Rare earth calcination tail gas treatment device

Abstract

This invention discloses a rare earth calcination tail gas treatment device. The device includes a spraying system containing a sprayer. The sprayer includes an input pipe, a spray nozzle, a gear ring, a rotating impeller, a first gear, and a second gear. The input pipe is configured to input spray liquid into the spray nozzle. Multiple spray nozzles are rotatably connected to the input pipe and arranged in a ring. The first gear is connected to the outer circumference of the spray nozzles. The gear ring is located below the input pipe and on the outer circumference of the ring formed by the spray nozzles. Inner teeth are provided on the inner side of the gear ring, meshing with the first gear. Engaging teeth are provided on the surface of the gear ring away from the input pipe. The rotating impeller is located below the gear ring and is configured to drive the second gear to rotate. The second gear is connected to the rotating impeller and meshes with the engaging teeth, driving the gear ring to rotate. This rare earth calcination tail gas treatment device enables more uniform contact between the rare earth calcination tail gas and the spray liquid.

Description

Technical Field

[0001] This invention relates to a rare earth calcination tail gas treatment device. Background Technology

[0002] Rare earth calcination is the process of decomposing rare earth salts into rare earth oxides at high temperatures. The exhaust gas generated by the thermal decomposition reaction needs to be filtered by a bag filter before being emitted to improve product yield and reduce the concentration of particulate matter in the flue gas. Then, it is sprayed by a spraying device to avoid direct emission of high-temperature gas, which would lead to heat loss and further purify the exhaust gas.

[0003] CN215506204U discloses a treatment device for the tail gas of rare earth calcination. The device includes a tail gas cooling box, a dust filter box, a spray absorption box, and a neutralization and regulating box. A spray pipe is horizontally rotatably arranged inside the spray absorption box. The spray pipe has water outlet holes, and its two ends are connected to a drive motor and a water pump, respectively.

[0004] CN208541954U discloses a spray tower for boiler exhaust gas in rare earth processing. The spray tower includes a tower body. An exhaust port is located at the top of the tower body, and a drain pipe is located at the bottom. Multiple sets of bow-shaped sieve plates are respectively installed on the left and right inner side walls of the spray tower between the spray pipe and the air inlet pipe. A drain pipe is located at the bottom of the spray tower, with one end connected to a backwash water pump. The air inlet pipe, located outside the spray tower, has its feed end bent upwards, and a slanted cut is made in the discharge section of the air inlet pipe inside the spray tower.

[0005] CN205517150U discloses a device for treating tail gas from electrolytic rare earth metal calcination. The device includes an electrolytic furnace, a spiral spray pipe, and spray heads. The tail gas outlet of the electrolytic furnace is connected to the inlet of a cyclone separator via a pipe. The outlet of the cyclone separator is connected to the inlet of an absorption tower via a pipe. A solid particulate matter collection box is connected to the lower part of the cyclone separator. The spiral spray pipe is fixed inside the absorption tower via connectors. Spray heads are installed on the spiral spray pipe. A neutralization liquid tank is located on the right side of the absorption tower. The spiral spray pipe, pump body, and neutralization liquid tank are connected sequentially via pipes. The upper part of the absorption tower is connected to a discharge pipe, and the bottom is connected to a waste liquid tank via a pipe.

[0006] The uniformity of contact between the exhaust gas and the spray liquid in the above-mentioned device needs to be improved, and a good treatment effect cannot be achieved. Summary of the Invention

[0007] In view of this, the object of the present invention is to provide a rare earth calcination tail gas treatment device, which enables more uniform contact between the rare earth calcination tail gas and the spray liquid, thereby improving the treatment effect. Furthermore, this rare earth calcination tail gas treatment device can prevent dust in the recycled spray liquid from clogging the equipment. Even further, this rare earth calcination tail gas treatment device can reduce the amount of dust in the recycled spray liquid. The above objectives are achieved through the following technical solutions.

[0008] This invention provides a rare earth calcination tail gas treatment device, which includes a spraying device, wherein a sprayer is provided inside the spraying device;

[0009] The sprayer includes an inlet pipe, a spray pipe, a gear ring, a rotating impeller, a first gear, and a second gear;

[0010] The input pipe is configured to input spray liquid into the nozzle;

[0011] The spray nozzles are configured in multiple ways and are rotatably connected to the input pipe. The spray nozzles are arranged in a ring shape. The spray nozzles are configured to spray spray liquid into the spraying equipment.

[0012] The first gear is connected to the outer periphery of the nozzle;

[0013] The toothed ring is disposed below the input pipe and on the outer periphery of the ring formed by the nozzle; the inner side of the toothed ring is provided with inner ring teeth, which mesh with the first gear; the surface of the toothed ring away from the input pipe is provided with meshing teeth.

[0014] The rotating impeller is disposed below the gear ring, and the rotating impeller is configured to drive the second gear to rotate;

[0015] The second gear is connected to the rotating impeller and meshes with the meshing teeth. The second gear is configured to drive the gear ring to rotate.

[0016] In the rare earth calcination tail gas treatment device according to the present invention, preferably, the outer surface of the nozzle is connected with a baffle blade.

[0017] According to the rare earth calcination tail gas treatment device of the present invention, preferably, the nozzle has a downwardly opening liquid outlet; the turbulence vanes are configured as at least two, and the turbulence vanes are dispersedly arranged near the liquid outlet.

[0018] According to the rare earth calcination tail gas treatment device of the present invention, preferably, the rare earth calcination tail gas treatment device further includes a liquid suction assembly, the liquid suction assembly including a sliding cylinder, a sliding rod and a liquid suction pipe;

[0019] One end of the suction tube is connected to the input tube, and the other end of the suction tube is provided with a liquid inlet. At least a portion of the suction tube is formed of a flexible material, and the suction tube is configured to deliver spray liquid to the input tube.

[0020] One end of the slide rod is connected to the end of the suction tube that has a liquid inlet;

[0021] The cylinder is filled with a thermally expanding material, and the cylinder is connected to the end of the slide rod away from the suction tube; the thermally expanding material is configured to control the extension and retraction of the slide rod through changes in volume.

[0022] In the rare earth calcination tail gas treatment device according to the present invention, preferably, a water pump is provided on the liquid suction pipe.

[0023] According to the rare earth calcination tail gas treatment device of the present invention, preferably, the lower part of the spraying device is provided with a tail gas inlet, and the tail gas inlet is configured to allow the tail gas to be treated to enter the spraying device.

[0024] The top of the spraying equipment is provided with an exhaust gas outlet, which is configured to allow the exhaust gas after contact with the spraying liquid to be discharged from the spraying equipment.

[0025] The bottom of the spraying equipment is provided with a spray liquid outlet, which is configured to discharge the spray liquid that has come into contact with the exhaust gas from the spraying equipment.

[0026] According to the rare earth calcination tail gas treatment device of the present invention, preferably, the rare earth calcination tail gas treatment device further includes a liquid storage device;

[0027] The liquid storage device has an opening at the top, which is located below the spraying device; the slide cylinder is fixed inside the liquid storage device, and the liquid storage device is configured to store spraying liquid.

[0028] According to the rare earth calcination tail gas treatment device of the present invention, preferably, the rare earth calcination tail gas treatment device further includes a dust removal component, the dust removal component includes a first drive shaft, a second drive shaft and a dust removal cloth;

[0029] The first drive shaft is positioned above the edge A of the top opening of the liquid storage device;

[0030] The second drive shaft is disposed above side B of the top opening of the liquid storage device; side A and side B are disposed opposite to each other;

[0031] The first and second drive shafts are configured to support the dust removal cloth and drive the dust removal cloth to move.

[0032] The dust removal cloth comprises a first part, a second part, a third part, and a fourth part connected in sequence;

[0033] The first portion covers at least a portion of the first drive shaft;

[0034] The second part covers at least a portion of the inner surface of the side wall of the liquid storage device near the first drive shaft, at least a portion of the inner surface of the bottom surface of the liquid storage device, and at least a portion of the inner surface of the side wall of the liquid storage device near the second drive shaft.

[0035] The third part covers at least a portion of the second drive shaft;

[0036] The fourth part covers at least a portion of the outer surface of the side wall of the liquid storage device near the first drive shaft, at least a portion of the outer surface of the bottom surface of the liquid storage device, and at least a portion of the outer surface of the side wall of the liquid storage device near the second drive shaft;

[0037] The dust removal cloth is configured to remove dust from the spray liquid in the liquid storage device.

[0038] According to the rare earth calcination tail gas treatment device of the present invention, preferably, the dust removal component further includes a wiping roller and a drive motor;

[0039] The wiping roller is disposed at the bottom of the liquid storage device and contacts the surface of the dust removal cloth away from the liquid storage device; the wiping roller is configured to remove dust from the dust removal cloth.

[0040] The drive motor is connected to the first transmission shaft, and the drive motor is connected to the wiping roller through a transmission component.

[0041] According to the rare earth calcination tail gas treatment device of the present invention, preferably, the surface of the dust removal cloth away from the liquid storage device is provided with flexible protrusions, the flexible protrusions being configured to intercept dust in the spray liquid.

[0042] The rare earth calcination tail gas treatment device of the present invention enables more uniform contact between the tail gas and the spray liquid. Furthermore, it can prevent dust in the recycled spray liquid from clogging the equipment. Even further, it can reduce the amount of dust in the recycled spray liquid. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of a rare earth calcination tail gas treatment device according to the present invention.

[0044] Figure 2 for Figure 1 The diagram shows a partial structural schematic of a rare earth calcination tail gas treatment device.

[0045] Figure 3 for Figure 1 A partial structural diagram of the sprayer and liquid suction assembly of a rare earth calcination tail gas treatment device.

[0046] Figure 4 for Figure 3 Side view of the structure shown.

[0047] Figure 5 This is a schematic diagram of a partial structure of the dust removal cloth.

[0048] The detailed labeling in the attached figures is as follows:

[0049] 1-Spraying equipment; 11-Exhaust gas inlet; 12-Exhaust gas outlet; 13-Spray liquid outlet; 14-Sprayer; 141-Input pipe; 142-Spray nozzle; 1421-Baffle blade; 143-Gear ring; 144-Rotating impeller; 145-First gear; 146-Second gear; 147-Connecting pipe; 2-Liquid storage device; 3-Liquid suction assembly; 31-Slide cylinder; 32-Slide rod; 33-Liquid suction pipe; 331-Water pump; 332-Liquid inlet; 4-Dust removal assembly; 41-First drive shaft; 42-Second drive shaft; 43-Dust removal cloth; 431-Flexible protrusion; 44-Wiping roller; 45-Transmission component; 46-Drive motor. Detailed Implementation

[0050] The present invention will be further described below with reference to specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0051] The rare earth calcination tail gas treatment device of the present invention includes a spraying device. It may also include one or more of a liquid storage device, a liquid suction component, and a dust removal component.

[0052] <Spraying Equipment>

[0053] The spraying equipment has an exhaust gas inlet. The exhaust gas inlet can be located on the side wall of the spraying equipment; preferably, it is located on the lower part of the side wall. The exhaust gas inlet allows the exhaust gas to be treated to enter the spraying equipment.

[0054] The spraying equipment has an exhaust gas outlet. The exhaust gas outlet can be located at the top of the spraying equipment. The exhaust gas outlet allows the exhaust gas that has come into contact with the spraying liquid to be discharged from the spraying equipment.

[0055] The spraying equipment has a spray liquid discharge port. The spray liquid discharge port can be located at the bottom of the spraying equipment. The spray liquid discharge port discharges the spray liquid that has come into contact with the exhaust gas from the spraying equipment.

[0056] The spraying equipment is equipped with a sprayer. The sprayer includes an inlet pipe, a spray nozzle, a gear ring, a rotating impeller, a first gear, and a second gear.

[0057] The inlet pipe is designed to input spray liquid into the nozzle. The inlet pipe can be annular. A connecting pipe can be connected to the inside of the inlet pipe. The connecting pipe can be rotatably connected to the nozzle. Multiple connecting pipes can be used. The number of connecting pipes can be the same as the number of nozzles. The multiple connecting pipes can be evenly distributed inside the inlet pipe.

[0058] The nozzle is rotatably connected to the input pipe; preferably, the nozzle is rotatably connected to the input pipe via a connecting pipe. The nozzle is configured to spray spray liquid into the spraying equipment. The nozzle may have a downward-facing liquid outlet. Multiple nozzles are configured. The multiple nozzles are arranged in a ring.

[0059] The deflector blades are connected to the outer surface of the nozzle. Each nozzle is connected to at least two deflector blades. Multiple deflector blades can be evenly distributed on the outer surface of the nozzle. Multiple deflector blades can be grouped into two groups, with the two deflector blades in each group arranged opposite each other. Preferably, the two deflector blades in each group are arranged in a figure-eight pattern.

[0060] The first gear is connected to the outer periphery of the nozzle. Multiple first gears can be configured. The number of first gears can be the same as the number of nozzles.

[0061] The gear ring is positioned below the input pipe and on the outer periphery of the annular shape formed by the nozzle. Inner teeth are provided on the inner side of the gear ring, meshing with the first gear. During rotation, the inner teeth drive the first gears to rotate, thus causing the nozzle to rotate. Engaging teeth are provided on the surface of the gear ring away from the input pipe, meshing with the second gear.

[0062] The rotating impeller is positioned below the gear ring. The rotating impeller is positioned above the exhaust gas inlet. The rotating impeller can also be positioned near the exhaust gas inlet. The rotating impeller can be connected to the spraying equipment via a connecting shaft. As the hot exhaust gas rises, it drives the rotating impeller to rotate, which in turn drives the second gear to rotate.

[0063] The second gear is connected to the rotating impeller. The second gear can be connected to the rotating impeller via a connecting shaft. The second gear meshes with the meshing teeth. The second gear drives the gear ring to rotate.

[0064] <Liquid Storage Equipment>

[0065] A liquid storage device is located below the spraying equipment. The storage device is designed to store the spraying liquid. The top of the storage device has an opening. The spraying liquid enters the storage device through this top opening.

[0066] The liquid storage device has a first sidewall, a second sidewall, and a bottom surface. The first sidewall and the second sidewall are arranged opposite to each other.

[0067] <Liquid Absorption Component>

[0068] The liquid suction assembly includes a slide cylinder, a slide rod, and a suction tube.

[0069] The slide cylinder is fixed inside the liquid storage device. Specifically, the slide cylinder can be connected to the inner wall of the liquid storage device. The slide cylinder is filled with a thermally expanding material. The thermally expanding material can control the extension and retraction of the slide rod through changes in volume.

[0070] The slide rod is slidably connected to the cylinder.

[0071] One end of the suction tube is connected to the input tube. The other end of the suction tube is provided with a liquid inlet. The end of the suction tube with the liquid inlet is connected to a slide rod. At least a portion of the suction tube is formed of a flexible material. The suction tube is configured to deliver spray liquid to the input tube. A water pump may be provided on the suction tube. According to one embodiment of the invention, the portion of the suction tube with the liquid inlet is formed of a rigid material. The portion of the suction tube between the liquid inlet and the water pump is formed of a flexible material. The portion of the suction tube between the water pump and the input tube is formed of a rigid material.

[0072] <Dust Removal Components>

[0073] The dust removal assembly includes a first drive shaft, a second drive shaft, and a dust removal cloth. In some embodiments, it may also include a wiping roller and a drive motor.

[0074] A first drive shaft is disposed above edge A of the top opening of the liquid storage device. A second drive shaft is disposed above edge B of the top opening of the liquid storage device. Edges A and B are disposed opposite to each other. According to one embodiment of the present invention, the first drive shaft is disposed above the upper edge of the first sidewall. The second drive shaft is disposed above the upper edge of the second sidewall. The first and second drive shafts are configured to support the dust removal cloth and drive the dust removal cloth to move.

[0075] The dust collection cloth comprises a first part, a second part, a third part, and a fourth part connected in sequence. The first part covers at least a portion of the first drive shaft. The second part covers at least a portion of the inner surface of the side wall of the liquid storage device near the first drive shaft, at least a portion of the inner surface of the bottom surface of the liquid storage device, and at least a portion of the inner surface of the side wall of the liquid storage device near the second drive shaft. The third part covers at least a portion of the second drive shaft. The fourth part covers at least a portion of the outer surface of the side wall of the liquid storage device near the first drive shaft, at least a portion of the outer surface of the bottom surface of the liquid storage device, and at least a portion of the outer surface of the side wall of the liquid storage device near the second drive shaft. The side wall of the liquid storage device near the first drive shaft can be a first side wall. The side wall of the liquid storage device near the second drive shaft can be a second side wall.

[0076] Flexible protrusions can be provided on the surface of the dust collection cloth away from the liquid storage device. These flexible protrusions are designed to intercept dust from the spray liquid. Multiple flexible protrusions can be provided, and they can be spaced equidistantly.

[0077] A first sprocket can be installed on the outer wall of the first drive shaft. A second sprocket can be installed on the outer wall of the second drive shaft. A chain that cooperates with the first and second sprockets can be installed on the surface of the dust removal cloth near the liquid storage device. This helps the first and second drive shafts to transmit the dust removal cloth more smoothly.

[0078] The wiping roller is positioned at the bottom of the liquid storage device and contacts the surface of the dust removal cloth away from the liquid storage device. The wiping roller is designed to remove dust from the dust removal cloth.

[0079] A drive motor is connected to a first transmission shaft. According to one embodiment of the invention, the shaft end of the drive motor is connected to the first transmission shaft. The drive motor is capable of driving the first transmission shaft to move.

[0080] The drive motor is connected to the wiping roller via a transmission component. The drive motor can drive the wiping roller to move. Specifically, a first pulley is provided at the shaft end of the drive motor. A second pulley is connected to the wiping roller. One end of the belt is sleeved on the outer circumference of the first pulley, and the other end of the belt is sleeved on the outer circumference of the second pulley.

[0081] The dust removal assembly of the present invention may further include a second drive motor. The second drive motor is connected to a second transmission shaft. The second drive motor is configured to drive the second transmission shaft to move.

[0082] Example 1

[0083] like Figure 1 As shown, the rare earth calcination tail gas treatment device of the present invention includes a spraying device 1, a liquid storage device 2, a liquid suction component 3, and a dust removal component 4.

[0084] The lower part of the side wall of the spraying device 1 is provided with an exhaust gas inlet 11. The exhaust gas inlet 11 allows the exhaust gas to be treated to enter the spraying device 1.

[0085] The spraying device 1 is provided with an exhaust gas outlet 12 at the top. The exhaust gas outlet 12 allows the exhaust gas after contact with the spraying liquid to be discharged from the spraying device 1.

[0086] The bottom of the spraying device 1 is provided with a spray liquid outlet 13. The spray liquid outlet 13 discharges the spray liquid after it comes into contact with the exhaust gas from the spraying device 1.

[0087] The sprinkler system 1 is equipped with a sprinkler 14 inside. For example... Figure 3 and 4 As shown, the sprayer 14 includes an input pipe 141, a spray pipe 142, a gear ring 143, a rotating impeller 144, a first gear 145, and a second gear 146.

[0088] The input pipe 141 is annular. The input pipe 141 inputs spray liquid into the nozzle 142. Multiple connecting pipes 147 are evenly distributed on the inner side of the input pipe 141.

[0089] Multiple nozzles 142 are provided. Each nozzle 142 is rotatably connected to a connecting pipe 147. Each nozzle 142 has a downward-facing liquid outlet. The multiple nozzles 142 are arranged in a ring. The nozzles 142 spray spray liquid into the spraying device 1. A baffle vane 1421 is provided at the end of each nozzle 142 near the liquid outlet. Each nozzle 142 may have two baffle vanes 1421 arranged opposite each other. The two baffle vanes 1421 are arranged in a figure-eight pattern.

[0090] Multiple first gears 145 are provided. The first gears 145 are connected to the outer periphery of the nozzle 142. The number of first gears 145 can be the same as the number of nozzles 142.

[0091] A toothed ring 143 is disposed below the input pipe 141 and on the outer periphery of the annular shape formed by the nozzle 142. Inner teeth are provided on the inner side of the toothed ring 143. These inner teeth mesh with the first gears 145. During rotation, the inner teeth of the toothed ring 143 drive the first gears 145 to rotate, thereby causing the nozzle 142 to rotate. Engaging teeth are provided on the surface of the toothed ring 143 away from the input pipe 141.

[0092] The rotating impeller 144 is positioned below the gear ring 143 and above the exhaust gas inlet 11. The rotating impeller 144 is located close to the exhaust gas inlet 11. The rotating impeller 144 is connected to the inner wall of the spraying device 1 via a connecting shaft. The rotating impeller 144 drives the second gear 146 to rotate.

[0093] The second gear 146 is connected to the rotating impeller 144 via a connecting shaft. The second gear 146 meshes with the meshing teeth. The second gear 146 drives the gear ring 143 to rotate.

[0094] Spraying equipment 1 can be a spraying tower.

[0095] A liquid storage device 2 is disposed below the spraying device 1. The liquid storage device 2 stores the spraying liquid. The top of the liquid storage device 2 has an opening through which the spraying liquid enters. The liquid storage device 2 has a first sidewall, a second sidewall, and a bottom surface. The first sidewall and the second sidewall are arranged opposite each other.

[0096] The liquid suction assembly 3 transports the spray liquid in the liquid storage device 2 to the sprayer 14. The liquid suction assembly 3 includes a slide cylinder 31, a slide rod 32, and a liquid suction pipe 33.

[0097] The slide cylinder 31 is installed in the liquid storage device 2 and is connected to the inner wall of the liquid storage device 2. The slide cylinder 31 is filled with a thermally expanding material.

[0098] The slide rod 32 is slidably connected to the inner wall of the cylinder 31. The extension and retraction of the slide rod 32 can be controlled by the volume change of the thermally expanding material.

[0099] One end of the suction tube 33 is provided with a liquid inlet 332. The end of the suction tube 33 with the liquid inlet is connected to the slide rod 32. The other end of the suction tube 33 is connected to the input pipe 141. A water pump 331 can be installed on the suction tube 33. The portion of the suction tube 33 with the liquid inlet is formed of a rigid material. The portion of the suction tube 33 between the liquid inlet and the water pump is formed of a flexible material. The portion of the suction tube 33 between the water pump and the input pipe 141 is formed of a rigid material.

[0100] like Figure 1 and 2 As shown, the dust removal assembly 4 includes a first drive shaft 41, a second drive shaft 42, a dust removal cloth 43, a wiping roller 44, a transmission component 45, and a drive motor 46.

[0101] The first drive shaft 41 is located above the upper part of the first side wall. The second drive shaft 42 is located above the upper part of the second side wall. The first drive shaft 41 and the second drive shaft 42 support the dust removal cloth 43 and drive the dust removal cloth 43 to move.

[0102] The dust removal cloth 43 comprises a first part, a second part, a third part, and a fourth part connected in sequence. The first part covers at least a portion of the first drive shaft 41. The second part covers at least a portion of the inner surface of the first sidewall, at least a portion of the inner surface of the bottom surface, and at least a portion of the inner surface of the second sidewall. The third part covers at least a portion of the second drive shaft 42. The fourth part covers at least a portion of the outer surface of the first sidewall, at least a portion of the outer surface of the bottom surface, and at least a portion of the outer surface of the second sidewall. The dust removal cloth 43 removes dust from the spray liquid in the liquid storage device 2.

[0103] The wiping roller 44 is disposed at the bottom of the liquid storage device 2 and is in contact with the surface of the dust removal cloth 43 away from the liquid storage device 2. The wiping roller 44 removes dust from the dust removal cloth 43.

[0104] The transmission component 45 includes a first pulley, a belt, and a second pulley.

[0105] The shaft end of the drive motor 46 is connected to the first transmission shaft 41, thereby driving the first transmission shaft 41 to move.

[0106] A first pulley is provided at the shaft end of the drive motor 46. A second pulley is connected to the wiping roller 44. One end of the belt is sleeved on the outer circumference of the first pulley, and the other end of the belt is sleeved on the outer circumference of the second pulley. The drive motor 46 drives the wiping roller 44 to rotate through the transmission component 45.

[0107] Example 2

[0108] Except for the following structure, the rest is the same as in Example 1:

[0109] likeFigure 5 As shown, flexible protrusions 431 are equidistantly arranged on the surface of the dust removal cloth 43 away from the liquid storage device 2. The flexible protrusions 431 intercept dust in the spray liquid.

[0110] Example 3

[0111] Except for the following structure, the rest is the same as in Example 2:

[0112] A first sprocket is provided on the outer wall of the first drive shaft 41. A second sprocket is provided on the outer wall of the second drive shaft 42.

[0113] The surface of the dust removal cloth 43 near the liquid storage device 2 is provided with a chain that cooperates with the first sprocket and the second sprocket.

[0114] During operation, the exhaust gas to be treated enters the spraying device 1 through the exhaust gas inlet 11. As the exhaust gas rises, it drives the rotating impeller 144 to rotate, which in turn drives the second gear 146 to rotate via a connecting shaft. The second gear 146 meshes with the meshing teeth on the gear ring 143, thereby driving the gear ring 143 to rotate. The gear ring 143, through its inner ring teeth, drives the first gear 145 to rotate, thus causing the spray nozzle 142 to rotate. This allows for more uniform spraying of the spray liquid, thereby improving the uniformity of the mixture between the spray liquid and the exhaust gas.

[0115] The rotation of the nozzle 142 drives the deflector blades 1421 mounted on the nozzle 142 to rotate. The deflector blades 1421 enable the exhaust gas to be distributed more evenly, thereby improving the uniformity of the mixture between the spray liquid and the exhaust gas.

[0116] The spray liquid discharged from outlet 13 falls into storage tank 2. The falling spray liquid contains a certain amount of dust, which increases the dust content in storage tank 2; furthermore, the falling spray liquid absorbs heat from the exhaust gas, raising the temperature of the spray liquid in storage tank 2. Therefore, the dust content in storage tank 2 is directly proportional to the temperature of the spray liquid. When the temperature of the spray liquid in storage tank 2 rises, the thermal expansion material in the slide cylinder 31 expands, pushing the slide rod 32 upwards, which in turn causes the liquid inlet of the absorption pipe 33 to move upwards, and the flexible material portion of the absorption pipe 33 to contract. This allows spray liquid with a higher total liquid level and lower dust content in storage tank 2 to enter the absorption pipe 33, reducing the occurrence of equipment blockage.

[0117] Dust-collecting cloth 43 adsorbs dust from the spray liquid in the liquid storage device 2. Driven by the first drive shaft 41 and the second drive shaft 42, the dust-collecting cloth 43 moves out of the liquid storage device 2. The wiping roller 44 removes the dust from the dust-collecting cloth 43. Driven by the first drive shaft 41 and the second drive shaft 42, the dust-collecting cloth 43 re-enters the liquid storage device 2 to adsorb dust from the spray liquid.

[0118] This invention is not limited to the above-described embodiments. Any modifications, improvements, or substitutions that can be conceived by those skilled in the art without departing from the essential content of this invention fall within the scope of this invention.

Claims

1. A rare earth calcination off-gas treatment device, characterized by, The rare earth calcination tail gas treatment device comprises a spraying device and a liquid suction assembly; The spraying device is provided with a sprayer; The sprayer comprises an input pipe, a spray pipe, a tooth ring, a rotating impeller, a first gear and a second gear; The input pipe is arranged to input spraying liquid to the spray pipe; The spray pipe is arranged in multiple, rotationally connected with the input pipe, and arranged in a ring shape; the spray pipe is arranged to spray spraying liquid into the spraying device; The first gear is connected with the outer periphery of the spray pipe; The tooth ring is arranged below the input pipe and at the outer periphery of the ring formed by the spray pipe; the inner side of the tooth ring is provided with inner ring teeth, which are engaged with the first gear; the surface of the tooth ring away from the input pipe is provided with engagement teeth; The rotating impeller is arranged below the tooth ring, and the rotating impeller is arranged to drive the second gear to rotate; The second gear is connected with the rotating impeller and engaged with the engagement teeth, and the second gear is arranged to drive the tooth ring to rotate; The liquid suction assembly comprises a sliding cylinder, a sliding rod and a liquid suction pipe; One end of the liquid suction pipe is connected with the input pipe, the other end of the liquid suction pipe is provided with a liquid inlet, at least a part of the liquid suction pipe is formed of flexible material, and the liquid suction pipe is arranged to deliver spraying liquid to the input pipe; One end of the sliding rod is connected with the end of the liquid suction pipe provided with the liquid inlet; The sliding cylinder is filled with thermal expansion material, and the sliding cylinder is connected with the end of the sliding rod away from the liquid suction pipe; the thermal expansion material is arranged to control the expansion and contraction of the sliding rod through volume change.

2. The rare earth calciner off-gas treatment device of claim 1, wherein, The outer surface of the spray pipe is connected with a turbulence vane.

3. The rare earth calciner off-gas treatment device of claim 2, wherein, The spray pipe has a liquid outlet opening downward; the turbulence vane is arranged in at least two, and the turbulence vanes are dispersedly arranged near the liquid outlet.

4. The rare earth calciner off-gas treatment device of claim 1, wherein, A water pump is arranged on the liquid suction pipe.

5. The rare earth calcination tail gas treatment device according to claim 1, wherein: The lower part of the spraying device is provided with a tail gas inlet, which is arranged to enable the tail gas to be treated to enter the spraying device; The top of the spraying device is provided with a tail gas outlet, which is arranged to enable the tail gas after contacting with the spraying liquid to be discharged from the spraying device; The bottom of the spraying device is provided with a spraying liquid discharge outlet, which is arranged to enable the spraying liquid after contacting with the tail gas to be discharged from the spraying device.

6. The rare earth calciner off-gas treatment device of claim 1, wherein, The rare earth calcination tail gas treatment device further comprises a liquid storage device; The top of the liquid storage device has an opening, which is arranged below the spraying device; the sliding cylinder is fixed in the liquid storage device, and the liquid storage device is arranged to store the spraying liquid.

7. The rare earth calciner off-gas treatment device of claim 6, wherein, The rare earth calcination tail gas treatment device further comprises a dust removal assembly, and the dust removal assembly comprises a first transmission shaft, a second transmission shaft and a dust removal cloth; The first transmission shaft is arranged above the edge A of the top opening of the liquid storage device; The second transmission shaft is arranged above the edge B of the top opening of the liquid storage device; the edge A and the edge B are oppositely arranged; The first transmission shaft and the second transmission shaft are arranged to support and drive the movement of the dust removal cloth; The dust removal cloth comprises a first part, a second part, a third part and a fourth part connected in sequence; The first part covers at least a part of the first transmission shaft; The second part covers at least a part of the inner surface of the side wall of the liquid storage device close to the first transmission shaft, at least a part of the inner surface of the bottom of the liquid storage device, and at least a part of the inner surface of the side wall of the liquid storage device close to the second transmission shaft; The third part covers at least a part of the second transmission shaft; The fourth part covers at least a part of the outer surface of the side wall of the liquid storage device close to the first transmission shaft, at least a part of the outer surface of the bottom of the liquid storage device, and at least a part of the outer surface of the side wall of the liquid storage device close to the second transmission shaft; The dust removal cloth is arranged to remove dust in the spraying liquid in the liquid storage device.

8. The rare earth calciner off-gas treatment device of claim 7, wherein, The dust removal assembly further comprises a wiping roller and a driving motor; The wiping roller is arranged on the bottom of the liquid storage device and is in contact with the surface of the dust removal cloth away from the liquid storage device; the wiping roller is arranged to remove dust on the dust removal cloth; The driving motor is connected with the first transmission shaft, and the driving motor is connected with the wiping roller through a transmission component.

9. The rare earth calciner off-gas treatment device of claim 7, wherein, The surface of the dust removal cloth away from the liquid storage device is provided with a flexible protrusion arranged to intercept dust in the spraying liquid.

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