A rare earth calcination tail gas treatment device

Abstract

The present invention discloses a device for treating rare earth calcination tail gas, and the present invention relates to the field of tail gas treatment. A device for treating rare earth calcination tail gas according to the present invention comprises a treatment tank, an air inlet opened at the top of the treatment tank, and an air outlet opened at the bottom of the treatment tank. An installation plate is fixedly connected to the inner wall of the treatment tank. A filtering mechanism for filtering the pretreated rare earth calcination tail gas is arranged on the upper surface of the installation plate. A plurality of first partitions are fixedly connected to the inner wall of the treatment tank below the installation plate. A cylinder is fixedly connected to the middle of the plurality of first partitions, and a plurality of second partitions are fixedly connected to the inner wall of the cylinder. The present invention can continuously filter the rare earth calcination tail gas, thereby improving the tail gas treatment efficiency; can increase the contact area between the catalyst and the tail gas, improve the catalytic oxidation effect, remove organic gases, convert the organic gases into harmless substances such as carbon dioxide and water, and also improve the tail gas treatment quality.

Description

Technical Field

[0001] The present invention relates to the field of tail gas treatment, and particularly to a rare earth calcination tail gas treatment device. Background Art

[0002] Rare earth calcination is an important step in the extraction and refining process of rare earth elements, usually carried out at high temperatures. The purpose is to convert the compounds in rare earth ores into oxides or other available forms. Through high-temperature calcination, some impurities and volatile components in the ores can be removed, and the purity of rare earth products can be improved. During the calcination process, various tail gases are generated, such as fluorides, chlorides, sulfur dioxide, particulate matter, etc. Therefore, effective tail gas treatment is required to reduce environmental pollution.

[0003] In the existing rare earth calcination tail gas treatment process, the tail gas needs to be pretreated first, including cooling and dehumidification, so that the subsequent purification steps can be carried out more effectively; then, large particulate matter and dust in the tail gas are removed through a preliminary filtration device. According to the actual tail gas composition, the chemical absorption method can also be used, and absorbents (such as sodium hydroxide, calcium hydroxide, etc.) are used to remove acidic gases (such as fluorides, chlorides, etc.) in the waste gas and convert them into harmless compounds. Materials such as activated carbon are used to adsorb organic substances and odor substances in the waste gas; for organic gases that are difficult to remove, a catalytic oxidation device is used. Under the action of a catalyst, they are converted into harmless substances such as carbon dioxide and water; then cooling and dehydration are carried out, and the concentration of harmful components in the tail gas is monitored to ensure that the treatment effect meets environmental protection standards. After the purified tail gas passes the inspection, it can be safely discharged into the atmosphere;

[0004] In the process of removing large particulate matter and dust in the tail gas through a filtration device, a filter screen is usually used to filter the rare earth calcination tail gas. In the prior art, a pre-filtering device is mostly set before the main filter, which can remove larger particulate matter first, reduce the burden on the main filter screen, and extend its service life. However, after a long time of use, it will also become blocked, and the entire tail gas treatment device needs to be shut down to clean or replace the filter screen in the filter, which affects the tail gas treatment efficiency. Or, through a combined configuration of multiple filter screens or filtering units, when one filter screen reaches a certain resistance value during operation, another filter screen can take over the work, and the blocked filter screen or filtering unit can be cleaned during this time interval to ensure a continuous filtering process. However, the cleaning and replacement processes still require manual intervention, increasing the maintenance workload and time, and also affecting the tail gas treatment efficiency.

[0005] Therefore, it is very necessary to propose a rare earth calcination tail gas treatment device to solve the above problems. Summary of the Invention

[0006] The main object of the present invention is to provide a rare earth calcination tail gas treatment device, which can effectively solve the problems in the background technology.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A rare earth calcination tail gas treatment device includes a treatment tank, an air inlet opened at the top of the treatment tank, and an air outlet opened at the bottom of the treatment tank. An installation plate is fixedly connected to the inner wall of the treatment tank. A filtering mechanism for filtering the pretreated rare earth calcination tail gas is arranged on the upper surface of the installation plate. A plurality of first partitions are fixedly connected to the inner wall of the treatment tank below the installation plate. A cylinder is fixedly connected to the middle of the plurality of first partitions. A plurality of second partitions are fixedly connected to the inner wall of the cylinder. A plurality of partition meshes are fixedly connected to the surface of the cylinder. Round holes are formed on the surface of the first partitions. A stirring mechanism for stirring the catalyst is arranged on the surface of the plurality of second partitions. A first vertical plate and a second vertical plate are fixedly connected to the surface of the first partition. A heating plate is fixedly connected to the surface of the second vertical plate.

[0009] Preferably, the filtering mechanism includes a first vertical pipe fixedly connected to the lower surface of the top of the treatment tank below the air inlet. A second vertical pipe is slidably connected to the inner wall of the first vertical pipe. A first spring is sleeved outside the second vertical pipe. The upper end of the first spring is fixedly connected to one end of the first vertical pipe away from the air inlet. The lower end of the first spring is fixedly connected to a fixing ring, and the fixing ring is fixedly connected to the second vertical pipe. An annular filter screen is installed below the second vertical pipe in a matching manner. The annular filter screen is rotatably connected to the treatment tank. A second gear is meshed and connected to the inner side of the annular filter screen. The second gear is rotatably connected to the installation plate. A first gear is meshed and connected to the outside of the second gear. A transmission column is fixedly connected above the first gear. A first motor is fixedly connected to the upper surface of the top of the treatment tank. One end of the transmission column away from the first gear is fixedly connected to the output shaft of the first motor. A third vertical pipe is fixedly connected to the lower surface of the installation plate below the second vertical pipe. One of the round holes is communicated with the third vertical pipe;

[0010] One end of the transmission column close to the first gear is fixedly connected with a first bevel gear. The outside of the first bevel gear is meshed with a second bevel gear. The surface of the second bevel gear is fixedly connected with a first rotating column. One end of the first rotating column away from the second bevel gear is slidably connected with a second rotating column. The surface of the second rotating column is fixedly connected with an annular block. The surface of the annular block is fixedly connected with a second spring. The second spring is sleeved outside the second rotating column. One end of the second spring away from the annular block is fixedly connected with a rotating ring. The surface of the second rotating column is fitted with an L-shaped column. The rotating ring is rotatably connected with the L-shaped column. The L-shaped column is fixedly connected with the processing box. On the surface of the second rotating column at one end away from the first rotating column and symmetrically, there are convex columns fixedly connected. On the surface of the L-shaped column, there are arc-shaped blocks fixedly connected symmetrically. One end of the second rotating column away from the first rotating column is fixedly connected with a cleaning brush. The cleaning brush is fitted with the annular filter screen.

[0011] Preferably, a rectangular groove is formed in the end face of the first rotating column away from the second bevel gear, and the second rotating column is slidably connected with the rectangular groove.

[0012] Preferably, the initial states of the first spring and the second spring are both compressed states.

[0013] Preferably, the stirring mechanism includes a cylinder fixedly connected below the first gear. An elevating cylinder is sleeved outside the cylinder. The upper end of the elevating cylinder is fixedly connected with a connecting ring. Insertion rods evenly distributed in a ring shape are slidably inserted into the connecting ring. The upper ends of the plurality of insertion rods are all fixedly connected with the cylinder. A plurality of stirring columns are symmetrically fixedly connected to the outside of the elevating cylinder. A material discharging hole is formed in the middle of the surface of the second partition board. A cover plate is fitted on the surface of the material discharging hole. A plurality of cover plates are all rotatably connected with the elevating cylinder. On the lower surface of the second partition board in the low position, vertical columns are symmetrically fixedly connected. A column groove is formed in the surface of the vertical column. A T-shaped column is slidably connected to the groove wall of the column groove. A third spring is sleeved outside the T-shaped column. The lower ends of the two T-shaped columns are fixedly connected with a connecting plate. The lower end of the elevating cylinder is rotatably connected with the connecting plate.

[0014] Preferably, the initial state of the third spring is a stretched state.

[0015] Preferably, the lower surface of the connecting plate is fixedly connected with an adjusting rod, and the adjusting rod is slidably connected with the bottom of the processing box.

[0016] Preferably, an oxygen supply pipeline is fixedly connected in the processing box, and a plurality of the first vertical plates are all fixedly connected with the oxygen supply pipeline.

[0017] Beneficial effects

[0018] Compared with the prior art, the present invention provides a rare earth calcination tail gas treatment device, which has the following beneficial effects:

[0019] 1. For this rare earth calcination tail gas treatment device, the annular filter screen is set to filter the rare earth calcination tail gas, removing large particulate matter and dust. The first motor drives the transmission column to rotate, and then drives the first gear to rotate. The rotation of the first gear drives the second gear to rotate, and then drives the annular filter screen to rotate, continuously changing the filtering position of the annular filter screen, thereby ensuring the filtering quality of the rare earth calcination tail gas. Moreover, the rotation of the transmission column can drive the first bevel gear to rotate, and then drive the second bevel gear to rotate. The first rotating column and the second rotating column drive the cleaning brush to rotate, cleaning the surface of the annular filter screen, removing dust and large particulate matter. During the process of the cleaning brush cleaning the annular filter screen, as the second rotating column rotates, under the elastic force of the second spring, the convex column will continuously contact, separate, and then contact the arc-shaped block, that is, it can continuously drive the second rotating column and the cleaning brush to move back and forth, thereby making the cleaning effect better. Without shutting down the rare earth calcination tail gas treatment device, it can continuously filter the rare earth calcination tail gas, thus improving the tail gas treatment efficiency.

[0020] 2. For this rare earth calcination tail gas treatment device, during the catalytic oxidation process of the rare earth calcination tail gas, the first motor drives the transmission column to rotate, and then drives the first gear to rotate. The cylinder rotates as the first gear rotates. The cooperation of the insertion rod and the connecting ring enables the rotation of the cylinder to drive the lifting cylinder to rotate, and then drives multiple stirring columns to stir, which can increase the contact area between the catalyst and the tail gas. The filtered tail gas enters the lower part of the first partition at a high position through the third vertical pipe and the round hole at a high position, enters the lifting cylinder through the partition net, and then discharges from the partition net on the other side and passes through the round hole. This cycle is repeated several times to improve the catalytic oxidation effect, remove organic gases, and convert the organic gases into harmless substances such as carbon dioxide and water, also improving the tail gas treatment quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the internal structure of the treatment box of the present invention;

[0022] Figure 2 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 3 is the Figure 2 enlarged view of part A in the present invention;

[0024] Figure 4 is a partial structural schematic diagram of the first partition and the round hole of the present invention;

[0025] Figure 5 is the Figure 4 enlarged view of part B in the present invention;

[0026] Figure 6 is a schematic diagram of the partial structure of the oxygen supply pipeline of the present invention;

[0027] Figure 7 is a schematic diagram of the internal structure of the cylinder of the present invention;

[0028] Figure 8 is of the present invention Figure 7 enlarged view at C in;

[0029] Figure 9 is a schematic diagram of the partial structure of the annular filter screen of the present invention;

[0030] Figure 10 is of the present invention Figure 9 enlarged view at D in.

[0031] In the figure: 1, treatment box; 11, air inlet; 12, air outlet; 13, mounting plate; 14, first vertical plate; 15, second vertical plate; 16, heating plate; 2, filtering mechanism; 21, first vertical pipe; 22, second vertical pipe; 23, first spring; 24, fixing ring; 25, annular filter screen; 26, second gear; 27, first gear; 28, transmission column; 29, first motor; 210, third vertical pipe; 211, first bevel gear; 212, second bevel gear; 213, first rotating column; 214, second rotating column; 215, annular block; 216, second spring; 217, rotating ring; 218, L-shaped column; 219, convex column; 220, arc-shaped block; 221, cleaning brush; 222, rectangular groove; 3, first partition; 4, cylinder; 5, second partition; 6, partition net; 7, round hole; 8, stirring mechanism; 81, cylinder; 82, lifting cylinder; 83, connecting ring; 84, inserting rod; 85, stirring column; 86, blanking hole; 87, cover plate; 88, vertical column; 89, column groove; 810, T-shaped column; 811, third spring; 812, connecting plate; 813, adjusting rod; 9, oxygen supply pipeline. Detailed implementation manners

[0032] To make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0033] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7, A rare earth calcination tail gas treatment device, including a treatment box 1, an air inlet 11 opened at the top of the treatment box 1, and an air outlet 12 opened at the bottom of the treatment box 1. The inner wall of the treatment box 1 is fixedly connected with a mounting plate 13. The upper surface of the mounting plate 13 is provided with a filtering mechanism 2 for filtering the pretreated rare earth calcination tail gas. Below the mounting plate 13 on the inner wall of the treatment box 1, a plurality of first partitions 3 are fixedly connected. In the middle of the plurality of first partitions 3, a cylinder 4 is fixedly connected. The inner wall of the cylinder 4 is fixedly connected with a plurality of second partitions 5. The surface of the cylinder 4 is fixedly connected with a plurality of partition meshes 6. Circular holes 7 are opened on the surface of the first partitions 3. On the surface of the plurality of second partitions 5, a stirring mechanism 8 for stirring the catalyst is provided. On the surface of the first partitions 3, a first vertical plate 14 and a second vertical plate 15 are fixedly connected. On the surface of the second vertical plate 15, a heating plate 16 is fixedly connected;

[0034] It should be noted that the partition mesh 6 is an existing metal screen mesh;

[0035] It should be noted that the heating plate 16 can be powered on for heating to ensure that the rare earth calcination tail gas can be catalytically oxidized.

[0036] Please refer to Figure 1 and Figure 4 , The filtering mechanism 2 includes a first vertical pipe 21 fixedly connected to the lower surface of the top of the treatment box 1 and located below the air inlet 11. The inner wall of the first vertical pipe 21 is slidably connected with a second vertical pipe 22. A first spring 23 is sleeved outside the second vertical pipe 22. The upper end of the first spring 23 is fixedly connected to one end of the first vertical pipe 21 away from the air inlet 11. The lower end of the first spring 23 is fixedly connected with a fixing ring 24. The fixing ring 24 is fixedly connected with the second vertical pipe 22. Below the second vertical pipe 22, an annular filter screen 25 is fitted and installed. The annular filter screen 25 is rotatably connected with the treatment box 1. The inner side of the annular filter screen 25 is meshed with a second gear 26. The second gear 26 is rotatably connected with the mounting plate 13. The outside of the second gear 26 is meshed with a first gear 27. Above the first gear 27, a transmission column 28 is fixedly connected. The upper surface of the top of the treatment box 1 is fixedly connected with a first motor 29. One end of the transmission column 28 away from the first gear 27 is fixedly connected with the output shaft of the first motor 29. Below the second vertical pipe 22 on the lower surface of the mounting plate 13, a third vertical pipe 210 is fixedly connected. One of the circular holes 7 is communicated with the third vertical pipe 210;

[0037] One end of the surface of the transmission column 28 close to the first gear 27 is fixedly connected with a first bevel gear 211. The outer side of the first bevel gear 211 is meshed with a second bevel gear 212. The surface of the second bevel gear 212 is fixedly connected with a first rotating column 213. One end of the first rotating column 213 away from the second bevel gear 212 is slidably connected with a second rotating column 214. The surface of the second rotating column 214 is fixedly connected with an annular block 215. The surface of the annular block 215 is fixedly connected with a second spring 216. The second spring 216 is sleeved on the outer side of the second rotating column 214. One end of the second spring 216 away from the annular block 215 is fixedly connected with a rotating ring 217. The surface of the second rotating column 214 is fitted with an L-shaped column 218. The rotating ring 217 is rotatably connected with the L-shaped column 218. The L-shaped column 218 is fixedly connected with the processing box 1. Symmetrically fixed on the surface of the second rotating column 214 at one end of the second spring 216 away from the annular block 215 are convex columns 219. Symmetrically fixed on the surface of the L-shaped column 218 are arc-shaped blocks 220. One end of the second rotating column 214 away from the first rotating column 213 is fixedly connected with a cleaning brush 221. The cleaning brush 221 is fitted with the annular filter screen 25.

[0038] It should be noted that the tail gas enters the first vertical pipe 21 and the second vertical pipe 22 from the air inlet 11 and is filtered by the annular filter screen 25. The first motor 29 drives the transmission column 28 to rotate, thereby driving the first gear 27 to rotate, and then driving the second gear 26 to rotate. The transmission ratio between the first gear 27 and the second gear 26 is 8:1. The first gear 27 rotates fast, the second gear 26 rotates slowly, and the annular filter screen 25 rotates slowly. The rotation of the transmission column 28 can also drive the first bevel gear 211 to rotate, thereby driving the second bevel gear 212 to rotate. The first rotating column 213 rotates with the rotation of the second bevel gear 212, thereby driving the second rotating column 214 to rotate. The convex column 219 rotates with the rotation of the second rotating column 214. The convex column 219 can contact the surface of the arc-shaped block 220 and generate relative rotation, driving the second rotating column 214 and the cleaning brush 221 to move away from the first rotating column 213. When the convex column 219 separates from the arc-shaped block 220, the second rotating column 214 and the cleaning brush 221 can move towards the first rotating column 213. In this way, the cleaning brush 221 moves back and forth while rotating, so that the cleaning effect is better. Without stopping the operation of the rare earth calcination tail gas treatment device, the rare earth calcination tail gas can be continuously filtered, thereby improving the tail gas treatment efficiency.

[0039] Please refer to Figure 2 and Figure 3 As shown in, a rectangular groove 222 is provided on the end face of the first rotating column 213 away from the second bevel gear 212. The second rotating column 214 is slidably connected with the rectangular groove 222.

[0040] It should be noted that the rectangular groove 222 can cooperate with the second rotating column 214, enabling the rotation of the first rotating column 213 to stably drive the rotation of the second rotating column 214, and a relative movement is generated between the first rotating column 213 and the second rotating column 214.

[0041] Please refer to Figure 2 and Figure 4 , the initial states of the first spring 23 and the second spring 216 are both in a compressed state;

[0042] It should be noted that the reaction force generated by the compression of the first spring 23 acts on the surface of the fixed ring 24, enabling the second vertical pipe 22 to be in close contact with the surface of the annular filter screen 25, ensuring the filtering effect; the reaction force generated by the compression of the second spring 216 acts on the surface of the annular block 215, and further ensures that during the relative rotation between the convex column 219 and the arc-shaped block 220, the cleaning brush 221 can be stably rotated and will also move back and forth stably.

[0043] Please refer to Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 9 and Figure 10 , the stirring mechanism 8 includes a cylinder 81 fixedly connected below the first gear 27. An elevating cylinder 82 is sleeved outside the cylinder 81. A connecting ring 83 is fixedly connected to the upper end of the elevating cylinder 82. Insertion rods 84 evenly distributed in a ring shape are slidably inserted into the connecting ring 83. The upper ends of the plurality of insertion rods 84 are fixedly connected to the cylinder 81. A plurality of stirring columns 85 are symmetrically and fixedly connected to the outside of the elevating cylinder 82. A material discharging hole 86 is formed in the middle of the surface of the second partition plate 5. A cover plate 87 is fitted on the surface of the material discharging hole 86. The plurality of cover plates 87 are rotatably connected to the elevating cylinder 82. Vertical columns 88 are symmetrically and fixedly connected to the lower surface of the second partition plate 5 at a low position. A column groove 89 is formed in the surface of the vertical column 88. A T-shaped column 810 is slidably connected to the groove wall of the column groove 89. A third spring 811 is sleeved outside the T-shaped column 810. The lower ends of the two T-shaped columns 810 are fixedly connected to a connecting plate 812. The lower end of the elevating cylinder 82 is rotatably connected to the connecting plate 812;

[0044] It should be noted that the stirring mechanism 8 can stir the catalyst between the elevating cylinder 82, the second partition plate 5 and the cover plate 87, thereby increasing the contact area between the catalyst and the tail gas, and thus ensuring the catalytic oxidation effect;

[0045] The driving column 28 is rotated by the first motor 29. The first gear 27 rotates as the driving column 28 rotates. The cylinder 81 rotates as the first gear 27 rotates, thereby driving a plurality of stirring columns 85 to rotate, stirring the catalyst in the cylinder 4, which can increase the contact area between the catalyst and the tail gas. The filtered tail gas enters the lower part of the first partition 3 at a high position through the third vertical pipe 210 and the circular hole 7 at a high position, enters the lifting cylinder 82 through the partition net 6, and then discharges from the partition net 6 on the other side, and then passes through the circular hole 7. After repeating this several times, the heating plate 16 is electrified to heat up to the stability required for catalytic oxidation, improving the catalytic oxidation effect and the tail gas treatment quality, removing organic gases, and converting the organic gases into harmless substances such as carbon dioxide and water;

[0046] It should be noted that the internal space of the cylinder 4 is separated by a plurality of second partitions 5. Different catalysts can be placed in each separated space according to the actual composition of the rare earth calcination tail gas, so as to maximize the catalytic efficiency, remove organic gases, and convert the organic gases into harmless substances such as carbon dioxide and water.

[0047] Please refer to Figure 8 , the initial state of the third spring 811 is in a stretched state;

[0048] It should be noted that the reaction force generated by the stretching of the third spring 811 acts on the surface of the T-shaped column 810, enabling the cover plate 87 to be closely fitted with the blanking hole 86, preventing the tail gas from flowing down along the cylinder 4, and allowing the catalyst to come into full contact with the tail gas multiple times, thus ensuring the catalytic oxidation effect.

[0049] Please refer to Figure 4 and Figure 7 , a regulating rod 813 is fixedly connected to the lower surface of the connecting plate 812, and the regulating rod 813 is slidably connected to the bottom of the treatment tank 1;

[0050] It should be noted that the setting of the regulating rod 813 can facilitate the up and down adjustment of the cylinder 4, that is, the up and down adjustment of the cover plate 87. The upper surface of the second partition 5 is low in the center and high at the edges. After the cover plate 87 is separated from the blanking hole 86, the catalyst can slide down along the surface of the second partition 5 and discharge from the air outlet 12, thus facilitating the discharge of the catalyst; A plurality of feed pipes can be fixedly connected to the surface of the cylinder 4, and check valves can be installed in the feed pipes for catalyst feeding.

[0051] Please refer to Figure 1 and Figure 6 , an oxygen supply pipe 9 is fixedly connected inside the treatment tank 1, and a plurality of first vertical plates 14 are all fixedly connected to the oxygen supply pipe 9;

[0052] It should be noted that the oxygen supply pipeline 9 is used to supply oxygen into the treatment tank 1 during the catalytic oxidation process to ensure the smooth progress of the catalytic oxidation process; an intake valve can be provided at the intake end of the oxygen supply pipeline 9 to control the oxygen supply.

[0053] It should be noted that a controller can be installed on the upper surface of the top of the treatment tank 1 beside the first motor 29. The intake valve, the first motor 29, and the heating plate 16 are all electrically connected to the controller, and the controller is controlled by a computer.

[0054] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A rare earth calcination tail gas treatment device, comprising a treatment box (1), an air inlet (11) opened at the top of the treatment box (1) and an air outlet (12) opened at the bottom of the treatment box (1), characterized in that: The inner wall of the treatment box (1) is fixedly connected to a mounting plate (13), the upper surface of the mounting plate (13) is provided with a filtering mechanism (2) for filtering rare earth calcined tail gas after pretreatment, the inner wall of the treatment box (1) is located below the mounting plate (13) and is fixedly connected to a plurality of first baffles (3), a cylinder (4) is fixedly connected to the middle of the plurality of first baffles (3), a plurality of second baffles (5) are fixedly connected to the inner wall of the cylinder (4), a plurality of partition nets (6) are fixedly connected to the surface of the cylinder (4), a circular hole (7) is opened on the surface of the first baffle (3), a stirring mechanism (8) for stirring the catalyst is provided on the surface of the plurality of second baffles (5), a first vertical plate (14) and a second vertical plate (15) are fixedly connected to the surface of the first baffle (3), and a heating plate (16) is fixedly connected to the surface of the second vertical plate (15); The filtering mechanism (2) comprises a first vertical pipe (21) fixedly connected to the lower surface of the top of the processing box (1) and located below the air inlet (11); the inner wall of the first vertical pipe (21) is slidably connected to a second vertical pipe (22); the outer side of the second vertical pipe (22) is sleeved with a first spring (23); the upper end of the first spring (23) is fixedly connected to an end of the first vertical pipe (21) away from the air inlet (11); the lower end of the first spring (23) is fixedly connected to a fixing ring (24); the fixing ring (24) is fixedly connected to the second vertical pipe (22); an annular filter screen (25) is installed below the second vertical pipe (22); the annular filter screen (25) is rotatably connected to the processing box (1) The inner side of the annular filter (25) is meshedly connected with a second gear (26), the second gear (26) is rotatably connected to the mounting plate (13), the outer side of the second gear (26) is meshedly connected with a first gear (27), the top of the first gear (27) is fixedly connected with a transmission column (28), the top upper surface of the processing box (1) is fixedly connected with a first motor (29), one end of the transmission column (28) away from the first gear (27) is fixedly connected to the output shaft of the first motor (29), the lower surface of the mounting plate (13) is located below the second vertical pipe (22) and is fixedly connected with a third vertical pipe (210), one of the circular holes (7) is connected to the third vertical pipe (210); The end of the surface of the transmission column (28) close to the first gear (27) is fixedly connected to the first bevel gear (211), the outer side of the first bevel gear (211) is meshingly connected to the second bevel gear (212), the surface of the second bevel gear (212) is fixedly connected to the first rotating column (213), the end of the first rotating column (213) away from the second bevel gear (212) is slidably connected to the second rotating column (214), the surface of the second rotating column (214) is fixedly connected to an annular block (215), the surface of the annular block (215) is fixedly connected to a second spring (216), the second spring (216) is sleeved on the outer side of the second rotating column (214), and the second spring (216) is away from the annular block. One end of the second rotating column (215) is fixedly connected to a rotating ring (217), an L-shaped column (218) is installed on the surface of the second rotating column (214), the rotating ring (217) is rotatably connected to the L-shaped column (218), the L-shaped column (218) is fixedly connected to the processing box (1), a protruding column (219) is symmetrically fixedly connected to the surface of the second rotating column (214) at one end of the second spring (216) away from the annular block (215), an arc block (220) is symmetrically fixedly connected to the surface of the L-shaped column (218), a cleaning brush (221) is fixedly connected to the surface of the second rotating column (214) at one end away from the first rotating column (213), and the cleaning brush (221) is installed in cooperation with the annular filter (25); The stirring mechanism (8) comprises a cylinder (81) fixedly connected below the first gear (27); a lifting cylinder (82) is sleeved on the outer side of the cylinder (81); a connecting ring (83) is fixedly connected to the upper end of the lifting cylinder (82); a ring-shaped evenly distributed plug rods (84) are slidably inserted in the connecting ring (83); the upper ends of a plurality of the plug rods (84) are fixedly connected to the cylinder (81); a plurality of stirring columns (85) are symmetrically fixedly connected to the outer side of the lifting cylinder (82); a discharge hole (86) is opened in the middle of the surface of the second partition plate (5); the discharge hole (86) 86) is fitted with a cover plate (87), and the plurality of cover plates (87) are rotatably connected to the lifting cylinder (82); the lower surface of the second partition plate (5) in the lower position is symmetrically fixedly connected with a vertical column (88); the surface of the vertical column (88) is provided with a column groove (89); the groove wall of the column groove (89) is slidably connected with a T-shaped column (810); the outer side of the T-shaped column (810) is sleeved with a third spring (811); the lower ends of the two T-shaped columns (810) are fixedly connected with a connecting plate (812); the lower end of the lifting cylinder (82) is rotatably connected to the connecting plate (812); An oxygen supplementing pipeline (9) is fixedly connected inside the processing box (1), and a plurality of the first vertical plates (14) are all fixedly connected to the oxygen supplementing pipeline (9).

2. A rare earth calcination tail gas treatment device according to claim 1, characterized in that: A rectangular groove (222) is formed on the end surface of the first rotating column (213) away from the second bevel gear (212), and the second rotating column (214) is slidably connected to the rectangular groove (222).

3. A rare earth calcination tail gas treatment device according to claim 1, characterized in that: The initial states of the first spring (23) and the second spring (216) are both compressed.

4. A rare earth calcination tail gas treatment device according to claim 1, characterized in that: The initial state of the third spring (811) is a stretched state.

5. The rare earth calcination tail gas treatment device according to claim 1, characterized in that: An adjustment rod (813) is fixedly connected to the lower surface of the connection plate (812), and the adjustment rod (813) is slidably connected to the bottom of the processing box (1).

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