CN100394107C - Smoke-controllable self-circulating type burner with low pollution - Google Patents

Smoke-controllable self-circulating type burner with low pollution Download PDF

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CN100394107C
CN100394107C CN 200610042769 CN200610042769A CN100394107C CN 100394107 C CN100394107 C CN 100394107C CN 200610042769 CN200610042769 CN 200610042769 CN 200610042769 A CN200610042769 A CN 200610042769A CN 100394107 C CN100394107 C CN 100394107C
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combustion chamber
nozzle
inlet
premixing
secondary air
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CN 200610042769
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CN1865774A (en )
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周屈兰
徐通模
惠世恩
田成文
范庆伟
陈 董
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西安交通大学
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一种可控烟气自身再循环量型低污染燃烧器,包括燃烧室和燃料进口,燃料进口通过预混喷嘴固定段和预混喷嘴调节段与燃烧室相连通,预混喷嘴调节段通过活塞式挡板与燃烧室相连接,在燃烧室内位于预混喷嘴调节段的出口处设置有二次空气配风器,该二次空气配风器上开设有与其内腔相连通的二次风进口,所说的燃烧室为双层套筒结构,该双层套筒构成了空腔,在燃烧室的外筒体及内筒体上分别开设有与此空腔相连通的进风口和三次风进口,预混喷嘴固定段的入口处设置有漩流叶片及与空腔相连通的一次风进口。 Flue gas recirculation amount itself a controlled low-pollution type burner comprising a combustion chamber and a fuel inlet, a fuel inlet in communication with the combustion chamber through the premixing nozzle adjustment segment and a fixed segment premixing nozzle, premixing nozzle adjustment section by a piston baffle is connected to the combustion chamber, the combustion chamber is located at the outlet section of the nozzle adjustment premixing secondary air is provided with a wind deflector, with its lumen defines a wind deflector with the secondary air through the secondary air inlet connected He said combustion chamber is a double-sleeve structure, which constitutes a double sleeve cavity defines a cavity communicating with this inlet and tertiary air in the combustion chamber outer cylinder and inner cylinder, respectively, inlet, the inlet of the fixed section premix nozzle is provided with a swirl blade and the air inlet chamber communicating. 本发明采用的结构满足了变成份、变组份燃料燃烧时稳定、快速、高效、低污染所需的条件,具有燃料适应性广、燃烧效率高且加工制造方便的特点。 Structure employed in the present invention satisfies into parts, components becomes stable fuel combustion, fast, efficient, low-pollution conditions required, having a fuel adaptability, high combustion efficiency and convenient manufacturing characteristics.

Description

可控烟气自身再循环量型低污染燃烧器 Flue gas recirculation amount itself controlled low-pollution type burner

技术领域 FIELD

本发明属于热能与动力工程技术领域的燃烧器,具体涉及一种可控烟气自身再循环量型低污染燃烧器。 The present invention pertains to a burner heat power engineering and technology, particularly relates to a controlled low-pollution type flue gas recirculation amount itself burner. 背录技术 Back record technology

国内外现有的多联产模式均是以单一煤气化为气头,通过CO变换反应 Domestic and conventional modes are based on a single multi-generation gas into the gas head, through the CO shift reaction

调整粗煤气中的碳氢比以满足合成部分的需要,这不仅增加了系统和技术的 The crude gas adjusted to meet the needs of specific hydrocarbon synthesis portion, which not only increases the system and technique

复杂性,导致了能量的损耗,而且增加了ca排放。 Complexity, resulting in a loss of energy, and increased ca emissions. 另外我国焦炭的生产量、 In addition China's coke production volume,

消费量、出口量均居世界第一位,按全国年产2亿吨焦炭计算,除用于回炉燃烧和少量发电外,尚有近290亿n^的焦炉煤气未得到利用而被排放掉,相当于耗资1200亿元的西气东输一期工程120亿mV年送气量的2. 4倍。 Consumption, export volume ranking first in the world, according to an annual output of 200 million tons of coke to calculate the country, except for a small amount of recycled combustion and power generation, but there are nearly 29 billion n ^ of coke oven gas is not utilized drained , the equivalent of a West-East project will cost 120 billion yuan of 12 billion mV 2. 4 times the annual delivery of gas. 如此之多的热量排入大气中不仅是资源的极大浪费,也会造成严重的污染问题。 So much heat into the atmosphere is not only a tremendous waste of resources, it can also cause serious pollution problems. 针对以上的各种情况,由太原理工大学的谢克昌院士担任首席科学家的国家 For the above circumstances, XIE Ke-chang by the Academy of Taiyuan University of Technology served as chief scientist of the National

"973"项目"气化煤气与热解煤气共制合成气的多联产应用的基础研究" 建议:将气化煤气富碳、焦炉煤气(热解煤气)富氣的特点相结合,釆用创新的气化煤气与焦炉煤气共重整技术,进一步使气化煤气中的C02和焦炉煤气中的CH^转化成合成气,这样,不仅可以提高原料气的有效成分,调解氢碳比,而且可以免除CO变换反应,实现C02减排,并降低能量损耗。 "973" project "pyrolysis gas and gasification gas to synthesis gas co Polygeneration basic research applications" Proposal: carbon-rich vaporized gas, coke oven gas (pyrolysis gas) gas-rich phase binding characteristics, Bian with innovative gasification gas and coke oven gas were reforming technology, further gasified coal gas and coke oven gas C02 CH ^ converted to synthesis gas, so that not only can increase the effective ingredient of the raw material gas, hydrogen to carbon mediation ratio, and eliminates CO shift reaction, to achieve C02 emissions, and to reduce energy loss.

目前己经得到工业应用和正在工业试验的燃气一蒸汽联合循环发电 At present industrial applications and has been tested under industrial gas steam combined cycle power generation

(IGCC),都是以电力为唯一输出产品的,供给燃气轮机的燃料一般是热值较为稳定,污染物含]t也较低。 (The IGCC), are to output power as the only product, the gas turbine fuel supply heating value is typically more stable, containing pollutants] t low. 但是对于多联产系统,电力并非唯—的产品, But for multi-generation systems, electric power is not the only - products,

原料气铕要用于制备其它化学品,而用于发电的是化工过程弛放气和剩余粗 Europium raw material gas to be used for the preparation of other chemicals, and for power generation is a chemical process and purge gas remaining crude

煤气。 gas. 因此在多联产系统中燃气发电会存在以下问题:(1)弛放气及粗煤气的成分随系统的运行状况变化,因而热值不稳定,其它相关的物理、化学特性也会变化;(2)弛放气及粗煤气的压力、温度、流量等参数会随系统的运行状况变化,导致最终进入燃气轮机的燃料配比也会发生变化。 Thus there is a multi-generation gas turbine power system will be the following problems: the component (a) purge gas and raw gas with the operating conditions of the system changes, and thus the value of heat labile, other relevant physical and chemical properties will change; ( 2) pressure of purge gas and raw gas, the temperature, flow and other parameters will vary with operating conditions of the system, resulting in a final proportion of fuel entering the gas turbine will change.

因此,为了保证系统中燃气一蒸汽联合循环发电系统稳定地输出电力产品,首先需要根据运行情况调配进入燃气轮机燃料的总热值。 Accordingly, in order to ensure a system of gas turbine combined cycle power generation system power output stably products, first need to deploy into the gross calorific value of the fuel according to the operation of the gas turbine. 此外,由于系统弛放气和粗煤气的成分和参数也是变化的,在总热值达到要求的情况下, 还必须保证燃料气能够稳定、充分、低污染燃烧,这样才能保证燃气轮机的稳定正常运行。 Further, since the system purge gas and raw gas composition and parameters are changed, in a case where the total heating value to meet the requirements, must also ensure that the fuel gas can be stably, sufficiently, low emission combustion, so as to ensure the normal operation of the gas turbine stable . 因此,在利用多联产弛放气及粗煤气发电中燃烧的控制就显得尤为重要,是亟待解决的关键科学问题。 Therefore, it is particularly important in the use of multi-generation purge gas and raw gas burning power generation control becomes, is the key scientific problems to be solved.

燃烧是一个物理和化学作用综合控制的反应过程。 Combustion reaction is a comprehensive physical and chemical effects control. 气体燃料的主要可燃成分一般为甲烷、氢气、 一氧化碳和各种含炭量很高的垸烃,这些物质-•般能较安全地燃烧而空气中的氮当温度过高时,会生成热力型N0x,造成严重的大气污染,另外,温度过高也会使燃烧装置无法承受。 The main components of the combustible gaseous fuel typically contain high amounts of carbon embankment hydrocarbon is methane, hydrogen, carbon monoxide and a variety of these materials - • can more safely as nitrogen in the air combustion when the temperature is too high, heat generation type N0x, causing serious air pollution, in addition, can not withstand the high temperature can cause the combustion apparatus.

对于多联产中的驰放气和粗煤气来说,在不同的系统运行状况下,产气的热值和成分配比是不一样的,而现有的各种燃烧器,如纯扩散燃烧器、半预混燃烧器、完全预混燃烧器等,由于其配风方式或配风元件(旋流叶片、 钝体、烟气再循环、直接喷射式)在设计时已经固定,当在燃料组份、成分变化时,不能较好控制燃烧温度,可能出现不完全燃烧、熄火、局部高温、 暴燃、超温等恶劣的工作情况。 For the co-production of purge gas and raw gas, in the system under different operating conditions, gas heating value and the composition ratio is not the same, and a variety of conventional burners, such as pure diffusion combustion , semi premix burner, fully premixed burners, because of the air distribution mode or air distribution element (swirl vanes bluff body, flue gas recirculation, direct injection) has been fixed at design time, when the fuel component, when the composition change, not better control of the combustion temperature, incomplete combustion may occur, flame, severe cases of local working temperature, flash fire, overtemperature.

发明内容 SUMMARY

本发明的目的在于克服上述现有技术的缺点,提供了一种适应性广,负 Object of the present invention is to overcome the above disadvantages of the prior art, there is provided a wide adaptability, negative

荷调节范围大,燃烧温度低,污染物排放量少的可控烟气自身再循环量型低污染燃烧器。 Charge adjustment range, low combustion temperature, the discharge of pollutants controllable flue gas recirculation amount itself of low-pollution type burner.

为达到上述目的,本发明采用的技术方案是:包括燃烧室和燃料进口, 其特点是,燃料进口通过预混喷嘴固定段和预混喷嘴调节段与燃烧室相连通,预混喷嘴调节段通过活塞式挡板与燃烧室相连接,在燃烧室内位于预混喷嘴调节段的出口处设置有二次空气配风器,该二次空气配风器上开设有与其内腔相连通的二次风进口,所说的燃烧室为双层套筒结构,该双层套简构成了空腔,在燃烧室的外简体及内筒体上分别开设有与此空腔相连通的进风口和三次风进口,预混喷嘴固定段的入口处设置有漩流叶片及与空腔相连通的一次风进口。 To achieve the above object, the technical solution of the present invention is that: a combustion chamber and including a fuel inlet, characterized in that the fuel inlet communicates with the combustion chamber of the adjustment sections by premixing premixed nozzle segments and the nozzle holder, by premixing nozzle adjustment section the baffle connected with the piston combustion chamber, the combustion chamber is located at the outlet section of the nozzle adjustment premixing secondary air is provided with a wind deflector, it defines a lumen connected thereto through the distribution of the secondary air resister secondary air inlet, said combustion chamber is a double-sleeve structure, which constitutes a double set of degenerate cavity defines a cavity communicating with this inlet and tertiary air in the combustion chamber outside the inner cylinder and simplified respectively inlet, the inlet of the fixed section premix nozzle is provided with a swirl blade and the air inlet chamber communicating.

本发明的二次空气配风器的内腔为一先渐縮再渐扩的锥形结构;预混喷 The lumen of the secondary air with the wind deflector of the present invention is a first tapered and then diverging conical configuration; premix discharge

嘴调节段的出口喷嘴为一锥形结构,且在喷嘴内还设置有稳焰管。 Adjusting the nozzle outlet nozzle segment is a tapered configuration, and the nozzle is also provided in the flame tube.

本发明通过预混燃气喷嘴的变化,在燃烧室中控制烟气的再循环量,从而实现变成分、变组份燃料气的点火与燃烧,具有燃料适应性广、燃烧效率高且加工制造方便且燃烧稳定、快速、高效、低污染的特点。 The present invention is by varying the premix gas burner, control the amount of recirculated flue gas in the combustion chamber, thereby achieving into points, ignition and combustion of the fuel gas group becomes part of, the fuel has a wide adaptability, high combustion efficiency and manufacturing convenient and stable combustion, fast, efficient, low pollution features. 附图说明 BRIEF DESCRIPTION

附图是本发明的整体结构示意图。 The drawings are schematic overall structure of the present invention.

具体实施方式 Detailed ways

下面结合附图对本发明的结构原理和工作原理作进一步详细说明。 BRIEF structure and working principle of the principles of the present invention are described in further detail below in conjunction.

参见附图,本发明包括燃烧室13,燃料进口1通过预混喷嘴固定段3 和预混喷嘴调节段4与燃烧室13相连通,预混喷嘴固定段3和预混喷嘴调节段4通过连接环7相连接,预混喷嘴调节段4通过活塞式挡板8与燃烧室13相连接,预混喷嘴调节段4的出口喷嘴14为一锥形结构,且在喷嘴14 Referring to the drawings, the present invention comprises a combustion chamber 13, a fuel inlet adjustment section 13 communicates with the combustion chamber 4 through the premixing nozzle and premix nozzle fixing section 3, section 3 is fixed premixing nozzles and premixing nozzle adjustment section 4 through the connection ring 7 is connected to section 4 by premixing nozzle adjustment piston 8 is connected to the combustion chamber baffles 13, outlet nozzle premix nozzle adjustment section 4 has a conical shape structure 14, and the nozzle 14

内还设置有稳焰管5,在燃烧室13内位于预混喷嘴调节段4的出口处设置有二次空气配风器9,该二次空气配风器9上开设有与其内腔相连通的二次风进口10, 二次空气配风器9的内腔为一先渐縮再渐扩的锥形结构,所说的燃烧室13为双层套筒结构,该双层套筒构成了空腔15,在燃烧室13的外筒体及内筒体上分别开设有与此空腔15相连通的进风口12和三次风进口11,预混喷嘴固定段3的入口处设置有漩流叶片2及与空腔15相连通的一次风进□ 6。 There is also provided with a flame-pipe 5, located at the outlet of the premix nozzle adjustment section 4 is provided with a wind deflector 9 a secondary air in the combustion chamber 13, defines a lumen connected thereto through 9 with the secondary air resister the secondary air inlet 10, air delivery lumen secondary air 9 to constitute a first tapered divergent conical configuration and then said combustion chamber is double sleeve structure 13, the bilayer sleeve cavity 15 in the outer cylinder and the inner cylinder defines a combustion chamber 13 of each cavity 15 communicates with this air inlet 12 and the tertiary air inlet 11, the inlet of the nozzle premixing section 3 is provided with a fixed swirler 2 with the cavity and the blade 15 into the primary air communicating □ 6.

本发明的工作过程如下:燃料气由燃料进口l供入预混喷嘴固定段3和预混喷嘴调节段室4中,与一次空气进口6中的一次空气预先混合均匀,一次空气在混合前先经过漩流叶片2产生旋转。 Operation of the present invention is as follows: from the fuel gas supplied into the fuel inlet l premixing nozzle holder portion 3 and premix nozzle adjustment section chamber 4, 6 and the primary air in the primary air inlet pre-mixed, before the first mixing primary air after 2 generates a rotational swirl vane. 预混均匀的气体混合物由预混喷嘴调节段4的锥形喷嘴14喷入燃烧室,气流速度较高,在喷嘴14出口处形成一个低压区(相对于二次空气配风器后部的燃烧室部分),烟气由二次空气配风器9与燃烧室13之间预留的环形空隙回流到喷嘴出口处,点燃新鲜的预混燃料气,着火后的燃料在二次空气配风器9中经二次风进口10进入的二次空气混合,降低燃烧反应的温度,并在后部燃烧室中完成全部化学反应并进一步与经三次风进口11三次空气混合。 Homogeneous premixed gas mixture is adjusted by the tapered nozzle section premix nozzle 4 into the combustion chamber 14, a high flow velocity, a low pressure region is formed at the outlet of the nozzle 14 (with respect to the rear portion of the secondary air with combustion air is chamber portion), with the flue gas by the secondary air resister 9 and 13 reserved between the annular space back into the combustion chamber at the nozzle exit, fresh premixed fuel gas ignition, after ignition of the fuel with the secondary air resister 9, secondary air via secondary air inlet 10 into the mixing, the lower the temperature of the combustion reaction, and the completion of all chemical reactions in the rear combustion chamber 11 and the tertiary air by mixing with the tertiary air inlet further. 燃烧所需要的一、三次空气由进风口12供入,二次空气由二次风进口IO供入,四股进气量可单独控制,以达到最好的燃烧效果。 A desired combustion, the tertiary air inlet 12 is fed by the secondary air into the secondary air inlet of the IO, the intake air amount four strands can be controlled separately, in order to achieve the best combustion efficiency.

当燃料气成份、组分变化时,通过改变预混喷嘴调节段4的位置,即调节活塞式挡板8与二次空气配风器9之间的环缝隙随之改变,再循环烟气回流的阻力相应改变,再循环烟气量也发生变化,从而达到调节再循环烟气量的目的。 When the fuel gas composition, composition changes, the position adjusting section 4 by changing the premixing nozzle, i.e. adjustable piston ring gap between the baffle 8 and 9 the secondary air with a wind deflector will change, recirculated flue gas reflux the corresponding change in resistance, the amount of recirculated flue gas also changes, so as to achieve the purpose of adjusting the amount of recirculated flue gas.

采用本发明燃料适应性广,对变成分、变组份燃料有良好的适应性;采 The fuel of the present invention using the wide adaptability of changing composition, the fuel component becomes good adaptability group; Mining

用预混燃烧方式,预混燃烧方式使燃料气在偏离化学当量比的条件着火、燃烧,可以降低N0x生成量;负荷调节范围较大,采取可控烟气自身循环量的方法,强化新鲜燃料的稳定点火、燃烧,从而增加了燃烧器的负荷调节范围: 燃烧温度较低,采用预混燃烧的方式,燃烧温度可以控制到较低的水平,同时二次空气的补给量可控,也可以降低燃烧室的整体温度水平,降低NOx排放量,污染物排放量低NOx排放量少,适应环保要求。 A premixed combustion, premixed combustion of the fuel gas in the stoichiometric conditions departing from ignition, combustion, can reduce the production amount N0x; load wide range of adjustment, taken controllable method of flue gas circulation amount itself of the fresh fuel to strengthen stable ignition, combustion, thereby increasing the load of the burner adjustment range: low combustion temperature, use of premixed combustion mode, the combustion temperature can be controlled to a lower level, while the amount of the secondary air supply is controllable, may be reduce the overall temperature level of the combustion chamber, to reduce NOx emissions, low NOx emissions less emissions to meet environmental requirements.

Claims (3)

  1. 1、一种可控烟气自身再循环量型低污染燃烧器,包括燃烧室(13)和燃料进口(1),其特征在于:燃料进口(1)通过预混喷嘴固定段(3)和预混喷嘴调节段(4)与燃烧室(13)相连通,预混喷嘴调节段(4)通过活塞式挡板(8)与燃烧室(13)相连接,在燃烧室(13)内位于预混喷嘴调节段(4)的出口处设置有二次空气配风器(9),该二次空气配风器(9)上开设有与其内腔相连通的二次风进口(10),所说的燃烧室(13)为双层套筒结构,该双层套筒构成了空腔(15),在燃烧室(13)的外筒体及内筒体上分别开设有与此空腔(15)相连通的进风口(12)和三次风进口(11),预混喷嘴固定段(3)的入口处设置有漩流叶片(2)及与空腔(15)相连通的一次风进口(6)。 1, a controlled amount of recirculated flue gas itself pollution type burner comprising a combustion chamber (13) and a fuel inlet (1), characterized in that: a fuel inlet (1) through the fixed section premix nozzle (3) and premixing nozzle adjustment section (4) and the combustion chamber (13) communicating premixing nozzle adjustment section (4) is connected to the combustion chamber (13) by a piston baffle (8), located within the combustion chamber (13) premixing nozzle at the outlet of the controlled system (4) is provided with a secondary air resister (9), defines the secondary air inlet (10) thereto has a lumen communicating with the secondary air resister (9), He said combustion chamber (13) is a double-sleeve structure which forms the bilayer sleeve cavity (15), respectively, is opened in the combustion chamber outer cylinder and the inner cylinder (13) has a cavity with this (15) communicating air inlet (12) and the tertiary air inlet (11), the inlet of the nozzle premixing fastening section (3) is provided with a swirl blade (2) and the cavity (15) communicating the primary air imported (6).
  2. 2、 根据权利要求1所述的可控烟气自身再循环量型低污染燃烧器,其特征在于:所说的二次空气配风器(9)的内腔为一先渐縮再渐扩的锥形结构。 2. The self-controllable flue gas recirculation amount according to a low-pollution type burner as claimed in claim wherein: said secondary air with the lumen of the wind deflector (9) is a first divergent and then tapered the tapered structure.
  3. 3、 根据权利要求1所述的可控烟气自身再循环量型低污染燃烧器,其特征在于:所说的预混喷嘴调节段(4)的出口喷嘴(14)为一锥形结构, 且在喷嘴(14)内还设置有稳焰管(5)。 3. The self-controllable flue gas recirculation amount according to a low-pollution type burner as claimed in claim wherein: said preparatory nozzle adjustment segment (4) of the outlet nozzle (14) is a cone-shaped structure, and within the nozzle (14) is also provided with a flame-pipe (5).
CN 200610042769 2006-04-30 2006-04-30 Smoke-controllable self-circulating type burner with low pollution CN100394107C (en)

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CN102192515A (en) * 2010-03-10 2011-09-21 中国石油天然气股份有限公司 Compulsory mixed tail gas furnace

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CN102679347A (en) * 2011-03-15 2012-09-19 佛山市启迪节能科技有限公司 Emission-reduction premixing type secondary burner
CN102759101A (en) * 2011-04-25 2012-10-31 佛山市启迪节能科技有限公司 Working method and device of pre-mixing type secondary combustor
CN102226522B (en) * 2011-06-01 2013-01-23 中国科学院广州能源研究所 Gas burner
CN102537958B (en) * 2012-02-20 2014-08-13 北京交通大学 Cone rotor type gas burner
EP2821699A1 (en) * 2013-07-02 2015-01-07 Haldor Topsøe A/S Mixing of recycle gas with fuel gas to a burner
CN105299642B (en) * 2015-11-02 2018-05-15 无锡华光锅炉股份有限公司 One kind of gas burner structure
CN107166395A (en) * 2017-05-31 2017-09-15 北京理工大学 Self-circulation low nitrogen oxide swirling burner

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EP1211459A2 (en) 1996-04-09 2002-06-05 Toyota Jidosha Kabushiki Kaisha Combustion apparatus
CN1756925A (en) 2003-03-07 2006-04-05 瑞特克股份有限公司 Gas combustion device

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EP1211459A2 (en) 1996-04-09 2002-06-05 Toyota Jidosha Kabushiki Kaisha Combustion apparatus
CN1756925A (en) 2003-03-07 2006-04-05 瑞特克股份有限公司 Gas combustion device

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CN102192515A (en) * 2010-03-10 2011-09-21 中国石油天然气股份有限公司 Compulsory mixed tail gas furnace
CN102192515B (en) 2010-03-10 2012-11-14 中国石油天然气股份有限公司 Compulsory mixed tail gas furnace

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