each row is 25-50.
所述中心燃料供给管的内环直径与燃烧器气路主管的外环直径的比例为0.2~0.4。中心燃料供给管通过多根燃料支管与主路燃料喷射装置的集气箱段相连,燃料支管的个数为6-10,燃料支管的直径与中心燃料供给管的内环直径的比例为0.2-0.4。The ratio of the diameter of the inner ring of the central fuel supply pipe to the diameter of the outer ring of the main pipe of the gas passage of the burner is 0.2-0.4. The central fuel supply pipe is connected to the collecting tank section of the main fuel injection device through a plurality of fuel branch pipes, the number of fuel branch pipes is 6-10, and the ratio of the diameter of the fuel branch pipe to the inner ring diameter of the central fuel supply pipe is 0.2- 0.4.
所述稳火路燃料喷射管的直径与燃料支管直径相同。稳火路燃料喷射管穿过燃烧器头部挡板中心。The diameter of the fire-stabilizing fuel injection pipe is the same as the diameter of the fuel branch pipe. The fire-stabilizing fuel injection pipe passes through the center of the burner head baffle.
本发明的工作原理:首先从燃烧器气路主管进口通入空气,接着给点火路燃料管单独供给气态燃料,点火电极工作;当点火路燃料管出口形成一股点火用高温燃气后,中心燃料供给管通入气态燃料;空气经由主路燃料喷射装置两侧顺径向缝槽加速流出,气态燃料经燃料喷射装置的两侧小孔横向喷入加速的空气流中,燃料喷射装置两侧气流交汇剪切,加快空气与燃料的掺混,混合气经径向缝槽喷射至炉膛;混合气气流与炉膛碰撞后,分成两股,一股偏转向下游,形成一个主流旋涡,另外一股沿炉膛壁面偏转向上游,形成一个上游旋涡;混合气气流在炉膛壁面附近形成低速区,被之前点火路产生的高温燃气点燃并稳火,此时关闭点火路燃料管的气态燃料。The working principle of the invention is as follows: firstly, air is introduced from the main inlet of the gas circuit of the burner, and then gaseous fuel is separately supplied to the fuel pipe of the ignition circuit, and the ignition electrode works; when the outlet of the fuel pipe of the ignition circuit forms a high-temperature gas for ignition, the central fuel The gaseous fuel is fed into the supply pipe; the air is accelerated and flowed out through the radial slots on both sides of the main fuel injection device, the gaseous fuel is injected laterally into the accelerated air flow through the small holes on both sides of the fuel injection device, and the air flow on both sides of the fuel injection device The intersecting shear speeds up the mixing of air and fuel, and the mixed gas is injected into the furnace through radial slots; after the mixed gas flow collides with the furnace, it is divided into two parts, one is deflected downstream to form a mainstream vortex, and the other is along the The wall of the furnace is deflected to the upstream, forming an upstream vortex; the mixed gas flow forms a low-speed area near the wall of the furnace, which is ignited and stabilized by the high-temperature gas generated by the previous ignition circuit, and the gaseous fuel in the fuel pipe of the ignition circuit is closed at this time.
本发明与现有技术相比具有的优点如下:The advantages that the present invention has compared with the prior art are as follows:
(1)本发明的低氮燃烧器,采用多点直喷对切快混的掺混模式,实现燃料与空气的快速掺混,使当量比分布更均匀,降低释热集中;(1) The low-nitrogen burner of the present invention adopts the blending mode of multi-point direct injection and fast mixing to realize the rapid blending of fuel and air, so that the equivalence ratio distribution is more uniform, and the heat release concentration is reduced;
(2)本发明的低氮燃烧器,采用径向喷射组织稳火,燃烧器与炉膛耦合来产生旋涡,实现烟气内循环,可以增大烟气的循环量;(2) The low-nitrogen burner of the present invention adopts radial injection to stabilize the fire, and the burner is coupled with the furnace to generate a vortex, so that the internal circulation of the flue gas can be realized, and the circulation amount of the flue gas can be increased;
(3)本发明的低氮燃烧器,结构简单,易于加工,成本低。(3) The low-nitrogen burner of the present invention has simple structure, easy processing and low cost.
附图说明Description of drawings
图1为本发明的系统结构示意图;Fig. 1 is the system structure schematic diagram of the present invention;
图2为本发明的燃烧器头部内部结构示意图;2 is a schematic diagram of the internal structure of the burner head of the present invention;
图3为本发明的燃烧器头部外部结构示意图;3 is a schematic diagram of the external structure of the burner head of the present invention;
图4为本发明的燃烧器燃料喷射装置结构示意图。FIG. 4 is a schematic structural diagram of the burner fuel injection device of the present invention.
图中:1为燃烧器气路主管,2为燃烧器头部挡板,3为中心燃料供给管,4为主路燃料喷射装置,5为稳火路燃料喷射管,6为炉膛,7为燃烧器深入长度,8为间隔窄段,9为点火电极,10为点火路燃料管,11为缝槽,12为缝槽宽度,13为主流漩涡,14为上游漩涡,15为燃烧器气路主管外环直径,16为炉膛中径,17为集气箱段,18为导流锥段,19为燃料多点喷射前布孔,20为燃料多点喷射后布孔,21为中心燃料供给管内环直径,22为燃料支管,23为燃料支管直径。In the figure: 1 is the main gas circuit of the burner, 2 is the baffle of the burner head, 3 is the central fuel supply pipe, 4 is the main circuit fuel injection device, 5 is the fuel injection pipe of the fire stabilization path, 6 is the furnace chamber, and 7 is the main circuit fuel injection device. Burner depth, 8 is the narrow interval, 9 is the ignition electrode, 10 is the ignition circuit fuel pipe, 11 is the slot, 12 is the width of the slot, 13 is the mainstream vortex, 14 is the upstream vortex, and 15 is the burner gas path The diameter of the outer ring of the main pipe, 16 is the middle diameter of the furnace, 17 is the gas collecting box section, 18 is the guide cone section, 19 is the distribution hole before the multi-point injection of fuel, 20 is the distribution hole after the multi-point injection of fuel, and 21 is the central fuel supply The diameter of the inner ring of the pipe, 22 is the fuel branch pipe, and 23 is the diameter of the fuel branch pipe.
具体实施方式Detailed ways
下面结合附图以及具体实施方式进一步说明本发明。The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
如图1所示,本发明实施例主要由燃烧器气路主管1、燃烧器头部挡板2、中心燃料供给管3、主路燃料喷射装置4构成;燃烧器要伸入工业炉或者燃气锅炉的炉膛6内部,保证一定的燃烧器伸入长度7;As shown in FIG. 1 , the embodiment of the present invention is mainly composed of a burner gas passage main pipe 1, a
如图2所示,点火电极9固定在点火路燃料管10上,整体插入到燃烧器内的中心燃料供给管3附近,保证点火电极9能够工作;燃烧器气路主管1末端与燃烧器头部挡板2之间形成径向开口的缝槽11,缝槽宽度12与燃烧器气路主管外环直径15,有一定的比例范围,保证气流加速径向喷射到炉膛6壁面,以形成上游旋涡14与主流旋涡13;As shown in FIG. 2 , the ignition electrode 9 is fixed on the ignition
如图3所示,燃烧器头部挡板2与燃烧器气路主管1末端通过多个间隔窄段8焊接上;稳火路燃料喷射管5穿过燃烧器头部挡板2中心;As shown in FIG. 3 , the
如图4所示,主路燃料喷射装置4由集气箱段17与导流锥段18构成,其中喷射孔分布在导流锥段18的两侧,分别为燃料多点喷射前布孔19和燃料多点喷射后布孔20,两排孔周向错排,每排孔的个数有要求,以保证周向均匀性。As shown in FIG. 4 , the main circuit fuel injection device 4 is composed of a
本发明未详细阐述部分属于本领域公知技术。The parts of the present invention that are not described in detail belong to the well-known technology in the art.
以上所述,仅为本发明部分具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本领域的人员在本发明揭露的技术范围内,可轻易想到的变化或替换,都应涵盖在本发明的保护范围之内。The above description is only a part of the specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person familiar with the art within the technical scope disclosed by the present invention can easily think of changes or substitutions. Included within the scope of protection of the present invention.
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CN111780107B (en) * | 2020-07-07 | 2021-11-09 | 中国科学院过程工程研究所 | Gas decoupling combustor and using method thereof |
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JP2000074329A (en) * | 1998-08-27 | 2000-03-14 | Ishikawajima Harima Heavy Ind Co Ltd | Low NOx burner with exhaust gas self-recirculation system |
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