Reaction device for sulfur dioxide and waste lithium battery positive electrode powder slurry

Abstract

The utility model provides a reaction device for sulfur dioxide and waste lithium battery positive electrode powder slurry, and relates to the technical field of waste lithium battery recovery. According to the reaction device for the sulfur dioxide and the waste lithium battery positive electrode powder slurry, the stirring reaction tank, the sulfur dioxide gas inlet box and the gas mixing chamber are elaborately designed, and components such as the stirring assembly and the annular gas inlet mechanism are combined; the device realizes efficient mixing and full dissolution of sulfur dioxide and waste lithium battery positive electrode powder slurry, ensures rapid and efficient reaction, realizes continuous and stable supply and economical utilization of sulfur dioxide through a sulfur dioxide circulating system, effectively reduces waste and leakage risks, and is simple to operate and low in cost. And automatic operation is easy to realize, the complexity and difficulty of manual operation are reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste lithium battery recycling, in particular to a reaction device for sulfur dioxide and positive electrode powder slurry of waste lithium batteries. Background Art

[0002] With the transformation of the global energy structure and the rapid development of the new energy vehicle market, the demand and production of lithium batteries, as an important energy storage medium, continue to rise. However, after a certain period of use, the performance of lithium batteries will gradually decline and eventually become waste lithium batteries. If waste lithium batteries are not handled properly, they will not only pollute the environment, but also waste rare and precious metal resources such as nickel, cobalt, and lithium.

[0003] In my country, nickel, cobalt, lithium and other metal resources are not abundant and highly dependent on imports. Therefore, the effective recycling and utilization of waste lithium batteries not only helps to alleviate the problem of resource shortage in my country, but also has important environmental significance and economic value. At present, the recycling technology of waste lithium batteries mainly includes hydrometallurgy and pyrometallurgy. In hydrometallurgy, the selection and use of reducing agents are particularly critical. Sulfur dioxide, as a good reducing agent, is widely used due to its excellent reducing performance.

[0004] However, in the hydrometallurgical process, the dissolution effect of sulfur dioxide directly affects the degree and speed of the reduction reaction. If the dissolution effect is not good, it will not only reduce the reaction efficiency, but also increase the consumption of sulfur dioxide, and even lead to the leakage of sulfur dioxide, posing a potential threat to the environment and the health of operators. In addition, due to the large consumption of sulfur dioxide during the reaction, if it cannot be replenished in time, it will also affect the continuous progress of the reaction. Therefore, we have made improvements to this and proposed a reaction device for sulfur dioxide and waste lithium battery positive electrode powder slurry. Summary of the invention

[0005] The utility model aims to solve the existing problems of poor dissolution effect of sulfur dioxide in slurry, failure to replenish sulfur dioxide in time, waste of sulfur dioxide and leakage of sulfur dioxide.

[0006] In order to achieve the above-mentioned purpose of the invention, the utility model provides a reaction device for sulfur dioxide and waste lithium battery positive electrode powder slurry liquid to improve the above-mentioned problem.

[0007] The specific application is as follows:

[0008] A reaction device for sulfur dioxide and waste lithium battery positive electrode powder slurry, comprising:

[0009] A reaction tank, wherein an annular air inlet mechanism is provided in the reaction tank, a third feed inlet and an exhaust port are provided at the top of the reaction tank, a first discharge port is provided at the bottom of the reaction tank, and a stirring assembly is installed inside the reaction tank;

[0010] A sulfur dioxide air inlet box, wherein a second feed port is provided on the top of the sulfur dioxide air inlet box, a fourth discharge port is provided on the bottom of the sulfur dioxide air inlet box, a second air inlet is provided on the side of the sulfur dioxide air inlet box, a connecting pipe is provided between the second feed port and the fourth discharge port, an ejector is installed on the connecting pipe, and the fourth discharge port is connected to the third feed port, and the second air inlet is connected to the exhaust port, so as to form a sulfur dioxide circulation;

[0011] A gas mixing chamber, wherein a gas outlet is arranged at the bottom of the gas mixing chamber, and the gas outlet is communicated with a circular air inlet mechanism.

[0012] As a preferred technical solution of the present application, the stirring assembly includes a stirring paddle motor fixedly mounted on the top of the reaction tank, and the stirring paddle motor is connected to a stirring paddle body located in the reaction tank.

[0013] As a preferred technical solution of the present application, a spoiler is provided on the inner wall of the reaction tank, and a first feed port is also provided on the top of the reaction tank.

[0014] As a preferred technical solution of the present application, the annular air intake mechanism includes an annular tube arranged in the reaction tank, the annular tube is connected to an air intake pipe, one end of the air intake pipe passes through the reaction tank, and the bottom of the annular tube is connected to a plurality of jet nozzles.

[0015] As a preferred technical solution of the present application, the bottom end of the jet nozzle is inclined to the left by degrees and outward by degrees, and a plurality of pipe supports are installed between the annular tube and the inner wall of the reaction tank.

[0016] As a preferred technical solution of the present application, the gas outlet is connected to the gas inlet pipe, and a check valve is provided between the gas outlet and the gas inlet pipe to prevent liquid backflow;

[0017] As a preferred technical solution of the present application, the first discharge port and the second feed port are connected by a pipeline, and a mortar pump is provided on the pipeline. The mortar pump is used to transport the material to the sulfur dioxide air inlet box. After the material inhales sulfur dioxide in the sulfur dioxide air inlet box through an ejector, it returns to the reaction tank.

[0018] As a preferred technical solution of the present application, a three-way valve is connected between the fourth discharge port and the third feed port, and the three-way valve is connected to a discharge pipe.

[0019] As a preferred technical solution of the present application, a first air inlet is also provided on the top of the sulfur dioxide air inlet box.

[0020] As a preferred technical solution of the present application, a third air inlet and a fourth air inlet are provided on the top of the gas mixing chamber.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] In the scheme of this application:

[0023] In order to solve the problems in the prior art of poor dissolution of sulfur dioxide in slurry, failure to replenish sulfur dioxide in time, waste of sulfur dioxide and leakage of sulfur dioxide, the present application provides a reaction device of sulfur dioxide and slurry of positive electrode powder of waste lithium battery. The device realizes efficient mixing and sufficient dissolution of sulfur dioxide and slurry of positive electrode powder of waste lithium battery through carefully designed stirring reaction tank, sulfur dioxide air inlet box and gas mixing chamber, combined with stirring assembly and annular air inlet mechanism and other components, thereby ensuring rapid and efficient reaction. At the same time, through the circulation system of sulfur dioxide, continuous and stable supply and economical utilization of sulfur dioxide are realized, effectively reducing waste and leakage risks. In addition, the device is simple to operate and easy to realize automated operation, which reduces the complexity and difficulty of manual operation and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a reaction device for sulfur dioxide and waste lithium battery positive electrode powder slurry provided in this application;

[0025] Figure 2 A schematic diagram of the structure of the stirring reaction tank and the gas mixing chamber of the reaction device for sulfur dioxide and waste lithium battery positive electrode powder slurry provided in the present application;

[0026] Figure 3 This is a schematic structural diagram of the annular air intake mechanism of the reaction device for sulfur dioxide and waste lithium battery positive electrode powder slurry provided in the present application.

[0027] Indicated in the figure:

[0028] 1. Reaction tank; 2. Sulfur dioxide air inlet box; 3. Gas mixing chamber; 4. Stirring paddle motor; 5. Stirring paddle body; 6. Spoiler; 7. First feed port; 9. Annular air inlet mechanism; 1 1. First discharge port; 1 2. Mortar pump; 1 3. Second feed port; 14. Ejector; 1 5. Fourth discharge port; 1 6. Third feed port; 1 7. First air inlet; 1 8. Exhaust port; 1 9. Second air inlet; 2 0. Third air inlet; 2 1. Fourth air inlet; 2 2. Air outlet; 2 3. Air inlet pipe; 2 4. Annular pipe; 2 5. Jet nozzle; 26. Pipe support; 27. Discharge pipe; 28. Three-way valve. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0030] As mentioned in the background technology, in the hydrometallurgical process, the dissolution effect of sulfur dioxide directly affects the degree and speed of the reduction reaction. If the dissolution effect is not good, it will not only reduce the reaction efficiency, but also increase the consumption of sulfur dioxide, and even cause sulfur dioxide leakage, posing a potential threat to the environment and the health of operators. In addition, since the consumption of sulfur dioxide during the reaction is large, if it cannot be replenished in time, it will also affect the continuation of the reaction.

[0031] In order to solve this technical problem, the utility model provides a reaction device for sulfur dioxide and positive electrode powder slurry of waste lithium battery.

[0032] Specifically, please refer to Figure 1-Figure 2 The reaction device of sulfur dioxide and waste lithium battery positive electrode powder slurry liquid specifically includes:

[0033] A reaction tank 1, wherein an annular air inlet mechanism 9 is provided in the reaction tank 1, a third feed port 16 and an exhaust port 18 are provided at the top of the reaction tank 1, a first discharge port 11 is provided at the bottom of the reaction tank 1, and a stirring assembly is installed inside the reaction tank 1;

[0034] A sulfur dioxide air inlet box 2, a second feed port 13 is provided on the top of the sulfur dioxide air inlet box 2, a fourth discharge port 15 is provided on the bottom of the sulfur dioxide air inlet box 2, a second air inlet 19 is provided on the side of the sulfur dioxide air inlet box 2, a connecting pipe is provided between the second feed port 13 and the fourth discharge port 15, an ejector 14 is installed on the connecting pipe, and the fourth discharge port 15 is connected to the third feed port 16, and the second air inlet 19 is connected to the exhaust port 18, so as to form a circulation of sulfur dioxide;

[0035] The gas mixing chamber 3 has a gas outlet 22 at its bottom, and the gas outlet 22 is communicated with the annular gas inlet mechanism 9 .

[0036] The utility model provides a reaction device for sulfur dioxide and waste lithium battery positive electrode powder slurry. The device realizes efficient mixing and full dissolution of sulfur dioxide and waste lithium battery positive electrode powder slurry through a well-designed reaction tank 1, a sulfur dioxide air inlet box 2 and a gas mixing chamber 3, combined with a stirring assembly, a spoiler 6, an annular air inlet mechanism 9 and jet nozzles 2 5 and other components, thereby ensuring rapid and efficient reaction. At the same time, through a sulfur dioxide circulation system, continuous and stable supply and economical utilization of sulfur dioxide are realized, effectively reducing waste and leakage risks. In addition, the device is simple to operate and easy to realize automated operation, thereby reducing the complexity and difficulty of manual operation and improving work efficiency.

[0037] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] Example 1, please refer to Figure 1-Figure 2 , a reaction device for sulfur dioxide and waste lithium battery positive electrode powder slurry, comprising:

[0041] A reaction tank 1, wherein an annular air inlet mechanism 9 is provided in the reaction tank 1, a third feed port 16 and an exhaust port 18 are provided at the top of the reaction tank 1, a first discharge port 11 is provided at the bottom of the reaction tank 1, and a stirring assembly is installed inside the reaction tank 1;

[0042] A sulfur dioxide air inlet box 2 is provided with a second feed port 13 at the top of the sulfur dioxide air inlet box 2, a fourth discharge port 15 at the bottom of the sulfur dioxide air inlet box 2, a second air inlet 19 at the side of the sulfur dioxide air inlet box 2, a connecting pipe is provided between the second feed port 13 and the fourth discharge port 15, an ejector 14 is installed on the connecting pipe, and the fourth discharge port 15 is connected to the third feed port 16, and the second air inlet 19 is connected to the exhaust port 18, so as to form a sulfur dioxide circulation system, so that sulfur dioxide circulates into the sulfur dioxide air inlet box 2 and is sucked into the water by the ejector 14;

[0043] A gas mixing chamber 3, the bottom of which is provided with an air outlet 22, the air outlet 22 is connected to an annular air inlet mechanism 9. The device realizes efficient mixing and full dissolution of sulfur dioxide and waste lithium battery positive electrode powder slurry through a well-designed reaction tank 1, sulfur dioxide air inlet box 2 and gas mixing chamber 3, combined with a stirring assembly, a spoiler 6, an annular air inlet mechanism 9 and a jet nozzle 25, thereby ensuring rapid and efficient reaction. At the same time, through the circulation system of sulfur dioxide, continuous and stable supply and economical utilization of sulfur dioxide are realized, effectively reducing waste and leakage risks. In addition, the device is simple to operate and easy to realize automated operation, which reduces the complexity and difficulty of manual operation and improves work efficiency.

[0044] Further, such as Figure 1-Figure 2 As shown, the stirring assembly includes a stirring paddle motor 4 fixedly installed on the top of the reaction tank 1, and the stirring paddle motor 4 is connected to a stirring paddle body 5 located in the reaction tank 1. The stirring paddle body 5 is stirred by the stirring paddle motor 4, which can improve the uniformity of mixing, improve the dissolution effect and the reaction efficiency. This design helps to speed up the reaction speed and further improve the production capacity of the device.

[0045] Further, such as Figure 1-Figure 2 As shown, a spoiler 6 is provided on the inner wall of the reaction tank 1, and a first feed port 7 is also provided on the top of the reaction tank 1. The presence of the spoiler 6 can also reduce dead angles during the stirring process, ensuring that the materials can fully contact and react.

[0046] Example 2, the reaction device of sulfur dioxide and waste lithium battery positive electrode powder slurry provided in Example 1 is further optimized, specifically, Figure 3 The annular air inlet mechanism 9 shown includes an annular tube 24 arranged in the reaction tank 1, the annular tube 24 is connected to the air inlet pipe 23, one end of the air inlet pipe 23 passes through the reaction tank 1, and the bottom of the annular tube 24 is connected to a plurality of jet nozzles 25. The design of the annular tube 24 and the jet nozzles 25 enables sulfur dioxide to be more evenly distributed in the slurry, thereby improving the dissolution effect and reaction efficiency. This design not only reduces the waste of sulfur dioxide, but also reduces the risk of leakage.

[0047] Furthermore, the bottom end of the jet nozzle 25 is tilted 45° to the left and 45° outward, and a plurality of pipe supports 26 are installed between the annular tube 24 and the inner wall of the reaction tank 1. The tilt angle design of the jet nozzle 25 helps prevent liquid reflux and ensures stable operation of the device.

[0048] Furthermore, the gas outlet 22 is connected to the gas inlet pipe 23, and a check valve is provided between the gas outlet 22 and the gas inlet pipe 23 to prevent liquid reflux. The design of the gas outlet 22, the gas inlet pipe 23 and the check valve makes the circulation system of sulfur dioxide more perfect. The addition of the check valve effectively prevents liquid reflux, ensures the purity and reaction effect of sulfur dioxide, and this design improves the utilization rate of sulfur dioxide, reduces production costs, and also reduces potential impacts on the environment.

[0049] Further, such as Figure 1-Figure 2 As shown, the first discharge port 11 is connected to the second feed port 13 by a pipeline, and a mortar pump 12 is provided on the pipeline. The mortar pump 12 is used to transport the material to the sulfur dioxide inlet box 2. After the material inhales sulfur dioxide in the sulfur dioxide inlet box 2 by using the ejector 14, it returns to the reaction tank 1. A three-way valve 28 is connected between the fourth discharge port 15 and the third feed port 16. The three-way valve 28 is connected to the discharge pipe 27. The design of the mortar pump 12 and the three-way valve 28 makes the material transportation and circulation process more automated and intelligent. This design reduces the complexity of manual operation and improves work efficiency. At the same time, the addition of the three-way valve 28 makes the material circulation more flexible and can be adjusted according to actual needs, thereby improving the adaptability and flexibility of the device.

[0050] Embodiment 3, the reaction device of sulfur dioxide and waste lithium battery positive electrode powder slurry provided in Embodiment 1 or 2 is further optimized. Specifically, a first air inlet 17 is further provided on the top of the sulfur dioxide air inlet box 2, and a third air inlet 20 and a fourth air inlet 21 are provided on the top of the gas mixing chamber 3. The design of the first air inlet 17, the third air inlet 20 and the fourth air inlet 21 provides more air inlet options for the device. This design enables the device to flexibly adjust the supply mode and amount of sulfur dioxide according to actual needs, thereby improving the adaptability and flexibility of the device. At the same time, the increase of these air inlets also facilitates the maintenance and maintenance of the device.

[0051] The use process of the reaction device of sulfur dioxide and waste lithium battery positive electrode powder slurry provided by the utility model is as follows:

[0052] 1. Reaction feeding: The pre-treated slurry enters the reaction tank 1 through the first feeding port 7. After the feeding is completed, the stirring paddle motor 4 is turned on so that the stirring paddle body 5 stirs the material;

[0053] 2. Ventilation reaction and reaction heating: Since the slurry does not contain sulfur dioxide at the beginning, the dissolution rate of sulfur dioxide is fast. Directly introducing sulfur dioxide into the air will make the dissolution faster. At the same time, sulfur dioxide mixed with steam and then introduced into the reactor will make the sulfur dioxide dissolve more evenly. Therefore, sulfur dioxide and steam are mixed in the gas mixing chamber 3 in proportion and directly passed through the air intake pipe 23. The slurry is ventilated by the annular air intake mechanism 9. The annular air intake mechanism 9 can make the gas more evenly distributed in the slurry, which is convenient for mixing and dissolving. The mixing of the two gases makes the ventilation volume large. Through pressurized transportation and discharge from the jet nozzle 25, the gas has a large thrust. The jet nozzle 2 5 is evenly distributed on the annular tube 24, and its direction is offset 45° to the left and 45° to the outside, which can drive the stirring paddle body 5 to rotate and stir, promote gas-liquid mixing, and at the same time, its direction can drive the materials that may be deposited in the corners of the reaction tank 1, reduce the deposition of solids, and promote uniform mixing of solids and liquids. After 20 minutes, the sulfur dioxide content in the slurry is relatively high, and the dissolution effect of directly introducing sulfur dioxide is poor. Therefore, sulfur dioxide is no longer introduced into the gas mixing chamber 3, and only steam is introduced to maintain the reaction temperature. Sulfur dioxide is replaced by sulfur dioxide air inlet box 2 for intake. The mortar pump 12 is turned on. The slurry passes through the sulfur dioxide air inlet box 2 and is sucked and mixed with sulfur dioxide for 1.5 hours through the ejector 14. This method can maintain a high content of sulfur dioxide in the slurry. The exhaust port 18 is connected to the second air inlet 19, and sulfur dioxide is sucked into the sulfur dioxide air inlet box 2 for cyclic intake. The sulfur dioxide air inlet box 2 passes through the first air inlet 1 7 Continuously fill sulfur dioxide and maintain the sulfur dioxide inlet box 2 with a pressure lower than the external atmospheric pressure, so as to recover the gas in the reaction tank 1 and prevent gas leakage;

[0054] 3. Discharging after the reaction is completed: After the reaction is completed, the introduction of steam and sulfur dioxide is stopped, and the three-way valve 28 is controlled to make the discharge pipe 27 conductive, while the fourth discharge port 15 and the third feed port 16 are closed. The slurry is sequentially transported from the second feed port 13 to the discharge pipe 27 by the mortar pump 12 and discharged into the lower reaction tank. At the same time, the exhaust gas in the reaction device is absorbed by the ejector 14 and separated and treated in the lower reaction tank.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A reaction device for sulfur dioxide and waste lithium battery positive electrode powder slurry, characterized in that: include: A reaction tank (1), wherein an annular air inlet mechanism (9) is provided in the reaction tank (1), a third feed port (16) and an air outlet (18) are provided at the top of the reaction tank (1), a first discharge port (11) is provided at the bottom of the reaction tank (1), and a stirring assembly is installed inside the reaction tank (1); A sulfur dioxide air inlet box (2), wherein a second feed port (13) is provided at the top of the sulfur dioxide air inlet box (2), a fourth discharge port (15) is provided at the bottom of the sulfur dioxide air inlet box (2), a second air inlet (19) is provided at the side of the sulfur dioxide air inlet box (2), a connecting pipe is provided between the second feed port (13) and the fourth discharge port (15), an ejector (14) is installed on the connecting pipe, and the fourth discharge port (15) is connected to the third feed port (16), and the second air inlet (19) is connected to the exhaust port (18), so as to form a circulation of sulfur dioxide; A gas mixing chamber (3), wherein a gas outlet (22) is provided at the bottom of the gas mixing chamber (3), and the gas outlet (22) is connected to the annular gas inlet mechanism (9).

2. The reaction device of sulfur dioxide and waste lithium battery positive electrode powder slurry according to claim 1, characterized in that: The stirring assembly comprises a stirring paddle motor (4) fixedly mounted on the top of the reaction tank (1); the stirring paddle motor (4) is connected to a stirring paddle body (5) located in the reaction tank (1).

3. The reaction device of sulfur dioxide and waste lithium battery positive electrode powder slurry according to claim 2, characterized in that: A spoiler (6) is provided on the inner wall of the reaction tank (1), and a first feed port (7) is also provided on the top of the reaction tank (1).

4. The reaction device of sulfur dioxide and waste lithium battery positive electrode powder slurry according to claim 3, characterized in that: The annular air intake mechanism (9) comprises an annular tube (24) arranged in the reaction tank (1), the annular tube (24) being connected to an air intake pipe (23), one end of the air intake pipe (23) passing through the reaction tank (1), and a plurality of jet nozzles (25) being connected to the bottom of the annular tube (24).

5. The reaction device of sulfur dioxide and waste lithium battery positive electrode powder slurry according to claim 4, characterized in that: The bottom end of the jet nozzle (25) is inclined 45 degrees to the left and 45 degrees outwards, and a plurality of pipe supports (26) are installed between the annular pipe (24) and the inner wall of the reaction tank (1).

6. The reaction device of sulfur dioxide and waste lithium battery positive electrode powder slurry according to claim 5, characterized in that: The air outlet (22) is in communication with an air inlet pipeline (23), and a check valve is provided between the air outlet (22) and the air inlet pipeline (23).

7. The reaction device of sulfur dioxide and waste lithium battery positive electrode powder slurry according to claim 6, characterized in that: The first discharge port (11) and the second feed port (13) are connected via a pipeline, and a mortar pump (12) is provided on the pipeline. The mortar pump (12) is used to transport the material to the sulfur dioxide inlet box (2). After the material inhales sulfur dioxide in the sulfur dioxide inlet box (2) through an ejector (14), it returns to the reaction tank (1).

8. The reaction device for sulfur dioxide and waste lithium battery positive electrode powder slurry according to claim 7, characterized in that: A three-way valve (28) is connected between the fourth discharge port (15) and the third feed port (16), and the three-way valve (28) is connected to a discharge pipe (27).

9. The reaction device for sulfur dioxide and waste lithium battery positive electrode powder slurry according to claim 8, characterized in that: The top of the sulfur dioxide air inlet box (2) is also provided with a first air inlet (17).

10. The device for reacting sulfur dioxide with waste lithium battery positive electrode powder slurry according to claim 9, characterized in that: The top of the gas mixing chamber (3) is provided with a third air inlet (20) and a fourth air inlet (21).

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