CN107575864B - Linear low-nitrogen gas combustion head - Google Patents
Linear low-nitrogen gas combustion head Download PDFInfo
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- CN107575864B CN107575864B CN201710851562.0A CN201710851562A CN107575864B CN 107575864 B CN107575864 B CN 107575864B CN 201710851562 A CN201710851562 A CN 201710851562A CN 107575864 B CN107575864 B CN 107575864B
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Abstract
一种线性低氮燃气燃烧头，包括助燃风入口管(2)、燃气分配室(3)、一级燃烧头(4)、火焰筒(9)、二级环状线性喷嘴(10)、燃气入口管路(14)等；助燃风入口管(2)一端通过端部的风筒安装法兰(1)与助燃风机或风道相连，另一端连接火焰筒(9)；燃气分配室(3)位于助燃风入口管(2)和火焰筒(9)的外壁上，燃气分配室(3)分别与燃气入口管路(14)、一级燃烧头(4)和二级环状线性喷嘴(10)连通；二级环状线性喷嘴(10)包括多枝喷枪，沿火焰筒(9)端口周向分布；火焰筒(9)位于燃气分配室(3)内的筒壁上铺设隔热层(6)。本发明的燃气可以高效扩散混合，NOx生成量低于20mg/m3，以减轻燃烧产物对大气的污染。
A linear low-nitrogen gas burner head comprises a combustion-supporting air inlet pipe (2), a gas distribution chamber (3), a primary combustion head (4), a flame tube (9), a secondary annular linear nozzle (10), a gas inlet pipeline (14), etc.; one end of the combustion-supporting air inlet pipe (2) is connected to a combustion-supporting fan or an air duct through a wind tube mounting flange (1) at the end, and the other end is connected to the flame tube (9); the gas distribution chamber (3) is located on the outer wall of the combustion-supporting air inlet pipe (2) and the flame tube (9), and the gas distribution chamber (3) is respectively connected to the gas inlet pipeline (14), the primary combustion head (4) and the secondary annular linear nozzle (10); the secondary annular linear nozzle (10) comprises a plurality of spray guns, which are circumferentially distributed along the port of the flame tube (9); the flame tube (9) is located in the gas distribution chamber (3) and a heat insulation layer (6) is laid on the cylinder wall. The gas of the present invention can be efficiently diffused and mixed, and the NOx generation amount is less than 20 mg/ m3 , so as to reduce the pollution of the combustion products to the atmosphere.
Description
技术领域Technical Field
本发明涉及一种燃烧装置，尤其涉及一种低氮燃气燃烧装置。The invention relates to a combustion device, in particular to a low-nitrogen fuel gas combustion device.
背景技术Background technique
传统的燃气燃烧器所采用的燃烧方式一般为强制扩散混合、部分预混和完全预混三种燃烧方式。三种燃烧方式各有优缺点，强制扩散式混合效果差，燃烧速度慢，但无回火危险；其他两种燃烧方式混合好，燃烧速度快，但有回火危险。The combustion methods used by traditional gas burners are generally forced diffusion mixing, partial premixing and complete premixing. The three combustion methods have their own advantages and disadvantages. The forced diffusion type has poor mixing effect and slow combustion speed, but no flashback risk; the other two combustion methods have good mixing and fast combustion speed, but there is a flashback risk.
传统的燃气燃烧器喷嘴型式一般为多管式或盘式多孔型式，燃气通常沿燃烧器中心轴向、径向或切向进行喷射，一般采用单级喷嘴或双级喷嘴。传统的燃气燃烧器喷嘴结构型式单一，燃气扩散混合方式简单，燃烧烟气中的大气污染物氮氧化物(NOX)生成量较高，通常不低于120mg/m3。The conventional gas burner nozzle is generally a multi-tube or disc-type multi-hole type. The gas is usually injected along the central axis, radial direction or tangential direction of the burner. Single-stage nozzles or double-stage nozzles are generally used. The conventional gas burner nozzle has a single structure, a simple gas diffusion and mixing method, and the atmospheric pollutant nitrogen oxide (NO X ) generated in the combustion flue gas is relatively high, usually not less than 120 mg/m 3 .
发明内容Summary of the invention
本发明所要解决的技术问题是：针对传统燃气燃烧器存在的燃气扩散混合不足和NOX生成量较高的问题，提供了一种线性低氮燃气燃烧头，燃气可以高效扩散混合，NOX生成量低于20mg/m3，以减轻燃烧产物对大气的污染。The technical problem to be solved by the present invention is: in view of the problems of insufficient gas diffusion and mixing and high NOx generation in traditional gas burners, a linear low-nitrogen gas burner head is provided, which can efficiently diffuse and mix the gas and generate less NOx than 20mg/ m3 , so as to reduce the pollution of the combustion products to the atmosphere.
本发明采用的技术方案是：一种线性低氮燃气燃烧头，包括助燃风入口管、燃气分配室、一级燃烧头、隔热层、火焰筒、二级环状线性喷嘴、燃气入口管路；助燃风入口管一端通过端部的风筒安装法兰与助燃风机或风道相连，另一端连接火焰筒；燃气分配室位于助燃风入口管和火焰筒的外壁上，燃气分配室分别与燃气入口管路、一级燃烧头和二级环状线性喷嘴连通；二级环状线性喷嘴包括n枝喷枪，沿火焰筒端口周向分布；火焰筒位于燃气分配室内的筒壁上铺设隔热层，其中，n为正整数。The technical solution adopted by the present invention is: a linear low-nitrogen gas burner head, including a combustion-supporting air inlet pipe, a gas distribution chamber, a first-level burner head, a thermal insulation layer, a flame tube, a second-level annular linear nozzle, and a gas inlet pipeline; one end of the combustion-supporting air inlet pipe is connected to the combustion-supporting fan or the air duct through the wind tube mounting flange at the end, and the other end is connected to the flame tube; the gas distribution chamber is located on the outer wall of the combustion-supporting air inlet pipe and the flame tube, and the gas distribution chamber is respectively connected to the gas inlet pipeline, the first-level burner head and the second-level annular linear nozzle; the second-level annular linear nozzle includes n spray guns, which are distributed circumferentially along the flame tube port; the flame tube is located on the tube wall in the gas distribution chamber and a thermal insulation layer is laid, wherein n is a positive integer.
所述燃气分配室为环状柱形容腔，包括左端板、燃气室外筒、右端板；燃气室外筒及安装在燃气室外筒两端的左端板、右端板安装在助燃风入口管、火焰筒组成的筒形结构上，形成环状柱形容腔；燃气室外筒为圆柱形钢筒；左端板为圆环形盖板；右端板为环形盖板，位于火焰筒端口处，用于安装二级环状线性喷嘴；燃气室外筒上设置有燃烧机安装法兰,燃气分配室通过燃烧机安装法兰与炉体相连。The gas distribution chamber is an annular cylindrical cavity, including a left end plate, a gas chamber outer cylinder, and a right end plate; the gas chamber outer cylinder and the left end plate and the right end plate installed at both ends of the gas chamber outer cylinder are installed on a cylindrical structure composed of a combustion-supporting air inlet pipe and a flame tube to form an annular cylindrical cavity; the gas chamber outer cylinder is a cylindrical steel cylinder; the left end plate is a circular ring cover plate; the right end plate is an annular cover plate, which is located at the port of the flame tube and is used to install a secondary annular linear nozzle; a burner mounting flange is provided on the gas chamber outer cylinder, and the gas distribution chamber is connected to the furnace body through the burner mounting flange.
所述一级燃烧头包括燃气分配弯管、扩散盘、一级线性喷嘴、三级喷嘴、点火电极和火焰探测杆；燃气分配弯管位于火焰筒内，与燃气分配室相连，弯管出口段与火焰筒中心线同轴，出口段端口安装三级喷嘴；三级喷嘴为开有若干通孔的圆形盖板；各一级线性喷嘴沿燃气分配弯管周向均匀分布，靠近燃气分配弯管出口段端口，一级线性喷嘴上开有通孔；扩散盘紧贴一级线性喷嘴并安装在燃气分配弯管上，扩散盘上开有若干通风孔；点火电极和火焰探测杆固定在燃气分配弯管出口段上。The first-stage burner head comprises a gas distribution elbow, a diffusion disk, a first-stage linear nozzle, a third-stage nozzle, an ignition electrode and a flame detection rod; the gas distribution elbow is located in the flame tube and is connected to the gas distribution chamber, the outlet section of the elbow is coaxial with the center line of the flame tube, and the third-stage nozzle is installed at the outlet section port; the third-stage nozzle is a circular cover plate with a plurality of through holes; each first-stage linear nozzle is evenly distributed along the circumference of the gas distribution elbow, and is close to the outlet section port of the gas distribution elbow, and the first-stage linear nozzle is provided with a through hole; the diffusion disk is close to the first-stage linear nozzle and is installed on the gas distribution elbow, and the diffusion disk is provided with a plurality of ventilation holes; the ignition electrode and the flame detection rod are fixed on the outlet section of the gas distribution elbow.
所述燃气分配弯管在靠近出口段端口处、沿圆周方向上均布8～12个圆孔，用于安装一级线性喷嘴。The gas distribution elbow has 8 to 12 circular holes evenly distributed along the circumferential direction near the outlet section port, which are used to install the first-level linear nozzle.
所述每枝一级线性喷嘴为圆筒形，沿轴线方向上开有两排喷气孔，每排孔呈一字形排列，各一级线性喷嘴的出口端用无孔盖板封堵。Each primary linear nozzle is cylindrical, with two rows of jet holes opened along the axial direction, each row of holes is arranged in a straight line, and the outlet end of each primary linear nozzle is blocked by a hole-free cover plate.
所述各一级线性喷嘴在纵向截面上，两排孔中心与圆柱圆心的连线之间的夹角为90°。In the longitudinal section of each primary linear nozzle, the angle between the line connecting the centers of the two rows of holes and the center of the cylinder is 90°.
所述二级环状线性喷嘴中每枝喷枪轴线与火焰筒中心线呈5°～15°范围内的夹角。The axis of each spray gun in the secondary annular linear nozzle forms an angle within the range of 5° to 15° with the center line of the flame tube.
所述助燃风入口管与火焰筒同轴且直径相同。The combustion-supporting air inlet pipe is coaxial with the flame tube and has the same diameter as that of the flame tube.
所述二级环状线性喷嘴喷孔直径为4mm。The diameter of the spray hole of the secondary annular linear nozzle is 4 mm.
所述火焰筒出口采用收缩口型式，端口呈锥形。The flame tube outlet adopts a contraction mouth type, and the port is conical.
本发明与现有技术相比优点在于：Compared with the prior art, the present invention has the following advantages:
本发明中一级燃气喷嘴和二级燃气喷嘴采用的线性喷嘴将燃气分成多个细小气流高速喷出，加强的燃气的扩散强度，使燃气与助燃风混合更加充分，燃气燃烧更加均匀，避免局部高温燃烧，有助于降低NOX生成量；一级线性喷嘴喷出的“V”形燃气射流与相邻喷嘴喷出的射流进行强烈撞击、破碎，有助于燃气的扩散与混合；燃气分别从一级线性喷嘴、二级环状线性喷嘴和三级喷嘴喷出进行分级燃烧，很大程度抑制了NOX的生成量，实现了低NOX燃烧；二级环状线性喷嘴根部区域的负压区卷吸烟气，实现了烟气再循环燃烧，也非常有效的降低NOX生成量。采用本发明，当助燃风为纯空气时，NOX生成量低于40mg/m3；当助燃风采用空气与燃烧烟气的混合物时，NOX生成量低于20mg/m3。The linear nozzles used in the first-stage gas nozzle and the second-stage gas nozzle of the present invention divide the gas into multiple fine airflows for high-speed ejection, and enhance the diffusion intensity of the gas, so that the gas and the combustion-supporting air are mixed more fully, the gas combustion is more uniform, and local high-temperature combustion is avoided, which is helpful to reduce the NO X generation; the "V"-shaped gas jet ejected from the first-stage linear nozzle collides and breaks with the jet ejected from the adjacent nozzle, which is helpful to the diffusion and mixing of the gas; the gas is ejected from the first-stage linear nozzle, the second-stage annular linear nozzle and the third-stage nozzle for graded combustion, which greatly suppresses the NO X generation and realizes low NO X combustion; the negative pressure area in the root area of the second-stage annular linear nozzle entrains the flue gas, realizes the flue gas recirculation combustion, and also effectively reduces the NO X generation. With the present invention, when the combustion-supporting air is pure air, the NO X generation is less than 40 mg/m 3 ; when the combustion-supporting air is a mixture of air and combustion flue gas, the NO X generation is less than 20 mg/m 3 .
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是本发明的结构示意图；Fig. 1 is a schematic structural diagram of the present invention;
图2(a)是本发明的正面示意图；Fig. 2(a) is a front schematic diagram of the present invention;
图2(b)是本发明的剖面示意图；Fig. 2(b) is a cross-sectional schematic diagram of the present invention;
图3是一级燃烧头的结构示意图；Fig. 3 is a schematic diagram of the structure of a primary combustion head;
图4是本发明的原理示意图；Fig. 4 is a schematic diagram of the principle of the present invention;
图5(a)、图5(b)是一级线性喷嘴结构示意图及其喷射原理图。FIG. 5( a ) and FIG. 5( b ) are schematic diagrams of the structure of a primary linear nozzle and its injection principle diagram.
具体实施方式Detailed ways
下面结合附图对本发明进行进一步说明：The present invention will be further described below in conjunction with the accompanying drawings:
如图1、图2(a)、图2(b)所示，一种线性低氮燃气燃烧头，包括助燃风入口管2、燃气分配室3、一级燃烧头4、隔热层6、火焰筒9、二级环状线性喷嘴10、燃气入口管路14；As shown in FIG. 1 , FIG. 2 (a) and FIG. 2 (b), a linear low-nitrogen gas burner head comprises a combustion air inlet pipe 2, a gas distribution chamber 3, a primary burner head 4, a heat insulation layer 6, a flame tube 9, a secondary annular linear nozzle 10 and a gas inlet pipeline 14;
燃气分配室3与燃气入口管路14、一级燃烧头4和二级环状线性喷嘴10相连；燃气室外筒17筒壁上有燃烧机安装法兰5，整个线性低氮燃气燃烧器通过燃气分配室3的燃气室外筒17上的燃烧机安装法兰5与炉体相连；助燃风入口管2一端有风筒安装法兰1，整个线性低氮燃气燃烧器通过助燃风入口管2上的风筒安装法兰1与助燃风机或风道相连。The gas distribution chamber 3 is connected to the gas inlet pipeline 14, the first-level combustion head 4 and the second-level annular linear nozzle 10; a burner mounting flange 5 is provided on the wall of the outer cylinder 17 of the gas chamber, and the entire linear low-nitrogen gas burner is connected to the furnace body through the burner mounting flange 5 on the outer cylinder 17 of the gas distribution chamber 3; a wind duct mounting flange 1 is provided at one end of the combustion-supporting air inlet pipe 2, and the entire linear low-nitrogen gas burner is connected to the combustion-supporting fan or air duct through the wind duct mounting flange 1 on the combustion-supporting air inlet pipe 2.
燃气分配室3包括左端板16、燃气室外筒17、右端板18；助燃风入口管2连接火焰筒9组成筒形结构，助燃风入口管2、火焰筒9同轴且直径相同；燃气分配室3为环状柱形容腔，燃气室外筒17及两端的左端板16、右端板18安装在助燃风入口管2、火焰筒9组成的筒形结构上，形成环状柱形容腔；燃气室外筒17为圆柱形钢筒；左端板16在炉体外，为圆环形盖板；右端板18在炉内，为环形盖板，右端板上某一圆周上开有若干均布的孔，用于安装二级环状线性喷嘴10；燃气分配室3与火焰筒9之间，填充隔热材料即隔热层6进行隔热处理。二级环状线性喷嘴10布置在燃气分配室的右端板18上，右端板18呈环状布置，每枝喷枪轴线与燃烧器中心线呈5°～15°范围内的一固定夹角。二级环状线性喷嘴10的喷孔直径为4mm左右，喷嘴流速为60m/s～80m/s(最大燃烧负荷下)，喷嘴数量按流量计算确定。The gas distribution chamber 3 includes a left end plate 16, a gas chamber outer cylinder 17, and a right end plate 18; the combustion-supporting air inlet pipe 2 is connected to the flame tube 9 to form a cylindrical structure, and the combustion-supporting air inlet pipe 2 and the flame tube 9 are coaxial and have the same diameter; the gas distribution chamber 3 is an annular cylindrical cavity, and the gas chamber outer cylinder 17 and the left end plate 16 and the right end plate 18 at both ends are installed on the cylindrical structure composed of the combustion-supporting air inlet pipe 2 and the flame tube 9 to form an annular cylindrical cavity; the gas chamber outer cylinder 17 is a cylindrical steel cylinder; the left end plate 16 is outside the furnace body and is a circular cover plate; the right end plate 18 is inside the furnace and is an annular cover plate, and a number of evenly distributed holes are opened on a certain circumference of the right end plate for installing a secondary annular linear nozzle 10; between the gas distribution chamber 3 and the flame tube 9, a heat insulation material, i.e., a heat insulation layer 6, is filled for heat insulation treatment. The secondary annular linear nozzle 10 is arranged on the right end plate 18 of the gas distribution chamber. The right end plate 18 is arranged in an annular shape. The axis of each spray gun forms a fixed angle within the range of 5° to 15° with the center line of the burner. The diameter of the spray hole of the secondary annular linear nozzle 10 is about 4 mm, the nozzle flow rate is 60m/s to 80m/s (under maximum combustion load), and the number of nozzles is determined by flow calculation.
如图1、图3所示，一级燃烧头4包括燃气分配弯管15、扩散盘13、一级线性喷嘴12、三级喷嘴11、点火电极7和火焰探测杆8。一级燃烧头4由燃气分配弯管15、扩散盘13、一级线性喷嘴12、三级喷嘴11组成，并布置点火电极7和火焰探测杆8。燃气分配弯管15与燃气分配室3相连，弯管出口段与燃烧器中心线同轴，出口端用圆形盖板封住，盖板上开有若干小孔，即三级喷嘴11。在靠近燃气分配弯管出口端一处圆周方向上均布开8～12个圆孔，用于安装一级线性喷嘴12；每枝一级线性喷嘴12沿轴线方向上开有两排喷气孔，每排孔呈一字形排列，在一级线性喷嘴12纵向截面上，两排孔中心与圆柱圆心的连线之间的夹角呈“V”形90°夹角布置，各一级线性喷嘴12的出口端用无孔盖板封堵。扩散盘13紧贴一级线性喷嘴12，安装在燃气分配弯管15上，扩散盘13上开有若干通风小孔。燃气分配弯管15上设置安装座，通过夹板用于固定点火电极7和火焰探测杆8。隔热层6隔热材料为硅酸铝纤维棉。As shown in Figures 1 and 3, the primary combustion head 4 includes a gas distribution elbow 15, a diffusion disk 13, a primary linear nozzle 12, a tertiary nozzle 11, an ignition electrode 7 and a flame detection rod 8. The primary combustion head 4 is composed of a gas distribution elbow 15, a diffusion disk 13, a primary linear nozzle 12, a tertiary nozzle 11, and an ignition electrode 7 and a flame detection rod 8 are arranged. The gas distribution elbow 15 is connected to the gas distribution chamber 3, the outlet section of the elbow is coaxial with the center line of the burner, and the outlet end is sealed with a circular cover plate, and a number of small holes, i.e., the tertiary nozzle 11, are opened on the cover plate. 8 to 12 circular holes are evenly distributed in the circumferential direction near the outlet end of the gas distribution elbow for installing the primary linear nozzle 12; each primary linear nozzle 12 has two rows of jet holes along the axial direction, and each row of holes is arranged in a straight line. On the longitudinal section of the primary linear nozzle 12, the angle between the line connecting the centers of the two rows of holes and the center of the cylinder is arranged in a "V" shape at a 90° angle, and the outlet end of each primary linear nozzle 12 is blocked with a non-hole cover plate. The diffusion plate 13 is close to the primary linear nozzle 12 and is installed on the gas distribution elbow 15. A plurality of ventilation holes are opened on the diffusion plate 13. A mounting seat is provided on the gas distribution elbow 15, and is used to fix the ignition electrode 7 and the flame detection rod 8 through a clamping plate. The insulation material of the heat insulation layer 6 is aluminum silicate fiber wool.
如图4、图5(a)、图5(b)所示，燃气自燃气入口管路14进入燃气分配室3后，分为两部分：约占总气量85％的一部分燃气进入燃气分配弯管15后经再次分配至一级线性喷嘴12和三级喷嘴喷11出，约占总气量15％的另一部分则分配至二级环状线性喷嘴10喷出。进入燃气分配弯管15的燃气，约占总气量80％的一部分燃气以60m/s～80m/s(最大燃烧负荷下)的流速从一级线性喷嘴12两排线性气孔内呈“V”形喷出，两排气流分别与相邻喷嘴喷出的气流进行猛烈撞击，燃气在此被迅速破碎、扩散，而后与从扩散盘小孔穿透过来的约占总风量10％的一次风进行部分混合，最后与扩散盘13外流速为30m/s～40m/s(最大燃烧负荷下)的二次风进行再次强烈扩散、混合，经扩散、混合后的可燃混合物在火焰筒9内着火燃烧。从一次线性喷嘴12喷出的燃气在火焰筒9内过氧条件下充分燃烧，同时，从三级喷嘴11喷出的燃气也参与燃烧，形成少量还原性气氛，生成碳氢化合物基团，与燃烧产物的NOX进行部分还原反应，NOX被还原为N2。As shown in Figures 4, 5(a) and 5(b), after the gas enters the gas distribution chamber 3 from the gas inlet pipeline 14, it is divided into two parts: a part of the gas, which accounts for about 85% of the total gas volume, enters the gas distribution elbow 15 and is redistributed to the first-level linear nozzle 12 and the third-level nozzle 11 for spraying, and another part, which accounts for about 15% of the total gas volume, is distributed to the second-level annular linear nozzle 10 for spraying. The gas entering the gas distribution elbow 15, which accounts for about 80% of the total gas volume, is ejected in a "V" shape from the two rows of linear air holes of the first-stage linear nozzle 12 at a flow rate of 60m/s to 80m/s (under the maximum combustion load). The two exhaust airflows collide violently with the airflows ejected from the adjacent nozzles, and the gas is quickly broken and diffused here, and then partially mixed with the primary air that accounts for about 10% of the total air volume that penetrates from the small holes of the diffusion disk, and finally diffused and mixed strongly again with the secondary air with a flow rate of 30m/s to 40m/s (under the maximum combustion load) outside the diffusion disk 13. The combustible mixture after diffusion and mixing ignites and burns in the flame tube 9. The gas ejected from the first-stage linear nozzle 12 is fully burned under the oxygen-rich condition in the flame tube 9. At the same time, the gas ejected from the third-stage nozzle 11 also participates in the combustion, forming a small amount of reducing atmosphere, generating hydrocarbon radicals, and partially reducing the NO X in the combustion product, and NO X is reduced to N 2 .
火焰筒9内的燃烧火焰喷出火焰筒后，再与二级环状线性喷嘴10的燃气进行混合燃烧。在此区域，局部为还原性气氛，生成大量碳氢化合物基团，与火焰筒燃烧区域生成的NOX进行还原反应，NOX被还原为N2。After the combustion flame in the flame tube 9 is ejected from the flame tube, it is mixed and burned with the fuel gas from the secondary annular linear nozzle 10. In this area, the local reducing atmosphere generates a large number of hydrocarbon radicals, which react with the NOx generated in the flame tube combustion area, and the NOx is reduced to N2 .
在火焰筒9出口，由于燃烧火焰的高速喷出，在二级环状线性喷嘴10根部区域产生一个负压区域，将炉膛内的部分低温烟气卷吸至此，再次参与燃烧，一方面降低火焰温度峰值，另一方面降低燃烧混合物中的氧浓度，从而有效降低NOX的生成量。At the outlet of the flame tube 9, due to the high-speed ejection of the combustion flame, a negative pressure area is generated in the root area of the secondary annular linear nozzle 10, and part of the low-temperature flue gas in the furnace is sucked here to participate in the combustion again. On the one hand, the peak value of the flame temperature is reduced, and on the other hand, the oxygen concentration in the combustion mixture is reduced, thereby effectively reducing the generation of NOX .
本发明未详细说明部分属于本领域技术人员公知常识。Parts of the present invention that are not described in detail belong to common knowledge among those skilled in the art.
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| CN111649324B (en) * | 2020-06-12 | 2023-01-13 | 烟台龙源电力技术股份有限公司 | Burner and boiler |
| CN113757665A (en) * | 2021-09-23 | 2021-12-07 | 深圳市佳运通电子有限公司 | A gas burner system and its working method |
| CN115405926B (en) * | 2022-08-02 | 2025-08-08 | 上海齐耀热能工程有限公司 | Linear flue burner for flue supplementary burning |
| CN115978534A (en) * | 2022-12-09 | 2023-04-18 | 深圳市佳运通电子有限公司 | Ultralow-nitrogen combustor and combustion method thereof |
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Application publication date: 20180112 Assignee: Shanghai Daiding Energy Saving Equipment Co.,Ltd. Assignor: SHANGHAI DAIDING INDUSTRIAL EQUIPMENT Co.,Ltd. Contract record no.: X2025980015825 Denomination of invention: A linear low nitrogen gas burner Granted publication date: 20240604 License type: Open License Record date: 20250731 |
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