Vacuum impregnation device for catalyst

Abstract

The utility model relates to the technical field of catalyst preparation, in particular to a catalyst vacuum impregnation device. The catalyst vacuum impregnation device comprises an impregnation module and an impregnation liquid injection module, the impregnation module comprises a driving unit and a spherical impregnation tank body, the driving unit is connected with the impregnation tank body and used for driving the impregnation tank body to rotate, and the impregnation liquid injection module comprises an impregnation liquid preparation unit and an impregnation liquid spraying unit. The impregnation liquid spraying unit is arranged in the impregnation tank body and covers an in-tank space at the lower half part of the impregnation tank body, and the impregnation liquid preparation unit is positioned outside the impregnation tank body, is connected with the impregnation liquid spraying unit and is used for providing impregnation liquid for the impregnation liquid spraying unit. According to the utility model, uniform spraying can be carried out so as to ensure that a carrier can be fully impregnated, and the carrier is in dynamic contact with the impregnation liquid by driving the impregnation tank body to rotate, so that non-uniform impregnation caused by standing and impregnation liquid deposition in a spraying and impregnation stage and a catalyst drying process can be avoided, and the impregnation efficiency of a catalyst is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of catalyst preparation, in particular to a catalyst vacuum impregnation device. Background Art

[0002] Catalyst impregnation is a crucial step in the preparation of finished catalysts. Its principle is to evenly disperse the catalytically active components (including promoters) on the surface and within the pores of a porous support through impregnation, resulting in a finished catalyst with high activity, selectivity, and metal dispersion. Compared to conventional impregnation methods, vacuum impregnation further removes gases and moisture adsorbed within the porous material, facilitating the entry and uniform dispersion of the active components into the pores.

[0003] While the vacuum impregnation process is mature in industrial catalyst production, a cost-effective, easy-to-use vacuum impregnation system suitable for laboratory development remains a technological gap. Existing catalyst vacuum impregnation systems often operate in a static state, which can lead to inadequate impregnation and uneven distribution of active components. Low carrier water absorption can lead to streaks in the finished catalyst due to uneven impregnation and impregnation solution sedimentation. Furthermore, cleaning the inner walls of the tank after impregnation is time-consuming and labor-intensive. Utility Model Content

[0004] The utility model aims to provide a catalyst vacuum impregnation device to solve the problem of uneven carrier impregnation caused by static impregnation, uneven spraying and impregnation liquid deposition in the catalyst vacuum impregnation device in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a catalyst vacuum impregnation device, comprising:

[0007] An impregnation module, comprising a drive unit and a spherical impregnation tank body, wherein the drive unit is connected to the impregnation tank body and is used to drive the impregnation tank body to rotate, and the impregnation tank body is provided with a carrier feed port and a top cover for blocking the carrier feed port;

[0008] An immersion liquid injection module includes an immersion liquid preparation unit and an immersion liquid spraying unit. The immersion liquid spraying unit is arranged in the immersion tank body and covers the tank space in the lower half of the immersion tank body. The immersion liquid preparation unit is located outside the immersion tank body and connected to the immersion liquid spraying unit to provide immersion liquid to the immersion liquid spraying unit.

[0009] Optionally, the catalyst vacuum impregnation device also includes a support module, which includes two support seats arranged opposite to each other, and the impregnation tank body is located between the two support seats. The drive unit includes a first drive motor and a rotating shaft, and the rotating shaft is located on both sides of the impregnation tank body, and one end of the rotating shaft is rotatably connected to the support seat, and the other end of the rotating shaft is connected to the outer wall of the impregnation tank body. The first drive motor is arranged on the support seat, and the output end of the first drive motor is correspondingly connected to one of the rotating shafts.

[0010] Optionally, the immersion liquid spraying unit includes a spray pipe and a plurality of spray heads arranged on the spray pipe, the spray pipe is transversely arranged in the middle of the immersion tank body, and the length of the spray pipe is greater than the radius of the cross section of the middle of the immersion tank body.

[0011] Optionally, the impregnation liquid preparation unit includes a preparation tank body and an impregnation liquid delivery pipeline, the preparation tank body is located above the impregnation tank body, and the preparation tank body is provided with an impregnation liquid feed port, one end of the impregnation liquid delivery pipeline is connected to the preparation tank body, and the other end of the impregnation liquid delivery pipeline is connected to the spray pipe.

[0012] Optionally, a stirring assembly is provided on the preparation tank body, and the stirring assembly includes a second drive motor and a stirring paddle. The second drive motor is arranged on the top of the preparation tank body, the stirring paddle is arranged inside the preparation tank body, and the output end of the second drive motor is connected to the stirring paddle.

[0013] Optionally, the catalyst vacuum impregnation device also includes a cleaning module, which includes a third drive motor, an arc-shaped scraper affixed to the bottom of the impregnation tank body, and a scraper bar arranged on the arc-shaped scraper, the two ends of the arc-shaped scraper are rotatably connected to the inner wall of the impregnation tank body, the third drive motor is arranged on the outer wall of the impregnation tank body, and the output end of the third drive motor is connected to one end of the arc-shaped scraper, and the scraper bar is located on the affixed surface of the arc-shaped scraper.

[0014] Optionally, a drain trough is provided below the immersion tank body, a discharge port corresponding to the drain trough and a bottom cover for sealing the discharge port are provided at the bottom of the immersion tank body, a first drain line is also led out from the immersion liquid delivery pipeline, one end of the first drain line and the immersion liquid delivery pipeline are connected through a three-way valve, and the other end of the first drain line extends into the drain trough, a second drain line is provided at the bottom of the drain trough, and a drain valve is provided on the second drain line.

[0015] Optionally, the catalyst vacuum impregnation device also includes a heating and drying oven, the impregnation module is arranged in the heating and drying oven, and multiple groups of the impregnation modules are arranged in the heating and drying oven, the impregnation tanks of each group of the impregnation modules have different sizes, each group of the impregnation modules has a one-to-one corresponding impregnation liquid injection module, and the impregnation liquid preparation unit is located outside the heating and drying oven.

[0016] Optionally, the catalyst vacuum impregnation device also includes a vacuum module, which includes a vacuum pump, a vacuum pipeline connecting the vacuum pump and the impregnation tank body, and a shut-off valve is provided on the vacuum pipeline, wherein the vacuum pipeline is respectively connected to the impregnation tank body of each group of the impregnation modules.

[0017] Optionally, the catalyst vacuum impregnation device further includes a control cabinet, which is electrically connected to the driving unit, the impregnation liquid preparation unit, and the impregnation liquid spraying unit respectively.

[0018] Compared with the prior art, the catalyst vacuum impregnation device provided by the embodiment of the present invention has the following beneficial effects:

[0019] By providing an impregnation module and an impregnation liquid injection module, and utilizing an impregnation liquid spray unit to cover the interior space of the lower half of the impregnation tank, the impregnation liquid from the impregnation liquid preparation unit is evenly sprayed onto the carrier within the impregnation tank via the impregnation liquid spray unit, ensuring that the carrier is fully impregnated. Furthermore, a drive unit is utilized to rotate the impregnation tank, allowing the carrier to dynamically contact the impregnation liquid during the impregnation and drying processes under negative pressure. This prevents uneven impregnation caused by static impregnation liquid sedimentation during the spraying and catalyst drying stages, further improving catalyst impregnation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0021] Figure 1 This is a schematic diagram of the overall structure of the catalyst vacuum impregnation device provided in an embodiment of the present utility model.

[0022] The symbols in the accompanying drawings represent the following:

[0023] 1. Impregnation module; 11. Impregnation tank body; 111. Top cover; 112. Bottom cover; 12. First drive motor; 13. Rotating shaft; 2. Impregnation liquid injection module; 21. Impregnation liquid preparation unit; 211. Preparation tank body; 212. Impregnation liquid delivery pipeline; 213. Second drive motor; 214. Stirring paddle; 22. Impregnation liquid spraying unit; 3. Support base; 4. Cleaning module; 41. Third drive motor; 42. Arc scraper; 5. Drain trough; 51. Second drain pipeline; 52. Drain valve; 6. First drain pipeline; 7. Three-way valve; 8. Heating and drying oven; 9. Vacuum pump; 91. Vacuum pipeline; 92. Shut-off valve. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. Now, in conjunction with the accompanying drawings, a detailed description of the preferred embodiments of the present utility model will be given.

[0025] The utility model discloses a catalyst vacuum impregnation device, such as Figure 1 As shown, it includes an impregnation module 1 and an impregnation liquid injection module 2. The impregnation module 1 includes a driving unit and a spherical impregnation tank body 11. The driving unit is connected to the impregnation tank body 11 and is used to drive the impregnation tank body 11 to rotate. The impregnation tank body 11 is provided with a carrier feed port and a top cover 111 for sealing the carrier feed port. The impregnation liquid injection module 2 includes an impregnation liquid preparation unit 21 and an impregnation liquid spraying unit 22. The impregnation liquid spraying unit 22 is arranged in the impregnation tank body 11 and covers the tank space in the lower half of the impregnation tank body 11. The impregnation liquid preparation unit 21 is located outside the impregnation tank body 11 and is connected to the impregnation liquid spraying unit 22, and is used to provide impregnation liquid to the impregnation liquid spraying unit 22.

[0026] By implementing the above-mentioned catalyst vacuum impregnation device, the top cover 111 can be opened, and the carrier to be impregnated can be placed into the impregnation tank body 11 along the carrier feed port, and then the top cover 111 can be closed. The impregnation liquid spraying unit 22 is used to cover the tank space in the lower half of the impregnation tank body 11, so that the impregnation liquid in the impregnation liquid preparation unit 21 can be sprayed evenly when it is sprayed onto the carrier in the impregnation tank body 11 through the impregnation liquid spraying unit 22, thereby ensuring that the carrier in the impregnation tank body 11 is fully impregnated. At the same time, the driving unit is used to drive the impregnation tank body 11 to rotate, so that the carrier can dynamically contact the impregnation liquid during impregnation, which can avoid uneven impregnation caused by standing still and impregnation liquid sedimentation during the spraying stage and catalyst drying process, and further improve the catalyst impregnation efficiency.

[0027] Furthermore, the catalyst vacuum impregnation apparatus also includes a support module. The support module comprises two opposing support bases 3, with the impregnation tank 11 positioned between the two support bases 3. A drive unit comprises a first drive motor 12 and a rotating shaft 13. The rotating shaft 13 is positioned on either side of the impregnation tank 11, with one end of the rotating shaft 13 rotatably connected to the support base 3 and the other end of the rotating shaft 13 connected to the outer wall of the impregnation tank 11. The first drive motor 12 is mounted on the support base 3, with the output end of the first drive motor 12 correspondingly connected to one of the rotating shafts 13.

[0028] Through the implementation of the above-mentioned catalyst vacuum impregnation device, the impregnation tank body 11 and the support base 3 are connected by two opposing support bases 3 via the rotating shafts 13 on both sides of the impregnation tank body 11 to provide stable support for the impregnation tank body 11 and ensure that the impregnation tank body 11 remains stable during rotation. Therefore, the first drive motor 12 and the rotating shaft 13 are provided to cooperate to drive the impregnation tank body 11 to rotate. The first drive motor 12 is used to control the impregnation tank body 11 to rotate to a certain extent according to demand through the forward and reverse rotation of the first drive motor 12, so as to shake and flip the carrier and impregnation liquid in the impregnation tank body 11, so that the carrier in the impregnation tank body 11 can be fully impregnated, thereby facilitating the uniform dispersion of the active metal and improving the impregnation effect.

[0029] Furthermore, the immersion liquid spraying unit 22 includes a spray pipe and a plurality of nozzles arranged on the spray pipe. The spray pipe is transversely arranged in the middle of the immersion tank body 11, and the length of the spray pipe is greater than the radius of the cross section of the middle of the immersion tank body 11.

[0030] Through the implementation of the above-mentioned catalyst vacuum impregnation apparatus, the impregnation liquid can be evenly sprayed inside the impregnation tank 11 using a spray pipe and multiple nozzles disposed transversely in the middle of the impregnation tank 11, ensuring that the carrier is fully contacted with the impregnation liquid and effectively improving the uniformity of the impregnation effect. Furthermore, because the impregnation tank 11 is spherical, the length of the spray pipe is greater than the radius of the cross-section of the middle portion of the impregnation tank 11, allowing the multiple nozzles on the spray pipe to cover the entire bottom area of ​​the impregnation tank 11, reducing impregnation dead angles. As a result, when the carrier is injected into the impregnation tank 11 through the carrier feed port and collects at the bottom of the impregnation tank 11, the injected carrier can be fully impregnated, thereby improving the uniformity of the impregnation effect.

[0031] Furthermore, the impregnation liquid preparation unit 21 includes a preparation tank 211 and an impregnation liquid delivery pipeline 212. The preparation tank 211 is located above the impregnation tank 11 and is provided with an impregnation liquid feed port. One end of the impregnation liquid delivery pipeline 212 is connected to the preparation tank 211, and the other end of the impregnation liquid delivery pipeline 212 is connected to the spray pipe.

[0032] Through the implementation of the above-described catalyst vacuum impregnation apparatus, the preparation tank 211 is used to mix and prepare the impregnation liquid components, allowing for precise control of the impregnation liquid formulation according to specific process requirements. The prepared impregnation liquid is then transported from the preparation tank 211 to the spray pipe via the impregnation liquid delivery pipeline 212, ensuring that the impregnation liquid is accurately sprayed into the interior of the impregnation tank 11. By positioning the preparation tank 211 above the impregnation tank 11, gravity allows the impregnation liquid to flow naturally toward the spray pipe, eliminating the need for additional pumping equipment and effectively reducing energy consumption and costs.

[0033] Furthermore, a stirring assembly is provided on the preparation tank 211. The stirring assembly includes a second drive motor 213 and a stirring paddle 214. The second drive motor 213 is provided on the top of the preparation tank 211, and the stirring paddle 214 is provided inside the preparation tank 211, with the output end of the second drive motor 213 connected to the stirring paddle 214.

[0034] Through the implementation of the above-described catalyst vacuum impregnation apparatus, active component metal salts, additives, solvents, etc. can preferably be added to the preparation tank 211 through the impregnation liquid feed port. The second drive motor 213 drives the rotation of the stirring paddle 214 to fully mix the impregnation liquid components injected into the preparation tank 211, thereby ensuring a uniform concentration of the impregnation liquid in the preparation tank 211. After the carrier to be impregnated is added to the impregnation tank 11 through the carrier feed port, the top cover 111 is closed to seal the impregnation tank 11, and the first drive motor 12 then drives the impregnation tank 11 to rotate.

[0035] Furthermore, the catalyst vacuum impregnation apparatus also includes a cleaning module 4. This cleaning module 4 comprises a third drive motor 41, a curved scraper 42 that engages the bottom of the impregnation tank 11, and a scraping strip mounted on the curved scraper 42. Both ends of the curved scraper 42 are rotatably connected to the inner wall of the impregnation tank 11. The third drive motor 41 is mounted on the outer wall of the impregnation tank 11, and the output end of the third drive motor 41 is connected to one end of the curved scraper 42. The scraping strip is located on the engaging surface of the curved scraper 42.

[0036] Through the implementation of the above-mentioned catalyst vacuum impregnation device, the curved scraper 42 is attached to the bottom of the impregnation tank body 11, and the curved scraper 42 is driven by the third drive motor 41 to rotate along the inner wall of the impregnation tank body 11, so that the scraping strips of the curved scraper 42 can effectively scrape off the carrier and impregnation liquid residue attached to the inner wall of the impregnation tank body 11, thereby cleaning the impregnation tank body 11 after impregnation is completed. Preferably, after impregnation is completed, the bottom cover 112 can be opened to unload the carrier. Water is injected into the impregnation tank body 11 through the preparation tank body 211 and the impregnation liquid delivery pipeline 212, and the curved scraper 42 and scraping strips driven by the third drive motor 41 are used to automatically clean the inner wall of the impregnation tank body 11, which can effectively improve cleaning efficiency.

[0037] Furthermore, a drain trough 5 is provided below the impregnation tank 11. The bottom of the impregnation tank 11 is provided with a discharge port corresponding to the drain trough 5, as well as a bottom cover 112 that blocks the discharge port. A first drain line 6 extends from the impregnation liquid delivery pipeline 212. One end of the first drain line 6 is connected to the impregnation liquid delivery pipeline 212 via a three-way valve 7, and the other end of the first drain line 6 extends into the drain trough 5. A second drain line 51 is provided at the bottom of the drain trough 5, and a drain valve 52 is installed on the second drain line 51.

[0038] Through the implementation of the above-mentioned catalyst vacuum impregnation apparatus, by providing a drain trough 5 below the impregnation tank 11, after impregnation is completed, the bottom cover 112 can be opened, allowing the wastewater generated during the cleaning process within the impregnation tank 11 to flow directly into the drain trough 5 through the discharge port. Combined with the provision of a first drain line 6, wastewater can be discharged simultaneously from the first drain line 6 and the discharge port at the bottom of the impregnation tank 11, thereby preventing pipeline blockage and achieving the purpose of rapid wastewater discharge. At the same time, the provision of a three-way valve 7 allows for flexible control of the flow direction of the impregnation liquid, allowing it to freely switch between impregnation and wastewater discharge. Finally, the wastewater is centrally treated through a second drain line 51 at the bottom of the drain trough 5.

[0039] Furthermore, the catalyst vacuum impregnation apparatus also includes a heating and drying oven 8. The impregnation modules 1 are disposed within the heating and drying oven 8. Multiple groups of these modules 1 are housed within the heating and drying oven 8, each group of modules 1 having an impregnation tank 11 of varying sizes. Each group of modules 1 is associated with an impregnation liquid injection module 2, and an impregnation liquid preparation unit 21 is located outside the heating and drying oven 8.

[0040] Through the implementation of the above-described catalyst vacuum impregnation apparatus, multiple impregnation processes can be performed simultaneously by utilizing multiple impregnation modules 1. Furthermore, by providing impregnation tanks 11 of varying sizes, the impregnation requirements of carriers of varying specifications can be met, thereby improving the apparatus's versatility and impregnation efficiency. Furthermore, the heating and drying oven 8 can provide suitable temperature conditions. After the spray impregnation is completed, the impregnation liquid delivery line 212 is closed, and the heating system of the heating and drying oven 8 is activated, allowing the impregnation tank 11 to rotate and dry the catalyst. The internal working conditions of the tank can be observed through a pre-set visual window in the impregnation tank 11. Furthermore, by locating the impregnation liquid preparation unit 21 outside the heating and drying oven 8, the properties of the impregnation liquid can be prevented from being affected by the high temperature within the heating and drying oven 8.

[0041] Furthermore, the catalyst vacuum impregnation apparatus further includes a vacuum module. The vacuum module comprises a vacuum pump 9, a vacuum line 91 connecting the vacuum pump 9 and the impregnation tank 11, and a shut-off valve 92 provided on the vacuum line 91. The vacuum line 91 is connected to the impregnation tank 11 of each impregnation module group 1.

[0042] Furthermore, the catalyst vacuum impregnation device also includes a control cabinet, which is electrically connected to the driving unit, the impregnation liquid preparation unit, and the impregnation liquid spraying unit.

[0043] By implementing the above-described catalyst vacuum impregnation apparatus, the impregnation tank 11 is evacuated using the vacuum pump 9, thereby removing gas and moisture from the carrier pores. The interior of the impregnation tank 11 is then evacuated to a certain vacuum level, allowing the active components to enter the pores under negative pressure and be evenly dispersed, thereby ensuring the quality of the impregnation. Furthermore, by providing a shut-off valve 92, the location and number of impregnation tanks 11 used, as well as the duration of the vacuuming, can be controlled, thereby improving efficiency and flexibility during production. Specifically, the vacuum pump 9 is first turned on through the control cabinet. After the impregnation tank 11 is evacuated to a certain vacuum level, the vacuum pump 9 is turned off, and the impregnation liquid delivery line 212 is opened, allowing the impregnation liquid in the preparation tank 211 to be delivered under negative pressure to the spray pipe inside the impregnation tank 11 and evenly sprayed onto the carrier.

[0044] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art may modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A catalyst vacuum impregnation device, characterized in that: The catalyst vacuum impregnation device comprises: An impregnation module, comprising a drive unit and a spherical impregnation tank body, wherein the drive unit is connected to the impregnation tank body and is used to drive the impregnation tank body to rotate, and the impregnation tank body is provided with a carrier feed port and a top cover for blocking the carrier feed port; An immersion liquid injection module includes an immersion liquid preparation unit and an immersion liquid spraying unit. The immersion liquid spraying unit is arranged in the immersion tank body and covers the tank space in the lower half of the immersion tank body. The immersion liquid preparation unit is located outside the immersion tank body and connected to the immersion liquid spraying unit to provide immersion liquid to the immersion liquid spraying unit.

2. The catalyst vacuum impregnation device according to claim 1, characterized in that: The catalyst vacuum impregnation device also includes a support module, which includes two support seats arranged opposite to each other, and the impregnation tank body is located between the two support seats. The drive unit includes a first drive motor and a rotating shaft, and the rotating shaft is located on both sides of the impregnation tank body, and one end of the rotating shaft is rotatably connected to the support seat, and the other end of the rotating shaft is connected to the outer wall of the impregnation tank body. The first drive motor is arranged on the support seat, and the output end of the first drive motor is correspondingly connected to one of the rotating shafts.

3. The catalyst vacuum impregnation device according to claim 2, characterized in that: The immersion liquid spraying unit includes a spray pipe and a plurality of spray heads arranged on the spray pipe. The spray pipe is transversely arranged in the middle of the immersion tank body, and the length of the spray pipe is greater than the radius of the cross section of the middle of the immersion tank body.

4. The catalyst vacuum impregnation device according to claim 3, characterized in that: The impregnation liquid preparation unit includes a preparation tank body and an impregnation liquid delivery pipeline. The preparation tank body is located above the impregnation tank body, and an impregnation liquid feed port is provided on the preparation tank body. One end of the impregnation liquid delivery pipeline is connected to the preparation tank body, and the other end of the impregnation liquid delivery pipeline is connected to the spray pipe.

5. The catalyst vacuum impregnation device according to claim 4, characterized in that: The preparation tank body is provided with a stirring assembly, which includes a second drive motor and a stirring paddle. The second drive motor is arranged on the top of the preparation tank body, the stirring paddle is arranged in the preparation tank body, and the output end of the second drive motor is connected to the stirring paddle.

6. The catalyst vacuum impregnation device according to claim 4, characterized in that: The catalyst vacuum impregnation device also includes a cleaning module, which includes a third drive motor, an arc-shaped scraper affixed to the bottom of the impregnation tank body, and a scraper bar arranged on the arc-shaped scraper. The two ends of the arc-shaped scraper are rotatably connected to the inner wall of the impregnation tank body. The third drive motor is arranged on the outer wall of the impregnation tank body, and the output end of the third drive motor is connected to one end of the arc-shaped scraper. The scraper bar is located on the affixed surface of the arc-shaped scraper.

7. The catalyst vacuum impregnation device according to claim 4, characterized in that: A drain trough is provided below the immersion tank body, a discharge port corresponding to the drain trough and a bottom cover for sealing the discharge port are provided at the bottom of the immersion tank body, a first drain line is also led out from the immersion liquid delivery pipeline, one end of the first drain line and the immersion liquid delivery pipeline are connected through a three-way valve, and the other end of the first drain line extends into the drain trough, a second drain line is provided at the bottom of the drain trough, and a drain valve is provided on the second drain line.

8. The catalyst vacuum impregnation device according to any one of claims 1 to 7, characterized in that: The catalyst vacuum impregnation device also includes a heating and drying oven, the impregnation module is arranged in the heating and drying oven, and multiple groups of the impregnation modules are arranged in the heating and drying oven, the impregnation tanks of each group of the impregnation modules have different sizes, each group of the impregnation modules has a one-to-one correspondence with the impregnation liquid injection module, and the impregnation liquid preparation unit is located outside the heating and drying oven.

9. The catalyst vacuum impregnation device according to claim 8, characterized in that: The catalyst vacuum impregnation device also includes a vacuum module, which includes a vacuum pump and a vacuum pipeline connecting the vacuum pump and the impregnation tank body. A shut-off valve is provided on the vacuum pipeline, wherein the vacuum pipeline is respectively connected to the impregnation tank body of each group of the impregnation modules.

10. The catalyst vacuum impregnation device according to claim 1, characterized in that: The catalyst vacuum impregnation device further includes a control cabinet, which is electrically connected to the driving unit, the impregnation liquid preparation unit, and the impregnation liquid spraying unit respectively.

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