Tail gas treatment system based on catalytic oxidation

Abstract

The invention belongs to the technical field of tail gas treatment, and discloses a tail gas treatment system based on catalytic oxidation, which comprises a catalytic tank, the rear end of the catalytic tank is fixedly communicated with a reaction tank, the front end of the catalytic tank is fixedly communicated with a gas inlet tank, and a catalyst bed is mounted in the catalytic tank through bolts. The rear end of the reaction tank is fixedly communicated with a discharge tank, the rear end of the discharge tank is fixedly communicated with a discharge assembly, and a power assembly is arranged between the discharge tank and the discharge assembly. Tail gas generated during tail gas treatment is utilized, exhausted tail gas is guided into the power assembly, the mounting plate and the dredging rod are pushed to move through the action of the power assembly, the self-dredging process is achieved, the whole process does not need assistance of external power, and opening and closing of different valves are controlled; the device can be maintained on line, shutdown treatment is not needed, the maintenance efficiency is remarkably improved, and the influence on the treatment efficiency is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of tail gas treatment, and in particular relates to a tail gas treatment system based on catalytic oxidation. Background Art

[0002] The catalytic oxidation tail gas treatment system is a highly efficient tail gas purification technology that uses catalysts to reduce the activation energy of chemical reactions, thereby promoting the oxidation reaction of harmful substances in the tail gas at a lower temperature and converting them into harmless or low-toxic substances. The working principle of the catalytic oxidation tail gas treatment system is mainly based on the catalytic action of the catalyst. When the tail gas passes through the catalyst, the active sites on the catalyst surface will adsorb harmful substances in the tail gas, such as volatile organic compounds (VOCs), carbon monoxide (CO) and nitrogen oxides (NOx). Then, under the action of the catalyst, these harmful substances undergo an oxidation reaction with oxygen and are converted into harmless substances such as carbon dioxide (CO2), water (H2O) and nitrogen (N2).

[0003] When catalytic oxidation is used to treat exhaust gas, the main treatment method is the contact between the catalyst bed and the exhaust gas. After the dust removal treatment at the front end, the exhaust gas will enter the catalytic tank and be treated by the catalyst bed. However, after a long period of treatment, the catalyst bed will become clogged to a certain extent. In order to prevent the blockage from interfering with the exhaust gas treatment, the existing technology often shuts down for maintenance, and cannot perform online automatic maintenance, which can easily affect the treatment efficiency.

[0004] At the same time, during the exhaust gas treatment, due to the treatment of the catalyst, some impurities will adhere to the vicinity of the catalyst bed, which will reduce the contact between the exhaust gas and the catalyst bed, thereby affecting the normal catalysis of the catalyst bed and having a great impact on the overall treatment quality. Summary of the Invention

[0005] The object of the present invention is to provide an exhaust gas treatment system based on catalytic oxidation to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: A tail gas treatment system based on catalytic oxidation, comprising a catalytic tank, wherein the rear end of the catalytic tank is fixedly connected to a reaction tank, the front end of the catalytic tank is fixedly connected to an air intake tank, a catalyst bed is installed inside the catalytic tank by bolts, the rear end of the reaction tank is fixedly connected to an exhaust tank, the rear end of the exhaust tank is fixedly connected to an exhaust assembly, a power assembly is provided between the exhaust tank and the exhaust assembly, the front end of the power assembly is connected to the rear end of the exhaust tank, and the rear end of the power assembly is connected to the exhaust assembly, a heating pipe is fixedly sleeved on the outer side of the catalytic tank, auxiliary dredging assemblies are installed at the upper and lower ends of the heating pipe, the top end of the auxiliary dredging assembly is fixedly connected to an air supply pipe, and the other end of the air supply pipe is connected to the exhaust assembly, a mounting plate is provided inside the reaction tank, a dredging rod is fixedly installed at the front end of the mounting plate in a circumferential shape, and the dredging rod is adapted to a hole opened on the surface of the catalyst bed, the front end of the power assembly passes through the front end of the exhaust tank and is connected to the middle part of the rear end of the mounting plate, and the front end of the air intake tank is connected to an external dust removal device.

[0007] Before exhaust gas treatment, the exhaust gas can be treated by an external dust removal device and then connected to the air inlet tank. At the same time, it is necessary to ensure that the catalyst bed is in an unblocked state and that the catalyst is in the best condition to complete the preparations before treatment.

[0008] As a further technical solution of the present invention, the exhaust assembly includes an exhaust tank, and the left and right sides of the front end of the exhaust tank are fixedly connected with exhaust pipes, and the other end of the exhaust pipe is connected to the left and right sides of the rear end of the exhaust tank.

[0009] As a further technical solution of the present invention, a discharge valve is fixedly connected to the middle of the rear end of the exhaust tank, a return valve is fixedly connected to the middle of the front end of the exhaust tank, and the front end of the return valve is connected to the power assembly.

[0010] The exhaust gas enters the interior of the catalytic tank through the air inlet tank and contacts the catalyst bed for treatment. At the same time, it enters the interior of the reaction tank through the holes opened on the catalyst bed, and the heating pipe can be opened simultaneously to heat the exhaust gas to promote the reaction. The exhaust gas after treatment can enter the interior of the emission tank. When the exhaust gas is in the treatment state, the emission valve can be kept in the open state and the reflux valve can be kept in the closed state. At this time, the exhaust gas can be transported into the exhaust tank through the emission pipe and discharged through the emission valve to complete the exhaust gas treatment process.

[0011] As a further technical solution of the present invention, the power assembly includes a fixed pipe, the front end of the fixed pipe is connected to the rear end of the discharge tank, the rear end of the fixed pipe is fixedly connected to a four-way valve, and the rear end of the four-way valve is connected to the reflux valve.

[0012] As a further technical solution of the present invention, the upper and lower ends of the four-way valve are respectively connected to the two air pipes, and the first piston plate is movably sleeved inside the fixed tube. The first piston plate is displaced forward and backward relative to the fixed tube, and the front end of the first piston plate is fixedly connected to the first piston rod located inside the fixed tube.

[0013] As a further technical solution of the present invention, the front end of the first piston rod passes through the front end of the fixed pipe and the rear end of the discharge tank in sequence and is connected to the middle part of the rear end of the mounting plate. The outer side surface of the first piston rod is movably sleeved with a limit spring, and the upper and lower ends of the limit spring are respectively connected to one end of the first piston plate and one end of the fixed pipe.

[0014] If the catalyst bed is clogged, the reflux valve can be opened and the discharge valve can be closed, and the device can be switched to maintenance mode. The exhaust gas generated at this time cannot be discharged through the discharge valve, and flows through the reflux valve to the inside of the four-way valve. At this time, part of the exhaust gas can be discharged through the front end of the four-way valve and enter the interior of the fixed pipe, and a forward thrust is applied to the first piston plate. At this time, the limit spring is compressed and drives the first piston rod forward, and pushes the mounting plate forward until the dredging rod is driven forward. At this time, the dredging rod can be inserted into the hole of the catalyst bed to complete the self-dredging process.

[0015] By utilizing the exhaust gas generated during exhaust gas treatment, the discharged exhaust gas is introduced into the interior of the power component, and the power component drives the installation plate and the dredging rod to move, thereby realizing a self-dredging process. The entire process does not require external power assistance, and only requires controlling the opening and closing of different valves, so that the device can be maintained online without the need for shutdown processing, which significantly improves maintenance efficiency and reduces the impact on processing efficiency.

[0016] As a further technical solution of the present invention, inspection openings are provided at positions near the front and rear sides of the bottom end of the catalytic tank, and inspection covers are threadedly sleeved at the bottom ends of the inspection openings.

[0017] As a further technical solution of the present invention, the auxiliary dredging component includes a mounting bracket, which is connected to the outer side of the heating pipe, and the inner side of the mounting bracket is fixedly sleeved with an adjusting tube, the top of the adjusting tube is connected to the gas pipe, and the inside of the adjusting tube is movably sleeved with a second piston plate, and the bottom end of the second piston plate is fixedly connected to a second piston rod located inside the adjusting tube.

[0018] As a further technical solution of the present invention, the bottom end of the second piston rod passes through the bottom end of the mounting bracket and is fixedly connected to an impact ball located on the outer side of the heating tube. The outer side of the second piston rod is movably sleeved with a return spring. The upper and lower ends of the return spring are respectively connected to one end of the second piston plate and one end of the adjusting tube. An extension piece is fixedly sleeved on the outer side of the second piston rod near the bottom end.

[0019] At the same time, when maintaining the device, the exhaust gas discharged through the four-way valve can be transported to the inside of the regulating pipe through the air pipe. At this time, downward pressure can be applied to the second piston plate. At this time, the return spring is compressed, and drives the second piston rod and the impact ball to move downward. When the return spring is compressed to the limit position, the impact ball moves to the lowest point and contacts the surface of the heating tube and collides with it, causing the heating tube and the catalytic tank to vibrate. At this time, impurities adhering to the inner wall of the catalytic tank are shaken off. At this time, by opening the inspection cover, the impurities can be discharged through the inspection port, completing the self-maintenance process inside the catalytic tank.

[0020] By reusing the tail gas generated during tail gas treatment, the catalyst bed can be self-cleaned. At the same time, the pressure of the tail gas can also be used to achieve self-vibration of the catalyst tank, thereby removing adhered impurities and completing the maintenance process quickly. The entire process is synchronous and complete, avoiding the influence of adhered impurities on normal catalysis and improving the quality of tail gas treatment.

[0021] As a further technical solution of the present invention, the front end of the extension piece is fixedly connected to an extension frame, and a sealing cover plate is fixedly installed at the bottom end of the extension frame. The two sealing cover plates are located on the upper and lower sides of the front end of the air intake tank. When the reset spring is in the initial state, the sealing cover plate does not block the front end of the air intake tank. When the reset spring is in the extreme compression state, the two sealing cover plates are in contact with each other at one end and block the front of the air intake tank.

[0022] At the same time, during the maintenance of the device, due to the downward movement of the second piston rod, the extension piece can be driven downward, and the extension frame and the sealing cover plate can be driven downward simultaneously. When the bottom end of the impact ball collides with the outer side of the heating tube, the extension piece will drop to the lowest point, and drive the extension frame and the sealing cover plate to drop to the lowest point. At this time, the two sealing covers can contact each other and completely block the front end of the air inlet tank, completing the automatic cutting off of the exhaust gas input.

[0023] By utilizing the exhaust gas output during exhaust gas treatment and cooperating with the maintenance process of the device, the device can automatically complete the catalyst bed clearing and catalyst tank self-maintenance, and can also realize the automatic cutting off of the exhaust gas input. The whole process is completed automatically, which can effectively avoid the problem of unmanageable exhaust gas continuous input during device maintenance, thereby improving the practicality of the device.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The present invention utilizes the exhaust gas generated during exhaust gas treatment to introduce the discharged exhaust gas into the interior of the power component, and uses the power component to push the mounting plate and the dredging rod to move, thereby realizing a self-dredging process. The entire process does not require external power assistance, and only needs to control the opening and closing of different valves, so that the device can be maintained online without the need for shutdown processing, which significantly improves maintenance efficiency and reduces the impact on processing efficiency.

[0026] 2. The present invention reuses the tail gas generated during the tail gas treatment to achieve self-dredging of the catalyst bed. At the same time, the catalyst tank can be self-vibrated by the pressure of the tail gas, thereby removing adhered impurities and quickly completing the maintenance process. The entire process is synchronous and complete, avoiding the influence of adhered impurities on normal catalysis and improving the quality of tail gas treatment.

[0027] 3. The present invention utilizes the exhaust gas output during exhaust gas treatment and cooperates with the maintenance process of the device, so that the device can automatically complete the catalyst bed clearing and catalyst tank self-maintenance, and can also realize the automatic cutting off of the exhaust gas input. The whole process is completed automatically, which can effectively avoid the problem of continuous exhaust gas input that cannot be handled during device maintenance, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the coordination of the gas pipe, the extension frame, and the auxiliary dredging assembly structure of the present invention;

[0030] Figure 3 It is a cross-sectional schematic diagram of the internal structure of the auxiliary dredging component of the present invention;

[0031] Figure 4 It is a cross-sectional schematic diagram of the internal structure of the catalyst tank and the reaction tank of the present invention;

[0032] Figure 5 This is a schematic diagram of the coordination of the discharge tank, power assembly, and discharge assembly structure of the present invention;

[0033] Figure 6 It is a partial cross-sectional schematic diagram of the discharge tank, power assembly and discharge assembly structure of the present invention;

[0034] Figure 7 It is a separate cross-sectional schematic diagram of the internal structure of the power assembly of the present invention;

[0035] Figure 8 for Figure 4 A magnified schematic diagram of the structure at center A.

[0036] In the figure: 1. Catalytic tank; 2. Reaction tank; 3. Air inlet tank; 4. Inspection port; 5. Inspection cover; 6. Catalyst bed; 7. Drain tank; 8. Mounting plate; 9. Dredging rod; 10. Power assembly; 101. Fixed pipe; 102. First piston plate; 103. First piston rod; 104. Limit spring; 105. Four-way valve; 11. Drain assembly; 111. Exhaust tank; 112. Drain pipe; 113. Drain valve; 114. Return valve; 12. Air supply pipe; 13. Extension rack; 14. Sealing cover; 15. Auxiliary dredging assembly; 151. Mounting rack; 152. Adjusting pipe; 153. Second piston plate; 154. Second piston rod; 155. Impact ball; 156. Extension piece; 157. Return spring; 16. Heating tube. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] like Figures 1 to 8 As shown, in the embodiment of the present invention, a tail gas treatment system based on catalytic oxidation includes a catalytic tank 1, the rear end of the catalytic tank 1 is fixedly connected to the reaction tank 2, the front end of the catalytic tank 1 is fixedly connected to the air intake tank 3, the interior of the catalytic tank 1 is fixedly installed with a catalyst bed 6 by bolts, the rear end of the reaction tank 2 is fixedly connected to the exhaust tank 7, the rear end of the exhaust tank 7 is fixedly connected to the exhaust assembly 11, a power assembly 10 is provided between the exhaust tank 7 and the exhaust assembly 11, the front end of the power assembly 10 is connected to the rear end of the exhaust tank 7, the rear end of the power assembly 10 is connected to the exhaust assembly 11, and the catalytic A heating pipe 16 is fixedly sleeved on the outer side of the tank 1, and auxiliary dredging components 15 are installed at the upper and lower ends of the heating pipe 16. The top of the auxiliary dredging component 15 is fixedly connected to the gas pipe 12, and the other end of the gas pipe 12 is connected to the emission component 11. A mounting plate 8 is provided inside the reaction tank 2, and a dredging rod 9 is fixedly installed on the front end of the mounting plate 8 in a circular shape. The dredging rod 9 is adapted to the holes opened on the surface of the catalyst bed 6. The front end of the power component 10 passes through the front end of the emission tank 7 and is connected to the middle part of the rear end of the mounting plate 8. The front end of the air inlet tank 3 is connected to the external dust removal device.

[0039] Before exhaust gas treatment, the exhaust gas can be treated by an external dust removal device and then connected to the air inlet tank 3. At the same time, it is necessary to ensure that the catalyst bed 6 is in an unblocked state and that the catalyst is in the best state to complete the preparations before treatment.

[0040] like Figure 1 and Figure 4 as well as Figure 6 As shown, the exhaust component 11 includes an exhaust tank 111, and the left and right sides of the front end of the exhaust tank 111 are fixedly connected with an exhaust pipe 112, the other end of the exhaust pipe 112 is connected to the left and right sides of the rear end of the exhaust tank 7, the middle of the rear end of the exhaust tank 111 is fixedly connected with an exhaust valve 113, and the middle of the front end of the exhaust tank 111 is fixedly connected with a return valve 114, and the front end of the return valve 114 is connected to the power component 10.

[0041] The exhaust gas enters the interior of the catalytic tank 1 through the air inlet tank 3, and contacts the catalyst bed 6 for treatment. At the same time, it enters the interior of the reaction tank 2 through the holes opened on the catalyst bed 6, and the heating tube 16 can be opened synchronously to heat the exhaust gas to promote the reaction. The exhaust gas after treatment can enter the interior of the exhaust tank 7, and when the exhaust gas is in the treatment state, the exhaust valve 113 can be kept in the open state, and the reflux valve 114 can be kept in the closed state. At this time, the exhaust gas can be transported into the interior of the exhaust tank 111 through the exhaust pipe 112, and discharged through the exhaust valve 113 to complete the exhaust gas treatment process.

[0042] like Figure 1 and Figure 4 as well as Figure 6 and Figure 7 As shown, the power assembly 10 includes a fixed pipe 101, the front end of the fixed pipe 101 is connected to the rear end of the discharge tank 7, the rear end of the fixed pipe 101 is fixedly connected to a four-way valve 105, the rear end of the four-way valve 105 is connected to the return valve 114, the upper and lower ends of the four-way valve 105 are respectively connected to the two gas pipes 12, and the interior of the fixed pipe 101 is movably sleeved with a first piston plate 102, which moves back and forth relative to the fixed pipe 101, and the front end of the first piston plate 102 is fixedly connected to a first piston rod 103 located inside the fixed pipe 101, the front end of the first piston rod 103 passes through the front end of the fixed pipe 101 and the rear end of the discharge tank 7 in sequence and is connected to the middle part of the rear end of the mounting plate 8, the outer side of the first piston rod 103 is movably sleeved with a limit spring 104, and the upper and lower ends of the limit spring 104 are respectively connected to one end of the first piston plate 102 and one end of the fixed pipe 101.

[0043] Example: If the catalyst bed 6 is blocked, the return valve 114 can be opened and the discharge valve 113 can be closed, and the device can be switched to maintenance mode. At this time, the exhaust gas generated cannot be discharged through the discharge valve 113, and flows through the return valve 114 to the inside of the four-way valve 105. At this time, part of the exhaust gas can be discharged through the front end of the four-way valve 105 and enter the interior of the fixed pipe 101, and apply a forward thrust to the first piston plate 102. At this time, the limit spring 104 is compressed and drives the first piston rod 103 to move forward, and pushes the mounting plate 8 forward until the dredging rod 9 is driven to move forward. At this time, the dredging rod 9 can be inserted into the hole of the catalyst bed 6 to complete the self-dredging process.

[0044] By utilizing the exhaust gas generated during exhaust gas treatment, the discharged exhaust gas is introduced into the interior of the power component 10, and the power component 10 pushes the mounting plate 8 and the dredging rod 9 to move, thereby realizing a self-dredging process. The entire process does not require external power assistance, and only requires controlling the opening and closing of different valves, so that the device can be maintained online without the need for shutdown processing, which significantly improves maintenance efficiency and reduces the impact on processing efficiency.

[0045] like Figure 1 and Figure 2 as well as Figure 3 and Figure 8 As shown, an inspection port 4 is provided at the bottom of the catalytic tank 1 near the front and rear sides, and an inspection cover 5 is threadedly sleeved at the bottom end of the inspection port 4. The auxiliary dredging component 15 includes a mounting bracket 151, which is connected to the outer side of the heating pipe 16. The inner side of the mounting bracket 151 is fixedly sleeved with a regulating pipe 152, and the top of the regulating pipe 152 is connected to the gas pipe 12. The inside of the regulating pipe 152 is movably sleeved with a second piston plate 153, and the bottom end of the second piston plate 153 is fixedly connected There is a second piston rod 154 located inside the adjusting tube 152. The bottom end of the second piston rod 154 passes through the bottom end of the mounting bracket 151 and is fixedly connected to the impact ball 155 located on the outer side of the heating tube 16. The outer side of the second piston rod 154 is movably sleeved with a return spring 157. The upper and lower ends of the return spring 157 are respectively connected to one end of the second piston plate 153 and one end of the adjusting tube 152. An extension piece 156 is fixedly sleeved on the outer side of the second piston rod 154 near the bottom end.

[0046] Embodiment: When the device is being maintained, the exhaust gas discharged through the four-way valve 105 can be transported to the inside of the regulating tube 152 through the gas pipe 12. At this time, downward pressure can be applied to the second piston plate 153. At this time, the return spring 157 is compressed and drives the second piston rod 154 and the impact ball 155 to move downward. When the return spring 157 is compressed to the limit position, the impact ball 155 moves to the lowest point and contacts the surface of the heating tube 16 and collides with it, causing the heating tube 16 and the catalyst tank 1 to vibrate. At this time, impurities adhering to the inner wall of the catalyst tank 1 are shaken off. At this time, by opening the inspection cover 5, the impurities can be discharged through the inspection port 4, completing the self-maintenance process inside the catalyst tank 1.

[0047] By reusing the tail gas generated during the tail gas treatment, the catalyst bed 6 can be self-dredge, and the catalyst tank 1 can be self-vibrated by the pressure of the tail gas, so that the adhered impurities can be removed and the maintenance process can be completed quickly. The whole process is synchronous and complete, avoiding the influence of adhered impurities on normal catalysis and improving the quality of tail gas treatment.

[0048] like Figure 1 and Figure 2 as well as Figure 3 As shown, the front end of the extension member 156 is fixedly connected to the extension frame 13, and the bottom end of the extension frame 13 is fixedly installed with a sealing cover plate 14. The two sealing cover plates 14 are located on the upper and lower sides of the front end of the air intake tank 3. When the reset spring 157 is in the initial state, the sealing cover plate 14 does not block the front end of the air intake tank 3. When the reset spring 157 is in the extreme compression state, the two sealing cover plates 14 are in contact with each other at one end and block the front of the air intake tank 3.

[0049] At the same time, during the maintenance of the device, due to the downward movement of the second piston rod 154, the extension piece 156 can be driven downward, and the extension frame 13 and the sealing cover plate 14 can be driven downward simultaneously. When the bottom end of the impact ball 155 collides with the outer side surface of the heating tube 16, the extension piece 156 will drop to the lowest point, and drive the extension frame 13 and the sealing cover plate 14 to drop to the lowest point. At this time, the two sealing cover plates 14 can contact each other and completely block the front end of the air inlet tank 3, completing the automatic cutting off of the exhaust gas input.

[0050] By utilizing the exhaust gas output during exhaust gas treatment and cooperating with the maintenance process of the device, the device can automatically complete the clearing of the catalyst bed 6 and the self-maintenance of the catalyst tank 1, and can also realize the automatic cutting off of the exhaust gas input. The whole process is completed automatically, which can effectively avoid the problem of continuous exhaust gas input that cannot be handled during device maintenance, thereby improving the practicality of the device.

[0051] Working principle and usage process:

[0052] Before the exhaust gas is treated, the exhaust gas can be treated by an external dust removal device and then connected to the air inlet tank 3. At the same time, it is necessary to ensure that the catalyst bed 6 is not blocked and the catalyst is in the best condition to complete the preparation before treatment;

[0053] The tail gas enters the interior of the catalytic tank 1 through the air inlet tank 3 and contacts the catalyst bed 6 for treatment. At the same time, it enters the interior of the reaction tank 2 through the holes opened on the catalyst bed 6. The heating tube 16 can be opened synchronously to heat the tail gas to promote the reaction. The tail gas after treatment can enter the interior of the discharge tank 7. When the tail gas is in the treatment state, the discharge valve 113 can be kept in the open state and the reflux valve 114 can be kept in the closed state. At this time, the tail gas can be transported into the exhaust tank 111 through the discharge pipe 112 and discharged through the discharge valve 113, completing the tail gas treatment process.

[0054] If the catalyst bed 6 is clogged, the reflux valve 114 can be opened and the discharge valve 113 can be closed, and the device can be switched to maintenance mode. At this time, the exhaust gas generated cannot be discharged through the discharge valve 113, and flows into the inside of the four-way valve 105 through the reflux valve 114. At this time, part of the exhaust gas can be discharged through the front end of the four-way valve 105 and enter the interior of the fixed pipe 101, and exert a forward thrust on the first piston plate 102. At this time, the limit spring 104 is compressed, and drives the first piston rod 103 to move forward, and pushes the mounting plate 8 forward until the dredging rod 9 is driven forward. At this time, the dredging rod 9 can be inserted into the hole of the catalyst bed 6 to complete the self-dredging process;

[0055] At the same time, when the device is being maintained, the exhaust gas discharged through the four-way valve 105 can be transported to the inside of the regulating pipe 152 through the gas pipe 12. At this time, downward pressure can be applied to the second piston plate 153. At this time, the return spring 157 is compressed, and the second piston rod 154 and the impact ball 155 are driven downward. When the return spring 157 is compressed to the limit position, the impact ball 155 moves to the lowest point and contacts the surface of the heating tube 16, colliding with it, causing the heating tube 16 and the catalyst tank 1 to vibrate. At this time, impurities adhering to the inner wall of the catalyst tank 1 are shaken off. At this time, by opening the inspection cover 5, the impurities can be discharged through the inspection port 4, completing the self-maintenance process inside the catalyst tank 1;

[0056] At the same time, during the maintenance of the device, due to the downward movement of the second piston rod 154, the extension piece 156 can be driven downward, and the extension frame 13 and the sealing cover plate 14 can be driven downward simultaneously. When the bottom end of the impact ball 155 collides with the outer side surface of the heating tube 16, the extension piece 156 will drop to the lowest point, and drive the extension frame 13 and the sealing cover plate 14 to drop to the lowest point. At this time, the two sealing cover plates 14 can contact each other and completely block the front end of the air inlet tank 3, completing the automatic cutting off of the exhaust gas input.

[0057] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A tail gas treatment system based on catalytic oxidation, comprising a catalytic tank (1), characterized in that: The rear end of the catalytic tank (1) is fixedly connected to the reaction tank (2), the front end of the catalytic tank (1) is fixedly connected to the air intake tank (3), a catalyst bed (6) is installed inside the catalytic tank (1) by bolts, the rear end of the reaction tank (2) is fixedly connected to the emission tank (7), the rear end of the emission tank (7) is fixedly connected to the emission assembly (11), a power assembly (10) is arranged between the emission tank (7) and the emission assembly (11), the front end of the power assembly (10) is connected to the rear end of the emission tank (7), the rear end of the power assembly (10) is connected to the emission assembly (11), and the outer side surface of the catalytic tank (1) is fixedly sleeved with a heating pipe ( 16), the upper and lower ends of the heating tube (16) are both equipped with auxiliary dredging components (15), the top end of the auxiliary dredging component (15) is fixedly connected to the gas supply pipe (12), the other end of the gas supply pipe (12) is connected to the discharge component (11), the interior of the reaction tank (2) is provided with a mounting plate (8), the front end of the mounting plate (8) is fixedly equipped with a dredging rod (9) in a circular shape, the dredging rod (9) is adapted to the hole opened on the surface of the catalyst bed (6), the front end of the power component (10) passes through the front end of the discharge tank (7) and is connected to the middle part of the rear end of the mounting plate (8), and the front end of the air inlet tank (3) is connected to an external dust removal device.

2. The exhaust gas treatment system based on catalytic oxidation according to claim 1, characterized in that: The discharge assembly (11) comprises an exhaust tank (111), the left and right sides of the front end of the exhaust tank (111) are fixedly connected to an exhaust pipe (112), and the other end of the exhaust pipe (112) is connected to the left and right sides of the rear end of the exhaust tank (7).

3. The exhaust gas treatment system based on catalytic oxidation according to claim 2, characterized in that: The middle part of the rear end of the exhaust tank (111) is fixedly connected to a discharge valve (113), the middle part of the front end of the exhaust tank (111) is fixedly connected to a return valve (114), and the front end of the return valve (114) is connected to the power assembly (10).

4. The exhaust gas treatment system based on catalytic oxidation according to claim 3, characterized in that: The power assembly (10) comprises a fixed pipe (101), the front end of the fixed pipe (101) is connected to the rear end of the discharge tank (7), the rear end of the fixed pipe (101) is fixedly connected to a four-way valve (105), and the rear end of the four-way valve (105) is connected to a reflux valve (114).

5. The tail gas treatment system based on catalytic oxidation according to claim 4, characterized in that: The upper and lower ends of the four-way valve (105) are respectively connected to the two gas pipes (12); a first piston plate (102) is movably sleeved inside the fixed pipe (101); the first piston plate (102) is displaced forward and backward relative to the fixed pipe (101); and a front end of the first piston plate (102) is fixedly connected to a first piston rod (103) located inside the fixed pipe (101).

6. The tail gas treatment system based on catalytic oxidation according to claim 5, characterized in that: The front end of the first piston rod (103) passes through the front end of the fixed tube (101) and the rear end of the discharge tank (7) in sequence and is connected to the middle part of the rear end of the mounting plate (8); the outer side surface of the first piston rod (103) is movably sleeved with a limit spring (104); the upper and lower ends of the limit spring (104) are respectively connected to one end of the first piston plate (102) and one end of the fixed tube (101).

7. The exhaust gas treatment system based on catalytic oxidation according to claim 6, characterized in that: The bottom end of the catalyst tank (1) is provided with inspection openings (4) near the front and rear sides, and the bottom end of the inspection opening (4) is threadedly sleeved with an inspection cover (5).

8. The exhaust gas treatment system based on catalytic oxidation according to claim 7, characterized in that: The auxiliary dredging component (15) comprises a mounting frame (151), the mounting frame (151) is connected to the outer side surface of the heating tube (16), the inner side surface of the mounting frame (151) is fixedly sleeved with a regulating tube (152), the top end of the regulating tube (152) is connected to the gas supply pipe (12), the inside of the regulating tube (152) is movably sleeved with a second piston plate (153), and the bottom end of the second piston plate (153) is fixedly connected with a second piston rod (154) located inside the regulating tube (152).

9. The exhaust gas treatment system based on catalytic oxidation according to claim 8, characterized in that: The bottom end of the second piston rod (154) passes through the bottom end of the mounting frame (151) and is fixedly connected to an impact ball (155) located on the outer side of the heating tube (16); a return spring (157) is movably sleeved on the outer side of the second piston rod (154); the upper and lower ends of the return spring (157) are respectively connected to one end of the second piston plate (153) and one end of the regulating tube (152); an extension piece (156) is fixedly sleeved on the outer side of the second piston rod (154) near the bottom end.

10. The exhaust gas treatment system based on catalytic oxidation according to claim 9, characterized in that: The front end of the extension member (156) is fixedly connected to an extension frame (13), and the bottom end of the extension frame (13) is fixedly installed with a sealing cover plate (14). The two sealing cover plates (14) are located at the upper and lower sides of the front end of the air intake tank (3). When the reset spring (157) is in an initial state, the sealing cover plate (14) does not block the front end of the air intake tank (3). When the reset spring (157) is in an extreme compression state, the ends of the two sealing cover plates (14) that are close to each other are in contact and block the front of the air intake tank (3).

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