Dust removal device for catalyst powder batching and mixing

Abstract

This application relates to the field of dust removal equipment technology, specifically disclosing a dust removal device for catalyst powder batching and mixing, including a mixer and an installation platform. The mixer is fixedly installed on one side of the installation platform, and four sets of telescopic rods are spaced apart on the installation platform. The telescopic ends of the four sets of telescopic rods are hinged to a vibrating screen plate, and the four sets of telescopic rods are respectively hinged to the four corners of the vibrating screen plate. A feed pipe is provided at the upper end of the mixer, and the end of the vibrating screen plate near the mixer is located directly above the feed pipe. A vibrating screen assembly and a collection assembly are provided on the installation platform. The catalyst raw material is added to the vibrating screen plate. The vibrating screen assembly in this application can make the vibrating screen plate rise and fall along the telescopic direction of the telescopic rods, thereby realizing the vibration and screening of the catalyst raw material and reducing the dust generated during mixing. The collection assembly on the installation platform can collect the dust screened out, reducing the dust escape rate. The catalyst raw material after vibration and dust removal can be added to the mixer through the feed pipe for mixing.

Description

Technical Field

[0001] This application relates to the field of dust removal equipment technology, and in particular to a dust removal device for mixing catalyst powder. Background Technology

[0002] Catalyst powder batching refers to the process of physically mixing active components, carrier materials, and additives in precise proportions. Catalyst powder batching is widely used in petroleum refining catalytic cracking, environmental denitrification catalysts, and fine chemical synthesis. During the mixing process, due to the large differences in particle size, high surface energy, and easy charging of powders, a large amount of dust is generated. This dust not only causes the loss of precious metals and inaccurate proportions, but also endangers personnel health, wears down equipment, and may even cause dust explosions.

[0003] In existing technologies, dust removal devices typically consist of three main parts: a dust collection unit, a conveying unit, and a filtration unit. The dust collection unit includes a dust collection hood fixed above the feed inlet of the batching mixer and a telescopic dust collection hopper at the discharge outlet, both connected to a metal ventilation duct via flanges. The conveying unit uses a high-pressure centrifugal fan to generate negative pressure, drawing the dust-laden airflow through a corrugated pipe to the filtration unit. The filtration unit is based on a cartridge dust collector, with multiple layers of filter media inside to intercept dust. The bottom is connected to a dust collection box, and all structures are connected in series via airtight pipes. The dust captured by the dust collection hood is pressurized and conveyed by the fan, enters the cartridge dust collector for filtration, and the clean air is discharged. The collected dust falls into a recycling box for use in production.

[0004] Regarding the aforementioned technologies, since the catalyst raw materials themselves carry a large amount of dust, the dust will separate from the catalyst raw materials during mixing in the mixer, which may generate a large amount of dust. Furthermore, the dust may escape from the feed inlet and affect the external environment, as well as endanger personnel health and wear out equipment. Therefore, improvements are needed. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a dust removal device for mixing catalyst powder.

[0006] The dust removal device for catalyst powder batching and mixing provided in this application adopts the following technical solution:

[0007] A dust removal device for mixing catalyst powder includes a mixer and a mounting platform. The mixer is fixedly installed on one side of the mounting platform. Four sets of telescopic rods are spaced apart on the mounting platform. The telescopic ends of the four sets of telescopic rods are hinged to a vibrating screen plate, and the four sets of telescopic rods are hinged to the four corners of the vibrating screen plate. A feed pipe is provided at the upper end of the mixer. The end of the vibrating screen plate near the mixer is located directly above the feed pipe. The mounting platform is provided with a vibrating screen assembly for vibrating and screening the catalyst raw materials and a collection assembly for collecting the dust screened out.

[0008] By adopting the above technical solution, the catalyst raw material is added to the vibrating screen plate through the feed pipe. The vibrating screen assembly in this application can make the vibrating screen plate rise and fall along the extension and retraction direction of the telescopic rod, thereby realizing the screening of dust carried by the catalyst raw material, reducing the dust content of the catalyst raw material, and thus reducing the dust generated during mixing. The collection assembly can collect the dust screened out, reducing the dust escape rate. The catalyst raw material after dust removal by the vibrating screen can be added to the mixer through the feed pipe for mixing.

[0009] Optionally, the vibrating screen assembly includes a drive motor, a cam, a lifting frame, a housing, and an opening / closing component. The drive motor is fixedly mounted on the mounting platform, the cam is fixedly connected to the output end of the drive motor, the lifting frame is fixedly connected to the side wall of the vibrating screen plate, the cam is rotatably mounted inside the lifting frame, the housing covers the vibrating screen plate, one end is fixedly connected to the mounting platform, and the other end is welded to the feed pipe. Four sets of telescopic rods are arranged through the bottom wall of the housing, the output end of the drive motor is arranged through the side wall of the housing, and the opening / closing component is arranged on the feed pipe and is used to open and close the feed pipe.

[0010] By adopting the above technical solution, the drive motor is started, and the output end of the drive motor drives the cam to rotate. The rotation of the cam can cause the lifting frame to rise and fall, and the rising and falling of the lifting frame can drive the vibrating screen plate to rise and fall, thereby realizing the dust removal of the catalyst raw materials by vibrating screen, reducing the dust content of the catalyst raw materials, thereby reducing the dust generated during mixing in the mixer, improving the service life of the mixer, reducing maintenance costs, and the shell can intercept the dust screened out, reducing the possibility of dust escaping to the outside of the shell.

[0011] Optionally, the opening and closing component includes a sealing plate and an electric telescopic rod. A moving groove is provided on the feed pipe. The sealing plate is horizontally inserted into the moving groove. The electric telescopic rod is fixedly installed on the mixer. The sealing plate is fixedly connected to the telescopic end of the electric telescopic rod.

[0012] By adopting the above technical solution, after the catalyst raw materials are added, the electric telescopic rod is activated. The telescopic end of the electric telescopic rod can drive the sealing plate to move in the moving groove, thereby sealing the feed pipe and preventing the dust generated by the mixer during mixing from escaping into the external environment, thus reducing the impact of dust on the external environment.

[0013] Optionally, the collection assembly includes a negative pressure fan, a dust collector, a first suction pipe, a first valve, a centrifugal fan, and an exhaust pipe. The negative pressure fan and the dust collector are both located on one side of the mixer, and the exhaust end of the dust collector is connected to the intake end of the negative pressure fan. One end of the first suction pipe is connected to the upper end of the housing, and the other end is connected to the intake end of the dust collector. The first valve is located on the first suction pipe. The centrifugal fan is located on one side of the mixer. One end of the exhaust pipe is connected to the lower end of the housing, and the other end is connected to the exhaust end of the centrifugal fan.

[0014] By adopting the above technical solution, when the negative pressure fan is started, since the air outlet of the dust collector is connected to the air inlet of the negative pressure fan, and one end of the first suction pipe is connected to the upper end of the shell and the other end is connected to the air inlet of the dust collector, the negative pressure fan can suck the dust screened out into the dust collector through the first suction pipe, thereby achieving the collection of the screened dust and reducing the dust escape rate. At the same time as starting the negative pressure fan, the centrifugal fan is started. The centrifugal fan can blow high-speed airflow to the bottom of the vibrating screen plate through the air outlet pipe, thereby blowing the screened dust to the upper end of the shell and collecting it by the first suction pipe, thereby improving the dust collection efficiency and preventing dust from falling to the bottom of the shell and causing secondary pollution. In addition, the first valve can adjust the first suction pipe according to the working conditions.

[0015] Optionally, a second suction pipe is provided on the side wall of the mixer, the end of the second suction pipe away from the mixer is connected to the air inlet of the dust collector, and a second valve is provided on the second suction pipe.

[0016] By adopting the above technical solution, when the mixer is mixing the catalyst raw materials, the first valve is closed and the second valve is opened. The dust generated during mixing can be captured by the negative pressure fan, dust collector and second suction pipe, thereby realizing the capture of dust generated during mixing, reducing dust and lowering cleaning costs.

[0017] Optionally, a dust collection hood is provided at the end of the first suction pipe.

[0018] By adopting the above technical solutions, the dust collection hood can intercept the dust screened out by the vibrating screen, reduce the dust escape rate, and reduce the possibility of dust settling inside the shell.

[0019] Optionally, a guide shell is provided at the end of the air outlet pipe.

[0020] By adopting the above technical solution, the guide shell can control the airflow direction and directly blow the dust screened out into the dust collection hood, thereby preventing the dust from escaping from both ends of the shell and improving the dust removal efficiency.

[0021] Optionally, a sealing strip is provided on the outer peripheral wall of the sealing plate.

[0022] By adopting the above technical solutions, the sealing strip can increase the sealing performance of the sealing plate, thereby reducing the impact of dust on the external environment and reducing cleaning costs.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The vibrating screen assembly in this application can vibrate and screen the catalyst raw materials to remove dust. When the drive motor is started, the output end of the drive motor drives the cam to rotate. The rotation of the cam can cause the lifting frame to rise and fall. The rising and falling of the lifting frame can drive the vibrating screen plate to rise and fall, thereby realizing the vibration and screening of the catalyst raw materials to remove dust, reducing the dust content of the catalyst raw materials, thereby reducing the dust generated during mixing in the mixer, improving the service life of the mixer, and reducing maintenance costs;

[0025] 2. The dust collection component in this application can collect the dust screened out. When the negative pressure fan is started, since the air outlet of the dust collector is connected to the air inlet of the negative pressure fan, and one end of the first suction pipe is connected to the upper end of the shell and the other end is connected to the air inlet of the dust collector, the negative pressure fan can suck the dust screened out into the dust collector through the first suction pipe, thereby collecting the dust screened out and reducing the dust escape rate. At the same time as starting the negative pressure fan, the centrifugal fan is started. The centrifugal fan can blow high-speed airflow to the bottom of the vibrating screen plate through the air outlet pipe, thereby blowing the dust screened out to the upper end of the shell and collecting it by the first suction pipe, thereby improving the dust collection efficiency and preventing the dust from falling to the bottom of the shell and causing secondary pollution.

[0026] 3. The second suction pipe, negative pressure fan, and dust collector in this application can capture the dust generated inside the mixer. When the mixer is mixing the catalyst raw materials, the first valve is closed and the second valve is opened. The dust generated during mixing can be captured by the negative pressure fan, dust collector, and second suction pipe, thereby achieving the capture of dust generated during mixing in the mixer, reducing dust and lowering cleaning costs. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0029] Figure 2 This is another schematic diagram of the overall structure;

[0030] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0031] Figure 4 This is a partial structural diagram;

[0032] Figure 5 yes Figure 3 An enlarged schematic diagram of part A in the middle.

[0033] Reference numerals: 1. Mounting platform; 11. Mixer; 12. Telescopic rod; 13. Vibrating screen plate; 14. Feed pipe; 2. Vibrating screen assembly; 21. Drive motor; 22. Cam; 23. Lifting frame; 24. Housing; 3. Opening and closing parts; 31. Sealing plate; 32. Electric telescopic rod; 33. Moving trough; 4. Collection assembly; 41. Negative pressure fan; 42. Dust collector; 43. First suction pipe; 431. Dust collection hood; 44. First valve; 45. Centrifugal fan; 46. Air outlet pipe; 461. Guide shell; 5. Second suction pipe; 51. Second valve; 6. Sealing strip. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0035] This application discloses a dust removal device for mixing catalyst powder, referring to... Figure 1 , Figure 2 and Figure 3 The dust removal device for catalyst powder batching and mixing includes a mixer 11 and a mounting platform 1. The mixer 11 is fixedly installed on one side of the mounting platform 1. Four sets of telescopic rods 12 are fixedly installed at intervals on the mounting platform 1. The telescopic ends of the four sets of telescopic rods 12 are hinged to a vibrating screen plate 13, and the four sets of telescopic rods 12 are hinged to the four corners of the vibrating screen plate 13. A feed pipe 14 is fixedly installed at the upper end of the mixer 11. The end of the vibrating screen plate 13 near the mixer 11 is located directly above the feed pipe 14. A vibrating screen assembly 2 and a collection assembly 4 are installed on the mounting platform 1.

[0036] The catalyst raw material is added to the vibrating screen plate 13 through the feed pipe 14. In this embodiment, the vibrating screen assembly 2 can make the vibrating screen plate 13 move up and down along the extension and retraction direction of the telescopic rod 12, thereby vibrating and screening the dust carried by the catalyst raw material, reducing the dust content of the catalyst raw material, and thus reducing the dust generated during mixing. The collection assembly 4 can collect the dust screened out, reducing the dust escape rate. The catalyst raw material after dust removal by vibrating and screening can be added to the mixer 11 through the feed pipe 14 for mixing.

[0037] Reference Figure 1 and Figure 4The catalyst raw material may contain a large amount of dust. Before adding the catalyst raw material to the mixer 11, it is necessary to perform dust removal by vibrating screen. Therefore, the vibrating screen assembly 2 in this embodiment includes a drive motor 21, a cam 22, a lifting frame 23, a housing 24 and an opening and closing component 3. The drive motor 21 is bolted to the mounting platform 1. The cam 22 is fixedly connected to the output end of the drive motor 21. The lifting frame 23 is welded to the side wall of the vibrating screen plate 13. The cam 22 is rotatably installed inside the lifting frame 23. The housing 24 is covered on the vibrating screen plate 13, and one end is fixedly connected to the mounting platform 1, and the other end is welded to the feed pipe 14. Four sets of telescopic rods 12 are installed through the bottom wall of the housing 24. The output end of the drive motor 21 is installed through the side wall of the housing 24. The opening and closing component 3 is installed on the feed pipe 14.

[0038] When the drive motor 21 is started, the output end of the drive motor 21 rotates and drives the cam 22 to rotate. The rotation of the cam 22 causes the lifting frame 23 to rise and fall. The rising and falling of the lifting frame 23 drives the vibrating screen plate 13 to rise and fall, thereby realizing the dust removal of the catalyst raw material by vibrating screen, reducing the dust content of the catalyst raw material, thereby reducing the dust generated during mixing in the mixer 11, improving the service life of the mixer 11, and reducing maintenance costs. The housing 24 can intercept the dust screened out, reducing the possibility of dust escaping to the outside of the housing 24.

[0039] Reference Figure 1 and Figure 5 In this embodiment, the opening and closing component 3 can prevent the dust generated by the mixer 11 during mixing from escaping into the external environment. It includes a sealing plate 31 and an electric telescopic rod 32. A moving groove 33 is provided on the feed pipe 14. The sealing plate 31 is horizontally inserted and installed in the moving groove 33. The electric telescopic rod 32 is bolted to the mixer 11. The sealing plate 31 and the telescopic end of the electric telescopic rod 32 are fixedly connected.

[0040] After the catalyst raw materials are added, the electric telescopic rod 32 is activated. The telescopic end of the electric telescopic rod 32 can drive the sealing plate 31 to move within the moving groove 33, thereby sealing the feed pipe 14 and preventing the dust generated by the mixer 11 during mixing from escaping into the external environment, thus reducing the impact of dust on the external environment. In this embodiment, the discharge port of the mixer 11 is also equipped with an opening and closing part 3 to prevent dust from escaping to the outside at the discharge port.

[0041] Reference Figure 1 , Figure 2 and Figure 3To collect the dust sifted out by the vibrating screen, the collection component 4 in this embodiment includes a negative pressure fan 41, a dust collector 42, a first suction pipe 43, a first valve 44, a centrifugal fan 45, and an exhaust pipe 46. The negative pressure fan 41 and the dust collector 42 are both fixedly installed on one side of the mixer 11, and the exhaust end of the dust collector 42 is connected to the intake end of the negative pressure fan 41. One end of the first suction pipe 43 is connected to the upper end of the housing 24, and the other end is connected to the intake end of the dust collector 42. The first valve 44 is fixedly installed on the first suction pipe 43. The centrifugal fan 45 is fixedly installed on one side of the mixer 11. One end of the exhaust pipe 46 is connected to the lower end of the housing 24, and the other end is connected to the exhaust end of the centrifugal fan 45.

[0042] When the negative pressure fan 41 is started, since the air outlet of the dust collector 42 is connected to the air inlet of the negative pressure fan 41, and one end of the first suction pipe 43 is connected to the upper end of the housing 24 and the other end is connected to the air inlet of the dust collector 42, the negative pressure fan 41 can suck the dust screened out into the dust collector 42 through the first suction pipe 43, thereby capturing the dust screened out and reducing the dust escape rate. At the same time as starting the negative pressure fan 41, the centrifugal fan 45 is started. The centrifugal fan 45 blows high-speed airflow to the bottom of the vibrating screen plate 13 through the air outlet pipe 46, thereby blowing the dust screened out to the upper end of the housing 24 and capturing it by the first suction pipe 43, thereby improving the dust capture efficiency and preventing the dust from falling to the bottom of the housing 24 and causing secondary pollution. In addition, the first valve 44 can adjust the first suction pipe 43 according to the working conditions.

[0043] In this embodiment, the first suction pipe 43 is provided with multiple sets of branch suction pipes near the end of the housing 24. The multiple sets of branch suction pipes can increase the dust collection coverage area and collection efficiency. In this embodiment, the exhaust pipe 46 is provided with multiple sets of branch air pipes near the end of the housing 24. The multiple sets of branch air pipes can improve the dust blowing effect and reduce the dust scattering at both ends of the housing 24.

[0044] Reference Figure 2 When the mixer 11 mixes the catalyst raw materials, dust may be generated. Therefore, in this embodiment, a second dust suction pipe 5 is welded to the side wall of the mixer 11. The end of the second dust suction pipe 5 away from the mixer 11 is connected to the air inlet of the dust collector 42. A second valve 51 is fixedly installed on the second dust suction pipe 5.

[0045] When the mixer 11 mixes the catalyst raw materials, the first valve 44 is closed and the second valve 51 is opened. The dust generated during mixing can be captured by the negative pressure fan 41, the dust collector 42 and the second suction pipe 5, thereby reducing dust and lowering cleaning costs.

[0046] Reference Figure 3In order to intercept the dust sieved out by the vibrating screen, the end of the first dust suction pipe 43 in this embodiment is fixedly connected to a dust collection hood 431. The dust collection hood 431 can also reduce the dust escape rate and reduce the possibility of dust settling in the shell 24. In this embodiment, multiple sets of dust collection hoods 431 are provided, and multiple sets of dust collection hoods 431 can improve the dust collection effect.

[0047] Reference Figure 4 The high-speed airflow in the exhaust pipe 46 may blow away the dust. Therefore, in this embodiment, the end of the exhaust pipe 46 is fixedly installed with a guide shell 461. The guide shell 461 can accurately control the airflow direction and directly blow the dust screened out into the dust collection hood 431, thereby preventing the dust from escaping from both ends of the housing 24 and improving the dust removal efficiency. In this embodiment, multiple sets of guide shells 461 are provided. Multiple sets of guide shells 461 can make the airflow evenly distributed and reduce the blind spots of airflow coverage.

[0048] Reference Figure 5 To prevent dust from escaping into the air during feeding, mixing and unloading, a sealing strip 6 is fixedly installed on the outer peripheral wall of the sealing plate 31 in this embodiment, thereby reducing the impact of dust on the external environment and reducing cleaning costs. The sealing strip 6 in this embodiment is made of silicone rubber, which is a preferred material in this embodiment, but it can also be made of materials such as neoprene rubber.

[0049] The implementation principle of a dust removal device for catalyst powder batching and mixing in this application embodiment is as follows:

[0050] Start the drive motor 21. The output end of the drive motor 21 drives the cam 22 to rotate. The rotation of the cam 22 causes the lifting frame 23 to rise and fall. The rise and fall of the lifting frame 23 drives the vibrating screen plate 13 to rise and fall, thereby realizing the vibration and dust removal of the catalyst raw materials, reducing the dust content of the catalyst raw materials, thereby reducing the dust generated during mixing in the mixer 11, improving the service life of the mixer 11, and reducing maintenance costs.

[0051] When the negative pressure fan 41 is started, since the outlet of the dust collector 42 is connected to the inlet of the negative pressure fan 41, and one end of the first suction pipe 43 is connected to the upper end of the housing 24 and the other end is connected to the inlet of the dust collector 42, the negative pressure fan 41 can suck the dust screened out into the dust collector 42 through the first suction pipe 43, thereby capturing the dust screened out and reducing the dust escape rate. At the same time as starting the negative pressure fan 41, the centrifugal fan 45 is started. The centrifugal fan 45 can blow high-speed airflow to the bottom of the vibrating screen plate 13 through the outlet pipe 46, thereby blowing the dust screened out to the upper end of the housing 24 and capturing it by the first suction pipe 43, thereby improving the dust capture efficiency and preventing the dust from falling to the bottom of the housing 24 and causing secondary pollution.

[0052] When the mixer 11 mixes the catalyst raw materials, the first valve 44 is closed and the second valve 51 is opened. The dust generated during mixing can be captured by the negative pressure fan 41, the dust collector 42 and the second suction pipe 5, thereby reducing dust and lowering cleaning costs.

[0053] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0054] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dust removal device for mixing catalyst powder, characterized in that: The assembly includes a mixer (11) and a mounting platform (1). The mixer (11) is fixedly installed on one side of the mounting platform (1). Four sets of telescopic rods (12) are spaced apart on the mounting platform (1). The ends of the four sets of telescopic rods (12) are fixedly connected to a vibrating screen plate (13), and the telescopic ends of the four sets of telescopic rods (12) are hinged to the four corners of the vibrating screen plate (13). A feed pipe (14) is provided at the upper end of the mixer (11). The end of the vibrating screen plate (13) near the mixer (11) is located directly above the feed pipe (14). The mounting platform (1) is provided with a vibrating screen assembly (2) for vibrating screen dust removal of catalyst raw materials and a collection assembly (4) for collecting the dust discharged from the vibrating screen.

2. The dust removal device for catalyst powder batching and mixing according to claim 1, characterized in that: The vibrating screen assembly (2) includes a drive motor (21), a cam (22), a lifting frame (23), a housing (24), and an opening / closing component (3). The drive motor (21) is fixedly installed on the mounting platform (1). The cam (22) is fixedly connected to the output end of the drive motor (21). The lifting frame (23) is fixedly connected to the side wall of the vibrating screen plate (13). The cam (22) is rotatably installed inside the lifting frame (23). The housing (24) covers the vibrating screen plate (13), and one end is fixedly connected to the mounting platform (1), while the other end is welded to the feed pipe (14). Four sets of telescopic rods (12) are set through the bottom wall of the housing (24). The output end of the drive motor (21) is set through the side wall of the housing (24). The opening / closing component (3) is set on the feed pipe (14) and is used to open and close the feed pipe (14).

3. The dust removal device for catalyst powder batching and mixing according to claim 2, characterized in that: The opening and closing component (3) includes a sealing plate (31) and an electric telescopic rod (32). A moving groove (33) is provided on the feed pipe (14). The sealing plate (31) is horizontally inserted into the moving groove (33). The electric telescopic rod (32) is fixedly installed on the mixer (11). The sealing plate (31) is fixedly connected to the telescopic end of the electric telescopic rod (32).

4. The dust removal device for catalyst powder batching and mixing according to claim 2, characterized in that: The collection assembly (4) includes a negative pressure fan (41), a dust collector (42), a first suction pipe (43), a first valve (44), a centrifugal fan (45), and an exhaust pipe (46). The negative pressure fan (41) and the dust collector (42) are both located on one side of the mixer (11), and the exhaust end of the dust collector (42) is connected to the intake end of the negative pressure fan (41). One end of the first suction pipe (43) is connected to the upper end of the housing (24), and the other end is connected to the intake end of the dust collector (42). The first valve (44) is located on the first suction pipe (43). The centrifugal fan (45) is located on one side of the mixer (11). One end of the exhaust pipe (46) is connected to the lower end of the housing (24), and the other end is connected to the exhaust end of the centrifugal fan (45).

5. A dust removal device for mixing catalyst powder according to claim 4, characterized in that: A second suction pipe (5) is provided on the side wall of the mixer (11). The end of the second suction pipe (5) away from the mixer (11) is connected to the air inlet of the dust collector (42). A second valve (51) is provided on the second suction pipe (5).

6. The dust removal device for catalyst powder batching and mixing according to claim 4, characterized in that: The end of the first suction pipe (43) is provided with a dust collection hood (431).

7. A dust removal device for mixing catalyst powder according to claim 4, characterized in that: The end of the air outlet pipe (46) is provided with a guide shell (461).

8. A dust removal device for mixing catalyst powder according to claim 3, characterized in that: A sealing strip (6) is provided on the outer peripheral wall of the sealing plate (31).

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