Gas phase distribution device and catalytic reaction equipment

Abstract

The embodiment of the present application provides a gas phase distribution device and a catalytic reaction device, wherein the gas phase distribution device includes a main pipeline, and the main pipeline includes: a partition plate, which is arranged in the inner cavity of the main pipeline to divide the inner cavity of the main pipeline into a first cavity and a second cavity, and the main pipeline is provided with a feed port connected to the first cavity and a discharge port connected to the second cavity; a retarder, which is located in the second cavity, and the partition plate is provided with a first opening corresponding to the retarder, and the inner cavity of the retarder is connected to the first cavity through the first opening, and the cavity wall of the retarder is provided with at least two second openings, and the inner cavity of the retarder is connected to the second cavity through at least two second openings. The gas phase distribution device of the present application can fully divert and buffer the vaporized material, so that the vaporized material sprayed from the gas phase distribution device is uniform and pressure-balanced, and the vaporized material is prevented from forming a biased flow, so that the vaporized material is fully in contact with the catalyst, and the catalytic reaction conversion rate is improved.

Description

Technical Field

[0001] The present application relates to the field of chemical technology, and in particular to a gas phase distribution device and a catalytic reaction equipment. Background Art

[0002] During the catalytic reaction process of chemical production, after the heated and vaporized material enters the converter head, the vaporized material penetrates into the catalyst in the tube array. Under the action of heat and power, the material and catalyst are in close contact to complete the catalytic reaction.

[0003] However, in actual production, the vaporized material cannot fully contact the catalyst on the surface of the tubes. The material is in close contact with the catalyst facing the tubes, while the catalyst in the surrounding tubes has less contact with the material. The material forms a bias flow in the tubes, causing the middle catalyst to quickly pulverize and deactivate, making it more difficult to replace the catalyst. Summary of the invention

[0004] The embodiments of the present application provide a gas phase distribution device and a catalytic reaction device to solve or alleviate one or more technical problems in the prior art.

[0005] As one aspect of an embodiment of the present application, an embodiment of the present application provides a gas phase distribution device, including a main pipeline, the main pipeline including:

[0006] A partition plate is arranged in the inner cavity of the main pipeline to divide the inner cavity of the main pipeline into a first cavity and a second cavity. A feed inlet and a discharge inlet are provided on the wall of the main pipeline. The feed inlet is connected to the first cavity, and the discharge inlet is connected to the second cavity.

[0007] The flow damper is located in the second cavity, the partition plate is provided with a first opening corresponding to the flow damper, the inner cavity of the flow damper is connected with the first cavity through the first opening, the cavity wall of the flow damper is provided with at least two second openings, and the inner cavity of the flow damper is connected with the second cavity through at least two second openings.

[0008] In some possible implementations, the flow regulator includes a first branch pipe and a second branch pipe connected to each other, wherein the first branch pipe and the second branch pipe are connected to the first cavity through a first opening at the connection between the first branch pipe and the second branch pipe, and the second opening is opened on the pipe wall of the first branch pipe and the pipe wall of the second branch pipe.

[0009] In some possible implementations, the first branch pipe and the second branch pipe are both curved, the first branch pipe and the second branch pipe are smoothly connected, and the first branch pipe and the second branch pipe are symmetrically arranged.

[0010] In some possible implementations, the number of the discharge ports is equal to the number of the flow dampers, and each discharge port is arranged opposite to the first opening corresponding to each flow damper.

[0011] In some possible implementations, the gas phase distribution device also includes multiple branch pipes, each branch pipe is connected to each discharge port one by one, and the wall of the branch pipe is provided with multiple distribution holes arranged along the extension direction of the branch pipe, and the extension direction of the branch pipe is perpendicular to the extension direction of the main pipe.

[0012] In some possible implementations, the feed inlet is located in the middle of the main pipeline, and the lengths of the plurality of branch pipelines gradually decrease along the direction from the feed inlet toward the end of the main pipeline.

[0013] In some possible implementations, the gas phase distribution device further includes a nozzle disposed on the material distribution hole to spray out the vaporized material.

[0014] In some possible implementations, the nozzle is in the shape of an open spherical crown.

[0015] As another aspect of the embodiment of the present application, the embodiment of the present application also provides a catalytic reaction device, including a converter head and the gas phase distribution device described above, the feed port is connected to the inlet of the converter head, the catalytic reaction device also includes a catalyst pipe for holding the catalyst, and the discharge port faces the catalyst pipe.

[0016] In some possible implementations, the multiple catalyst pipes are arranged in parallel and at intervals, the extension direction of the main pipe is the same as the arrangement direction of the multiple catalyst pipes, and the main pipe spans across the catalyst pipes.

[0017] The gas phase distribution device of the embodiment of the present application is used in a catalytic reaction device, and can fully divert and buffer the incoming vaporized material, so that the vaporized material sprayed out from the gas phase distribution device is uniform and the pressure is balanced, avoiding the formation of bias flow of the vaporized material on the surface of the catalyst pipeline, so that the vaporized material can fully contact the catalyst in the catalyst pipeline, thereby improving the conversion rate of the catalytic reaction, avoiding the rapid pulverization and deactivation of the intermediate catalyst, and reducing the difficulty of catalyst replacement.

[0018] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0020] Figure 1 This is a schematic diagram of the structure of a gas phase distribution device in one embodiment of the present application;

[0021] Figure 2 is a top perspective schematic diagram of a gas phase distribution device in one embodiment;

[0022] Figure 3 This is a schematic diagram of a catalytic reaction device in one embodiment of the present application.

[0023] Description of reference numerals:

[0024] 10. Main pipeline; 11. Partition plate; 111. First cavity; 112. Second cavity; 12. Flow retarder; 121. First branch pipe; 122. Second branch pipe; 13. Feed inlet; 14. Discharge outlet; 15. First opening; 16. Second opening; 20. Branch pipeline; 21. Distribution hole; 100. Gas phase distribution device; 200. Converter head; 300. Catalyst pipeline. DETAILED DESCRIPTION

[0025] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0026] Figure 1 Schematic diagram of the structure of the gas phase distribution device in one embodiment of the present application. Figure 1 As shown, the gas phase distribution device of the embodiment of the present application includes a main pipeline 10, and the main pipeline 10 includes a partition plate 11 and a flow retarder 12. The partition plate 11 is arranged in the inner cavity of the main pipeline 10, and the partition plate 11 divides the inner cavity of the main pipeline 10 into a first cavity 111 and a second cavity 112. The wall of the main pipeline 10 is provided with a feed port 13 and a discharge port 14, the feed port 13 is connected to the first cavity 111, and the discharge port 14 is connected to the second cavity 112.

[0027] The flow retarder 12 is located in the second cavity 112. Figure 1 As shown, the partition plate 11 is provided with a first opening 15, and the first opening 15 corresponds to the damper 12. The inner cavity of the damper 12 is connected to the first cavity 111 through the first opening 15. The cavity wall of the damper 12 is provided with at least two second openings 16, and the inner cavity of the damper 12 is connected to the second cavity 112 through the at least two second openings 16.

[0028] The gas phase distribution device of the embodiment of the present application can be applied to catalytic reaction equipment. The gas phase distribution device is usually arranged in the converter head, and the converter head can define the catalytic reaction area. The feed port is connected to the inlet of the converter head. The vaporized material entering the gas phase distribution device from the inlet passes through the gas phase distribution device, is sprayed on the catalyst pipeline in the catalytic reaction area, and contacts with the catalyst in the catalyst pipeline to complete the catalytic effect. During operation, after the vaporized material enters the main pipeline from the feed port 13, it is dispersed and buffered in the first cavity 111, enters the retarder 12 through the first port 15, and then enters the second cavity 112 through at least two second ports 16. The cavity wall of the retarder 12 is provided with at least two second openings 16, and the retarder 12 can further divert and buffer the vaporized material, so that the vaporized material entering the second cavity 112 from the inner cavity of the retarder 12 is more uniform and the pressure is more balanced. Therefore, the vaporized material discharged from the discharge port 14 from the second cavity 112 is more uniform and the pressure is more balanced, thereby avoiding the formation of biased flow of the vaporized material in the catalytic reaction area, allowing the vaporized material to fully contact the catalyst in the catalyst pipeline, thereby improving the catalytic reaction conversion rate, avoiding the rapid pulverization and deactivation of the intermediate catalyst, and reducing the difficulty of catalyst replacement.

[0029] In one embodiment, the cross-section of the main pipe 10 can be in a circular, square or other shape. The cross-section shape of the main pipe 10 can be determined according to actual needs.

[0030] In one embodiment, the partition plate 11 divides the inner cavity of the main pipe 10 into a first cavity 111 and a second cavity 112, and the height ratio of the first cavity 111 to the second cavity 112 can be 1 / 2 to 1 / 4 (including the endpoint values), that is, the height ratio of the first cavity 111 to the second cavity 112 can be any value between 1 / 2 and 1 / 4. Exemplarily, the height ratio of the first cavity 111 to the second cavity 112 can be any value among 1 / 2, 1 / 3, and 1 / 4.

[0031] In one embodiment, in order to make the vaporized material disperse more fully, the number of the first openings 15 and the flow retarder 12 can be multiple, and each first opening 15 corresponds to each flow retarder 12. Thus, the vaporized material can be dispersed in the first cavity 111 and enter the corresponding flow retarder 12 through different first openings 15.

[0032] The vaporized material enters the inner cavity of the main pipeline from the feed port of the main pipeline, and is then discharged through the discharge port. In order to further improve the flow performance of the vaporized material in the main pipeline, in one embodiment, the position of the partition plate is reasonably set so that the first cavity 111 and the second cavity 112 are arranged in sequence along the direction from the feed port to the discharge port, and the second cavity 112 is located downstream of the first cavity 111, thereby increasing the flow velocity of the vaporized material in the inner cavity of the main pipeline and improving the catalytic reaction efficiency.

[0033] The inner cavity of the flow retarder 12 is connected to the first cavity 111 through the first opening 15, and the cavity wall of the flow retarder 12 is provided with at least two second openings 16. For example, the flow retarder 12 can be a tubular container, and the second openings start on the wall of the tubular container. The flow retarder 12 can be a straight tube or a curved tube. In other embodiments, the flow retarder can also be a container of a spherical, elliptical, or other realizable shapes.

[0034] In one embodiment, Figure 1 As shown, the flow retarder 12 includes a first branch pipe 121 and a second branch pipe 122, and the first branch pipe 121 and the second branch pipe 122 are connected. The first branch pipe 121 and the second branch pipe 122 are both connected to the first cavity 111 through the first port 15 at the connection between the first branch pipe 121 and the second branch pipe 122. The second port 16 is provided on the tube wall of the first branch pipe 121 and the tube wall of the second branch pipe 122. In the flow retarder of this structure, the vaporized material is divided into two after entering the flow retarder through the first port 15, and enters the first branch pipe 121 and the second branch pipe 122 respectively, so that the vaporized material is further diverted. The vaporized material in the first branch pipe 121 and the second branch pipe 122 enters the second cavity through the second port, so that the vaporized material is diverted again, so that the vaporized material entering the second cavity through the flow retarder is more uniform and the pressure is more balanced.

[0035] In one embodiment, the tube wall of the first branch pipe 121 may be provided with at least two second openings 16, and the tube wall of the second branch pipe 122 may be provided with at least two second openings 16. Exemplarily, the second openings on the first branch pipe 121 may be arranged along the extension direction of the first branch pipe, and the second openings on the second branch pipe 122 may be arranged along the extension direction of the second branch pipe.

[0036] In one embodiment, the first branch pipe 121 may be in a straight tube shape, extending from the first opening 15 in a direction away from the partition plate 11 . The second branch pipe 122 may be in a straight tube shape, extending from the first opening 15 in a direction away from the partition plate 11 .

[0037] In one embodiment, the first branch pipe 121 and the second branch pipe 122 can be symmetrically arranged relative to the axis of the first port 15, so that the vaporized materials discharged from the first branch pipe and the second branch pipe are more balanced, which is conducive to further uniform mixing of the vaporized materials in the second cavity. For example, from the first port toward the direction away from the first port, the distance between the first branch pipe and the second branch pipe gradually increases, so that the vaporized materials can be dispersed over a larger range after passing through the first branch pipe and the second branch pipe, avoiding the accumulation of the vaporized materials discharged through the second port.

[0038] In one embodiment, Figure 1 As shown, the first branch pipe 121 is curved, the second branch pipe 122 is curved, and the first branch pipe 121 and the second branch pipe 122 are smoothly connected. The first branch pipe 121 and the second branch pipe 122 are symmetrically arranged. Exemplarily, the first branch pipe 121 and the second branch pipe 122 can form a parabolic shape with the opening facing away from the first through port 15 (that is, toward the discharge port 14). With such a flow retarder, the vaporized material entering the branch pipe can be dispersed by multiple collisions after encountering the curved pipe wall, so that the vaporized material is more uniform.

[0039] In one embodiment, the number of discharge ports 14 is equal to the number of flow dampers 12, and each discharge port 14 is arranged one by one relative to the first opening 15 corresponding to each flow damper 12. The size of the discharge port can be set according to actual needs. Providing multiple discharge ports 14 can increase the discharge speed of the vaporized material and improve production efficiency. Those skilled in the art understand that the vaporized material discharged from the discharge port 14 will enter multiple catalyst pipes. Providing multiple discharge ports is conducive to the vaporized material being ejected through the corresponding discharge port into the corresponding catalyst pipe, reducing the flow path of the vaporized material between the discharge port and the catalyst pipe, and avoiding bias flow.

[0040] Figure 2 FIG. 1 is a schematic top perspective view of a gas phase distribution device in one embodiment. Figure 1 and Figure 2 As shown, the gas phase distribution device may further include a branch pipe 20, and the number of the branch pipes 20 may be multiple, and each branch pipe 20 is connected to each outlet 14 in a one-to-one correspondence. The wall of the branch pipe 20 is provided with multiple distribution holes 21, and the multiple distribution holes 21 are arranged along the extension direction of the branch pipe.

[0041] Illustratively, in a catalytic reaction device, the catalyst pipeline can be arranged parallel to the branch pipeline 20. Therefore, by setting the branch pipeline 20, the vaporized material discharged from the discharge port 14 can be further dispersed, and a plurality of distribution holes 21 are arranged along the extension direction of the branch pipeline, which is beneficial for the vaporized material discharged from each distribution hole 21 to contact with the corresponding part of the catalyst pipeline, thereby improving the catalytic reaction efficiency and material utilization.

[0042] In one embodiment, if Figure 2 As shown, the dividing holes on the branch pipe 20 are located on both sides of the main pipe 10, so that no dividing holes are set at the position opposite to the discharge port 14, so as to avoid the vaporized material discharged from the discharge port from being directly sprayed out through the relative dividing holes, which is beneficial to further homogenization of the vaporized material in the inner cavity of the branch pipe 20.

[0043] For example, the distance between two adjacent material distribution holes 21 on the branch pipe 20 (the center distance between two adjacent material distribution holes) is 2 cm to 4 cm. For example, the distance between two adjacent material distribution holes 21 is any value among 2 cm, 2.5 cm, 3 cm, 3.5 cm, and 4 cm. The size and number of the material distribution holes can be set according to actual needs.

[0044] In one embodiment, the extension direction of the branch pipe 20 and the extension direction of the main pipe 10 may form an angle greater than 0 degrees. Figure 2 As shown, the extension direction of the branch pipe 20 is substantially perpendicular to the extension direction of the main pipe 10. Thus, multiple branch pipes can be distributed throughout the catalytic reaction area, and the gas phase distribution device can spray vaporized materials throughout the catalytic reaction area to avoid dead corners in the catalytic reaction area of ​​the catalytic reaction equipment.

[0045] In one embodiment, if Figure 2 As shown, each branch pipeline 20 can be symmetrically arranged relative to the main pipeline 10.

[0046] In one embodiment, the feed port 13 is located in the middle of the main pipeline 10, and the lengths of the multiple branch pipelines 20 gradually decrease along the direction from the feed port 13 to the end of the main pipeline 10. Such a structure can adapt to the circular catalytic reaction area, and the gas phase distribution device can be arranged in the circular catalytic reaction area formed by the circular converter head, thereby expanding the application range of the gas phase distribution device.

[0047] In one embodiment, if Figure 1 As shown, the gas phase distribution device may further include a nozzle 30, which is disposed on the material distribution hole 21 to spray the vaporized material. Spraying the vaporized material through the nozzle can expand the spray range of the vaporized material, which is conducive to the full contact between the vaporized material and the catalyst pipeline. Exemplarily, the nozzle 30 may be in the shape of an open spherical crown. Such a nozzle can expand the spray range and also play a certain role in contraction, thereby avoiding waste of materials due to excessive spray range.

[0048] Figure 3 Schematic diagram of a catalytic reaction device in one embodiment of the present application. Figure 3As shown, the catalytic reaction equipment may include a converter head 200 and the gas phase distribution device 100 in the above embodiment. The converter head 200 defines a catalytic reaction area, and the gas phase distribution device 100 is located in the converter head 200. The feed port 13 of the gas phase distribution device 100 is connected to the inlet of the converter head 200, so that the vaporized material entering from the inlet of the converter head 200 can enter the gas phase distribution device 100, and enter the catalytic reaction area after passing through the gas phase distribution device 100. The catalytic reaction equipment may also include a catalyst pipeline 300, which is used to hold the catalyst. The catalyst pipeline 300 is located in the catalytic reaction area, and the discharge port of the gas phase distribution device 100 faces the catalyst pipeline. Thereby, the vaporized material ejected from the gas phase distribution device can fully contact the catalyst in the catalyst pipeline, thereby improving the catalytic reaction conversion rate, avoiding the rapid pulverization and deactivation of the intermediate catalyst, and reducing the difficulty of catalyst replacement.

[0049] In one embodiment, if Figure 3 As shown, multiple catalyst pipes 300 are arranged in parallel and at intervals, the extension direction of the main pipe 10 is the same as the arrangement direction of the multiple catalyst pipes 300, and the main pipe 10 spans each catalyst pipe 300. Therefore, the vaporized material sprayed by the gas phase distribution device will cover each catalyst pipe, ensuring that the vaporized material can contact each catalyst pipe and that the catalyst in each catalyst pipe can complete the catalytic effect.

[0050] In one embodiment, the extension direction of the branch pipe is parallel to the extension direction of the catalyst pipe, so as to ensure that the vaporized material sprayed from the nozzle can cover the length range of the catalyst pipe.

[0051] The gas phase distribution device of the embodiment of the present application is used in a catalytic reaction device, and can fully divert and buffer the incoming vaporized material, so that the vaporized material sprayed out from the gas phase distribution device is uniform and the pressure is balanced, avoiding the formation of bias flow of the vaporized material on the surface of the catalyst pipeline, so that the vaporized material can fully contact the catalyst in the catalyst pipeline, thereby improving the conversion rate of the catalytic reaction, avoiding the rapid pulverization and deactivation of the intermediate catalyst, and reducing the difficulty of catalyst replacement.

[0052] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0056] The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numerals and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0057] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A gas phase distribution device, characterized in that: The invention comprises a main pipeline, wherein the main pipeline comprises: A partition plate is arranged in the inner cavity of the main pipeline to divide the inner cavity of the main pipeline into a first cavity and a second cavity. A feed port and a discharge port are opened on the wall of the main pipeline. The feed port is connected to the first cavity, and the discharge port is connected to the second cavity. The flow damper is located in the second cavity, the partition plate is provided with a first opening corresponding to the flow damper, the inner cavity of the flow damper is connected with the first cavity through the first opening, the cavity wall of the flow damper is provided with at least two second openings, and the inner cavity of the flow damper is connected with the second cavity through the at least two second openings.

2. The gas phase distribution device according to claim 1, characterized in that: The flow slower includes a first branch pipe and a second branch pipe connected to each other. The first branch pipe and the second branch pipe are connected to the first cavity through the first opening at the connection between the first branch pipe and the second branch pipe. The second opening is opened on the pipe wall of the first branch pipe and the pipe wall of the second branch pipe.

3. The gas phase distribution device according to claim 2, characterized in that: The first branch pipe and the second branch pipe are both curved, the first branch pipe and the second branch pipe are smoothly connected, and the first branch pipe and the second branch pipe are symmetrically arranged.

4. The gas phase distribution device according to claim 1, characterized in that: The number of the discharge ports is equal to the number of the flow dampers, and each of the discharge ports is arranged opposite to the first opening corresponding to each of the flow dampers.

5. The gas phase distribution device according to any one of claims 1 to 4, characterized in that: The gas phase distribution device also includes a plurality of branch pipes, each of which is connected to each of the discharge ports in a one-to-one manner, and a plurality of distribution holes arranged along the extension direction of the branch pipes are opened on the pipe wall of the branch pipes, and the extension direction of the branch pipes is perpendicular to the extension direction of the main pipe.

6. The gas phase distribution device according to claim 5, characterized in that: The feed inlet is located in the middle of the main pipeline, and along the direction from the feed inlet to the end of the main pipeline, the lengths of the plurality of branch pipelines gradually decrease.

7. The gas phase distribution device according to claim 5, characterized in that: The gas phase distribution device also includes a nozzle arranged on the material distribution hole to spray out the vaporized material.

8. The gas phase distribution device according to claim 7, characterized in that: The nozzle is in the shape of an open spherical crown.

9. A catalytic reaction device, characterized in that: It comprises a converter head and a gas phase distribution device according to any one of claims 1 to 8, wherein the feed port is connected to the inlet of the converter head, the catalytic reaction equipment further comprises a catalyst pipe for containing a catalyst, and the discharge port faces the catalyst pipe.

10. The device according to claim 9, characterized in that The plurality of catalyst pipes are arranged in parallel and at intervals, the extension direction of the main pipe is the same as the arrangement direction of the plurality of catalyst pipes, and the main pipe spans across each of the catalyst pipes.

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