Catalytic agent suction device for pentachloropyridine production
By designing a catalyst extraction device, the problem of tail gas leakage during catalyst replacement in pentachloropyridine production was solved, realizing the collection of tail gas and safe extraction of catalyst, protecting operators and the environment, and simplifying the operation process.
Patent Information
- Application Number
- CN202422173518.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-09-04
AI Technical Summary
During the production of pentachloropyridine, exhaust gas leakage during catalyst replacement in the fixed bed leads to environmental pollution and health hazards to operators.
A catalyst extraction device was designed, including a movable frame, an air extraction pump, and a suction pump. The movement of the movable plate controls the connection between the air extraction pipe and the suction pipe and the through hole, thereby realizing the collection of exhaust gas and the extraction of catalyst, and preventing exhaust gas leakage.
It effectively prevents the leakage of harmful exhaust gases from the fixed bed during catalyst replacement, protects the safety of operators, is simple and easy to use, and ensures environmentally friendly emissions through exhaust gas treatment components.
Smart Images
Figure CN223615847U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pentachloropyridine production technology, and in particular to a catalyst suction device for pentachloropyridine production. Background Technology
[0002] Pentachloropyridine is an important intermediate in organic synthesis reactions and a key raw material for the production of insecticides and herbicides such as chlorpyrifos, dichloropyridine acid, and fluroxypyr. At the same time, pentachloropyridine is also a pharmaceutical intermediate and can be used to produce active ingredients for cardiovascular, cerebrovascular and other drugs.
[0003] The various reactions in the pentachloropyridine production process are usually carried out in a fixed bed, and the fixed bed requires activated carbon-loaded metal salts as catalysts to accelerate the reaction. When the catalyst reaches the end of its service life and needs to be replaced, the end cap of the fixed bed must be disassembled and the catalyst removed from the fixed bed. Since the pentachloropyridine production process produces tail gas containing toxic and harmful gases such as hydrogen chloride and chlorine, the tail gas remaining in the fixed bed after the lower end cap is removed will leak into the external environment, causing environmental pollution and harming the health of operators. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides a catalyst suction device for pentachloropyridine production, which solves the problem of tail gas leakage when changing catalysts in fixed beds in existing technologies.
[0005] According to an embodiment of this utility model, a catalyst suction device for pentachloropyridine production includes a movable frame, a vacuum pump, and a suction pump. The movable frame has a main body and a cover. The main body has a receiving cavity, and the cover covers the opening of the receiving cavity. A sliding groove is provided in the receiving cavity. Two through holes communicating with the sliding groove are spaced apart along the length of the sliding groove on the main body. A movable plate that can move along the length of the sliding groove is provided in the sliding groove, and a first driving assembly that is drivenly connected to the movable plate is provided in the receiving cavity. Two through holes are spaced apart along the length of the sliding groove on the movable plate. When the moving component drives the movable plate to a position where one of the through holes aligns with one of the through holes, the other through hole and the other through hole are misaligned. The accommodating cavity is also provided with two guide sleeves, and the two guide sleeves are respectively attached to the side of the movable plate away from the through hole. The guide sleeves are respectively provided with guide holes, and the guide holes are aligned with the through holes one by one. It also includes an air extraction pipe and a suction pipe. One end of the air extraction pipe is connected to one of the guide holes, and the other end passes through the main body and is connected to the air extraction pump. One end of the suction pipe extends into the other guide hole and can move in the guide sleeve, and the other end passes through the cover and is connected to the suction pump.
[0006] Furthermore, the main body is provided with a plurality of connecting seats at intervals around the opening of the accommodating cavity, and each connecting seat is provided with a rotatable pressing block. The pressing block abuts against the side of the cover away from the main body and presses the cover tightly onto the main body.
[0007] Furthermore, the first drive assembly includes a first cylinder and a first piston rod disposed at the output end of the first cylinder. The first cylinder drives the first piston rod to reciprocate along the length direction of the slide groove, and one end of the first piston rod is fixedly connected to the movable plate.
[0008] Furthermore, a guide tube is provided on the side of the cover near the accommodating cavity, the guide tube wraps around the suction tube and communicates with the guide hole that accommodates the suction tube.
[0009] Furthermore, the main body is also provided with a cover, which includes a first annular plate, a flexible cover, and a second annular plate connected in sequence. The first annular plate is fixedly connected to the main body, and the through hole communicates with the space enclosed by the flexible cover.
[0010] Furthermore, the main body is also provided with a second driving component that is connected to the second annular plate in a transmission manner. The second driving component drives the second annular plate to move up and down in the vertical direction and move closer to or away from the first annular plate.
[0011] Furthermore, the second drive assembly includes a second cylinder and a second piston rod disposed at the output end of the second cylinder. The second cylinder drives the second piston rod to reciprocate in the vertical direction, and one end of the second piston rod is fixedly connected to the second annular plate.
[0012] Furthermore, a handle is provided on one side of the movable frame, and the handle is spaced apart from the main body.
[0013] Furthermore, it also includes an exhaust gas treatment component, which is connected to the exhaust pump.
[0014] Furthermore, it also includes a collection tank, which is located between the main body and the suction pump and is connected to the suction pipe.
[0015] Compared with the prior art, this utility model has the following beneficial effects: By adopting two guide sleeves set in the main body to cooperate with the air extraction pipe and the suction pipe respectively, and two through holes set on the main body to be aligned with the guide holes on the two guide sleeves respectively, the first driving component drives the movable plate to move in the slide groove, which can control the guide hole to connect with the corresponding through hole or to separate the guide hole from the corresponding through hole. When the movable plate moves to the position where the guide hole accommodating the air extraction pipe, the through hole on the movable plate and the corresponding through hole are connected in sequence, the guide hole accommodating the suction pipe and the corresponding through hole are blocked by the movable plate. At this time, starting the air pump can make the air extraction pipe discharge after the fixed bed end cover is removed from the corresponding through hole. The exhaust gas is absorbed to prevent leakage. After the exhaust gas absorption is completed, the first drive component drives the movable plate to move to the position where the guide hole for accommodating the suction pipe, the through hole on the movable plate, and the corresponding through hole are connected in sequence. At this time, the guide hole for accommodating the suction pipe and the corresponding through hole are blocked by the movable plate. At this time, the movable suction pipe can be inserted into the fixed bed and the suction pump is started to suck out the catalyst in the fixed bed, thereby replacing the catalyst in the fixed bed. This solves the technical problem of exhaust gas leakage when replacing the catalyst in the fixed bed, and produces the technical effect of preventing the leakage of harmful exhaust gas in the fixed bed during the catalyst replacement process and protecting the personal safety of the operators. Moreover, it is simple to operate and easy to use. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a catalyst suction device for pentachloropyridine production according to an embodiment of the present invention;
[0017] Figure 2 This is a cross-sectional view of a portion of the structure of a catalyst suction device for pentachloropyridine production according to an embodiment of the present invention during the gas extraction process.
[0018] Figure 3 This is a top view of the main body of the catalyst suction device for pentachloropyridine production according to an embodiment of the present invention;
[0019] Figure 4 This is a cross-sectional view of a portion of the structure of a catalyst suction device for pentachloropyridine production according to an embodiment of the present invention during suction.
[0020] In the above figures: 1. Movable frame; 11. Cover; 12. Guide tube; 2. Air pump; 21. Air extraction pipe; 3. Suction pump; 31. Suction pipe; 4. Main body; 41. Receptacle; 42. Slide groove; 43. Through hole; 44. Movable plate; 45. Through hole; 46. Guide sleeve; 47. Guide hole; 48. Connecting seat; 49. Pressure block; 5. First drive assembly; 51. First cylinder; 52. First piston rod; 6. Cover; 61. First annular plate; 62. Flexible cover; 63. Second annular plate; 7. Second drive assembly; 71. Second cylinder; 72. Second piston rod; 8. Exhaust gas treatment assembly; 9. Collection tank. Detailed Implementation
[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.
[0022] like Figures 1 to 4 As shown in the figure, this utility model embodiment proposes a catalyst suction device for pentachloropyridine production, which is used to remove catalysts that have reached the end of their service life from the fixed bed and to collect the exhaust gas leaked during the removal of the end cover of the fixed bed, so as to prevent the exhaust gas from being emitted into the external environment and causing pollution.
[0023] Please refer to Figure 1 , Figure 2 and Figure 4The catalyst suction device for pentachloropyridine production includes a movable frame 1, a vacuum pump 2, and a suction pump 3. The movable frame 1 is movable on the ground to facilitate transporting the catalyst suction device for pentachloropyridine production to a position close to the fixed bed. The movable frame 1 is provided with a matching main body 4 and a cover 11. The main body 4 has a receiving cavity 41, and the cover 11 covers the opening of the receiving cavity 41. A sliding groove 42 is provided in the receiving cavity 41. Two through holes 43 are provided on the main body 4 along the length direction of the sliding groove 42, respectively communicating with the sliding groove 42. The sliding groove 42 is provided with a flow path that can be extended along the sliding groove 42. A movable plate 44 moves along the length of the slide groove 42, and a first driving assembly 5 is provided in the accommodating cavity 41, which is pulsatorically connected to the movable plate 44. The first driving assembly 5 is used to drive the movable plate 44 to reciprocate along the length of the slide groove 42 within the slide groove 42. Two through holes 45 are spaced apart on the movable plate 44 along the length of the slide groove 42. When the first driving assembly 5 drives the movable plate 44 to move to a position where one of the through holes 45 is aligned with one of the through holes 43, the other through hole 45 is misaligned with the other through hole 43. The cavity 41 is also provided with two guide sleeves 46, and the two guide sleeves 46 are respectively attached to the side of the movable plate 44 away from the through hole 43. The guide sleeves 46 are respectively provided with guide holes 47, and the guide holes 47 are aligned with the through holes 43 one by one. It also includes an air extraction pipe 21 and a suction pipe 31. One end of the air extraction pipe 21 is connected to one of the guide holes 47, and the other end passes through the main body 4 and is connected to the air extraction pump 2. One end of the suction pipe 31 extends into the other guide hole 47 and can move within the guide sleeve 46, and the other end passes through the cover 11 and is connected to the suction pump 3. The first driving component 5 drives the moving plate to move within the slide groove 42, which controls the connection between the suction pipe 21 and the corresponding through hole 43, while simultaneously isolating the suction pipe 31 from the corresponding through hole 43, or the connection between the suction pipe 31 and the corresponding through hole 43, while simultaneously isolating the suction pipe 21 from the corresponding through hole 43. This allows the suction pipe 31 to be closed when the suction pipe 21 collects exhaust gas discharged from the fixed bed, preventing exhaust gas from entering the suction pipe 31. At the same time, the suction pipe 21 is closed when the suction pipe 31 draws catalyst from the fixed bed to prevent catalyst loss.
[0024] Specifically, the operation steps for using the catalyst suction device for pentachloropyridine production provided in this embodiment to extract the catalyst from the fixed bed are as follows: First, move the movable frame 1 above the fixed bed, then activate the first drive assembly 5 to drive the movable plate 44 within the slide groove 42 to a position where the guide hole 47, the through hole 45, and the corresponding through hole 43 accommodating the suction pipe 21 are sequentially connected. At this time, the guide hole 47 and the corresponding through hole 43 accommodating the suction pipe 31 are blocked by the movable plate 44. Then, activate the suction pump 2 to extract the gas, and then remove the end cover of the fixed bed. At this time, the tail gas leaking from the fixed bed... Gas is drawn into the suction pipe 21. After the exhaust gas is absorbed, the first driving component 5 drives the movable plate 44 to move to a position where the guide hole 47, the through hole 45, and the corresponding through hole 43 of the suction pipe 31 are sequentially connected. At this time, the guide hole 47 and the corresponding through hole 43 of the suction pipe 21 are blocked by the movable plate 44. The suction pipe 31 is moved to insert into the corresponding position of the fixed bed, and the suction pump 3 is started to suction out the catalyst in the fixed bed along the suction pipe 31. After the catalyst in the fixed bed is sucked out, a new catalyst is put in to complete the catalyst replacement. The catalyst suction device for pentachloropyridine production provided in this embodiment can effectively prevent the leakage of harmful exhaust gas in the fixed bed during the catalyst replacement process and protect the personal safety of the operator. It is also simple to operate and easy to use.
[0025] like Figure 2 As shown, the main body 4 is provided with multiple connecting seats 48 spaced apart around the opening of the accommodating cavity 41. Each connecting seat 48 is provided with a rotatable pressing block 49. The pressing block 49 abuts against the side of the cover 11 away from the main body 4 and presses the cover 11 tightly onto the main body 4. After the cover 11 is placed on the main body 4 and covers the opening of the accommodating cavity 41, rotating the pressing block 49 so that it abuts against the cover 11 will press the cover 11 tightly onto the main body 4, keeping the cover 11 in a closed position to ensure a secure fit between the main body 4 and the cover 11. This also facilitates the removal of the cover 11 to inspect and maintain the components inside the accommodating cavity 41.
[0026] like Figure 2 and Figure 3As shown, the first driving assembly 5 includes a first cylinder 51 and a first piston rod 52 disposed at the output end of the first cylinder 51. The first cylinder 51 drives the first piston rod 52 to reciprocate along the length direction of the slide groove 42, and one end of the first piston rod 52 is fixedly connected to the movable plate 44. By driving the first piston rod 52 to extend or retract, the first cylinder 51 can drive the movable plate 44 to move within the slide groove 42, thereby adjusting the position of the movable plate 44 and controlling the connection between the guide hole 47 and the corresponding through hole 43, making the catalyst suction device for pentachloropyridine production easy to operate.
[0027] In this embodiment, a guide tube 12 is provided on the side of the cover 11 near the receiving cavity 41. The guide tube 12 wraps around the suction tube 31 and communicates with the guide hole 47 that receives the suction tube 31. The guide tube 12 is used to guide the suction tube 31 to move within the receiving cavity 41 and to keep the suction tube 31 aligned with the corresponding guide hole 47. This allows the suction tube 31 to stably pass through the guide hole 47, the through hole 45, and the through hole 43 in sequence and extend into the fixed bed. At the same time, it avoids the difficulty in aligning the suction tube 31 with the guide hole 47 after it is pulled out of the fixed bed and detached from the guide sleeve 46. This helps to improve the reliability of the catalyst suction device for pentachloropyridine production.
[0028] Please combine Figure 1 and Figure 2 The main body 4 is also provided with a cover 6, which includes a first annular plate 61, a flexible cover 62, and a second annular plate 63 connected in sequence. The first annular plate 61 is fixedly connected to the main body 4, and the through hole 43 communicates with the space enclosed by the flexible cover 62. By setting the cover 6 on the main body 4 to cover the end of the fixed bed after the end cap is removed, the exhaust gas leaking from the fixed bed is prevented from spreading to the surrounding environment. The first annular plate 61 in the cover 6 is fixedly connected to the main body 4. After moving the main body 4 above the fixed bed, the second annular plate 63 is moved closer to the fixed bed below, so that the flexible cover 62 covers the fixed bed, which is convenient to use.
[0029] In detail, the main body 4 is also provided with a second driving assembly 7 that is pulsatorically connected to the second annular plate 63. The second driving assembly 7 drives the second annular plate 63 to move vertically up and down and move closer to or away from the first annular plate 61. The second driving assembly 7 is used to drive the second annular plate 63 to move vertically and adjust the distance between the first annular plate 61 and the second annular plate 63. When the second annular plate 63 moves away from the first annular plate 61, the second annular plate 63 moves closer to the fixed bed located below the main body 4 so that the flexible cover 62 can be placed over the end of the fixed bed. When the second annular plate 63 moves closer to the first annular plate 61, the flexible cover 62 can be retracted so that the pentachloropyridine production catalyst suction device can be moved to the next fixed bed for operation after the catalyst replacement is completed.
[0030] Please refer to Figure 2 and Figure 4 The second drive assembly 7 includes a second cylinder 71 and a second piston rod 72 disposed at the output end of the second cylinder 71. The second cylinder 71 drives the second piston rod 72 to reciprocate vertically, and one end of the second piston rod 72 is fixedly connected to the second annular plate 63. The second piston rod 72 is extended or retracted by the second cylinder 71, thereby moving the second annular plate 63. When the second piston rod 72 extends from the second cylinder 71, the second annular plate 63 descends vertically, and when the second piston rod 72 retracts from the second cylinder 71, the second annular plate 63 rises vertically, facilitating precise adjustment of the position of the second annular plate 63 and ensuring that the flexible cover 62 covers the end of the fixed bed.
[0031] like Figure 1 As shown, a handle is provided on one side of the movable frame 1, and the handle is spaced apart from the main body 4. The handle on the movable frame 1 is used to pull the movable frame 1 to move it on the ground, thereby facilitating the transport of the catalyst suction device for pentachloropyridine production and moving the catalyst suction device for pentachloropyridine production above the fixed bed for convenient use.
[0032] Please refer to Figure 1 The catalyst suction device for pentachloropyridine production also includes a tail gas treatment component 8, which is connected to the suction pump 2. The tail gas treatment component 8 is used to treat the tail gas collected by the suction pump 2 to render it harmless, treating it to meet environmental protection standards before releasing it to avoid tail gas leakage and pollution. The tail gas treatment component 8 can be made using existing equipment such as adsorption towers and scrubbing towers.
[0033] In this embodiment, the catalyst suction device for pentachloropyridine production further includes a collection tank 9, which is located between the main body 4 and the suction pump 3 and is connected to the suction pipe 31. The suction pump 3 draws the catalyst from the fixed bed into the collection tank 9 along the suction pipe 31, so as to collect the catalyst taken out from the fixed bed in one place for further processing later.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A catalyst suction device for pentachloropyridine production, comprising a movable frame, a vacuum pump, and a suction pump, characterized in that: The movable frame includes a main body and a cover. The main body has a receiving cavity, and the cover covers the opening of the receiving cavity. A sliding groove is provided inside the receiving cavity. Two through holes, each communicating with the sliding groove, are spaced apart along the length of the sliding groove on the main body. A movable plate, which can move along the length of the sliding groove, is provided inside the sliding groove. A first drive assembly, which is connected to the movable plate, is provided inside the receiving cavity. Two through holes are spaced apart along the length of the sliding groove on the movable plate. When the first drive assembly drives the movable plate to a position where one of the through holes aligns with one of the through holes, the other through hole is misaligned with the other through hole. Two guide sleeves are also provided inside the receiving cavity, and the two guide sleeves are respectively attached to the side of the movable plate away from the through holes. Each guide sleeve has a guide hole, and the guide hole aligns with the through hole. The frame also includes an air extraction pipe and a suction pipe. One end of the air extraction pipe is connected to one of the guide holes, and the other end passes through the main body and is connected to an air extraction pump. One end of the suction pipe extends into the other guide hole and can move inside the guide sleeve, and the other end passes through the cover and is connected to a suction pump.
2. The catalyst suction device for pentachloropyridine production as described in claim 1, characterized in that: The main body is provided with a plurality of connecting seats spaced apart around the opening of the accommodating cavity. Each connecting seat is provided with a rotatable pressing block. The pressing block abuts against the side of the cover away from the main body and presses the cover tightly onto the main body.
3. The catalyst suction device for pentachloropyridine production as described in claim 1, characterized in that: The first drive assembly includes a first cylinder and a first piston rod disposed at the output end of the first cylinder. The first cylinder drives the first piston rod to reciprocate along the length direction of the slide groove, and one end of the first piston rod is fixedly connected to the movable plate.
4. The catalyst suction device for pentachloropyridine production as described in claim 1, characterized in that: The cover is provided with a guide tube on the side near the accommodating cavity. The guide tube wraps around the suction tube and communicates with the guide hole that accommodates the suction tube.
5. The catalyst suction device for pentachloropyridine production as described in claim 1, characterized in that: The main body is also provided with a cover, which includes a first annular plate, a flexible cover and a second annular plate connected in sequence. The first annular plate is fixedly connected to the main body and the through hole communicates with the space enclosed by the flexible cover.
6. The catalyst suction device for pentachloropyridine production as described in claim 5, characterized in that: The main body is also provided with a second driving component that is connected to the second annular plate in a transmission manner. The second driving component drives the second annular plate to move up and down in the vertical direction and move closer to or away from the first annular plate.
7. The catalyst suction device for pentachloropyridine production as described in claim 6, characterized in that: The second drive assembly includes a second cylinder and a second piston rod disposed at the output end of the second cylinder. The second cylinder drives the second piston rod to reciprocate in a vertical direction, and one end of the second piston rod is fixedly connected to the second annular plate.
8. The catalyst suction device for pentachloropyridine production as described in claim 1, characterized in that: The movable frame has a handle on one side, and the handle is spaced apart from the main body.
9. The catalyst suction device for pentachloropyridine production as described in claim 1, characterized in that: It also includes an exhaust gas treatment component, which is connected to the exhaust pump.
10. The catalyst suction device for pentachloropyridine production as described in claim 1, characterized in that: It also includes a collection tank, which is located between the main body and the suction pump and is connected to the suction pipe.