A waste gas treatment device for petrochemical industry

Abstract

The present invention belongs to the technical field of waste gas treatment, and discloses a waste gas treatment device for petrochemical industry, including a treatment box 1 and a treatment box 2 installed on the left side of the treatment box 1, a partition is fixedly installed on the inner wall of the treatment box 1, and the inner cavity of the treatment box 1 is divided into an upper treatment cavity and a lower treatment cavity by the partition, a plurality of sets of fixed plates are installed on the top of the inner wall of the treatment box 1, a cover plate and an air inlet pipe are installed on the top of the fixed plate by bolt pressing, and a fan 1 is fixedly installed on the right side of the treatment box 1. The device drives the chemical treatment liquid to rotate counterclockwise around the axis of the liquid storage cylinder to form a vortex, and the liquid level in the middle of the liquid storage cylinder is lowered, so that the movable plate and the sealing plate move downward and break away from the contact with the sealing ring, so that the waste gas entering the inner cavity of the transfer cylinder fully reacts with the chemical treatment liquid along the outlet pipe 2 and the reaction hole, greatly improving the waste gas treatment efficiency of the device.

Description

Technical Field

[0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a waste gas treatment device for petrochemical industry. Background Art

[0002] The petrochemical industry is an industry that separates and purifies petroleum into energy-type liquids such as gasoline and kerosene. Waste gas is generated in the petrochemical industry. These phases contain a large amount of harmful gases, which must be treated before being discharged into the environment. In the prior art, the treatment methods of waste gas treatment devices for petrochemicals are generally filtration, chemical reaction separation and high-temperature treatment. Among them, the most common chemical reaction separation is to use alkaline solution to neutralize the acidic gas in the waste gas to produce salt and water. In the prior art, spraying chemical liquid is usually used to react with the waste gas, but the treatment efficiency of this method is relatively low. The movement trajectory of the waste gas entering the reaction chamber along the pipeline is chaotic, especially after losing the negative pressure of the pipeline and the fan, the contact area between the waste gas and the sprayed chemical liquid in the space is very small. Many waste gases will experience a long and aimless floating before contacting with the chemical liquid and reacting and consuming. Moreover, since the direction of the waste gas entering the reaction chamber is fixed, its flow rate is also very large, resulting in a very short contact time for the remaining chemical liquid when it is sprayed out, further limiting the efficiency of the reaction consumption. Summary of the invention

[0003] The object of the present invention is to provide a waste gas treatment device for petrochemical industry to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a waste gas treatment device for petrochemical industry, comprising a treatment box 1 and a treatment box 2 installed on the left side of the treatment box 1, a partition is fixedly installed on the inner wall of the treatment box 1, and the inner cavity of the treatment box 1 is divided into an upper treatment cavity and a lower treatment cavity by the partition, a plurality of sets of fixing plates are installed on the top of the inner wall of the treatment box 1, a cover plate and an air inlet pipe are installed on the top of the fixing plate by bolt pressing, a fan 1 is fixedly installed on the right side of the treatment box 1, one end of the fan 1 is fixedly connected to a connecting pipe 1, the connecting pipe 1 extends to the lower treatment cavity, and is connected with the upper treatment cavity through the fan 1, and a liquid storage cylinder is fixedly installed on the bottom of the inner wall of the lower treatment cavity, A liquid replenishing tube is fixedly connected to the right side of the liquid storage cylinder, a liquid drain tube is installed at the bottom of the liquid storage cylinder, the bottom end of the connecting tube one is fixedly connected to a transfer cylinder, the bottom of the transfer cylinder is fixedly connected to multiple groups of air outlet pipes two, a reaction hole is opened on the outer surface of the air outlet pipe two, a sealing ring is fixedly installed on the top of the inner cavity of the transfer cylinder, multiple groups of pillars are fixedly connected to the inner wall of the transfer cylinder, a movable plate is movably clamped on the outer surface of the pillar, a sealing plate is fixedly connected to the top of the movable plate, the top of the sealing plate is abutted against the sealing ring, the inner cavity of the liquid storage cylinder is filled with chemical treatment liquid, the liquid level of the chemical treatment liquid is higher than the sealing plate, and multiple groups of air outlet pipes one are fixedly connected to the outer surface of the connecting tube one.

[0005] As a preferred solution of the present invention, a fixing ring is fixedly connected to the bottom of the cover plate, a permanent magnet ring is fixedly connected to the bottom of the inner wall of the fixing ring, a sealing strip is glued to one side of the inner wall of the fixing ring, a metal mounting ring is magnetically connected to the inside of the fixing ring through the permanent magnet ring, the inner ring surface of the metal mounting ring is in contact with the sealing strip, and a filter screen is fixedly installed on the bottom of the metal mounting ring.

[0006] As a preferred solution of the present invention, a drainage hood located above the exhaust pipe 1 is fixedly installed on the outer surface of the connecting pipe 1, and a connecting pipe 2 is fixedly connected to the top of the drainage hood. One end of the connecting pipe 2 passes through to the left to the outside of the treatment box 1 and is fixedly connected to a fan 2. The exhaust end of the fan 2 is connected to the treatment box 2. A heater is installed on the upper side of the inner wall of the inner cavity of the treatment box 2, a catalytic bed is fixedly installed in the middle of the inner wall of the treatment box 2, and an exhaust pipe is fixedly connected to the bottom of the left side of the treatment box 2.

[0007] As a preferred solution of the present invention, the drainage cover is in the shape of a pot cover and covers the outer edge of the top of the liquid storage cylinder, and a gap is left between the drainage cover and the liquid storage cylinder.

[0008] As a preferred solution of the present invention, the air outlet pipes are arranged in four groups and are distributed at equal angles at the bottom of the vertical part of the outer surface of the connecting pipe. The air outlet end of the air outlet pipe is inclined, and a blocking cylinder is fixedly installed on the inclined end of the outer surface of the air outlet pipe. A symmetrical pointed cone structure is arranged at the bottom of the blocking cylinder.

[0009] As a preferred solution of the present invention, the area value of the movable plate is greater than the area value of the sealing plate, the sealing plate is made of a rubber block, and the outer ring area value of the sealing ring is smaller than the area value of the sealing plate.

[0010] As a preferred solution of the present invention, the outer surface of the movable plate is provided with a plurality of groups of "U"-shaped grooves, the "U"-shaped grooves are adapted to be snap-fitted with the pillars, and the area of ​​the movable plate is smaller than the area of ​​the inner cavity of the rotating cylinder.

[0011] As a preferred solution of the present invention, the sealing strip is made of a rubber block, the axial cross-section of the metal mounting ring is in an "L" shape, and the sealing strip is completely wrapped around the inner wall of the fixing ring.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. This device improves the treatment efficiency of waste gas by ventilating the liquid surface of the chemical treatment liquid. A partition is arranged and fixed on the inner wall of the treatment box 1 to divide the inner cavity of the treatment box 1 into two treatment chambers, an upper chamber and a lower chamber. After the waste gas is initially filtered in the upper treatment chamber, it enters the connecting pipe 1 and the lower treatment chamber under the action of the fan 1. The rotating cylinder arranged below the liquid surface of the chemical treatment liquid makes the moving plate and the sealing plate contact with the sealing ring under the action of the liquid pressure to form a seal, and the air pressure of the waste gas entering the connecting pipe 1 is completely concentrated on the four groups of outlet ports. In tube one, the outlet end is tilted to design the outlet pipe one, so that the exhaust gas can act on the chemical treatment liquid in the liquid storage cylinder after being ejected from the outlet pipe one. While being consumed in the neutralization reaction, the chemical treatment liquid is driven to rotate counterclockwise around the axis of the liquid storage cylinder to form a vortex, and the liquid level in the middle of the liquid storage cylinder is lowered, so that the movable plate and the sealing plate move downward and break away from the abutment with the sealing ring, so that the exhaust gas entering the inner cavity of the transfer cylinder can fully react with the chemical treatment liquid along the outlet pipe two and the reaction hole, thereby greatly improving the exhaust gas treatment efficiency of the device.

[0014] 2. This device utilizes the kinetic energy of the exhaust gas ejected from the outlet pipe 1 to be converted into the kinetic energy of the vortex of the chemical treatment liquid stored in the liquid storage cylinder, so that the pressure in the central area of ​​the liquid surface is lower than the pressure in the outer periphery, thereby causing the chemical liquid to generate a centripetal pulling force from the periphery to the center of the vortex. This centripetal pulling force specifically acts on the outlet end of each group of outlet pipes 1. Even if the height of the outer periphery of the liquid surface increases due to the vortex, thereby increasing the liquid pressure, the centripetal pulling force generated by the vortex can reduce the outlet resistance at one end of the outlet pipe 1 caused by the increase in liquid pressure with height, thereby allowing the chemical treatment liquid to always maintain an efficient vortex state.

[0015] 3. The device has also redesigned the air intake filter part mainly composed of the cover plate, air intake pipe and filter screen, so that the entire filter screen is easy to disassemble and maintain. The cover plate is pressed and installed on the top of the treatment box through the fixing plate and bolts to form an overall detachable design. At the same time, the gravity of the cover plate, air intake pipe, fixing ring, metal mounting ring, filter screen, permanent magnetic ring and sealing strip is used to automatically reinforce the cover plate to prevent it from loosening. Internally, the permanent magnetic ring on the top of the inner wall of the fixing ring is magnetically connected to the metal mounting ring, and an annular abutting sealing layer is formed by the sealing strip to prevent exhaust gas from leaking to the outside of the filter screen. The magnetic design of the metal mounting ring and the permanent magnetic ring enables the filter screen to be easily removed, and the flexible material design of the sealing strip is used to reinforce the fixation of the metal mounting ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal three-dimensional structure of the overall structure of the present invention;

[0017] Figure 2 It is a front three-dimensional structural schematic diagram of the overall structure of the present invention;

[0018] Figure 3 It is a front cutaway structural schematic diagram of the overall structure of the present invention;

[0019] Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement in the middle;

[0020] Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0021] Figure 6 It is a schematic diagram of the separation structure of the fixing plate, the cover plate, the air inlet pipe, the fixing ring, the metal mounting ring, the filter screen, the permanent magnet ring and the sealing strip of the present invention;

[0022] Figure 7 It is a schematic diagram of the internal structure of the liquid storage cylinder of the present invention;

[0023] Figure 8 It is a schematic diagram of the internal cross-section structure of the rotary drum in the present invention;

[0024] Fig. 9 It is a schematic diagram of the separation of the rotating cylinder, the second air outlet pipe, the sealing ring, the support, the moving plate and the sealing plate in the present invention.

[0025] In the figure: 1. Processing box 1; 2. Partition; 3. Fixed plate; 4. Cover plate; 5. Inlet pipe; 6. Fixed ring; 7. Metal mounting ring; 8. Filter; 9. Exhaust pipe; 10. Permanent magnet ring; 11. Sealing strip; 12. Fan 1; 13. Connecting pipe 1; 14. Drainage cover; 15. Liquid replenishing pipe; 16. Exhaust pipe 1; 17. Anti-blocking cylinder; 18. Liquid storage cylinder; 19. Transfer cylinder; 20. Exhaust pipe 2; 21. Reaction hole; 22. Sealing ring; 23. Pillar; 24. Moving plate; 25. Sealing plate; 26. Connecting pipe 2; 27. Fan 2; 28. Processing box 2; 29. ​​Heater; 30. Catalytic bed; 31. Drain pipe. DETAILED DESCRIPTION

[0026] 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.

[0027] like Figures 1 to 9As shown, an embodiment of the present invention provides a waste gas treatment device for petrochemical industry, including a treatment box 1 and a treatment box 2 28 installed on the left side of the treatment box 1, a partition 2 is fixedly installed on the inner wall of the treatment box 1, and the inner cavity of the treatment box 1 is divided into an upper treatment cavity and a lower treatment cavity by the partition 2, a plurality of sets of fixing plates 3 are installed on the top of the inner wall of the treatment box 1, a cover plate 4 and an air inlet pipe 5 are installed on the top of the fixing plate 3 by bolt pressing, a fan 12 is fixedly installed on the right side of the treatment box 1, one end of the fan 12 is fixedly connected to a connecting pipe 13, the connecting pipe 13 extends to the lower treatment cavity, and is connected to the upper treatment cavity through the fan 12, a liquid storage cylinder 18 is fixedly installed on the bottom of the inner wall of the lower treatment cavity, and the right side of the liquid storage cylinder 18 is fixedly connected There is a liquid replenishing tube 15, a liquid draining tube 31 is installed at the bottom of the liquid storage tube 18, a transfer tube 19 is fixedly connected to the bottom of the connecting tube 13, a plurality of gas outlet tubes 20 are fixedly connected to the bottom of the transfer tube 19, a reaction hole 21 is provided on the outer surface of the gas outlet tube 20, a sealing ring 22 is fixedly installed on the top of the inner cavity of the transfer tube 19, a plurality of pillars 23 are fixedly connected to the inner wall of the transfer tube 19, a movable plate 24 is movably connected to the outer surface of the pillar 23, a sealing plate 25 is fixedly connected to the top of the movable plate 24, the top of the sealing plate 25 is in contact with the sealing ring 22, the inner cavity of the liquid storage tube 18 is filled with a chemical treatment liquid, the liquid level of the chemical treatment liquid is higher than the sealing plate 25, a plurality of gas outlet tubes 16 are fixedly connected to the outer surface of the connecting tube 13;

[0028] This device has been redesigned to improve the waste gas treatment efficiency by ventilating the liquid surface of the chemical treatment liquid. A partition 2 is provided and fixed on the inner wall of the treatment box 1 to divide the inner cavity of the treatment box 1 into an upper and lower treatment chamber. After preliminary filtration in the upper treatment chamber, the waste gas enters the connecting pipe 13 and the lower treatment chamber under the action of the fan 12. The rotating cylinder 19 provided below the liquid surface of the chemical treatment liquid makes the moving plate 24 and the sealing plate 25 contact with the sealing ring 22 under the action of the liquid pressure to form a seal, so that the air pressure of the waste gas entering the connecting pipe 13 is completely concentrated in the four groups of outlet pipes. In one embodiment, an outlet pipe 16 is designed with one end of the outlet gas inclined, so that the exhaust gas can act on the chemical treatment liquid in the liquid storage cylinder 18 after being ejected from the outlet pipe 16. While being consumed in the neutralization reaction, the chemical treatment liquid is driven to rotate counterclockwise around the axis of the liquid storage cylinder 18 to form a vortex, and the liquid level in the middle of the liquid storage cylinder 18 is lowered, so that the movable plate 24 and the sealing plate 25 move downward and break away from the abutment with the sealing ring 22, so that the exhaust gas entering the inner cavity of the transfer cylinder 19 can fully react with the chemical treatment liquid along the outlet pipe 20 and the reaction hole 21, thereby greatly improving the exhaust gas treatment efficiency of the device.

[0029] Then, the device utilizes the kinetic energy of the exhaust gas ejected from the outlet pipe 16 to be converted into the kinetic energy of the vortex of the chemical treatment liquid stored in the liquid storage cylinder 18, so that the pressure in the central area of ​​the liquid surface is lower than the pressure in the outer periphery, thereby causing the chemical liquid to generate a centripetal pulling force from the periphery to the center of the vortex. This centripetal pulling force specifically acts on the outlet end of each group of outlet pipes 16. Even if the height of the outer periphery of the liquid surface increases due to the vortex, thereby increasing the liquid pressure, the centripetal pulling force generated by the vortex can reduce the outlet resistance at one end of the outlet pipe 16 caused by the increase in liquid pressure with height, thereby allowing the chemical treatment liquid to always maintain an efficient vortex state.

[0030] Among them, a fixing ring 6 is fixedly connected to the bottom of the cover plate 4, a permanent magnetic ring 10 is fixedly connected to the bottom of the inner wall of the fixing ring 6, a sealing strip 11 is glued to one side of the inner wall of the fixing ring 6, and a metal mounting ring 7 is magnetically connected to the inside of the fixing ring 6 through the permanent magnetic ring 10, the inner ring surface of the metal mounting ring 7 is in contact with the sealing strip 11, and a filter screen 8 is fixedly installed at the bottom of the metal mounting ring 7;

[0031] The device has also redesigned the air intake filter part mainly composed of the cover plate 4, the air intake pipe 5 and the filter screen 8, so that the entire filter screen 8 is easy to disassemble and maintain. The cover plate 4 is pressed and installed on the top of the treatment box 1 through the fixing plate 3 and bolts to form an overall detachable design. At the same time, the gravity of the cover plate 4, the air intake pipe 5, the fixing ring 6, the metal mounting ring 7, the filter screen 8, the permanent magnetic ring 10 and the sealing strip 11 is used to automatically reinforce the cover plate 4 to prevent it from loosening. Internally, the permanent magnetic ring 10 on the top of the inner wall of the fixing ring 6 is magnetically connected to the metal mounting ring 7, and an annular abutting sealing layer is formed by the sealing strip 11 to prevent exhaust gas from leaking to the outside of the filter screen 8. The magnetic design of the metal mounting ring 7 and the permanent magnetic ring 10 enables the filter screen 8 to be more easily removed, and the flexible material design of the sealing strip 11 is used to reinforce the fixation of the metal mounting ring 7.

[0032] Among them, the outer surface of the connecting pipe 13 is fixedly installed with a drainage cover 14 located above the outlet pipe 16, the top of the drainage cover 14 is fixedly connected with a connecting pipe 26, one end of the connecting pipe 26 passes through the outside of the processing box 1 to the left, and is fixedly connected with a fan 27, the outlet end of the fan 27 is connected with the processing box 28, the upper side of the inner wall of the inner cavity of the processing box 28 is installed with a heater 29, the middle part of the inner wall of the processing box 28 is fixedly installed with a catalytic bed 30, and the bottom of the left side of the processing box 28 is fixedly connected with an exhaust pipe 9;

[0033] The interior of the treatment box 28 forms a catalytic reaction environment with a heating function through the heater 29 and the catalyst bed 30. The exhaust gas passes through the inner cavity of the treatment box 28 downward under the guidance of the connecting pipe 26 and the fan 27, and is heated by the heater 29. The catalysis of the catalyst bed 30 can convert hydrocarbons in the exhaust gas into carbon dioxide and water.

[0034] The drainage cover 14 is in the shape of a pot cover and covers the outer edge of the top of the liquid storage cylinder 18, and a gap is left between the drainage cover 14 and the liquid storage cylinder 18;

[0035] The drainage hood 14 is covered above the liquid storage cylinder 18, which can effectively guide all the waste gas treated by the liquid storage cylinder 18 into the connecting pipe 2 26, and the gap between the inner outer edge of the drainage hood 14 and the liquid storage cylinder 18 prevents the drainage hood 14 from completely sealing the top of the liquid storage cylinder 18, preventing the chemical liquid from entering the connecting pipe 2 26 under the action of atmospheric pressure.

[0036] Among them, the air outlet pipe 16 is arranged in four groups and is distributed at equal angles at the bottom of the vertical part of the outer surface of the connecting pipe 13. The air outlet end of the air outlet pipe 16 is inclined. An anti-blocking cylinder 17 is fixedly installed at one inclined end of the outer surface of the air outlet pipe 16. The bottom of the anti-blocking cylinder 17 is provided with a symmetrical pointed cone structure.

[0037] like Fig. 9 As shown, the outlet pipe 16 is designed to be "L" shaped as a whole, and its cross-section is circular. Its inclined design enables the high-pressure exhaust gas discharged from one end of the outlet to act on the chemical treatment liquid in the liquid storage cylinder 18, which helps to fully contact and react with the acidic gas in the exhaust gas. The symmetrical pointed cone design at the bottom of the baffle cylinder 17 also reduces the resistance encountered by the chemical treatment liquid during rotation.

[0038] The area value of the moving plate 24 is greater than the area value of the sealing plate 25, the sealing plate 25 is made of a rubber block, and the outer ring area value of the sealing ring 22 is smaller than the area value of the sealing plate 25;

[0039] The movable plate 24, the sealing plate 25 and the sealing ring 22 form a mutual abutment seal, producing a "one-way valve", that is, as the liquid level of the chemical treatment liquid in the liquid storage cylinder 18 rises, the movable plate 24 and the sealing plate 25 rise synchronously under the action of buoyancy, and make the sealing plate 25 abut against the bottom of the sealing ring 22 to form a seal to prevent the chemical treatment liquid from entering the sealing ring 22. When the liquid level is higher, the liquid pressure generated on the movable plate 24 and the sealing plate 25 is greater, thereby maintaining the sealing of the sealing ring 22 and the sealing plate 25. After the liquid level drops, the movable plate 24 and the sealing plate 25 can automatically detach from the sealing ring 22.

[0040] The outer surface of the movable plate 24 is provided with a plurality of groups of "U"-shaped grooves, which are adapted and snap-fitted with the pillars 23, and the area of ​​the movable plate 24 is smaller than the area of ​​the inner cavity of the rotating cylinder 19;

[0041] The “U”-shaped groove formed on the surface of the movable plate 24 enables it to be adapted and engaged with the support pillar 23 , and provides position limiting and guiding functions when the movable plate 24 moves up and down.

[0042] The sealing strip 11 is made of a rubber block, the axial cross-section of the metal mounting ring 7 is in an "L" shape, and the sealing strip 11 is completely wrapped around the inner wall of the fixing ring 6;

[0043] The sealing strip 11 not only makes the metal mounting ring 7 and the fixing ring 6 completely sealed after being combined, but also the resilience generated by the sealing strip 11 after being squeezed can assist in fixing the metal mounting ring 7 .

[0044] Working principle:

[0045] First, start the fan 12 and generate negative pressure, suck the exhaust gas into the device along the air inlet pipe 5, the exhaust gas enters the bottom of the cover plate 4 through the air inlet pipe 5, enters the upper processing chamber, and completes the first filtration through the filter screen 8 to remove large particles of impurities. The exhaust gas that has been filtered for the first time is pumped into the lower processing chamber by the fan 12 and the connecting pipe 13. Figure 3 As shown, the exhaust gas flows down along the connecting pipe 13 and enters the inner cavity of the outlet pipe 16 and the transfer cylinder 19 respectively;

[0046] Then, since the liquid level of the chemical treatment liquid in the liquid storage cylinder 18 is higher than the sealing plate 25, at this time, the movable plate 24 and the sealing plate 25 abut against the bottom of the sealing ring 22 under the action of buoyancy and form a seal. At this time, since the liquid level is higher than the sealing plate 25, the hydraulic pressure is greater than the air pressure of the exhaust gas entering the inner cavity of the transfer cylinder 19. Therefore, the exhaust gas can only be discharged along the outlet pipe 16 and enter the liquid storage cylinder 18 to react with the chemical treatment liquid therein. At the same time, due to the inclined design of the outlet end of the outlet pipe 16, the positive pressure from the fan 12 drives the exhaust gas to push the exhaust gas located in the storage cylinder 19. The chemical treatment liquid in the liquid cylinder 18 causes the chemical treatment liquid to rotate and form a vortex. The liquid level of the chemical treatment liquid at the center of the vortex is lowered, so that the pressure of all liquids in the movable plate 24 and the sealing plate 25 is reduced. At this time, the movable plate 24 and the sealing plate 25 move downward under the action of the exhaust gas pressure, so that the sealing plate 25 and the sealing ring 22 are separated from the abutment, and a gap is generated between the two. The exhaust gas moves downward along the gap to the outlet pipe 20, and fully contacts and reacts with the chemical treatment liquid. When the liquid rotates, the pointed cone structure of the anti-blocking cylinder 17 reduces the resistance of the liquid when it rotates;

[0047] Finally, the acidic gas in the waste gas is neutralized and absorbed by the chemical treatment liquid in the liquid storage cylinder 18. The treated waste gas enters the connecting pipe 26 along the drainage cover 14, and the fan 27 is started to suck the waste gas into the inner cavity of the treatment box 28. Figure 3 As shown, the heater 29 heats the exhaust gas flowing downward and makes the exhaust gas pass through the catalyst bed 30. Under the action of heating and catalysis, the hydrocarbons in the exhaust gas are converted into water and carbon dioxide, and then discharged into the environment through the exhaust pipe 9.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste gas treatment device for petrochemical industry, comprising a treatment box 1 (1) and a treatment box 2 (28) installed on the left side of the treatment box 1 (1), wherein a partition (2) is fixedly installed on the inner wall of the treatment box 1 (1), and the inner cavity of the treatment box 1 (1) is divided into an upper treatment cavity and a lower treatment cavity by the partition (2), characterized in that: A plurality of fixed plates (3) are installed on the top of the inner wall of the treatment box (1), a cover plate (4) and an air inlet pipe (5) are installed on the top of the fixed plate (3) by bolt compression, a fan (12) is fixedly installed on the right side of the treatment box (1), one end of the fan (12) is fixedly connected to a connecting pipe (13), the connecting pipe (13) extends to the lower treatment chamber and is connected to the upper treatment chamber through the fan (12), a liquid storage cylinder (18) is fixedly installed on the bottom of the inner wall of the lower treatment chamber, the right side of the liquid storage cylinder (18) is fixedly connected to a liquid replenishing pipe (15), a liquid discharge pipe (31) is installed at the bottom of the liquid storage cylinder (18), the bottom end of the connecting pipe (13) is fixedly connected to a transfer cylinder (19), and the bottom of the transfer cylinder (19) is fixedly connected to a plurality of air outlet pipes Two (20), a reaction hole (21) is provided on the outer surface of the second gas outlet pipe (20), a sealing ring (22) is fixedly installed on the top of the inner cavity of the rotating cylinder (19), a plurality of groups of pillars (23) are fixedly connected to the inner wall of the rotating cylinder (19), a movable plate (24) is movably connected to the outer surface of the pillar (23), a sealing plate (25) is fixedly connected to the top of the movable plate (24), the top of the sealing plate (25) is in contact with the sealing ring (22), the inner cavity of the liquid storage cylinder (18) is filled with a chemical treatment liquid, the liquid level of the chemical treatment liquid is higher than the sealing plate (25), the movable plate (24) and the sealing plate (25) are in contact with the bottom of the sealing ring (22) under the action of buoyancy, and a plurality of groups of gas outlet pipes (16) are fixedly connected to the outer surface of the connecting pipe (13); The bottom of the cover plate (4) is fixedly connected to a fixing ring (6), the bottom of the inner wall of the fixing ring (6) is fixedly connected to a permanent magnetic ring (10), a sealing strip (11) is glued to one side of the inner wall of the fixing ring (6), the inside of the fixing ring (6) is magnetically connected to a metal mounting ring (7) through the permanent magnetic ring (10), the inner ring surface of the metal mounting ring (7) is in contact with the sealing strip (11), and a filter screen (8) is fixedly installed at the bottom of the metal mounting ring (7), the outlet pipe (16) is arranged in four groups and is distributed at equal angles at the bottom of the vertical part of the outer surface of the connecting pipe (13), the outlet end of the outlet pipe (16) is inclined, the positive pressure from the fan (12) drives the exhaust gas to push the chemical treatment liquid in the liquid storage cylinder (18), so that the chemical treatment liquid rotates and forms a vortex, the liquid level of the chemical treatment liquid at the center of the vortex is lowered, the moving plate (24), the sealing plate (2 5) moves downward under the action of the exhaust gas pressure, so that the sealing plate (25) and the sealing ring (22) are separated from each other. A blocking tube (17) is fixedly installed at an inclined end of the outer surface of the outlet pipe (16). The bottom of the blocking tube (17) is provided with a symmetrical pointed cone structure. The area value of the movable plate (24) is greater than the area value of the sealing plate (25). The sealing plate (25) is made of a rubber block. The outer ring area value of the sealing ring (22) is smaller than the area value of the sealing plate (25). The outer surface of the movable plate (24) is provided with a plurality of groups of "U"-shaped grooves. The "U"-shaped grooves are adapted to be snap-fitted with the pillars (23). The area value of the movable plate (24) is smaller than the area value of the inner cavity of the transfer tube (19). The sealing strip (11) is made of a rubber block. The axial cross-section shape of the metal mounting ring (7) is "L"-shaped, and the sealing strip (11) is completely wrapped around the inner wall of the fixed ring (6).

2. The petrochemical waste gas treatment device according to claim 1, characterized in that: The outer surface of the connecting pipe 1 (13) is fixedly mounted with a drainage hood (14) located above the outlet pipe 1 (16); the top of the drainage hood (14) is fixedly connected with a connecting pipe 2 (26); one end of the connecting pipe 2 (26) passes through the outside of the treatment box 1 (1) to the left and is fixedly connected with a fan 2 (27); the outlet end of the fan 2 (27) is connected with the treatment box 2 (28); a heater (29) is installed on the upper side of the inner wall of the inner cavity of the treatment box 2 (28); a catalytic bed (30) is fixedly mounted in the middle of the inner wall of the treatment box 2 (28); and the bottom of the left side of the treatment box 2 (28) is fixedly connected with an exhaust pipe (9).

3. A petrochemical waste gas treatment device according to claim 2, characterized in that: The drainage cover (14) is in the shape of a pot cover and covers the outer edge of the top of the liquid storage cylinder (18), and a gap is left between the drainage cover and the liquid storage cylinder (18).

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