A spray tower for treating tail gas from rare earth ore acid dissolution

Abstract

The invention provides a spray tower for treating tail gas from acid dissolution of rare earth ores, comprising a tower body spliced ​​together in multiple layers, wherein a window is installed on a side wall of the tower body; a spray device is installed inside the tower body, and the spray device comprises a rotating structure and an opening and closing structure, wherein an outer ring of the rotating structure is arranged adjacent to the inner side of the window; the opening and closing structure rotates along with the rotating structure; the opening and closing structure realizes opening and closing movement by self-rotation; a plurality of first spray heads rotating along with the rotating structure are installed on the rotating structure; a plurality of second spray heads opening and closing movement along with the rotating structure are installed on the opening and closing structure, wherein the second spray heads are deployed as the opening and closing structure is adjusted, and form a spray area covering the entire cross section of the tower body with the first spray heads; when the second spray heads are retracted as the opening and closing structure is adjusted, the second spray heads are close to the position of the first spray heads and are disassembled and assembled through the window; the window is used as a maintenance position, and the internal spray heads can pass through the window position by adjustment, so as to facilitate the staff to repair or replace the spray heads.

Description

Technical Field

[0001] The invention relates to the field of waste gas treatment equipment, and more specifically to a spray tower for treating tail gas from acid dissolution of rare earth ore. Background Art

[0002] In the process of rare earth ore processing and production, one of the links is acid dissolution treatment, which will produce a large amount of waste gas; lime milk solution is a commonly used alkaline solution in the process of rare earth ore processing and production. In order to save costs, in the actual production application process, part of the lime milk solution will also be used as a spray solution. Through the spraying of the spray tower, the waste gas generated in the acid dissolution process of rare earth ore can be treated to prevent the waste gas from being directly discharged and causing air pollution. The use of lime milk as a neutralizing spray liquid can also achieve the effect of energy saving and emission reduction;

[0003] However, lime milk solution may form lumps and dirt during the actual spraying application process. Although it will be filtered to remove the lumps and dirt, it is also very easy to form lumps at the nozzles and nozzles, causing blockages. However, the current spray towers, especially for medium and large spray towers, are more troublesome to inspect or disassemble and replace the nozzles. They need to be disassembled as a whole or the staff needs to enter the spray tower to operate. The inspection is very inconvenient and 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 spray tower for treating acid-dissolved tail gas from rare earth ores. The tower has a novel structure and the window area of ​​the spray tower can be used as a maintenance area. The internal nozzle can be adjusted to pass through the window position, which is convenient for staff to inspect or replace the nozzle and is easy to use and operate.

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

[0006] The invention provides a spray tower for treating tail gas from acid dissolution of rare earth ores, comprising a tower body and a pumping device, wherein the tower body comprises a tower bottom, a tower cover, and a multi-layer tower body installed between the tower bottom and the tower cover, wherein a window is provided on a side wall of the tower body, and a viewing window is provided on the outer side of the window; the pumping device is used for pumping spray liquid to each spraying position; a spray device is installed inside the tower body, and the spray device comprises a rotating structure and an opening and closing structure, wherein the outer ring of the rotating structure is arranged adjacent to the inner side of the window; the opening and closing structure is installed on the rotating structure and rotates along with the rotating structure; the opening and closing structure realizes opening and closing movement by self-rotation; a plurality of first spray heads rotating along with the rotating structure are installed on the rotating structure; a plurality of second spray heads opening and closing movement along with the rotating structure are installed on the opening and closing structure, and the second spray heads and the first spray heads converge through a pipeline and are connected with an external pumping device; the second spray heads realize an expansion action along with the adjustment of the opening and closing structure, and form a spray area covering the entire cross section of the tower body with the first spray head; when the second spray head realizes a retraction action along with the adjustment of the opening and closing structure, the second spray head is close to the position of the first spray head and is disassembled and assembled through the window.

[0007] In a preferred technical solution of the present invention, a first spray pipe that rotates therewith is installed on the rotating structure, and a plurality of second spray pipes that open and close therewith are installed on the opening and closing structure, each second spray pipe is connected to the first spray pipe through a hose, the first spray pipe is connected to a pipe joint movably installed on the tower body via a conduit, and the pipe joint is connected to an external pumping device; a plurality of first nozzles are installed at the bottom of the first spray pipe, and a second nozzle is installed at the bottom of each second spray pipe.

[0008] In a preferred technical solution of the present invention, a support ring is fixedly provided on the inner wall of the tower body; the rotating structure includes a plane bearing and a support ring, the stator of the plane bearing is installed on the top surface of the support ring, and the support ring is installed on the rotor of the plane bearing; the inner diameter of the support ring is smaller than the inner diameter of the plane bearing, and the first spray pipe is fixedly installed on the bottom surface of the support ring, close to the edge of the inner ring; the pipe joint is threadedly installed on the wall of the tower body on one side of the window, the manifold is fixedly connected to the first spray pipe, and the other end of the manifold is connected to the pipe joint.

[0009] In a preferred technical solution of the present invention, a support plate is fixedly provided at a position of the support ring close to the window, a gasket is fixedly provided on the top surface of the support plate, and the inner wall of the gasket is provided with a thread; the bottom surface of the support ring slides against the top surface of the gasket; a first through hole is provided on the support ring, the position of the first through hole corresponds to the position of the inner hole of the gasket and the shape is adapted, a first locking knob is installed at the first through hole, and the support ring is locked by the first locking knob; when the support ring is locked, the end of the manifold is aligned with the end of the pipe joint.

[0010] In a preferred technical solution of the present invention, the pumping device is provided with a plurality of shunt pipes corresponding to the plurality of tower bodies, the outer diameter of the shunt pipes is adapted to the inner diameter of the pipe joint and is threadedly connected; the end of the collecting pipe is adapted to the inner diameter of the pipe joint and is threadedly connected; a second threaded hole is provided on the side wall of the tower body, the pipe joint is threadedly connected to the second threaded hole, lateral movement and adjustment are achieved along the second threaded hole, and connection or disconnection with the collecting pipe is achieved.

[0011] In a preferred technical solution of the present invention, a magnet ring is embedded and installed on the top surface of the gasket ring; a plurality of magnet sheets are embedded and installed on the bottom surface of the support ring, and the plurality of magnet sheets are distributed in a circular array around the axis of the support ring. The positions of the magnet sheets correspond to the positions of the magnet ring, and the magnet ring is magnetically connected to the magnet sheets.

[0012] In a preferred technical solution of the present invention, the opening and closing structure includes a circular ring and multiple swing bars; at least two first arc-shaped holes are provided on the circular ring, and the circular ring slides against the top surface of the support ring, and a first limiting bolt is installed on the top surface of the support ring, and the first limiting bolt passes through the circular ring through the first arc-shaped hole, so that the circle rotates around the center of the support ring; a second arc-shaped hole is provided on the swing bar, and one end of the swing bar is rotatably connected to the circular ring through the second limiting bolt; a plurality of support blocks are fixedly provided on one side of the inner ring of the support ring, and the plurality of support blocks are distributed in an array around the central circumference of the support ring, and a third limiting bolt is installed on the support block, and the third limiting bolt passes through the swing bar through the second arc-shaped hole; the end of the swing bar moves with the circular ring, and moves along the third limiting bolt through the second arc-shaped hole to realize the opening and closing of the plurality of swing bars; the second spray pipe is fixedly installed at the bottom of the swing bar, and the bottom of one end of the second spray pipe is connected to the bottom of the first spray pipe through a hose.

[0013] In a preferred technical solution of the present invention, a first threaded hole is provided on the top surface of one side of the inner ring of the support ring, and the first threaded hole corresponds to the position of the first through hole; a second through hole is correspondingly provided on the circular ring, and the circular ring is locked by a second locking knob provided at the second through hole and the first threaded hole to maintain the opening and closing structure in an expanded state.

[0014] The beneficial effects of the present invention are:

[0015] The present invention provides a spray tower for treating tail gas from acid dissolution of rare earth ores. A spray device is installed inside the tower body, and the spray device includes a rotating structure and an opening and closing structure. The outer ring of the rotating structure is arranged adjacent to the inner side of a window. The opening and closing structure is installed on the rotating structure and rotates along with the rotating structure. The opening and closing structure realizes opening and closing movement by self-rotation. A plurality of first spray heads rotating along with the rotating structure are installed on the rotating structure. A plurality of second spray heads opening and closing movement along with the rotating structure are installed on the opening and closing structure. The second spray heads and the first spray heads converge through pipelines and are connected with an external pumping device. When performing spray purification work, the second spray heads are in an extended position, and form a spray area covering the entire cross section of the tower body with the first spray heads, thereby realizing effective spraying.

[0016] When the nozzle needs to be repaired or replaced, the second nozzle is moved closer to the edge by adjusting the opening and closing structure, and the rotating structure is coordinated so that both the first nozzle and the second nozzle can be repaired or disassembled and replaced through the window;

[0017] With overall coordination, the window of the spray tower can be used as a maintenance site, and the internal nozzle can be adjusted to be close to the window position, which is convenient for staff to inspect or replace the nozzle without large-scale disassembly or entering the tower for operation, and it is easy to use and operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The specific embodiment of the present invention discloses a three-dimensional structural schematic diagram of a spray tower for treating tail gas from acid dissolution of rare earth ore;

[0019] Figure 2 yes Figure 1 A magnified view of part A;

[0020] Figure 3 is a schematic diagram of a three-dimensional structure of a tower body from a first viewing angle disclosed in a specific embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of a three-dimensional structure of a tower body from a second viewing angle disclosed in a specific embodiment of the present invention;

[0022] Figure 5 The specific embodiment of the present invention discloses a schematic diagram of a three-dimensional unfolded structure of a tower body;

[0023] Figure 6 is a schematic diagram of a three-dimensional structure of a spray device from a first viewing angle disclosed in a specific embodiment of the present invention;

[0024] Figure 7 is a schematic diagram of a three-dimensional structure of a spray device from a second viewing angle disclosed in a specific embodiment of the present invention;

[0025] Figure 8 It is a schematic diagram of the three-dimensional unfolding structure of the spray device disclosed in a specific embodiment of the present invention;

[0026] Fig. 9 is a schematic diagram of a three-dimensional structure of a support ring disclosed in a specific embodiment of the present invention;

[0027] Fig.10 is a schematic diagram of the three-dimensional structure of a support ring disclosed in a specific embodiment of the present invention;

[0028] Fig.11 It is a schematic diagram of the three-dimensional structure of a ring disclosed in a specific embodiment of the present invention.

[0029] In the figure:

[0030] 100, tower body; 200, tower body; 210, window; 220, viewing window; 230, support ring; 231, support plate; 232, gasket; 234, magnet ring; 240, second threaded hole; 300, spray device;

[0031] 400, rotating structure; 410, first nozzle; 420, first spray pipe; 430, plane bearing; 440, support ring; 441, first through hole; 442, magnet sheet; 443, first threaded hole; 444, support block; 450, first locking knob; 460, first limiting bolt; 470, manifold; 480, third limiting bolt;

[0032] 500, opening and closing structure; 510, second nozzle; 520, second spray pipe; 530, circular ring; 531, first arc-shaped hole; 532, second through hole; 533, third through hole; 540, swing bar; 541, second arc-shaped hole; 550, second limiting bolt; 560, second locking knob;

[0033] 600, hose; 700, pipe joint; 800, pumping device; 810, diverter pipe. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0035] like Figures 1 to 5 As shown, a specific embodiment of the present invention discloses a spray tower for treating tail gas from acid dissolution of rare earth ores, comprising a tower body 100 and a pumping device 800. The tower body 100 comprises a tower bottom, a tower cover, and a multi-layer tower body 200 installed between the tower bottom and the tower cover. A window 210 is provided on the side wall of the tower body 200, and a viewing window 220 is installed on the outer side of the window 210. The pumping device is used to pump the spray liquid to each spraying position. A spray device 300 is installed inside the tower body 200. The spray device 300 comprises a rotating structure 400 and an opening and closing structure 500. The outer ring of the rotating structure 400 is arranged adjacent to the inner side of the window 210. The opening and closing structure 500 is arranged It is installed on the rotating structure 400 and rotates along with the rotating structure; the opening and closing structure realizes opening and closing movement by self-rotation; a plurality of first nozzles 410 that rotate along with the rotating structure are installed on the rotating structure 400; a plurality of second nozzles 510 that open and close along with the rotating structure 500 are installed, and the second nozzles and the first nozzles are merged through pipelines and connected with an external pumping device; the second nozzles are deployed as the opening and closing structure is adjusted, and form a spraying area covering the entire cross-section of the tower body with the first nozzle; when the second nozzles are retracted as the opening and closing structure is adjusted, the second nozzles are close to the position of the first nozzles and can be disassembled and assembled through the window.

[0036] The above-mentioned spray tower for treating tail gas from acid dissolution of rare earth ore can provide sufficient spray coverage to ensure effective spray effect; and when the nozzle is inspected or replaced, the second nozzle can be moved closer to the edge by adjusting the opening and closing structure, and the first nozzle and the second nozzle can be inspected or disassembled and replaced through the window in coordination with the rotating structure; with the overall coordination, the window of the spray tower can be used as the inspection site, without large-scale disassembly or entering the tower for operation, which is convenient for the staff to inspect or replace the nozzle, and is easy to use and operate;

[0037] It should be noted that in actual use, a climbing frame is built on the outside of the spray tower, and the spraying situation needs to be checked regularly; the climbing frame is also for staff to climb when inspecting the sprinkler head.

[0038] Furthermore, if Figures 2 to 4 As shown, a first spray pipe 420 that rotates therewith is installed on the rotating structure 400, and a plurality of second spray pipes 520 that open and close therewith are installed on the opening and closing structure 500, and each second spray pipe 520 is connected to the first spray pipe 420 via a hose 600, and the first spray pipe 420 is connected to a pipe joint 700 movably installed on the tower body via a confluence pipe 470, and the pipe joint is connected to an external pumping device; a plurality of first nozzles 410 are installed at the bottom of the first spray pipe 420, and a second nozzle 510 is installed at the bottom of each of the second spray pipes 520; the use of a hose can ensure that the first spray pipe and the plurality of second spray pipes can be effectively conducted, thereby ensuring the normal transportation and diversion of the spray liquid, and will not affect the opening and closing action of the opening and closing structure.

[0039] Furthermore, if Figures 3 to 8 As shown, a support ring 230 is fixedly arranged on the inner wall of the tower body 200; the rotating structure 400 includes a plane bearing 430 and a support ring 440, the stator of the plane bearing 430 is mounted on the top surface of the support ring 230, and the support ring 440 is mounted on the rotor of the plane bearing 430; the inner diameter of the support ring is smaller than the inner diameter of the plane bearing, and the first spray pipe 410 is fixedly mounted on the bottom surface of the support ring 440, close to the edge of the inner ring; using the plane bearing as a rotating support component can effectively reduce the rotation damping, and it is convenient for the staff to rotate the entire support ring by manual adjustment , perform the required adjustment operation; the pipe joint 700 is threadedly connected and installed on the wall of the tower body 200 on one side of the window 210, the manifold 470 is fixedly connected to the first spray pipe 410, and the other end of the manifold 470 is connected to the pipe joint 700 for conduction. The manifold is used as the total input pipeline, and the required conduction can be met through a single connecting part, which is convenient for subsequent disassembly, disconnection and connection. It should be noted that the plane bearing is a common auxiliary rotating device, which can be purchased or customized on the market, and the specific structure is not described in detail.

[0040] Furthermore, if Fig.10 As shown, a support plate 231 is fixedly provided at a position of the support ring 230 near the window, a gasket 232 is fixedly provided on the top surface of the support plate 231, and a thread is provided on the inner wall of the gasket; the bottom surface of the support ring 440 is slidably supported on the top surface of the gasket 232; Fig. 9 As shown, a first through hole 441 is provided on the support ring 440, and the position of the first through hole 441 corresponds to the position of the inner hole of the gasket ring 232 and the shape is adapted thereto. A first locking knob 450 is installed at the first through hole 441, and the support ring is locked by the first locking knob, so that the support ring cannot be easily loosened or shifted, which can prevent the movement of the opening and closing structure from being affected, and avoid affecting the overall spraying range and effect; and when the support ring 440 is locked, the end of the manifold 470 is aligned with the end of the pipe joint 700, which can achieve a corresponding alignment effect, and facilitate the disassembly and assembly between the pipe joint and the manifold;

[0041] It should be noted that although the cooperation between the pipe joint and the manifold can also prevent the support ring from moving, the pipe joint is, after all, the connection part for infusion conduction. If it is subjected to force alone, it may be damaged or loose. The spray liquid will be discharged directly at the pipe joint, and the required spray effect cannot be provided through the nozzle.

[0042] Furthermore, if Figure 1 , Figure 2 As shown, the pumping device 800 is provided with a plurality of shunt pipes 810 corresponding to the plurality of tower bodies 200, the outer diameter of the shunt pipe 810 is adapted to the inner diameter of the pipe joint 700, and is threadedly connected; the end of the manifold 470 is adapted to the inner diameter of the pipe joint 700, and is threadedly connected; Figure 5 As shown, the side wall of the tower body 200 is provided with a second threaded hole 240, and the pipe joint 700 is threadedly connected at the second threaded hole 240, and lateral movement adjustment is achieved along the second threaded hole, and connection or disconnection with the manifold is achieved; the pipe joint is threadedly connected to the wall of the tower body, and radial movement can be achieved by rotation, so as to facilitate detachment from the manifold, but at the same time maintain connection and cooperation with the shunt pipe, and maintain the height position; subsequently, after the maintenance is completed, the support ring is adjusted to make the manifold reset to the corresponding position again, and the support ring is first fixed by the first locking knob, and then the pipe joint is adjusted to make it connected and conductive with the manifold.

[0043] Furthermore, the pumping device includes a water tank, a booster pump, a first delivery pipe, and a second delivery pipe. The booster pump is connected to the water tank through the first delivery pipe. The second delivery pipe is connected with multiple branch pipes, and the branch pipes are connected to the corresponding pipe joints; a tee is connected at the water inlet of the water tank, and one interface of the tee is connected to the bottom of the tower bottom wall through a first branch pipe, and the first branch pipe is provided with a first switch valve; the other interface of the tee is connected with a second branch pipe, and the second branch pipe is installed with a second switch valve, and the second branch pipe is used to empty the internal circulating spray liquid; a feeding pipe is also provided on the top of the water tank, and an end cover is provided on the feeding pipe for replenishing the spray liquid inside the water tank.

[0044] Furthermore, a magnet ring 234 is embedded and installed on the top surface of the gasket ring 232; a plurality of magnet sheets 442 are embedded and installed on the bottom surface of the support ring 440, and the plurality of magnet sheets are arranged in a circular array around the axis of the support ring, and the positions of the magnet sheets correspond to the positions of the magnet rings, and the magnet rings are magnetically connected to the magnet sheets; through the cooperation of the magnet rings and the magnet sheets, the rotation of the support ring can be limited to a certain extent, and a fixed-point rotation effect can be achieved, so that the nozzle rotated in place can be maintained near the window for maintenance operations;

[0045] Furthermore, the support ring is provided with a plurality of strip holes penetrating the upper and lower walls, the strip holes extending in the radial direction of the support ring, and the plurality of strip holes are distributed in an array around the central circumference of the support ring, which can reduce its overall weight, production cost, and rotation force on one hand; on the other hand, the strip holes can be used as gripping parts to better rotate and adjust the position of the support ring;

[0046] Furthermore, if Figures 6 to 8 As shown, the opening and closing structure 500 includes a ring 530 and a plurality of swing bars 540; Fig.11 As shown, at least two first arc holes 531 are provided on the circular ring 530, and the circular ring 530 is slidably held against the top surface of the supporting ring 440. The top surface of the supporting ring 440 is installed with a first limiting bolt 460, and the first limiting bolt 460 penetrates the circular ring 530 through the first arc hole 531, so that the circular ring rotates around the center of the supporting ring; a second arc hole 541 is provided on the swing bar 540, and one end of the swing bar 540 is rotatably connected to the circular ring 530 through the second limiting bolt 550; a plurality of supporting blocks are fixedly provided on one side of the inner ring of the supporting ring 440 444, a plurality of support blocks are arranged in an array around the central circumference of the support ring, a third limiting bolt 480 is installed on the support block 444, and the third limiting bolt 480 penetrates the swing bar 540 through the second arc hole 541; the end of the swing bar moves with the ring and moves along the third limiting bolt through the second arc hole to realize the opening and closing of the plurality of swing bars; the second spray pipe 520 is fixedly installed at the bottom of the swing bar 540, and the bottom of one end of the second spray pipe 520 is connected with the bottom of the first spray pipe 420 through a hose 600;

[0047] The above structural design allows the end of the swing bar to rotate accordingly when the ring is rotated, and to swing under the limitation of the swing bar by the third limit bolt, thereby achieving inward distribution and forming a multi-circle spraying range; it can also allow the swing bar to move closer to the edge position, thereby facilitating the inspection and maintenance of the second nozzle at the window position.

[0048] Furthermore, a first threaded hole 443 is provided on the top surface of one side of the inner ring of the support ring 440, and the first threaded hole corresponds to the position of the first through-hole; a second through-hole 532 is correspondingly provided on the circular ring 530, and the circular ring 530 is locked by a second locking knob 560 penetrated by the second through-hole 532 and the first threaded hole 443, so as to maintain the opening and closing structure in an expanded state, prevent the swing bar from being easily loosened or deviated, prevent the expansion distribution of the second nozzle from being affected, and maintain the effective spraying range; further, a third through-hole 533 can also be provided on the circular ring, and when the third through-hole swings to the position corresponding to the first threaded hole and is locked by the second locking knob, the swing bar is at this time in a position close to the inner wall of the circular ring, so that the second spray pipe and the second nozzle are close to the position of the support ring, and the retracted state is maintained, and the position of the circular ring and the window can be changed by rotating the support ring, so that the second nozzle can be close to the window for easy maintenance.

[0049] Furthermore, a plurality of first nozzles are threadedly installed at the bottom of the first spray pipe, and the plurality of first nozzles are distributed in an array around the central circumference of the first spray pipe; at least two second nozzles are threadedly installed at the bottom of the second spray pipe, and when the opening and closing structure is in the expanded state, the swing bar swings to the corresponding position, and the second nozzles at the corresponding positions form a ring-shaped distribution profile, thereby forming a multi-circle nested spray area from the inside to the outside, and the spray areas are staggered and overlapped with each other to achieve a full coverage effect, thereby effectively spraying and purifying the flue gas passing below.

[0050] More specifically, when performing maintenance, climb to the corresponding height and remove the corresponding window; then adjust the pipe joint to separate the manifold from the pipe joint; then adjust the second locking knob to release the lock of the ring; then rotate the ring to move the swing bar to a position close to the inner wall of the ring, so that it is in a retracted state; then adjust the first locking knob to release the lock of the support ring, and by rotating the support ring, the first nozzle and the second nozzle pass through the window position, thereby performing the required maintenance action;

[0051] After the inspection is completed, the support ring needs to be rotated to the position corresponding to the first perforation and the gasket, and locked by the first locking knob; then the pipe joint is adjusted to connect the pipe joint with the manifold; then, the second locking knob is adjusted to release the lock of the ring, and then the ring is rotated again to make the second perforation correspond to the position of the first threaded hole, and then the ring is locked by the second locking knob. At this time, the swing bar expands toward the center of the circle, so that the second nozzle moves to the corresponding position, realizing multi-circle distribution and providing full coverage of the spraying area.

[0052] 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 spray tower for treating tail gas from acid dissolution of rare earth ore, comprising a tower body and a pumping device, wherein the tower body comprises a tower bottom, a tower cover, and a multi-layer tower body installed between the tower bottom and the tower cover, a window is provided on the side wall of the tower body, and a viewing window is installed on the outside of the window; the pumping device is used to pump the spray liquid to each spraying position; the characteristics are: A spray device is installed inside the tower body, and the spray device includes a rotating structure and an opening and closing structure. The outer ring of the rotating structure is arranged adjacent to the inner side of the window; the opening and closing structure is installed on the rotating structure and rotates with the rotating structure; the opening and closing structure realizes the opening and closing movement by self-rotation; The rotating structure is provided with a plurality of first nozzles which rotate therewith; the opening and closing structure is provided with a plurality of second nozzles which open and close therewith; the second nozzles and the first nozzles are merged through a pipeline and are connected with an external pumping device; The second nozzle is deployed with the adjustment of the opening and closing structure, and forms a spraying area covering the entire tower section with the first nozzle; When the second nozzle realizes the retracting action as the opening and closing structure is adjusted, the second nozzle approaches the position of the first nozzle and is disassembled and assembled through the window; A first spray pipe that rotates therewith is installed on the rotating structure, and a plurality of second spray pipes that open and close therewith are installed on the opening and closing structure. Each second spray pipe is connected to the first spray pipe through a hose. The first spray pipe is connected to a pipe joint movably installed on the tower body through a manifold, and the pipe joint is connected to an external pumping device. A plurality of first spray heads are installed at the bottom of the first spray pipe, and a second spray head is installed at the bottom of each second spray pipe; A support ring is fixedly provided on the inner wall of the tower body; The rotating structure includes a plane bearing and a support ring. The stator of the plane bearing is installed on the top surface of the support ring, and the support ring is installed on the rotor of the plane bearing. The inner diameter of the support ring is smaller than the inner diameter of the plane bearing. The first spray pipe is fixedly installed on the bottom surface of the support ring, close to the edge of the inner ring. The pipe joint is threadedly installed on the tower wall at one side of the window, the manifold is fixedly connected to the first spray pipe, and the other end of the manifold is connected to the pipe joint for conduction; The opening and closing structure includes a ring and a plurality of swing bars; At least two first arc-shaped holes are provided on the circular ring, and the circular ring is slidably supported on the top surface of the supporting ring. A first limiting bolt is installed on the top surface of the supporting ring, and the first limiting bolt passes through the circular ring through the first arc-shaped hole, so that the circular ring rotates around the center of the supporting ring; A second arc hole is provided on the swing bar, and one end of the swing bar is rotatably connected to the circular ring through a second limiting bolt; a plurality of supporting blocks are fixedly provided on one side of the inner ring of the supporting ring, and the plurality of supporting blocks are arranged in an array around the central circumference of the supporting ring, and a third limiting bolt is installed on the supporting block, and the third limiting bolt passes through the swing bar through the second arc hole; The end of the swing bar moves along with the circular ring and moves along the third limiting bolt through the second arc hole to realize the opening and closing of the multiple swing bars; The second spray pipe is fixedly installed at the bottom of the swing bar, and the bottom of one end of the second spray pipe is connected with the bottom of the first spray pipe through a hose.

2. A spray tower for treating tail gas from acid dissolution of rare earth ore according to claim 1, characterized in that: A support plate is fixedly provided at a position of the support ring near the window, a gasket is fixedly provided on the top surface of the support plate, and a thread is provided on the inner wall of the gasket; the bottom surface of the support ring slides against the top surface of the gasket; The support ring is provided with a first through hole, the position of the first through hole corresponds to the position of the inner hole of the gasket ring, and the shape is adapted, and a first locking knob is installed at the first through hole, and the support ring is locked by the first locking knob; When the support ring is locked, the end of the manifold is aligned with the end of the pipe joint.

3. A spray tower for treating tail gas from acid dissolution of rare earth ore according to claim 2, characterized in that: The pumping device is provided with a plurality of shunt pipes corresponding to the plurality of tower bodies, the outer diameter of the shunt pipes is adapted to the inner diameter of the pipe joints and is threadedly connected; the end of the confluence pipe is adapted to the inner diameter of the pipe joints and is threadedly connected; The side wall of the tower body is provided with a second threaded hole, and the pipe joint is threadedly connected to the second threaded hole, so that lateral movement adjustment is realized along the second threaded hole, and connection or disconnection with the manifold is realized.

4. A spray tower for treating tail gas from acid dissolution of rare earth ore according to claim 3, characterized in that: A magnet ring is embedded and installed on the top surface of the gasket ring; A plurality of magnet sheets are embedded and installed on the bottom surface of the support ring. The plurality of magnet sheets are distributed in a circular array around the axis of the support ring. The positions of the magnet sheets correspond to the positions of the magnet rings. The magnet rings are connected to the magnet sheets by magnetic attraction.

5. A spray tower for treating tail gas from acid dissolution of rare earth ore according to claim 4, characterized in that: A first threaded hole is provided on the top surface of one side of the inner ring of the support ring, and the first threaded hole corresponds to the position of the first through hole; A second through hole is correspondingly provided on the circular ring, and the circular ring is locked by a second locking knob which is provided at the second through hole and the first threaded hole, so as to maintain the opening and closing structure in an expanded state.

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