A burner and a gas preparation device

Abstract

An embodiment of the present invention provides a burner and a gas preparation device. The burner is disposed in the gas preparation device. The gas preparation device includes at least a sleeve for transporting a combustible material to be burned. The burner includes: a first chamber, sleeved on the sleeve and communicating with the sleeve for receiving and burning the combustible material to be burned to generate high-temperature flue gas. The first chamber is connected to a flue gas passage in the gas preparation device to transport the flue gas to other areas of the gas preparation device through the flue gas passage for heat exchange; a second chamber, sleeved outside the first chamber and communicating with the flue gas passage and the outside respectively for discharging the flue gas after heat exchange.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of gas preparation, and particularly to a burner and a gas preparation device. Background Art

[0002] During the gas preparation process, there are relatively high requirements for the ambient temperature. In many cases, it is necessary to ensure that the preparation process is in a high-temperature state. Moreover, during waste gas treatment, oxidation combustion treatment is mostly used to generate pollution-free substances such as carbon dioxide and water. Therefore, the setting and use of the burner are very necessary for the gas preparation device. However, the current burner structure has relatively large limitations and can only be used for the combustion of materials, and the thermal energy of the generated high-temperature flue gas has not been well utilized. In addition, the overall structure of the heater is relatively large, that is, the volume is relatively large. If the volume is blindly reduced, the heating capacity will decrease. Summary of the Invention

[0003] In order to solve the above technical problems, the embodiments of the present invention provide a burner provided in a gas preparation device. The gas preparation device includes at least a sleeve for transporting a combustible material. The burner includes:

[0004] A first chamber sleeved on the sleeve and communicating with the sleeve to receive and burn the combustible material to generate high-temperature flue gas. The first chamber is connected to a flue gas channel in the gas preparation device to transport the flue gas to other areas of the gas preparation device through the flue gas channel for heat exchange;

[0005] A second chamber sleeved outside the first chamber and communicating with the flue gas channel and the outside respectively to discharge the flue gas after heat exchange.

[0006] As an optional embodiment, the first chamber is formed by an inner tube and a middle tube sleeved with each other. The sleeve is arranged in the inner tube. There are intervals between the inner tube and the middle tube, and between the inner tube and the sleeve. A circle of through holes is provided on the inner tube. The combustible material enters the inner tube through the discharge port on the sleeve and enters the middle tube through the through holes to achieve full combustion.

[0007] As an optional embodiment, the middle tube is provided with an ignition part extending outside the burner, and the ignition part is used to introduce a fire source to burn the combustible material.

[0008] As an optional embodiment, the length of the middle tube is longer than that of the inner tube. A first annular baffle and a second annular baffle are spaced in the middle tube. The inner tube is located between the first annular baffle and the second annular baffle. The flue gas channel abuts against the first annular baffle to receive flue gas. The sleeve passes through the second annular baffle and extends into the inner tube.

[0009] As an optional embodiment, the inner diameter of the second annular baffle is at least the same as the inner diameter of the inner tube, and a portion of the middle tube extends out of the second annular baffle toward one end of the second annular baffle to form a first extension portion, and the first extension portion is connected to a third annular baffle of the sealing sleeve arranged outside the sleeve, so that an air inlet area connected to the outside and the inner tube respectively is formed between the first extension portion, the second annular baffle, and the third annular baffle, and the external airflow enters the inner tube through the air inlet area.

[0010] As an optional embodiment, a cyclone baffle surrounding the sleeve is provided on the second annular baffle located in the air inlet area, and when the external airflow enters the air inlet area, a cyclone is formed based on the cyclone baffle and then enters the first chamber.

[0011] As an optional embodiment, the inner tube is in abutment with the second annular baffle, and a fourth annular baffle is provided on the side of the inner tube facing the first annular baffle. The fourth annular baffle is sleeved on the sleeve and in abutment with the sleeve so that both ends of the inner tube are closed, and the external airflow enters the inner tube and is evenly dispersed into the middle tube through the through hole.

[0012] As an optional embodiment, the middle tube extends out of the first annular baffle toward one side of the first annular baffle to form a circle of second extension portion, and the inlet end of the smoke channel extends into the second extension portion and abuts against the second extension portion.

[0013] As an optional embodiment, an outer tube is arranged outside the middle tube, and an annular sealing plate is arranged on the end of the outer tube facing the smoke duct, and a first partition is arranged axially between the outer tube and part of the middle tube, one end of the first partition is at least flush with the end of the middle tube facing away from the smoke channel, and the other end is at most flush with the end of the middle tube facing the smoke channel, the first partition divides the annular area between the outer tube and the middle tube into a first part and a second part, a second partition corresponding to the first partition is radially arranged in the first part, the second part is connected to the outlet end of the smoke channel for conveying smoke, and the second chamber at least includes the second part.

[0014] Another embodiment of the present invention also provides a gas preparation device, including a sleeve for conveying a substance to be combusted and a burner as described in any of the above embodiments and sleeved on the sleeve.

[0015] Based on the disclosure of the above embodiments, the beneficial effects of the embodiments of the present invention include that the overall structure of the heater is simple and compact, supporting the use in small gas preparation devices. By setting the heater in a form with two independent chambers, the heater can simultaneously have the functions of combustion and flue gas discharge, and the combustion of the object to be burned, the output and recovery of flue gas can all be carried out independently without interference with each other. In addition, the two chambers are respectively connected to both ends of the flue gas passage, and the flue gas passage can cover other areas of the gas preparation device. Therefore, when high-temperature flue gas is generated in the first chamber, the high-temperature flue gas can transfer heat energy to other areas of the gas preparation device through the flue gas passage, and then be transported out from the second chamber of the burner through the flue gas passage. In this way, not only can the transfer of heat energy be realized, avoiding the waste of heat energy, but also space can be saved, and the volume of the heater and the gas preparation device can be reduced.

[0016] Other features and advantages of the present invention will be described in the following specification, and part of them will be obvious from the specification or understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained through the structures specifically pointed out in the written specification, claims, and drawings.

[0017] The technical solutions of the present invention will be further described in detail below through the drawings and embodiments. Description of the Drawings

[0018] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0019] Figure 1 It is a schematic structural diagram of the burner in the embodiment of the present invention.

[0020] Figure 2 It is a partial structural diagram of the burner in the embodiment of the present invention.

[0021] Figure 3 It is a partial structural diagram of the burner in the embodiment of the present invention.

[0022] Figure 4 It is a partial structural diagram of the burner in the embodiment of the present invention.

[0023] Figure 5 It is a partial structural diagram of the burner in the embodiment of the present invention.

[0024] Figure 6 It is a diagram showing the flow directions of fuel, the object to be burned, and flue gas during the actual application of the burner in the embodiment of the present invention.

[0025] Reference Signs:

[0026] 1 - Sleeve; 2 - First chamber; 3 - Second chamber; 4 - Inner tube; 5 - Middle tube; 6 - Through hole; 7 - Ignition part; 8 - Fuel pipeline; 9 - First annular baffle; 10 - Second annular baffle; 11 - Third annular baffle; 12 - Cyclone baffle; 13 - Air inlet area; 14 - Fourth annular baffle; 15 - Second extension; 16 - Compression ring; 17 - First partition; 18 - Second partition; 19 - First area; 20 - Second area; 21 - Outer tube Detailed implementation manners

[0027] Next, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings, but it is not a limitation of the present invention.

[0028] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the following description should not be regarded as limiting, but only as an example of the embodiments. Those skilled in the art will think of other modifications within the scope and spirit of the present disclosure.

[0029] The accompanying drawings included in the specification and constituting a part of the specification illustrate embodiments of the present disclosure, and together with the general description of the present disclosure given above and the detailed description of the embodiments given below are used to explain the principles of the present disclosure.

[0030] These and other features of the present invention will become apparent from the following description of the preferred forms of the embodiments given by way of non - limiting examples with reference to the accompanying drawings.

[0031] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art can surely implement many other equivalent forms of the present invention, which have the features as described in the claims and thus are all within the protection scope defined thereby.

[0032] When combined with the accompanying drawings, the above - mentioned and other aspects, features, and advantages of the present disclosure will become more apparent in view of the following detailed description.

[0033] Hereinafter, specific embodiments of the present disclosure will be described with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are only examples of the present disclosure, and it can be implemented in various ways. Well - known and / or repetitive functions and structures are not described in detail to avoid unnecessary or redundant details from obscuring the present disclosure. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but only as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in substantially any suitable detailed structure in a variety of ways.

[0034] This specification may use phrases such as "in one embodiment", "in another embodiment", "in yet another embodiment", or "in other embodiments", all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0035] Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0036] As Figure 1 and Figure 2 shown, an embodiment of the present invention provides a burner disposed in a gas preparation device. The gas preparation device includes at least a sleeve 1 for transporting the material to be burned. The burner includes:

[0037] A first chamber 2, sleeved on the sleeve 1 and communicating with the sleeve 1 for receiving and burning the material to be burned to generate high-temperature flue gas. The first chamber 2 is connected to a flue gas passage in the gas preparation device to transport the flue gas to other areas of the gas preparation device through the flue gas passage for heat exchange;

[0038] A second chamber 3, sleeved outside the first chamber 2 and communicating with the flue gas passage and the outside respectively for discharging the flue gas after heat exchange.

[0039] For example, the gas preparation device in this embodiment may be used to prepare gases such as hydrogen, and is not specifically limited. The gas preparation device includes one or more of, but is not limited to, a catalytic converter, a purifier, and a heat exchanger. The device also includes at least a sleeve 1 (shown as a dotted line in the figure) for transporting the material to be burned. The sleeve 1 may include multiple pipe bodies or only one pipe body, which is not specifically determined. When including multiple pipe bodies, the outermost pipe body is used to transport the material to be burned, and the other inner pipe bodies may be used to transport other substances, such as transporting hydrogen, waste gas, etc. In addition, the gas preparation device in this embodiment also includes a flue gas passage (not shown in the figure). The passage inlet and the passage outlet are respectively connected to different areas of the burner, and the passage itself can penetrate multiple devices in the device and extend to multiple areas to provide heat energy for the device, that is, the heat energy of the high-temperature flue gas in the pipeline is dissipated and absorbed by other devices in the device, and then discharged to improve the heat energy utilization rate and avoid wasting heat energy. Further, in combination with Figure 6As shown in the figure, the burner in this embodiment includes an independent first chamber 2 and a second chamber 3, and the first chamber 2 and the second chamber 3 are not connected to each other. The first chamber 2 is sleeved on the sleeve 1 and is communicated with the sleeve 1 to receive the material to be burned and burn the material to be burned to generate high-temperature flue gas. The material to be burned in this embodiment can be fuel, such as gaseous or liquid fuel, transported from the outside to the first chamber 2 through the sleeve 1, or the material to be burned can also be waste gas obtained by the sleeve 1 from other components in the gas preparation device, etc., which is not specified specifically. The first chamber 2 is connected to the channel inlet end of the flue gas channel to transport the high-temperature flue gas generated by combustion to other areas of the device through the flue gas channel for heat exchange, raise the temperature of the whole device, and at the same time reduce the temperature of the flue gas so that it can be safely discharged. At the same time, since the first chamber 2 is annular and surrounds the sleeve 1, the first chamber 2 can also heat the sleeve 1 to vaporize the liquid in other tubes inside the sleeve 1, or heat the material in the tube, etc., which can be determined according to the actual situation. The second chamber 3 is sleeved outside the first chamber 2 and is respectively communicated with the outside, that is, the outside of the device and the outlet end of the flue gas channel, to discharge the flue gas that has completed heat exchange.

[0040] Based on the disclosure of the above embodiment, it can be known that the beneficial effects of this embodiment include that the overall structure of the heater is simple and compact, which supports the use of small gas preparation devices. By setting the heater in the form of having two independent chambers, the heater can simultaneously have the functions of combustion and flue gas discharge, and the combustion of the material to be burned, the output and recovery of the flue gas can all be carried out independently without interference with each other. In addition, the two chambers are respectively connected to both ends of the flue gas channel, and at the same time the flue gas channel can cover other areas of the gas preparation device. Therefore, when the first chamber 2 generates high-temperature flue gas, the high-temperature flue gas can transfer heat energy to other areas of the gas preparation device through the flue gas channel, and then be transported out from the second chamber 3 of the burner through the flue gas channel. In this way, not only can the transfer of heat energy be realized, the waste of heat energy be avoided, but also the space can be saved and the volume of the heater and the gas preparation device can be reduced.

[0041] Furthermore, in combination with Figure 3 and Figure 4As shown, the first chamber 2 in this embodiment is formed by an inner tube 4 and a middle tube 5 sleeved with each other, and the sleeve 1 is inserted through the inner tube 4. There are intervals between the inner tube 4 and the middle tube 5, and between the inner tube 4 and the sleeve 1, that is, there are annular inner cavities, and all these annular inner cavities form the first chamber 2. A circle of through holes 6 is provided on the inner tube 4. The shape of the through hole 6 is not unique. It can be a round hole, a strip hole, or an oblong hole, etc. The material to be burned enters the inner tube 4 through the discharge port on the sleeve 1 and enters the middle tube 5 through a circle of through holes 6 on the inner tube 4, so that the material to be burned can cover the periphery of the middle tube 5, thereby achieving full combustion. Especially when the material to be burned is a gas, the gas can be scattered from the through hole 6 into the middle tube 5. If necessary, the aperture of the through hole 6 can also be reduced so that the gas is in a jet shape. The specific setting method is not fixed and needs to be determined according to the actual combustion requirements.

[0042] Continuing to combine Figure 3 and Figure 4 As shown, the middle tube 5 in this embodiment is provided with an ignition part 7 extending outside the burner. The ignition part 7 is used to introduce a fire source to burn the material to be burned. For example, the ignition part 7 can be a pipe extending to the outside. An ignition core is arranged inside the pipe. Users can introduce a fire source into the middle tube 5 through the ignition core to achieve combustion. In addition, not only can the sleeve 1 transport fuel into the middle tube 5, but also a fuel pipe 8 for transporting fuel into the middle tube 5 can be inserted through the ignition part 7. For example, liquid fuel such as pure methanol can be transported through the fuel pipe 8, or gas fuel can be transported, and the specific type is not limited. For example, the sleeve 1 is used to transport the waste gas generated in the device into the first chamber 2 for combustion. However, when the device is not started and preheating is required, the fuel pipe 8 can be used to transport fuel into the first chamber 2 to make it burn to generate high-temperature flue gas, and the device can be preheated through the transportation of the flue gas channel.

[0043] Furthermore, the length of the middle tube 5 in this embodiment is longer than that of the inner tube 4. A first annular baffle 9 and a second annular baffle 10 are arranged at intervals in the middle tube 5. The two annular baffles are also sleeved on the sleeve 1. The inner tube 4 is located between the first annular baffle 9 and the second annular baffle 10. The flue gas channel abuts against the first annular baffle 9 to receive flue gas. The sleeve 1 passes through the second annular baffle 10 and extends into the inner tube 4.

[0044] Continuing to combine Figure 2 、 Figure 3 and Figure 4 As shown, the inner diameter of the second annular baffle 10 in this embodiment is at least the same as that of the inner tube 4, and it can also be larger than the inner diameter of the inner tube 4, but it cannot be too large to avoid leakage of the material to be burned, fuel, etc. One end of a part of the middle tube 5 facing the second annular baffle 10 extends out of the second annular baffle 10 to form a first extension part, as Figure 4As shown in the figure, the first extension part may be formed by 1 / 2 edge of the middle tube 5 extending axially from the second annular baffle 10, or of course, the edge of 2 / 3, etc., without limitation. The first extension part is connected to the third annular baffle 11 which is sealed and sleeved outside the casing 1, that is, the third annular baffle 11 is sleeved on the casing 1 outside the first extension part, and is tightly attached to the casing 1, so that an air inlet area 13 which is connected to the outside and the inner tube 4 is formed between the first extension part, the second annular baffle 10, and the third annular baffle 11, respectively, and is in a circular shape, half of which is closed and the other half is open, and the external airflow enters the inner tube 4 from the gap between the casing 1 and the inner tube 4 through the open part of the air inlet area 13. The external airflow can be formed by arranging a blower outside the device, and the airflow is blown to the air inlet area 13 by the operation of the blower.

[0045] Preferably, combined Figure 5 As shown, in order to allow the airflow to enter the first chamber 2 in larger quantity and faster, and fill the first chamber 2, so that the objects to be burned, fuel, etc. are fully burned, a cyclone baffle 12 surrounding the sleeve 1 is provided on the second annular baffle 10 located in the air inlet area 13 in this embodiment. For example, a cyclone baffle 12 in a cyclone shape is provided around the central hole of the second annular sleeve 1. As shown in the figure, when the external airflow enters the air inlet area 13, the airflow can be formed into a rotating airflow based on the guiding effect of the cyclone baffle 12 and then enter the first chamber 2 to achieve sufficient combustion assistance.

[0046] Optionally, the arrangement of the circle of cyclone baffles 12 is not unique, and is preferably arranged at the outer edge of the central hole of the second annular baffle 10, or may be arranged at a position with a certain distance from the central hole. In addition, in order to facilitate the airflow to enter the air inlet area 13, in this embodiment, the portion of the third annular baffle 11 corresponding to the air inlet area 13 may be reduced, and the portion of the third annular baffle 11 only covers the cyclone baffle 12.

[0047] Continue to combine Figure 3 and Figure 4 As shown, the inner tube 4 in this embodiment is in contact with the second annular baffle 10, and can also be directly fixed on the second annular baffle 10. A third annular baffle 11 is provided on the side of the inner tube 4 facing the first annular baffle 9, and a fourth annular baffle 14 is sleeved on the sleeve 1 and in contact with the sleeve 1, so that both ends of the inner tube 4 are closed, that is, the two ends of the inner tube 4 are respectively sealed by the second annular baffle 10 and the fourth annular baffle 14, or are approximately sealed, so that after the external airflow enters the inner tube 4, it can only be evenly dispersed into the middle tube 5 through the through hole 6 for combustion, so that oxygen and fuel are fully mixed to ensure the combustion effect.

[0048] Further, one side of the middle tube 5 in this embodiment extends out of the first annular baffle 9 towards the first annular baffle 9 to form a circle of second extension parts 15. The inlet end of the flue gas passage extends into the second extension parts 15 and is in corresponding abutment with the second extension parts 15. That is to say, it is equivalent to that the inlet end of the flue gas passage is inserted and matched with the second extension parts 15. In application, in order to ensure the sealing effect, a compression ring 16 can also be provided between the second extension parts 15 and the flue gas passage. As Figure 6 shown, when the external air flow enters the inner tube 4 in a cyclone shape, it rotates and shoots out through a circle of through holes 6 on the inner tube 4 to form a rotating air flow, and fully burns with the combustibles or fuels located in the middle tube 5 to form high-temperature flue gas wrapped with heat. The high-temperature flue gas enters the flue gas passage from the first annular plate.

[0049] Optionally, in actual application, the flue gas passage can also be directly connected to other devices for gas preparation, such as connected to a catalytic converter, or connected to other reaction pools, etc., which is not specified specifically.

[0050] Continuing to combine Figure 3 and Figure 4 shown, an outer tube is sleeved outside the middle tube 5 in this embodiment. The axial dimension of the outer tube is not less than that of the middle tube 5. And one end of the outer tube facing the flue gas pipe is provided with an annular sealing plate sleeved on the flue gas pipe for sealing the annular area between the outer tube and the middle tube 5. Further, as Figure 3As shown, in this embodiment, a first partition 17 is axially arranged between the outer tube and part of the middle tube 5, one end of the first partition 17 is at least flush with the end of the middle tube 5 away from the smoke channel, and the other end is at most flush with the end of the middle tube 5 facing the smoke channel. For example, the other end of the first partition 17 in this embodiment is located in the middle of the terminal, which is not specified. The first partition 17 divides the annular area between the outer tube and the middle tube 5 into a first part 19 and a second part 20 that are not connected to each other. A second partition 18 corresponding to the first partition 17 is radially arranged in the first part 19. The second part 20 is connected to the outlet end of the smoke channel for conveying smoke, and the second chamber 3 includes at least the second part 20. That is, as shown in the figure, the second partition 18 in this embodiment is arranged in the middle section of the annular area surrounded by the middle tube 5 and the outer tube. The plane where the second partition 18 is located is coplanar with the plane where the first partition 17 is located at one end of the flue gas channel. After the first partition 17 and the second partition 18 are arranged, the first part 19 can be further divided into two areas. One area is connected to the second part 20. This area and the second part 20 together constitute the second chamber 3. The outlet end of the flue gas channel is connected to this area or the second part 20 so that the flue gas after heat exchange can be successfully exported from the gas preparation device. The other area of ​​the first part 19 is connected to the outside and the air inlet area 13, which is used to introduce external airflow. Through the arrangement of the above two partitions, the external airflow and the flue gas can be isolated and do not interfere with each other. The flue gas will not be sucked into the burner for the second time to interfere with the combustion, so the combustion effect of the burner is significantly improved.

[0051] Furthermore, another embodiment of the present invention also provides a gas preparation device, including a sleeve for conveying a material to be combusted and a burner as described in any of the embodiments above and sleeved on the sleeve.

[0052] In actual application, the gas preparation device may be provided with an outer shell, the burner may be fixed in the outer shell, and connected with other devices in the device by arranging flanges at both ends.

[0053] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A burner is provided in a gas preparation device. The gas preparation device includes at least a sleeve for transporting the material to be burned. It is characterized in that, The burner includes: A first chamber, sleeved on the sleeve and communicating with the sleeve for receiving and burning the material to be burned to generate high-temperature flue gas. The first chamber is connected to the flue gas passage in the gas preparation device to transport the flue gas to other areas of the gas preparation device through the flue gas passage for heat exchange; A second chamber, sleeved outside the first chamber and communicating with the flue gas passage and the outside respectively for discharging the flue gas after heat exchange; The first chamber is formed by an inner pipe and a middle pipe sleeved with each other. The sleeve is arranged in the inner pipe. There are intervals between the inner pipe and the middle pipe, and between the inner pipe and the sleeve. A circle of through holes is provided on the inner pipe. The material to be burned enters the inner pipe through the discharge port on the sleeve and enters the middle pipe through the through holes to achieve full combustion; The length of the middle pipe is longer than that of the inner pipe. A first annular baffle and a second annular baffle are arranged at intervals in the middle pipe. The inner pipe is located between the first annular baffle and the second annular baffle. The flue gas passage abuts against the first annular baffle for receiving flue gas. The sleeve passes through the second annular baffle and extends into the inner pipe; 2. The burner according to claim 1, characterized in that, The middle pipe is provided with an ignition part extending outside the burner. The ignition part is used for introducing a fire source to burn the material to be burned. The fuel pipe for transporting fuel into the middle pipe is also arranged in the ignition part; 3. The burner according to claim 1, characterized in that, The inner diameter of the second annular baffle is at least the same as that of the inner pipe. One end of the middle pipe facing the second annular baffle extends out of the second annular baffle to form a first extension part. The first extension part is connected to a third annular baffle sleeved outside the sleeve in a sealed manner, so that an air inlet area communicating with the outside and the inner pipe is formed between the first extension part, the second annular baffle and the third annular baffle. External air flow enters the inner pipe through the air inlet area; 4. The burner according to claim 3, characterized in that, A circle of cyclone baffles surrounding the sleeve is arranged on the second annular baffle in the air inlet area. When the external air flow enters the air inlet area, it forms a cyclone based on the cyclone baffles and then enters the first chamber; 5. The burner according to claim 1, characterized in that, The inner pipe abuts against the second annular baffle. A fourth annular baffle is arranged on one side of the inner pipe facing the first annular baffle. The fourth annular baffle is sleeved on the sleeve and abuts against the sleeve correspondingly, so that both ends of the inner pipe are in a closed state. The external air flow enters the inner pipe and is evenly dispersed into the middle pipe through the through holes; 6. The burner according to claim 1, characterized in that, One side of the middle pipe facing the first annular baffle extends out of the first annular baffle to form a circle of second extension parts. The inlet end of the flue gas passage extends into the second extension parts and abuts against the second extension parts correspondingly; 7. The burner according to claim 1, characterized in that, An outer tube is arranged outside the middle tube, and an annular sealing plate is arranged on one end of the outer tube facing the smoke channel, and a first partition is arranged axially between the outer tube and part of the middle tube, and one end of the first partition is at least flush with one end of the middle tube away from the smoke channel, and the other end is at most flush with one end of the middle tube facing the smoke channel, and the first partition divides the annular area between the outer tube and the middle tube into a first part and a second part, and a second partition corresponding to the first partition is radially arranged in the first part, and the second part is connected to the outlet end of the smoke channel for conveying smoke, and the second chamber at least includes the second part.

8. A gas preparation device, characterized in that, The invention comprises a sleeve for conveying materials to be combusted and a burner as claimed in any one of claims 1 to 7 which is sleeved on the sleeve.

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