CN100422639C - Catalytic combustion control system - Google Patents
Catalytic combustion control system Download PDFInfo
- Publication number
- CN100422639C CN100422639C CNB2006102012418A CN200610201241A CN100422639C CN 100422639 C CN100422639 C CN 100422639C CN B2006102012418 A CNB2006102012418 A CN B2006102012418A CN 200610201241 A CN200610201241 A CN 200610201241A CN 100422639 C CN100422639 C CN 100422639C
- Authority
- CN
- China
- Prior art keywords
- control
- frequency
- combustion
- temperature
- catalytic
- 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
Images
Abstract
一种催化燃烧控制系统,由流体预混控制系统和PLC控制器件两大部分连接组成,流体预混控制系统包括一台串联文丘里混合器的风机,文丘里混合器的喉管吸风口与比例调节阀连接,比例调节阀的进口与零压阀的出口连接,零压阀并联针阀,PLC控制器件包括一个PLC控制器CPU。采用流体控制与PLC自动控制相结合的技术,在一套流体预混系统中,只需通过PLC控制器件控制风机的输入频率来控制风机的输出风量,实现控制催化燃烧过程所需要的不同的燃气-空气混合浓度;可直接在催化燃烧器的催化剂载体上实现自动控制点火、预热有焰燃烧和催化燃烧;简化了催化燃烧器的结构,减小了体积,降低了成本,提高了自动化程度和控制精度。
A catalytic combustion control system, which is composed of a fluid premix control system and a PLC control device. The fluid premix control system includes a fan with a Venturi mixer connected in series, and the throat suction port of the Venturi mixer is proportional to the The regulating valve is connected, the inlet of the proportional regulating valve is connected with the outlet of the zero pressure valve, the zero pressure valve is connected in parallel with the needle valve, and the PLC control device includes a PLC controller CPU. Using the combination of fluid control and PLC automatic control technology, in a fluid premixing system, only need to control the input frequency of the fan through the PLC control device to control the output air volume of the fan, so as to realize the control of different gas required for the catalytic combustion process -Air mixed concentration; automatic control ignition, preheating flame combustion and catalytic combustion can be realized directly on the catalyst carrier of the catalytic burner; the structure of the catalytic burner is simplified, the volume is reduced, the cost is reduced, and the degree of automation is improved and control accuracy.
Description
(一)技术领域 (1) Technical field
本发明涉及燃气催化燃烧器的催化燃烧控制系统和方法。The invention relates to a catalytic combustion control system and method of a gas catalytic burner.
(二)背景技术 (2) Background technology
人类的生存和发展依赖着能源的开发和利用,但由能源开发和利用带来的环境污染等负面影响,也日益威胁着人类的生存和社会的可持续发展。如由矿物燃料普通燃烧产生的排放物SO2、NOx、CO2、CO和未完全燃烧的碳氢化合物UHC,造成酸雨、光化学烟雾和温室效应,对生态造成严重破坏并威胁着人类健康。要解决由于燃烧造成的环境污染问题,必须改变传统落后的燃烧方式,提高燃烧效率,开发研制新的燃烧器和燃烧控制技术,对燃烧污染进行综合防治。The survival and development of human beings depend on the development and utilization of energy, but the negative effects such as environmental pollution brought about by the development and utilization of energy are increasingly threatening the survival of human beings and the sustainable development of society. For example, the emissions of SO 2 , NOx, CO 2 , CO and incompletely burned hydrocarbons UHC produced by common combustion of fossil fuels cause acid rain, photochemical smog and greenhouse effect, causing serious damage to the ecology and threatening human health. To solve the problem of environmental pollution caused by combustion, it is necessary to change the traditional and backward combustion methods, improve combustion efficiency, develop new burners and combustion control technologies, and carry out comprehensive prevention and control of combustion pollution.
催化燃烧能从根本上解决普通燃烧带来的燃烧效率低和污染排放高的新技术,它是借助催化剂,在一定条件下控制燃烧化学反应过程并释放出热量。催化燃烧能降低活化能,加速必要的化学反应,使有害的或不必要的反应降低到最低限度。目前天然气催化燃烧已实现燃烧效率高于99.99%,而烟气排放的有害物NOx、CO、UHC均小于10×10-6,由此可见,催化燃烧能对燃料完全燃烧并对污染物进行有效控制,是非常理想和环境友好的燃烧方式。Catalytic combustion is a new technology that can fundamentally solve the low combustion efficiency and high pollution emissions caused by ordinary combustion. It uses catalysts to control the combustion chemical reaction process and release heat under certain conditions. Catalytic combustion can reduce activation energy, accelerate necessary chemical reactions, and minimize harmful or unnecessary reactions. At present, the catalytic combustion of natural gas has achieved a combustion efficiency higher than 99.99%, and the harmful substances NOx, CO, and UHC emitted by the flue gas are all less than 10×10 -6 , so it can be seen that catalytic combustion can completely burn the fuel and effectively eliminate pollutants. Control is a very ideal and environmentally friendly combustion method.
催化燃烧机理复杂,条件苛刻,必须在一定条件下才能发生反应,其核心技术是催化剂组分、制备工艺和催化燃烧控制技术。以甲烷为主要成分的天然气的催化燃烧,多采用蜂窝陶瓷为载体,在多孔蜂窝载体的壁面上涂一层多孔的活性水洗层,使其形成粗糙多孔的表面以增大催化反应的表面积,选用适合天然气高温催化燃烧的稀土材料和贵金属催化剂常用Pd、Pt及涂层制备工艺,将催化剂负载在蜂窝陶瓷体表面,再将该陶瓷体安装在催化燃烧器上,然后根据催化剂的活性和催化燃烧机理,应用流体和PLC控制技术来控制催化燃烧的全过程。催化燃烧控制技术是控制和完成催化燃烧反应的必要条件之一,它主要包括空气与燃气按所需要的比例均匀混合、点火、预热、催化燃烧温度和安全控制等。The mechanism of catalytic combustion is complex, the conditions are harsh, and the reaction must occur under certain conditions. The core technology is catalyst components, preparation technology and catalytic combustion control technology. For the catalytic combustion of natural gas with methane as the main component, honeycomb ceramics are often used as the carrier, and a porous active water washing layer is coated on the wall of the porous honeycomb carrier to form a rough and porous surface to increase the surface area of the catalytic reaction. Rare earth materials and noble metal catalysts suitable for high-temperature catalytic combustion of natural gas usually use Pd, Pt and coating preparation processes. The catalyst is loaded on the surface of the honeycomb ceramic body, and then the ceramic body is installed on the catalytic burner, and then according to the activity of the catalyst and catalytic combustion Mechanism, application of fluid and PLC control technology to control the whole process of catalytic combustion. Catalytic combustion control technology is one of the necessary conditions to control and complete the catalytic combustion reaction. It mainly includes uniform mixing of air and gas according to the required ratio, ignition, preheating, catalytic combustion temperature and safety control.
天然气催化燃烧为贫燃料、全预混无焰燃烧,空气与天然气混合浓度为5%左右,混合气体通过负载催化剂的蜂窝陶瓷体的温度大于催化剂的起燃温度T1,才能发生催化燃烧反应,在燃气混合浓度一定的情况下,催化燃烧的燃烧功率或温度T正比于混合气体的标准体积流量,而催化燃烧温度的上限必须控制在催化剂的最高限制温度T2以下,因此工业催化燃烧要求有较高的自动化控制程度。文献曾报道的甲烷蜂窝陶瓷催化燃烧器(V.Dopont,F.Moallemi,A.Williamas and S.-H.Zhang,Int.J.Energy Res.2000;24:1181-1201),以及中国专利局所公开的发明专利申请说明书“催化燃烧装置”CN1173919A和“催化燃烧体系”CN1695002A在负载催化剂载体或催化燃烧器前,都需要一个预热燃烧器,或另设一套燃气混合系统提供启动燃料,催化燃烧前,先点燃预热燃烧器,由预热燃烧器加热催化剂,等催化剂的温度达到起燃温度时,再关闭预热燃烧器,然后再向催化燃烧器通贫燃料进行催化燃烧,因为贫燃料在常温条件下无法点燃和燃烧,因此先有的催化燃烧技术不但使催化燃烧器结构复杂、体积庞大,还增加了催化燃烧控制系统成本和技术难度。The catalytic combustion of natural gas is fuel-lean, fully premixed flameless combustion, the mixed concentration of air and natural gas is about 5%, and the temperature of the mixed gas passing through the catalyst-loaded honeycomb ceramic body is greater than the light-off temperature T1 of the catalyst, so that the catalytic combustion reaction can occur. When the gas mixture concentration is constant, the combustion power or temperature T of catalytic combustion is proportional to the standard volume flow rate of the mixed gas, and the upper limit of the catalytic combustion temperature must be controlled below the maximum limit temperature T2 of the catalyst, so the requirements for industrial catalytic combustion are relatively high. degree of automation control. The methane honeycomb ceramic catalytic burner reported in the literature (V.Dopont, F.Moallemi, A.Williamas and S.-H.Zhang, Int.J.Energy Res.2000; 24:1181-1201), and the Chinese Patent Office The disclosed invention patent application specification "catalytic combustion device" CN1173919A and "catalytic combustion system" CN1695002A need a preheating burner before loading the catalyst carrier or catalytic burner, or set up another set of gas mixing system to provide start-up fuel, Before the catalytic combustion, the preheating burner is ignited first, and the catalyst is heated by the preheating burner. When the temperature of the catalyst reaches the light-off temperature, the preheating burner is turned off, and then the lean fuel is passed to the catalytic burner for catalytic combustion, because Lean fuel cannot be ignited and burned at room temperature. Therefore, the existing catalytic combustion technology not only makes the structure of the catalytic burner complex and bulky, but also increases the cost and technical difficulty of the catalytic combustion control system.
(三)发明内容 (3) Contents of the invention
本发明的目的是提供一种催化燃烧控制系统,采用流体控制与PLC自动控制相结合的技术,解决在一套流体预混系统中,只需通过PLC控制器件控制风机的输入频率f来控制风机的输出风量Qa,实现控制催化燃烧过程所需要的不同的燃气-空气混合浓度的问题;解决直接在催化燃烧器的催化剂载体上实现点火、预热有焰燃烧和催化燃烧问题;同时解决催化燃烧过程的吹扫、预热有焰燃烧、催化燃烧和安全自动控制问题,使催化燃烧器的结构得到简化,体积减小,成本降低,控制系统的自动化程度和控制精度得到提高。The purpose of the present invention is to provide a catalytic combustion control system, which adopts the technology of combining fluid control and PLC automatic control to solve the problem that in a set of fluid premixing system, only the input frequency f of the fan needs to be controlled by the PLC control device to control the fan The output air volume Qa can achieve the problem of controlling the different gas-air mixing concentrations required in the catalytic combustion process; solve the problems of ignition, preheating, flaming combustion and catalytic combustion directly on the catalyst carrier of the catalytic burner; solve the problem of catalytic combustion at the same time Process purging, preheating flaming combustion, catalytic combustion and safety automatic control issues simplify the structure of the catalytic burner, reduce the volume, reduce the cost, and improve the degree of automation and control accuracy of the control system.
为了实现上述目的,本发明提出以下技术方案:In order to achieve the above object, the present invention proposes the following technical solutions:
一种催化燃烧控制系统,用于控制催化燃烧器1的燃烧反应,其特征在于:它由流体预混控制系统和PLC控制器件两大部分连接组成;A catalytic combustion control system, used to control the combustion reaction of the
流体预混控制系统包括:一台风机3串联一个文丘里混合器4,用来吹扫催化燃烧器1和利用文丘里混合器4引射燃气并进行均匀预混,文丘里混合器4的出风口与催化燃烧器1的进风口连接,文丘里混合器4的喉管吸风口与一个比例调节阀5连接,用来设定催化燃烧的燃气与空气的预混浓度,比例调节阀5的进口与一个零压阀6的出口连接,用来保证燃气接近常压,零压阀6的进出口两端并联一个针阀7,用来设定点火到预热普通燃烧的最佳燃气与空气的预混浓度;The fluid premixing control system includes: a blower 3 connected in series with a Venturi mixer 4, which is used to purge the
PLC控制器件包括:PLC control devices include:
一个PLC控制器CPU14;A PLC controller CPU14;
一个与PLC控制器CPU14控制信号输出端连接、并用于控制风机3输入频率f的变频器15;A frequency converter 15 connected to the control signal output end of the PLC controller CPU14 and used to control the input frequency f of the blower fan 3;
一个分别连接PLC控制器CPU控制信号输出端和变频器15的输入端的数/模转换模块18;A digital/analog conversion module 18 connected to the output terminal of the control signal of the PLC controller CPU and the input terminal of the frequency converter 15;
一个用于检测催化剂载体的温度、用于控制恒温催化燃烧的温度传感器13;A
一个与温度传感器信号连接、并与PLC控制器CPU信号输入端连接的模/数转换模块17;An analog/digital conversion module 17 connected with the signal of the temperature sensor and connected with the signal input end of the PLC controller CPU;
一个连接于燃气主管20中、用于控制燃气预混开关、并与零压阀6连接的主火电磁阀8;A main fire solenoid valve 8 connected to the gas
一个用于控制点火器11的燃气开关、连接在燃气支管21中的点火电磁阀9:A gas switch for controlling the
一个用于对点火器11放电点火的点火变压器10;An
一个置于点火器附近、用于判断点火器11和催化剂载体2是否被点燃的紫外线探头12;An
一个置于催化剂载体2前方、并与PLC控制器CPU14信号连接的可见光探测器16;A
一个与PLC控制器CPU14信号连接的文本显示器。A text display with a signal connection to the PLC controller CPU14.
上述催化剂载体2是蜂窝陶瓷载体或金属载体,载体上负载着催化剂。The above-mentioned
一种应用上述催化燃烧控制系统的催化燃烧控制方法:由PLC控制器CPU14通过变频器15控制风机3的输入频率,风机3的输入频率与输出的空气流量Qa成正比,当空气通过文丘里混合器4的喷嘴时,在喷嘴周围形成负压引射燃气,被引射的燃气一股通过零压阀6,通过零压阀6的燃气标准流量与引射燃气的空气标准流量成等比关系;另一股燃气通过与零压阀6并联的针阀7,通过针阀7的标准燃气流量基本恒定,两股燃气合并后经过比例调节阀5进入文丘里的混合腔和渐扩段与空气均匀预混,燃气与空气的预混浓度Qg/Qg+Qa与空气通过文丘里喷嘴的雷诺数或流量有关,当雷诺数较小时,燃气与空气的混合浓度较高,随着雷诺数的逐渐增加,燃气与空气的混合浓度会逐渐降低,当雷诺数大于一值后,燃气与空气的混合浓度不再随雷诺数的增加而改变,参见图3和图5,根据本发明流体混合控制的雷诺数与燃气混合浓度的关系和变频器的输出频率与燃气混合浓度Qg/Qg+Qa的关系,通过控制风机3的输入频率,分别控制点火、预热、催化燃烧所需的不同的燃气与空气混合浓度,以及在催化燃烧阶段控制催化燃烧功率或温度。A catalytic combustion control method using the above catalytic combustion control system: the input frequency of the fan 3 is controlled by the PLC controller CPU14 through the frequency converter 15, the input frequency of the fan 3 is proportional to the output air flow Qa, when the air passes through the Venturi mixing When using the nozzle of the device 4, a negative pressure is formed around the nozzle to inject gas, and the injected gas passes through the zero pressure valve 6, and the standard flow rate of the gas passing through the zero pressure valve 6 is proportional to the air standard flow rate of the injected gas. Another gas passes through the
这种应用上述催化燃烧控制系统的催化燃烧控制方法,其特征在于步骤如下:This catalytic combustion control method using the above-mentioned catalytic combustion control system is characterized in that the steps are as follows:
步骤1:运行开始,PLC控制器CPU14通过变频器15启动风机3。Step 1: Start the operation, and the PLC controller CPU14 starts the fan 3 through the frequency converter 15 .
步骤2:前吹扫,通过变频器15控制风机频率不断增加,变频器15的输入频率f与风机3的输出流量Qa成正比,空气通过文丘里混合器4进入催化燃烧器1完成前吹扫;在步骤2中,变频器频率的增量为0.1~1Hz/S。Step 2: Pre-purging, the frequency of the fan is controlled by the frequency converter 15 to increase continuously, the input frequency f of the frequency converter 15 is proportional to the output flow Qa of the fan 3, and the air enters the
步骤3:点火器点火,前吹扫完成后,PLC控制器CPU14通过变频器15将风机3的输入频率降低,并导通点火变压器10放电打火,同时打开点火电磁阀9,燃气通过燃气支管21进入点火器11,点火器11被点燃,若点火器11没有点燃,则关闭点火电磁阀9。Step 3: The igniter is ignited. After the pre-purge is completed, the PLC controller CPU14 reduces the input frequency of the fan 3 through the frequency converter 15, and conducts the
在步骤3中,在点火变压器10接通8秒内,由紫外线探头12判断点火器11是否点着火,当点着火时,PLC控制器CPU14命令主火电磁阀8开启,燃气通过针阀7和零压阀6汇合后经过比例调节阀5,被文丘里混合器4的空气引射而混合,均匀预混气体进入催化燃烧器1,通过催化剂载体2被点火器11点燃;催化燃烧器1被点燃后,PLC控制器CPU14通过变频器15将风机的In step 3, within 8 seconds of turning on the
输入频率提高,此时关闭点火电磁阀9,催化剂载体2处于普通燃烧预热阶段。When the input frequency increases, the
步骤4:催化燃烧器点火,点火器11点燃后,打开主火电磁阀8,燃气从燃气主管20通过零压阀6和针阀7汇合后,通过比例调节阀5进入文丘里混合器4与空气进行均匀混合,燃气与空气的混合浓度略大于燃气的爆炸上限,燃气混合气体进入催化燃烧器1,通过催化剂载体2时被点火器11点燃;若催化剂载体2没有被点燃,则会关闭主火电磁阀8,风机3进行后吹扫,重新点火。Step 4: The catalytic burner is ignited. After the
步骤5:预热,点火成功后,增加风机3的频率,当频率达到预热控制点频率后,燃气与空气的混合浓度略小于燃气理论完全燃烧浓度,维持预热频率不变,关闭点火电磁阀9,催化剂载体2处于普通燃烧预热阶段。Step 5: Preheating, after successful ignition, increase the frequency of fan 3, when the frequency reaches the frequency of the preheating control point, the mixed concentration of gas and air is slightly less than the theoretical complete combustion concentration of gas, keep the preheating frequency unchanged, turn off the
步骤6:起燃温度检测,若温度传感器13的检测温度低于催化剂的起燃温度,维持预热控制点频率不变,继续普通燃烧预热,随着预热温度逐渐升高,达到起燃温度时,增加风机3频率,直至频率到达催化燃烧稳定起始频率或设定催化燃烧温度所对应的频率。Step 6: Detection of the light-off temperature. If the temperature detected by the
步骤7:设定温度判断,通过催化燃烧控制系统使风机维持催化燃烧稳定起始频率或设定的温度所对应的频率,若燃烧温度低于设定温度,则增加风机控制频率,若燃烧温度高于设定温度,则降低风机控制频率,风机控制增减频率的增量为0.01~1Hz/s;在步骤7中,由温度传感器13检测催化剂载体2的设定温度,进行设定温度判断。Step 7: Set the temperature to judge, through the catalytic combustion control system, make the fan maintain the stable starting frequency of catalytic combustion or the frequency corresponding to the set temperature. If the combustion temperature is lower than the set temperature, increase the control frequency of the fan. If the combustion temperature If the temperature is higher than the set temperature, reduce the control frequency of the fan, and the increment of the increase or decrease frequency of the fan control is 0.01 to 1 Hz/s; in
步骤8:催化燃烧控制,燃烧进入催化燃烧段后,重复步骤7,增减风机的频率,催化燃烧控制系统在催化剂的起燃温度和最高限制温度之间自动控制恒温催化燃烧。Step 8: Catalytic combustion control. After the combustion enters the catalytic combustion section,
步骤9:停止或熄火检测,在催化燃烧稳定阶段,若人工命令熄火或催化剂载体2故障等原因熄火,则会进入步骤10,若否,则返回步骤7;在步骤9中,由可见光探测器16在催化燃烧阶段进行停止或熄火检测。Step 9: Stop or flameout detection. In the stable stage of catalytic combustion, if the flameout is manually ordered or the
步骤10:关闭主火电磁阀8,风机吹扫催化燃烧器1后进入步骤11。Step 10: Turn off the main fire solenoid valve 8, and proceed to step 11 after blowing the
步骤11:结束,风机停止。Step 11: End, the fan stops.
本发明的有益效果:请参见图3,已有的文丘里抓零压阀混合技术,只能提供等比例预混气体,本发明可按需要提供连续不同比例的预混气体,满足点火、预热普通燃烧、催化燃烧的燃气与空气不同混合浓度的特殊要求。本发明在零压阀旁并联一个针阀,用来设定流经它的燃气流量,当空气流量Qa或雷诺数Re较小时,一股与空气流量等比例的燃气通过零压阀,另一股等流量的燃气通过针阀,两股燃气汇合后经过比例调节阀进入文丘里与空气混合,此时空气与燃气混合浓度较高,随着空气流量Qa或雷诺数Re的逐渐提高,空气与燃气的混合浓度会逐渐平滑的下降,当雷诺数大于一值后,空气与燃气的混合浓度为一常数,不再随雷诺数增加而改变。因此通过控制风机的流量Qa或雷诺数,就可达到所需要的点火、预热普通燃烧、催化燃烧不同的空气与燃气的混合比,同时在催化燃烧段控制燃烧功率或燃烧温度。Beneficial effects of the present invention: please refer to Fig. 3, the existing Venturi zero-pressure valve mixing technology can only provide equal proportion premixed gas, and the present invention can provide continuous premixed gas with different proportions as required to meet the requirements of ignition, premixed gas Special requirements for different mixing concentrations of hot ordinary combustion, catalytic combustion gas and air. In the present invention, a needle valve is connected in parallel next to the zero-pressure valve to set the flow of gas flowing through it. When the air flow Qa or Reynolds number Re is small, one gas flow in proportion to the air flow passes through the zero-pressure valve, and the other The gas with the same flow rate passes through the needle valve. After the two gas streams meet, they enter the Venturi and mix with the air through the proportional control valve. At this time, the mixing concentration of the air and the gas is relatively high. The mixed concentration of gas will gradually and smoothly decrease. When the Reynolds number is greater than a certain value, the mixed concentration of air and gas will be a constant and will no longer change with the increase of Reynolds number. Therefore, by controlling the flow Qa or Reynolds number of the fan, the required mixing ratio of air and gas for ignition, preheating, common combustion and catalytic combustion can be achieved, and at the same time, the combustion power or combustion temperature can be controlled in the catalytic combustion section.
为了使催化燃烧器的结构得到简化,体积减小,控制系统的自动化程度和控制精度得到提高,本发明采用流体控制与PLC自动控制相结合的技术,提供了一种流体预混控制系统,它包括:一个风机,用来吹扫和提供燃气预混所需要的空气;一个与风机串连的文丘里混合器;一个与文丘里混合器连接的比例调节阀,一个零压阀和一个与零压阀并联的针阀,共同用来控制空气与燃气的混合比,当空气(Qa)通过文丘里混合器的喷嘴时,在喷嘴周围形成负压而引射燃气(Qg),被引射的燃气一股通过零压阀,另一股通过与零压阀并联的针阀,两股燃气汇合后通过比例调节阀进入文丘里混合器与空气在混合腔和渐扩段混合,均匀混合气体进入催化燃烧器整流后,再通过负载催化剂的蜂窝陶瓷载体即可燃烧。本发明的空气与燃气的混合比或燃气混合浓度(Qg/(Qa+Qg)与文丘里喷嘴的空气雷诺数Re有关,而该雷诺数Re是空气流量Qa的函数Re∝f(Qa),换句话说,只要控制了空气流量Qa,就能控制燃气混合浓度和燃气与空气的混合气总流量。In order to simplify the structure of the catalytic burner, reduce the volume, and improve the degree of automation and control precision of the control system, the present invention adopts the technology of combining fluid control and PLC automatic control to provide a fluid premix control system, which Including: a blower for blowing and providing the air required for gas premixing; a Venturi mixer connected in series with the blower; a proportional regulating valve connected with the Venturi mixer, a zero pressure valve and a zero pressure valve The needle valves connected in parallel with the pressure valve are used to control the mixing ratio of air and gas. When the air (Qa) passes through the nozzle of the Venturi mixer, a negative pressure is formed around the nozzle to inject gas (Qg). One of the gas passes through the zero-pressure valve, and the other passes through the needle valve connected in parallel with the zero-pressure valve. After the two gases are combined, they enter the Venturi mixer through the proportional regulating valve and mix with the air in the mixing chamber and the gradual expansion section. The uniformly mixed gas enters the After the catalytic burner is rectified, it can burn through the honeycomb ceramic carrier loaded with catalyst. The mixing ratio of air and gas or the gas mixing concentration (Qg/(Qa+Qg) of the present invention is related to the air Reynolds number Re of the Venturi nozzle, and the Reynolds number Re is a function Re∝f(Qa) of the air flow rate Qa, In other words, as long as the air flow Qa is controlled, the gas mixture concentration and the total flow of the gas-air mixture can be controlled.
本发明采用流体控制与PLC自动控制相结合的技术,其PLC控制系统由一组可编程序控制器和一个变频器组成,可以完成以下五个功能:①用来控制风机的输入频率f来控制风机的输出流量Qa,从而达到吹扫、燃气混合浓度和燃烧功率或温度的控制;②用来控制燃气电磁阀的开或关;③用来控制点火器变压器的开或关;④通过温度传感器判别温度,控制催化燃烧过程;⑤通过紫外线探头和可见光检测器来判断点火、熄火和安全控制。The present invention adopts the technology combining fluid control and PLC automatic control, and its PLC control system is composed of a group of programmable controllers and a frequency converter, which can complete the following five functions: ① used to control the input frequency f of the fan to control The output flow Qa of the fan, so as to achieve the control of purge, gas mixing concentration and combustion power or temperature; ② used to control the opening or closing of the gas solenoid valve; ③ used to control the opening or closing of the igniter transformer; ④ through the temperature sensor Distinguish temperature and control catalytic combustion process; ⑤Use ultraviolet probe and visible light detector to judge ignition, flameout and safety control.
本发明仅须设置一套燃气预混系统,通过控制风机的输入频率f来控制风机的输出风量Qa,可实现催化燃烧所需要的不同混合比,仅在一套燃气预混系统中即可实现直接在催化燃烧器的催化剂载体上实现点火、有焰燃烧预热和催化燃烧。解决了催化燃烧器结构复杂、体积庞大,催化燃烧控制系统成本高和技术难度大的技术问题,无需像已有的催化燃烧器必须设置一个预热燃烧器和两套燃气预混系统。因此本发明使催化燃烧器的结构得到简化,体积减小,而控制系统的自动化程度和控制精度得到提高,成本大幅降低,尤其适合工业大功率燃气催化燃烧器的控制。The present invention only needs to set up a set of gas premixing system, and by controlling the input frequency f of the fan to control the output air volume Qa of the fan, different mixing ratios required for catalytic combustion can be realized, which can be realized only in a set of gas premixing system The ignition, flaming combustion preheating and catalytic combustion are realized directly on the catalyst carrier of the catalytic burner. It solves the technical problems of complex structure and bulky catalytic burner, high cost and technical difficulty of the catalytic combustion control system, and there is no need to set up a preheating burner and two sets of gas premixing systems like the existing catalytic burner. Therefore, the present invention simplifies the structure of the catalytic burner, reduces the volume, improves the degree of automation and control precision of the control system, and greatly reduces the cost, and is especially suitable for the control of industrial high-power gas catalytic burners.
(四)附图说明 (4) Description of drawings
图1是本发明催化燃烧控制系统的结构示意图。Fig. 1 is a structural schematic diagram of the catalytic combustion control system of the present invention.
图2是催化燃烧可编程序控制器与被控制器件关系的示意图。Figure 2 is a schematic diagram of the relationship between the catalytic combustion programmable controller and the controlled device.
图3是已有技术与本发明技术效果对比的曲线示意图。Fig. 3 is a schematic diagram showing the comparison of the technical effects of the prior art and the present invention.
图4是表示变频器的输出频率f与风机的输出流量Qa成线性关系的曲线图。Fig. 4 is a graph showing the linear relationship between the output frequency f of the inverter and the output flow Qa of the fan.
图5是表示本发明变频器的输出频率f与燃气混合浓度的控制关系的曲线图。Fig. 5 is a graph showing the control relationship between the output frequency f of the inverter of the present invention and the gas mixture concentration.
图6是本发明的催化燃烧控制执行流程图。Fig. 6 is a flowchart of catalytic combustion control execution in the present invention.
1-催化燃烧器;2-负载催化剂载体;3-风机;4-文丘里混合器;5-比例调节阀;6-零压阀;7-针阀;8-主火电磁阀;9-点火电磁阀;10-点火变压器;11-点火器;12-紫外线探头;13-温度传感器。14-PLC控制器CPU;15-变频器;16-可见光探测器;17-模/数转换模块;18-数/模转换模块;19-文本显示器;20-燃气主管;21-燃气支管。1-catalytic burner; 2-loaded catalyst carrier; 3-fan; 4-venturi mixer; 5-proportional control valve; 6-zero pressure valve; 7-needle valve; 8-main fire solenoid valve; 9-ignition Solenoid valve; 10-ignition transformer; 11-igniter; 12-ultraviolet probe; 13-temperature sensor. 14-PLC controller CPU; 15-inverter; 16-visible light detector; 17-analog/digital conversion module; 18-digital/analog conversion module; 19-text display; 20-gas main pipe; 21-gas branch pipe.
f-风机输入频率、f1-点火控制频率、f2-预热燃烧控制频率、f3-催化燃烧稳定起始频率、f4-最高温度控制频率、fb-吹扫控制频率。L1-点火燃气预混浓度、L2-预热普通燃烧燃气预混浓度、L3-催化燃烧燃气预混浓度。Qa-风机输出的标准空气流量、Qg-预混的燃气标准流量。T1一起燃温度、T2-最高限制温度、Tc-设定燃烧温度。f-fan input frequency, f1-ignition control frequency, f2-preheat combustion control frequency, f3-catalytic combustion stable initial frequency, f4-maximum temperature control frequency, fb-purge control frequency. L1-ignition gas premix concentration, L2-preheating common combustion gas premix concentration, L3-catalytic combustion gas premix concentration. Qa- standard air flow output by fan, Qg- standard flow of premixed gas. T1 is the ignition temperature, T2 is the maximum limit temperature, and Tc is the set combustion temperature.
(五)具体实施方式 (5) Specific implementation methods
参见图1、图2,本发明催化燃烧控制系统由流体预混控制系统和PLC控制器件两大部分连接组成。Referring to Fig. 1 and Fig. 2, the catalytic combustion control system of the present invention is composed of a fluid premix control system and a PLC control device.
流体预混控制系统包括;一台风机3串联一个文丘里混合器4,用来吹扫催化燃烧器1和利用文丘里混合器4引射燃气并进行均匀预混,文丘里混合器4的出风口与催化燃烧器1的进风口连接,文丘里混合器4的喉管吸风口与一个比例调节阀5连接,用来设定催化燃烧阶段最佳燃气预混浓度,比例调节阀5的进口与一个零压阀6的出口连接,用来保证进入比例调节阀5的燃气接近常压,零压阀6的进出口两端并联一个针阀7,用来设定点火到预热有焰燃烧的最佳燃气预混浓度。The fluid premixing control system includes; a blower 3 connected in series with a Venturi mixer 4, which is used to purge the
PLC控制器件包括:PLC control devices include:
一个PLC控制器CPU14,具有存储器特性,I/O特性,集成的通信功能,电源特性,数字量输入输出特性,例如型号S7-200,CPU244。A PLC controller CPU14, with memory characteristics, I/O characteristics, integrated communication functions, power supply characteristics, digital input and output characteristics, such as model S7-200, CPU244.
一个与PLC控制器CPU14控制信号输出端连接、并用于控制风机3输入频率f的变频器15。A frequency converter 15 connected to the control signal output end of the PLC controller CPU14 and used to control the input frequency f of the blower fan 3 .
一个分别连接PLC控制器CPU14控制信号输出端和变频器15的输入端的数/模转换模块18,模块的型号例如EM232。A digital/analog conversion module 18 connected to the control signal output end of the PLC controller CPU14 and the input end of the frequency converter 15 respectively, the model of the module is EM232, for example.
一个用于检测负载催化剂载体的温度的温度传感器13。A
一个与温度传感器13信号连接、并与PLC控制器CPU14信号输入端连接的模/数转换模块17,模块的型号例如EM235。An analog/digital conversion module 17 connected with the signal of the
一个连接于燃气主管20中、用于控制燃气预混开关、并与零压阀6连接的主火电磁阀8。A main fire solenoid valve 8 connected to the gas
一个用于控制点火器11的燃气开关、连接在燃气支管21中的点火电磁阀9。A gas switch for controlling the
一个用于对点火器11放电点火的点火变压器10。An
一个置于点火器附近、用于判断点火器11和负载催化剂载体2是否被点燃的紫外线探头12。An
一个置于负载催化剂载体2前方、并与PLC控制器CPU14信号连接的可见光探测器16。A
一个与PLC控制器CPU14信号连接的文本显示器19,用于参数设定、工作状态和数据显示,例如型号TD-200。A text display 19 connected with the PLC controller CPU14 signal, used for parameter setting, working status and data display, such as model TD-200.
一种应用上述催化燃烧控制系统的催化燃烧控制方法:由PLC控制器CPU14通过变频器15控制风机3的输入频率f,风机3的输入频率f与输出的空气流量Qa成正比,当空气通过文丘里混合器4的喷嘴时,在喷嘴周围形成负压引射燃气,被引射的燃气一股通过零压阀6,通过零压阀6的燃气标准流量与引射燃气的空气标准流量成等比关系;另一股燃气通过与零压阀6并联的针阀7,通过针阀7的标准燃气流量基本恒定,两股燃气合并后经过比例调节阀5进入文丘里的混合腔和渐扩段与空气均匀预混,燃气与空气的预混浓度Qg/Qg+Qa与空气通过文丘里喷嘴的雷诺数或流量有关,当雷诺数较小时,燃气与空气的混合浓度较高,随着雷诺数的逐渐增加,燃气与空气的混合浓度会逐渐降低,当雷诺数大于一值后,燃气与空气的混合浓度不再随雷诺数的增加而改变,参见图3和图5,根据本发明流体混合控制的雷诺数与燃气混合浓度的关系和变频器的输出频率f与燃气混合浓度Qg/Qg+Qa的关系,通过控制风机3的输入频率,分别控制点火、预热、催化燃烧所需的不同的燃气与空气混合浓度,以及在催化燃烧阶段控制催化燃烧功率或温度。A catalytic combustion control method using the above catalytic combustion control system: the input frequency f of the fan 3 is controlled by the PLC controller CPU14 through the frequency converter 15, the input frequency f of the fan 3 is proportional to the output air flow Qa, when the air passes through the Venturi When using the nozzle of the mixer 4, a negative pressure is formed around the nozzle to inject gas, and the injected gas passes through the zero pressure valve 6, and the standard flow rate of the gas passing through the zero pressure valve 6 is equal to the air standard flow rate of the injected gas. The other gas passes through the
参见图1、图2、图5和图6,本发明的催化燃烧控制方法采用流体控制与PLC自动控制相结合的技术,其具体控制步骤如下:Referring to Fig. 1, Fig. 2, Fig. 5 and Fig. 6, the catalytic combustion control method of the present invention adopts the technology combining fluid control and PLC automatic control, and its specific control steps are as follows:
步骤1:运行前通过文本19设定参数如温度,发出运行指令,PLC控制器CPU 14通过变频器15启动风机3。Step 1: Before running, set parameters such as temperature through text 19, issue a running command, and the PLC controller CPU 14 starts the fan 3 through the frequency converter 15.
步骤2:前吹扫,通过数/模转换模块18调节变频器15的输出频率控制风机的输入频率,频率由0增加到fb,维持频率fb不变,空气通过文丘里混合器4进入催化燃烧器1,完成前吹扫。Step 2: Pre-purge, adjust the output frequency of the frequency converter 15 through the digital/analog conversion module 18 to control the input frequency of the fan, increase the frequency from 0 to fb, keep the frequency fb unchanged, and enter the catalytic combustion through the Venturi mixer 4
步骤3:点火器点火,前吹扫完成后,PLC控制器CPU14通过变频器15将风机3的输入频率由fb降低到f1,频率递减的增量为0.1~1Hz/s,维持频率f1,并导通点火变压器10放电打火,同时打开点火电磁阀9,燃气通过燃气支管21进入点火器11,点火器11被点燃,若点火器11没有点燃,则关闭点火电磁阀9。Step 3: The igniter is ignited, and after the pre-purge is completed, the PLC controller CPU14 reduces the input frequency of the fan 3 from fb to f1 through the frequency converter 15, and the increment of frequency decrease is 0.1-1Hz/s, maintains the frequency f1, and
本发明在点火变压器10接通8秒内,由紫外线探头12判断点火器11是否点着火后,当点着火时,PLC控制器CPU14命令主火电磁阀8开启,燃气通过针阀7和零压阀6汇合后经过比例调节阀5,被文丘里混合器4的空气引射而混合,均匀预混气体进入催化燃烧器1,通过催化剂载体2被点火器11点燃;催化燃烧器1被点燃后,PLC控制器CPU14通过变频器15将风机的输入频率由f1提高f2,频率增加的增量为0.01~1Hz/s,维持频率f2,催化剂载体2处于普通燃烧预热阶段,此时关闭点火电磁阀9。In the present invention, within 8 seconds after the
步骤4:催化燃烧器点火,点火器11点燃后,打开主火电磁阀8,燃气从燃气主管20通过零压阀6和针阀7汇合后,通过比例调节阀5进入文丘里混合器4与空气进行均匀混合,燃气与空气的混合浓度L1略大于燃气的爆炸浓度上限,燃气混合气体进入催化燃烧器1,通过催化剂载体2时被点火器11点燃;若催化剂载体2没有被点燃,则会关闭主火电磁阀8,风机3进行后吹扫,重新点火。Step 4: The catalytic burner is ignited. After the
步骤5:预热,点火成功后,增加风机3的频率,当频率达到预热控制点频率f2后,燃气与空气的混合浓度略小于燃气理论完全燃烧浓度L2,维持频率不变,关闭点火电磁阀9,催化剂载体2处于普通有焰燃烧预热阶段。Step 5: Preheating, after the ignition is successful, increase the frequency of fan 3, when the frequency reaches the frequency f2 of the preheating control point, the mixed concentration of gas and air is slightly less than the theoretical complete combustion concentration L2 of the gas, keep the frequency unchanged, and turn off the ignition solenoid The
步骤6:起燃温度检测,若温度传感器13的检测温度低于催化剂的起燃温度t1,维持预热控制点频率f2不变,继续预热燃烧,随着预热温度逐渐升高,达到起燃温度t1时,增加风机3频率,直至频率到达催化燃烧稳定起始频率f3或设定催化燃烧温度Td(T2>Td≥T1)所对应的频率fd。Step 6: Detection of the light-off temperature. If the detection temperature of the
步骤7:设定温度判断,通过PLC控制系统使风机维持催化燃烧稳定起始频率f3或设定的温度tc所对应的频率fd,若温度传感器13检测催化剂载体2的燃烧温度低于设定温度,则增加风机控制频率,若燃烧温度高于设定温度,则降低风机控制频率,风机控制增减频率的增量为0.01~1Hz/s。Step 7: Set the temperature to judge, through the PLC control system, make the fan maintain the catalytic combustion stable initial frequency f3 or the frequency fd corresponding to the set temperature tc, if the
步骤8:催化燃烧控制,燃烧进入催化燃烧稳定阶段后,重复步骤7,通过温度判断,增减风机的频率,使催化燃烧器1在起燃温度t1和最高限制温度t2之间自动控制恒温催化燃烧。Step 8: Catalytic combustion control. After the combustion enters the stable stage of catalytic combustion, repeat
步骤9:停止或熄火检测,在催化燃烧稳定阶段,若命令熄火或可见光探测器16检测到催化剂载体2熄火,则会进入步骤10,若否,则返回步骤7。Step 9: Stop or flameout detection. In the stable stage of catalytic combustion, if the flameout is commanded or the
步骤10:关闭主火电磁阀8,风机吹扫催化燃烧器1后进入步骤11。Step 10: Turn off the main fire solenoid valve 8, and proceed to step 11 after blowing the
步骤11:结束,风机停止。Step 11: End, the fan stops.
控制参数的选择与燃烧器的燃烧功率有关,实施例如下:The selection of control parameters is related to the combustion power of the burner. Examples are as follows:
点火控制频率范围f1=5~10Hz;Ignition control frequency range f1=5~10Hz;
预热燃烧频率范围f2=11~19Hz;Preheating combustion frequency range f2=11~19Hz;
催化燃烧段控制频率范围f3-f4为20~50Hz;The control frequency range f3-f4 of the catalytic combustion section is 20-50Hz;
吹扫频率f4>fb≥f3;Purge frequency f4>fb≥f3;
催化剂起燃温度与催化剂组分有关,t1=360~600℃;Catalyst light-off temperature is related to catalyst components, t1=360~600℃;
催化剂最高控制温度t2=1160℃;Catalyst maximum control temperature t2 = 1160°C;
常温t0=40~50℃。Normal temperature t0=40~50℃.
催化燃烧器1的运行控制过程:Operation control process of catalytic burner 1:
PLC控制器CPU14发出指令,通过变频器15启动风机3,通过EM232模块18调节变频器15的输出频率控制风机3的风量Qa,启动频率从0逐渐增加到吹扫频率fb(f4>fb≥f3),变频器频率增加的增量为0.1~1Hz/S,风机维持频率fb,,空气通过文丘里混合器4进入催化燃烧器1中,完成前吹扫。The PLC controller CPU14 issues instructions to start the fan 3 through the frequency converter 15, adjust the output frequency of the frequency converter 15 through the EM232 module 18 to control the air volume Qa of the fan 3, and the starting frequency gradually increases from 0 to the blowing frequency fb (f4>fb≥f3 ), the increment of the inverter frequency is 0.1-1Hz/S, the fan maintains the frequency fb, the air enters the
前吹扫完成后,PLC控制器CPU14通过EM232模块18调节变频器15的输出频率f,将风机的输入频率由fb降到f1,减小风机的流量,变频器频率降低的增量为0.1~1Hz/S,然后PLC控制器CPU14发出点火信号指令,导通点火变压器10放电打火,同时PLC控制器CPU14发出信号打开点火电磁阀9,使一股燃气流经点火器11处,燃气遇点火变压器10打火点燃;点火变压器10开始打火时,紫外线探头12同时开始对点火器11进行检测,若8秒钟内紫外线探头12检测点火器11未被点燃,PLC控制器CPU14将停止点火变压器10放电,同时关断点火电磁阀9。After the pre-purge is completed, the PLC controller CPU14 adjusts the output frequency f of the frequency converter 15 through the EM232 module 18, reduces the input frequency of the fan from fb to f1, reduces the flow rate of the fan, and the increment of frequency converter frequency reduction is 0.1~ 1Hz/S, then the PLC controller CPU14 sends out an ignition signal command, conducts the
紫外线探头12判断点火器11被点燃后,点火器11持续燃烧,同时PLC控制器CPU14控制主火电磁阀8开启,燃气分别通过针阀7和零压阀6汇合后经过比例调节阀5,进入文丘里混合器4与空气混合。参照图5,点火的风机频率f1所对应的燃气与空气的混合浓度为L1(对于天然气,L1=17%左右),均匀混合气体进入催化燃烧器1,通过负载催化剂的蜂窝陶瓷载体2时被点火器11点燃;若紫外线探头12检测负载催化剂的蜂窝陶瓷载体2未被点燃,PLC控制器15将关断主火电磁阀8,并进行后吹扫,数分钟后关闭风机,等待检查或重新点火。After the
紫外线探头12判断点火成功后,PLC控制器CPU14通过EM232模块18调节变频器15增加风机的输入频率f,提高风机的空气流量Qa,变频器频率增加的增量为0.01~1Hz/S,当变频器的输入频率达到到f2时,对应的燃气混合浓度为L2(对于天然气,L2=10%左右),维持变频器频率f2不变,同时关闭点火电磁阀9,催化剂载体2处于普通燃烧预热阶段,温度逐渐升高,当温度传感器13检测到催化剂载体2的预热温度达到催化剂的起燃温度t1时,PLC控制器CPU14通过EM232模块18调节变频器15,控制风机的输入频率f,频率由f2增加到f3或fd(f4>fd≥f3),对应的燃气与空气的混合浓度为L3(对于天然气,L3=5%左右),变频器频率增加的增量为0.01~1Hz/S,催化燃烧器进入催化燃烧阶段,在催化燃烧阶段,增加风机的输入频率,燃气混合浓度基本不变,但燃烧功率增加或燃烧温度增加。After the
在催化燃烧阶段,PLC控制器CPU14通过温度传感器13和模/数转换模块17判断催化剂载体2是否达到设定燃烧温度tc,若高于或低于设定温度,PLC控制器CPU14通过数/模转化模块18和变频器15控制风机减或增加风机频率来控制催化燃烧温度,达到恒温燃烧。In the catalytic combustion stage, the PLC controller CPU14 judges whether the
在催化燃烧阶段,若人为命令熄火或可见光探测器16检测到催化载体2熄火后,PLC控制器CPU14将关闭主火电磁阀8,并进行熄火后吹扫,当温度传感器13检测催化剂载体2的温度达到常温T0时,PLC控制器CPU14将发出指令停止风机3运行。In the catalytic combustion stage, if the flameout is artificially ordered or after the
上述实施例是针对燃气为天然气催化燃烧描述的,但本发明不限于上述实施例。本发明适合所有类型的燃气催化燃烧控制,如煤层气、沼气、煤气、石油液化气、热裂解油制气、催化裂解油制气等。只需根据不同的燃气成分,选用适合该燃气成分的催化剂和对应的点火燃气混合浓度L1(略大于燃气爆炸浓度上限)、预热普通燃烧燃气混合浓度L2(略小于理论完全燃烧浓度)和催化燃烧燃气混合浓度L3(最佳催化燃烧浓度),重新设定比例调节阀5和针阀7的开度,通过本发明的催化燃烧控制系统即可达到催化燃烧控制的目的。The above embodiments are described for the catalytic combustion of natural gas as the fuel gas, but the present invention is not limited to the above embodiments. The invention is suitable for all types of gas catalytic combustion control, such as coal bed methane, marsh gas, coal gas, petroleum liquefied gas, thermal cracking oil to gas, catalytic cracking oil to gas and the like. It is only necessary to select a catalyst suitable for the gas composition and the corresponding ignition gas mixing concentration L1 (slightly greater than the upper limit of the gas explosion concentration), preheating ordinary combustion gas mixing concentration L2 (slightly lower than the theoretical complete combustion concentration) and catalytic Combustion gas mixed concentration L3 (optimum catalytic combustion concentration), resetting the opening of the
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB2006102012418A CN100422639C (en) | 2006-12-08 | 2006-12-08 | Catalytic combustion control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB2006102012418A CN100422639C (en) | 2006-12-08 | 2006-12-08 | Catalytic combustion control system |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1971135A CN1971135A (en) | 2007-05-30 |
CN100422639C true CN100422639C (en) | 2008-10-01 |
Family
ID=38112070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB2006102012418A Expired - Fee Related CN100422639C (en) | 2006-12-08 | 2006-12-08 | Catalytic combustion control system |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN100422639C (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101334645B (en) * | 2008-07-15 | 2010-06-02 | 西安交通大学 | Intelligent temperature control system of household air conditioner based on human behavior characteristics |
CN102477705A (en) * | 2010-11-22 | 2012-05-30 | 贵州钢绳厂附属企业公司 | Method and device for removing surface needling of natural fiber rope core |
CN102913918B (en) * | 2011-08-01 | 2015-06-17 | 中国石油化工股份有限公司 | Catalytic combustion processing method of high-concentration organic exhaust gas |
CN102418937B (en) * | 2011-11-01 | 2013-12-11 | 德化县兰星自动化工程有限公司 | Combustion air and natural gas linear proportion control system for ceramic kiln |
CN102519041B (en) * | 2011-12-23 | 2015-09-23 | 李延新 | A kind of numerical control gas burner |
CN103045815A (en) * | 2012-12-19 | 2013-04-17 | 苏州工业园区姑苏科技有限公司 | Fuel gas heating control method |
CN104421959A (en) * | 2013-09-10 | 2015-03-18 | 北新集团建材股份有限公司 | Gas burning system and igniting method thereof |
CN103727527A (en) * | 2014-01-02 | 2014-04-16 | 北京建筑大学 | High-power practical gas catalytic combustion kiln |
CN103900103B (en) * | 2014-04-16 | 2016-01-06 | 上海禾森机电有限公司 | A kind of control method of air blast burner |
CN104534508B (en) * | 2014-12-24 | 2016-09-07 | 潍坊思创环保设备有限公司 | A kind of biogas safe combustion controls device and control method |
CN106524479A (en) * | 2016-09-30 | 2017-03-22 | 芜湖美的厨卫电器制造有限公司 | Gas water heater |
CN107415460B (en) * | 2017-08-24 | 2023-04-07 | 东莞方皓汽车配件有限公司 | Closed gas air dryer |
CN110513718A (en) * | 2018-05-21 | 2019-11-29 | 安德森热能科技(苏州)有限责任公司 | A kind of method of flameless combustion control system |
CN110073863B (en) * | 2019-05-07 | 2024-03-26 | 中科盛火(北京)热能技术有限公司 | A gas fertilizer and heat combined supply device and its control method |
CN112303894A (en) * | 2019-07-30 | 2021-02-02 | 芜湖美的厨卫电器制造有限公司 | Gas water heater and gas water heater control method |
CN110513092B (en) * | 2019-09-18 | 2021-08-27 | 吉林大学 | Catalytic combustion device for assisting oil shale in-situ mining and using method thereof |
CN112610987A (en) * | 2021-01-12 | 2021-04-06 | 广州合隆智能设备有限公司 | Cooking range system |
CN113218070A (en) * | 2021-05-17 | 2021-08-06 | 华帝股份有限公司 | Novel gas heater waste gas energy utilization and prevent wind backward flow device and system |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5078973A (en) * | 1985-01-30 | 1992-01-07 | Babcoco-Hitachi Kabushiki Kaisha | Apparatus for treating flue gas |
CN1172524A (en) * | 1995-11-14 | 1998-02-04 | 气体应用公司 | Cooking appliance with catalytic burner |
JPH11148640A (en) * | 1997-11-18 | 1999-06-02 | Matsushita Electric Ind Co Ltd | Catalyst combustion device |
US6095793A (en) * | 1998-09-18 | 2000-08-01 | Woodward Governor Company | Dynamic control system and method for catalytic combustion process and gas turbine engine utilizing same |
CN1543556A (en) * | 2001-12-19 | 2004-11-03 | �Դ���� | A heating appliance |
CN1864032A (en) * | 2003-07-31 | 2006-11-15 | 麦斯国际有限公司 | Recuperated gas turbine engine system and method employing catalytic combustion |
-
2006
- 2006-12-08 CN CNB2006102012418A patent/CN100422639C/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5078973A (en) * | 1985-01-30 | 1992-01-07 | Babcoco-Hitachi Kabushiki Kaisha | Apparatus for treating flue gas |
CN1172524A (en) * | 1995-11-14 | 1998-02-04 | 气体应用公司 | Cooking appliance with catalytic burner |
JPH11148640A (en) * | 1997-11-18 | 1999-06-02 | Matsushita Electric Ind Co Ltd | Catalyst combustion device |
US6095793A (en) * | 1998-09-18 | 2000-08-01 | Woodward Governor Company | Dynamic control system and method for catalytic combustion process and gas turbine engine utilizing same |
CN1543556A (en) * | 2001-12-19 | 2004-11-03 | �Դ���� | A heating appliance |
CN1864032A (en) * | 2003-07-31 | 2006-11-15 | 麦斯国际有限公司 | Recuperated gas turbine engine system and method employing catalytic combustion |
Also Published As
Publication number | Publication date |
---|---|
CN1971135A (en) | 2007-05-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN100422639C (en) | Catalytic combustion control system | |
CN100394107C (en) | Controllable flue gas self-recirculation volume type low-pollution burner | |
CN106642646A (en) | Gas water heater and control method thereof | |
CN110056873A (en) | A kind of low nitrogen combustion apparatus suitable for fuel gas with low heat value | |
US7444820B2 (en) | Method and system for rich-lean catalytic combustion | |
KR20100037475A (en) | Low nox industrial waste gas burner and boiler system thereof | |
CN209399368U (en) | The low nitrogen gas burner of L-type | |
CN1860334A (en) | Method and device for the combustion of fuel | |
Alavandi et al. | Low single digit NOx emissions catalytic combustor for advanced hydrogen turbines for clean coal power systems | |
WO2021063049A1 (en) | Gas water heater | |
CN111780154B (en) | Control device and method for gas-fired machine and gas water heater | |
CN218763438U (en) | Flameless combustion device for low-calorific-value waste gas | |
CN110006059B (en) | Micro-gas combined pilot burner ignition system and method | |
CN210532368U (en) | flameless burner | |
CN206234816U (en) | A kind of gas inlet combustion control device of paper web heater | |
CN2878940Y (en) | Gas fuel catalytic burner | |
CN2748785Y (en) | Biomass gas combustor | |
CN213335585U (en) | Low-pollution automatic control system for catalytic combustion of natural gas heating furnace | |
CN218296232U (en) | Low nitrogen and large range low calorific value gas fuel oven | |
CN111649344A (en) | Low calorific value gas combustion system and control method | |
CN222316974U (en) | A fully premixed combustion device with a radiant belt heater | |
CN219414771U (en) | Plasma-assisted coal-fired boiler ammonia-doped combustion and NOx ultra-low emission system | |
CN222480492U (en) | Low-heating value low-nitrogen combustor | |
CN221917925U (en) | A gasification furnace positive pressure baking system | |
CN218128144U (en) | Heating device for food |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081001 Termination date: 20151208 |
|
EXPY | Termination of patent right or utility model |