Lithium ore roasting rotary kiln

Abstract

The application discloses a lithium ore roasting rotary kiln and belongs to the technical field of rotary kilns. The lithium ore roasting rotary kiln comprises a kiln body, a reaction tower for purifying flue gas is communicated with an exhaust pipe of the kiln body, the reaction tower comprises a tower body and a spraying pipe arranged at the top of the tower body, the spraying pipe is used for spraying alkaline liquid to filter dust and harmful substances in the flue gas and neutralize the acid; the kiln body is provided with a cooling pipe, flue gas generated by the kiln body is discharged into the tower body through the exhaust pipe and an air inlet pipe, the flue gas rises and floats, first contacts the cooling pipe, low-temperature water circulating in the cooling pipe exchanges heat with the flue gas, the temperature of the flue gas is reduced to a reaction temperature range, meanwhile, the water after heat exchange can be used in other processes, and the cooling pipe can reduce the flow rate of the flue gas, improve the contact area of the flue gas and the alkaline water mist, make the flue gas fully react with the alkaline water mist, and neutralize the acid.

Description

Technical Field

[0001] This invention relates to the field of rotary kiln technology, and more particularly to a rotary kiln for roasting lithium ore. Background Technology

[0002] Rotary kilns can be classified into cement kilns, metallurgical and chemical kilns, and lime kilns according to the materials they process. Metallurgical and chemical kilns are mainly used in the metallurgical industry for magnetizing roasting of lean iron ore in steel plants; oxidizing roasting of chromium and nickel iron ore; and roasting of lithium ore. Rotary kilns belong to the category of metallurgical and chemical kilns. Rotary kilns are also called rotary calcining kilns, commonly known as rotary kilns. Through the rotation process, the fuel is fully combusted, and the process includes gas flow, fuel combustion, heat transfer, and material movement. Rotary kilns produce flue gas during lithium ore roasting. Direct emission of this flue gas can pollute the environment. To meet emission standards, the flue gas undergoes a series of treatments. In existing technologies, reaction towers are typically used to treat the flue gas from rotary kilns. The flue gas produced during lithium ore roasting usually contains harmful substances such as fluorides and sulfur oxides. Alkaline liquid needs to be sprayed into the reaction tower for chemical reaction treatment. The reaction temperature between the alkaline liquid and the flue gas needs to be in the range of 300-450 degrees Celsius. However, the temperature of the flue gas produced by rotary kilns during lithium ore roasting is usually 700-900 degrees Celsius. The excessively high temperature of the flue gas affects the treatment effect. Summary of the Invention

[0003] The purpose of this invention is to solve the problem of the influence of flue gas temperature on the reaction effect in the prior art, and to propose a rotary kiln for lithium ore roasting.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A rotary kiln for roasting lithium ore includes a kiln body. The exhaust pipe of the kiln body is connected to a reaction tower for purifying flue gas. The reaction tower includes a tower body and a spray pipe installed at the top of the tower body. The spray pipe is used to spray alkaline liquid to filter and neutralize dust and harmful substances in the flue gas. A cooling component for reducing the temperature of the flue gas to the temperature required for the reaction is connected to the middle of the tower body. The surface of the cooling component is provided with a cleaning component for cleaning the cooling pipe.

[0005] In some embodiments, the cooling assembly includes a box body that is fixed in communication with the tower body and a cooling pipe disposed inside the box body. Two partitions are symmetrically fixed to the inner wall of the box body, and the two partitions are located on both sides of the tower body. The cooling pipe is fixed to the surface of the two partitions in a serpentine manner.

[0006] In some embodiments, a plurality of packing rings are stacked above the uppermost cooling tube. The packing rings are used to increase the reaction time between the alkaline liquid and the flue gas, and the gaps between the cooling tubes are smaller than the diameter of the packing rings.

[0007] In some embodiments, the cleaning assembly includes a scraper that slides laterally across a plurality of straight sections of cooling pipes and a lifting plate fixed to the upper end of the scraper. The scraper slides on the surface of the cooling pipes via a transmission assembly, and the upper surface of the lifting plate is inverted V-shaped.

[0008] In some embodiments, multiple sets of cleaning components are symmetrically arranged on the lower surface of the lifting plate. The multiple sets of cleaning components are located on both sides of the scraper and between multiple cooling tubes. The cleaning components include an inclined plate for cleaning the packing ring from between the cooling tubes and a moving block for sliding the inclined plate.

[0009] In some embodiments, the moving block slides on the lower surface of the lifting plate, and the upper end of the inclined plate is hinged to the surface of the moving block via a pivot. The surface of the pivot is fitted with a torsion spring for driving the lower end of the inclined plate to tilt away from the scraper.

[0010] In some embodiments, the tower body is provided with a disturbance component for agitating the packing rings. The disturbance component includes a connecting shaft fixed at the junction of the box body and the tower body and a plurality of disturbance plates rotating on the surface of the connecting shaft. The plurality of disturbance plates are all located at the same height as the plurality of packing rings. The middle part of the two disturbance plates located below is fixed with a lever, and the upper end of the lever is flush with the adjacent upper disturbance plate.

[0011] In some embodiments, the bottommost disturbance plate is driven to rotate by a gear and a rack, the gear being fixed to the bottom of the bottommost disturbance plate, the gear axis coinciding with the axis of the connecting shaft, and the rack being fixed to the upper surface of the lifting plate.

[0012] In some embodiments, the scraper surface is fixed with multiple sets of corner cleaning components for cleaning the junction of the cooling tube and the baffle. The corner cleaning component includes a fixing ring fixed on the scraper surface and a cleaning tube disposed inside the fixing ring. The fixing ring and the cooling tube are coaxially arranged. The cleaning tube slides on the surface of the cooling tube. The two ends of the cleaning tube are respectively located on both sides of the scraper. Multiple breaking teeth are fixed at both ends of the cleaning tube.

[0013] In some embodiments, the cleaning tube slides on the inner wall of the fixing ring, the surface of the cleaning tube is provided with a spiral guide ridge, and the two ends of the cleaning tube are respectively provided with retaining rings. The retaining rings are fixed on the surfaces of multiple crushing teeth, and a second spring is provided between one of the retaining rings and the scraper. The second spring is sleeved on the surface of the cleaning tube.

[0014] Compared with the prior art, the present invention provides a rotary kiln for roasting lithium ore, which has the following beneficial effects.

[0015] 1. This invention, by installing a cooling pipe inside the tower, allows the flue gas generated by the kiln to enter the tower through the exhaust pipe and the inlet pipe. The flue gas rises and floats, first contacting the cooling pipe. The low-temperature water circulating inside the cooling pipe exchanges heat with the flue gas, reducing the temperature of the flue gas to the reaction temperature range. At the same time, the water, after absorbing heat after heat exchange, can be used in other processes. Furthermore, the cooling pipe can reduce the flow rate of the flue gas, increase the contact area between the flue gas and the alkaline water mist, and allow the flue gas to fully react chemically with the alkaline water mist, neutralizing the acidity.

[0016] 2. In this invention, by setting up a cleaning component, when it is necessary to clean the cooling tube, two threaded columns drive a scraper to move on the surface of the cooling tube, thereby cleaning the scale on the surface of the cooling tube and avoiding affecting the heat exchange efficiency. By setting up a corner cleaning component, when the scraper drives the corner cleaning component to approach the partition, the cleaning tube drives multiple crushing teeth and multiple crushing rods to crush the annular scale, causing it to fall off the surface of the cooling tube, thus achieving the purpose of cleaning the scale at the junction of the cooling tube and the partition. 3. In this invention, by setting up a disturbance component, while the scraper cleans the cooling tube, the rack drives the gear and the bottom disturbance plate to rotate. After the bottom disturbance plate rotates a certain distance, the paddle then drives the adjacent upper disturbance plate to rotate, thereby causing multiple disturbance plates to rotate sequentially from bottom to top. This causes the disturbance plates to agitate the packing rings, separating the scale between the packing rings from the packing rings, thus avoiding excessive scale buildup that affects the ventilation effect and reducing the number of manual maintenance operations.

[0017] Other advantages, objectives and features of the invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be learned from practice of the invention. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the reaction tower structure of the present invention.

[0020] Figure 3 This is a partial cross-sectional structural diagram of the reaction tower in this invention.

[0021] Figure 4 This is a cross-sectional structural diagram of the cooling component in this invention.

[0022] Figure 5 This is a schematic diagram of the cleaning component in this invention.

[0023] Figure 6 This is a schematic diagram of the usage state structure of the cleaning component in this invention.

[0024] Figure 7 This is a schematic diagram of the seam cleaning component in this invention.

[0025] Figure 8 This is a cross-sectional structural diagram of the box body in this invention.

[0026] Figure 9 This is a schematic diagram of the disturbance component in this invention.

[0027] Figure 10 This is a schematic diagram of the corner clearing component in this invention.

[0028] Figure 11 This is an exploded view of the corner clearing component in this invention.

[0029] In the picture: 1. Kiln body; 2. Reaction tower; 201. Tower body; 202. Air inlet pipe; 203. Spray pipe; 3. Cooling assembly; 301. Box body; 302. Baffle plate; 303. Cooling pipe; 4. Packing ring; 5. Cleaning assembly; 501. Scraper; 502. Transmission assembly; 5021. Threaded column; 5022. Synchronous pulley; 5023. Synchronous belt; 503. Lifting plate; 504. Crack cleaning assembly; 5041. Inclined plate 5042, Moving block; 5043, First spring; 5044, Torsion spring; 6, Disturbance assembly; 601, Connecting shaft; 602, Disturbance plate; 603, Pulley; 604, Gear; 605, Rack; 7, Angle clearing assembly; 701, Fixing ring; 702, Cleaning tube; 703, Guide convex strip; 704, Crushing tooth; 705, Crushing rod; 706, Stop block; 707, Retaining ring; 708, Second spring. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] Reference Figure 1-11 A lithium ore roasting rotary kiln includes a kiln body 1 and a reaction tower 2 connected to the exhaust pipe of the kiln body 1. The reaction tower 2 includes a tower body 201 and a spray pipe 203 installed at the top of the tower body 201. The spray pipe 203 is used to spray alkaline liquid to filter and neutralize dust and harmful substances in the flue gas. The bottom of the tower body 201 is connected to the exhaust pipe of the kiln body 1 through an air inlet pipe 202. A cooling component 3 is connected to the middle of the tower body 201. The cooling component 3 includes a box 301 that is connected and fixed to the tower body 201 and a cooling pipe 303 installed inside the box 301. Two partitions 302 are symmetrically fixed to the inner wall of the box 301. The two partitions 302 are located on both sides of the tower body 201. The cooling pipe 303 is fixed in a serpentine shape on the surface of the two partitions 302. The bends of the cooling pipe 303 are all located on the side of the two partitions 302 that are far apart from each other. The straight section of the cooling pipe 303 is located between the two partitions 302. Both ends of the cooling pipe 303 are located on the outside of the box 301 to facilitate pipe connection with external equipment.

[0032] Understandably, during the lithium ore roasting process in kiln 1, the generated flue gas is discharged into tower 201 through exhaust pipe and inlet pipe 202. The flue gas rises and floats, first contacting the cooling pipe 303. The low-temperature water circulating in the cooling pipe 303 exchanges heat with the flue gas, cooling its temperature to a suitable temperature for reaction with the alkaline solution. At the same time, the water, after absorbing heat, can be used in other processes. Alkaline water mist is sprayed through spray pipe 203, reacting with the flue gas, adsorbing dust in the flue gas, and deacidifying fluorides and sulfur oxides, thus purifying the flue gas. When the flue gas passes through the cooling pipe 303, the flow rate of the flue gas is reduced, and the cooling pipe 303 can increase the contact area between the flue gas and the alkaline water mist, allowing the flue gas to fully react with the alkaline water mist.

[0033] Specifically, multiple packing rings 4 are stacked on top of the cooling tube 303 at the top. The packing rings 4 are spherical metal rings. The gaps between the cooling tubes 303 are smaller than the diameter of the packing rings 4. The surface of the box 301 is provided with maintenance ports for cleaning the packing rings 4.

[0034] It is understandable that by stacking packing rings 4 above the cooling pipe 303, the flue gas and alkaline water mist can come into contact in the gaps between the packing rings 4, thereby further increasing the contact area between the flue gas and alkaline water mist and prolonging the reaction time.

[0035] Specifically, the surface of the cooling tube 303 is provided with a cleaning component 5 for cleaning the cooling tube 303. The cleaning component 5 includes a scraper 501 that slides laterally on the straight sections of multiple cooling tubes 303 and a lifting plate 503 fixed to the upper end of the scraper 501. The scraper 501 slides on the surface of the cooling tube 303 through a transmission component 502. The transmission component 502 includes threaded posts 5021 that rotate symmetrically on the surfaces of two partitions 302. Both threaded posts 5021 are threadedly connected to both sides of the scraper 501. One end of each of the two threaded posts 5021 is fixed with a synchronous pulley 5022. The two synchronous pulleys 5022 are connected by a synchronous belt 5023. One of the threaded posts 5021 is driven to rotate by a motor, and the motor is fixed to the inner wall of the housing 301. The lifting plate 503 slides on the surface of the cooling tube 303 above. The width of the lifting plate 503 is greater than the width of the scraper 501. The upper surface of the lifting plate 503 is inverted V-shaped. The surfaces of the two partitions 302 are provided with grooves to avoid the lifting plate 503.

[0036] Understandably, during prolonged operation, dust in the flue gas reacts with alkaline water mist in reaction with the reaction gas, easily forming scale on the surfaces of the cooling tube 303 and the packing ring 4. This scale on the surface of the cooling tube 303 affects heat exchange efficiency. Therefore, to reduce the frequency of manual maintenance of the reaction tower 2, a cleaning component 5 is installed to clean the cooling tube 303. When cleaning of the cooling tube 303 is required, the motor drives the threaded column 5021 to rotate. With the cooperation of the synchronous belt 5023 and the synchronous pulley 5022, the other threaded column 5021 is moved... The rotation causes the two threaded columns 5021 to move the scraper 501 on the surface of the cooling tube 303, thereby cleaning the scale on the surface of the cooling tube 303 and avoiding affecting the heat exchange efficiency. By setting the lifting plate 503, the scraper 501 moves and pushes the packing ring 4, avoiding the scraper 501 from squeezing the packing ring 4 during the movement, which would affect the movement of the scraper 501. By setting the groove, when the scraper 501 moves to the side of the partition 302, the lifting plate 503 enters the groove, so that the scraper 501 can fit against the partition 302.

[0037] Specifically, multiple sets of seam cleaning components 504 are symmetrically arranged on the lower surface of the lifting plate 503. The multiple sets of seam cleaning components 504 are located on both sides of the scraper 501, and the multiple sets of seam cleaning components 504 are located between multiple cooling pipes 303. The cleaning assembly 504 includes an inclined plate 5041 for cleaning the packing ring 4 between the cooling tubes 303 and a moving block 5042 for sliding the inclined plate 5041. The moving block 5042 slides on the lower surface of the lifting plate 503. The sliding direction of the moving block 5042 is the same as the sliding direction of the scraper 501. The upper end of the inclined plate 5041 is hinged to the surface of the moving block 5042 by a pivot. A torsion spring 5044 is sleeved on the surface of the pivot for driving the lower end of the inclined plate 5041 to tilt away from the scraper 501. A first spring 5043 is fixed between the moving block 5042 and the scraper 501 to push the moving block 5042 to move outward.

[0038] Under normal conditions, the first spring 5043 pushes the moving block 5042 and the inclined plate 5041 to slide to the edge of the lifting plate 503. The torsion spring 5044 drives the inclined plate 5041 to rotate to an inclined state where the lower end is away from the scraper 501. During the movement of the scraper 501 and the lifting plate 503, the inclined plate 5041 is inserted into the gap between the cooling tubes 303, thereby picking out the packing ring 4 located between the cooling tubes 303, so as to avoid squeezing the packing ring 4 during the movement of the scraper 501 and affecting the movement of the scraper 501. To prevent the inclined plate 5041 from affecting the scraper 501's proximity to the two partitions 302, the inclined plate 5041 can slide via the moving block 5042. When the inclined plate 5041 touches the surface of the partition 302, the resulting reaction force drives the inclined plate 5041 to move towards the scraper 501. At the same time, the inclined plate 5041 is rotated to a vertical position, thereby reducing the influence of the inclined plate 5041 on the scraper 501's proximity to the partition 302 and allowing the scraper 501 to clean out a longer cooling tube 303.

[0039] Specifically, the tower body 201 is equipped with a disturbance component 6 for agitating the packing rings 4. The disturbance component 6 includes a connecting shaft 601 fixed at the junction of the box body 301 and the tower body 201 and multiple disturbance plates 602 rotating on the surface of the connecting shaft 601. The multiple disturbance plates 602 are all at the same height as the multiple packing rings 4. The connecting shaft 601 is located in the middle of the disturbance plates 602. The two disturbance plates 602 located below are respectively fixed with a lever 603 in the middle. The upper end of the lever 603 is flush with the adjacent upper disturbance plate 602. The bottom of the lowest disturbance plate 602 is fixed with a gear 604, the axis of the gear 604 coincides with the axis of the connecting shaft 601, and a rack 605 that cooperates with the gear 604 is fixed on the upper surface of the lifting plate 503.

[0040] Understandably, during prolonged operation, the packing rings 4 remain stationary, and a mixture of alkaline liquid and dust can easily remain in the gaps between them, eventually leading to scaling and affecting the ventilation effect of the packing rings 4. Therefore, a disturbance component 6 is installed. When the scraper 501 cleans the cooling tube 303, the lifting plate 503 drives the rack 605 to move. When the rack 605 passes the gear 604, it meshes with the gear 604, causing the bottom disturbance plate 602 to rotate. After the bottom disturbance plate 602 rotates a certain distance, the pusher block 603 drives the adjacent upper disturbance plate 602 to rotate, thus rotating multiple disturbance plates 602 from bottom to top. This causes the disturbance plates 602 to agitate the packing rings 4, separating the scale between the packing rings 4 from the packing rings 4, thereby avoiding excessive scaling that affects the ventilation effect and reducing the number of manual maintenance operations. By setting the toggle block 603, multiple disturbance plates 602 are rotated sequentially from bottom to top. When the lower disturbance plate 602 rotates, the upper disturbance plate 602 has not yet started to rotate. The lower disturbance plate 602 agitates the lower packing ring 4. The upper packing ring 4 moves relative to the lower packing ring 4, and the resulting collision friction can further improve the cleaning effect. This avoids the phenomenon that all disturbance plates 602 rotate synchronously, thereby driving all packing rings 4 to rotate as a whole, resulting in less relative movement between the packing rings 4, which affects the cleaning effect.

[0041] Specifically, multiple sets of corner cleaning components 7 are fixed on the surface of the scraper 501 for cleaning the junction of the cooling tube 303 and the partition 302. The corner cleaning component 7 includes a fixing ring 701 fixed on the surface of the scraper 501 and a cleaning tube 702 disposed inside the fixing ring 701. The fixing ring 701 and the cooling tube 303 are coaxially arranged. The cleaning tube 702 slides on the surface of the cooling tube 303. The two ends of the cleaning tube 702 are located on both sides of the scraper 501, and multiple breaking teeth 704 are fixed at both ends of the cleaning tube 702.

[0042] Understandably, during the process of scraper 501 cleaning the cooling tube 303, when scraper 501 approaches partition 302, it easily squeezes the damp scale onto the junction of cooling tube 303 and partition 302, forming annular scale. After repeated cleaning, the volume of the annular structure increases, affecting the heat exchange of cooling tube 303 and increasing the resistance of scraper 501 when it approaches partition 302, thus affecting the cleaning effect of scraper 501. Therefore, a corner cleaning component 7 is provided. When scraper 501 drives corner cleaning component 7 to approach partition 302, cleaning tube 702 drives multiple breaking teeth 704 to abut against the annular scale. The breaking teeth 704 break the annular scale, causing it to fall off the surface of cooling tube 303, thus achieving the purpose of cleaning the scale at the junction of cooling tube 303 and partition 302.

[0043] Specifically, the cleaning tube 702 slides on the inner wall of the fixing ring 701. The surface of the cleaning tube 702 is provided with a spiral guide protrusion 703. The two ends of the cleaning tube 702 are respectively provided with retaining rings 707. The retaining rings 707 are fixed on the surface of multiple crushing teeth 704. A second spring 708 is provided between one of the retaining rings 707 and the scraper 501. The second spring 708 is sleeved on the surface of the cleaning tube 702.

[0044] Understandably, when the breaking teeth 704 pierce the annular scale and come into contact with the surface of the partition 302, the resulting reaction force pushes the cleaning tube 702 to slide on the inner wall of the fixed ring 701. Under the action of the spiral guide convex strip 703, the cleaning tube 702 drives multiple breaking teeth 704 to rotate, thereby improving the cleaning effect of the breaking teeth 704 on the annular scale. By setting the second spring 708, pressure is provided for the breaking teeth 704 to break the annular scale.

[0045] Specifically, multiple crushing rods 705 slide on the outer surface of the fixing ring 701. Multiple grooves are provided on the surface of the fixing ring 701 for the crushing rods 705 to slide. The sliding direction of the crushing rods 705 is the same as the sliding direction of the cleaning pipe 702. The two ends of the multiple crushing rods 705 are flush with multiple crushing teeth 704 respectively. The multiple crushing rods 705 are evenly spaced and the multiple crushing rods 705 and multiple crushing teeth 704 are staggered. Two stops 706 are symmetrically fixed on the surface of the crushing rods 705. The two stops 706 are located between two stop rings 707 and abut against the sides of the two stop rings 707 respectively.

[0046] It is understandable that by setting the crushing rod 705 and offsetting it with the crushing tooth 704, after the crushing tooth 704 penetrates the annular scale, the crushing rod 705 simultaneously penetrates the annular scale. When the cleaning tube 702 drives the crushing tooth 704 to rotate, the crushing rod 705 and the fixed ring 701 are in a stationary state, thereby generating relative movement between the crushing tooth 704 and the crushing rod 705, tearing the annular scale, further improving the cleaning effect on the scale, and preventing the annular scale from rotating along with the rotation of the crushing tooth 704. By setting a stop 706, and with the cooperation of two retaining rings 707, the cleaning pipe 702 drives the crushing rod 705 to slide synchronously.

[0047] In this invention, during the lithium ore roasting process in kiln 1, the generated flue gas is discharged into tower 201 through exhaust pipe and inlet pipe 202. The flue gas rises and floats, first contacting cooling pipe 303. Low-temperature water circulating in cooling pipe 303 exchanges heat with the flue gas, cooling its temperature. Simultaneously, the water, after absorbing heat, can be used in other processes. Alkaline water mist is sprayed through spray pipe 203, reacting with the flue gas to adsorb dust and deacidify fluorides and sulfur oxides, achieving flue gas purification. As the flue gas passes through cooling pipe 303, the cooling pipe 303 and the packing material... Ring 4 can reduce the flow rate of flue gas, and cooling tube 303 can increase the contact area between flue gas and alkaline water mist, prolonging the reaction time and allowing the flue gas to fully react with the alkaline water mist. When cleaning of cooling tube 303 is required, the motor drives the threaded column 5021 to rotate, causing the two threaded columns 5021 to drive the scraper 501 to move on the surface of cooling tube 303, thereby cleaning the scale on the surface of cooling tube 303 and avoiding affecting the heat exchange efficiency. By setting up lifting plate 503 and gap cleaning assembly 504, the scraper 501 moves and pushes the packing ring 4, avoiding the scraper 501 from squeezing the packing ring 4 during the movement. This affects the movement of the scraper 501; when the scraper 501 approaches the partition 302, the lifting plate 503 enters the groove, allowing the scraper 501 to get closer to the partition 302; the cleaning pipe 702 drives multiple crushing teeth 704 and crushing rods 705 to abut against the annular scale, and the resulting reaction force pushes the cleaning pipe 702 to slide on the inner wall of the fixed ring 701. Under the action of the spiral guide convex strip 703, the cleaning pipe 702 drives multiple crushing teeth 704 to rotate, causing relative movement between the crushing teeth 704 and the crushing rods 705, tearing the annular scale, improving the cleaning effect of the scale, and preventing the annular scale from following the crushing teeth 704. The scraper 501 rotates while cleaning the cooling tube 303, causing the lifting plate 503 to move the rack 605. When the rack 605 passes the gear 604, it meshes with the gear 604, causing the bottom disturbance plate 602 to rotate. After the bottom disturbance plate 602 rotates a certain distance, the toggle block 603 then causes the adjacent upper disturbance plate 602 to rotate, thus causing multiple disturbance plates 602 to rotate from bottom to top. This causes the disturbance plates 602 to agitate the packing ring 4, separating the scale between the packing rings 4 from the packing rings 4, thereby avoiding excessive scale from affecting the ventilation effect and reducing the number of manual maintenance operations.

[0048] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A rotary kiln for roasting lithium ore, comprising a kiln body (1), characterized in that, The exhaust pipe of the kiln body (1) is connected to a reaction tower (2) for purifying flue gas. The reaction tower (2) includes a tower body (201) and a spray pipe (203) installed at the top of the tower body (201). The spray pipe (203) is used to spray alkaline liquid to filter and neutralize the dust and harmful substances in the flue gas. A cooling component (3) for reducing the temperature of the flue gas to the temperature required for the reaction is connected to the middle of the tower body (201). A cleaning component (5) for cleaning the cooling pipe (303) is installed on the surface of the cooling component (3). The cleaning assembly (5) includes a scraper (501) that slides laterally across a straight section of multiple cooling tubes (303) and a lifting plate (503) fixed to the upper end of the scraper (501). Multiple packing rings (4) are stacked above the uppermost cooling tube (303), and the gap between the cooling tubes (303) is smaller than the diameter of the packing rings (4); The tower body (201) is provided with a disturbance component (6) for agitating the packing rings (4). The disturbance component (6) includes a connecting shaft (601) fixed at the junction of the box body (301) and the tower body (201) and a plurality of disturbance plates (602) rotating on the surface of the connecting shaft (601). The plurality of disturbance plates (602) are all at the same height as the plurality of packing rings (4). The two disturbance plates (602) located below are respectively fixed with a lever (603) in the middle. The upper end of the lever (603) is flush with the adjacent upper disturbance plate (602). The scraper (501) has multiple sets of corner cleaning components (7) fixed on its surface for cleaning the junction of the cooling tube (303) and the partition (302). The corner cleaning components (7) include a fixing ring (701) fixed on the surface of the scraper (501) and a cleaning tube (702) disposed inside the fixing ring (701). Multiple breaking teeth (704) are fixed at both ends of the cleaning tube (702). The cleaning tube (702) slides on the inner wall of the fixing ring (701). The surface of the cleaning tube (702) is provided with a spiral guide ridge (703). The two ends of the cleaning tube (702) are respectively provided with retaining rings (707). The retaining rings (707) are fixed on the surface of multiple crushing teeth (704). A second spring (708) is provided between one of the retaining rings (707) and the scraper (501). The second spring (708) is sleeved on the surface of the cleaning tube (702). Multiple breaking rods (705) slide on the outer surface of the fixed ring (701), and the sliding direction of the breaking rods (705) is the same as the sliding direction of the cleaning pipe (702).

2. The lithium ore roasting rotary kiln according to claim 1, characterized in that, The cooling component (3) includes a box (301) that is connected and fixed to the tower body (201) and a cooling pipe (303) disposed inside the box (301). Two partitions (302) are symmetrically fixed to the inner wall of the box (301). The two partitions (302) are located on both sides of the tower body (201). The cooling pipe (303) is fixed in a serpentine shape on the surface of the two partitions (302).

3. The lithium ore roasting rotary kiln according to claim 1, characterized in that, The scraper (501) slides on the surface of the cooling tube (303) via the transmission assembly (502), and the upper surface of the lifting plate (503) is inverted V-shaped.

4. The lithium ore roasting rotary kiln according to claim 1, characterized in that, The lower surface of the lifting plate (503) is symmetrically provided with multiple sets of cleaning components (504). The multiple sets of cleaning components (504) are located on both sides of the scraper (501) and are located between multiple cooling tubes (303). The cleaning component (504) includes an inclined plate (5041) for cleaning the packing ring (4) from between the cooling tubes (303) and a moving block (5042) for sliding the inclined plate (5041).

5. A lithium ore roasting rotary kiln according to claim 4, characterized in that, The moving block (5042) slides on the lower surface of the lifting plate (503), and the upper end of the inclined plate (5041) is hinged to the surface of the moving block (5042) by a pivot. A torsion spring (5044) is sleeved on the surface of the pivot for driving the lower end of the inclined plate (5041) to tilt away from the scraper (501).

6. A lithium ore roasting rotary kiln according to claim 5, characterized in that, The bottommost disturbance plate (602) is driven to rotate by a gear (604) and a rack (605). The gear (604) is fixed to the bottom of the bottommost disturbance plate (602), and the axis of the gear (604) coincides with the axis of the connecting shaft (601). The rack (605) is fixed to the upper surface of the lifting plate (503).

7. A lithium ore roasting rotary kiln according to claim 1, characterized in that, The fixing ring (701) and the cooling tube (303) are coaxially arranged, the cleaning tube (702) slides on the surface of the cooling tube (303), and the two ends of the cleaning tube (702) are located on both sides of the scraper (501).

8. A lithium ore roasting rotary kiln according to claim 7, characterized in that, The cleaning tube (702) slides on the inner wall of the fixing ring (701). The surface of the cleaning tube (702) is provided with a spiral guide ridge (703). The two ends of the cleaning tube (702) are respectively provided with retaining rings (707). The retaining rings (707) are fixed on the surface of multiple crushing teeth (704). A second spring (708) is provided between one of the retaining rings (707) and the scraper (501). The second spring (708) is sleeved on the surface of the cleaning tube (702).

Images