A rapid recovery device for waste gas flue denitration catalyst

Abstract

This utility model belongs to the field of environmental protection equipment technology, and in particular to a rapid recovery device for flue gas denitrification catalyst, comprising: a base; a screening cylinder; a screw conveyor for conveying the catalyst to be recovered into the screening cylinder; a screw conveying assembly for driving the catalyst to move toward the tail end of the screening cylinder; a support assembly; a drive mechanism; and a preheating assembly; the preheating assembly removes volatile impurities (such as ammonia, small molecule organic matter, etc.) from the catalyst surface, further reducing the impurity content and providing high-quality raw materials for subsequent regeneration processes; the automated feeding of the screw conveyor and the continuous pushing and screening by the screw blades significantly improve working efficiency, adapting to the batch recovery needs of industrial-grade denitrification systems and reducing labor costs; the drive mechanism adjusts the tilt angle of the screening cylinder to accommodate different types of catalysts such as honeycomb and granular catalysts without requiring equipment replacement, reducing the equipment investment cost for enterprises.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection equipment technology, specifically relating to a rapid recovery device for denitrification catalysts in waste gas and flue gas, and particularly to a rapid recovery device for denitrification catalysts that have failed or need to be replaced in waste gas and flue gas denitrification systems. Background Technology

[0002] In waste gas treatment systems in industries such as power and chemical engineering, denitrification catalysts (mainly vanadium-titanium catalysts) are the core components for achieving flue gas denitrification. They convert nitrogen oxides (NOx) in flue gas into harmless nitrogen and water through catalytic reduction reactions. However, after 1-3 cycles (about 2-5 years) of use, denitrification catalysts will fail due to activity decay, surface scaling, or mechanical wear, and need to be disassembled from the denitrification system and recycled.

[0003] The existing recycling methods have the following problems: 1. Volatile impurities (ammonia, small molecule organic matter, etc.) are easily attached to the catalyst surface, and single screening cannot completely separate them, affecting the recycling purity; 2. There is a lack of continuous operation structure, which makes it difficult to adapt to the batch recycling needs of industrial-grade denitrification systems, and the screening angle is not adjustable, making it difficult to adapt to the recycling needs of different catalysts (such as honeycomb and granular denitrification catalysts).

[0004] To address the aforementioned issues, this application proposes a rapid recovery device for flue gas denitrification catalyst. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a rapid recovery device for flue gas denitrification catalyst, which features convenient use, high recovery efficiency, high recovery purity, and wide applicability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rapid recovery device for flue gas denitrification catalyst, comprising: Base; A screening cylinder is rotatably mounted on the base. The bottom end of the screening cylinder is provided with a screen hole, the top end is provided with a feed port, and the tail end of the screening cylinder is provided with a coarse material discharge hole. A screw conveyor for conveying the catalyst to be recovered into the screening cylinder; A screw conveyor assembly is disposed inside the screening cylinder and is used to drive the catalyst to move toward the tail end of the screening cylinder; A support assembly is fixed to the top surface of the base, and the screening cylinder is rotatably mounted on the top of the support assembly; A drive mechanism drives the screening cylinder to rotate, thereby adjusting the tilt angle of the screening cylinder; A preheating component, which is wrapped around the outside of the screening cylinder, is used to preheat the catalyst to be recovered inside the screening cylinder to remove volatile impurities.

[0007] Preferably, it further includes: The C-shaped baffle is fixed to the top of the feeding port and surrounds the discharge port of the screw conveyor.

[0008] Preferably, the spiral conveyor assembly includes: A rotating shaft is rotatably disposed inside the screening cylinder; Helical blades, the helical blades being fixed to the outer wall of the rotating shaft; A first servo motor is fixed to the end face of the screening cylinder and is used to drive the rotating shaft to rotate.

[0009] Preferably, the preheating component includes: An electric heating tape, wherein the electric heating tape is spirally wound around the outside of the screening cylinder; A heat insulation sleeve is wrapped around the outside of the electric heating tape.

[0010] Preferably, the support component includes: Two perforated support plates are symmetrically fixed to the top surface of the base. A fixed shaft is fixed to the outer wall of the screening cylinder, and the fixed shaft passes through the perforated support plate to form a rotating structure.

[0011] Preferably, the drive mechanism includes: A fixing block, wherein the fixing block is fixed to the bottom surface of the screening cylinder; A movable seat that moves to fit against the top surface of the base; The two support arms are symmetrically distributed, and the bottom end of the support arm is pivotally connected to the movable seat by a pin, and the top end is pivotally connected to the fixed block by a pin. Two fixing plates are fixed to the top surface of the base at intervals. A threaded screw is rotatably disposed between the two fixed plates, and the movable seat is threadedly engaged with the threaded screw; The second servo motor is fixed to the outer wall of the fixed plate and is used to drive the threaded screw to rotate.

[0012] Preferably, the drive mechanism further includes: Guide rods, two of which are symmetrically fixed between the two fixed plates and pass through the movable seat.

[0013] Preferably, a fine material discharge port is fixed on the bottom surface of the screening cylinder at the position corresponding to the screen hole, and a coarse material discharge slide is fixed at the tail end of the screening cylinder at the position corresponding to the coarse material discharge hole.

[0014] Preferably, it further includes: A fine material collection trolley is positioned directly below the fine material discharge port; A coarse material collection trolley is positioned directly below the coarse material unloading slide.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. The preheating component removes volatile impurities (such as ammonia and small molecule organic matter) from the catalyst surface, further reducing the impurity content and providing high-quality raw materials for subsequent regeneration processes; 2. The automated feeding of the screw conveyor and the continuous pushing and screening by the screw blades significantly improve the working efficiency, which can be adapted to the batch recycling needs of industrial-grade denitrification systems and reduce labor costs. 3. By adjusting the tilt angle of the screening cylinder through the drive mechanism, different types of catalysts such as honeycomb and granular catalysts can be accommodated without replacing the equipment, thus reducing the equipment investment cost for enterprises.

[0016] Other additional advantages and benefits of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the screening cylinder in this utility model; Figure 3 This is a schematic diagram of the isometric structure of the electric heating cable in this utility model; Figure 4 This is a schematic diagram of the installation structure of the electric heating tape in this utility model; Figure 5 This utility model Figure 1 A magnified schematic diagram of the drive mechanism in the diagram.

[0018] In the diagram: 1. Screw conveyor; 2. Base; 3. Screening cylinder; 31. Screen hole; 32. Feed port; 321. C-shaped baffle; 33. Fine material discharge port; 34. Coarse material discharge port; 35. Coarse material discharge slide plate; 4. Screw conveyor assembly; 41. Rotating shaft; 42. Screw blade; 43. First servo motor; 5. Drive mechanism; 51. Fixed block; 52. Moving seat; 53. Support arm; 54. Fixed plate; 55. Threaded screw; 56. Second servo motor; 57. Guide rod; 6. Preheating assembly; 61. Electric heating tape; 62. Heat insulation sleeve; 7. Perforated support plate; 8. Fixed shaft; 9. Fine material collection trolley; 10. Coarse material collection trolley. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-5 The present invention provides the following technical solution: a rapid recovery device for denitrification catalyst of waste gas, comprising: a base 2, a screening cylinder 3, a screw elevator 1, a screw conveying assembly 4, a support assembly, a drive mechanism 5, and a preheating assembly 6.

[0021] Furthermore, by Figure 1 As shown, in this embodiment, the screening cylinder 3 is rotatably mounted on the base 2. The bottom end of the screening cylinder 3 has a screen hole 31, the top end has a feed inlet 32, and the tail end of the screening cylinder 3 has a coarse material discharge hole 34. The screw conveyor 1 is used to transport the catalyst to be recovered into the screening cylinder 3. The screw conveyor assembly 4 is located inside the screening cylinder 3 and is used to drive the catalyst towards the tail end of the screening cylinder 3. The support assembly is fixed to the top surface of the base 2, and the screening cylinder 3 is rotatably mounted on the top of the support assembly. The drive mechanism 5 drives the screening process. The cylinder 3 is flipped to adjust the tilt angle of the screening cylinder 3. The preheating component 6 is wrapped around the outside of the screening cylinder 3 to preheat the catalyst to be recovered inside the screening cylinder 3 to remove volatile impurities. After adopting the above scheme, the rapid recovery device is controlled by the PLC system during use. After the device is started, the PLC sends a speed control signal to the screw conveyor 1 according to the preset catalyst conveying amount. The screw conveyor 1 operates at the set speed and smoothly conveys the catalyst to be recovered from the storage unit to the feeding port 32 of the screening cylinder 3.

[0022] After the catalyst enters the screening cylinder 3, the PLC immediately starts the preheating component 6. Based on the composition characteristics of the catalyst to be recovered (such as the boiling point parameters of volatile impurities), the preheating temperature range (usually 80-120℃) is set. During the preheating process, the PLC simultaneously sends control commands to the drive mechanism 5 to adjust the tilt angle of the screening cylinder 3. The drive mechanism 5 adjusts the screening cylinder 3 to the optimal tilt state according to the humidity and particle looseness of the catalyst to be recovered: when the catalyst humidity is high and the particles are prone to agglomeration, the tail end of the screening cylinder 3 is tilted downward at a lower angle (such as 2-3°) to prolong the residence time of the material in the cylinder and ensure sufficient preheating; when the catalyst particles are dry and loose, the tilt angle is adjusted to a higher angle (such as 5-8°) to improve the material conveying efficiency.

[0023] Subsequently, the PLC starts the screw conveyor assembly 4 inside the screening cylinder 3 and sets the screw speed according to the inclination angle of the screening cylinder 3 and the material characteristics. When the screw conveyor assembly 4 is running, the blades push the catalyst to move slowly along the inner wall of the screening cylinder 3 to the tail end. During this process, the preheated screening cylinder 3 heats the catalyst and removes volatile impurities (such as ammonia, small molecule organic matter, etc.) from the surface of the catalyst.

[0024] After preheating, the catalyst moves to the tail end of the screening cylinder 3 under the action of the screw conveyor assembly 4. At this time, fine catalyst particles with a particle size smaller than the aperture of the screen hole 31 (usually 5-10 mm) fall out of the screen hole 31 under the combined action of gravity and screw pushing force. Meanwhile, coarse catalyst particles with a particle size larger than the screen hole 31 (containing impurities, agglomerates, or large catalyst pieces) continue to be pushed to the tail end of the screening cylinder 3 and discharged from the coarse material discharge hole 34.

[0025] Preferably, by Figure 1 , Figure 2 and Figure 4 As shown, this embodiment also includes: a C-shaped baffle 321. The discharge port of the screw conveyor 1 is located above the feed port 32. The C-shaped baffle 321 is fixed to the top of the feed port 32 and surrounds the discharge port of the screw conveyor 1. With the above solution, when the PLC system controls the screw conveyor 1 to deliver the catalyst to be recovered to the feed port 32 of the screening cylinder 3, the discharge port of the screw conveyor 1 forms a relatively closed unloading space under the surrounding of the C-shaped baffle 321, which avoids the material from splashing around due to the impact force when the screw conveyor 1 discharges, and ensures that the catalyst particles fall accurately into the feed port 32, reducing the loss of material scattered outside the screening cylinder 3.

[0026] Optionally, by Figure 1 and Figure 2As shown, in this embodiment, the screw conveyor assembly 4 includes: a rotating shaft 41, a screw blade 42, and a first servo motor 43. The rotating shaft 41 is rotatably disposed inside the screening cylinder 3, the screw blade 42 is fixed to the outer wall of the rotating shaft 41, and the first servo motor 43 is fixed to the end face of the screening cylinder 3 to drive the rotating shaft 41 to rotate. With the above scheme, when the PLC system starts the recycling process, when the catalyst to be recycled is guided into the screening cylinder 3 by the C-shaped baffle 321, the PLC immediately sends a start signal to the first servo motor 43 of the screw conveyor assembly 4 to drive the rotating shaft 41 to rotate. The screw blade 42 fixed to the outer wall of the rotating shaft 41 rotates synchronously, forming a pushing force along the axial direction of the screening cylinder 3.

[0027] In addition, the spiral blades 42 can both push the catalyst to move directionally towards the tail end during rotation and achieve slight stirring through contact between the blades and the material, so that the catalyst particles are constantly turned over, avoiding uneven preheating caused by local accumulation, and allowing each particle to fully contact the heat transferred from the inner wall of the screening cylinder 3, thus accelerating the volatilization efficiency of volatile impurities.

[0028] Optionally, by Figures 1-4 As shown in this embodiment, the preheating component 6 includes an electric heating tape 61 and a heat insulation sleeve 62. The electric heating tape 61 is spirally wound around the outside of the screening cylinder 3, and the heat insulation sleeve 62 is wrapped around the outside of the electric heating tape 61. With the above solution, when the preheating component 6 is started, the electric heating tape 61 forms a full-area wrapping heating of the screening cylinder 3 through the spiral winding structure, ensuring that the heat can be evenly transferred to every area of ​​the screening cylinder 3, and avoiding differences in the preheating effect of the catalyst due to uneven local heating.

[0029] The heat insulation sleeve 62 is made of aluminum silicate fiber, whose low thermal conductivity can lock the heat generated by the electric heating tape 61 in the space between the screening cylinder 3 and the heat insulation sleeve 62, reducing the loss of heat to the outside environment.

[0030] In addition, the temperature on the outside of the heat insulation sleeve 62 is not high (usually below 40°C), which avoids burns when operators come into contact with it, and also isolates the preheating effect from the interference of external ambient temperature fluctuations.

[0031] Optionally, by Figure 1 As shown in this embodiment, the support assembly includes: a perforated support plate 7 and a fixed shaft 8. The two perforated support plates 7 are symmetrically fixed to the top surface of the base 2, and the fixed shaft 8 is fixed to the outer wall of the screening cylinder 3. The fixed shaft 8 passes through the perforated support plate 7 to form a rotating structure. With the above solution, when in use, the two perforated support plates 7 symmetrically fixed to the top surface of the base 2 have their plate surfaces perpendicular to the axis of the screening cylinder 3, forming a symmetrical support frame.

[0032] The fixed shaft 8 is welded radially to the outer wall of the screening cylinder 3, and the two ends pass through the shaft holes of the perforated support plate 7 to form a rotating structure. A bearing is provided between the shaft hole and the fixed shaft 8, which not only ensures that the fixed shaft 8 can rotate flexibly, but also reduces the wear caused by long-term rotation, making the tilt adjustment action of the screening cylinder 3 smoother.

[0033] Optionally, by Figure 1 and Figure 5 As shown, in this embodiment, the driving mechanism 5 includes: a fixed block 51, a movable seat 52, a support arm 53, a fixed plate 54, a threaded screw 55, a second servo motor 56, and a guide rod 57. The fixed block 51 is fixed to the bottom surface of the screening cylinder 3, the movable seat 52 moves against the top surface of the base 2, the two support arms 53 are symmetrically distributed, and the bottom end of the support arm 53 is pivotally connected to the movable seat 52 by a pin, and the top end is pivotally connected to the fixed block 51 by a pin. The two fixed plates 54 are fixed to the top surface of the base 2 at intervals, the threaded screw 55 is rotatably disposed between the two fixed plates 54, the movable seat 52 is threadedly engaged with the threaded screw 55, and the second servo motor 56 is fixed to the outer wall of the fixed plate 54. The screw 55 is driven to rotate. Two guide rods 57 are symmetrically fixed between two fixed plates 54 and pass through the movable seat 52. With the above scheme, when it is necessary to adjust the tilt angle of the screening cylinder 3, the second servo motor 56 starts and drives the screw 55 to rotate between the two fixed plates 54. Since the movable seat 52 and the screw 55 are engaged by a trapezoidal thread and are limited by two symmetrically distributed guide rods 57, the movable seat 52 cannot rotate with the screw 55. It can only move linearly along the guide rods 57. When the screw 55 rotates forward, the movable seat 52 moves towards the head end of the screening cylinder 3; when it rotates in reverse, it moves towards the tail end.

[0034] The translation of the movable seat 52 is converted into the turning force of the screening cylinder 3 through the support arm 53: the bottom ends of the two symmetrically distributed support arms 53 are pivotally connected to the movable seat 52 by pins, and the top ends are also pivotally connected to the fixed block 51 by pins. When the movable seat 52 moves to the front end, the bottom end of the support arm 53 moves forward, and the top end is lifted upward under the constraint of the fixed block 51, pushing the screening cylinder 3 to turn upward and increasing the tilt angle; when the movable seat 52 moves to the rear end, the bottom end of the support arm 53 moves backward, and the top end pulls down the fixed block 51, causing the screening cylinder 3 to turn downward and decreasing the tilt angle.

[0035] Preferably, by Figure 1As shown in this embodiment, a fine material discharge port 33 is fixed on the bottom surface of the screening cylinder 3 at the position corresponding to the screen hole 31, and a coarse material discharge slide plate 35 is fixed at the tail end of the screening cylinder 3 at the position corresponding to the coarse material discharge hole 34. It also includes a fine material collection cart 9 and a coarse material collection cart 10. The fine material collection cart 9 is arranged directly below the fine material discharge port 33, and the coarse material collection cart 10 is arranged directly below the coarse material discharge slide plate 35. With the above scheme, when fine catalyst particles with a particle size smaller than the screen hole 31 fall from the screen hole 31, they will pass through the fine material discharge port 33 and fall into the fine material collection cart 9 below, which is convenient for subsequent centralized processing.

[0036] After the coarse catalyst is discharged from the coarse material discharge hole 34, it falls onto the inclined coarse material discharge slide plate 35 and slides down into the coarse material collection cart 10 below along the inclined direction of the coarse material discharge slide plate 35, which facilitates subsequent centralized processing.

[0037] It should be noted that the screw conveyor 1, the first servo motor 43, the second servo motor 56, and the electric heating tape 61 are all commercially available conventional equipment. Those skilled in the art can make conventional selections according to their needs. Their working principles are common knowledge known to those skilled in the art and have been fully disclosed in the prior art, so they will not be elaborated on further in this article.

[0038] The circuit connection involved in this utility model is a common method used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. It belongs to the widely used prior art.

[0039] Components not described in detail in this article are existing technologies.

[0040] The working principle and usage process of this utility model: The rapid recovery device for denitrification catalyst of this utility model is controlled by a PLC system. After the device is started, the PLC sends a speed control signal to the screw conveyor 1 according to the preset catalyst conveying amount. The screw conveyor 1 operates at the set speed and smoothly conveys the catalyst to be recovered from the storage unit to the feeding port 32 of the screening cylinder 3. After the catalyst enters the screening cylinder 3, the PLC immediately starts the preheating component 6. According to the composition characteristics of the catalyst to be recovered (such as the boiling point parameters of volatile impurities), the preheating temperature range (usually 80-120℃) is set. The electric heating tape 61 forms a full-area enveloping heating of the screening cylinder 3 through a spiral winding structure, ensuring that the heat can be evenly transferred to every area of ​​the screening cylinder 3, avoiding differences in the preheating effect of the catalyst due to uneven local heating. The heat insulation sleeve 62 is made of aluminum silicate fiber, whose low thermal conductivity can lock the heat generated by the electric heating tape 61 in the space between the screening cylinder 3 and the heat insulation sleeve 62, reducing the loss of heat to the outside environment. During the preheating process, the PLC synchronously sends control commands to the drive mechanism 5 to adjust the tilt angle of the screening cylinder 3. The drive mechanism 5 adjusts the screening cylinder 3 to the optimal tilt state according to the humidity and particle looseness of the catalyst to be recovered: when the catalyst humidity is high and the particles are prone to agglomeration, the tail end of the screening cylinder 3 is tilted downward at a lower angle to prolong the residence time of the material in the cylinder and ensure sufficient preheating; when the catalyst particles are dry and loose, the tilt angle is adjusted to a higher angle to improve the material conveying efficiency. Subsequently, the PLC starts the spiral conveying assembly 4 inside the screening cylinder 3. When the spiral conveying assembly 4 is running, the spiral blades 42 push the catalyst to move slowly along the inner wall of the screening cylinder 3 towards the tail end. During this process, the preheated screening cylinder 3 heats the catalyst and removes volatile impurities (such as ammonia, small molecule organic matter, etc.) from the surface of the catalyst. The preheated catalyst moves to the tail end of the screening cylinder 3 under the action of the screw conveyor assembly 4. At this time, the fine catalyst with a particle size smaller than the aperture of the screen hole 31 (usually 5-10 mm) falls out of the screen hole 31 under the combined action of gravity and screw pushing force. It will pass through the fine material discharge port 33 and fall into the fine material collection cart 9 below for convenient subsequent centralized processing. Coarse catalyst particles larger than the sieve aperture 31 (including impurity agglomerates or large catalyst pieces) are pushed to the tail end of the screening cylinder 3 and discharged from the coarse material discharge hole 34. They fall onto the inclined coarse material discharge slide plate 35 and slide down into the coarse material collection cart 10 below, facilitating subsequent centralized processing.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for rapid recovery of a flue gas denitration catalyst, characterized by, include: Base (2); Screening cylinder (3), the screening cylinder (3) is rotatably mounted on the base (2), the bottom end of the screening cylinder (3) is provided with a screen hole (31), the top end is provided with a feed port (32), and the tail end of the screening cylinder (3) is provided with a coarse material discharge hole (34). A screw conveyor (1) is used to convey the catalyst to be recovered into the screening cylinder (3); A spiral conveyor assembly (4) is disposed inside the screening cylinder (3) and is used to drive the catalyst to move toward the tail end of the screening cylinder (3); A support assembly is fixed to the top surface of the base (2), and the screening cylinder (3) is rotatably mounted on the top of the support assembly; The driving mechanism (5) drives the screening cylinder (3) to rotate, thereby adjusting the tilt angle of the screening cylinder (3). The preheating component (6) is wrapped around the outside of the screening cylinder (3) and is used to preheat the catalyst to be recovered inside the screening cylinder (3) to remove volatile impurities.

2. The device for quickly recovering a waste gas flue denitration catalyst according to claim 1, characterized in that: Also includes: The C-shaped baffle (321) is located above the feed port (32) of the screw conveyor (1). The C-shaped baffle (321) is fixed to the top of the feed port (32) and surrounds the feed port of the screw conveyor (1).

3. The device for quickly recovering a waste gas flue denitration catalyst according to claim 1, characterized in that: The spiral conveyor assembly (4) includes: A rotating shaft (41) is rotatably disposed inside the screening cylinder (3); Helical blade (42), the helical blade (42) is fixed to the outer wall of the rotating shaft (41); The first servo motor (43) is fixed to the end face of the screening cylinder (3) and is used to drive the rotating shaft (41) to rotate.

4. The device for quickly recovering a waste gas flue denitration catalyst according to claim 1, characterized in that: The preheating component (6) includes: Electric heating tape (61), wherein the electric heating tape (61) is spirally wound around the outside of the screening cylinder (3); and A heat insulation sleeve (62) is wrapped around the outside of the electric heat tracing tape (61).

5. The device for quickly recovering a waste gas flue denitration catalyst according to claim 1, characterized in that: The support components include: Perforated support plate (7), two of the perforated support plates (7) are symmetrically fixed to the top surface of the base (2); A fixed shaft (8) is fixed to the outer wall of the screening cylinder (3), and the fixed shaft (8) passes through the perforated support plate (7) to form a rotating structure.

6. The device for quickly recovering a waste gas flue denitration catalyst according to claim 1, characterized in that: The drive mechanism (5) includes: A fixing block (51) is fixed to the bottom surface of the screening cylinder (3); A movable seat (52) is movable to fit against the top surface of the base (2); Support arm (53), two support arms (53) are symmetrically distributed, and the bottom end of the support arm (53) is pivotally connected to the movable seat (52) by a pin, and the top end is pivotally connected to the fixed block (51) by a pin; Fixing plates (54), two of the fixing plates (54) are fixed at intervals to the top surface of the base (2); A threaded screw (55) is rotatably disposed between two fixed plates (54), and the movable seat (52) is threadedly engaged with the threaded screw (55). The second servo motor (56) is fixed to the outer wall of the fixed plate (54) and is used to drive the threaded screw (55) to rotate.

7. The device for quickly recovering a waste gas flue denitration catalyst according to claim 6, characterized in that: The drive mechanism (5) further includes: Guide rods (57), two guide rods (57) are symmetrically fixed between two fixed plates (54) and pass through the movable seat (52).

8. The device for quickly recovering a waste gas flue denitration catalyst according to claim 1, characterized in that: The bottom surface of the screening cylinder (3) is fixed with a fine material discharge port (33) corresponding to the position of the screen hole (31), and the tail end of the screening cylinder (3) is fixed with a coarse material discharge slide plate (35) corresponding to the position of the coarse material discharge hole (34).

9. The device for quickly recovering a waste gas flue denitration catalyst according to claim 8, characterized in that: Also includes: Fine material collection trolley (9) is positioned directly below the fine material discharge port (33); A coarse material collection trolley (10) is positioned directly below the coarse material unloading slide plate (35).

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