An explosion-proof catalytic oxidation device and process for volatile organic compounds

Abstract

The present invention relates to the technical field of waste gas treatment, and specifically to an explosion-proof catalytic oxidation device and process for volatile organic compounds, comprising: a treatment box, and a first delivery pipe and a second delivery pipe installed on one side of the treatment box, a discharge pipe is provided on the other side of the treatment box, and a resistance heater and a catalytic plate are provided in the treatment box; a pressure regulating tank, which is installed on the side wall of the treatment box and connected to the treatment box, and a conduction control mechanism is provided in the pressure regulating tank, and a follow-up rotating mechanism is provided on the conduction control mechanism, and the conduction control mechanism can be actuated when the pressure in the pressure regulating tank changes, and drive the follow-up rotating mechanism to move to adjust the conduction state of the first delivery pipe and the second delivery pipe; a pressure relief reflux mechanism is provided in the pressure regulating tank and connected to the follow-up rotating mechanism. The present application can automatically adjust the waste gas delivery volume according to the pressure in the pressure regulating tank, and perform pressure relief treatment on the treatment box.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, and in particular to an explosion-proof catalytic oxidation device and process for volatile organic compounds. Background Art

[0002] Volatile organic compounds refer to organic compounds that exist in the form of gas at room temperature. They are widely present in many fields such as industrial production, transportation and daily life emissions, posing a potential threat to the environment and human health.

[0003] The catalytic oxidation of volatile organic compounds is achieved by bringing volatile organic compounds into contact with oxygen at a certain temperature and using the action of a catalyst to convert organic pollutants into harmless water and carbon dioxide. The catalyst achieves efficient catalytic oxidation of volatile organic compounds by increasing the reaction rate and reducing the reaction activation energy.

[0004] The catalytic oxidation process is an exothermic reaction. As the temperature rises, the pressure in the reaction chamber will continue to increase. When existing catalytic oxidation equipment treats exhaust gas, as the pressure increases, the reaction rate will gradually accelerate. Since it is difficult for existing equipment to make corresponding judgments based on changes in pressure, such as automatically reducing the delivery of exhaust gas and oxygen, the two affect each other, which may lead to excessive pressure and explosion and other risks. Summary of the invention

[0005] The object of the present invention is to provide an explosion-proof catalytic oxidation device and process for volatile organic compounds to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An explosion-proof catalytic oxidation device for volatile organic compounds, comprising:

[0008] A processing box, and a first delivery pipe and a second delivery pipe installed on one side of the processing box, a discharge pipe is arranged on the other side of the processing box, and a resistance heater and a catalytic plate are arranged in the processing box;

[0009] Also includes:

[0010] A pressure regulating tank is installed on the side wall of the processing box and connected to the processing box. A conduction regulating mechanism is arranged in the pressure regulating tank. A follow-up rotating mechanism is arranged on the conduction regulating mechanism. The conduction regulating mechanism can be actuated when the pressure in the pressure regulating tank changes, and drives the follow-up rotating mechanism to move, so as to adjust the conduction state of the first delivery pipe and the second delivery pipe;

[0011] The pressure relief reflux mechanism is arranged in the pressure regulating tank and connected to the follower rotating mechanism. When the pressure in the pressure regulating tank exceeds a critical value, the follower rotating mechanism will drive the pressure relief reflux mechanism to move, so as to discharge the gas in the treatment box through the pressure regulating tank and dilute the exhaust gas in the first delivery pipe.

[0012] As a further solution of the present invention: the conduction and regulation mechanism includes a rotating rod rotatably installed in the pressure regulating tank and passing through the processing box, a rotating plate is provided at one end of the rotating rod facing the processing box, a first conduction hole and a second conduction hole are provided on the rotating plate, and a guide assembly connected to the rotating rod is provided in the pressure regulating tank.

[0013] As a further solution of the present invention: the guide assembly includes guide columns installed in the pressure regulating tank and symmetrically arranged, a sealing disk that is slidably installed on the guide column and is sealingly and slidably connected to the pressure regulating tank, and a guiding structure connected to the sealing disk is arranged on the rotating rod.

[0014] As a further solution of the present invention: the guiding structure includes a guiding groove provided on the rotating rod, a first movable sleeve is slidably mounted on the rotating rod, the first movable sleeve is connected to the sealing disk, and a first limiting block slidably connected to the guiding groove is provided on the inner wall of the first movable sleeve.

[0015] As a further solution of the present invention: the follow-up rotating mechanism includes a second spiral groove opened on the rotating rod, a second movable sleeve is slidably installed on the rotating rod, a second limit block slidably connected to the second spiral groove is arranged on the inner wall of the second movable sleeve, and an elastic component connected to the rotating rod is arranged on the second movable sleeve.

[0016] As a further solution of the present invention: the elastic component includes a connecting plate slidably mounted on the guide column and connected to the second movable sleeve, the guide column is provided with a second spring abutting against the connecting plate, the rotating rod is provided with a first spring, and the two ends of the first spring are respectively abutted against the sealing disk and the connecting plate.

[0017] As a further solution of the present invention: the pressure relief reflux mechanism includes a pressure relief pipe installed in the pressure regulating tank and slidably connected to the second movable sleeve, the outer wall of the second movable sleeve is provided with a third spiral groove and a third straight groove, the inner wall of the pressure relief pipe is provided with a third limit block slidably connected to the third spiral groove and the third straight groove, and the pressure relief pipe is provided with a discharge assembly connected to the rotating rod.

[0018] As a further solution of the present invention: the discharge assembly includes a through groove opened on the rotating rod and connected to the pressure relief pipe, a plurality of first discharge holes equidistantly distributed in a circle are opened at the bottom of the pressure relief pipe, a second discharge hole cooperating with the first discharge hole is opened at one end of the pressure regulating tank away from the processing box, and a guide structure connected to the first conveying pipe is provided on the pressure regulating tank.

[0019] As a further solution of the present invention: the flow guiding structure comprises a return pipe installed at the end of the pressure regulating tank and connected to the second discharge hole, and the return pipe is provided with a conduit connected to the first delivery pipe.

[0020] An explosion-proof catalytic oxidation process for volatile organic compounds comprises the following steps:

[0021] Step 1: The exhaust gas and oxygen are transported to the treatment box through the first delivery pipe and the second delivery pipe respectively, and the exhaust gas is catalytically oxidized through the catalytic plate under the action of the resistance heater;

[0022] Step 2: As the temperature in the processing box rises, the air pressure in the processing box will gradually increase, and under the action of the air pressure, the conduction regulating mechanism will be driven to move;

[0023] Step 3: The conduction regulating mechanism will also drive the follower rotating mechanism to move, so that when the pressure in the treatment box reaches a certain value, the conduction amount of the first delivery pipe and the second delivery pipe is adjusted by the conduction regulating mechanism to reduce the delivery amount of wastewater;

[0024] Step 4: When the pressure in the pressure regulating tank exceeds the critical value, the pressure relief reflux mechanism moves under the action of the follow-up rotating mechanism to discharge the exhaust gas in the treatment box to the original position through the pressure regulating tank. The pressure relief reflux mechanism can also transport the gas to the first delivery pipe to dilute the exhaust gas.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: the present application can automatically adjust the delivery volume of the exhaust gas according to the pressure in the pressure regulating tank, and when the pressure is too high, the treatment box is depressurized to prevent the exhaust gas from causing excessive pressure in the treatment box due to the heat release of the reaction during the catalytic oxidation process, which may lead to other safety problems such as explosion in the treatment box. When the exhaust gas and oxygen are respectively delivered to the treatment box through the first delivery pipe and the second delivery pipe, the exhaust gas is catalytically oxidized under the action of the resistance heater and the catalytic plate. As the reaction proceeds, the pressure in the treatment box will gradually increase. Under the action of the air pressure, The conduction regulating mechanism is moved. When the pressure reaches a certain value, under the action of the follow-up rotating mechanism, the conduction state of the first delivery pipe and the second delivery pipe is adjusted by the conduction regulating mechanism to reduce the delivery amount of the exhaust gas by the first delivery pipe. If the gas pressure is still in an elevated state and is greater than the critical value, under the action of the follow-up rotating mechanism, the pressure relief reflux mechanism is driven to move, so that the gas in the treatment box is discharged through the pressure relief reflux mechanism, and the gas is transported to the first delivery pipe to dilute the exhaust gas. The dual treatment of pressure relief and exhaust gas dilution can prevent the risk of explosion due to excessive pressure in the treatment box. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a structural schematic diagram of an embodiment of an explosion-proof catalytic oxidation device for volatile organic compounds.

[0027] Figure 2 The present invention is a structural schematic diagram from another angle of an embodiment of an explosion-proof catalytic oxidation device for volatile organic compounds.

[0028] Figure 3 The figure is a schematic diagram of a half-section structure of a processing box in one embodiment of an explosion-proof catalytic oxidation device for volatile organic compounds.

[0029] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at point A in the middle.

[0030] Figure 5 The present invention is a schematic structural diagram of a partial conduction control mechanism, a pressure regulating tank, a first delivery pipe, and a second delivery pipe in an embodiment of an explosion-proof catalytic oxidation device for volatile organic compounds.

[0031] Figure 6 The present invention is a schematic diagram of the connection relationship between a conduction control mechanism, a follow-up rotation mechanism, and a pressure relief reflux mechanism in one embodiment of an explosion-proof catalytic oxidation device for volatile organic compounds.

[0032] Figure 7 The present invention is a structural schematic diagram from another angle of an embodiment of an explosion-proof catalytic oxidation device for volatile organic compounds.

[0033] Figure 8The diagram is a partially half-sectioned structural diagram of an explosion-proof catalytic oxidation device for volatile organic compounds in one embodiment.

[0034] Fig. 9 The present invention is a schematic diagram of the explosion structure of a partial conduction control mechanism and a partial follow-up rotation mechanism in an embodiment of an explosion-proof catalytic oxidation device for volatile organic compounds.

[0035] Fig.10 for Fig. 9 A magnified schematic diagram of the structure at point B in the middle.

[0036] Fig.11 The present invention is a schematic diagram of the explosion structure of a partial follow-up rotating mechanism and a partial pressure relief reflux mechanism in an embodiment of an explosion-proof catalytic oxidation device for volatile organic compounds.

[0037] In the figure: 1, processing box; 2, first delivery pipe; 3, second delivery pipe; 4, discharge pipe; 5, resistance heater; 6, catalytic plate; 7, pressure regulating tank; 8, rotating rod; 801, first straight groove; 802, first annular groove; 803, first spiral groove; 804, second straight groove; 805, second annular groove; 9, rotating plate; 901, first conducting hole; 902, second conducting hole; 10, guide column; 11, first movable sleeve; 12, first limit block; 13, sealing disk; 14, first spring; 15, second spiral groove; 16, second movable sleeve; 1601, third spiral groove; 1602, third straight groove; 17, second limit block; 18, connecting plate; 19, second spring; 20, through groove; 21, pressure relief pipe; 22, third limit block; 23, first discharge hole; 24, second discharge hole; 25, reflux pipe; 26, conduit. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0040] See also Figure 1 to Figure 11In an embodiment of the present invention, an explosion-proof catalytic oxidation device for volatile organic compounds includes: a treatment box 1, a first delivery pipe 2, a second delivery pipe 3, a discharge pipe 4, a resistance heater 5, a catalytic plate 6, a pressure regulating tank 7, a conduction control mechanism, a follow-up rotation mechanism, and a pressure relief reflux mechanism. In order to prevent the waste gas from causing excessive pressure in the treatment box 1 due to heat release during the catalytic oxidation process, which may lead to explosions and other safety problems in the treatment box 1, it is necessary to automatically adjust the delivery volume of the waste gas according to the pressure in the pressure regulating tank 7, and perform pressure relief treatment on the treatment box 1 when the pressure is too high.

[0041] Therefore, when the exhaust gas and oxygen are respectively transported to the treatment box 1 through the first delivery pipe 2 and the second delivery pipe 3, the exhaust gas is catalytically oxidized under the action of the resistance heater 5 and the catalytic plate 6. As the reaction proceeds, the pressure in the treatment box 1 will gradually increase. Under the action of the air pressure, the conduction control mechanism moves. When the pressure reaches a certain value, under the action of the follow-up rotating mechanism, the conduction state of the first delivery pipe 2 and the second delivery pipe 3 is adjusted by the conduction control mechanism to reduce the exhaust gas conveying amount of the first delivery pipe 2. If the air pressure is still in an elevated state and is greater than the critical value, under the action of the follow-up rotating mechanism, the pressure relief reflux mechanism is driven to move, so that the gas in the treatment box 1 is discharged through the pressure relief reflux mechanism, and the gas is transported to the first delivery pipe 2 to dilute the exhaust gas. The dual treatment of pressure relief and exhaust gas dilution can prevent the risk of explosion caused by excessive pressure in the treatment box 1.

[0042] The details are as follows, including:

[0043] A processing box 1, and a first delivery pipe 2 and a second delivery pipe 3 installed on one side of the processing box 1, a discharge pipe 4 is arranged on the other side of the processing box 1, and a resistance heater 5 and a catalytic plate 6 are arranged in the processing box 1;

[0044] Among them, the volatile organic compound is an exothermic reaction during the catalytic oxidation process. As the reaction proceeds, the pressure in the treatment box 1 will gradually increase, and the increase in air pressure will also accelerate the reaction. The first delivery pipe 2 is used to transport the exhaust gas, the second delivery pipe 3 is used to transport the oxygen required for exhaust gas treatment, and the exhaust pipe 4 is used to discharge the gas treated by the treatment box 1. The resistance heater 5 can work when the exhaust gas and oxygen enter the treatment box 1 and provide the heat energy required for catalytic oxidation of the exhaust gas. The catalytic plate 6 is used to provide a catalytic effect on the exhaust gas. When the exhaust gas and oxygen are transported to the treatment box 1 and pass through the catalytic plate 6, the exhaust gas is heated under the action of the resistance heater 5 to ensure that the exhaust gas obtains a catalytic oxidation effect.

[0045] Also includes:

[0046] See also Figure 1-Figure 3 , Figure 5-Figure 10, a pressure regulating tank 7 is installed on the side wall of the processing box 1 and is connected to the processing box 1, a conduction regulating mechanism is arranged in the pressure regulating tank 7, and the conduction regulating mechanism includes a rotating rod 8 rotatably installed in the pressure regulating tank 7 and passing through the processing box 1, and a rotating plate 9 is arranged at one end of the rotating rod 8 facing the processing box 1, and a first conduction hole 901 and a second conduction hole 902 are opened on the rotating plate 9, and a guide assembly connected with the rotating rod 8 is arranged in the pressure regulating tank 7, wherein the guide assembly includes a guide column 10 installed in the pressure regulating tank 7 and symmetrically arranged, and a sealing disk 13 sealed and slidably connected with the pressure regulating tank 7 is slidably installed on the guide column 10, and a guiding structure connected with the sealing disk 13 is arranged on the rotating rod 8, and the above-mentioned guiding structure includes a guide groove opened on the rotating rod 8, and a first movable sleeve 11 is slidably installed on the rotating rod 8, and the first movable sleeve 11 is connected with the sealing disk 13, and the inner wall of the first movable sleeve 11 is provided with a first limit block 12 slidably connected with the guide groove.

[0047] In detail, the rotating rod 8 is hollow and connected to the processing box 1. The guide groove can be divided into multiple sections, namely the first straight groove 801, the first annular groove 802, the first spiral groove 803, the second straight groove 804, and the second annular groove 805. The two ends of the first annular groove 802 are respectively connected to one end of the first straight groove 801 and the second straight groove 804, the two ends of the second annular groove 805 are respectively connected to the other end of the second straight groove 804 and the first straight groove 801, and one end of the first spiral groove 803 is connected to the connecting position of the first annular groove 802 and the second straight groove 804.

[0048] In the initial state, the pressure in the treatment box 1 and the pressure regulating tank 7 is relatively small. Under the action of the follow-up rotating mechanism, the sealing disk 13 is located at the end of the stroke toward the side of the treatment box 1, so that the first limit block 12 is located at the end of the stroke on the side of the first straight groove 801 away from the first annular groove 802. At this time, the rotating rod 8 is in a blocked state. When the exhaust gas in the treatment box 1 is catalytically oxidized, the air pressure in the treatment box 1 will increase, thereby acting on the sealing disk 13 to push the sealing disk 13 to move in the direction away from the treatment box 1. The sealing disk 13 will drive the first limit block 12 to move along the length direction of the first straight groove 801 through the first movable sleeve 11. In this process, when the pressure increases and is less than a certain range, it is conducive to the rapid progress of the reaction.

[0049] If the pressure exceeds the safe range value, it is necessary to reduce the rate of exhaust gas reaction to prevent the risk of explosion due to excessive pressure in the treatment box 1. At this time, the first limit block 12 just moves to the connection position of the first straight groove 801 and the first annular groove 802, and under the action of the follow-up rotating mechanism, the rotating rod 8 rotates a certain angle so that the first limit block 12 is located at the connection position of the first annular groove 802 and the second straight groove 804. When the rotating rod 8 rotates, it will also drive the rotating plate 9 to move, so that the first conducting hole 901 and the second conducting hole 902 move. Under the action of the first conducting hole 901, the conduction area of ​​the first conveying pipe 2 is reduced, thereby reducing the delivery amount of exhaust gas, so as to reduce the exhaust gas treatment rate, thereby achieving the purpose of reducing the air pressure in the treatment box 1.

[0050] Preferably, if the air pressure in the treatment box 1 is still in an elevated state, the sealing disk 13 will continue to move, and drive the first limit block 12 to enter the first spiral groove 803 through the first movable sleeve 11, so that the rotating rod 8 continues to move, and the rotating rod 8 will control the movement of the pressure relief reflux mechanism through the follow-up rotating mechanism, so that the gas in the treatment box 1 is transported to the pressure relief reflux mechanism through the rotating rod 8, and is transported back to the exhaust gas tank through the pressure relief reflux mechanism. At the same time, part of the diluted exhaust gas containing air can also be transported to the first delivery pipe 2 to dilute the exhaust gas transported by the first delivery pipe 2. By discharging the exhaust gas in the treatment box 1 and diluting the exhaust gas transported to the treatment box 1, the air pressure in the treatment box 1 can be relieved in time to prevent the occurrence of other risk problems such as explosion due to excessive pressure.

[0051] See also Figure 3 , Figure 6-Figure 9 , Fig.11 , a follow-up rotating mechanism is provided on the conduction regulating mechanism, and the conduction regulating mechanism can be activated when the pressure in the pressure regulating tank 7 changes, and drive the follow-up rotating mechanism to move to adjust the conduction state of the first conveying pipe 2 and the second conveying pipe 3, the follow-up rotating mechanism includes a second spiral groove 15 opened on the rotating rod 8, a second movable sleeve 16 is slidably mounted on the rotating rod 8, a second limit block 17 slidably connected to the second spiral groove 15 is provided on the inner wall of the second movable sleeve 16, and an elastic component connected to the rotating rod 8 is provided on the second movable sleeve 16, wherein the elastic component includes a connecting plate 18 slidably mounted on the guide column 10 and connected to the second movable sleeve 16, a second spring 19 abutting against the connecting plate 18 is sleeved on the guide column 10, and a first spring 14 is sleeved on the rotating rod 8, and the two ends of the first spring 14 abut against the sealing disk 13 and the connecting plate 18 respectively.

[0052] It should be noted that, in the initial state, the first spring 14 and the second spring 19 are both in a compressed state, and the elastic potential energy of the second spring 19 is greater than the elastic potential energy of the first spring 14, so that the sealing disk 13 and the connecting plate 18 are both located at the end of the stroke toward the treatment box 1, so that the first limit block 12 is located at the end of the stroke on the side of the first straight groove 801, and the second limit block 17 is located at the end of the stroke on the side of the second spiral groove 15. When the exhaust gas is catalytically oxidized in the treatment box 1, as the reaction proceeds, the gas pressure in the treatment box 1 will gradually increase, thereby pushing The dynamic sealing disk 13 moves in a direction away from the processing box 1, and the sealing disk 13 will drive the first limit block 12 to move along the length direction of the first straight groove 801 through the first movable sleeve 11, and compress the first spring 14. When the first limit block 12 does not cross the second annular groove 805, the elastic potential energy of the first spring 14 is smaller than the elastic potential energy of the second spring 19. When the first limit block 12 crosses the second annular groove 805 and continues to slide a certain distance, the elastic potential energy of the first spring 14 will gradually become greater than the elastic potential energy of the second spring 19. The first stop block 12 and the first straight groove 801 have a guiding function to ensure that the rotating rod 8 does not rotate. When the first stop block 12 moves to the connection position between the first annular groove 802 and the first straight groove 801, the elastic potential energy of the first spring 14 is much greater than the elastic potential energy of the second spring 19. At this time, the first spring 14 is elastically released and drives the connecting plate 18 to move in a direction away from the processing box 1 to compress the second spring 19. At the same time, the connecting plate 18 also controls the second stop block 17 to slide along the second spiral groove 15 through the second movable sleeve 16. , so that the rotating rod 8 rotates, the rotating rod 8 will also control the first limit block 12 to move to the connection position between the first annular groove 802 and the second straight groove 804, and reduce the conduction amount of the first conveying pipe 2 through the first conducting hole 901. If the pressure in the processing box 1 is still in an increasing state, the sealing disk 13 continues to move, so that the first limit block 12 enters the first spiral groove 803. At the same time, the second limit block 17 will continue to slide along the second spiral groove 15, thereby controlling the movement of the pressure relief reflux mechanism through the second movable sleeve 16 to perform pressure relief treatment on the processing box 1.

[0053] Preferably, when the pressure in the processing box 1 decreases, the first spring 14 and the second spring 19 are elastically released, so that the first limit block 12 returns to the connection position between the second straight groove 804 and the first annular groove 802. Since the elastic potential energy of the first spring 14 is greater than the elastic potential energy of the second spring 19, the first limit block 12 will enter the second straight groove 804. The first limit block 12 and the second straight groove 804 also have a guiding function to ensure that the rotating rod 8 does not rotate. During the movement of the first limit block 12, the elastic potential energy of the first spring 14 gradually decreases. Until it is less than the elastic potential energy of the second spring 19. At this time, the first limit block 12 is still in the second straight groove 804. When the first limit block 12 moves to the connection position of the second straight groove 804 and the second annular groove 805, the second spring 19 is elastically released and drives the connecting plate 18 to move toward the initial position, so that the second limit block 17 slides along the second spiral groove 15, so that the rotating rod 8 rotates. At this time, the first limit block 12 returns to the first straight groove 801 again, and the second spring 19 and the first spring 14 continue to be elastically released and drive the first limit block 12 to reset.

[0054] See also Figure 1-Figure 8 , Fig.11 , a pressure relief reflux mechanism is arranged in the pressure regulating tank 7 and connected to the follower rotating mechanism. When the pressure in the pressure regulating tank 7 exceeds a critical value, the follower rotating mechanism will drive the pressure relief reflux mechanism to move, so as to discharge the gas in the processing box 1 through the pressure regulating tank 7, and dilute the exhaust gas in the first delivery pipe 2. The pressure relief reflux mechanism includes a pressure relief pipe 21 installed in the pressure regulating tank 7 and slidably connected to the second movable sleeve 16. The outer wall of the second movable sleeve 16 is provided with a third spiral groove 1601 and a third straight groove 1602. The inner wall of the pressure relief pipe 21 is provided with a third limiter slidably connected to the third spiral groove 1601 and the third straight groove 1602. Block 22, a discharge assembly connected to the rotating rod 8 is arranged in the pressure relief pipe 21, wherein the discharge assembly includes a through groove 20 opened on the rotating rod 8 and connected to the pressure relief pipe 21, a plurality of first discharge holes 23 equidistantly distributed in a circle are opened at the bottom of the pressure relief pipe 21, a second discharge hole 24 cooperating with the first discharge hole 23 is opened at the end of the pressure regulating tank 7 away from the processing box 1, a guide structure connected to the first conveying pipe 2 is arranged on the pressure regulating tank 7, the guide structure mentioned above includes a return pipe 25 installed at the end of the pressure regulating tank 7 and connected to the second discharge hole 24, and a conduit 26 connected to the first conveying pipe 2 is arranged on the return pipe 25.

[0055] Further, in the initial state, under the action of the first spring 14 and the second spring 19, the sealing disk 13 and the connecting plate 18 are located at the end of the stroke toward the side of the processing box 1, thereby controlling the second movable sleeve 16 to be located at the end of the stroke in the direction away from the pressure relief pipe 21. At this time, the third limit block 22 is located at the end of the stroke on the side of the third straight groove 1602 away from the third spiral groove 1601, and the first discharge hole 23 and the second discharge hole 24 are in a misaligned state, so that the pressure relief pipe 21 is in a blocked state. When the pressure in the processing box 1 increases, the sealing disk 13 is controlled to move, and when the first limit block 12 moves to the connection position of the first straight groove 801 and the first annular groove 802, under the action of the first spring 14, the connecting plate 18 moves toward the direction of the pressure relief pipe 21, and the connecting plate 18 also drives the second movable sleeve 16 to move, so that the third limit block 22 moves to the first limit block 22. The connection position of the three straight grooves 1602 and the third spiral groove 1601, if the pressure in the treatment box 1 is still in an elevated state at this time, the connecting plate 18 will continue to move, so that the third limit block 22 slides in the third spiral groove 1601, so that the pressure relief pipe 21 rotates a certain angle, and the pressure relief pipe 21 will drive the first discharge hole 23 to move to the connection position with the second discharge hole 24. At this time, the gas in the treatment box 1 will enter the pressure relief pipe 21 through the rotating rod 8 and the through groove 20, and be transported to the return pipe 25 through the first discharge hole 23 and the second discharge hole 24. The return pipe 25 is connected to the tank body for transporting exhaust gas. When the return pipe 25 transports gas, a part of the diluted exhaust gas containing air can also be transported to the first delivery pipe 2 through the conduit 26 to dilute the transported exhaust gas, thereby further preventing the risk of explosion caused by excessive pressure in the treatment box 1.

[0056] An explosion-proof catalytic oxidation process for volatile organic compounds comprises the following steps:

[0057] Step 1: The exhaust gas and oxygen are transported to the treatment box 1 through the first delivery pipe 2 and the second delivery pipe 3 respectively, and the exhaust gas is catalytically oxidized by the catalytic plate 6 under the action of the resistance heater 5;

[0058] Step 2: As the temperature in the processing box 1 increases, the air pressure in the processing box 1 will gradually increase, and under the action of the air pressure, the conduction regulating mechanism will be driven to move;

[0059] Step 3: The conduction regulating mechanism will also drive the follower rotating mechanism to move, so that when the pressure in the treatment box 1 reaches a certain value, the conduction regulating mechanism will adjust the conduction amount of the first delivery pipe 2 and the second delivery pipe 3 to reduce the delivery amount of wastewater;

[0060] Step 4: When the pressure in the pressure regulating tank 7 exceeds the critical value, the pressure relief reflux mechanism moves under the action of the follower rotating mechanism to discharge the exhaust gas in the treatment box 1 to the original position through the pressure regulating tank 7. The pressure relief reflux mechanism can also transport the gas to the first delivery pipe 2 to dilute the exhaust gas.

[0061] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0062] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An explosion-proof catalytic oxidation device for volatile organic compounds, comprising: A processing box (1), and a first delivery pipe (2) and a second delivery pipe (3) installed on one side of the processing box (1); a discharge pipe (4) is arranged on the other side of the processing box (1); and a resistance heater (5) and a catalytic plate (6) are arranged inside the processing box (1); It is characterized by further comprising: A pressure regulating tank (7) is mounted on a side wall of the processing box (1) and is connected to the processing box (1). A conduction regulating mechanism is provided in the pressure regulating tank (7). A follower rotating mechanism is provided on the conduction regulating mechanism. The conduction regulating mechanism is capable of actuating when the pressure in the pressure regulating tank (7) changes, and drives the follower rotating mechanism to move, so as to adjust the conduction state of the first delivery pipe (2) and the second delivery pipe (3); a pressure relief reflux mechanism, which is arranged in the pressure regulating tank (7) and connected to the follower rotating mechanism; when the pressure in the pressure regulating tank (7) exceeds a critical value, the follower rotating mechanism will drive the pressure relief reflux mechanism to move, so as to discharge the gas in the processing box (1) through the pressure regulating tank (7), and dilute the waste gas in the first delivery pipe (2); The conduction and regulation mechanism comprises a rotating rod (8) rotatably mounted in the pressure regulating tank (7) and penetrating the processing box (1); a rotating plate (9) is provided at one end of the rotating rod (8) facing the processing box (1); a first conduction hole (901) and a second conduction hole (902) are provided on the rotating plate (9); and a guide assembly connected to the rotating rod (8) is provided in the pressure regulating tank (7).

2. The explosion-proof catalytic oxidation device for volatile organic compounds according to claim 1, characterized in that: The guide assembly comprises guide columns (10) which are installed in the pressure regulating tank (7) and are symmetrically arranged, a sealing disk (13) which is slidably mounted on the guide columns (10) and is sealingly and slidably connected to the pressure regulating tank (7), and a guide structure which is connected to the sealing disk (13) is arranged on the rotating rod (8).

3. The explosion-proof catalytic oxidation device for volatile organic compounds according to claim 2, characterized in that: The guide structure comprises a guide groove formed on the rotating rod (8); a first movable sleeve (11) is slidably mounted on the rotating rod (8); the first movable sleeve (11) is connected to the sealing disk (13); and a first limit block (12) slidably connected to the guide groove is provided on an inner wall of the first movable sleeve (11).

4. The explosion-proof catalytic oxidation device for volatile organic compounds according to claim 2, characterized in that: The follow-up rotating mechanism comprises a second spiral groove (15) formed on the rotating rod (8); a second movable sleeve (16) is slidably mounted on the rotating rod (8); a second limit block (17) slidably connected to the second spiral groove (15) is disposed on the inner wall of the second movable sleeve (16); and an elastic component connected to the rotating rod (8) is disposed on the second movable sleeve (16).

5. The explosion-proof catalytic oxidation device for volatile organic compounds according to claim 4, characterized in that: The elastic component comprises a connecting plate (18) slidably mounted on the guide column (10) and connected to the second movable sleeve (16); a second spring (19) is sleeved on the guide column (10) and abuts against the connecting plate (18); a first spring (14) is sleeved on the rotating rod (8); two ends of the first spring (14) abut against the sealing disk (13) and the connecting plate (18), respectively.

6. The explosion-proof catalytic oxidation device for volatile organic compounds according to claim 4, characterized in that: The pressure relief reflux mechanism comprises a pressure relief pipe (21) installed in the pressure regulating tank (7) and slidably connected to the second movable sleeve (16); a third spiral groove (1601) and a third straight groove (1602) are provided on the outer wall of the second movable sleeve (16); a third limit block (22) slidably connected to the third spiral groove (1601) and the third straight groove (1602) is provided on the inner wall of the pressure relief pipe (21); and a discharge assembly connected to the rotating rod (8) is provided in the pressure relief pipe (21).

7. The explosion-proof catalytic oxidation device for volatile organic compounds according to claim 6, characterized in that: The discharge assembly comprises a through groove (20) formed on the rotating rod (8) and connected to the pressure relief pipe (21); a plurality of first discharge holes (23) equidistantly distributed in a circumference are formed at the bottom of the pressure relief pipe (21); a second discharge hole (24) cooperating with the first discharge hole (23) is formed at one end of the pressure regulating tank (7) away from the processing box (1); and a flow guide structure connected to the first delivery pipe (2) is provided on the pressure regulating tank (7).

8. The explosion-proof catalytic oxidation device for volatile organic compounds according to claim 7, characterized in that: The flow guiding structure comprises a return pipe (25) installed at the end of the pressure regulating tank (7) and connected to the second discharge hole (24); the return pipe (25) is provided with a conduit (26) connected to the first delivery pipe (2).

9. An explosion-proof catalytic oxidation process for volatile organic compounds, using the explosion-proof catalytic oxidation device for volatile organic compounds according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: The exhaust gas and oxygen are transported to the treatment box (1) through the first transport pipe (2) and the second transport pipe (3) respectively, and the exhaust gas is subjected to catalytic oxidation treatment through the catalytic plate (6) under the action of the resistance heater (5); Step 2: As the temperature in the processing box (1) increases, the air pressure in the processing box (1) will gradually increase, and under the action of the air pressure, the conduction regulating mechanism will be driven to move; Step 3: The conduction regulating mechanism also drives the follower rotating mechanism to move, so that when the pressure in the treatment box (1) reaches a certain value, the conduction regulating mechanism adjusts the conduction amount of the first delivery pipe (2) and the second delivery pipe (3) to reduce the delivery amount of the exhaust gas; Step 4: When the pressure in the pressure regulating tank (7) exceeds the critical value, the pressure relief reflux mechanism moves under the action of the follower rotating mechanism to discharge the waste gas in the treatment box (1) to the original position through the pressure regulating tank (7). The pressure relief reflux mechanism can also transport the gas to the first transport pipe (2) to dilute the waste gas.

Images