An efficient cooling system for a rotary kiln

Abstract

The present invention relates to the technical field of rotary kiln cooling, and specifically, to a high-efficiency cooling system for a rotary kiln. It includes a rotary kiln body, a kiln body driving member, a kiln body cooling device, a flow deflecting assembly, and a workpiece cooling assembly arranged below the rotary kiln body. The kiln body cooling device includes a cooling sleeve, and a steam pipe and a gas guide pipe are connected to the cooling sleeve. The flow deflecting assembly includes a fixed ring installed on the cooling sleeve, a transmission ring is rotatably arranged on the outer side of the fixed ring, and flow deflecting plates are arranged on the transmission ring. The workpiece cooling assembly is used for storing liquid and cooling workpieces. In the present invention, the rotation of the flow deflecting plates is driven by the discharge of water vapor formed by the heating of the liquid, so as to synchronously spray and cool the rotary kiln body and the kiln body cooling device, accelerate the cooling efficiency of the rotary kiln body, and at the same time, the rotation of the flow deflecting plates swings the air flow nearby, accelerating the exchange of hot and cold air nearby and improving the cooling efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary kiln cooling, and more specifically, to an efficient cooling system for a rotary kiln. Background Art

[0002] A rotary kiln is a carrier for calcining lithium battery material parts by controlling the internal temperature change.

[0003] During the calcination of lithium battery materials, it is necessary to control the rotary kiln within a predetermined calcination temperature range for isothermal processing. However, for the rotary kiln, during the continuous heating process, when it reaches a certain temperature, it cannot automatically stop rising. Therefore, a water-cooling structure is currently provided on the rotary kiln to remove heat and control the temperature of the rotary kiln within the predetermined constant temperature range for calcination.

[0004] Among them, the current water-cooling device provided on the rotary kiln only removes heat by continuously injecting water flow, without any optimized design of other structures. This results in low practicability of the current rotary kiln cooling device. Moreover, relying solely on the water-cooling structure for cooling the rotary kiln is also relatively slow, and it is impossible to quickly bring the temperature of the rotary kiln to the constant temperature range. Summary of the Invention

[0005] The purpose of the present invention is to provide an efficient cooling system for a rotary kiln to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention aims to provide an efficient cooling system for a rotary kiln, including a rotary kiln body, a kiln body driving member, a kiln body cooling device, a flow deflection assembly, and a workpiece cooling assembly arranged below the rotary kiln body. The kiln body driving member is used to drive the rotary kiln body to rotate for calcination work. The kiln body cooling device includes a cooling sleeve arranged on the rotary kiln body for storing liquid. A steam pipe is connected to the cooling sleeve, and a gas guide pipe for discharging gas is arranged on the steam pipe. The flow deflection assembly includes a fixed ring installed on the cooling sleeve. A transmission ring is rotatably arranged on the outer side of the fixed ring. A flow deflection plate is arranged on the transmission ring. The flow deflection plate is used to contact the gas discharged from the gas guide pipe and rotate. The workpiece cooling assembly is used to store liquid and cool the workpiece. When the flow deflection plate rotates, it will stir the liquid in the workpiece cooling assembly and throw the liquid into the nearby air.

[0007] As a further improvement of this technical solution, the kiln body driving member includes a driven wheel installed on the rotary kiln body. A driving wheel is meshed and connected to one side of the driven wheel, and the driving wheel is driven by a driving motor.

[0008] As a further improvement of the present technical solution, the kiln body driving member further includes support rails symmetrically installed on the rotary kiln body. A rail disc is slidably connected to the upper part of the support rails. The sides of the rail disc and the driving wheel are both supported by brackets provided.

[0009] As a further improvement of the present technical solution, arc grooves are provided on the inner walls of the fixed ring and the transmission ring, and a number of ball bearings are arranged in the arc grooves.

[0010] As a further improvement of the present technical solution, the workpiece cooling assembly includes a cooling bin arranged directly below the rotary kiln body. A plurality of baffles are installed on the cooling bin, and a guiding port for the flow deflector to stir the liquid is left between adjacent baffles.

[0011] As a further improvement of the present technical solution, an extension part is installed on one side of the bottom of the baffle.

[0012] As a further improvement of the present technical solution, a connecting plate for supporting the kiln body cooling device is installed on the surface of the baffle.

[0013] As a further improvement of the present technical solution, a drain pipe for discharging liquid is installed at the bottom of the cooling bin.

[0014] As a further improvement of the present technical solution, an air extraction assembly for extracting water vapor is arranged on one side of the cooling bin, and the extracted water vapor is introduced into the rotary kiln body to preheat the lithium battery material. The air extraction assembly includes an exhaust pipe communicated with the cooling bin. An air extraction pump is installed on the exhaust pipe, and one end of the exhaust pipe is communicated with the rotary kiln body.

[0015] As a further improvement of the present technical solution, a valve is installed at one end of the exhaust pipe close to the rotary kiln body.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. In this high-efficiency cooling system of the rotary kiln, the heat on the rotary kiln body is taken away by the exchange of liquid in the cooling sleeve, accelerating the cooling of the rotary kiln body; and the water vapor formed by the heating of the liquid is discharged through the air guide pipe, and drives the flow deflector to rotate. The flow deflector stirs the movement of the liquid in the workpiece cooling assembly, and the water droplets attached to the flow deflector are scattered during rotation, spraying and cooling the rotary kiln body and the kiln body cooling device synchronously, accelerating the cooling efficiency of the rotary kiln body. At the same time, the rotation of the flow deflector also swings the nearby air flow, accelerating the exchange of hot and cold air nearby, improving the cooling efficiency. And the water vapor discharged from the steam pipe contacts the water droplets in the air, which will also reduce the temperature of the nearby air, thereby overall improving the temperature reduction efficiency of the rotary kiln body.

[0018] 2. In the high-efficiency cooling system of the rotary kiln, after the workpieces are cooled by the workpiece cooling component, the fluctuation of the flow deflection plate will also accelerate the flow and heat dissipation of the liquid in the cooling bin, which is beneficial to the subsequent placement of workpieces for cooling.

[0019] 3. In the high-efficiency cooling system of the rotary kiln, through the setting of the rolling balls for sliding, the rotation of the flow deflection plate is increased, improving the rotation efficiency of the flow deflection plate. As the rotation efficiency of the flow deflection plate accelerates, the air exchange efficiency in the vicinity accelerates, and the range of water droplets thrown out from the flow deflection plate also expands. The temperature of the nearby air is quickly humidified, accelerating the cooling efficiency of the rotary kiln body. Brief Description of the Drawings

[0020] Figure 1 The first schematic diagram of the overall structure of the present invention;

[0021] Figure 2 The schematic diagram of the rotary kiln body and the kiln body driving member structure of the present invention;

[0022] Figure 3 The schematic diagram of the kiln body cooling device structure of the present invention;

[0023] Figure 4 The schematic diagram of the flow deflection component structure of the present invention;

[0024] Figure 5 The schematic diagram of the workpiece cooling component structure of the present invention;

[0025] Figure 6 The partial structure schematic diagram of the workpiece cooling component of the present invention;

[0026] Figure 7 The second schematic diagram of the overall structure of the present invention;

[0027] Figure 8 The schematic diagram of the workpiece cooling component and the air extraction component structure of the present invention.

[0028] The meanings of each label in the figure are as follows:

[0029] 10. Rotary kiln body; 11. Sealing cover;

[0030] 20. Kiln body driving member; 201. Driven wheel; 202. Driving wheel; 203. Driving motor; 204. Support rail; 205. Rail disc; 206. Bracket;

[0031] 30. Kiln body cooling device; 301. Cooling sleeve; 302. Steam pipe; 303. Air guide pipe; 304. Liquid injection pipe;

[0032] 40. Flow deflection component; 401. Fixed ring; 402. Rolling ball; 403. Transmission ring; 404. Flow deflection plate;

[0033] 50. Workpiece cooling component; 501. Cooling bin; 502. Baffle; 5021. Extension part; 503. Guide port; 504. Connecting plate; 505. Drain pipe;

[0034] 60. Air extraction component; 601. Exhaust pipe; 602. Air extraction pump; 603. Valve. Detailed implementation mode

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0037] Embodiment 1

[0038] Please refer to Figures 1-6As shown in the figure, this embodiment provides a high-efficiency cooling system for a rotary kiln, which includes a rotary kiln body 10, a kiln body driving member 20, a kiln body cooling device 30, a flow deflection assembly 40, and a workpiece cooling assembly 50 arranged below the rotary kiln body 10. In this embodiment, one side of the rotary kiln body 10 is sealed by a sealing cover 11. When the sealing cover 11 is opened, the lithium battery material is placed inside the rotary kiln body 10 and then the sealing cover 11 is closed. Among them, the kiln body driving member 20 is used to drive the rotary kiln body 10 to rotate for calcination work. The kiln body cooling device 30 includes a cooling sleeve 301 arranged on the rotary kiln body 10 for storing liquid. A steam pipe 302 is communicated with the cooling sleeve 301, and an air duct 303 for discharging gas is arranged on the steam pipe 302. The flow deflection assembly 40 includes a fixing ring 401 installed on the cooling sleeve 301. A transmission ring 403 is rotatably arranged on the outer side of the fixing ring 401, and a flow deflection plate 404 is arranged on the transmission ring 403. The flow deflection plate 404 can be driven to rotate by the gas discharged from the air duct 303. The workpiece cooling assembly 50 is used to store liquid and cool the workpiece. When the flow deflection plate 404 rotates, it will stir the liquid in the workpiece cooling assembly 50 and throw the liquid into the nearby air (the liquid preferably uses water flow. The flow deflection plate 404 stirs the water flow and throws it out because of the water droplets attached to its surface).Start heating through the rotary kiln body 10, and the kiln body driving part 20 drives the rotary kiln body 10 to rotate. At this time, the rotary kiln body 10 begins the calcination work. When the rotary kiln body 10 needs to control the temperature to a constant temperature range through water cooling for calcination work, a liquid injection pipe 304 for injecting liquid is installed on the cooling sleeve 301, and a pipe for discharging liquid is arranged at the bottom surface of the cooling sleeve 301. The pipe can be extended outward by connecting it to the pipe body. Since the inner wall of the cooling sleeve 301 is a hollow structure, by continuously injecting liquid into the liquid injection pipe 304, the liquid exchanges heat in the cooling sleeve 301 and takes away the heat on the rotary kiln body 10 and leaves through the pipe. Among them, because the calcination temperature of the rotary kiln body 10 is in the range of 600 - 900, the temperature of the liquid in the cooling sleeve 301 is always relatively high, and the water vapor formed by the heating of the liquid will enter the steam pipe 302 upward. The design of the steam pipe 302 can initially reduce the temperature of the cooling sleeve 301 to facilitate the subsequent cooling of the rotary kiln body 10 by the liquid. And the water vapor is discharged outward through the air guide pipe 303. Because of the relatively high temperature of the water vapor, the generated pressure will drive the flow deflection plate 404 to rotate. Since the internal of the workpiece cooling assembly 50 is initially set with liquid for cooling the calcined workpiece, the flow deflection plate 404 moves to drive the liquid in the workpiece cooling assembly 50 to move, and the water droplets attached to the flow deflection plate 404 splash when rotating, spraying and cooling the rotary kiln body 10 and the kiln body cooling device 30 synchronously, accelerating the cooling efficiency of the rotary kiln body 10. And when the flow deflection plate 404 rotates, it also swings the nearby air flow, accelerating the exchange of hot and cold air nearby and improving the cooling efficiency. And the water vapor discharged from the steam pipe 302 contacts the water droplets in the air, which will also reduce the temperature of the nearby air, thereby overall improving the temperature reduction efficiency of the rotary kiln body 10.,

[0039] Among them, when the workpiece cooling assembly 50 cools the workpiece, the fluctuation of the flow deflection plate 404 will also accelerate the flow and heat dissipation of the liquid in the cooling bin 501, which is beneficial to the subsequent placement and cooling of the workpiece.

[0040] In order to elaborate on the structure of the kiln body driving part 20 above in detail to facilitate the implementation by professionals in this field, the kiln body driving part 20 includes a driven wheel 201 installed on the rotary kiln body 10. A driving wheel 202 is meshed and connected to one side of the driven wheel 201. The driving wheel 202 is driven by a driving motor 203. By driving the driving wheel 202 to rotate through the driving motor 203, the driving wheel 202 drives the driven wheel 201 to rotate, so that the rotary kiln body 10 will rotate and carry out the calcination work on the internally input lithium battery materials.

[0041] Among them, the kiln body driving member 20 further includes support rails 204 symmetrically installed on the rotary kiln body 10. A rail plate 205 is slidably connected to the upper part of the support rail 204. The side surfaces of the rail plate 205 and the driving wheel 202 are both supported by brackets 206 provided. The rail plate 205 is slidably arranged within the support rail 204. When the rotary kiln body 10 rotates, the support rail 204 will be rotatably connected to the rail plate 205. Thus, the rotary kiln body 10 is supported by multiple groups of support rails 204 and rail plates 205, reducing the wear of the rotation between the driven wheel 201 and the driving wheel 202 and improving the service life of the entire device.

[0042] Specifically, the workpiece cooling assembly 50 includes a cooling bin 501 arranged directly below the rotary kiln body 10. A plurality of baffles 502 are installed on the cooling bin 501. A guiding port 503 for the deflector plate 404 to fluctuate the liquid is left between adjacent baffles 502. By injecting liquid into the cooling bin 501, the heat-treated workpiece can be cooled. As the deflector plate 404 rotates to stir the liquid in the cooling bin 501, the heat exchange efficiency of the liquid in the cooling bin 501 is accelerated. Moreover, the deflector plate 404 throws water droplets into the air to accelerate the cooling efficiency, and the rotation of the deflector plate 404 will discharge the water vapor generated in the cooling bin 501, facilitating the acceleration of the cooling in the cooling bin 501.

[0043] Among them, an extension part 5021 is installed on one side of the bottom of the baffle 502. Considering that when the rotary kiln body 10 needs to dissipate heat and be cooled, in order to reduce the contact between the water vapor discharged from the relatively high temperature in the cooling bin 501 and the rotary kiln body 10, the extension part 5021 will form a partial blockage of the water vapor from leaving, reducing the contact between the water vapor and the rotary kiln body 10.

[0044] Secondly, a connecting plate 504 for supporting the kiln body cooling device 30 is installed on the surface of the baffle 502. The support of the connecting plate 504 prevents the kiln body cooling device 30 from rotating and ensures the operation of the entire device.

[0045] A drain pipe 505 for discharging liquid is installed at the bottom of the cooling bin 501. The cooling liquid can be replaced by opening the drain pipe 505.

[0046] Example 2, please refer to Figure 4As shown, considering that the liquid in the cooling bin 501 will generate resistance to the flow deflection plate 404, in order to improve the ability of the flow deflection plate 404 to rotate against the fluctuating liquid, arc grooves are provided on the inner walls of the fixed ring 401 and the transmission ring 403. A number of balls 402 are arranged in the arc grooves. The balls 402 are in contact with the fixed ring 401 and the flow deflection plate 404 respectively, so that the flow deflection plate 404 will slide on the balls 402, the friction is reduced, the rotation efficiency of the flow deflection plate 404 is accelerated, and a certain amount of generated resistance is offset by increasing the rotation speed. Moreover, the rotation efficiency of the flow deflection plate 404 is accelerated, the air exchange efficiency in the vicinity is accelerated, the range of water droplets thrown out from the flow deflection plate 404 is also enlarged, the temperature of the nearby air is quickly humidified, and the cooling efficiency of the rotary kiln body 10 is accelerated.

[0047] Example 3, there are also the following situations for the use of the workpiece cooling assembly 50:

[0048] Specifically as ①: Under the design of the guiding port 503, the water vapor formed by the workpiece contacting the liquid will be blocked and only part of it will contact the rotary kiln body 10 upward. Furthermore, when the rotary kiln body 10 is working continuously (continuously means that the heat-treated lithium battery in the rotary kiln body 10 is removed to the cooling bin 501 for cooling, and then new lithium battery materials are put into the rotary kiln body 10 for heat treatment again), the water vapor discharged from the cooling bin 501 will quickly heat up the rotary kiln body 10 and accelerate the heating efficiency of the rotary kiln body 10;

[0049] Specifically as ②: When the rotary kiln body 10 needs to perform the cooling operation as described above and when the liquid temperature in the cooling bin 501 is relatively low, that is, no water vapor will be generated and discharged outward from the cooling bin 501, no water vapor will contact the bottom surface of the rotary kiln body 10, ensuring the cooling efficiency of the rotary kiln body 10. Furthermore, a refrigeration pipe can be installed on the cooling bin 501 according to the specific usage situation, such as a refrigerator in a compressor, or a device that can discharge cold air to cool the liquid in the cooling bin 501.

[0050] Example 4, please refer to Figure 7 and Figure 8As shown, in order to enable the water vapor generated by cooling the workpieces in the cooling chamber 501 to preheat the lithium battery materials, an air extraction assembly 60 for extracting the water vapor is provided on one side of the cooling chamber 501, and the extracted water vapor is introduced into the rotary kiln body 10 to preheat the lithium battery materials. The air extraction assembly 60 includes an exhaust pipe 601 communicated with the cooling chamber 501. An air extraction pump 602 is installed on the exhaust pipe 601. One end of the exhaust pipe 601 is communicated with the rotary kiln body 10. The liquid level of the liquid in the cooling chamber 501 needs to be lower than the exhaust pipe 601. Among them, the output end of the exhaust pipe 601 penetrates through the central part of the sealing cover 11 and extends inward. When the air extraction pump 602 is turned on, it will extract the water vapor and transport it to the rotary kiln body 10 through the exhaust pipe 601. Since the end of the rotary kiln body 10 close to the end is the lithium battery preheating part, the preheating of the lithium battery is accelerated by the water vapor. Among them, a partition can be arranged in the rotary kiln body 10 to separate the preheating chamber and the heating chamber, which is beneficial to transfer the preheated lithium battery materials into the heating chamber; Secondly, there are multiple exhaust pipes 601, and one end of the exhaust pipe 601 close to the sealing cover 11 can be communicated, and the whole is input into the rotary kiln body 10 to preheat the lithium battery materials, making the whole device more simple; Among them, the working principle of the air extraction pump 602: through a mechanical device, the diaphragm inside the pump makes a reciprocating motion, so as to compress and stretch the air in the pump chamber with a fixed volume to form a vacuum (negative pressure). A pressure difference is generated between the air extraction port of the pump and the external atmospheric pressure. Under the action of the pressure difference, the gas is pressed (sucked) into the pump chamber and then discharged from the exhaust port.

[0051] Among them, a valve 603 is installed at one end of the exhaust pipe 601 close to the rotary kiln body 10. Since the exhaust pipe 601 is communicated with the rotary kiln body 10, when the rotary kiln body 10 is working, it is closed by the valve 603 to avoid the loss of the hot gas generated by the rotary kiln body 10 through the exhaust pipe 601; Among them, the working principle of the valve 603: the liquid is blocked by the valve plug rotating in the valve body.

[0052] 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 are only preferred examples of the present invention and are not used to limit 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 required by the present invention is defined by the appended claims and their equivalents.

Claims

1. An efficient cooling system for a rotary kiln, comprising a rotary kiln body (10), a kiln body driving member (20), a kiln body cooling device (30), a flow deflection assembly (40), and a workpiece cooling assembly (50) disposed below the rotary kiln body (10). The kiln body driving member (20) is used to drive the rotary kiln body (10) to rotate for calcination work, and is characterized in that: The kiln body cooling device (30) includes a cooling sleeve (301) provided on the rotary kiln body (10) for storing liquid. A steam pipe (302) is connected to the cooling sleeve (301). A gas guide pipe (303) for discharging gas is provided on the steam pipe (302). The flow deflecting assembly (40) includes a fixing ring (401) installed on the cooling sleeve (301). A transmission ring (403) is rotatably provided on the outer side of the fixing ring (401). A flow deflecting plate (404) is provided on the transmission ring (403). The flow deflecting plate (404) is used to contact the gas discharged from the gas guide pipe (303) and rotate. The workpiece cooling assembly (50) is used to store liquid and cool the workpiece. When the flow deflecting plate (404) rotates, it will stir the liquid in the workpiece cooling assembly (50) and throw the liquid into the nearby air; Arc grooves are provided on the inner walls of the fixing ring (401) and the transmission ring (403), and a number of rolling balls (402) are provided in the arc grooves; The workpiece cooling assembly (50) includes a cooling bin (501) provided directly below the rotary kiln body (10). A plurality of baffles (502) are installed on the cooling bin (501). A guiding port (503) for the flow deflecting plate (404) to stir the liquid is left between adjacent baffles (502); One side of the cooling bin (501) is provided with an air extraction assembly (60) for extracting water vapor, and the extracted water vapor is introduced into the rotary kiln body (10) to preheat the lithium battery material. The air extraction assembly (60) includes an exhaust pipe (601) connected to the cooling bin (501). An air extraction pump (602) is installed on the exhaust pipe (601). One end of the exhaust pipe (601) is connected to the rotary kiln body (10).

2. The high-efficiency cooling system for a rotary kiln according to claim 1, characterized in that: The kiln body driving member (20) includes a driven wheel (201) installed on the rotary kiln body (10). A driving wheel (202) is meshed and connected to one side of the driven wheel (201). The driving wheel (202) is driven by a driving motor (203).

3. The high-efficiency cooling system for a rotary kiln according to claim 2, wherein: The kiln body driving member (P20) further includes support rails (204) symmetrically installed on the rotary kiln body (10). A rail disc (205) is slidably connected to the support rails (204). The side surfaces of the rail disc (205) and the driving wheel (202) are both supported by brackets (206) provided; 4. The high-efficiency cooling system for a rotary kiln according to claim 1, characterized in that: One side of the bottom of the baffle (502) is installed with an extension part (5021).

5. The high-efficiency cooling system for a rotary kiln according to claim 4, characterized in that: A connecting plate (504) for supporting the kiln body cooling device (30) is installed on the surface of the baffle (502).

6. The high-efficiency cooling system for a rotary kiln according to claim 4, characterized in that: A drain pipe (505) for discharging liquid is installed at the bottom of the cooling bin (501).

7. The high-efficiency cooling system for a rotary kiln according to claim 1, characterized in that: A valve (603) is installed at one end of the exhaust pipe (601) close to the rotary kiln body (10).

Images