Novel anti-backfire hydrogen catalytic combustion reactor

Abstract

The utility model discloses a novel anti-backfire hydrogen catalytic combustion reactor, which belongs to the technical field of industrial waste gas treatment, and comprises a reaction box, the top end of the reaction box is respectively and fixedly connected with a gas supply pipe for injecting waste gas and a discharge pipe for discharging standard gas, and one side of the bottom end of the reaction box is fixedly provided with a combustion pipe. The end, away from the reaction box, of the combustion pipe is fixedly connected with a combustor used for promoting combustion reaction, a fixing plate is fixedly installed in an inner cavity of the reaction box, the top end of the fixing plate is fixedly connected with a heat exchange pipe used for preheating waste gas, and the top end of the heat exchange pipe communicates with a discharging pipe. One side of the fixing plate is fixedly connected with a first catalysis plate and a second catalysis plate which are used for assisting efficient combustion of waste gas, the problem of backfire in equipment can be effectively solved by arranging a flow intercepting structure, waste gas flowing is cut off in time through attachment of a flow intercepting cover and a flow guiding opening, reverse spreading of flames is prevented, and the safety of the equipment and personnel is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial waste gas treatment, in particular to a novel anti-flashback hydrogen catalytic combustion reactor. Background Art

[0002] A hydrogen catalytic combustion reactor is a device that uses a catalyst to promote the efficient combustion of hydrogen and oxygen at a lower temperature. It is widely used in fuel cells, chemical industry, energy, environmental protection and other fields, and has the advantages of high efficiency, safety and environmental protection.

[0003] A Chinese patent discloses a catalytic combustion reactor (Announcement No. CN213272654U), which includes a reaction container, a feed pipe, a fan component, a filling mechanism, and a heat conduction mechanism. The reaction container has an exhaust port, the bottom end of the feed pipe extends into the reaction container, and the top end of the feed pipe extends out of the reaction container. The feed pipe is provided with a first opening for accessing methanol, a second opening for accessing hydrogen, and a third opening for accessing air at different positions. The fan blades of the fan component are installed in the container and used to introduce the gas into the reaction container along the feed pipe. The filling mechanism is used to fill the catalyst for catalyzing methanol combustion. The heat conduction mechanism is connected to the filling mechanism by heat conduction. The inside of the heat conduction mechanism is used to carry and circulate the heat carrier and heat the heat carrier. The gas path in the reaction container passes through the bottom end of the feed pipe, the filling mechanism, and the exhaust port in sequence.

[0004] Therefore, based on the above search and in combination with the existing ones, since flames will be generated during the catalytic combustion of hydrogen, when the flame propagation speed exceeds the gas flow rate, the flame will propagate back to the gas supply pipeline. However, this patent cannot cut off the gas injection in time after the flashback occurs. The flame may continue to spread to the gas supply system, causing the pipeline or gas storage equipment to explode, causing serious safety accidents, and even leading to equipment damage, casualties and environmental pollution. Utility Model Content

[0005] The utility model aims to provide a novel anti-flashback hydrogen catalytic combustion reactor to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A novel anti-backfire hydrogen catalytic combustion reactor comprises a reaction box, the top of which is respectively fixedly connected with an air supply pipe for injecting waste gas and an exhaust pipe for discharging qualified gas, a combustion pipe is fixedly installed on one side of the bottom end of the reaction box, and the end of the combustion pipe away from the reaction box is fixedly connected with a burner for promoting combustion reaction, a fixed plate is fixedly installed in the inner cavity of the reaction box, a heat exchange pipe for preheating waste gas is fixedly connected to the top of the fixed plate, and the top of the heat exchange pipe is connected to the exhaust pipe, and one side of the fixed plate is respectively fixedly connected with a catalytic plate 1 and a catalytic plate 2 for assisting efficient combustion of waste gas, and waste gas is injected through the air supply pipe, and after being preheated by the heat exchange pipe in the reaction box, the burner is used to cooperate with the catalytic plate 1 and the catalytic plate 2 for efficient catalytic combustion, and the qualified waste gas after combustion is discharged through the exhaust pipe;

[0008] The bottom end of the fixed plate is fixedly connected with a cut-off structure, and the cut-off structure is used to cut off the exhaust gas injection in time when backfire occurs to ensure the safety of the system. The inside of the air supply pipe is fixedly connected with a filtering structure for preliminarily removing exhaust gas dust.

[0009] As a further solution of the utility model, the intercepting structure includes an intercepting pipe, which is fixedly installed at the bottom end of the fixed plate, and the inner cavity of the intercepting pipe is fixedly installed with a fixed pipe for conveying exhaust gas, and the bottom end of the fixed pipe is fixedly connected with a guide port for guiding the flow of exhaust gas, and an intercepting cover for cutting off the flow at the bottom of the fixed pipe is installed below the guide port, and a gap is provided between the guide port and the intercepting cover for normal flow of exhaust gas. When backfire occurs at the bottom of the intercepting pipe, the impact force generated by the backfire pushes the intercepting cover upward to fit with the guide port, so that the gap between the two disappears, thereby achieving the purpose of blocking the fixed pipe.

[0010] As a further solution of the utility model, a movable tube is provided on the sliding sleeve of the outer surface of the fixed tube, and the movable tube is slidably connected to the inside of the intercepting tube, a return spring is fixedly installed on the bottom end of the movable tube, and the return spring is fixedly connected to the fixed tube, and a intercepting plug for further assisting in cutting off the exhaust gas injection is fixedly installed on the top end of the movable tube.

[0011] As a further solution of the utility model, a plurality of moving blocks for assisting the moving pipe to move smoothly are fixedly mounted on the outer wall of the moving pipe, and a moving groove for providing sliding of the moving block is opened on the inner wall of the intercepting pipe, and the moving block is located in the moving groove.

[0012] As a further solution of the utility model, three buffer plates for reducing the impact force of exhaust gas are fixedly installed on the inner wall of the fixed pipe. The three buffer plates increase the flow path of the gas in the fixed pipe, effectively reducing the thrust on the interception cover to facilitate subsequent interception operations.

[0013] As a further solution of the utility model, the intercepting structure also includes a shell, which is fixedly connected to the bottom end of the intercepting pipe, and the inner cavity of the shell is fixedly installed with a flame-blocking filter element for blocking flames, and the bottom end of the shell is fixedly connected to a connecting pipe.

[0014] As a further solution of the utility model, the filtering structure includes a filter box, the upper and lower ends of which are fixedly connected to the air supply pipe, and the inner cavity of the filter box is clamped with four groups of filter plates for filtering impurities in the exhaust gas. The four groups of filter plates are configured as activated carbon plates, and the sizes of the filter holes in the four groups are distributed in increasing order from top to bottom.

[0015] As a further solution of the utility model, one side of the filter box is hinged with an opening and closing plate through a hinge for easy replacement of the filter plate, and the opening and closing plate is sealed with the filter box through a sealing strip, a fixing block is fixedly installed on the outer wall of the opening and closing plate, and the outer wall of the filter box is rotatably connected with a buckle for improving the sealing effect of the filter box through a pin shaft, and the buckle is snap-connected to the fixing block.

[0016] As a further solution of the utility model, a fan for providing exhaust gas flow power is installed on one side of the burner, and the air outlet end of the fan is fixedly connected to the air supply pipe, the air intake end of the fan is fixedly connected to the air inlet pipe for conveying the exhaust gas, and the end of the air supply pipe close to the reaction box is fixedly connected to a diversion box for evenly distributing the exhaust gas.

[0017] As a further solution of the utility model, a partition is fixedly connected to the inner cavity of the reaction box, and the partition is fixedly sleeved on the outer wall of the heat exchange tube. The partition plays a role of space separation and helps to increase the flow path of the gas in the reaction box.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. When the utility model is used, the problem of internal backfire of the equipment can be effectively solved by setting the interception structure. The fit between the interception cover and the guide port is used to timely cut off the flow of exhaust gas to prevent the flame from propagating in the reverse direction. At the same time, the cooperation of the limit spring and the card block ensures that the interception cover is slowly reset to avoid sudden changes in airflow, further preventing the recurrence of backfire. The use of a double interception mechanism can reduce the risk of explosion caused by backfire and ensure the safety of equipment and personnel.

[0020] 2. When the utility model is used, the pressure sensor can automatically cut off the operation of the fan when the gas accumulates and the pressure rises due to the backfire, preventing the exhaust gas from continuing to be injected, effectively improving the automation level of the equipment and enhancing the safety of the equipment. In combination with the filtering structure, the equipment can also effectively remove impurities in the exhaust gas and reduce the impact force, ensuring that the system has stronger anti-backfire ability and stability while operating efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a new type of anti-flashback hydrogen catalytic combustion reactor.

[0022] Figure 2 It is a cross-sectional view of a reaction box in a new type of anti-flashback hydrogen catalytic combustion reactor.

[0023] Figure 3 It is a cross-sectional view of the intercepting structure in a novel anti-flashback hydrogen catalytic combustion reactor.

[0024] Figure 4 This is a disassembled diagram of the interception structure in a new type of anti-flashback hydrogen catalytic combustion reactor.

[0025] Figure 5 This is an expanded view of the filtering structure in a new type of anti-flashback hydrogen catalytic combustion reactor.

[0026] In the figure: 1, reaction box; 2, air supply pipe; 3, discharge pipe; 4, combustion pipe; 5, burner; 6, fixed plate; 7, heat exchange tube; 8, catalytic plate one; 9, catalytic plate two; 10, fan; 11, air inlet pipe; 12, diverter box; 13, partition; 141, intercepting pipe; 142, fixed pipe; 143, guide port; 144, intercepting cover; 145, limiting block; 146, clamping block; 147, limiting spring; 148, moving pipe; 149, reset spring; 1410, intercepting plug; 1411, moving block; 1412, buffer plate; 1413, housing; 1414, flame arresting filter element; 1415, connecting pipe; 151, filter box; 152, filter plate; 153, opening and closing plate; 154, fixing block; 155, buckle. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example 1: Please refer to Figure 1 , Figure 2A novel anti-backfire hydrogen catalytic combustion reactor comprises a reaction box 1, the top of which is fixedly connected with an air supply pipe 2 for injecting waste gas and an exhaust pipe 3 for discharging qualified gas, a combustion pipe 4 is fixedly installed on one side of the bottom end of the reaction box 1, and the end of the combustion pipe 4 away from the reaction box 1 is fixedly connected with a burner 5 for promoting combustion reaction, a fixed plate 6 is fixedly installed in the inner cavity of the reaction box 1, a heat exchange pipe 7 for preheating waste gas is fixedly connected to the top of the fixed plate 6, and the top of the heat exchange pipe 7 is connected to the exhaust pipe 3, and a catalyst plate 1 8 and a catalyst plate 2 9 for assisting efficient combustion of waste gas are fixedly connected to one side of the fixed plate 6, the waste gas is injected through the air supply pipe 2, and after the waste gas is preheated by the heat exchange pipe 7 in the reaction box 1, the burner 5 is used to cooperate with the catalyst plate 1 8 and the catalyst plate 2 9 for efficient catalytic combustion, and the qualified waste gas after combustion is discharged through the exhaust pipe 3;

[0029] The bottom end of the fixed plate 6 is fixedly connected with a cut-off structure, and the cut-off structure is used to cut off the exhaust gas injection in time when backfire occurs to ensure the safety of the system. The inside of the air supply pipe 2 is fixedly connected with a filtering structure for preliminarily removing exhaust gas dust.

[0030] Specifically, the air supply pipe 2 is located on one side of the exhaust pipe 3, the catalytic plate 1 8 and the catalytic plate 2 9 are both fixedly connected to the inner wall of the reaction box 1, and the catalytic plate 1 8 is located below the catalytic plate 2 9, and a plurality of heat exchange tubes 7 are provided and symmetrically and evenly distributed;

[0031] See also Figure 2 , Figure 3 , Figure 4 The intercepting structure includes an intercepting pipe 141, which is fixedly installed at the bottom end of the fixed plate 6 through a flange. A fixed pipe 142 for conveying exhaust gas is fixedly installed in the inner cavity of the intercepting pipe 141. A guide port 143 for guiding the flow of exhaust gas is fixedly connected to the bottom end of the fixed pipe 142. An intercepting cover 144 for cutting off the flow at the bottom of the fixed pipe 142 is installed below the guide port 143, and a gap is provided between the guide port 143 and the intercepting cover 144 for normal flow of exhaust gas. When tempering occurs at the bottom of the intercepting pipe 141, the impact force generated by the tempering pushes the intercepting cover 144 upward to fit with the guide port 143, so that the gap between the two disappears, thereby achieving the purpose of blocking the fixed pipe 142.

[0032] Specifically, the inner diameter of the bottom end of the guide port 143 is smaller than the inner diameter of the intercepting cover 144, and both sides of the outer wall of the intercepting cover 144 are fixedly connected with limit blocks 145 for limiting the position of the intercepting cover 144, and the interior of the intercepting tube 141 is provided with a limit groove for providing the limit block 145 with sliding, and the limit block 145 is located in the limit groove, and a clamping block 146 is installed in the limit groove, and the side of the clamping block 146 corresponding to the limit block 145 is provided with an inclined surface that can fit each other, and the end of the clamping block 146 away from the limit block 145 is fixedly installed with a limit spring 147 for auxiliary limit, and the limit spring 147 is fixedly connected to the intercepting tube 141;

[0033] More specifically, the elastic force generated by the two groups of limit springs 147 pushes the block 146 to make it tightly against the limit block 145, forming a stable limit on the intercepting cover 144 from both sides, ensuring that the intercepting cover 144 can also maintain a stable position when there is no impact force. When the intercepting cover 144 is pushed upward by the impact force, the limit block 145 is driven to move upward, thereby releasing the squeeze on the block 146, and the limit spring 147 pushes the block 146 to move, thereby causing a certain resistance to the downward reset of the intercepting cover 144, so as to ensure that when the impact force is reduced, the intercepting cover 144 can slowly separate from the guide port 143, so that the exhaust gas gradually flows out, avoiding the sudden change of airflow caused by the rapid reset of the intercepting cover 144, thereby effectively preventing the recurrence of backfire;

[0034] A movable tube 148 is slidably sleeved on the outer surface of the fixed tube 142, and the movable tube 148 is slidably connected to the inside of the intercepting tube 141, a return spring 149 is fixedly installed at the bottom end of the movable tube 148, and the return spring 149 is fixedly connected to the fixed tube 142, and a intercepting plug 1410 for further assisting in intercepting the exhaust gas injection is fixedly installed at the top end of the movable tube 148;

[0035] Specifically, the outer wall of the top end of the mobile tube 148 is provided with a plurality of air inlet grooves, the outer wall of the top end of the fixed tube 142 is provided with air delivery grooves having the same number as the air inlet grooves, the inner cavity of the intercepting tube 141 is provided with a flow groove for conveying the exhaust gas, and the intercepting plug 1410 is clamped in the flow groove, the inner diameter of the flow groove at the top end of the intercepting tube 141 is smaller than the inner diameter of the flow groove in the middle thereof, and the intercepting plug 1410 is arranged in a trapezoidal shape;

[0036] More specifically, in the initial state, the return spring 149 pushes the moving tube 148 to drive the intercepting plug 1410 to engage with the flow slot, so that the intercepting plug 1410 seals and blocks the flow slot, cutting off the flow of the exhaust gas. At the same time, the intercepting plug 1410 is set as a silicone pad to enhance the sealing performance of the intercepting plug 1410.

[0037] In the gas injection state, the thrust of the exhaust gas circulation is enhanced by the fan 10, thereby pushing the interception plug 1410 to drive the movable tube 148 to move downward, squeezing and contracting the return spring 149, so that the air inlet groove in the movable tube 148 is aligned with the air delivery groove in the fixed tube 142, so that the exhaust gas passes through the circulation groove, flows out of the fixed tube 142 through the air inlet groove and the air delivery groove, and contacts the combustion tube 4;

[0038] At the same time, a pressure sensor for sensing the gas transmission pressure is provided on the inner wall of the fixed pipe 142. When performing backfire interception, the bottom of the fixed pipe 142 does not exhaust gas, but gas continues to enter it, causing waste gas to accumulate and the pressure to increase. When the pressure sensor detects high pressure, it transmits a signal to the fan 10 to stop it from operating. The waste gas flows from high pressure to low pressure, causing waste gas to flow back. The downward pressure on the interception plug 1410 is reduced, and the reset spring 149 is used to push the movable pipe 148 upward, so that the interception plug 1410 is again engaged with the flow slot, thereby further achieving the purpose of waste gas interception.

[0039] A plurality of moving blocks 1411 for assisting the moving tube 148 to move smoothly are fixedly mounted on the outer wall of the moving tube 148, and a moving groove for providing sliding of the moving blocks 1411 is opened on the inner wall of the intercepting tube 141, and the moving blocks 1411 are located in the moving groove;

[0040] Three buffer plates 1412 for reducing the impact force of exhaust gas are fixedly installed on the inner wall of the fixed pipe 142. The three buffer plates 1412 separate the internal space of the fixed pipe 142, which helps to increase the flow path of the gas in the fixed pipe 142 and effectively reduce the thrust on the interception cover 144, so as to facilitate the subsequent interception operation;

[0041] The intercepting structure also includes an outer shell 1413, which is fixedly connected to the bottom end of the intercepting pipe 141 through a flange. A flame-blocking filter element 1414 for blocking flames is fixedly installed in the inner cavity of the outer shell 1413, and a connecting pipe 1415 is fixedly connected to the bottom end of the outer shell 1413 through a flange.

[0042] Example 2: Please refer to Figure 1 , Figure 5 , based on Example 1, the filtering structure includes a filter box 151, the upper and lower ends of the filter box 151 are fixedly connected to the air supply pipe 2 through pipes, and the inner cavity of the filter box 151 is clamped with four groups of filter plates 152 for filtering impurities in the exhaust gas, and the four groups of filter plates 152 are set as activated carbon plates, and the sizes of the filter holes in the four groups are distributed in increasing order from top to bottom;

[0043] One side of the filter box 151 is hinged with an opening and closing plate 153 for easy replacement of the filter plate 152, and the opening and closing plate 153 is sealed with the filter box 151 through a sealing strip, and the sealing strip is used to ensure the sealing inside the filter box 151. A fixing block 154 is fixedly installed on the outer wall of the opening and closing plate 153, and a buckle 155 for improving the sealing effect of the filter box 151 is rotatably connected to the outer wall of the filter box 151 through a pin shaft, and the buckle 155 is snap-connected with the fixing block 154.

[0044] See also Figure 1 , Figure 2 A fan 10 for providing exhaust gas flow power is installed on one side of the burner 5, and the air outlet end of the fan 10 is fixedly connected to the air supply pipe 2, and the air intake end of the fan 10 is fixedly connected to an air inlet pipe 11 for conveying exhaust gas, and one end of the air supply pipe 2 close to the reaction box 1 is fixedly connected to a diverter box 12 for evenly distributing the exhaust gas;

[0045] The inner cavity of the reaction box 1 is fixedly connected with a partition 13, and the partition 13 is fixedly sleeved on the outer wall of the heat exchange tube 7. The partition 13 plays a role of space separation, which helps to increase the flow path of the gas in the reaction box 1, so that the gas can more fully contact with the heat exchange tube 7, thereby improving the effect of heat exchange;

[0046] Specifically, the diverter box 12 is fixedly connected to the top surface of the reaction box 1 , and the top end of each heat exchange tube 7 is connected to the inside of the diverter box 12 , so that the exhaust gas is evenly distributed to each heat exchange tube 7 through the diverter box 12 .

[0047] The working principle of the utility model is:

[0048] First, the exhaust gas enters the fan 10 through the air inlet pipe 11. The fan 10 pressurizes the exhaust gas and sends it into the air supply pipe 2. The exhaust gas passes through four sets of activated carbon filter plates 152 in the filter box 151 to remove dust and impurities to ensure that the exhaust gas is clean;

[0049] The filtered exhaust gas enters the diverter box 12 and is evenly distributed to the multiple heat exchange tubes 7. The exhaust gas exchanges heat with the hot gas in the reaction box 1 in the heat exchange tube 7 to achieve preheating. The preheated exhaust gas pushes the interception plug 1410 to drive the movable tube 148 to move downward, so that the air inlet slot is aligned with the air delivery slot. The exhaust gas passes through the flow slot and flows out through the fixed tube 142 into the reaction box 1. Under the action of the burner 5, it contacts the catalyst plate 1 8 and the catalyst plate 2 9 to perform efficient catalytic combustion. Then, the qualified gas after combustion is discharged through the exhaust pipe 3.

[0050] When flashback occurs, the flashback impact force pushes the intercepting cover 144 upward to fit with the guide port 143, cutting off the exhaust gas flow, and cooperates with the limit spring 147 to push the block 146 and the limit block 145 to rub against each other, thereby generating resistance to the downward movement and reset of the intercepting cover 144, ensuring that the intercepting cover 144 is reset slowly, avoiding sudden changes in airflow, and preventing flashback from occurring again;

[0051] At the same time, since there is no exhaust at the bottom of the fixed pipe 142, when the pressure sensor inside it detects the high pressure of the gas accumulated inside the fixed pipe 142, it transmits a signal to the fan 10 to stop operating, and the exhaust gas refluxes. The shut-off plug 1410 moves up under the action of the return spring 149 to further shut off the exhaust gas.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A novel anti-flashback hydrogen catalytic combustion reactor, comprising a reaction box (1), characterized in that: The top of the reaction box (1) is fixedly connected to an air supply pipe (2) for injecting waste gas and an exhaust pipe (3) for discharging qualified gas, a combustion pipe (4) is fixedly installed on one side of the bottom of the reaction box (1), and the end of the combustion pipe (4) away from the reaction box (1) is fixedly connected to a burner (5) for promoting the combustion reaction, the inner cavity of the reaction box (1) is fixedly installed with a fixing plate (6), the top of the fixing plate (6) is fixedly connected to a heat exchange pipe (7) for preheating the waste gas, and the top of the heat exchange pipe (7) is connected to the exhaust pipe (3), and one side of the fixing plate (6) is fixedly connected to a catalytic plate 1 (8) and a catalytic plate 2 (9) for assisting the efficient combustion of the waste gas; The bottom end of the fixed plate (6) is fixedly connected to a cut-off structure, and the cut-off structure is used to promptly cut off the injection of exhaust gas when flashback occurs, thereby ensuring system safety. The interior of the air supply pipe (2) is fixedly connected to a filtering structure for preliminarily removing exhaust gas dust.

2. A novel anti-flashback hydrogen catalytic combustion reactor according to claim 1, characterized in that: The intercepting structure comprises an intercepting pipe (141), the intercepting pipe (141) being fixedly mounted on the bottom end of the fixing plate (6), the inner cavity of the intercepting pipe (141) being fixedly mounted with a fixing pipe (142) for conveying waste gas, the bottom end of the fixing pipe (142) being fixedly connected with a guide port (143) for guiding the flow of waste gas, an intercepting cover (144) for intercepting the flow at the bottom of the fixing pipe (142) being mounted below the guide port (143), and a gap being provided between the guide port (143) and the intercepting cover (144) for normal flow of waste gas, and when tempering occurs at the bottom of the intercepting pipe (141), the impact force generated by the tempering pushes the intercepting cover (144) upwards to fit with the guide port (143), so that the gap between the two disappears, thereby achieving the purpose of blocking the fixing pipe (142).

3. A novel anti-flashback hydrogen catalytic combustion reactor according to claim 2, characterized in that: The outer surface of the fixed tube (142) is slidably sleeved with a movable tube (148), and the movable tube (148) is slidably connected to the inside of the intercepting tube (141), a return spring (149) is fixedly mounted on the bottom end of the movable tube (148), and the return spring (149) is fixedly connected to the fixed tube (142), and a intercepting plug (1410) for further assisting in intercepting exhaust gas injection is fixedly mounted on the top end of the movable tube (148).

4. A novel anti-flashback hydrogen catalytic combustion reactor according to claim 3, characterized in that: A plurality of moving blocks (1411) for assisting the moving tube (148) to move smoothly are fixedly mounted on the outer wall of the moving tube (148), and a moving groove for providing sliding for the moving blocks (1411) is formed on the inner wall of the intercepting tube (141), and the moving blocks (1411) are located in the moving groove.

5. A novel anti-flashback hydrogen catalytic combustion reactor according to claim 2, characterized in that: Three buffer plates (1412) for reducing the impact force of exhaust gas are fixedly mounted on the inner wall of the fixed pipe (142). The three buffer plates (1412) increase the flow path of the gas in the fixed pipe (142), effectively reducing the thrust on the interception cover (144), so as to facilitate subsequent interception operations.

6. A novel anti-flashback hydrogen catalytic combustion reactor according to claim 2, characterized in that: The intercepting structure further comprises an outer shell (1413), the outer shell (1413) being fixedly connected to the bottom end of the intercepting pipe (141), a flame-blocking filter element (1414) for blocking flames being fixedly installed in the inner cavity of the outer shell (1413), and a connecting pipe (1415) being fixedly connected to the bottom end of the outer shell (1413).

7. The novel anti-flashback hydrogen catalytic combustion reactor according to claim 1 is characterized in that: The filtering structure comprises a filter box (151), the upper and lower ends of the filter box (151) are fixedly connected to the air supply pipe (2), the inner cavity of the filter box (151) is clamped with four groups of filter plates (152) for filtering impurities in the exhaust gas, the four groups of filter plates (152) are configured as activated carbon plates, and the sizes of the filter holes in the four groups are distributed in increasing order from top to bottom.

8. The novel anti-flashback hydrogen catalytic combustion reactor according to claim 7 is characterized in that: An opening and closing plate (153) is hingedly connected to one side of the filter box (151) via a hinge for facilitating replacement of the filter plate (152), and the opening and closing plate (153) is sealedly connected to the filter box (151) via a sealing strip, a fixing block (154) is fixedly mounted on the outer wall of the opening and closing plate (153), and a buckle (155) for improving the sealing effect of the filter box (151) is rotatably connected to the outer wall of the filter box (151) via a pin shaft, and the buckle (155) is snap-connected to the fixing block (154).

9. The novel anti-flashback hydrogen catalytic combustion reactor according to claim 1 is characterized in that: A fan (10) for providing exhaust gas flow power is installed on one side of the burner (5), and the exhaust end of the fan (10) is fixedly connected to the air supply pipe (2), the suction end of the fan (10) is fixedly connected to an air inlet pipe (11) for conveying exhaust gas, and the end of the air supply pipe (2) close to the reaction box (1) is fixedly connected to a diverter box (12) for evenly distributing the exhaust gas.

10. The novel anti-flashback hydrogen catalytic combustion reactor according to claim 1 is characterized in that: The inner cavity of the reaction box (1) is fixedly connected to a partition (13), and the partition (13) is fixedly sleeved on the outer wall of the heat exchange tube (7). The partition (13) plays a role of spatial separation, which helps to increase the flow path of the gas in the reaction box (1).

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