A purification tower for chemical production based on isopropyl isocyanate

Abstract

The present invention relates to the technical field of waste gas purification, and particularly relates to a purification tower for chemical production based on isopropyl isocyanate, including a purification tower, an exhaust pipe, etc.; circular holes are provided on the purification tower; a first gas chamber is arranged inside the purification tower, and the circular holes are communicated with the first gas chamber; an exhaust pipe is installed on the purification tower. The present invention realizes that by making the waste gas spray out from each first gas groove, directly impacting the activated carbon fiber board, preventing the waste gas from escaping from the exhaust pipe without being filtered, and improving the treatment effect of the equipment on the waste gas; by scraping the pulverized powder attached to the surface of the activated carbon fiber board through a filter screen, avoiding the blockage of the activated carbon fiber board by the powder and affecting the waste gas filtration, improving the cleaning effect of the equipment on the activated carbon fiber board, and simultaneously intercepting the shed pulverized powder; by blocking the first gas groove with a baffle, the activated carbon fiber board can be replaced without stopping the machine, and at the same time, it is avoided that workers inhale waste gas and get poisoned during maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas purification, and particularly to a purification tower for chemical production based on isopropyl isocyanate. Background Art

[0002] During the processing of isopropyl isocyanate, waste gas is easily generated, and this waste gas is often toxic. Therefore, it needs to be filtered by waste gas filtration equipment before being discharged to the outside world. While avoiding environmental pollution, it also prevents workers from inhaling the waste gas and getting poisoned. Activated carbon fiber boards belong to one of the waste gas filtration methods, using their small pore gaps to intercept harmful particles in the waste gas to achieve the filtration effect. In the prior art, activated carbon fiber boards are placed in the tower in a stacked manner, and the waste gas passes through each layer of activated carbon fiber boards from top to bottom to achieve filtration. This method results in the largest filtration pressure on the first layer of activated carbon fiber boards. When the waste gas passes through the activated carbon fiber boards in sequence, the utilization rate of the activated carbon fiber boards in contact with the waste gas is lower and lower. At the same time, the activated carbon fiber boards that first come into contact with the waste gas are extremely prone to clogging and need to be replaced frequently. When the waste gas flows between two activated carbon fiber boards, although the above problems are avoided, it is difficult for the waste gas to actively pass through the activated carbon fiber boards, and some waste gas is easily directly discharged along the flow channel, resulting in poor waste gas filtration effect.

[0003] At the same time, due to the high flexibility but poor compressive resistance of the activated carbon fiber boards, during the long-term use of the activated carbon fiber boards, under the long-term scouring of the dynamic airflow of the waste gas, the surface of the activated carbon fiber boards is easily pulverized to produce powder. This will cause the pulverized and shed powder to be discharged together with the purified waste gas, polluting the external environment. Further, the pulverized powder adhering to the surface of the activated carbon fiber boards is also easily clogged in the small pores of the activated carbon fiber boards, affecting the filtration ability of the activated carbon fiber boards.

[0004] In summary, the present application proposes a purification tower for chemical production based on isopropyl isocyanate to improve the above-mentioned technical problems. Summary of the Invention

[0005] In order to overcome the disadvantages of uneven filtration efficiency, easy clogging, secondary pollution caused by material pulverization, and decline in filtration ability in the prior art when using stacked activated carbon fiber boards to filter waste gas, the present invention provides a purification tower for chemical production based on isopropyl isocyanate.

[0006] Technical solution: A purification tower for chemical production based on isopropyl isocyanate, comprising a purification tower, an exhaust pipe and an activated carbon fiber board; circular holes are provided on the purification tower; a first air chamber is arranged inside the purification tower, and the circular holes are communicated with the first air chamber; an exhaust pipe is installed on the purification tower; a number of activated carbon fiber boards are equidistantly distributed in the purification tower from top to bottom; it also includes a partition board, a flow dividing board and a cleaning assembly; a number of partition boards are fixedly connected to the left part inside the purification tower; a number of first rotating plates are rotatably connected between every two adjacent partition boards; a cleaning assembly for cleaning the pulverized powder of the activated carbon fiber board is slidably connected inside the purification tower; a number of flow dividing boards for enabling the waste gas to fully contact the activated carbon fiber board are arranged on the cleaning assembly, and the flow dividing boards are arranged in a hollow shape; a number of first air grooves are formed on each flow dividing board; each flow dividing board is located between two activated carbon fiber boards.

[0007] Further description, in the above purification tower for chemical production based on isopropyl isocyanate, the cleaning assembly includes a guiding frame, an exhaust pipe, an intake pipe, a sliding plate, a slide rail and an electric slider; a number of guiding frames are fixedly connected to the right part inside the purification tower; a number of second rotating plates are rotatably connected between every two adjacent guiding frames; a second air chamber is jointly formed between all the guiding frames, the second rotating plates and the purification tower; an exhaust pipe for cleaning the pulverized powder of the activated carbon fiber board is communicated with the upper right part of the purification tower, and the exhaust pipe is connected to an external air extraction device, and the air extraction device is connected to a collection bag; a number of intake pipes are communicated with the purification tower, and all the intake pipes are connected to an external air pumping device; each intake pipe is located between two adjacent flow dividing boards; a sliding plate is slidably connected to the right side of each flow dividing board through a spring; a second air groove is formed on the right side of each flow dividing board; each sliding plate covers the adjacent second air groove; a number of slide rails are fixedly connected inside the purification tower; an electric slider is slidably connected to each slide rail; every two front and rear opposite electric sliders are jointly fixedly connected to the corresponding flow dividing board.

[0008] Further description, in the above purification tower for chemical production based on isopropyl isocyanate, it also includes a filter screen; a number of filter screens for preventing the pulverized powder of the activated carbon fiber board from flowing out to the outside are connected to the upper side and the lower side of each flow dividing board.

[0009] Further description, the frame of each filter screen is coated with rubber.

[0010] Further description, the inner wall of each flow dividing board is coated with an anti-adhesion coating.

[0011] Further description, a diaphragm is arranged between each electric slider and the purification tower.

[0012] Further description, each first air groove is inclined to the right.

[0013] Further explanation: In the above purification tower for chemical production based on isopropyl isocyanate, there are also tie rods and baffles; A tie rod for facilitating workers to extract the activated carbon fiber board for maintenance is fixedly connected to the front side of each activated carbon fiber board; Each activated carbon fiber board is detachably connected to the purification tower; A baffle for preventing waste gas from overflowing is slidably connected to each flow dividing plate through a spring; Each baffle slides left and right within the adjacent flow dividing plate; A number of third air grooves are formed in each baffle.

[0014] Further explanation: In the above purification tower for chemical production based on isopropyl isocyanate, there are also electromagnets; A number of electromagnets for improving the cleaning effect of the equipment on the pulverized powder of the activated carbon fiber board are fixedly connected to the upper side of each flow dividing plate; Each filter screen is rotatably connected to the adjacent flow dividing plate, and one end of the filter screen frame away from the flow dividing plate is made of magnetic material; A number of limiting grooves are provided on each flow dividing plate; A stop block is provided on the rotating shaft of each filter screen, and each stop block is located within the adjacent limiting groove.

[0015] Further explanation: A sealing strip is provided between each activated carbon fiber board and the purification tower.

[0016] The beneficial effects of the present invention are as follows: The present invention realizes that by making the waste gas spray out from each first air groove and directly impact the activated carbon fiber board, the waste gas actively flows towards the activated carbon fiber board, preventing the waste gas from escaping from the exhaust pipe without being filtered, and improving the waste gas treatment effect of the equipment;

[0017] The pulverized powder attached to the surface of the activated carbon fiber board is scraped off by the filter screen, avoiding the blockage of the activated carbon fiber board by the powder and affecting the waste gas filtration, improving the cleaning effect of the equipment on the activated carbon fiber board, and at the same time, the filter screen can also intercept the falling pulverized powder;

[0018] By using the baffle to block the first air groove, the activated carbon fiber board can be replaced without stopping the machine, and at the same time, it can prevent workers from inhaling waste gas and getting poisoned during maintenance, improving the protection ability of the equipment for workers;

[0019] By controlling the power-off of the electromagnet, the flowing of the air flow can carry away the pulverized powder on each filter screen, improving the cleaning ability of the equipment for the pulverized powder. Description of the Drawings

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the purification tower for chemical production based on isopropyl isocyanate of the present invention;

[0021] Figure 2 It is a sectional view of the purification tower of the present invention;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the combination of the filter screen and the slide plate of the present invention;

[0023] Figure 4Front view of the exhaust pipe, partition plate and flow splitter of the present invention;

[0024] Figure 5 Schematic diagram of the combined three-dimensional structure of the flow splitter, slide rail and electric slider of the present invention;

[0025] Figure 6 Front view of the flow splitter, guiding frame and exhaust pipe of the present invention;

[0026] Figure 7 For the present invention Figure 6 Enlarged view of area A in

[0027] Figure 8 Side view of the flow splitter and sliding plate of the present invention;

[0028] Figure 9 Schematic diagram of the three-dimensional structure of the pull rod of the present invention;

[0029] Figure 10 Schematic diagram of the combined three-dimensional structure of the filter screen, baffle and electromagnet of the present invention;

[0030] Figure 11 Diagram of the storage state of the baffle of the present invention;

[0031] Figure 12 Side view of the flow splitter and filter screen of the present invention.

[0032] In the above drawings: 1 - purification tower, 1001 - round hole, 1002 - first air chamber, 1003 - second air chamber, 2 - exhaust pipe, 3 - partition plate, 3001 - first rotating plate, 4 - flow splitter, 4001 - first air groove, 4002 - second air groove, 4003 - limiting groove, 5 - activated carbon fiber board, 101 - guiding frame, 10101 - second rotating plate, 102 - exhaust pipe, 103 - intake pipe, 104 - filter screen, 10401 - stop block, 105 - sliding plate, 106 - slide rail, 107 - electric slider, 201 - pull rod, 202 - baffle, 20201 - third air groove, 203 - electromagnet. Detailed implementation manners

[0033] The present invention will be further described below in conjunction with the drawings and specific implementation manners.

[0034] Embodiment 1

[0035] As Figures 1-8 shown, a purification tower for chemical production based on isopropyl isocyanate includes a purification tower 1, an exhaust pipe 2 and an activated carbon fiber board 5; a round hole 1001 is provided on the purification tower 1; a first air chamber 1002 is provided inside the purification tower 1, and the round hole 1001 is communicated with the first air chamber 1002; an exhaust pipe 2 is installed on the purification tower 1; a plurality of activated carbon fiber boards 5 are equidistantly distributed from top to bottom inside the purification tower 1;

[0036] It further includes a partition plate 3, a flow splitter plate 4 and a cleaning component; a plurality of partition plates 3 are fixedly connected to the left part inside the purification tower 1; two first rotating plates 3001 are rotatably connected between every two adjacent partition plates 3; a cleaning component is slidably connected inside the purification tower 1; a plurality of flow splitter plates 4 are arranged on the cleaning component, and the flow splitter plate 4 is arranged in a hollow shape; a plurality of first air grooves 4001 are formed in each flow splitter plate 4; each flow splitter plate 4 is located between two activated carbon fiber plates 5.

[0037] The cleaning component includes a guiding frame 101, an air extraction pipe 102, an air inlet pipe 103, a sliding plate 105, a sliding rail 106 and an electric slider 107; a plurality of guiding frames 101 are fixedly connected to the right part inside the purification tower 1; two second rotating plates 10101 are rotatably connected between every two adjacent guiding frames 101; a second air cavity 1003 is jointly formed between all the guiding frames 101 and the second rotating plates 10101 and the purification tower 1; an air extraction pipe 102 is communicated with the upper right part of the purification tower 1, and the air extraction pipe 102 is connected to an external air extraction device, and the air extraction device is connected to a collection bag; a plurality of air inlet pipes 103 are communicated with the purification tower 1, and each air inlet pipe 103 is jointly connected to an external air pumping device; each air inlet pipe 103 is located between two adjacent flow splitter plates 4; a sliding plate 105 is slidably connected to the right side of each flow splitter plate 4 through a spring; a second air groove 4002 is formed in the right side of each flow splitter plate 4; each sliding plate 105 covers the adjacent second air groove 4002; a plurality of sliding rails 106 are fixedly connected inside the purification tower 1; an electric slider 107 is slidably connected to each sliding rail 106; every two front and rear opposite electric sliders 107 are jointly fixedly connected to the corresponding flow splitter plate 4.

[0038] It further includes a filter screen 104; a plurality of filter screens 104 are connected to the upper side and the lower side of each flow splitter plate 4.

[0039] The frame of each filter screen 104 is coated with rubber to prevent the filter screen 104 from scratching the activated carbon fiber plate 5 and ensure the filtering effect of the activated carbon fiber plate 5.

[0040] An anti-adhesion coating is applied to the inner wall of each flow splitter plate 4 to reduce the adhesion of the powdered activated carbon fiber plate 5 to the inside of the flow splitter plate 4 and facilitate the flow of air.

[0041] A diaphragm is arranged between each electric slider 107 and the purification tower 1.

[0042] Each first air groove 4001 is inclined to the right, which can ensure that the waste gas flows towards the activated carbon fiber plate 5 while avoiding the direct impact of the air flow on the activated carbon fiber plate 5 and reducing the damage of the air flow to the activated carbon fiber plate 5.

[0043] After connecting the external pipeline to the circular hole 1001, the waste gas is introduced into the circular hole 1001 and the first air chamber 1002 through this pipeline. Subsequently, the waste gas is filtered under the interception of the activated carbon fiber board 5, and finally the filtered waste gas is discharged through the exhaust pipe 2.

[0044] In the prior art, the activated carbon fiber boards 5 are stacked and arranged from top to bottom, and the waste gas passes through each layer of activated carbon fiber board 5 from bottom to top to complete the filtration. This will cause the activated carbon fiber board 5 that first contacts the waste gas to have the greatest filtration pressure. When the waste gas passes through the activated carbon fiber boards 5 in sequence, the utilization rate of the activated carbon fiber board 5 that contacts the waste gas later is lower. At the same time, the activated carbon fiber board 5 that first contacts the waste gas is extremely easy to be blocked and needs to be replaced frequently, affecting the waste gas purification efficiency. Therefore, based on the view from front to back, the activated carbon fiber boards 5 are installed equidistantly from top to bottom in the way as Figure 2 shown. After the waste gas enters the first air chamber 1002 through the circular hole 1001, it flows from left to right and finally is discharged through the exhaust pipe 2, so that the waste gas wanders between every two activated carbon fiber boards 5, enabling each activated carbon fiber board 5 to fully filter the waste gas and avoiding the phenomenon that the activated carbon fiber boards 5 contact the waste gas successively. When the waste gas is filtered while wandering between two adjacent activated carbon fiber boards 5, the waste gas is likely to directly flow along the gap between the two activated carbon fiber boards 5 to the exhaust pipe 2, that is, the waste gas is directly discharged without passing through the activated carbon fiber board 5. Therefore, by arranging a plurality of partition plates 3 in the purification tower 1 and using the partition plates 3 and the first rotating plate 3001 to block the first air chamber 1002, the waste gas is prevented from flowing to the exhaust pipe 2 through the first air chamber 1002. Then, all the electric sliders 107 are started to slide to the left on the slide rail 106, thereby driving all the flow dividing plates 4 to move to the left. The left side of the flow dividing plate 4 is used to push open the first rotating plate 3001 to the state as Figure 2 shown. Since the flow dividing plate 4 is arranged in a hollow shape, the waste gas only enters each flow dividing plate 4 under the blockage of the partition plate 3. At this time, the waste gas enters a narrower flow channel, and at the same time, the intake volume of the waste gas is increased, so the flow rate of the waste gas is accelerated. Subsequently, the waste gas is ejected from each first air groove 4001 and then sprayed onto each activated carbon fiber board 5, enabling the waste gas to actively flow towards the activated carbon fiber board 5, thereby filtering and purifying the waste gas, avoiding the waste gas being directly discharged through the exhaust pipe 2 along the gap between the two activated carbon fiber boards 5, improving the treatment effect of the equipment on the waste gas. At the same time, under the restriction and guidance of the flow dividing plate 4 and the first air groove 4001, the waste gas evenly flows towards the surface of each activated carbon fiber board 5, enabling the waste gas to fully contact each area of the activated carbon fiber board 5, improving the utilization rate of the activated carbon fiber board 5, and avoiding some areas of the activated carbon fiber board 5 losing the filtration function in advance.

[0045] When using the activated carbon fiber board 5 to filter and purify waste gas for a long time, due to the high flexibility but poor compressive resistance of the activated carbon fiber board 5, under the continuous flow and scouring of the waste gas, the surface of the activated carbon fiber board 5 gradually pulverizes, generating granular exfoliates. This will cause the pulverized powder to be discharged from the exhaust pipe 2 together with the purified waste gas, causing environmental pollution to the outside world. Therefore, after using the activated carbon fiber board 5 to filter the waste gas for a period of time, first stop introducing waste gas into the purification tower 1, and then control all the electric sliders 107 to slide to the right, thereby driving all the flow dividing plates 4 to move to the right to the position as shown in Figure 7 shown, pushing open all the second rotating plates 10101. During the movement of the slide plate 105 following the flow dividing plate 4, it is blocked by the guiding frame 101 and cannot continue to move to the right, thus opening the second air groove 4002, so that the second air groove 4002 is communicated with the second air chamber 1003. At this time, control the external air pumping equipment to start sending gas into each intake pipe 103, and then start pumping air into the exhaust pipe 102 through the external air extraction equipment, so that the exhaust pipe 102 extracts the gas in the second air chamber 1003. Since each intake pipe 103 is located between two adjacent flow dividing plates 4, that is, after the air flow enters from the intake pipe 103, it flows horizontally along the surface of the flow dividing plate 4, so that the gas in the first air chamber 1002 enters the flow dividing plate 4 through the first air groove 4001, and finally flows from the flow dividing plate 4 into the second air chamber 1003 and is pumped away. During this process, external gas continuously enters the first air chamber 1002 from the intake pipe 103, so that the pulverized powder on each activated carbon fiber board 5 is pumped away, and finally the pulverized powder is pumped into the collection bag by the air extraction equipment, avoiding the powder being directly discharged to the outside world and ensuring that the environment is not polluted. Further, a diaphragm is provided between each electric slider 107 and the purification tower 1. During the sliding process of the electric slider 107, the diaphragm is continuously stretched and contracted. The diaphragm can prevent waste gas from infiltrating into the joint surface of the electric slider 107 and the slide rail 106, avoiding corrosion and extending the service life of the equipment.

[0046] In addition, the particles generated by the pulverization of the surface of the activated carbon fiber board 5 may either fall off or adhere to the surface of the fiber board. The adhered particles will block the pores of the activated carbon and reduce the filtration efficiency, thereby affecting the filtration effect of the waste gas. Therefore, by providing a filter screen 104 on each flow dividing plate 4, during the process of the flow dividing plate 4 moving to the right to push open the second rotating plate 10101, the flow dividing plate 4 synchronously drives the filter screen 104 to move to the right, so that the filter screen 104 moves to the right while sticking to the surface of the adjacent activated carbon fiber board 5, thereby scraping off the adhered pulverized powder on the surface of the activated carbon fiber board 5. Then, the pulverized powder is pumped away and centrally collected by the exhaust pipe 102, avoiding the powder from blocking the activated carbon fiber board 5 and affecting the waste gas filtration, improving the cleaning effect of the equipment on the activated carbon fiber board 5. At the same time, the presence of the filter screen 104 can also intercept the fallen pulverized powder during the waste gas filtration, avoiding the powder from directly following the air flow and being discharged to the outside world through the exhaust pipe 2, further ensuring that the external environment is not polluted.

[0047] Example 2

[0048] Based on Example 1, as Figure 1 and Figures 9-12 shown, it further includes a pull rod 201 and a baffle 202; a pull rod 201 is fixedly connected to the front side of each activated carbon fiber plate 5; each activated carbon fiber plate 5 is detachably connected to the purification tower 1; a baffle 202 is slidably connected to each flow dividing plate 4 through a spring; each baffle 202 slides left and right in the adjacent flow dividing plate 4; a plurality of third air grooves 20201 are formed in each baffle 202.

[0049] It further includes an electromagnet 203; a plurality of electromagnets 203 are fixedly connected to the upper side of each flow dividing plate 4; each filter screen 104 is rotatably connected to the adjacent flow dividing plate 4, and one end of the frame of each filter screen 104 away from the flow dividing plate 4 is made of a magnetic material; a plurality of limiting grooves 4003 are provided on each flow dividing plate 4; a stopper 10401 is provided on the rotating shaft of each filter screen 104, and each stopper 10401 is located in the adjacent limiting groove 4003.

[0050] A sealing strip is provided between each activated carbon fiber plate 5 and the purification tower 1 to enhance the sealing effect between the activated carbon fiber plate 5 and the purification tower 1 and prevent waste gas from flowing out.

[0051] During the process of filtering and purifying waste gas, since the waste gas is poisonous and harmful to human inhalation, therefore, when workers replace the activated carbon fiber plate 5, they need to stop the equipment from filtering waste gas, and then disassemble and replace the activated carbon fiber plate 5. In order to facilitate workers to replace and maintain the activated carbon fiber plate 5 without affecting waste gas filtration, by controlling the two electric sliders 107 above and below a single activated carbon fiber plate 5 to slide to the right, that is, the two flow dividing plates 4 above and below the activated carbon fiber plate 5 move to the right to such an extent as Figure 11 shown, the left sides of the two flow dividing plates 4 are both attached to the right side of the first rotating plate 3001. At this time, the first rotating plate 3001 is in a closed state, and the baffle 202 is received in the flow dividing plate 4 under the extrusion of the first rotating plate 3001, thereby compressing the spring between the baffle 202 and the flow dividing plate 4, and at this time, the third air groove 20201 and the first air groove 4001 are as Figure 11As shown, they are in a staggered state, thereby closing the first air groove 4001. At this time, the first rotating plate 3001 is also in a closed state, so that waste gas cannot enter the two shunt plates 4 moving to the right. At this time, the worker only needs to pull the pull rod 201 to extract the activated carbon fiber plate 5 between the two shunt plates 4, and the activated carbon fiber plate 5 can be replaced and maintained without stopping the waste gas filtration. Since the first air grooves 4001 on the two shunt plates 4 are blocked by the baffle 202, the waste gas in the first air chamber 1002 cannot flow between the two shunt plates 4, that is, there is no waste gas leakage or circulation during the process of the worker disassembling the activated carbon fiber plate 5, avoiding the worker from inhaling waste gas and getting poisoned, and improving the protection ability of the equipment for the worker.

[0052] It is also considered that when the pulverized powder is intercepted by the filter screen 104, although the powder can be driven by the air flow to flow into the shunt plate 4 and finally be drawn away through the suction pipe 102, part of the air flow still flows along the upper and lower sides of the shunt plate 4. This causes part of the pulverized powder to be easily pushed against the filter screen 104 by the air flow and difficult to flow into the shunt plate 4. Therefore, when the pulverized powder needs to be collected, the electromagnet 203 is controlled to be powered off, so that the electromagnet 203 loses its magnetism. After the metal filter screen 104 loses the adsorption of the electromagnet 203, it falls to the right under the action of the air flow. It should be noted that during the tilting process of the filter screen 104, the stopper 10401 on the rotating shaft of the filter screen 104 always rotates in the limiting groove 4003. When an angle of 30 degrees is formed between the filter screen 104 and the surface of the shunt plate 4, the stopper 10401 on the rotating shaft of the filter screen 104 cannot continue to rotate under the limitation of the limiting groove 4003, that is, the angle of 30 degrees between the filter screen 104 and the surface of the shunt plate 4 cannot continue to fall, so that there is a distance between the filter screen 104 and the surface of the activated carbon fiber plate 5. When the air flow passes through the filter screen 104, the air flow drives the pulverized powder to flow to the right along the gap between the filter screen 104 and the activated carbon fiber plate 5, then enters the shunt plate 4 through the first air groove 4001, and finally is discharged to the second air chamber 1003 through the second air groove 4002 and is drawn away by the suction pipe 102, improving the cleaning ability of the equipment for the pulverized powder. After the cleaning is completed, the electromagnet 203 is restarted and powered on, so that the electromagnet 203 has magnetism, and then the filter screen 104 approaches the electromagnet 203 under the action of magnetism. Similarly, under the limitation of the limiting groove 4003, the filter screen 104 is in a state perpendicular to the shunt plate 4 and cannot continue to approach the electromagnet 203, so as to intercept the pulverized powder again by the filter screen 104.

[0053] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art.

Claims

1. A purification tower for chemical production based on isopropyl isocyanate, comprising a purification tower (1); a round hole (1001) is provided on the purification tower (1); a first gas chamber (1002) is arranged inside the purification tower (1), and the round hole (1001) is communicated with the first gas chamber (1002); an exhaust pipe (2) is installed on the purification tower (1); a plurality of activated carbon fiber plates (5) are equidistantly distributed from top to bottom inside the purification tower (1); it is characterized in that, On the left inner side of the purification tower (1), several partition plates (3) are fixedly connected; between every two adjacent partition plates (3), several first rotating plates (3001) are rotatably connected; a cleaning assembly for cleaning the pulverized powder of the activated carbon fiber board (5) is slidably connected in the purification tower (1); several flow dividing plates (4) for enabling the waste gas to fully contact the activated carbon fiber board (5) are arranged on the cleaning assembly, and the flow dividing plates (4) are arranged in a hollow shape; several first air grooves (4001) are formed in each flow dividing plate (4); each flow dividing plate (4) is located between two activated carbon fiber boards (5).

2. The purification tower for chemical production based on isopropyl isocyanate according to claim 1, characterized in that, The cleaning assembly includes a guiding frame (101); several guiding frames (101) are fixedly connected to the right inner side of the purification tower (1); several second rotating plates (10101) are rotatably connected between every two adjacent guiding frames (101); all the guiding frames (101) and the second rotating plates (10101) and the inner wall of the purification tower (1) jointly enclose a second air cavity (1003); an air extraction pipe (102) for cleaning the pulverized powder of the activated carbon fiber board (5) is communicated with the upper right part of the purification tower (1), and the air extraction pipe (102) is connected to an external air extraction device, and the air extraction device is connected to a collection bag; several air inlet pipes (103) are communicated with the purification tower (1), and all the air inlet pipes (103) are connected to an external air pumping device; each air inlet pipe (103) is located between two adjacent flow dividing plates (4); the right side of each flow dividing plate (4) is elastically connected to a sliding plate (105) through a spring, so that the sliding plate (105) can slide along the flow dividing plate (4); a second air groove (4002) is formed in the right side of each flow dividing plate (4); each sliding plate (105) covers the corresponding second air groove (4002); several slide rails (106) are fixedly connected in the purification tower (1); an electric slider (107) is slidably connected to each slide rail (106); every two front and rear opposite electric sliders (107) are jointly fixedly connected to the corresponding flow dividing plate (4).

3. The purification tower for chemical production based on isopropyl isocyanate according to claim 2, characterized in that, It further includes a filter screen (104); several filter screens (104) for preventing the pulverized powder of the activated carbon fiber board (5) from flowing out to the outside are connected to the upper side and the lower side of each flow dividing plate (4).

4. A purification tower for chemical production based on isopropyl isocyanate according to claim 3, characterized in that, The frame of each filter screen (104) is coated with rubber.

5. The purification tower for chemical production based on isopropyl isocyanate according to claim 3, characterized in that, The inner wall of each flow dividing plate (4) is coated with an anti-adhesion coating.

6. The purification tower for chemical production based on isopropyl isocyanate according to claim 2, characterized in that, A diaphragm is arranged between each electric slider (107) and the purification tower (1).

7. A purification tower for chemical production based on isopropyl isocyanate according to claim 1, characterized in that, Each first air groove (4001) is inclined to the right.

8. A purification tower for chemical production based on isopropyl isocyanate according to claim 6, characterized in that, It further includes a pull rod (201); a pull rod (201) for facilitating the worker to pull out the activated carbon fiber board (5) for maintenance is fixedly connected to the front side of each activated carbon fiber board (5); each activated carbon fiber board (5) is detachably connected to the purification tower (1); a baffle (202) for preventing the waste gas from overflowing is slidably connected in each flow dividing plate (4) through a spring; each baffle (202) slides left and right in the adjacent flow dividing plate (4); several third air grooves (20201) are formed in each baffle (202).

9. The purification tower for chemical production based on isopropyl isocyanate according to claim 8, characterized in that, It further includes an electromagnet (203); a number of electromagnets (203) for improving the cleaning effect of the powdered activated carbon fiber board (5) on each shunt plate (4) are fixedly connected to the upper side; each filter screen (104) is rotatably connected to the adjacent shunt plate (4), and one end of the frame of each filter screen (104) far from the shunt plate (4) is made of magnetic material; a number of limiting grooves (4003) are provided on each shunt plate (4); a stopper (10401) is provided on the rotating shaft of each filter screen (104), and each stopper (10401) is located in the adjacent limiting groove (4003).

10. A purification tower for chemical production based on isopropyl isocyanate according to claim 9, characterized in that, A sealing strip is provided between each activated carbon fiber board (5) and the purification tower (1).

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