A high-temperature tail gas utilization device for lithium battery wet process

Abstract

The utility model relates to high temperature tail gas recycling equipment technical field especially relates to a kind of high temperature tail gas utilization device for lithium electricity wet process down.Its technical scheme includes the stainless steel tower body that the high temperature tail gas discharged by high temperature kiln upper exhaust pipe is recycled, further includes the stainless steel water tank located in the stainless steel tower body directly below.The utility model utilizes the cooperation of high temperature kiln, circulating mechanism, alarm mechanism and other structures, and the high temperature tail gas of high temperature kiln is sent into stainless steel tower body by exhaust pipe, air inlet pipe.Circulating pump extracts water in stainless steel water tank, and is sprayed to silicon carbide spray head by circulating water pipe, water pipe and other things, and fully contacts with tail gas in stainless steel bower ring layer, and recycles tail gas heat.Waste water backflow is concentrated by circulation, and alarm mechanism triggers alarm when precious metal concentration reaches standard, without additional power consumption evaporation.This move recycles tail gas heat, and reduces precious metal recovery energy consumption.

Description

Technical Field

[0001] This utility model relates to the technical field of high-temperature exhaust gas recovery and utilization equipment, and in particular to a device for utilizing high-temperature exhaust gas in lithium battery wet process. Background Technology

[0002] In traditional lithium-ion battery wet process, energy waste and increased production costs are prominent issues. On the one hand, a specific atmosphere is required when calcining materials in a high-temperature kiln. The exhaust gas temperature after calcination is usually higher than 600°C. This high-temperature atmosphere carries a large amount of heat when it is discharged through the exhaust pipe. This heat is directly released into the atmosphere without being recovered and reused, resulting in energy loss. On the other hand, the washing process in the wet process generates wastewater containing lithium, a precious metal. To recover the expensive metal, additional electricity is required to evaporate the wastewater, further increasing production energy consumption and costs. Utility Model Content

[0003] The purpose of this invention is to address the problems of energy waste and increased production costs in traditional lithium battery wet process, and to propose a high-temperature exhaust gas utilization device for lithium battery wet process.

[0004] The technical solution of this utility model is as follows: A device for utilizing high-temperature exhaust gas in the wet process of lithium batteries, comprising a stainless steel tower body for recovering high-temperature exhaust gas discharged from the exhaust pipe of a high-temperature kiln, and further comprising: a stainless steel water tank located directly below the stainless steel tower body, wherein the stainless steel water tank and the stainless steel tower body are provided with a circulation mechanism for continuously transporting water from the stainless steel water tank to the stainless steel tower body for spraying, and the interior of the stainless steel tower body is provided with multiple layers of stainless steel Pall rings corresponding to the circulation mechanism; and an alarm mechanism installed inside the stainless steel water tank and corresponding to the water level inside the tank.

[0005] Optionally, the circulation mechanism includes a circulation pump fixedly connected to the top of the stainless steel water tank. The circulation pump is equipped with a circulation water pipe and a suction pipe. The end of the suction pipe away from the circulation pump passes through the stainless steel water tank and contacts the bottom wall of the stainless steel water tank. The end of the circulation water pipe away from the circulation pump is fixedly connected to a pair of branch pipes. The branch pipes are equipped with multiple stainless steel spray pipes arranged in a linear pattern. The end of the stainless steel spray pipes away from the branch pipes is fixedly connected to multiple silicon carbide spray heads aligned with stainless steel Pall rings after passing through the stainless steel tower body. The silicon carbide spray heads are used to make the sprayed water partially evaporate after contacting the high-temperature exhaust gas, and the unevaporated part forms droplets that fall down.

[0006] Optionally, the interior of the stainless steel tower body is provided with multiple stainless steel grid plates that support corresponding stainless steel Pall rings.

[0007] Optionally, the outer wall of the high-temperature kiln is equipped with multiple inspection doors that correspond to each other vertically.

[0008] Optionally, a circulating water pipe is fixedly connected to the bottom end of the stainless steel tower body, and the bottom end of the circulating water pipe is fixedly connected to a stainless steel water tank. The circulating water pipe is used to transport the liquid droplets in the stainless steel tower body to the stainless steel water tank.

[0009] Optionally, the alarm mechanism includes a support sleeve fixedly connected to the top of the stainless steel water tank, a telescopic tube slidably connected to the middle of the support sleeve, a float plate fixedly connected to the bottom end of the telescopic tube after it movably passes through the stainless steel water tank, a pressing plate fixedly connected to the top end of the telescopic tube, a contact sensor corresponding to the pressing plate provided on the top of the support sleeve, an alarm installed on the upper surface of the stainless steel water tank, the alarm being electrically connected to the output end of the controller, and the contact sensor being electrically connected to the input end of the controller.

[0010] Optionally, the outer wall of the stainless steel water tank is fixedly connected to an inlet and outlet water pipe, and the outer wall of the inlet and outlet water pipe is equipped with a manually operated valve.

[0011] Optionally, an air inlet pipe is provided in the middle of the high-temperature kiln and the stainless steel tower body. One end of the air inlet pipe is fixedly connected to the end of the exhaust pipe away from the high-temperature kiln, and the end of the air inlet pipe away from the exhaust pipe is fixedly connected to the stainless steel tower body. The air inlet pipe is used to transport the exhaust gas in the exhaust pipe into the stainless steel tower body.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] This invention utilizes a combination of a high-temperature kiln, a circulation mechanism, and an alarm mechanism. High-temperature exhaust gas from the kiln is sent into the stainless steel tower body via an exhaust pipe and an inlet pipe. A circulation pump draws water from a stainless steel water tank, which is then sprayed through circulation pipes and distribution pipes to silicon carbide spray heads. This ensures thorough contact between the water and the exhaust gas in the stainless steel Pall ring layer, recovering the heat from the exhaust gas. After wastewater is recycled and concentrated, the alarm mechanism triggers when the precious metal concentration reaches the standard, eliminating the need for additional power consumption for evaporation. This approach recovers the heat from the exhaust gas and reduces energy consumption for precious metal recovery. Attached Figure Description

[0014] Figure 1 A schematic diagram of a high-temperature exhaust gas utilization device for lithium battery wet process is provided.

[0015] Figure 2 for Figure 1 A cross-sectional structural diagram of a stainless steel water tank;

[0016] Figure 3 for Figure 1 A cross-sectional view of the stainless steel tower body.

[0017] Attached reference numerals: 1. High-temperature kiln; 101. Exhaust pipe; 2. Inlet / outlet water pipe; 3. Air inlet pipe; 4. Stainless steel water tank; 5. Circulating pump; 6. Circulating water pipe; 61. Distribution pipe; 7. Inspection door; 8. Stainless steel Pall ring; 9. Silicon carbide spray head; 10. Stainless steel tower body; 11. Stainless steel spray pipe; 12. Circulating water inlet pipe; 13. Telescopic pipe; 14. Pumping pipe; 15. Floating plate; 16. Support sleeve; 17. Contact sensor; 18. Press plate; 19. Alarm; 20. Stainless steel grid plate; 21. Manual valve. Detailed Implementation

[0018] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0019] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0020] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example

[0025] like Figures 1 to 3 As shown, this utility model proposes a high-temperature exhaust gas utilization device for lithium battery wet process, comprising a stainless steel tower 10 for recovering high-temperature exhaust gas discharged from exhaust pipe 101 of high-temperature kiln 1. The stainless steel tower 10 provides space for the high-temperature exhaust gas to contact with spray water and supports internal multi-layer stainless steel Pall rings 8 and related spray structures. Multiple vertically aligned inspection doors 7 are installed on the outer wall of the high-temperature kiln 1, facilitating routine maintenance and repair by personnel. The interior of the stainless steel tower 10 is equipped with multiple stainless steel grid plates 20 supporting the corresponding stainless steel Pall rings 8, ensuring stable layered arrangement. A stainless steel water tank 4 is located directly below the stainless steel tower 10, storing circulating water and wastewater containing lithium and other precious metals, providing a water source for the circulation mechanism. Inlet and outlet water pipes 2 are fixedly connected to the outer wall of the stainless steel water tank 4, used for replenishing fresh water or discharging high-concentration wastewater containing precious metals. The outer wall of the inlet and outlet water pipes 2 is equipped with a manually operated valve 21. The function of the manually operated valve 21 is to manually control the opening and closing of the inlet and outlet water pipes 2 and the water flow rate. The interior of the stainless steel tower body 10 is equipped with multiple layers of stainless steel Pall rings 8 corresponding to the circulation mechanism. Each layer of stainless steel Pall rings 8 is composed of multiple stacked rings, which increases the contact area between the sprayed water and the high-temperature exhaust gas, thereby improving the heat exchange efficiency.

[0026] Among them, such as Figures 1 to 3 As shown, the stainless steel water tank 4 and the stainless steel tower body 10 are equipped with a circulation mechanism that continuously transports water from the stainless steel water tank 4 to the stainless steel tower body 10 for spraying. The circulation mechanism includes a circulation pump 5 fixedly connected to the top of the stainless steel water tank 4. The circulation pump 5 provides power for water circulation, drawing water from the tank and delivering it to the spray structure. The circulation pump 5 is a power device used to continuously circulate a fluid (such as water) in a closed loop. The circulation pump 5 is equipped with a circulation water pipe 6 and a water extraction pipe 14. The circulation water pipe 6 connects the circulation pump 5 to the water distribution pipe 61, transporting the water extracted by the circulation pump 5 and realizing the transfer and transmission of water flow. The water extraction pipe 14 is connected to the circulation pump 5, with one end extending to the bottom wall of the stainless steel water tank 4, drawing water from the tank for circulation.

[0027] Secondly, such as Figures 1 to 3 As shown, the end of the pumping pipe 14 away from the circulating pump 5 passes through the stainless steel water tank 4 and contacts the bottom wall of the stainless steel water tank 4. The end of the circulating water pipe 6 away from the circulating pump 5 is fixedly connected to a pair of branch pipes 61. The branch pipes 61 connect the circulating water pipe 6 to the stainless steel spray pipes 11, diverting the water flow to multiple stainless steel spray pipes 11. Multiple stainless steel spray pipes 11 arranged linearly are mounted on the branch pipes 61. The stainless steel spray pipes 11 connect the branch pipes 61 to silicon carbide spray heads 9, delivering the diverted water flow to the silicon carbide spray heads 9. The end of the stainless steel spray pipe 11 away from the branch pipes 61 is fixedly connected through the stainless steel tower body 10, and multiple silicon carbide spray heads 9 aligned with the stainless steel Pall rings 8 are fixedly connected to each. The silicon carbide spray heads 9 are used to evenly spray water into the stainless steel tower body 10, ensuring full contact with the high-temperature exhaust gas. The silicon carbide spray head 9 is a spraying device made primarily of silicon carbide. The silicon carbide spray head 9 is used to make the sprayed water come into contact with the high-temperature exhaust gas, and part of it evaporates, while the unevaporated part forms droplets that fall down.

[0028] In addition, such as Figures 1 to 2 As shown, a circulating water pipe 12 is fixedly connected to the bottom end of the stainless steel tower body 10. The circulating water pipe 12 returns the unevaporated spray droplets in the tower to the stainless steel water tank 4. The bottom end of the circulating water pipe 12 is fixedly connected to the stainless steel water tank 4, and the circulating water pipe 12 is used to transport the droplets in the stainless steel tower body 10 to the stainless steel water tank 4.

[0029] It is worth noting that, such as Figures 1 to 2 As shown, an alarm mechanism corresponding to the water level is installed inside the stainless steel water tank 4. The alarm mechanism includes a support sleeve 16 fixedly connected to the top of the stainless steel water tank 4. The support sleeve 16 provides sliding support for the telescopic pipe 13, ensuring its vertical movement. The telescopic pipe 13 is slidably connected to the middle of the support sleeve 16, and the telescopic pipe 13 extends and retracts with changes in water level. The bottom end of the telescopic pipe 13 passes through the stainless steel water tank 4 and is fixedly connected to a float plate 15. The float plate 15 floats on the water surface of the stainless steel water tank 4 and rises and falls synchronously with the water level. The float plate 15 is made of engineering plastic and is hollow inside to increase buoyancy. A pressing plate 18 is fixedly connected to the top of the telescopic pipe 13. The pressing plate 18 rises and falls with the telescopic pipe 13, and triggers an alarm signal by contacting or disengaging from the contact sensor 17. The top of the support sleeve 16 is equipped with a contact sensor 17 corresponding to the pressing plate 18. The contact sensor 17 cooperates with the pressing plate 18 to sense changes in water level and transmit signals to the controller. The contact sensor 17 is a device that detects whether an object is in physical contact with itself and converts the contact state into an electrical signal output. An alarm 19 is installed on the upper surface of the stainless steel water tank 4. The alarm 19 receives signals from the controller and issues an alarm when the water level is too low. The alarm 19 is electrically connected to the output terminal of the controller, and the contact sensor 17 is electrically connected to the input terminal of the controller.

[0030] Furthermore, such as Figure 1 As shown, an air inlet pipe 3 is provided in the middle of the high-temperature kiln 1 and the stainless steel tower body 10. The air inlet pipe 3 connects the exhaust pipe 101 and the stainless steel tower body 10, and stably delivers the high-temperature exhaust gas into the stainless steel tower body 10. One end of the air inlet pipe 3 is fixedly connected to the end of the exhaust pipe 101 away from the high-temperature kiln 1, and the other end of the air inlet pipe 3 away from the exhaust pipe 101 is fixedly connected to the stainless steel tower body 10. The air inlet pipe 3 is used to deliver the exhaust gas in the exhaust pipe 101 into the stainless steel tower body 10.

[0031] In this embodiment, when using the high-temperature exhaust gas utilization device under the lithium battery wet process, the high-temperature exhaust gas generated by the high-temperature kiln 1 is discharged through the exhaust pipe 101 and transported to the stainless steel tower body 10 through the air inlet pipe 3. After the circulation pump 5 is started, the clean water in the stainless steel water tank 4 is drawn out through the water pumping pipe 14, and then passes through the circulation water pipe 6, the water distribution pipe 61 and the stainless steel spray pipe 11 in sequence, and is finally sprayed evenly into the stainless steel tower body 10 by the silicon carbide spray head 9.

[0032] Stainless steel grid plates 20 within the stainless steel tower body 10 support multiple layers of stainless steel Pall rings 8. Spray water and high-temperature exhaust gas come into full contact within the stainless steel Pall rings 8. The large amount of heat carried by the exhaust gas causes some of the spray water to evaporate, achieving heat recovery and reuse. The unevaporated spray water merges with precious metal particles in the exhaust gas to form droplets, which flow back to the stainless steel water tank 4 via the circulating water pipe 12, completing the water cycle. During this process, the clean water in the stainless steel water tank 4 gradually transforms into wastewater containing precious metals such as lithium. With repeated circulation, the amount of wastewater gradually decreases due to continuous evaporation, while the concentration of precious metals such as lithium continuously increases.

[0033] When the water level in the stainless steel water tank 4 is too low, it indicates that the concentration of precious metals such as lithium in the wastewater has reached the refining standard. At this time, the floating plate 15 will move down with the water level, causing the telescopic pipe 13 to move downwards, so that the pressing plate 18 presses down on the contact sensor 17. After receiving the signal, the controller will activate the alarm 19 to sound an alarm, prompting the staff to collect the high-concentration wastewater in the stainless steel water tank 4 for subsequent treatment. The staff can add fresh water or discharge high-concentration wastewater through the inlet and outlet pipes 2 outside the stainless steel water tank 4. The manual valve 21 can manually and precisely control the water flow. When the stainless steel water tank 4 is refilled and the water level returns to normal, the floating plate 15 will move the telescopic pipe 13 and the pressing plate 18 back to their original positions, the pressing plate 18 will move away from the contact sensor 17 again, and the alarm 19 will stop working. In addition, the maintenance door 7 on the outer wall of the high-temperature kiln 1 facilitates the staff to perform daily maintenance on the equipment, ensuring the long-term stable operation of the device.

[0034] The preferred embodiments of this utility model described above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for utilizing high-temperature tail gas in a lithium battery wet process, comprising a stainless steel tower (10) for recovering high-temperature tail gas discharged from the exhaust pipe (101) of a high-temperature kiln (1), characterized in that, Also includes: A stainless steel water tank (4) is located directly below the stainless steel tower body (10). The stainless steel water tank (4) and the stainless steel tower body (10) are provided with a circulation mechanism that continuously transports the water in the stainless steel water tank (4) to the stainless steel tower body (10) for spraying. The interior of the stainless steel tower body (10) is provided with multiple layers of stainless steel Pall rings (8) corresponding to the circulation mechanism. An alarm mechanism is installed inside the stainless steel water tank (4) and corresponds to the water level inside.

2. The high-temperature tail gas utilization device for lithium battery wet process according to claim 1, characterized in that, The circulation mechanism includes a circulation pump (5) fixedly connected to the top of the stainless steel water tank (4). The circulation pump (5) is provided with a circulation water pipe (6) and a pumping pipe (14). The end of the pumping pipe (14) away from the circulation pump (5) passes through the stainless steel water tank (4) and contacts the bottom wall of the stainless steel water tank (4). The end of the circulation water pipe (6) away from the circulation pump (5) is fixedly connected to a pair of water distribution pipes (61). The water distribution pipes (61) are provided with multiple stainless steel spray pipes (11) arranged in a linear pattern. The end of the stainless steel spray pipes (11) away from the water distribution pipes (61) is fixedly connected through the stainless steel tower body (10) and is fixedly connected to multiple silicon carbide spray heads (9) aligned with stainless steel Pall rings (8). The silicon carbide spray heads (9) are used to make the sprayed water come into contact with the high-temperature exhaust gas, and part of it evaporates, while the unevaporated part forms droplets that fall down.

3. The high-temperature tail gas utilization device under the lithium battery wet process according to claim 1, characterized in that, The stainless steel tower body (10) is provided with multiple stainless steel grid plates (20) that support the corresponding stainless steel Pall rings (8) inside.

4. The high-temperature tail gas utilization device for lithium battery wet process according to claim 1, characterized in that, The outer wall of the high-temperature kiln (1) is equipped with multiple inspection doors (7) corresponding to the upper and lower parts.

5. A high-temperature tail gas utilization device for lithium battery wet process according to claim 1, characterized in that, The bottom end of the stainless steel tower body (10) is fixedly connected to a circulating water pipe (12), and the bottom end of the circulating water pipe (12) is fixedly connected to a stainless steel water tank (4). The circulating water pipe (12) is used to transport the liquid droplets in the stainless steel tower body (10) to the stainless steel water tank (4).

6. A high-temperature tail gas utilization device for lithium battery wet process according to claim 1, characterized in that, The alarm mechanism includes a support sleeve (16) fixedly connected to the top of the stainless steel water tank (4). A telescopic tube (13) is slidably connected to the middle of the support sleeve (16). A floating plate (15) is fixedly connected to the bottom end of the telescopic tube (13) after it passes through the stainless steel water tank (4). A pressing plate (18) is fixedly connected to the top end of the telescopic tube (13). A contact sensor (17) corresponding to the pressing plate (18) is provided on the top of the support sleeve (16). An alarm (19) is installed on the upper surface of the stainless steel water tank (4). The alarm (19) is electrically connected to the output end of the controller. The contact sensor (17) is electrically connected to the input end of the controller.

7. A high-temperature tail gas utilization device for lithium battery wet process according to claim 1, characterized in that, The stainless steel water tank (4) is fixedly connected to an inlet / outlet pipe (2), and the inlet / outlet pipe (2) is provided with a manual valve (21) for manual operation.

8. A high-temperature tail gas utilization device for lithium battery wet process according to claim 1, characterized in that, The high-temperature kiln (1) and the stainless steel tower body (10) are provided with an air inlet pipe (3) in the middle. One end of the air inlet pipe (3) is fixedly connected to the end of the exhaust pipe (101) away from the high-temperature kiln (1), and the end of the air inlet pipe (3) away from the exhaust pipe (101) is fixedly connected to the stainless steel tower body (10). The air inlet pipe (3) is used to transport the exhaust gas in the exhaust pipe (101) into the stainless steel tower body (10).

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