Burner

Abstract

The present invention relates to a burner, which includes at least one cooling jacket. The cooling jacket includes a central channel and a cooling channel provided on the radially outer side of the central channel. One end of the cooling channel is provided with an end cover to form a closed structure. An absorbent structure is provided near the end cover in the cooling channel to absorb the thermal expansion of the cooling jacket, and a connecting member is also provided near the end cover in the cooling channel. The present invention cools through a jacket-type cooling channel arranged around the central channel, and an absorbent structure and a connecting member are provided near the end of the cooling channel. The absorbent structure can absorb the thermal expansion of the cooling jacket, solving the problem of damage caused by stress concentration due to extrusion at its end; through the restraint effect of the connecting member, the telescopic consistency of the cooling jacket can be ensured, the service life of the end cover can be extended, and a strong guarantee is provided for the safe, stable and long-term operation of the burner.

Description

Technical Field

[0001] The present invention relates to the technical field of gas combustion, and particularly to a burner. Background Art

[0002] Currently, in the field of high-temperature and high-pressure coal gasification, there is a common phenomenon that the heat-absorbing surface of the front cover of the burner is locally damaged during the operation of the coal gasification device, which seriously affects the safe, stable and long-term operation of the coal gasification device. In the burner, the thermal expansion lengths of different cooling water pipes are different, which easily causes the water separation component to squeeze the front cover, resulting in stress concentration on the front cover and causing damage, and causing bulging and cracking of the burner front cover. Especially for anthracite, due to its high calorific value, the temperature of the burner front cover is high, the stress required for the material is small, and the front cover is more likely to be damaged after being squeezed. Summary of the Invention

[0003] In view of the above problems existing in the prior art, the purpose of the present invention is to provide a burner, which can solve the problem of stress concentration and even damage of the end cover caused by the thermal expansion of pipe fittings.

[0004] To achieve the above purpose, the present invention provides a burner, including at least one cooling jacket, the cooling jacket includes a central channel and a cooling channel provided on the radial outer side of the central channel, one end of the cooling channel is provided with an end cover to form a closed structure, an expansion-absorbing structure is provided at a position close to the end cover in the cooling channel to absorb the thermal expansion of the cooling jacket, and a connecting member is further provided at a position close to the end cover in the cooling channel.

[0005] In some embodiments, the burner includes a plurality of cooling jackets, and the plurality of cooling jackets are nested in the radial direction of the burner to form a plurality of cooling channels.

[0006] In some embodiments, one side of the cooling jacket is provided with a cooling medium inlet, and the other side is provided with a cooling medium outlet, and the cooling channel is communicated with the cooling medium inlet and the cooling medium outlet; at least one feed port is further provided on the cooling jacket.

[0007] In some embodiments, the burner further includes at least one single-tube assembly.

[0008] In some embodiments, the single-tube assembly is detachably installed in the central channel, or installed on the outermost side of the burner, or installed between two adjacent cooling jackets.

[0009] In some embodiments, the cooling jacket includes an outer tube, a water separating tube, and an inner tube arranged in sequence from outside to inside. One end of the outer tube and one end of the inner tube are both connected to the end cover. A first cooling channel is formed between the inner tube and the water separating tube, and a second cooling channel is formed between the water separating tube and the outer tube. The water separating tube is at a certain distance from the end cover, and one end of the water separating tube is connected to the swelling structure. A flow guiding member is provided between the swelling structure and the end cover. The first cooling channel and the second cooling channel are communicated through the flow guiding member.

[0010] In some embodiments, the connecting member is a disc-shaped structure, and three connecting tubes penetrating through its upper and lower ends are provided on the disc-shaped structure to be respectively connected to the outer tube, the water separating tube, and the inner tube.

[0011] In some embodiments, the swelling structure includes a water separation block and an elastic member connected to the water separation block. The telescopic direction of the elastic member is the same as the length direction of the water separating tube.

[0012] In some embodiments, the swelling structure includes a first water separation member, a second water separation member, and an elastic member arranged between the first water separation member and the second water separation member. The first water separation member is connected to the water separating tube, the second water separation member is connected to the flow guiding member, and the telescopic direction of the elastic member is the same as the length direction of the water separating tube; a sealing member is further provided between the first water separation member and the second water separation member to seal the gap therebetween.

[0013] In some embodiments, adjacent cooling jackets are connected by mating a butt flange and a mounting flange. The single-tube assembly and the cooling jacket are connected by mating a butt flange and a mounting flange.

[0014] Compared with the prior art, the burner provided by the embodiment of the present invention is cooled by a jacket-type cooling channel arranged around the central channel, and a swelling structure and a connecting member are arranged at a position close to the end of the cooling channel. The swelling structure can absorb the thermal expansion of the cooling jacket, solving the problem of damage caused by stress concentration due to extrusion at its end; through the constraint effect of the connecting member, the telescopic consistency of the cooling jacket can be ensured, the service life of the end cover is prolonged, and a strong guarantee is provided for the safe, stable, and long-term operation of the burner. Description of the Drawings

[0015] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The same reference numerals with alphabetical suffixes or different alphabetical suffixes may represent different instances of similar components. The drawings generally illustrate various embodiments by way of example and not limitation, and are used in conjunction with the description and the claims to explain the embodiments of the invention. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be an exhaustive or exclusive embodiment of the device or method.

[0016] Figure 1 A side cross-sectional view of the burner according to an embodiment of the present invention;

[0017] Figure 2 A side cross-sectional view of another burner according to an embodiment of the present invention;

[0018] Figure 3 A side cross-sectional view of yet another burner according to an embodiment of the present invention;

[0019] Figure 4 A side cross-sectional view of the cooling jacket of the burner according to an embodiment of the present invention;

[0020] Figure 5 A top cross-sectional view of the connecting member of the burner according to an embodiment of the present invention;

[0021] Figure 6 A schematic structural view of the swelling structure of the cooling jacket according to an embodiment of the present invention;

[0022] Figure 7 A schematic structural view of another swelling structure of the cooling jacket according to an embodiment of the present invention;

[0023] Figure 8 A schematic structural view of yet another swelling structure of the cooling jacket according to an embodiment of the present invention;

[0024] Figure 9 A top structural view of the flow guide member of the cooling jacket according to an embodiment of the present invention; wherein, Figure 9 (a) is a straight rib type flow guide member, Figure 9 (b) is an involute rib type flow guide member, Figure 9 (c) is a cylindrical turbulence type flow guide member, 9 (d) is a single spiral type flow guide member, Figure 9 (e) is a double spiral type flow guide member, Figure 9 (f) is a four spiral type flow guide member.

[0025] Reference numerals:

[0026] 10 - Cooling jacket, 101 - First cooling inlet and outlet, 102 - Second cooling inlet and outlet, 103 - First feed inlet, 104 - First material channel; 20 - Single - tube assembly, 201 - Second feed inlet, 202 - Second material channel;

[0027] 1 - Central channel; 2 - Cooling channel, 21 - First cooling channel, 22 - Second cooling channel; 3 - End cap; 4 - Swelling structure, 41 - Water separation block, 411 - First water separation part, 412 - Second water separation part, 42 - Elastic part, 43 - Sealing part; 5 - Connecting part, 51 - Connecting pipe, 511 - First connecting pipe, 512 - Second connecting pipe, 513 - Third connecting pipe, 521 - First medium channel, 522 - Second medium channel, 53 - Connecting portion; 61 - Docking flange, 62 - Mounting flange; 71 - Outer pipe; 72 - Water - separating pipe; 73 - Inner pipe; 8 - Flow - guiding part; 9 - Three - way pipe. Detailed implementation manners

[0028] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0029] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the field to which the present invention pertains. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0030] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted in the present invention.

[0031] Figures 1 to 9 It is a structural schematic diagram of the burner according to the embodiment of the present invention (the arrow direction is the flow direction of the cooling medium or the material flow direction). As Figures 1 to 9As shown in the figure, an embodiment of the present invention provides a burner, which includes at least one cooling jacket 10. The cooling jacket 10 includes a central channel 1 and a cooling channel 2 provided on the radially outer side of the central channel 1. One end of the cooling channel 2 is provided with an end cap 3 to form a closed structure. An absorbent structure 4 is provided at a position close to the end cap 3 in the cooling channel 2 to absorb the thermal expansion of the cooling jacket 10, and a connecting member 5 is also provided at a position close to the end cap 3 in the cooling channel 2.

[0032] The outer periphery (outer wall) of the cooling jacket 10 is provided with a first cooling inlet / outlet 101 and a second cooling inlet / outlet 102 that communicate with the cooling channel 2. One of them is a cooling medium inlet, and the other is a cooling medium outlet. The cooling medium inlet is provided on one side of the cooling jacket, and the cooling medium outlet is provided on the other side of the cooling jacket. The cooling medium (such as cooling water) enters the cooling channel 2 from the cooling medium inlet for cooling and then flows out from the cooling medium outlet.

[0033] The burner provided by the embodiment of the present invention is cooled by the jacket-type cooling channel 2 arranged around the central channel 1, and the absorbent structure 4 and the connecting member 5 are arranged at positions close to the end of the cooling channel 2. The absorbent structure 4 can absorb the thermal expansion of the cooling jacket 10, solving the problem of damage caused by stress concentration due to extrusion at its end; through the restraint effect of the connecting member 5, the telescopic consistency of the cooling jacket 10 can be ensured, the service life of the end cap 3 can be extended, and a strong guarantee is provided for the safe, stable and long-term operation of the burner.

[0034] In some embodiments, as Figure 2 and Figure 3 shown, the burner includes a plurality of cooling jackets 10, and the plurality of cooling jackets 10 are nested in the radial direction of the burner to form a plurality of cooling channels 2. The plurality of cooling channels 2 can be respectively filled with a cooling medium for cooling, and different cooling jackets 10 do not affect each other, that is, the plurality of cooling channels are in parallel, which can improve the cooling effect of the burner. According to the flow rate and pressure of the cooling medium, the plurality of cooling channels can also be in series, and the present invention does not specifically limit this.

[0035] Furthermore, as Figure 2 and Figure 3 shown, the lengths of the plurality of cooling jackets 10 increase sequentially from the outside to the inside in the radial direction of the burner, that is, when installing, different cooling jackets 10 are nested and installed in sequence from the top of the cooling jacket 10 from the outside to the inside, which is convenient for installation; and the cooling medium inlets and cooling medium outlets of each cooling jacket 10 are arranged staggeredly, which is convenient for the inflow and outflow of the cooling medium.

[0036] In some embodiments, at least one first feed port 103 is further provided on the outer periphery of the cooling jacket 10, and the first feed port 103 communicates with the central channel 1.

[0037] In some embodiments, the burner further includes a single-tube assembly 20, which is detachably installed in the central channel 1, or installed on the outermost side of the burner (on the outer periphery of the outermost cooling jacket 10), or installed between two adjacent cooling jackets 10. One single-tube assembly 20 can be installed in the central channel 1, or multiple single-tube assemblies 20 can be nested and installed; similarly, one single-tube assembly 20 can be installed on the outermost side of the burner, or multiple single-tube assemblies 20 can be installed; one single-tube assembly 20 can be installed between two cooling jackets 10, or multiple single-tube assemblies 20 can be installed.

[0038] As Figure 1 shown, in this embodiment, only one cooling jacket 10 is provided. The single-tube assembly 20 is installed in the central channel 1 of the cooling jacket 10. There is an annular gap between the single-tube assembly 20 and the cooling jacket 10 to form a first material channel 104 communicating with the first feed port 103. The single-tube assembly 20 includes a single-tube body. A second feed port 201 is provided at the top of the single-tube body, and a second material channel 202 is formed inside the single-tube body. One of the first material channel 104 and the second material channel 202 can be used as an oxidant channel, and the other can be used as a fuel channel. For example, the first feed port 103 is an oxidant inlet, the first material channel 104 is an oxidant channel, and oxygen or a mixture of oxygen and steam can be introduced; the second feed port 201 is a fuel inlet, the second material channel 202 is a fuel channel, and pulverized coal and a powder conveying gas can be introduced. The powder conveying gas can be carbon dioxide or nitrogen. Different materials enter the burner through the first material channel 104 and the second material channel 202 for combustion. In other embodiments, the first material channel 104 can be a fuel channel, and the second material channel 202 can be an oxidant channel. The present invention does not specifically limit this.

[0039] In some embodiments, as Figure 2 and Figure 3 shown ( Figure 2 the single-tube assembly 20 is not installed in Figure 3 and the single-tube assembly 20 is installed in the central channel 1 of the innermost cooling jacket 10 in

[0040] ), after multiple cooling jackets 10 are nested, the central channel 1 of the innermost (close to the center of the burner) cooling jacket 10 forms a material channel, and a material channel is also formed between two adjacent cooling jackets 10. Among these material channels, at least one material channel is an oxidant channel, at least one material channel is a fuel channel, and other material channels can be fuel channels, oxidant channels, or protective gas channels as needed. Here, the protective gas refers to one of nitrogen, argon, steam, and carbon dioxide gas.

[0040] When multiple cooling jackets 10 are provided and the corresponding material channels are determined, the first feed port 103 may not be provided on the outer periphery of some cooling jackets 10. For exampleFigure 2 In the arrangement in Figure 2 , the cooling jacket 10 at the center may or may not be provided with a first feed port 103. When the first feed port 103 is not provided, the material is added from the top.

[0041] In some embodiments, after multiple cooling jackets 10 are nested, the single-tube assembly 20 can also be installed between two adjacent cooling jackets 10. One or more single-tube assemblies 20 can be installed between two adjacent cooling jackets 10. When a single-tube assembly 20 is nested and installed between two cooling jackets 10, an annular gap exists between the single-tube body of the single-tube assembly 20 and each of the two cooling jackets 10. When multiple single-tube assemblies 20 are nested and installed between two cooling jackets 10, an annular gap exists between the single-tube bodies of two adjacent single-tube assemblies 20, and an annular gap exists between the single-tube body of the outermost or innermost single-tube assembly 20 and the cooling jacket 10. The above-mentioned annular gaps can all serve as material channels. When using the annular gap between the single-tube body and the cooling jacket 10 or between the single-tube bodies as a material channel, a feed port communicating with the second material channel 202 of the single-tube body can be opened on the side wall of the single-tube body. The material channel formed by the cooperation of the cooling jacket 10 and the single-tube assembly 20 has the same function as the material channel formed by the above-mentioned cooling jacket 10, and will not be elaborated here.

[0042] As Figure 2 and Figure 3 shown, the burner provided by the embodiment of the present invention can determine whether to install the single-tube assembly 20 according to needs, and determine the corresponding feed port according to actual needs. It has a reasonable structure and various combination methods, and can meet different usage requirements.

[0043] Furthermore, an ignition burner and / or a start-up burner can also be installed in the central channel 1 or in the single-tube assembly 20 for ignition and start-up.

[0044] During specific installation, between multiple cooling jackets 10, or between the cooling jacket 10 and the single-tube assembly 20, or between multiple single-tube assemblies 20, they are mutually cooperated and connected through a docking flange 61 and a mounting flange 62. That is, the cooling jacket 10 can include a docking flange 61 and a mounting flange 62 installed on the cooling jacket 10, and the single-tube assembly 20 can include a docking flange 61 and a mounting flange 62 installed on the single-tube body. They are mutually cooperated and connected through the docking flange 61 of the cooling jacket 10 or the single-tube assembly 20 and the mounting flange 62 of the single-tube assembly 20 or the cooling jacket 10. It is convenient for disassembly and assembly and has a reliable connection. As Figures 1 to 3 shown, the docking flange 61 is installed at the end of the cooling jacket 10 or the single-tube assembly 20, and the mounting flange 62 is installed on the outer periphery of the cooling jacket 10 or the single-tube assembly 20 to facilitate the installation of the burner.

[0045] In some embodiments, as Figures 1 to 5 shown, the cooling jacket 10 includes an outer tube 71, a water separation tube 72, and an inner tube 73 arranged in sequence from outside to inside. One end of the outer tube 71 and one end of the inner tube 73 are both connected to the end cap 3 to form a cooling channel. The water separation tube 72 is sleeved outside the inner tube 73 so that a first cooling channel 21 is formed between the inner tube 73 and the water separation tube 72. The outer tube 71 is sleeved outside the water separation tube 72 so that a second cooling channel 22 is formed between the water separation tube 72 and the outer tube 71. The first cooling channel 21 and the second cooling channel 22 are respectively a cooling medium inflow channel and a cooling medium outflow channel. There is a certain distance between the water separation tube 72 and the end cap 3, and one end (free end) of the water separation tube 72 is connected to the swelling structure 4. A flow guiding member 8 is arranged between the swelling structure 4 and the end cap 3. The first cooling channel 21 and the second cooling channel 22 are communicated through the flow guiding member 8.

[0046] The end cap 3 is a ring structure. The inner ring edge of the end cap 3 is hermetically connected to one end of the inner tube 73, and the outer ring edge of the end cap 3 is hermetically connected to one end of the outer tube 71 to form a closed cooling channel 2. The water separation tube 72 is located in the cooling channel 2 and divides the cooling channel 2 into a first cooling channel 21 and a second cooling channel 22. One end of the water separation tube 72 away from the end cap 3 is hermetically connected to the outer tube 71 through a water seal ring. The water seal ring is a ring structure. The inner ring edge of the water seal ring is hermetically connected to the water separation tube 72 (for example, fixed by welding), and the outer ring edge of the water seal ring is hermetically connected to the inner wall of the outer tube 71.

[0047] As Figure 4 and Figure 5 shown, the connecting member 5 is a disk structure. Three connecting tubes 51 penetrating through the upper and lower ends thereof are arranged on the disk structure to be respectively connected to the outer tube 71, the water separation tube 72, and the inner tube 73. The three connecting tubes 51 include a first connecting tube 511, a second connecting tube 512, and a third connecting tube 513 arranged in sequence from outside to inside, and are arranged in one-to-one correspondence with the outer tube 71, the water separation tube 72, and the inner tube 73. Specifically, as Figures 1 to 4As shown, the outer tube 71 includes a first outer tube section connected to the main body of the cooling jacket 10 and a second outer tube section connected to the end cap 3. The riser pipe 72 includes a first riser pipe section connected to the main body of the cooling jacket 10 and a second riser pipe section connected to the swelling structure 4. The inner tube 73 includes a first inner tube section connected to the main body of the cooling jacket 10 and a second inner tube section connected to the end cap 3. On the connector 5, the two ends of the outermost first connecting pipe 511 are respectively connected to the first outer tube section and the second outer tube section. On the connector 5, the two ends of the middle second connecting pipe 512 are respectively connected to the first riser pipe section and the second riser pipe section. One end of the second riser pipe section is connected to the second connecting pipe 512, and the other end of the second riser pipe section is connected to the swelling structure 4. On the connector 5, the two ends of the innermost third connecting pipe 513 are respectively connected to the first inner tube section and the second inner tube section. In some embodiments, the second riser pipe section may not be provided, and in this case, the second connecting pipe 512 of the connector 5 is directly connected to the swelling structure.

[0048] As Figure 5 shown, and in combination with Figure 6 , 7 and Figure 8 , a through medium channel (such as a water flow channel) is arranged between the first connecting pipe 511 and the second connecting pipe 512 of the connector 5, and between the second connecting pipe 512 and the third connecting pipe 513, so that the cooling channel is communicated with the deflector 8. The first medium channel 521 located between the first connecting pipe 511 and the second connecting pipe 512 is communicated with the second cooling channel 22, and the second medium channel 522 located between the second connecting pipe 512 and the third connecting pipe 513 is communicated with the first cooling channel 21.

[0049] In particular, between the first connecting pipe 511 and the second connecting pipe 512 of the connecting member 5, and between the second connecting pipe 512 and the third connecting pipe 513, there is a connecting portion 53 for mutual connection. The connecting portion 53 is a solid connecting portion to connect the three connecting pipes into one body. When the outer pipe 71, the riser pipe 72, and the inner pipe 73 expand, since the three connecting pipes of the connecting member 5 are connected to each other, the connecting member 5 has a restraining effect on the outer pipe 71, the riser pipe 72, and the inner pipe 73, making the expansion amounts of the outer pipe 71, the riser pipe 72, and the inner pipe 73 tend to be the same, and reducing the difference in expansion amounts among the three. Reducing the difference in expansion amounts among the three, on the one hand, can reduce the swelling amount of the swelling structure 4; on the other hand, if there is no connecting member 5, although the deformation difference between the riser pipe 72 and the other two pipes can be absorbed by the swelling structure 4, the inconsistent deformation of the outer pipe 71 and the inner pipe 73 will cause the end cover 3 to be inclined and deformed. By providing the connecting member 5, the expansion amounts of the outer pipe 71 and the inner pipe 73 can be made to tend to be the same, reducing the deformation amount of the end cover 3. In this embodiment, the medium channels are a plurality of through holes opened in the disc-shaped structure. The plurality of through holes are uniformly arranged along the circumferential direction of the disc-shaped structure, and the plurality of through holes are connected by a connecting portion; along the radial direction of the disc-shaped structure, the first through hole of the first medium channel 521 and the second through hole of the second medium channel 522 are also connected by a connecting portion. As Figure 5 shown, the first through hole and the second through hole of the second medium channel 522 can be arranged in a staggered manner and connected by a connecting portion to improve the connection strength of the connecting member 5 and ensure the restraining effect of the connecting member 5.

[0050] It should be noted that the connections between the connecting pipes 51 and the outer pipe 71, the riser pipe 72, and the inner pipe 73 are all sealed connections to prevent the leakage of the cooling medium.

[0051] As Figure 1 、 6 、7 and Figure 8 shown, the burner further includes a tee pipe 9 provided at one end of the outer pipe 71 and the inner pipe 73 away from the end cover 3 (the end opposite to the end cover 3). One end of the tee pipe 9 is respectively connected to the outer pipe 71 and the inner pipe 73, and the other end of the tee pipe 9 extends upward to be connected to the outer wall of the cooling jacket 10. Specifically, the tee pipe 9 is a ring-shaped structure. The inner ring edge of the end of the tee pipe 9 facing the outer pipe 71 and the inner pipe 73 is hermetically connected to the inner pipe 73 (for example, fixed by welding and sealing), and the outer ring edge is hermetically connected to the outer pipe 71.

[0052] As Figure 1As shown, since the outer pipe 71, the riser pipe 72, and the inner pipe 73 have different lengths, the temperatures at which the three pipe bodies operate are different, and their materials are also different. As a result, their coefficients of thermal expansion are different, and the thermal expansion lengths of the three pipe bodies are different. In addition, different pipe bodies have different thermal expansion starting points. For example, in this application, the expansion starting point of the outer pipe 71 is S1, the expansion starting point of the riser pipe 72 is S2, and the expansion starting point of the inner pipe 73 is S3. Calculations and practices have shown that the riser pipe 72 expands relatively long. To avoid exerting a squeezing effect on the end cap 3, a certain distance is provided between one end of the riser pipe 72 and the end cap 3. An expansion absorption structure 4 is provided at one end of the riser pipe 72 close to the end cap 3, and a flow guide member 8 is provided between the expansion absorption structure 4 and the end cap 3. As Figures 6 to 8 shown, the flow guide member 8 is connected to the end cap 3, which can ensure that the cooling medium flows through the flow guide channel inside the flow guide member 8 to cool the end cap 3 and ensure the safe operation of the end cap 3 in a high-temperature environment. At the same time, when the riser pipe 72 expands due to heat, the expansion absorption structure 4 can avoid the problem of hard squeezing of the end cap 3 when moving towards the end cap 3, resulting in stress concentration and damage of the end cap 3, and extend the service life of the end cap 3, providing a strong guarantee for the safe, stable, and long-term operation of the burner. As Figure 5 shown, a connecting member 5 is provided in the cooling channel 2, which can form a constraint on the outer pipe 71, the riser pipe 72, and the inner pipe 73. When the outer pipe 71, the riser pipe 72, and the inner pipe 73 expand due to heat, the elongation of the three pipes tends to be consistent, reducing the amount of inconsistent end part expansion and ensuring the stable and reliable operation of the burner. In addition, the burner structure provided by the embodiment of the present invention is simple, reasonable, and convenient to process.

[0053] In specific implementation, the first cooling inlet and outlet 101 can be arranged between the three-way pipe 9 and the water seal ring, and the second cooling inlet and outlet 102 can be arranged between the water seal ring and the mounting flange 62. The connection point between the mounting flange 62 and the outer pipe 71 is the expansion starting point S1 of the outer pipe 71.

[0054] In some embodiments, as Figure 6 and Figure 7 shown, the expansion absorption structure 4 includes a water separation block 41 and an elastic member 42 connected to the water separation block 41. The telescopic direction of the elastic member 42 is the same as the length direction of the riser pipe 72.

[0055] In some embodiments, as Figure 6 shown, the elastic member 42 is arranged between the riser pipe 72 and the water separation block 41. One end of the riser pipe 72 close to the end cap 3 is connected to one end of the water separation block 41 through the elastic member 42, and the other end of the water separation block 41 is connected to the flow guide member 8. Specifically, one end of the elastic member 42 is hermetically connected to one end of the riser pipe 72 (the end close to the end cap 3) (for example, fixed by welding and sealing), and the other end of the elastic member 42 is hermetically connected to the water separation block 41 to prevent leakage of the cooling medium.

[0056] The outer periphery of the elastic member 42 is a closed structure, which cooperates with the riser pipe 72 to form a first cooling channel 21 and a second cooling channel 22 that are separated from each other. The closed outer periphery of the elastic member 42 can prevent the cooling medium from directly flowing from one side of the elastic member 42 to the other side, ensuring that the cooling medium cools the end cover 3 through the flow guide member 8 and ensuring the safe operation of the end cover 3 in a high-temperature environment.

[0057] The telescopic direction of the elastic member 42 is the same as the length direction of the riser pipe 72. When the riser pipe 72 expands and contracts and moves relative to the end cover 3, it can drive the elastic member 42 to expand and contract. Specifically, during actual operation, due to startup, shutdown, or changes in operating conditions, when the burner is assembled at room temperature, the water separation block 41 and the elastic member 42 are in the state as shown in Figure 6 the figure, and the elastic member 42 is in a compressed state; when the burner is operating, the pipe fittings of the burner are heated and expanded. Especially when the riser pipe 72 is heated and expanded and moves towards the end cover 3, the riser pipe 72 acts on the elastic member 42, and the elastic member 42 is further compressed by the extrusion; when stopping or the operating conditions change, the riser pipe 72 contracts and moves away from the end cover 3. At this time, the pressure on the elastic member 42 decreases, and the compression amount of the elastic member 42 decreases. In this embodiment, by arranging the elastic member 42 between the riser pipe 72 and the water separation block 41, it is possible to prevent the riser pipe 72 from directly acting on the water separation block 41, driving the water separation block 41 to move and squeeze the end cover 3, resulting in stress concentration and damage to the end cover 3.

[0058] In addition, when the elastic member 42 expands and contracts with the change of operating conditions, when the riser pipe 72 contracts relatively to a certain extent, the elastic member 42 will drive the water separation block 41 to move away from the end cover 3 together with the riser pipe 72. In this embodiment, within the telescopic range of the elastic member 42, the elastic member 42 is in a compressed state, and the water separation block 41 will not move with the riser pipe 72 within the telescopic range of the elastic member 42. Therefore, it can ensure that the water separation block 41 is always in close contact with the flow guide member 8, ensure the stability of the cooling medium velocity, thereby ensuring the stability of the heat exchange effect, and will not increase the consumption of equipment operation; at the same time, it will not squeeze the end cover 3 due to the relative expansion of the riser pipe 72, and can solve the problem of stress concentration and even damage of the end cover 3 caused by thermal expansion.

[0059] When the elastic member 42 is arranged between the riser pipe 72 and the water separation block 41, the elastic member 42 is preferably an expansion joint, such as an elastic sleeve, which can prevent the cooling medium from passing through laterally while realizing expansion and contraction, that is, ensure that the cooling medium flows in or out through the first cooling channel 21, the flow guide channel of the flow guide member 8, and the second cooling channel 22.

[0060] In the embodiments of the present invention, the riser pipe 72 and the water separation block 41 are connected by the elastic member 42. The structure is reasonable and simple, and the length of the elastic member 42 can be adjusted according to the length and expansion coefficient of the riser pipe 72, etc., so as to adapt to different burners.

[0061] To ensure that the cooling medium flows through the flow guide member 8 stably, the flow guide member 8 is in close contact with the water separation block 41 and the end cover 3, and there are various connection methods between the flow guide member 8, the water separation block 41 and the end cover 3. In some embodiments, the flow guide member 8 is in contact connection with the water separation block 41, and the flow guide member 8 is in contact connection with the end cover 3, that is, the flow guide member 8 is movably connected to the water separation block 41 and the end cover 3 respectively; in other embodiments, to prevent a certain distance from being formed between the water separation block 41 and the flow guide member 8, the flow guide member 8 and the water separation block 41 can be fixedly connected. For example, the flow guide member 8 and the water separation block 41 can be welded together or integrally processed (forming an integral structure). At this time, the flow guide member 8 is arranged on the end cover 3, and the flow guide member 8 is in contact connection with the end cover 3; in still other embodiments, to prevent the flow guide member 8 from moving, the flow guide member 8 and the end cover 3 can be fixedly connected. For example, the flow guide member 8 and the end cover 3 are welded together or integrally processed. At this time, the water separation block 41 is arranged on the flow guide member 8, and the water separation block 41 is in contact connection with the flow guide member 8. That is, the flow guide member 8 is in contact connection (movable connection) with at least one of the water separation block 41 and the end cover 3. When the elastic member 42 expands and contracts, the compression amount of the elastic member changes, but the elastic member is always in a compressed state, so that the water separation block 41 and the end cover 3 are always in close contact with the flow guide member 8, ensuring the stable speed of the cooling medium, thus ensuring the stable heat exchange effect and not increasing the consumption of the equipment operation.

[0062] In other embodiments, as Figure 7 shown, the elastic member 42 is arranged between the water separation block 41 and the flow guide member 8. One end of the riser pipe 72 close to the end cover 3 is connected to one end of the water separation block 41, and the other end of the water separation block 41 is connected to the flow guide member 8 through the elastic member 42.

[0063] Specifically, one end of the riser pipe 72 close to the end cover 3 is hermetically connected to one end of the water separation block 41 (for example, hermetically fixed by welding), and the other end of the water separation block 41 is hermetically connected to the elastic member 42, that is, the riser pipe 72 is connected to the water separation block 41 and the elastic member 42 in sequence.

[0064] Furthermore, the elastic member 42 is preferably an elastic ring, such as an elastic rubber ring, which can deform when subjected to an external force and return to its original state in time after the external force acts. The elastic ring is a closed ring structure, which can prevent the cooling medium from directly flowing from one side of the elastic member 42 to the other side, ensuring that the cooling medium passes through the flow guide member 8, thereby cooling the end cover 3 and ensuring the safe operation of the end cover 3 in a high-temperature environment.

[0065] To ensure the stable flow of the cooling medium through the flow guide member 8, the flow guide member 8 is in close contact with the elastic member 42 and the end cover 3, and there can be various connection methods between the flow guide member 8, the elastic member 42, and the end cover 3. In some embodiments, the flow guide member 8 is in contact connection with the elastic member 42, and the flow guide member 8 is in contact connection with the end cover 3. At this time, the flow guide member 8 is arranged on the end cover 3, and the elastic member 42 is arranged on the flow guide member 8; in some other embodiments, the flow guide member 8 is fixedly connected with the elastic member 42, for example, by an adhesive, and the flow guide member 8 is in contact connection with the end cover 3. At this time, the flow guide member 8 is arranged on the end cover 3, and the elastic member 42 is arranged on the flow guide member 8; in still some other embodiments, the flow guide member 8 is in contact connection with the elastic member 42, and the flow guide member 8 is fixedly connected with the end cover 3, such as being welded together or integrally formed. At this time, the flow guide member 8 is arranged on the end cover 3, and the elastic member 42 is arranged on the flow guide member 8; in still some other embodiments, the flow guide member 8 is fixedly connected with the elastic member 42, for example, by an adhesive, and the flow guide member 8 is fixedly connected with the end cover 3, welded together or integrally formed. At this time, the flow guide member 8 is arranged on the end cover 3, and the elastic member 42 is arranged on the flow guide member 8. Since the elastic member 42 is preferably an elastic ring, when the elastic member 42 is fixedly connected with the flow guide member 8, it is preferably connected by an adhesive.

[0066] Furthermore, the water separation block 41 and the elastic member 42 can be fixedly connected by an adhesive or can be in contact connection (movable connection).

[0067] When the above-mentioned elastic member 42 is arranged between the water separation block 41 and the flow guide member 8, the working principle of the elastic member 42 is the same as when the elastic member 42 is arranged between the water separation pipe 72 and the water separation block 41, and will not be elaborated here.

[0068] In some embodiments, as Figure 8 shown, the imbibition structure 4 includes a first water separation member 411, a second water separation member 412, and an elastic member 42 arranged between the first water separation member 411 and the second water separation member 412. The first water separation member 411 is connected to the water separation pipe 72, the second water separation member 412 is connected to the flow guide member 8, and the telescopic direction of the elastic member 42 is the same as the length direction of the water separation pipe 72; a seal member 43 is further arranged between the first water separation member 411 and the second water separation member 412 to seal the gap therebetween.

[0069] By providing a separate first water separator 411 and a second water separator 412, the first water separator 411 and the second water separator 412 are respectively connected to the riser 72 and the flow guide member 8, and the gap between the first water separator 411 and the second water separator 412 is sealed by a seal 43, which can ensure that the cooling medium (such as water flow) passes through the flow guide member 8 to cool the end cover 3, ensuring the safe operation of the end cover 3 in a high-temperature environment; the first water separator 411 and the second water separator 412 are connected along the length direction of the riser 72 by an elastic member 42. When the riser 72 expands due to heat and drives the first water separator 411 to move towards the end cover 3, the elastic member 42 can absorb thermal expansion and contraction, playing a buffering role in the extrusion of the second water separator 412 against the end cover 3, reducing the damage problem caused by stress concentration of the end cover 3, extending the service life of the end cover 3, and the second water separator 412 is connected to the flow guide member 8, making the second water separator 412 always in close contact with the flow guide member 8, ensuring the stable flow velocity of the cooling medium inside the flow guide member, thereby ensuring the stable heat exchange effect.

[0070] Since the gap between the first water separator 411 and the second water separator 412 has been sealed by the seal 43, it is possible to prevent the cooling medium from directly flowing from one side of the elastic member 42 to the other side. Therefore, the elastic member 42 can be a closed structure or a non-closed structure, and can be a component capable of elastic expansion and contraction such as a spring or an expansion joint.

[0071] As Figure 9 shown in (a) to (f) therein, the flow guide member 8 can be one of a straight rib type flow guide member (a), an involute rib type flow guide member (b), a cylindrical turbulator type flow guide member (c), a single spiral type flow guide member (d), a double spiral type flow guide member (e), and a quadruple spiral type flow guide member (f).

[0072] It should be noted that the above-mentioned sealed connection can be directly sealed and fixed, or can be sealed and connected through an intermediate member (such as a sealing ring). For the specific connection method, the present invention is not specifically limited.

[0073] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. A burner, characterized in that, It includes at least one cooling jacket, the cooling jacket includes a central channel and a cooling channel provided on the radially outer side of the central channel, one end of the cooling channel is provided with an end cap to form a closed structure, and a swelling structure is provided at a position close to the end cap in the cooling channel to absorb the thermal expansion of the cooling jacket, and a connecting piece is also provided at a position close to the end cap in the cooling channel; The cooling jacket includes an outer tube, a water separating tube and an inner tube which are arranged in sequence from outside to inside. One end of the outer tube and one end of the inner tube are both connected to the end cap. A first cooling channel is formed between the inner tube and the water separating tube, and a second cooling channel is formed between the water separating tube and the outer tube. There is a certain distance between the water separating tube and the end cap, and one end of the water separating tube is connected to the swelling structure. A flow guiding piece is provided between the swelling structure and the end cap, and the first cooling channel and the second cooling channel are communicated through the flow guiding piece; the flow guiding piece is connected to the end cap; The connecting piece is a disc-shaped structure, and three connecting tubes penetrating through its upper and lower ends are provided on the disc-shaped structure to be respectively connected to the outer tube, the water separating tube and the inner tube; The swelling structure includes a first water separating piece, a second water separating piece and an elastic piece provided between the first water separating piece and the second water separating piece. The first water separating piece is connected to the water separating tube, the second water separating piece is connected to the flow guiding piece, and the telescopic direction of the elastic piece is the same as the length direction of the water separating tube; A sealing piece is also provided between the first water separating piece and the second water separating piece to seal the gap between the two.

2. The burner according to claim 1, characterized in that, The burner includes a plurality of cooling jackets, and the plurality of cooling jackets are nested along the radial direction of the burner to form a plurality of cooling channels.

3. The burner according to claim 1, characterized in that, One side of the cooling jacket is provided with a cooling medium inlet, and the other side is provided with a cooling medium outlet. The cooling channel is communicated with the cooling medium inlet and the cooling medium outlet; At least one feed port is also provided on the cooling jacket.

4. The burner according to claim 1, characterized in that, The burner further includes at least one single tube assembly.

5. The burner according to claim 4, characterized in that, The single tube assembly is detachably installed in the central channel, or installed on the outermost side of the burner, or installed between two adjacent cooling jackets.

6. The burner according to claim 5, characterized in that, Two adjacent cooling jackets are connected by cooperation of a butt flange and a mounting flange, and the single tube assembly and the cooling jacket are connected by cooperation of a butt flange and a mounting flange.

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