Lithium carbonate heat recovery mother liquor tank with efficient cooling function

Abstract

The utility model discloses a lithium carbonate heat recovery mother liquor tank with an efficient cooling function, and relates to the related technical field of lithium battery production. The heat exchanger comprises a working bin, an inner heat exchange plate and a gas transmission frame, a plurality of heat exchange square pipes are fixed to the upper portion in the working bin in a penetrating mode, the gas transmission frame is fixed to one end of the working bin and arranged on the outer sides of the heat exchange square pipes, the inner heat exchange plate is fixed to the bottom in the working bin, and a heat exchange coil pipe is fixed in the inner heat exchange plate. By arranging the working bin, the inner heat exchange plate and the gas conveying frame, the lithium carbonate mother liquor tank solves the problems that the lithium carbonate mother liquor tank is low in heat utilization rate of a solution entering the lithium carbonate mother liquor tank and low in solution cooling rate, and has the advantages that the lithium carbonate mother liquor tank is higher in heat utilization rate of the solution entering the lithium carbonate mother liquor tank, and the solution cooling rate is higher.

Description

Technical Field

[0001] This utility model belongs to the technical field of lithium battery production, and in particular relates to a highly efficient cooling lithium carbonate heat recovery mother liquor tank. Background Technology

[0002] Lithium carbonate mother liquor tanks are key equipment in lithium salt production, primarily used for storing, processing, and recycling the residual mother liquor after precipitation or crystallization. Their core functions include collecting lithium-ion-containing mother liquor, improving lithium recovery rates, adjusting process parameters (such as pH, concentration, and temperature), and environmentally treating impurities. The design of mother liquor tanks requires careful attention to material selection and structural optimization, typically employing corrosion-resistant materials (such as PP, PVC, 316L stainless steel, or fiberglass) to resist corrosion from acidic or alkaline media. However, lithium carbonate mother liquor tanks still have the following drawbacks in practical use:

[0003] When lithium carbonate mother liquor tank is in operation, the temperature of the solution entering it is relatively high. Direct cooling through heat dissipation equipment results in a slow cooling rate, and the heat of the solution in the lithium carbonate mother liquor tank is wasted, affecting the energy utilization rate in production.

[0004] Secondly, during operation, the heat dissipation structure of the lithium carbonate mother liquor tank is located externally to cool the solution in the mother liquor tank. However, as the operation progresses, the efficiency of cooling by blowing air or outputting the solution is relatively low, resulting in low cooling efficiency in the mother liquor tank. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency cooling lithium carbonate heat recovery mother liquor tank. By setting up a working chamber, an internal heat exchange plate and a gas conveying frame, it solves the problems of low heat utilization rate of the solution entering the lithium carbonate mother liquor tank and low cooling rate of the solution.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a high-efficiency cooling lithium carbonate heat recovery mother liquor tank, comprising a working chamber, an inner heat exchange plate, and a gas conveying frame. Several heat exchange square tubes are fixedly installed through the upper part of the working chamber. A gas conveying frame is fixed at one end of the working chamber and is located outside the heat exchange square tubes. An inner heat exchange plate is fixed at the bottom of the working chamber, and a heat exchange coil is fixed inside the inner heat exchange plate. During operation, the processed lithium carbonate solution is retained in the working chamber, and the heat exchange coil is fixed within it by the inner heat exchange plate. As the heat exchange coil passes through the fluid, it recovers the heat from the lithium carbonate solution in the working chamber. Cooled air is then conveyed to the heat exchange square tubes through the gas conveying frame.

[0008] Furthermore, a thermal switch one and a thermal switch two are fixed on one side of the inner wall of the working chamber. The thermal switch one and the thermal switch two are at the same height. Thermal switches one and the thermal switch two of the same height are installed on both sides of the inner wall of the working chamber for temperature graded control. When the solution temperature drops to 50°C, thermal switch one triggers the shutdown of the heat exchange system and starts the air cooling. When the temperature continues to drop to 20-30°C, thermal switch two shuts off the air cooling and starts the solution discharge.

[0009] Furthermore, the heat exchange square tubes are arranged parallel to each other in the working chamber, and the spacing between adjacent heat exchange square tubes is equal. The heat exchange square tubes in the working chamber are arranged in a parallel layout with equal spacing to ensure uniform distribution of cooling air and improve the heat dissipation efficiency of high-temperature lithium carbonate solution.

[0010] Furthermore, the lower part of the working chamber away from the gas delivery frame is symmetrically connected to a delivery pipe. Each delivery pipe is fixed with an electric control valve on its periphery. The height of the delivery pipe is higher than the height of the inner heat exchange plate. The lower part of the working chamber is symmetrically provided with delivery pipes equipped with electric control valves. Their installation position is higher than the inner heat exchange plate, realizing the physical isolation between the solution delivery and heat recovery systems. The dual valve control can connect to the solution input / output devices respectively.

[0011] Furthermore, one end of the heat exchange coil is fixedly connected to an input pipe, and the end of the heat exchange coil away from the input pipe is fixedly connected to an output pipe. Both the input pipe and the output pipe pass through the working chamber. Electric control valves are fixed around the input pipe and the output pipe on the outside of the working chamber. The inner heat exchange plate is located below the heat exchange square tube. The heat exchange coil passes through the working chamber through the input / output pipe. The external electric control valve controls the circulation of the heat medium. The inner heat exchange plate is located below the heat exchange square tube, forming a "heat recovery-air cooling" double-layer cooling structure, which preferentially recovers waste heat above 50°C.

[0012] Furthermore, a built-in fan is fixed inside the gas delivery frame. Both ends of the gas delivery frame are open and face the heat exchange square tube. The gas delivery frame is equipped with a built-in fan with bidirectional openings, which directly delivers air to the heat exchange square tube. Forced convection accelerates the cooling of the solution. It is linked with a thermal switch to achieve automatic start and stop, and precise energy consumption control.

[0013] This utility model has the following beneficial effects:

[0014] This invention solves the problem of low heat utilization rate of the lithium carbonate mother liquor tank by setting up a working chamber and an internal heat exchange plate. The heat exchange medium is transported to the heat exchange coil through the input pipe. When the heat exchange medium passes through the heat exchange coil, the heat in the lithium carbonate solution in the working chamber is transferred to the heat exchange coil through the internal heat exchange plate, and then transferred to the heat exchange fluid passing through it. After heat exchange, it is transported to the output pipe and output to the equipment that uses the heat. The heat in the lithium carbonate solution in the working chamber is recovered, making the lithium carbonate mother liquor tank more efficient in utilizing the heat of the solution entering it and convenient to use.

[0015] This invention solves the problem of low cooling rate of the solution in the lithium carbonate mother liquor tank by setting up a working chamber and an air conveying frame. When the temperature in the working chamber drops to a level unsuitable for heat recovery, the thermal switch is turned on, and the built-in fan is started to output air through the air conveying frame to the heat exchange square tube in the working chamber. The air is then output through the heat exchange square tube, carrying away the heat of the lithium carbonate solution in the working chamber, which causes the temperature of the lithium carbonate solution to drop rapidly, resulting in a higher cooling rate of the solution in the lithium carbonate mother liquor tank. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional view of the partially cut-open structure of a lithium carbonate heat recovery mother liquor tank with high efficiency cooling;

[0018] Figure 2 This is a three-dimensional view of the working compartment after it has been partially cut apart.

[0019] Figure 3 This is a three-dimensional view of the internal heat exchanger section after it has been cut open.

[0020] Figure 4 This is a three-dimensional structural view of the gas delivery frame;

[0021] Figure 5 This is a three-dimensional view of the assembly structure of a lithium carbonate heat recovery mother liquor tank with high efficiency cooling.

[0022] Figure label:

[0023] 1. Working chamber; 101. Heat exchange square tube; 102. Thermal switch one; 103. Thermal switch two; 104. Delivery pipe; 105. Electrically controlled valve one; 2. Internal heat exchange plate; 201. Input pipe; 202. Heat exchange coil; 203. Output pipe; 204. Electrically controlled valve two; 3. Gas delivery frame; 301. Built-in fan. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1

[0025] Please see Figure 1-5 This utility model relates to a high-efficiency cooling lithium carbonate heat recovery mother liquor tank, comprising a working chamber 1, an inner heat exchange plate 2, and a gas conveying frame 3. Several heat exchange square tubes 101 are fixedly installed through the upper part of the working chamber 1. The working chamber 1 is used to transport the purified solution after lithium carbonate treatment (the top of the working chamber 1 is sealed with a cover plate or other structure during operation; this is not shown in the attached drawings for ease of illustration). The solution initially introduced into the working chamber 1 has a high temperature; the heat exchange square tubes 101 further cool the solution after heat recovery. A gas conveying frame 3 is fixed to one end of the working chamber 1. 3 is set on the outside of the heat exchange square tube 101. When the air supply frame 3 is working, it delivers air to the heat exchange square tube 101 to further cool the lithium carbonate purification solution in the working chamber 1. An inner heat exchange plate 2 is fixed at the bottom of the working chamber 1. The heat exchange plate is used to recover the heat in the high-temperature solution after lithium carbonate purification in the working chamber 1. A heat exchange coil 202 is fixed inside the inner heat exchange plate 2. After recovering the heat in the lithium carbonate solution in the working chamber 1 through the heat exchange medium, the heat exchange coil 202 delivers the heat to other equipment that needs to use heat, thereby reducing energy waste.

[0026] Specifically, thermal switch 102 and thermal switch 203 are fixed on one side of the inner wall of the working chamber 1. The thermal switch 102 and thermal switch 203 are at the same height. When the working chamber 1 is working, thermal switch 102 controls the start and stop of the electric control valve 105 and the switch of the built-in fan 301.

[0027] Furthermore, the heat exchange square tubes 101 are arranged parallel to each other in the working chamber 1, and the spacing between adjacent heat exchange square tubes 101 is equal. Cooled air is transported in the heat exchange square tubes 101 to further cool the lithium carbonate solution in the working chamber 1.

[0028] Furthermore, a conveying pipe 104 is symmetrically and fixedly connected to the lower part of the end of the working chamber 1 away from the gas conveying frame 3. Each conveying pipe 104 is fixed with an electric control valve 105 on its periphery. The height of the conveying pipe 104 is higher than the height of the inner heat exchange plate 2. The ends of the two conveying pipes 104 away from the working chamber 1 are respectively connected to the equipment for inputting high-temperature lithium carbonate solution and the equipment for outputting lithium carbonate solution. The conveying on and off of the conveying pipe 104 is controlled by the electric control valve 105.

[0029] Furthermore, one end of the heat exchange coil 202 is fixedly connected to the input pipe 201, and the end of the heat exchange coil 202 away from the input pipe 201 is fixedly connected to the output pipe 203. Both the input pipe 201 and the output pipe 203 pass through the working chamber 1. The periphery of the input pipe 201 and the output pipe 203 on the outside of the working chamber 1 is fixed with an electric control valve 204. The inner heat exchange plate 2 is set below the heat exchange square tube 101. The end of the input pipe 201 away from the heat exchange coil 202 is connected to the equipment that inputs the heat exchange medium, and the end of the output pipe 203 away from the heat exchange coil 202 is connected to the equipment that needs to use the heat of the lithium carbonate solution for preheating to recover the heat of the lithium carbonate solution in the working chamber 1. The input pipe 201 and the output pipe 203 are both controlled by the electric control valve 204.

[0030] The operation process of this embodiment is as follows: During operation, the heat exchange medium is transported to the heat exchange coil 202 through the input pipe 201. When the heat exchange medium passes through the heat exchange coil 202, the heat in the lithium carbonate solution in the working chamber 1 is transferred to the heat exchange coil 202 through the inner heat exchange plate 2, and then transferred to the heat exchange fluid passing through it through the heat exchange coil 202. After heat exchange, it is transported to the output pipe 203 and output to the equipment that uses the heat through the output pipe 203, thus recovering the heat in the lithium carbonate solution in the working chamber 1. After recovering the heat, the working chamber... When the temperature of the lithium carbonate solution in chamber 1 drops to a level unsuitable for heat recovery (50°C), the thermal switch 102 opens, closing the electronically controlled valve 204 on the input pipe 201 and output pipe 203, and turning on the built-in fan 301. When the temperature in chamber 1 further drops to the preset temperature (20-30°C), the thermal switch 103 shuts off the operation of the built-in fan 301 and opens the electronically controlled valve 105 on the delivery pipe 104 at the end of chamber 1 that outputs the lithium carbonate solution, thus outputting the cooled lithium carbonate solution from chamber 1. Specific Implementation Example 2

[0031] Please see Figure 1 , 2 4, 5. Based on the specific embodiment one, a built-in fan 301 is fixed inside the gas delivery frame 3. Both ends of the gas delivery frame 3 are open and facing the heat exchange square tube 101. After the built-in fan 301 in the gas delivery frame 3 is opened, air is drawn in and output to the heat exchange square tube 101 to cool the lithium carbonate solution in the working chamber 1.

[0032] The operation process of this embodiment is as follows: During operation, when the temperature in the working chamber 1 drops to a level that is not suitable for heat recovery, the thermal switch 102 is turned on, and the built-in fan 301 is started to output air through the air delivery frame 3 to the heat exchange square tube 101 in the working chamber 1. The air is output through the heat exchange square tube 101, which carries away the heat of the lithium carbonate solution in the working chamber 1, so that the temperature of the lithium carbonate solution drops rapidly.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The preferred embodiments of this utility model disclosed 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 the specific implementations described. 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 high-efficiency cooled lithium carbonate heat recovery mother liquor tank, comprising a working chamber (1), an inner heat exchange plate (2), and a gas conveying frame (3), characterized in that: The upper part of the working chamber (1) is fixed with several heat exchange square tubes (101). One end of the working chamber (1) is fixed with a gas supply frame (3). The gas supply frame (3) is located on the outside of the heat exchange square tubes (101). The bottom of the working chamber (1) is fixed with an inner heat exchange plate (2). The inner heat exchange plate (2) is fixed with a heat exchange coil (202).

2. The high-efficiency cooling lithium carbonate heat recovery mother liquor tank according to claim 1, characterized in that: The thermal switch one (102) and thermal switch two (103) are fixed on one side of the inner wall of the working chamber (1), and the thermal switch one (102) and thermal switch two (103) are at the same height.

3. The high-efficiency cooling lithium carbonate heat recovery mother liquor tank according to claim 1, characterized in that: The heat exchange square tubes (101) are arranged parallel to each other in the working chamber (1), and the spacing between adjacent heat exchange square tubes (101) is equal.

4. The high-efficiency cooling lithium carbonate heat recovery mother liquor tank according to claim 1, characterized in that: The lower part of the working chamber (1) away from the gas delivery frame (3) is symmetrically connected to a delivery pipe (104). Each delivery pipe (104) is fixed with an electric control valve (105) on its periphery. The height of the delivery pipe (104) is higher than the height of the inner heat exchange plate (2).

5. The high-efficiency cooling lithium carbonate heat recovery mother liquor tank according to claim 1, characterized in that: One end of the heat exchange coil (202) is fixedly connected to the input pipe (201), and the other end of the heat exchange coil (202) away from the input pipe (201) is fixedly connected to the output pipe (203). The input pipe (201) and the output pipe (203) both pass through the working chamber (1). The periphery of the input pipe (201) and the output pipe (203) outside the working chamber (1) is fixed with an electric control valve (204). The inner heat exchange plate (2) is located below the heat exchange square tube (101).

6. The high-efficiency cooling lithium carbonate heat recovery mother liquor tank according to claim 1, characterized in that: The gas delivery frame (3) is fixed with a built-in fan (301). Both ends of the gas delivery frame (3) are open and face the heat exchange square tube (101).

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