A water-cooled premix integrated water cavity combustion head and a combustion fire bar assembly used thereby

Abstract

The utility model provides a kind of water-cooled premix integrated water cavity's combustion head and the combustion fire row assembly used by it, comprising: mixed gas cover, it has premix cavity, air inlet end and mixed gas outlet end;Combustion fire row assembly is fixedly connected in the mixed gas outlet end, and this combustion fire row assembly includes: a) integrated cooling shell, which forms sealed connection with mixed gas outlet end, and the cooling shell is provided with continuous cooling cavity inside, and the shell is provided with cooling medium inlet and cooling medium outlet;B) multiple gas injection units, array type is arranged between the front and rear sidewalls of cooling shell, each gas injection unit includes: b1) socket type mounting hole, it is through setting along the thickness direction of cooling shell;B2) gas guide pipe, both ends are respectively sealed and connected in socket type mounting hole.Gas guide pipe's gas outlet size and the arrangement density of gas on cooling shell can be adjusted as required, and then the fire range and the fire size are adjusted as required.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and in particular to a burner head with a water-cooled premixed integrated water chamber and the combustion burner assembly used therein. Background Technology

[0002] Water-cooled premixed burners are a new type of combustion device developed based on premixed combustion technology. Premixed combustion refers to the pre-mixing of fuel and oxidizer before they enter the combustion chamber. This combustion method has advantages such as fast reaction speed, uniform temperature distribution, and low nitrogen oxide (NOx) formation. While traditional fully premixed burners feature high-efficiency combustion and low NOx emissions, they suffer from poor flame stability, susceptibility to backfire, and a fine surface pore structure that easily becomes clogged. To address these issues, water-cooled premixed burners introduce cooling water technology. This cooling water removes heat from the flame root, lowering the flame temperature, thereby suppressing NOx formation and improving combustion efficiency.

[0003] The development of water-cooled premixed burners is closely related to national energy conservation and emission reduction policies. With increasingly stringent environmental requirements, traditional free-flame burners and diffusion burners can no longer meet the demands for low-NOx emissions; therefore, developing efficient and clean low-NOx burners has become an industry trend. Water-cooled premixed burners offer ultra-low NOx emissions (as low as 15-50 mg / m³). 3 With its advantages such as high thermal efficiency, it has become the preferred technology in many fields such as industrial heating equipment, home heating systems, and power equipment.

[0004] Currently, most of the burners on the market are tube bundle type water-cooled premixed burners (such as Chinese patent CN211854001U_A water-cooled fully premixed gas ultra-low NOx flat burner, CN111156508B_A fully premixed gas water-cooled wall combustion device, and CN118935721A_A water-cooled fully premixed flat plate low NOx burner, etc.), which use multiple spaced water-cooled tubes to form a water-cooled tube screen to cool the combustion chamber, such as Figure 17As shown, water-cooled tube panels consist of multiple long vertical tubes. These long vertical tubes are prone to deformation under prolonged boiler use. After deformation, the gas outlet gaps between adjacent vertical tubes cannot be guaranteed to be uniform, leading to backfire in areas with excessively large gaps and uneven overall combustion. Furthermore, due to the limited diameter of the vertical tubes, the gas outlet gaps between adjacent tubes are short, making the cooling section susceptible to backfire. Extending the cooling section would require adding at least one more row of water-cooled tube panels, wasting materials and increasing the probability of deformation and other malfunctions due to the numerous long vertical tubes. On the other hand, because the water-cooled tube panel is installed by arranging multiple vertical tubes at intervals, the adjustment range of its gap size is limited due to combustion quality considerations. The gas outlet combustion range is elongated vertically, essentially filling the entire water-cooled tube panel, making it difficult to adjust the combustion range and the gas outlet gaps formed by adjacent vertical tubes. Utility Model Content

[0005] To address the above technical problems, this utility model provides a burner head for a water-cooled premixed integrated water chamber and its combustion burner assembly. The burner utilizes the entire cooling housing as a cooling screen, with a continuous cooling chamber inside. The cooling section is a gas conduit that runs through the cooling housing, and the entire gas conduit is immersed in the cooling medium. This results in a longer cooling section, reducing the risk of backfire. Furthermore, for the same specifications, the gas conduit is significantly shorter than the vertical pipe described in the prior art, and the fact that the gas conduit is entirely immersed in the cooling medium makes it less prone to deformation. The inner diameter of the gas conduit can be adjusted as needed, as can its arrangement, distribution, and layout. The gas conduit also provides support for the cooling housing.

[0006] This effectively solves the technical problems described in the background section.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A combustion head with a water-cooled premixed integrated water chamber, characterized in that it comprises:

[0009] A mixing chamber having a premixing chamber, an air inlet, and a mixed gas outlet;

[0010] A combustion burner assembly is fixedly connected to the gas mixture outlet end, and the combustion burner assembly includes:

[0011] a) An integrated cooling housing that forms a sealed connection with the gas mixture outlet, the cooling housing having a continuous cooling chamber inside, the cooling chamber having a cooling medium channel communicating with the outside;

[0012] b) Multiple gas injection units are arranged in an array between the front and rear side walls of the cooling housing, and each gas injection unit includes:

[0013] b) A socket-type mounting hole is provided, which extends through the thickness of the cooling housing;

[0014] b) Gas conduit, with both ends sealed and connected to socket-type mounting holes.

[0015] Furthermore, the socket-type mounting holes are distributed in a multi-row, multi-column matrix, and the central axes of the mounting holes in adjacent rows form an interlaced arrangement in the vertical plane.

[0016] Furthermore, the cooling housing is a flat rectangular body with a thickness-to-vertical-length ratio between 1:8 and 1:10.

[0017] Furthermore, the axial end of the socket-type mounting hole is provided with a radially expanding conical surface, which forms a V-shaped welding groove with the outer wall of the gas conduit. A continuous annular fillet weld is performed through the V-shaped welding groove to form a sealed pressure-bearing connection structure for the gas conduit.

[0018] Furthermore, the cooling housing has an outwardly protruding mounting ridge on the gas-mixing coupling end face that surrounds the socket-type mounting hole, and the mounting ridge forms a flange-sealed connection with the gas-mixing outlet end.

[0019] Furthermore, the cooling medium channel is: a cooling medium inlet connected to the cooling chamber provided in the housing and a cooling medium outlet located on the side wall of the housing, wherein the vertical height of the cooling medium outlet is higher than that of the cooling medium inlet; or the cooling medium channel is: at least one opening connected to the continuous cooling chamber, which is located on the cooling housing outside the area enclosed by multiple gas injection units and the area covered by the mixing gas shroud.

[0020] Furthermore, an eccentrically expanding flow channel is formed between the air inlet and the air outlet of the mixing hood, wherein the axis of the air inlet is offset to one side relative to the axis of the air outlet.

[0021] Furthermore, the integrated cooling housing includes:

[0022] The substrate has a peripheral sealing surface;

[0023] The top cover assembly consists of a Π-shaped frame structure formed by four side uprights and a top plate. Each side upright has an outwardly inclined bevel at its bottom end. The bevel and the sealing surface of the supporting substrate form a butt weld, which together enclose a closed cooling cavity.

[0024] Furthermore, a temperature measuring tube seat is provided on the coupling end face of the cooling shell mixed gas, which is placed outside the mixed gas shroud. The temperature measuring tube seat is used to install a temperature measuring sensor to detect the temperature of the cooling medium inside the cooling shell; the two ends of the gas conduit extend out of the side of the cooling shell.

[0025] A combustion burner assembly, characterized in that it comprises:

[0026] The combustion chamber assembly includes:

[0027] a) An integrated cooling housing, wherein the cooling housing has a continuous cooling chamber inside, and the cooling chamber has a cooling medium channel communicating with the outside;

[0028] b) Multiple gas injection units are arranged in an array between the front and rear side walls of the cooling housing, and each gas injection unit includes:

[0029] b) A socket-type mounting hole is provided, which extends through the thickness of the cooling housing;

[0030] b) A gas conduit, with both ends sealed and connected to socket-type mounting holes. This sealed connection constitutes a seal on the mounting holes.

[0031] Furthermore, the cooling housing is circumferentially covered with a connecting flange.

[0032] The water-cooled premixed combustor structure of this patent application has significant advantages in thermal efficiency, structural reliability, and safety performance through multi-level innovative design. The specific technical effects are analyzed as follows:

[0033] 1. The integrated cooling shell adopts a flat rectangular structure (thickness to vertical length ratio 1:8-1:10), increasing the ratio of cooling area to flame contact surface, ensuring that the gas injection units on the front and rear side walls of the shell are entirely under water-cooled protection. The staggered matrix gas injection units ensure that each gas duct outlet has a cooling surface around its perimeter, enhancing the cooling effect. The combination of the integrated cooling shell and the gas ducts connected to the front and rear side walls of the shell allows for adjustment of the gas duct outlet size and gas density on the cooling shell, thereby adjusting the flame range and flame size as needed.

[0034] 2. The upper cover assembly of the Π-shaped frame is welded to the supporting substrate with an outward-sloping bevel to form a closed cooling chamber. Combined with the vertical height difference between the bottom cooling medium inlet and the top outlet, gravity drives the natural convection of the cooling medium. Compared to traditional single-pipe segmented cooling structures, this enhances overall cooling efficiency and effectively avoids material deformation or ablation caused by localized overheating.

[0035] 3. The eccentrically expanding flow channel, by offsetting the intake end axis, guides the mixed airflow towards the combustion chamber assembly, creating turbulence. This, combined with the flow direction of the cooling medium in the cooling shell, forms counter-current heat transfer, enhancing the convective heat transfer coefficient. This significantly reduces the surface temperature of the burner head, thereby reducing the generation of nitrogen oxides.

[0036] 4. The multi-row, multi-column matrix distribution of the socket-type mounting holes adopts a staggered arrangement structure, making the flame distribution more uniform and avoiding heat superposition between adjacent injection units. The radially expanding conical surface and V-shaped welding bevel design achieve a sealed connection between the gas conduit and the shell through continuous annular fillet welds, resulting in uniform stress distribution in the welds and improved pressure resistance.

[0037] 5. The temperature sensing tube is directly installed on the gas-mixed coupling end face of the cooling shell. The external temperature sensor monitors the temperature of the cooling medium. Combined with the vertical high-position design of the cooling medium outlet, it can determine in real time whether the cooling system has failed.

[0038] 6. The flattened design reduces the thickness of the burner head, making it suitable for installations in confined spaces in industrial boilers. The socket-type mounting hole design allows for quick replacement of individual gas conduits.

[0039] 7. In summary, this patent achieves a balance between efficient cooling, precise combustion control, and high reliability through multi-dimensional synergistic innovation of the water cooling system and combustion structure, representing a significant technological breakthrough in the field of industrial combustion equipment. Attached Figure Description

[0040] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is the front view of the present utility model;

[0042] Figure 2 This is a perspective view of the present invention;

[0043] Figure 3 This is a two-dimensional view of the present invention.

[0044] Figure 4 This is a sectional perspective view of the present invention;

[0045] Figure 5 In this utility model Figure 1 A sectional view;

[0046] Figure 6 This is a perspective view of the present invention without the mixing gas cover;

[0047] Figure 7 This is a perspective view of the integrated cooling housing of this utility model;

[0048] Figure 8 This is a perspective view of the hybrid gas hood of this utility model;

[0049] Figure 9 This is a perspective view of the gas conduit of this utility model;

[0050] Figure 10 This is an exploded view of the present invention;

[0051] Figure 11 This is a front view with dimensions of a specific embodiment of the product of this utility model;

[0052] Figure 12 for Figure 10 Sectional view along axis AA;

[0053] Figure 13 for Figure 11 A rear view with dimensions is shown for a specific implementation of the product;

[0054] Figure 14 for Figure 11 BB-direction sectional view;

[0055] Figure 15 for Figure 14 Enlarged view of section I;

[0056] Figure 16 for Figure 1 Enlarged view of section II;

[0057] Figure 17 This is a schematic diagram of a burner composed of water-cooled tube bundles in the prior art;

[0058] Figure 18 This is a structural diagram of an embodiment of the present invention where the cooling chamber is connected to the boiler hot coal and water chamber;

[0059] above Figures 11-16 Medium length dimensions are measured in millimeters.

[0060] Explanation of reference numerals in the attached drawings: Mixing gas hood 1, premixing chamber 11, mixed gas outlet 12, inlet 13, cooling shell 21, cooling chamber 211, cooling medium inlet 212, cooling medium outlet 213, socket mounting hole 214, gradually expanding conical surface 214a, V-shaped welding bevel 214b, mounting ridge 215, bearing base plate 216, sealing surface 216a, top cover assembly 217, side upright plate 217a, top plate 217b, outwardly inclined bevel 217c, butt weld 218, cooling medium upper inlet 2101, cooling medium lower inlet 2102, gas injection unit 22, gas conduit 221, annular fillet weld 222, connecting flange 3, temperature measuring tube seat 4; vacuum boiler 5, heat medium water chamber 54, mounting port 51, heat medium water upper inlet 52, heat coal water lower inlet 53. Detailed Implementation

[0061] The following will refer to the appendix in the embodiments of this utility model. Figure 1-18The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort, as well as any combination of embodiments in this embodiment, are within the protection scope of this utility model.

[0062] This utility model provides a burner head for a water-cooled premixed integrated water chamber and a combustion burner assembly used therein. For example... Figure 1-4 As shown, it includes:

[0063] The mixing hood 1 has a premixing chamber 11, an inlet end 13, and a mixed gas outlet end 12. In this embodiment, a mixture of natural gas and air can be introduced into the premixing chamber 11 through the inlet end 13. The gas in the premixing chamber 11 is mixed again and then discharged from the mixed gas outlet end 12.

[0064] Combustion burner assembly 2 is fixedly connected to the gas mixture outlet 12, and the combustion burner assembly includes:

[0065] a) An integrated cooling housing 21 is sealed to the gas outlet 12 of the mixed gas. The cooling housing 21 has a continuous cooling chamber 211 inside. The housing has a cooling medium inlet 212 that communicates with the cooling chamber 211 and a cooling medium outlet 213 located at the top. The vertical height of the cooling medium outlet 213 is higher than that of the cooling medium inlet 212.

[0066] b) Multiple gas injection units 22 are arranged in an array between the front and rear side walls of the cooling housing 21, and each gas injection unit 22 includes:

[0067] b1) A socket-type mounting hole 214 is provided through the thickness direction of the cooling housing 21;

[0068] b2) Gas conduit 221, both ends of which are sealed and connected to socket mounting holes 214.

[0069] The cooling housing 21 of this invention is integrally formed, with a continuous cooling chamber 211 inside. The cooling chamber 211 is provided with a cooling medium inlet 212 and a cooling medium outlet 213 communicating with it. Cooling medium (e.g., cooling water) enters the cooling chamber 211 through the cooling medium inlet 212. In this embodiment, the cooling medium inlet is located at the bottom of the cooling chamber 211, i.e., the cooling housing 21 faces the bottom of the side wall of the mixing shroud 1 and is located outside the range of the mixing shroud 1. The cooling medium outlet 213 is located at the top of the side wall of the cooling chamber 211, i.e., the cooling housing 21 faces the top of the side wall of the mixing shroud and is located outside the range of the mixing shroud 1. When the cooling medium enters the cooling chamber 211, it flows upward naturally until it flows out from the cooling medium outlet 213, forming a circulating cooling system. In this embodiment, the cooling medium outlet 213 is at least higher than the height of the gas injection unit 22.

[0070] Multiple gas injection units 22 are arranged between the front and rear side walls of the cooling housing 21. Each injection unit 22 includes a socket-type mounting hole 214 extending along the thickness direction of the cooling housing 21 and a gas conduit 221 with both ends sealed and connected to the mounting hole. The gas conduit 221 is entirely placed in the cooling medium within the cooling chamber 211, allowing the cooling water to provide omnidirectional cooling. The mixed gas forms a high pressure in the cavity between the mixing gas shroud 1 and the cooling housing, and is ejected from the gas conduit 221. An ignition device is provided on the side of the cooling housing 21 facing away from the mixing gas shroud to ignite the ejected gas-air mixture. This invention ejects the gas-air mixture through multiple cooled gas conduits 211. The nozzle diameter of the gas conduits themselves can be replaced or adjusted as needed, and the arrangement density and pattern of the gas conduits can also be adjusted as required, offering a high degree of freedom. The ejected flame area is entirely within the water-cooled wall formed by the cooling housing, enhancing the water-cooling effect, reducing the combustion temperature, and reducing the generation of nitrogen oxides.

[0071] The gas conduit 221 extends out of the sides of the cooling housing 21 at both ends, forming unconstrained ends, which allows the conduit to expand freely along the axial direction at high temperatures, avoiding the accumulation of internal stress caused by the difference in thermal expansion coefficients between the housing and the conduit materials.

[0072] As one embodiment of this utility model, such as Figure 1 and 9As shown, the socket-type mounting holes 214 are arranged in a multi-row, multi-column matrix, with the mounting holes in adjacent rows staggered. This staggered arrangement of the socket-type mounting holes also results in a staggered arrangement of the gas conduits 221, increasing the area surrounded by the cooling walls of the cooling shell 21 around each gas conduit 221 and enhancing the cooling effect. The cross-section of the gas conduit 221's opening is an arc at both ends and a rectangle between the two arcs, giving the gas conduit 221 an overall flat shape. This utility model's integrated cooling chamber, compared to a single-pipe arrangement cooling method, features a large, integrated water chamber structure.

[0073] As one embodiment of this utility model, such as Figure 7 As shown, the cooling shell 21 of this utility model is a flat rectangular body with a thickness-to-vertical length ratio between 1:8 and 1:10. Specifically, 1:8, 1:9, or 1:10 can be selected. The flat design reduces the thickness of the burner head, making it suitable for the limited installation space of industrial boilers.

[0074] As one embodiment of this utility model, such as Figure 4 , 5 As shown in Figure 15, radially expanding conical surfaces 214a are provided at both axial ends of the socket mounting hole 214. A V-shaped welding groove 214b is formed between the conical surface and the outer wall of the gas conduit 221. A continuous annular fillet weld 222 is performed at the V-shaped welding groove 214b to form a sealed pressure-bearing connection structure for the gas conduit 221.

[0075] In this embodiment, the V-shaped welding groove 214b formed by the conical surface and the outer wall of the gas conduit increases the weld penetration, allowing the weld metal to fully fill the groove gap and form a continuous annular sealing interface. 360° annular welding eliminates localized incomplete fusion defects and prevents the propagation of microcracks caused by thermal stress concentration. Conical surfaces are provided at both ends of the mounting hole along the axial direction, ensuring that the welding stress between the gas conduit 221 and the shell is evenly distributed along the conical surface, avoiding eccentric deformation caused by unilateral welding. The gas conduit is directly welded after being inserted into the mounting hole, eliminating the assembly steps of flanges or threaded connections. The geometric consistency of the V-groove facilitates robot welding path programming, resulting in stable weld formation quality.

[0076] As one embodiment of this utility model, such as Figure 4 , 6 As shown in Figure 10, the cooling housing 21 has an outwardly protruding mounting ridge 215 on the gas-mixing coupling end face, which surrounds the socket mounting hole 214. The mounting ridge 215 covers the area formed by the socket mounting hole 214, and the mounting ridge 215 forms a flange-sealed connection with the gas-mixing outlet end 12. A connecting flange is provided at both the mounting ridge 215 and the gas-mixing outlet end. The two flanges are connected by bolts and nuts, and sealing gaskets are pressed onto the mating surfaces of the two flanges to form a flange-sealed connection.

[0077] In this embodiment, the convex ridge surrounds the mounting holes 214 of all gas conduits 221, forming a continuous annular sealing band that physically isolates the mixing chamber from the external environment, preventing gas or cooling medium leakage. The mounting convex ridge 215 is pressed against the gas outlet end 12 of the mixed gas via a flange (e.g., bolted connection), combined with a sealing gasket, to form a sealing barrier. Due to the different materials (e.g., stainless steel and heat-resistant alloy) of the cooling housing 21 and the mixing gas shroud 1, the difference in their coefficients of thermal expansion may cause displacement at the connection interface. The flexible protrusion design of the mounting convex ridge 215 can absorb some thermal deformation, preventing cracking of the sealing surface. The convex ridge surrounds the area of ​​densely distributed socket-type mounting holes 214 of the gas conduits, forming an annular reinforcing frame that resists housing deformation caused by combustion vibration and gas injection reaction force.

[0078] As one embodiment of this utility model, such as Figure 8 As shown, an eccentrically expanding flow channel 14 is formed between the air inlet end 13 and the air outlet end 12 of the mixing air hood 1, wherein the axis of the air inlet end is offset to one side relative to the axis of the air outlet end.

[0079] As one embodiment of this utility model, such as Figure 7 and 10 As shown, the integrated cooling housing 21 includes:

[0080] The substrate 216 has a peripheral sealing surface 216a;

[0081] The top cover assembly 217 consists of a Π-shaped frame structure formed by four side uprights 217a and a top plate 217b. Each side upright 217a has an outward-sloping bevel 217c at its bottom end. These bevels form a butt weld 218 with the sealing surface 216a of the supporting substrate, collectively enclosing a closed cooling chamber 211. The outward-sloping bevel design widens the weld root gap, ensuring full penetration of the welding material and forming a full-thickness fusion zone, avoiding incomplete penetration defects. The Π-shaped frame formed by the four side uprights 217a and the top plate 217b is welded to the periphery of the sealing surface 216a of the substrate 216 through the outward-sloping bevel, forming a continuous sealing boundary. The outward-sloping design of the welding bevels between the side uprights 217a and the substrate 216 allows for axial thermal expansion displacement, reducing the peak thermal stress of the weld.

[0082] As one embodiment of this utility model, the cooling shell 21 is circumferentially covered with a connecting flange 3.

[0083] This connecting flange facilitates the connection of this invention to external equipment such as boilers. Furthermore, the connecting flange 3 fully covers the circumference of the cooling shell 21, forming a closed annular reinforcing rib, which significantly improves the shell's bending and torsional stiffness, especially suppressing shell deformation when subjected to gas injection reaction force or external vibration.

[0084] As one embodiment of this utility model, such as Figure 3 As shown, a temperature measuring tube seat 4 is provided on the gas-mixing coupling end face of the cooling housing 21, which is placed outside the gas-mixing cover 1. The temperature measuring tube seat 4 is used to install a temperature sensor to detect the temperature of the cooling medium inside the cooling housing 21.

[0085] As one embodiment of this utility model, such as Figure 18 As shown, the cooling medium channel in this embodiment is: at least one opening that connects to a continuous cooling chamber (211), which is located on the cooling housing (21) outside the area enclosed by multiple gas injection units (22) and the area covered by the mixing gas shroud (1).

[0086] In this embodiment, a cooling medium upper inlet 2101 is provided on the top surface of the cooling shell 21, and a cooling medium lower inlet 2102 is provided on the bottom surface of the cooling shell 21. Both the cooling medium upper inlet 2101 and the cooling medium lower inlet 2102 are connected to the cooling chamber 211. A mounting port 51 extending through the thickness direction is provided on the side wall of the heat transfer medium water chamber 54 of the vacuum boiler 5. The mounting port 51 is sealed on all sides. A heat transfer medium water upper inlet 52 and a heat transfer medium water lower inlet 53 are provided on the upper and lower side walls of the mounting port 51, respectively. During installation, the cooling housing 21 is placed inside the mounting port 51. The upper port 2101 of the cooling medium of the cooling housing 21 corresponds to the upper port 52 of the heat medium water, and the lower port 2102 of the cooling medium of the cooling housing 21 corresponds to the lower port 53 of the heat medium water. Then, around the joint of the upper and lower ports, the upper and lower sidewalls of the cooling housing 21 are welded to the upper and lower sidewalls of the mounting port 51, respectively, to form a seal and fixation for the upper or lower port.

[0087] In this embodiment, since the side wall of the vacuum boiler 5 is provided with a heat medium water chamber 54, the cooling shell 21 is connected to the heat medium water chamber 54 through the upper cooling medium port 2101 and the lower cooling medium port 2102 provided at its top and bottom ends. The heat medium water in the heat medium water chamber 54 is directly used to cool the gas conduit 221 in the cooling shell 21 and the cooling shell 21, eliminating the need for a separate cold water circulation system.

Claims

1. A combustion head with a water-cooled premixed integrated water chamber, characterized in that, include: A mixing hood (1) has a premixing chamber (11), an air inlet (13) and a mixed gas outlet (12). Combustion burner assembly (2), fixedly connected to the gas mixture outlet (12), the combustion burner assembly includes: a) An integrated cooling housing (21) is sealed to the gas outlet (12) of the mixed gas. The cooling housing (21) has a continuous cooling chamber (211) inside, and the cooling chamber (211) has a cooling medium channel communicating with the outside. b) Multiple gas injection units (22) are arranged in an array between the front and rear side walls of the cooling housing (21), and each gas injection unit (22) includes: b1) A socket-type mounting hole (214) is provided through the thickness direction of the cooling shell (21); b2) Gas conduit (221), both ends of which are sealed and connected to the socket mounting hole (214).

2. The combustion head of the water-cooled premixed integrated water chamber according to claim 1, characterized in that: The socket-type mounting holes (214) are distributed in a multi-row, multi-column matrix, and the central axes of the mounting holes in adjacent rows form an interlaced arrangement in the vertical plane.

3. The combustion head of the water-cooled premixed integrated water chamber according to claim 2, characterized in that: The cooling housing (21) is a flat rectangular body with a thickness to vertical length ratio between 1:8 and 1:

10.

4. The combustion head of the water-cooled premixed integrated water chamber according to claim 1, characterized in that: The axial end of the socket-type mounting hole (214) is provided with a radially expanding conical surface (214a), which forms a V-shaped welding groove (214b) with the outer wall of the gas conduit (221). A continuous annular fillet weld (222) is implemented through the V-shaped welding groove (214b) to form a sealed pressure-bearing connection structure for the gas conduit (221).

5. The combustion head of the water-cooled premixed integrated water chamber according to claim 1, characterized in that: The cooling housing (21) has an outwardly protruding mounting ridge (215) surrounding the socket mounting hole (214) on the gas coupling end face. The mounting ridge (215) forms a flange sealing connection with the gas outlet end (12).

6. The combustion head of the water-cooled premixed integrated water chamber according to claim 1, characterized in that: The cooling medium channel is: a cooling medium inlet (212) of the housing connecting the cooling chamber (211) and a cooling medium outlet (213) placed on the side wall of the housing, wherein the vertical height of the cooling medium outlet (213) is higher than that of the cooling medium inlet (212); or the cooling medium channel is: at least one opening of the continuous cooling chamber (211) which is located on the cooling housing (21) outside the area enclosed by multiple gas injection units (22) and the area covered by the mixing gas shroud (1).

7. The combustion head of the water-cooled premixed integrated water chamber according to claim 1, characterized in that: An eccentric, gradually expanding flow channel (14) is formed between the air inlet end (13) and the air outlet end (12) of the mixing air hood (1), wherein the axis of the air inlet end is offset to one side relative to the axis of the air outlet end.

8. The combustion head of the water-cooled premixed integrated water chamber according to claim 1, characterized in that: The integrated cooling housing (21) includes: The substrate (216) has a peripheral sealing surface (216a). The top cover assembly (217) consists of four side uprights (217a) and a top plate (217b) forming a Π-shaped frame structure. Each side upright (217a) has an outwardly inclined bevel (217c) at its bottom end. The bevel and the sealing surface (216a) of the supporting substrate form a butt weld (218), which together enclose a closed cooling cavity (211).

9. The combustion head of the water-cooled premixed integrated water chamber according to claim 1, characterized in that: A temperature measuring tube seat (4) is provided on the gas-mixing coupling end face of the cooling housing (21) and placed outside the gas-mixing cover (1). The temperature measuring tube seat (4) is used to install a temperature sensor to detect the temperature of the cooling medium inside the cooling housing (21). The two ends of the gas conduit (221) extend out of the side of the cooling housing (21).

10. A combustion burner assembly, characterized in that, The combustion burner assembly (2) includes: a) An integrated cooling housing (21) has a continuous cooling chamber (211) inside, and the cooling chamber (211) has a cooling medium channel communicating with the outside. b) Multiple gas injection units (22) are arranged in an array between the front and rear side walls of the cooling housing (21), and each gas injection unit (22) includes: b1) A socket-type mounting hole (214) is provided through the thickness direction of the cooling shell (21); b2) Gas conduit (221), both ends of which are sealed and connected to the socket mounting hole (214).

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