Lithium precipitation reaction device

Abstract

The utility model provides a lithium precipitation reaction device. The lithium precipitation reaction device comprises a reaction tank body, a heating coil, a stirrer, a guide plate and a sprayer; the reaction tank body is provided with a hollow inner cavity; the heating coil spirally surrounds the periphery of the reaction tank body; the stirrer extends into the inner cavity from the top end of the reaction tank body; the guide plate extends into the inner cavity from the top end of the reaction tank body, and the guide plate and the stirrer are distributed at an interval and extend in parallel; the sprayer extends into the inner cavity from the top end of the reaction tank body and faces the bottom end of the reaction tank body. According to the embodiment of the invention, the stirrer and the guide plate are designed in the reaction tank body, so that materials can sink at the bottom, material circulation is formed, the materials can flow at different speeds, turbulent flow is formed, sufficient contact between the reaction materials and diffusion of the materials are facilitated, and the reaction rate is increased; the retention time of impurities on the surface of lithium carbonate can be shortened, the impurity wrapping amount is reduced, and the quality of lithium carbonate can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery recycling, and in particular to a lithium precipitation reaction device. Background Art

[0002] The lithium precipitation reaction device is used to produce lithium carbonate by reacting lithium sulfate solution with sodium carbonate. This reaction is called lithium precipitation reaction, which converts lithium in lithium sulfate into lithium carbonate, wherein the lithium sulfate solution contains sodium sulfate.

[0003] At present, conventional lithium precipitation reaction devices use stirring reaction, the stirring tank is made of plastic or stainless steel, the heating coil is heated by built-in coil, and there are many types of stirring blades. When the conventional lithium precipitation reaction device is used, the lithium carbonate generated by the reaction is easy to form scars on the tank body and stirring paddle, resulting in a decrease in the yield of lithium carbonate. The conventional lithium precipitation reaction device is difficult to discharge and cannot be completely discharged. The tank body is difficult to clean. The lithium carbonate scars accumulate in the reaction device, affecting the subsequent reaction efficiency and increasing the load of the equipment. The reaction effect of the lithium precipitation reaction device is poor, which is manifested in the long lithium precipitation reaction time. The lithium carbonate generated by the reaction is easy to contain impurities such as sodium sulfate and sodium carbonate, resulting in low quality of the output lithium carbonate.

[0004] In summary, the existing lithium precipitation reaction device has technical problems such as long reaction time and low product quality. Utility Model Content

[0005] In view of the shortcomings of the existing methods, the present application proposes a lithium precipitation reaction device to solve the technical problems of long reaction time and low product quality in the prior art.

[0006] The present application provides a lithium precipitation reaction device, including a reaction tank, a heating coil, an agitator, a guide plate and a sprayer:

[0007] A reaction tank body having a hollow inner cavity;

[0008] A heating coil spirally surrounds the periphery of the reaction tank;

[0009] A stirrer extends from the top of the reaction tank into the inner cavity;

[0010] A guide plate extends from the top of the reaction tank into the inner cavity, and the guide plate and the agitator are spaced apart and extend parallel to each other;

[0011] A sprayer extends from the top end of the reaction tank into the inner cavity and toward the bottom end of the reaction tank.

[0012] In some embodiments of the present application, the top end of the reaction tank body has a guide plate installation port, a first feed port and a second feed port, and the bottom end of the reaction tank body has a discharge port.

[0013] In some embodiments of the present application, the guide plate is installed at the guide plate installation port of the reaction tank body, and the horizontal position of the guide plate installation port is located at the midpoint between the central axis of the reaction tank body and the side wall of the reaction tank body.

[0014] In some embodiments of the present application, a plurality of nozzles are further included. The sprayer is installed at the first feed port and is annular. The plurality of nozzles are distributed along the axial direction of the sprayer and are all directed toward the bottom end of the reaction tank.

[0015] In some embodiments of the present application, the heating coil has a steam inlet and a hot water outlet, the spiral radius of the heating coil is larger than the radius of the reaction tank body, the steam inlet and the hot water outlet are located on opposite sides of the reaction tank body and the position of the steam inlet is higher than the position of the hot water outlet.

[0016] In some embodiments of the present application, the ambient temperature of the inner cavity of the reaction tank is 90°C~95°C.

[0017] In some embodiments of the present application, the agitator includes a stirring shaft, a first stirring blade and a second stirring blade, the stirring shaft extends along the axis of the reaction tank body, the position of the first stirring blade is lower than the position of the second stirring blade, the head ends of both are fixedly connected to the stirring shaft, and the tail ends of both extend along the stirring shaft toward the side wall of the reaction tank body.

[0018] In some embodiments of the present application, the bottom end of the reaction tank body is an arc-shaped surface, the longitudinal section of the first stirring blade is a crescent shape, and the lower contour of the crescent shape matches the shape of the bottom end of the reaction tank body.

[0019] In some embodiments of the present application, the first stirring blade and the second stirring blade are deflected clockwise or counterclockwise by a certain angle compared to a horizontal plane, and the angle is 40° to 50°.

[0020] In some embodiments of the present application, the number of the first stirring blades and the number of the second stirring blades are both multiple, the multiple first stirring blades are arranged in the same layer around the stirring shaft and the angles between adjacent first stirring blades are equal, and the multiple second stirring blades are evenly arranged in the same layer around the stirring shaft and the angles between adjacent second stirring blades are equal.

[0021] The beneficial technical effects brought about by the technical solution provided in the embodiment of the present application include: the embodiment of the present application designs an agitator and a guide plate in the reaction tank body, the agitator stirs the material in the tank, the guide plate can slow down the flow of the outer layer material into the inner layer, which is conducive to the material sinking to the bottom and forming material circulation, and the guide plate can make the material flow at different speeds and form turbulence, which is conducive to full contact between the reaction materials and the diffusion of the materials, thereby increasing the reaction rate. Due to the accelerated diffusion rate of the materials, the residence time of impurities on the surface of lithium carbonate can be reduced, the amount of impurity wrapping can be reduced, and the lithium carbonate generated by the reaction is not easy to scar, thereby improving the quality of lithium carbonate.

[0022] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0024] Figure 1 This is a schematic diagram of the structure of a lithium precipitation reaction device in an embodiment of the present application.

[0025] Reference numerals:

[0026] 1-reaction tank, 2-heating coil, 3-agitator, 4-guide plate, 5-sprinkler;

[0027] 11- guide plate installation port, 12- first feed port, 13- second feed port, 14- discharge port, 21- steam inlet, 22- hot water outlet, 31- first stirring blade, 32- second stirring blade. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the implementation methods described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0029] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements, and / or components, but does not exclude the implementation of other features, information, data, steps, operations, elements, components, and / or combinations thereof supported by the technical field. It should be understood that when we refer to an element as being "connected" to another element, the element may be directly connected to the other element, or may refer to a connection relationship between the element and the other element established through an intermediate element. In addition, the "connection" used herein may include a wireless connection.

[0030] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be noted that the following implementation methods can refer to, learn from or combine with each other, and the same terms, similar features and similar implementation steps in different implementation methods will not be described repeatedly.

[0031] In view of the shortcomings of the existing methods, the present application proposes a lithium precipitation reaction device to solve the technical problems of long reaction time and low product quality in the prior art.

[0032] The present application embodiment provides a lithium precipitation reaction device, such as Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a lithium precipitation reaction device in an embodiment of the present application.

[0033] A lithium precipitation reaction device comprises a reaction tank body 1, a heating coil 2, an agitator 3, a guide plate 4 and a sprayer 5:

[0034] The reaction tank body 1 has a hollow inner cavity;

[0035] A heating coil 2 spirally surrounds the periphery of the reaction tank 1;

[0036] A stirrer 3 extends from the top of the reaction tank body 1 into the inner cavity;

[0037] A guide plate 4 extends from the top of the reaction tank body 1 into the inner cavity, and the guide plate 4 and the agitator 3 are spaced apart and extend parallel to each other;

[0038] The sprayer 5 extends from the top end of the reaction tank body 1 into the inner cavity and toward the bottom end of the reaction tank body 1 .

[0039] In the embodiment of the present application, an agitator 3 and a guide plate 4 are designed in the reaction tank body 1. The agitator 3 stirs the material in the tank, and the guide plate 4 can slow down the flow of the outer layer material into the inner layer, which is conducive to the material sinking to the bottom and forming material circulation. The guide plate 4 can make the material flow at different speeds and form turbulence, which is conducive to full contact between the reaction materials and the diffusion of the materials, thereby increasing the reaction rate. Since the diffusion rate of the materials is accelerated, the residence time of impurities on the surface of lithium carbonate can be reduced, the amount of impurity wrapping can be reduced, and the lithium carbonate generated by the reaction is not easy to scar, which can improve the quality of lithium carbonate.

[0040] In some embodiments of the present application, the top end of the reaction tank body 1 has a guide plate installation port 11, a first feed port 12 and a second feed port 13, and the bottom end of the reaction tank body 1 has a discharge port 14.

[0041] In some embodiments of the present application, the guide plate 4 is installed at the guide plate installation port 11 of the reaction tank body 1, and the horizontal position of the guide plate installation port 11 is located at the midpoint between the central axis of the reaction tank body 1 and the side wall of the reaction tank body 1.

[0042] In this embodiment, the guide plate 4 is detachable for easy cleaning.

[0043] The guide plate 4 can slow down the flow of the outer layer material into the inner layer, which is conducive to the material sinking to the bottom and forming material circulation. The baffle can make the material flow at different speeds and form turbulence, which is conducive to full contact between the reaction materials and the diffusion of the materials, thereby increasing the reaction rate. Since the material diffusion speed is accelerated, the residence time of impurities on the surface of lithium carbonate can be reduced, the amount of impurity wrapping can be reduced, and the quality of lithium carbonate can be improved.

[0044] In some embodiments of the present application, a plurality of nozzles are further included. The sprayer 5 is installed at the first feed port 12 and is annular. The plurality of nozzles are distributed along the axial direction of the sprayer 5 and are all directed toward the bottom end of the reaction tank body 1 .

[0045] In this embodiment, the sprayer 5 is annular in shape and has nozzles evenly distributed thereon, so that the material is sprayed in a mist form, which is beneficial for the uniform distribution of the added material and makes the reaction more uniform.

[0046] In some embodiments of the present application, the heating coil 2 has a steam inlet 21 and a hot water outlet 22, the spiral radius of the heating coil 2 is greater than the radius of the reaction tank body 1, the steam inlet 21 and the hot water outlet 22 are located on opposite sides of the reaction tank body 1 and the position of the steam inlet 21 is higher than the position of the hot water outlet 22.

[0047] In some embodiments of the present application, the ambient temperature of the inner cavity of the reaction tank body 1 is 90°C~95°C.

[0048] In this embodiment, hot steam is introduced into the steam inlet 21 of the heating coil 2 through a high-temperature hot air blower. There is a temperature difference between the hot steam and the tube wall of the heating coil 2. The hot steam contacts the tube wall of the heating coil 2 to release heat. The heating coil 2 then transfers the heat to the reaction tank body 1 and the interior of the reaction tank body 1 to increase the temperature of the material, thereby increasing the reaction rate between the materials.

[0049] In some embodiments of the present application, the agitator 3 includes a stirring shaft, a first stirring blade 31 and a second stirring blade 32, the stirring shaft extends along the axis of the reaction tank body 1, the position of the first stirring blade 31 is lower than the position of the second stirring blade 32, the head ends of both are fixedly connected to the stirring shaft, and the tail ends of both extend along the stirring shaft toward the side wall of the reaction tank body 1.

[0050] In this embodiment, the agitator 3 is designed to have at least two layers of blades, which is conducive to the full diffusion reaction of the material. The upper blade of the agitator 3 is located in the middle of the reaction tank body 1, and cooperates with the guide plate 4, and the guide plate 4 is located at the center between the agitator 3 and the reaction tank body 1. The stirring effect can be enhanced, so that the material is conducive to sinking to the bottom for circulation, avoiding the material from flowing at the same speed, allowing the material to fully diffuse and react, and making it difficult for the lithium carbonate generated by the reaction to form scars.

[0051] Here, two layers of blades are taken as an example. In fact, three layers of blades or even more layers of blades are also within the protection scope of this application.

[0052] In some embodiments of the present application, the bottom end of the reaction tank body 1 is an arc-shaped surface, and the longitudinal section of the first stirring blade 31 is crescent-shaped, and the lower contour of the crescent shape matches the shape of the bottom end of the reaction tank body 1.

[0053] In this embodiment, the inner side of the reaction tank body 1 and the stirring paddle are treated with enamel to make the part in contact with the material smooth and not easy to scar, so as to solve the problems of lithium carbonate scarring, inability to completely discharge the material, and difficulty in cleaning the tank body. The bottom end of the reaction tank body 1 is in an arc shape, with the lowest point as the discharge port 14. The stirrer 3 has multiple layers of blades, and the bottom blades are close to the bottom end of the reaction tank body 1, all in an arc shape, to avoid scarring at the bottom during the reaction, so that the material can be discharged smoothly.

[0054] In some embodiments of the present application, the first stirring blade 31 and the second stirring blade 32 are deflected clockwise or counterclockwise by a certain angle compared to a horizontal plane, and the angle is 40° to 50°.

[0055] In this embodiment, if the multi-layer blades are parallel to the horizontal plane, the contact surface area between the blades and the material is too small when the blades rotate, and the blades are difficult to drive a large amount of material to rotate, the mixing and diffusion efficiency of the material is low, and the reaction rate is insufficient; if the multi-layer blades are parallel to the vertical plane, the contact surface area between the blades and the material is too large when the blades rotate, the resistance that the blades need to overcome is large, the motor requirements are high, and the production cost increases. If the multi-layer blades are all deflected at a certain angle, the material can provide appropriate shear force, while reducing energy consumption, ensuring good fluidity and mixing efficiency.

[0056] In some embodiments of the present application, the number of the first stirring blades 31 and the number of the second stirring blades 32 are both multiple, and the multiple first stirring blades 31 are arranged in the same layer around the stirring shaft, and the angles between adjacent first stirring blades 31 are equal, and the multiple second stirring blades 32 are evenly arranged in the same layer around the stirring shaft, and the angles between adjacent second stirring blades 32 are equal.

[0057] Compared with the prior art, the application of the embodiments of the present application can at least achieve the following beneficial effects: the embodiments of the present application design an agitator 3 and a guide plate 4 in the reaction tank body 1, the agitator 3 stirs the material in the tank, the guide plate 4 can slow down the flow of the outer layer material into the inner layer, which is conducive to the material sinking to the bottom and forming material circulation, the guide plate 4 can make the material flow at different speeds and form turbulence, which is conducive to full contact between the reaction materials and the diffusion of the materials, and increases the reaction rate. Since the diffusion rate of the materials is accelerated, the residence time of impurities on the surface of lithium carbonate can be reduced, the amount of impurity wrapping can be reduced, and the lithium carbonate generated by the reaction is not easy to scar, which can improve the quality of lithium carbonate.

[0058] In the description of the present application, the directions or positional relationships indicated by words such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the exemplary directions or positional relationships shown in the accompanying drawings. They are for the convenience of describing or simplifying the description of the embodiments of the present application, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0059] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0060] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0061] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0062] The above is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the scheme of the present application, other similar implementation methods based on the technical ideas of the present application are also within the protection scope of the embodiments of the present application.

Claims

1. A lithium precipitation reaction device, characterized in that: include: A reaction tank body having a hollow inner cavity; A heating coil spirally surrounds the periphery of the reaction tank; A stirrer extends from the top of the reaction tank into the inner cavity; A guide plate extends from the top of the reaction tank into the inner cavity, and the guide plate and the agitator are spaced apart and extend parallel to each other; A sprayer extends from the top end of the reaction tank into the inner cavity and toward the bottom end of the reaction tank.

2. The lithium precipitation reaction device according to claim 1, characterized in that: The top end of the reaction tank body is provided with a guide plate installation port, a first feed port and a second feed port, and the bottom end of the reaction tank body is provided with a discharge port.

3. The lithium precipitation reaction device according to claim 2, characterized in that: The guide plate is installed at the guide plate installation opening of the reaction tank body, and the horizontal position of the guide plate installation opening is located at the midpoint between the central axis of the reaction tank body and the side wall of the reaction tank body.

4. The lithium precipitation reaction device according to claim 2, characterized in that: It also includes a plurality of spray heads, which are installed at the first feed port and are annular in shape. The plurality of spray heads are distributed along the axial direction of the spray head and are all directed toward the bottom end of the reaction tank body.

5. The lithium precipitation reaction device according to claim 1, characterized in that: The heating coil has a steam inlet and a hot water outlet. The spiral radius of the heating coil is greater than the radius of the reaction tank body. The steam inlet and the hot water outlet are located on opposite sides of the reaction tank body and the position of the steam inlet is higher than the position of the hot water outlet.

6. The lithium precipitation reaction device according to claim 4, characterized in that: The ambient temperature of the inner cavity of the reaction tank is 90°C to 95°C.

7. The lithium precipitation reaction device according to claim 1, characterized in that: The agitator includes a stirring shaft, a first stirring blade and a second stirring blade. The stirring shaft extends along the axis of the reaction tank body. The position of the first stirring blade is lower than that of the second stirring blade. The head ends of both stirring blades are fixedly connected to the stirring shaft, and the tail ends of both stirring blades extend along the stirring shaft toward the side wall of the reaction tank body.

8. The lithium precipitation reaction device according to claim 7, characterized in that: The bottom end of the reaction tank body is an arc-shaped surface, and the longitudinal section of the first stirring blade is a crescent shape, and the lower contour of the crescent shape matches the shape of the bottom end of the reaction tank body.

9. The lithium precipitation reaction device according to claim 7, characterized in that: The first stirring blade and the second stirring blade are deflected clockwise or counterclockwise by a certain angle compared to a horizontal plane, and the angle is 40° to 50°.

10. The lithium precipitation reaction device according to claim 7, characterized in that: The number of the first stirring blades and the number of the second stirring blades are both multiple, the multiple first stirring blades are arranged in the same layer around the stirring shaft, and the angles between adjacent first stirring blades are equal, and the multiple second stirring blades are evenly arranged in the same layer around the stirring shaft, and the angles between adjacent second stirring blades are equal.

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