A mixing device for a selective catalytic converter fluid generator

Abstract

This invention relates to the field of mixing equipment technology, and in particular to a mixing device for a selective catalyst fluid generator, comprising: a mixing cylinder having a mixing chamber, an air outlet channel formed on the right end face of the mixing cylinder, and an air inlet channel formed on the left end face of the mixing cylinder; a scraper fixed on a first feed pipe, and mixing blades installed on a second feed pipe; and a purification mechanism for removing impurities from the fluid. The purification mechanism is arranged in the air outlet channel. The rotation of the second feed pipe drives the spirally arranged mixing blades to generate a strong stirring effect. The spiral arrangement not only increases the flow path of the fluid in the mixing cylinder, but also promotes the exchange and mixing between different fluid layers. The L-shaped scraper can scrape the inner wall of the mixing cylinder, effectively preventing the fluid from depositing or scaling during the mixing process. Through the design of the purification mechanism, impurities in the fluid can be removed, improving the cleanliness of the reaction product.

Description

Technical Field

[0001] This invention relates to the field of mixing equipment technology, and in particular to a mixing device for a selective catalyst fluid generator. Background Technology

[0002] Selective catalytic reduction (SCR) is a device that uses a reducing agent (such as ammonia or urea) to selectively react with NOx in exhaust gas in the presence of a catalyst, producing nitrogen (N2) and water (H2O). This process aims to reduce the NOx content in engine or industrial emissions to meet environmental regulations.

[0003] A common problem in existing mixing units is the formation of crystals between the waste gas and the reducing agent solution during the reduction reaction due to improper temperature control or changes in other operating conditions. These crystals deposit inside pipes, valves, pumps, or other equipment, gradually accumulating and severely clogging fluid channels, thus hindering normal fluid flow. This not only increases resistance to fluid transmission but can also directly lead to equipment failure, affecting the continuity and stability of the entire production process. Furthermore, the formation of crystals significantly reduces the efficiency of the reduction reaction. They occupy a large amount of reaction space, reducing the effective reaction area and decreasing the contact opportunities between reactants, thereby lowering the rate and efficiency of the reduction reaction. More seriously, the crystals may encapsulate part of the reducing agent or catalyst, forming an isolation layer that prevents these key components from directly contacting the reactant gas, further weakening their catalytic effect and significantly reducing the reduction reaction efficiency. Therefore, improvements and optimizations are needed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the problem that in the prior art, crystals deposit inside pipes, valves, pumps or other equipment, which gradually accumulate and seriously block the fluid channels, thereby hindering the normal flow of fluid, not only increasing the resistance of fluid transmission, but also potentially causing equipment failure, affecting the continuity and stability of the entire production process, a mixing device for a selective catalyst fluid generator is provided.

[0005] The technical solution adopted by this invention to solve its technical problem is: a mixing device for a selective catalytic converter fluid generator, comprising:

[0006] A mixing cylinder has a mixing chamber, an air outlet channel is formed on the right end face of the mixing cylinder, and an air inlet channel is formed on the left end face of the mixing cylinder;

[0007] The first feed pipe extends into the mixing cylinder. The first feed pipe and the mixing cylinder are arranged coaxially. Several first through holes are spaced apart along the axial direction on the first feed pipe. A scraper is fixed on the first feed pipe. The scraper is located in the mixing chamber of the mixing cylinder and contacts the inner wall of the mixing chamber of the mixing cylinder.

[0008] The second material pipe extends into the mixing cylinder and is sleeved on the first material pipe. The second material pipe has second through holes spaced apart along its axial direction. The plane on which the first through hole rotates has a corresponding second through hole. When the first through hole and the second through hole are connected, the cavity of the first material pipe and the mixing cavity of the mixing cylinder are connected. The second material pipe is equipped with mixing blades.

[0009] The drive assembly provides power for the rotation of the scraper and mixing blades. The output end of the drive assembly is connected to the first and second feed pipes. The drive assembly can drive the first and second feed pipes to rotate at different speeds.

[0010] The device also includes a purification mechanism to remove impurities from the fluid. Located within the air outlet duct, the purification mechanism utilizes the rotation of the second feed pipe to drive a strong stirring effect through spirally arranged mixing blades. This spiral arrangement not only increases the flow path of the fluid within the mixing cylinder but also promotes exchange and mixing between different fluid layers, significantly improving mixing efficiency. The rotation of the spiral mixing blades helps create vortices within the mixing cylinder, which further accelerate the mixing process, resulting in a more uniform distribution of the fluid components and improved mixing uniformity and efficiency. As the first feed pipe rotates, an L-shaped scraper scrapes the inner wall of the mixing cylinder, effectively preventing sedimentation or scaling during mixing. This design not only reduces the cleaning workload of the mixing cylinder but also extends the service life of the mixing device. Compared to traditional fluid mixing devices, this device offers significant advantages in mixing efficiency, process stability, and cleaning maintenance. Traditional devices may suffer from uneven mixing, scaling, and cleaning difficulties, while this device effectively solves these problems through innovative structural design and functional configuration, improving the overall performance and reliability of the mixing device.

[0011] The purification mechanism is designed to remove impurities from the fluid and improve the cleanliness of the reaction products.

[0012] Furthermore, the mixed leaves are distributed in a spiral pattern.

[0013] The device further includes a drive assembly comprising a motor, a first bevel gear, a second bevel gear, and a third bevel gear. The output shaft of the motor is connected to the third bevel gear. The first bevel gear is mounted on a first feed pipe, the second bevel gear is mounted on a second feed pipe, and the third bevel gear meshes with the first and second bevel gears.

[0014] Furthermore, the transmission ratios of the first and third bevel gears are not equal to those of the second and third bevel gears.

[0015] The purification mechanism further includes a powered fan blade, a transmission assembly, and a filter plate. The powered fan blade and the air outlet duct are rotatably connected, the filter plate and the air outlet duct are rotatably connected, the filter plate and the air outlet duct are coaxially arranged, the input end of the powered fan blade and the transmission assembly are drivenly connected, the output end of the transmission assembly and the filter plate are drivenly connected, and the powered fan blade is used to receive the wind power to drive the filter plate to rotate around its circumference.

[0016] The purification mechanism further includes a scraper, which is fixedly connected to the air outlet duct, and the scraper is attached to the end face of the filter plate near the input end of the air outlet duct.

[0017] The purification mechanism further includes a fixed block located within the air outlet duct and fixedly connected to the air outlet duct, a filter plate fixedly connected to the fixed block, and the filter plate located between the fixed block and the scraper strip.

[0018] The transmission assembly further includes a first rotating shaft, a second rotating shaft, a fourth bevel gear, a fifth bevel gear, a mounting base, a transmission belt, and a transmission gear. The first rotating shaft is rotatably connected to the air outlet duct, and the power fan blade is fixedly connected to the first rotating shaft. One end of the first rotating shaft extends to the outside of the air outlet duct and a fourth bevel gear is arranged thereon. The fourth bevel gear and the fifth bevel gear mesh. The second rotating shaft is rotatably connected to the mounting base, and the fifth bevel gear is arranged on the second rotating shaft. The outer periphery of the filter plate has teeth, and the transmission gear meshes with the teeth on the filter plate. The transmission gear is rotatably connected to the mounting base via the rotating shaft, and the transmission belt wraps around the rotating shaft of the second rotating shaft and the transmission gear.

[0019] The purification mechanism further includes a collection box for accommodating impurities filtered by the filter plate, the collection box being fixedly connected to the air outlet duct, the opening of the collection box being located between the filter plate and the power fan blade, and the opening of the collection box being connected to the air outlet duct.

[0020] Further features include a temperature controller installed on the air intake duct.

[0021] Further, the mixing drum is provided with a collection channel, and a plug is arranged in the collection channel.

[0022] The beneficial effects of the present invention are as follows: The mixing device for a selective catalyst fluid generator provided by the present invention generates a strong stirring effect by rotating the second feed pipe and driving the spirally arranged mixing blades. The spiral arrangement not only increases the flow path of the fluid in the mixing cylinder, but also promotes the exchange and mixing between different fluid layers, thereby significantly improving the mixing efficiency. The rotation of the spiral mixing blades helps to form vortices in the mixing cylinder. The vortices can further accelerate the mixing process of the fluid, making the components in the fluid more evenly distributed, improving the uniformity and efficiency of mixing. With the rotation of the first feed pipe;

[0023] The L-shaped scraper can scrape the inner wall of the mixing cylinder, effectively preventing the fluid from depositing or scaling during the mixing process. This design not only reduces the cleaning workload of the mixing cylinder, but also extends the service life of the mixing device. Compared with traditional fluid mixing devices, this device has significant advantages in mixing efficiency, process stability, and cleaning and maintenance. Traditional devices may have problems such as uneven mixing, easy scaling, and difficult cleaning, while this device effectively solves these problems through innovative structural design and functional configuration, improving the overall performance and reliability of the mixing device.

[0024] The purification mechanism is designed to remove impurities from the fluid and improve the cleanliness of the reaction products. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0028] Figure 3 This is a cross-sectional view of the air outlet channel of the present invention;

[0029] Figure 4 This is a schematic diagram of the purification mechanism of the present invention;

[0030] Figure 5 This is a partial structural diagram of the air inlet channel of the present invention;

[0031] Figure 6 This is a schematic diagram of the exploded structure at the first and second feed tubes of the present invention;

[0032] Figure 7 This is the present invention. Figure 6 A magnified structural diagram of point A in the middle.

[0033] In the diagram: 1. Mixing cylinder, 11. Mixing chamber, 12. Air outlet, 13. Air inlet, 131. Temperature controller, 14. Collection channel, 15. Plug;

[0034] 2. First feed pipe; 21. First through hole; 22. Scraper;

[0035] 3. Second feed pipe; 31. Second through hole; 32. Mixing blade;

[0036] 4. Drive components; 41. Motor; 42. First bevel gear; 43. Second bevel gear; 44. Third bevel gear;

[0037] 5. Purification mechanism; 51. Power fan blade; 52. Transmission assembly; 521. First rotating shaft; 522. Second rotating shaft; 523. Fourth bevel gear; 524. Fifth bevel gear; 525. Mounting base; 526. Transmission belt; 527. Transmission gear; 53. Filter plate; 54. Scraper bar; 55. Fixing block; 56. Collection box. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0039] like Figure 1 This is a schematic diagram of the structure of the present invention, a mixing device for a selective catalytic converter fluid generator, comprising:

[0040] A mixing cylinder 1 has a mixing chamber 11. An air outlet channel 12 is formed on the right end face of the mixing cylinder 1, and an air inlet channel 13 is formed on the left end face. A temperature controller 131 is installed on the air inlet channel 13. The air inlet channel 13 is connected to the interior of the mixing cylinder 1, ensuring that external gas can smoothly enter the mixing cylinder to provide the necessary reactants or carrier gas for the catalytic reaction. The temperature controller 131 is fixedly sleeved on the outer wall of the air inlet channel 13. The function of the temperature controller 131 is to control the temperature of the gas entering the mixing cylinder, ensuring that the gas is within the optimal reaction temperature range when it reaches the catalytic reaction zone. By precisely controlling the inlet gas temperature, the conditions of the catalytic reaction can be optimized, improving reaction efficiency and product quality. A flange ring is provided at one end of the air inlet channel 13 near the temperature controller 131, enabling a tight connection between the air inlet channel 13 and other pipes or equipment, and ensuring the sealing of the connection.

[0041] The mixing cylinder 1 is provided with a collection channel 14, and a plug 15 is arranged in the collection channel. By setting the channel plug 15, the user can control the retention or removal of crystals as needed.

[0042] The first feed pipe 2 extends into the mixing cylinder 1. The first feed pipe 2 and the mixing cylinder 1 are arranged coaxially. Several first through holes 21 are spaced apart along the axial direction on the first feed pipe 2. A scraper 22 is fixed on the first feed pipe 2. The scraper 22 is located in the mixing chamber 11 of the mixing cylinder 1. The scraper 22 is L-shaped and contacts the inner wall of the mixing chamber 11 of the mixing cylinder 1. The L-shaped scraper 22 can scrape the inner wall of the mixing cylinder, effectively preventing the fluid from depositing or scaling during the mixing process. This design not only reduces the cleaning workload of the mixing cylinder, but also extends the service life of the mixing device. Compared with traditional fluid mixing devices, this device has significant advantages in mixing efficiency, process stability and cleaning and maintenance. Traditional devices may have problems such as uneven mixing, easy scaling and difficult cleaning. This device effectively solves these problems through innovative structural design and functional configuration, and improves the overall performance and reliability of the mixing device.

[0043] The second feed pipe 3 extends into the mixing cylinder 1 and is sleeved on the first feed pipe 2. The second feed pipe 3 has second through holes 31 spaced apart along its axial direction. The plane on which the first through hole 21 rotates has a corresponding second through hole 31. When the first through hole 21 and the second through hole 31 are connected, the cavity of the first feed pipe 2 and the mixing cavity 11 of the mixing cylinder 1 are connected. The second feed pipe 3 is equipped with mixing blades 32, which are spirally distributed. The rotation of the second feed pipe 3 drives the spirally arranged mixing blades 32 to produce a strong stirring effect. The spiral arrangement not only increases the flow path of the fluid in the mixing cylinder, but also promotes the exchange and mixing between different fluid layers, thereby significantly improving the mixing efficiency. The rotation of the spiral mixing blades 32 helps to form vortices in the mixing cylinder. The vortices can further accelerate the mixing process of the fluid, making the components in the fluid more evenly distributed, improving the uniformity and efficiency of the mixing. With the rotation of the first feed pipe;

[0044] When the first through hole 21 and the second through hole 31 do not overlap, the pressure inside the first feed pipe 2 increases. After the first through hole 21 and the second through hole 31 overlap, the gas is ejected from the first through hole 21 and the second through hole 31, increasing the ejection speed. This increases the diffusion of the reaction gas in the mixing cylinder 1, making the fluid distribution in the mixing cylinder more extensive and uniform. This helps to accelerate the mixing process of the fluid, improve the mixing efficiency, and thus shorten the time of the catalytic reaction.

[0045] The dimensions of the first through hole 21 and the second through hole 31 are equal.

[0046] The drive assembly 4 provides power for the rotation of the scraper 22 and the mixing blade 32. The output end of the drive assembly 4 is connected to the first material pipe 2 and the second material pipe 3. The drive assembly 4 can drive the first material pipe 2 and the second material pipe 3 to rotate at different speeds, so that the first through hole 21 and the second through hole 31 can overlap in space. The drive assembly 4 includes a motor 41, a first bevel gear 42, a second bevel gear 43 and a third bevel gear 44. The output shaft of the motor 41 is connected to the third bevel gear 44. The first bevel gear 42 is mounted on the first material pipe 2, the second bevel gear 43 is mounted on the second material pipe 3, and the third bevel gear 44 meshes with the first bevel gear 42 and the second bevel gear 43.

[0047] With motor 41 as the power source, the third bevel gear 44 on its output shaft transmits power to the first bevel gear 42 and the second bevel gear 43 through precise meshing, ensuring high efficiency of power transmission and reducing energy loss. This allows the first feed tube 2 and the second feed tube 3 to rotate at higher speeds and with stable power, thereby improving mixing efficiency.

[0048] The transmission ratio of the first bevel gear 42 and the third bevel gear 44 is not equal to the transmission ratio of the second bevel gear 43 and the third bevel gear 44. In the embodiment, the transmission ratio of the first bevel gear 42 and the third bevel gear 44 is 1, and the transmission ratio of the second bevel gear 43 and the third bevel gear 44 is 1.5.

[0049] And a purification mechanism 5, which is used to remove impurities in the fluid, is arranged in the air outlet duct 12.

[0050] The purification mechanism 5 includes a power fan blade 51, a transmission assembly 52, and a filter plate 53. The power fan blade 51 is rotatably connected to the air outlet duct 12, and the filter plate 53 is rotatably connected to the air outlet duct 12. The filter plate 53 and the air outlet duct 12 are arranged coaxially. The power fan blade 51 is driven to the input end of the transmission assembly 52, and the output end of the transmission assembly 52 is driven to the filter plate 53. The power fan blade 51 is used to receive the wind power to drive the filter plate 53 to rotate around its circumference. The power fan blade 51 has three fan bodies distributed at intervals.

[0051] When the gas after selective catalytic mixing reaction is discharged through the air outlet 12, this high-speed gas flow will generate a certain impact force on the power fan blade 51, thereby driving the power fan blade 51 to rotate, realizing energy recovery and utilization, and providing additional power support for the entire system.

[0052] The purification mechanism 5 includes a scraper 54, which is fixedly connected to the air outlet duct 12. The scraper 54 is attached to the end face of the filter plate 53 near the input end of the air outlet duct 12. The scraper 54 is used to scrape off the impurities filtered by the filter plate 53.

[0053] The purification mechanism 5 includes a fixing block 55, which is located inside the air outlet channel 12 and is fixedly connected to the air outlet channel 12. The filter plate 53 is fixedly connected to the fixing block 55 and is located between the fixing block 55 and the scraper 54. When fluid passes through the filter plate 53, the rotation action enhances the filtration effect, prevents clogging, and extends the service life of the filter plate 53. In order to further improve the filtration effect, the scraper 54 is tightly attached to the outer surface of the filter plate 53. During the rotation of the filter plate 53, the scraper 54 can scrape off the impurities and particles attached to the surface of the filter plate 53, thereby keeping the filter plate 53 clean and unobstructed.

[0054] The transmission assembly 52 includes a first rotating shaft 521, a second rotating shaft 522, a fourth bevel gear 523, a fifth bevel gear 524, a mounting base 525, a transmission belt 526, and a transmission gear 527. The first rotating shaft 521 is rotatably connected to the air outlet duct 12, and the power fan blade 51 is fixedly connected to the first rotating shaft 521. One end of the first rotating shaft 521 extends to the outside of the air outlet duct 12 and a fourth bevel gear 523 is arranged thereon. The fourth bevel gear 523 and the fifth bevel gear 524 mesh. The second rotating shaft 522 is rotatably connected to the mounting base 525, and the fifth bevel gear 524 is arranged on the second rotating shaft 522. The filter plate 53 has teeth on its outer periphery. The transmission gear 527 meshes with the teeth on the filter plate 53. The transmission gear 527 is rotatably connected to the mounting base 525 via a rotating shaft. The transmission belt 526 winds around the rotating shaft of the second rotating shaft and the transmission gear 527. The air outlet channel 12 has a slot for the transmission gear 527 to pass through. The slot matches the transmission gear 527. When the transmission gear 527 rotates, the transmission gear 527 and the slot of the air outlet channel 12 form a dynamic sealing state, and there is basically no leakage of reactive fluid. Furthermore, the slot can be covered by the mounting base 525 to prevent it from communicating with the outside.

[0055] The purification mechanism 5 includes a collection box 56 for accommodating impurities filtered by the filter plate 53. The collection box 56 is fixedly connected to the air outlet channel 12. The opening of the collection box 56 is located between the filter plate 53 and the power fan blade 51, and the opening of the collection box 56 is connected to the air outlet channel 12. Furthermore, the opening of the collection box 56 is located below the scraper 54.

[0056] Working principle: The gas to be treated enters the mixing cylinder 1 through the air inlet channel 13. Then, the pipe of the reducing agent urea aqueous solution is rotated and installed at one end of the first feed pipe 2. The temperature controller 131 on the air inlet channel 13 controls the temperature of the incoming gas to ensure that the gas is at the optimal reaction temperature when it reaches the catalytic reaction zone. Then, the motor 41 starts, and its output shaft drives the third bevel gear 44 to rotate. The third bevel gear 44 meshes with the first bevel gear 42 and the second bevel gear 43, respectively driving the first feed pipe 2 and the second feed pipe 3 to rotate. The L-shaped scraper 22 on the first feed pipe 2 rotates with it, scraping the inner wall of the mixing cylinder 1 to prevent crystal deposition or scaling. The spiral mixing blade 32 on the second feed pipe 3 rotates with it, generating a strong stirring effect and vortex, promoting uniform mixing of the fluid. The first through hole 21 and the second through hole 22 on the first feed pipe 2 and the second through hole 3 rotate with it. A reducing agent, urea aqueous solution, is sprayed through through-hole 31, generating an oxidation-reduction reaction. The gas after the reaction enters the air outlet channel 12 through the mixing cylinder 1. The gas is first filtered by the filter plate 53 in the air outlet channel 12 to further remove impurities and particulate matter. The high-speed flowing gas drives the power fan blade 51 to rotate. The exhaust fan 18 provides rotational power to the filter plate 25 through the transmission component 52. The scraper 54 rotates with the filter plate 53 to scrape off impurities on the surface of the filter plate 53, maintaining the filtration effect and further enhancing the filtration effect. It also prevents dust from adhering to the surface of the filter plate 53 and affecting the filtration effect. The crystals produced by the catalytic reaction pass through the collection channel 14 at the bottom of the mixing cylinder 1. The channel plug 15 at the bottom of the collection channel 14 can control the discharge of crystals as needed. The filtered gas is discharged from the top of the air outlet channel 12, completing the entire process.

[0057] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A mixing device for a selective catalytic converter fluid generator, characterized in that, include: A mixing cylinder (1) having a mixing chamber (11), an air outlet channel (12) is formed on the right end face of the mixing cylinder (1), and an air inlet channel (13) is formed on the left end face of the mixing cylinder (1); A first feed pipe (2) extends into a mixing cylinder (1). The first feed pipe (2) and the mixing cylinder (1) are arranged coaxially. A plurality of first through holes (21) are spaced apart along the axial direction on the first feed pipe (2). A scraper (22) is fixed on the first feed pipe (2). The scraper (22) is located in the mixing chamber (11) of the mixing cylinder (1), and the scraper (22) is in contact with the inner wall of the mixing chamber (11) of the mixing cylinder (1). The second material pipe (3) extends into the mixing cylinder (1) and is sleeved on the first material pipe (2). The second material pipe (3) has second through holes (31) spaced apart along its axial direction. The first through hole (21) has a corresponding second through hole (31) on the plane where it rotates. When the first through hole (21) and the second through hole (31) are connected, the cavity of the first material pipe (2) and the mixing cavity (11) of the mixing cylinder (1) are connected. The second material pipe (3) is equipped with mixing blades (32). A drive assembly (4) is used to provide power for the rotation of the scraper (22) and the mixing blade (32). The output end of the drive assembly (4) is connected to the first material pipe (2) and the second material pipe (3). The drive assembly (4) can drive the first material pipe (2) and the second material pipe (3) to rotate at different speeds. And a purification mechanism (5) for removing impurities from the fluid, the purification mechanism (5) being arranged in the air outlet duct (12).

2. The mixing device for a selective catalytic converter fluid generator as described in claim 1, characterized in that: The mixed leaves (32) are distributed in a spiral shape.

3. The mixing device for a selective catalytic converter fluid generator as described in claim 1, characterized in that: The drive assembly (4) includes a motor (41), a first bevel gear (42), a second bevel gear (43), and a third bevel gear (44). The output shaft of the motor (41) is connected to the third bevel gear (44). The first bevel gear (42) is mounted on the first feed pipe (2), and the second bevel gear (43) is mounted on the second feed pipe (3). The third bevel gear (44) meshes with the first bevel gear (42) and the second bevel gear (43). The transmission ratio of the first bevel gear (42) and the third bevel gear (44) is not equal to the transmission ratio of the second bevel gear (43) and the third bevel gear (44).

4. The mixing device for a selective catalytic converter fluid generator as described in claim 1, characterized in that: The purification mechanism (5) includes a power fan blade (51), a transmission assembly (52), and a filter plate (53). The power fan blade (51) is rotatably connected to the air outlet channel (12), and the filter plate (53) is rotatably connected to the air outlet channel (12). The filter plate (53) and the air outlet channel (12) are arranged coaxially. The power fan blade (51) is driven to the input end of the transmission assembly (52), and the output end of the transmission assembly (52) is driven to the filter plate (53). The power fan blade (51) is used to receive the wind power to drive the filter plate (53) to rotate around its circumference.

5. The mixing device for a selective catalytic converter fluid generator as described in claim 4, characterized in that: The purification mechanism (5) includes a scraper (54), which is fixedly connected to the air outlet channel (12), and the scraper (54) is attached to the end face of the filter plate (53) near the input end of the air outlet channel (12).

6. The mixing device for a selective catalytic converter fluid generator as described in claim 5, characterized in that: The purification mechanism (5) includes a fixing block (55), which is located in the air outlet channel (12) and is fixedly connected to the air outlet channel (12). The filter plate (53) is fixedly connected to the fixing block (55) and is located between the fixing block (55) and the scraper (54).

7. The mixing device for a selective catalytic converter fluid generator as described in claim 4, characterized in that: The transmission assembly (52) includes a first rotating shaft (521), a second rotating shaft (522), a fourth bevel gear (523), a fifth bevel gear (524), a mounting base (525), a transmission belt (526), ​​and a transmission gear (527). The first rotating shaft (521) is rotatably connected to the air outlet duct (12), and the power fan blade (51) is fixedly connected to the first rotating shaft (521). One end of the first rotating shaft (521) extends to the outside of the air outlet duct (12) and a fourth bevel gear (523) is arranged thereon. The fourth bevel gear (523) and the fifth bevel gear (524) mesh, the second rotating shaft (522) and the mounting base (525) are rotatably connected, the fifth bevel gear (524) is arranged on the second rotating shaft (522), the filter plate (53) has teeth on its outer periphery, the transmission gear (527) meshes with the teeth on the filter plate (53), the transmission gear (527) is rotatably connected to the mounting base (525) through the rotating shaft, and the transmission belt (526) is wound around the rotating shaft of the second rotating shaft and the transmission gear (527).

8. The mixing device for a selective catalytic converter fluid generator as described in claim 4, characterized in that: The purification mechanism (5) includes a collection box (56) for accommodating impurities filtered by the filter plate (53). The collection box (56) is fixedly connected to the air outlet channel (12). The opening of the collection box (56) is located between the filter plate (53) and the power fan blade (51), and the opening of the collection box (56) is connected to the air outlet channel (12).

9. The mixing device for a selective catalytic converter fluid generator as described in claim 1, characterized in that: A temperature controller (131) is installed on the air inlet channel (13).

10. A mixing device for a selective catalytic converter fluid generator as described in claim 1, characterized in that: The mixing cylinder (1) is provided with a collection channel (14), and a plug (15) is arranged in the collection channel.

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