Rare earth production waste gas treatment spray tower

Abstract

The invention provides a rare earth production waste gas treatment spray tower, which comprises a tower body and a pumping device, the tower body comprises a tower bottom, a tower cover and at least one layer of tower body arranged between the tower bottom and the tower cover, the side wall of the tower body is provided with a window, and the outer side of the window is provided with a window; spraying devices are mounted at the bottoms of the tower cover and the tower body; the pumping device is used for pumping spraying liquid to each spraying device; a slag discharging opening is formed below the window, and a cover plate is mounted on the outer side of the slag discharging opening; a screen frame used for containing filler is rotationally arranged in the tower body, a discharging opening is formed in the side wall of the screen frame, and the bottom of the discharging opening is flush with the bottom of the slag discharging opening. An adjusting structure for driving the screen frame to rotate is arranged in the tower body, and an adjusting part of the adjusting structure extends to the window; the adjusting structure is adjusted to drive the screen frame to rotate, so that the filler in the screen frame is discharged from the slag discharging opening; and therefore, the difficulty of replacing the filler is reduced, the time of replacing the filler is shortened, and the efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of spray towers, and more specifically to a spray tower for treating waste gas from rare earth production. Background Art

[0002] During the rare earth processing and production process, a large amount of waste gas is generated, which needs to be treated by a spray tower before it can be discharged. Among them, the packed spray tower is a common one. The internal packing increases the contact area between the spray liquid and the waste gas and provides a place for microorganisms to attach, effectively improving the overall purification efficiency and quality.

[0003] However, it also has an obvious defect. At present, the filler is replaced by taking it out and putting it in through the window. Especially when the filler is taken out, due to the certain height difference between the window and the support net, it is very difficult to take out the internal filler. It is also necessary to use a hook rake for hooking, which is troublesome to operate and requires a lot of manpower and time, so it needs to be improved. Summary of the invention

[0004] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to propose a rare earth production waste gas treatment spray tower so that the internal filler can be removed, the difficulty of filler replacement can be reduced, the time of filler replacement can be shortened, and the efficiency can be improved.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The invention provides a rare earth production waste gas treatment spray tower, comprising a tower body and a pumping device, wherein the tower body comprises a tower bottom, a tower cover, and at least one tower body installed between the tower bottom and the tower cover, wherein the side wall of the tower body is provided with a window, and a viewing window is installed on the outside of the window; the tower cover and the bottom of the tower body are provided with a spray device, and the pumping device is used to pump the spray liquid to each spray device; a slag discharge port is provided below the window, and a cover plate is installed on the outside of the slag discharge port; a mesh frame for placing fillers is rotatably provided inside the tower body, and a discharge port is provided on the side wall of the mesh frame, and the bottom of the discharge port extends to the bottom inner wall of the mesh frame, and the bottom of the discharge port is flush with the bottom of the slag discharge port; an adjusting structure for driving the mesh frame to rotate is provided inside the tower body, and the adjusting part of the adjusting structure extends to the window; the adjusting structure is used to drive the mesh frame to rotate after adjustment, so that the internal fillers are discharged from the slag discharge port.

[0007] In a preferred technical solution of the present invention, the spray device includes a grid and a spray pipe group installed at the bottom of the grid, a nozzle is provided at the bottom of the spray pipe group, and the grid is fixedly installed on the tower body; a support ring is fixedly provided on the edge of the top surface of the grid, and a plurality of countersunk holes are provided on the support ring, and the countersunk holes are distributed in an array around the center circumference of the support ring; a universal ball bearing is installed at each countersunk hole, and the ball of the universal ball bearing protrudes from the top surface of the support ring; the grid frame is rollingly supported by a plurality of universal ball bearings, and the grid frame rotates close to the inner wall of the tower body.

[0008] In a preferred technical solution of the present invention, the mesh frame includes a mesh plate, a plurality of vertical poles fixedly arranged at the edge of the mesh plate, and a support ring fixedly arranged at the top of the vertical pole; a discharge port is formed between two adjacent vertical poles; the mesh plate is rotatably arranged above the corresponding spray device; the outer diameter of the support ring and the mesh plate is adapted to the inner diameter of the tower body; a toothed ring is arranged on the top surface of the support ring, and the teeth of the toothed ring are arranged upward;

[0009] The adjusting structure is arranged above the gear ring, and an adjustable rotatable gear is arranged on the adjusting structure. The gear is meshed with the gear ring to drive the screen frame to rotate.

[0010] In a preferred technical solution of the present invention, the adjustment structure includes a gear, a bracket, and a rotating shaft; the bracket is installed on the tower body by bolts, the bracket spans the top of the net frame, and one end of the bracket extends to the window; the rotating shaft is rotatably installed on the bracket, and one end of the rotating shaft passes through the bracket and extends to the window for cooperating with an external adjustment handwheel; the gear is fixed on the rotating shaft.

[0011] In a preferred technical solution of the present invention, a material guide structure is installed on the top of the grid plate. The material guide structure can be adjusted to form a frustum-shaped structure with an upward bulge in the middle, which is used to push the filler toward the edge.

[0012] In a preferred technical solution of the present invention, the material guiding structure includes a pull plate and a plurality of racks; a plurality of first clamping grooves protruding upward are fixedly provided on the top surface of the mesh plate, and the plurality of first clamping grooves are arranged in an array around the central circumference of the mesh plate; a first circular hole penetrating both sides is arranged at the first clamping groove; a plurality of second clamping grooves protruding outward are fixedly provided on the edge of the pull plate, and the second clamping grooves are arranged in an array around the central circumference of the pull plate and correspond to the positions of the first clamping grooves; a second circular hole penetrating both sides is arranged at the second clamping groove; a third circular hole is provided at one end of the rack, and a strip hole extending in the length direction is provided at the other end; one end of the rack provided with the third circular hole is rotatably mounted at the first clamping groove through a first pin shaft, and the other end is slidably matched with the second clamping groove through a second pin shaft penetrating the strip hole and the second circular hole;

[0013] A cable is fixedly provided in the middle of the top surface of the pull plate, and the pull plate is lifted by dragging the cable, so that the material guiding structure is deformed into a frustum-shaped structure with a middle part raised upward.

[0014] In a preferred technical solution of the present invention, a lifting ring assembly is rotatably installed at the bottom of the bracket, and the lifting ring assembly is biased to one side of the center of the pull plate; a plurality of first hanging rings are fixedly provided on the inner wall of the support ring, and the first hanging rings are distributed in a circular array around the axis of the support ring; a hook is fixedly installed at one end of the cable away from the pull plate, and the cable movably passes through the lifting ring assembly and is buckled at the first hanging ring through the hook; when the screen frame rotates, the cable is dragged to cause the material guide structure to rise and fall and deform.

[0015] In a preferred technical solution of the present invention, the lifting ring assembly includes a lifting ring and a swivel; the swivel includes a pressure plate, a convex column fixedly arranged on the bottom surface of the pressure plate, and a fourth circular hole is correspondingly arranged on the bracket, and the aperture of the fourth circular hole is adapted to the diameter of the convex column; a sleeve is fixedly arranged on the top of the lifting ring, and the sleeve is installed on the bottom end of the convex column, and the lifting ring assembly is rotatably installed at the fourth circular hole.

[0016] The beneficial effects of the present invention are:

[0017] The present invention provides a rare earth production waste gas treatment spray tower, wherein a slag discharge port is provided below a window of a tower body, and a cover plate is installed outside the slag discharge port; a mesh frame for placing fillers is rotatably provided inside the tower body, and a discharge port is provided on the side wall of the mesh frame, and the bottom of the discharge port extends to the bottom inner wall of the mesh frame, and the bottom of the discharge port is flush with the bottom of the slag discharge port; by using the additionally provided slag discharge port as a location for the fillers to be discharged, it is unnecessary to clean the window, thereby reducing the trouble caused by the height difference and facilitating operation;

[0018] In addition, an adjustment structure for driving the mesh frame to rotate is provided in the tower body, and the adjustment part of the adjustment structure extends to the window; the adjustment structure is used to drive the mesh frame to rotate, so that the internal filler is discharged from the slag discharge port; the mesh frame can be rotated to change the position, which has a stirring effect on the filler, and the filler at the internal position can also be smoothly brought out, thereby accelerating the unloading and discharging speed;

[0019] The design and coordination of the overall structure uses the window as the feeding site, the slag discharge port as the discharging site, and the rotatable screen frame to accelerate the discharging, which can effectively reduce the difficulty of packing replacement, shorten the time of packing replacement, and improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a rare earth production waste gas treatment spray tower provided in a specific embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of a three-dimensional structure of a tower body from a first viewing angle provided in a specific embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of a three-dimensional structure of a tower body from a second viewing angle provided in a specific embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of a three-dimensional unfolded structure of a tower body provided in a specific embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of the three-dimensional structure of the regulating structure provided in a specific embodiment of the present invention;

[0025] Figure 6is a schematic diagram of a three-dimensional unfolded structure of an adjustment structure provided in a specific embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of the three-dimensional unfolding structure of the screen frame and the adjusting structure provided in a specific embodiment of the present invention;

[0027] Figure 8 is a schematic diagram of the three-dimensional structure of a screen frame provided in a specific embodiment of the present invention;

[0028] Fig. 9 is a schematic diagram of the three-dimensional structure of the rack provided in a specific embodiment of the present invention;

[0029] Fig.10 It is a schematic diagram of the state after the material guiding structure provided in the specific embodiment of the present invention is raised.

[0030] In the figure:

[0031] 110, tower bottom; 120, tower cover; 130, spray device; 131, grid; 132, support ring; 133, countersunk hole; 134, universal ball bearing;

[0032] 200, tower body; 210, window; 220, slag discharge port;

[0033] 300, mesh frame; 310, mesh plate; 311, first clamping groove; 320, vertical pole; 330, support ring; 340, discharge port; 350, gear ring; 360, material guide structure; 361, pull plate; 3611, second clamping groove; 362, frame bar; 3621, strip hole; 363, cable; 364, hook; 370, first hanging ring;

[0034] 400, adjusting structure; 410, gear; 420, bracket; 421, fourth circular hole; 430, rotating shaft; 440, lifting ring assembly; 441, lifting ring; 442, rotating head. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0036] like Figures 1 to 4As shown, a specific embodiment of the present invention discloses a rare earth production waste gas treatment spray tower, including a tower body and a pumping device, the tower body includes a tower bottom 110, a tower cover 120, and at least one tower body 200 installed between the tower bottom and the tower cover, the side wall of the tower body 200 is provided with a window 210, and the outer side of the window is provided with a viewing window; the tower cover and the bottom of the tower body are provided with a spray device 130, and the pumping device is used to pump the spray liquid to each spray device; a slag discharge port 220 is provided below the window 210, and the slag discharge port A cover plate is installed on the outer side of the tower body 200; a mesh frame 300 for placing fillers is rotatably provided inside the tower body 200, and a discharge port 340 is provided on the side wall of the mesh frame 300, and the bottom of the discharge port extends to the bottom inner wall of the mesh frame, and the bottom of the discharge port 340 is flush with the bottom of the slag discharge port 220; an adjusting structure 400 for driving the mesh frame to rotate is provided inside the tower body 200, and the adjusting part of the adjusting structure extends to the window; the adjusting structure 400 is adjusted to drive the mesh frame 300 to rotate so that the internal fillers are discharged from the slag discharge port.

[0037] The above-mentioned rare earth production waste gas treatment spray tower uses an additional slag discharge port as the location for the filler to be discharged, and there is no need to clean at the window, which reduces the trouble caused by the height difference and is easy to operate;

[0038] Moreover, the screen frame can be adjusted to rotate, so that the position can be changed back and forth, which can stir the filler and make the filler in the internal position be smoothly brought out, thereby accelerating the unloading and discharging speed; the design and coordination of the overall structure, with the window as the feeding position and the slag discharge port as the discharging position, and the rotatable screen frame is used to accelerate the discharging, which can effectively reduce the difficulty of filling replacement, shorten the time of filling replacement, and improve efficiency; it should be noted that the spray tower is a relatively mature purification equipment, and the equipment structure matched with the air intake, exhaust, and pumping device is well known, and the details are not repeated; for the present invention, in actual use, a spherical filler structure is preferably used, which is more convenient for external discharge and cleaning; and the diameter of the filler is larger than the bottom notch of the screen frame to prevent affecting the operation of other structural components.

[0039] Furthermore, if Figure 4 As shown, the spray device 130 includes a grid 131 and a spray pipe group installed at the bottom of the grid, a nozzle is provided at the bottom of the spray pipe group, and the grid is fixedly installed on the tower body; a support ring 132 is fixedly provided on the edge of the top surface of the grid 131, and a plurality of countersunk holes 133 are provided on the support ring 132, and the countersunk holes are distributed in an array around the central circumference of the support ring; a universal ball bearing 134 is installed at each countersunk hole 133, and the ball of the universal ball bearing protrudes from the top surface of the support ring; the net frame 300 is rollingly supported by a plurality of universal ball bearings 134, and the net frame 300 rotates closely against the inner wall of the tower body 200; this structure can leave a distance between the net frame and the grid, and the universal ball bearing is used as a rolling support component to reduce the difficulty of rotating the net frame and facilitate subsequent adjustment operations.

[0040] Furthermore, if Figure 7 , Figure 8 As shown, the mesh frame 300 includes a mesh plate 310, a plurality of vertical rods 320 fixedly arranged at the edge of the mesh plate 310, and a support ring 330 fixedly arranged at the top of the vertical rods 320; a discharge port 340 is formed between two adjacent vertical rods 320; sufficient discharge space is provided, and the discharge of the filler from the mesh frame is not affected;

[0041] The mesh plate 310 is rotatably arranged above the corresponding spray device 130; the outer diameters of the support ring 330 and the mesh plate 310 are adapted to the inner diameter of the tower body 200; a gear ring 350 is arranged on the top surface of the support ring 330, and the teeth of the gear ring are arranged upward; an adjustment structure 400 is arranged above the gear ring 350, and an adjustable rotatable gear 410 is arranged on the adjustment structure 400, and the gear 410 is meshed with the gear ring 350 to drive the mesh frame to rotate, and a simple rotating structure is used to complete the adjustment action, which is easy to operate.

[0042] Furthermore, if Figures 4 to 6 As shown, the adjustment structure 400 includes a gear 410, a bracket 420, and a rotating shaft 430; the bracket 420 is installed on the tower body 200 by bolts, the bracket 420 spans the top of the net frame 300, and one end of the bracket 420 extends to the window 210; the rotating shaft 430 is rotatably installed on the bracket 420, and one end of the rotating shaft 430 passes through the bracket and extends to the window 210, which is used to cooperate with the external adjustment hand wheel; the gear 410 is fixed on the rotating shaft 430;

[0043] More specifically, the bracket includes two support bars arranged opposite to each other, a first docking plate is fixedly mounted between one end portions of the two support bars, and a second docking plate is fixedly mounted between the other end portions; the outer wall of the first docking plate is arc-shaped, which is adapted to the shape of the inner wall of the tower body, and the first docking plate is fixed to the inner wall of the tower body by bolts; the outer wall of the second docking plate is fixedly provided with a flange, the shape of the flange is adapted to the shape of the inner wall of the window, and the flange is fixed to the inner wall of the window by bolts; so that the bracket is fixedly installed at the tower body; a plug is fixedly provided at the middle part of the inner wall of the first docking plate, and a fifth circular hole is correspondingly provided on the second docking plate, and a rotating shaft is rotatably mounted at the plug and the fifth circular hole; the whole is a detachable structure, which is convenient for the processing and production of various structural components, and is also convenient for assembly and installation to the tower body; wherein, when adjusting, a hand wheel is required, a clamping sleeve is fixedly provided at the center of the hand wheel, and a prism block is fixedly provided at the end of the rotating shaft away from the plug, and the clamping sleeve can be sleeved on the prism block for docking, so as to facilitate the rotation and adjustment of the rotating shaft to achieve the required adjustment.

[0044] Furthermore, if Figure 8 , Fig.10As shown, a material guide structure 360 ​​is installed on the top of the grid plate 310. The material guide structure can be adjusted to form a frustum-shaped structure with an upward bulge in the middle, which is used to push the filler toward the edge, accelerate the movement of the filler to the side discharge port, and facilitate external discharge.

[0045] Furthermore, if Figure 8 As shown, the material guide structure 360 ​​includes a pull plate 361 and a plurality of rack bars 362; a plurality of first clamping grooves 311 protruding upwards are fixedly provided on the top surface of the grid plate 310, and the plurality of first clamping grooves are distributed in an array around the central circumference of the grid plate; a first circular hole is provided at the first clamping groove that runs through both sides; a plurality of second clamping grooves 3611 protruding outwards are fixedly provided on the edge of the pull plate 361, and the second clamping grooves are distributed in an array around the central circumference of the pull plate and correspond to the positions of the first clamping grooves; a second circular hole is provided at the second clamping groove that runs through both sides; a third circular hole is provided at one end of the rack bar 362, and a strip hole 3621 extending along the length direction is provided at the other end; one end of the rack bar 362 provided with the third circular hole is rotatably mounted on the first clamping groove 311 through a first pin shaft, and the other end is slidably matched with the second clamping groove 3611 through a second pin shaft penetrating the strip hole and the second circular hole; a cable 363 is fixedly provided at the middle of the top surface of the pull plate 361, and the pull plate is driven to rise by dragging the cable, as shown in FIG. Fig.10 As shown, the material guide structure is deformed into a frustum-shaped structure with an upward bulge in the middle. This structural design allows the material guide structure to have a deformation foundation. Before deformation, it maintains a flat position to prevent the packing from being unevenly piled up, and to avoid the packing from being piled up on one side and affecting the flow and distribution of the spray liquid and the exhaust gas, thereby ensuring the overall distribution and intersection uniformity and the purification effect. When discharge is required, the material guide structure can be adjusted to bulge, so that the packing rolls to the edge position, and the deformation action can be adjusted back and forth to achieve a stirring effect, thereby accelerating the discharge of the packing. Moreover, after the new packing is subsequently added, the packing can be stirred by rotating the mesh frame and adjusting the material guide structure to make it evenly distributed, thereby preventing the packing from accumulating on the side close to the window.

[0046] Furthermore, if Figure 5 , Figure 6 As shown, a lifting ring assembly 440 is rotatably mounted on the bottom of the bracket 420, and the lifting ring assembly 440 is biased to one side of the center of the pull plate 361; a plurality of first hanging rings 370 are fixedly arranged on the inner wall of the support ring 330, and the first hanging rings are arranged in a circular array around the axis of the support ring;

[0047] like Figure 7 , Figure 8 As shown, a hook 364 is fixedly installed at one end of the cable 363 away from the pull plate 361. Figure 4As shown, the cable 363 movably passes through the lifting ring assembly 440 and is buckled at the first hanging ring 370 through the hook 364; when the screen frame rotates, the cable is dragged to cause the material guide structure to rise and fall and deform; this structural design allows the material guide structure to rise and fall back and forth as the screen frame rotates, without the need for additional adjustment, easy to operate, and can effectively accelerate the discharge of fillers.

[0048] Furthermore, if Figure 6 As shown, the lifting ring assembly 440 includes a lifting ring 441 and a rotating head 442; the rotating head includes a pressing plate, a convex column fixedly arranged on the bottom surface of the pressing plate, and a fourth circular hole 421 is correspondingly arranged on the bracket 420, and the aperture of the fourth circular hole is adapted to the diameter of the convex column; a sleeve is fixedly arranged on the top of the lifting ring, and the sleeve is sleeved and installed on the bottom end of the convex column, and the lifting ring assembly 440 is rotatably installed at the fourth circular hole 421; the sleeve is connected to the convex column by a bolt or a pin, which does not affect the rotation effect required by the lifting ring assembly and prevents the lifting ring from loosening and falling from the rotating head; a frame plate is fixedly installed on the two support bars, the fourth circular hole is arranged at the center of the frame plate, and the lifting ring assembly is installed on the frame plate;

[0049] The distance from the lifting ring assembly to the pull plate axis is within the range of 1 / 3 to 2 / 3 of the mesh frame radius. The appropriate position can be selected according to different mesh frame depths and lifting height requirements, so that the material guide structure can be transformed into a frustum when being dragged by the cable, allowing the internal filler balls to roll around.

[0050] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A rare earth production waste gas treatment spray tower, comprising a tower body and a pumping device, the tower body comprising a tower bottom, a tower cover, and at least one tower body installed between the tower bottom and the tower cover, the side wall of the tower body is provided with a window, and a viewing window is installed on the outside of the window; the tower cover and the bottom of the tower body are installed with a spray device, and the pumping device is used to pump the spray liquid to each spray device; characterized in that: A slag discharge port is provided below the window, and a cover plate is installed on the outside of the slag discharge port; A mesh frame for placing fillers is provided inside the tower body, and a discharge port is provided on the side wall of the mesh frame. The bottom of the discharge port extends to the bottom inner wall of the mesh frame, and the bottom of the discharge port is flush with the bottom of the slag discharge port. An adjusting structure for driving the mesh frame to rotate is arranged in the tower body, and the adjusting part of the adjusting structure extends to the window; the adjusting structure is used to drive the mesh frame to rotate after adjustment, so that the internal filler is discharged from the slag discharge port.

2. A rare earth production waste gas treatment spray tower according to claim 1, characterized in that: The spray device includes a grid and a spray pipe group installed at the bottom of the grid. A spray head is provided at the bottom of the spray pipe group. The grid is fixedly installed at the tower body. A support ring is fixedly provided at the edge of the top surface of the grid frame, and a plurality of countersunk holes are provided on the support ring, and the countersunk holes are distributed in an array around the central circumference of the support ring; a universal ball bearing is installed at each countersunk hole, and the ball of the universal ball bearing protrudes from the top surface of the support ring; The net frame is supported by multiple universal ball bearings and rotates close to the inner wall of the tower.

3. A rare earth production waste gas treatment spray tower according to claim 2, characterized in that: The mesh frame includes a mesh plate, a plurality of vertical poles fixedly arranged at the edge of the mesh plate, and a support ring fixedly arranged at the top of the vertical pole; a discharge port is formed between two adjacent vertical poles; The grid plate is rotatably arranged above the corresponding spray device; The outer diameters of the support ring and the grid plate are adapted to the inner diameter of the tower body; a toothed ring is provided on the top surface of the support ring, and the teeth of the toothed ring are arranged upward; The adjusting structure is arranged above the gear ring, and an adjustable rotatable gear is arranged on the adjusting structure. The gear is meshed with the gear ring to drive the screen frame to rotate.

4. A rare earth production waste gas treatment spray tower according to claim 3, characterized in that: The adjustment structure includes gears, brackets, and rotating shafts; The bracket is installed on the tower body by bolts, the bracket spans the top of the net frame, and one end of the bracket extends to the window; The rotating shaft is rotatably mounted on the bracket, and one end of the rotating shaft passes through the bracket and extends to the window for cooperating with an external adjusting hand wheel; The gear is fixed on the rotating shaft.

5. A rare earth production waste gas treatment spray tower according to claim 4, characterized in that: A material guide structure is installed on the top of the grid plate. The material guide structure can be adjusted to form a frustum-shaped structure with an upward bulge in the middle, which is used to push the filler toward the edge.

6. A rare earth production waste gas treatment spray tower according to claim 5, characterized in that: The material guiding structure includes a pull plate and a plurality of rack bars; A plurality of first clamping grooves protruding upward are fixedly provided on the top surface of the grid plate, and the plurality of first clamping grooves are distributed in an array around the central circumference of the grid plate; a first circular hole penetrating through two sides is provided at the first clamping groove; The edge of the pull plate is fixedly provided with a plurality of second clamping grooves protruding outward, the second clamping grooves are distributed in an array around the central circumference of the pull plate and correspond to the positions of the first clamping grooves; the second clamping grooves are provided with second circular holes penetrating both sides; A third circular hole is provided at one end of the frame bar, and a strip hole extending along the length direction is provided at the other end; One end of the frame bar provided with the third circular hole is rotatably mounted at the first clamping groove through the first pin shaft, and the other end is slidably matched with the second clamping groove through the second pin shaft penetrating the strip hole and the second circular hole; A cable is fixedly provided in the middle of the top surface of the pull plate, and the pull plate is lifted by dragging the cable, so that the material guiding structure is deformed into a frustum-shaped structure with a middle part raised upward.

7. A rare earth production waste gas treatment spray tower according to claim 6, characterized in that: A lifting ring assembly is rotatably mounted on the bottom of the bracket, and the lifting ring assembly is biased to one side of the center of the pull plate; A plurality of first hanging rings are fixedly provided on the inner wall of the support ring, and the first hanging rings are distributed in a circular array around the axis of the support ring; A hook is fixedly installed at one end of the cable away from the pull plate, and the cable movably passes through the lifting ring assembly and is buckled at the first hanging ring through the hook; When the screen frame rotates, the cable is dragged to cause the material guide structure to rise and fall and deform.

8. A rare earth production waste gas treatment spray tower according to claim 7, characterized in that: The lifting ring assembly includes a lifting ring and a swivel; The rotating head includes a pressing plate, a convex column fixedly arranged on the bottom surface of the pressing plate, and a fourth circular hole correspondingly arranged on the bracket, and the aperture of the fourth circular hole is adapted to the diameter of the convex column; A sleeve is fixedly arranged on the top of the lifting ring, the sleeve is sleeved and installed on the bottom end of the convex column, and the lifting ring assembly is rotatably installed at the fourth circular hole.

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