Evaporation device for concentrating lithium carbonate solution

Abstract

The utility model discloses an evaporation device for lithium carbonate solution concentration, which comprises an evaporation box and a positioning support for positioning the evaporation box, a concentration box communicated with an inner cavity of the evaporation box is mounted on the lower side of the evaporation box, a feeding pipe communicated with the inner cavity of the evaporation box is mounted at the top of the evaporation box, and a driving component is arranged in the middle of the bottom side of the concentration box. A stirring assembly is mounted on a driving shaft of the driving assembly and is positioned in the evaporation box and the concentration box. According to the evaporation device for concentration of the lithium carbonate solution, the solution is evaporated and concentrated in the mode that high-temperature steam makes indirect contact with the lithium carbonate solution, the situation that steam is directly introduced into the lithium carbonate solution to affect preparation of lithium carbonate is avoided, meanwhile, the evaporation device has the high heat preservation effect, the energy utilization rate in the using process is guaranteed, and the energy consumption is reduced. In addition, when the evaporation device is used, precipitation and condensation of solids in the solution can be prevented, and discharging of the prepared lithium carbonate concentrated solution is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of lithium carbonate processing and preparation technology, specifically to an evaporation device for concentrating lithium carbonate solution. Background Technology

[0002] Lithium carbonate, a common lithium compound, is an inorganic salt typically composed of lithium, carbon, and oxygen. It is widely used in batteries, glass, ceramics, and pharmaceuticals. The lithium carbonate preparation process requires concentration of the prepared lithium carbonate solution to facilitate subsequent lithium carbonate precipitation. A common concentration method involves heating the lithium carbonate solution with steam to evaporate excess water. However, this method suffers from several drawbacks. Directly introducing steam into the lithium carbonate solution can alter some of its components, and the moisture in the steam can also negatively impact the solution, hindering lithium carbonate preparation. Furthermore, some heat is easily lost through the evaporator during concentration, leading to energy waste and further compromising the concentration process. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide an evaporation device for concentrating lithium carbonate solution. The device uses high-temperature steam to indirectly contact the lithium carbonate solution for evaporation and concentration, avoiding the impact of direct steam introduction into the lithium carbonate solution on the preparation of lithium carbonate. At the same time, the evaporation device has a high heat preservation effect, ensuring energy utilization during use. In addition, the evaporation device can prevent the precipitation and condensation of solids in the solution during use, facilitating the discharge of the prepared lithium carbonate concentrate. This can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an evaporation device for concentrating lithium carbonate solution, comprising an evaporation tank and a positioning bracket for positioning the evaporation tank, a concentration tank communicating with its inner cavity is installed on the lower side of the evaporation tank, a feed pipe communicating with its inner cavity is installed on the top of the evaporation tank, a drive assembly is provided in the middle of the bottom side of the concentration tank, and a stirring assembly is installed on the drive shaft of the drive assembly, the stirring assembly is located inside the evaporation tank and the concentration tank, several evaporation tubes penetrate through the side of the evaporation tank, and an insulation shell is fitted on the outside of the evaporation tank, a flow space is reserved between the insulation shell and the evaporation tank, several connecting pipes communicating with its inner cavity are installed on the side of the evaporation tank, and the connecting pipes are fixed to the side of the insulation shell and communicate with the flow space, a conduit communicating with the flow space is fixed at the lower part of the side of the insulation shell, and a feeding assembly communicating with its inner cavity is installed on the side of the concentration tank.

[0005] As a preferred embodiment of this utility model, the evaporation tube includes several heat exchange tubes fixed inside the evaporation box, and a guide tube communicating with the inner cavity of the heat exchange tube is fixed on the outside of the evaporation box, and an insulation sleeve is provided on the outside of the guide tube.

[0006] As a preferred embodiment of the present invention, the stirring assembly includes a mounting shaft rotatably mounted at the bottom of the inner cavity of the concentration tank, and a spiral blade is mounted on the side of the mounting shaft, with the spiral blade located inside the concentration tank.

[0007] As a preferred embodiment of this utility model, the mounting shaft extends upward into the evaporation chamber, and several stirring blades are fixed on the side of the mounting shaft, all of which are located inside the evaporation chamber. A fixing frame is installed inside the evaporation chamber, and the top end of the mounting shaft is rotatably connected to the side of the fixing frame. A conical block is fixed on the upper side of the fixing frame at the position corresponding to the feed pipe.

[0008] As a preferred embodiment of this utility model, the drive assembly includes a motor installed at the bottom of the concentration tank, and the output shaft of the motor is fixedly connected to the mounting shaft.

[0009] As a preferred embodiment of the present invention, the feeding assembly includes a drain pipe installed on the side of the concentration tank and communicating with its inner cavity, and a valve is installed on the drain pipe.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] The evaporation device for concentrating lithium carbonate solution according to this utility model uses indirect contact between high-temperature steam and lithium carbonate solution to evaporate and concentrate the solution, avoiding the impact of direct steam introduction into the lithium carbonate solution on the preparation of lithium carbonate. At the same time, this evaporation device has a high heat preservation effect, ensuring energy utilization during use. In addition, this evaporation device can prevent the precipitation and condensation of solids in the solution during use, which facilitates the discharge of the prepared lithium carbonate concentrate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 3 This is a schematic diagram of the stirring assembly in this utility model.

[0015] In the diagram: 1 Evaporation tank, 2 Concentration tank, 3 Positioning bracket, 4 Feed pipe, 5 Insulation shell, 6 Connecting pipe, 7 Guide pipe, 8 Heat exchange pipe, 9 Insulation jacket, 10 Drain pipe, 11 Valve, 12 Conduit, 13 Mounting shaft, 14 Fixing frame, 15 Stirring blade, 16 Spiral blade, 17 Motor, 18 Conical block. Detailed Implementation

[0016] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3 This utility model provides a technical solution: an evaporation device for concentrating lithium carbonate solution, including an evaporation box 1 and a positioning bracket 3 for positioning the evaporation box 1. A concentration box 2 communicating with its inner cavity is installed on the lower side of the evaporation box 1. A feed pipe 4 communicating with its inner cavity is installed on the top of the evaporation box 1. Lithium carbonate solution is added into the evaporation box 1 through the feed pipe 4. The lithium carbonate solution evaporates in the evaporation box 1. The concentrated lithium carbonate solution is collected in the concentration box 2.

[0018] A drive assembly is provided at the bottom center of the concentration tank 2, and a stirring assembly is mounted on the drive shaft of the drive assembly. The stirring assembly is located inside the evaporation tank 1 and the concentration tank 2. The stirring assembly includes a mounting shaft 13 rotatably mounted at the bottom of the inner cavity of the concentration tank 2. The mounting shaft 13 is preferably rotatably mounted to the concentration tank 2 through a bearing assembly. The mounting shaft 13 extends upward into the evaporation tank 1. Several stirring blades 15 are fixed on the side of the mounting shaft 13, and all stirring blades 15 are located inside the evaporation tank 1. The drive assembly includes a motor 17 mounted at the bottom of the concentration tank 2. The output shaft of the motor 17 is fixedly connected to the mounting shaft 13 through a coupling.

[0019] In use, the motor 17 is controlled to drive the mounting shaft 13 to rotate, which in turn causes the stirring blades 15 mounted on the mounting shaft 13 to rotate and stir the lithium carbonate solution in the evaporation tank 1, so that the lithium carbonate solution is heated evenly and the evaporation efficiency of the lithium carbonate solution is improved.

[0020] Several evaporation tubes are inserted through the side of the evaporator 1. The evaporation tubes include several heat exchange tubes 8 fixed inside the evaporator 1. A guide tube 7 connected to the inner cavity of the heat exchange tube 8 is fixed on the outside of the evaporator 1. An insulation sleeve 9 is fitted on the outside of the guide tube 7. It should be noted that guide tubes 7 are installed at both ends of the heat exchange tube 8. In use, external high-temperature gas is injected into the heat exchange tube 8 through the guide tube 7. The heat exchange tube 8 heats the lithium carbonate solution in the evaporator 1, which facilitates the evaporation of excess water in the lithium carbonate solution. The heat exchange tube 8 makes the high-temperature gas and the lithium carbonate solution in indirect contact, avoiding the high-temperature gas from affecting the preparation of lithium carbonate. After the high-temperature gas heats the lithium carbonate solution in the evaporator 1, it flows out through the guide tube 7 at the other end of the heat exchange tube 8. It should be noted that the high-temperature gas is continuously supplied into the heat exchange tube 8.

[0021] An insulation shell 5 is fitted on the outside of the evaporator 1. The insulation shell 5 is made of insulation material. A flow space is reserved between the insulation shell 5 and the evaporator 1. Several connecting pipes 6 are installed on the side of the evaporator 1 and communicate with its inner cavity. The connecting pipes 6 are fixed to the side of the insulation shell 5 and communicate with the flow space. The water vapor evaporated from the lithium carbonate solution by heating enters the flow space through the connecting pipes 6. When the water vapor flows in the flow space, it is used to keep the evaporator 1 warm and avoid heat loss in the evaporator 1, which would lead to energy waste.

[0022] A conduit 12, which communicates with the flow space, is fixed to the lower side of the heat-insulating shell 5. Water vapor in the solution condenses in the flow space and is discharged from the flow space through the conduit 12, which facilitates the use of this evaporation device.

[0023] A spiral blade 16 is mounted on the side of the mounting shaft 13, and the spiral blade 16 is located inside the concentration tank 2. The spiral blade 16 is used to stir the solution inside the concentration tank 2 to prevent the concentrated lithium carbonate solution from condensing and precipitating inside the concentration tank 2 and becoming difficult to discharge.

[0024] A mounting frame 14 is installed inside the evaporator 1. The top of the mounting shaft 13 is rotatably connected to the side of the mounting frame 14 through a bearing assembly. The mounting frame 14 positions the top of the mounting shaft 13 to ensure the stability of the stirring assembly during use. A conical block 18 is fixed on the upper side of the mounting frame 14 at the position corresponding to the feed pipe 4. The conical block 18 is used to divert the solution entering the evaporator 1 through the feed pipe 4, so that the newly added lithium carbonate solution flows to various places, preventing it from flowing to the same position and causing the lithium carbonate solution at that position to cool down rapidly. At the same time, the conical block 18 prevents some material from accumulating above the mounting frame 14.

[0025] The side of the concentration tank 2 is equipped with a feeding assembly that communicates with its inner cavity. The feeding assembly includes a drain pipe 10 installed on the side of the concentration tank 2 and communicating with its inner cavity. A valve 11 is installed on the drain pipe 10. After the lithium carbonate concentrate is prepared, the lithium carbonate concentrate can be discharged through the drain pipe 10 by opening the valve 11.

[0026] The motor 17 used in this utility model is a common electronic component in the prior art. Its working method and circuit structure are well known technologies. The motor 17 is controlled by an externally set switch or PLC controller. This method is a common technical means used by technicians and will not be described in detail here.

[0027] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An evaporation apparatus for concentrating lithium carbonate solution, comprising an evaporation chamber (1) and a positioning bracket (3) for positioning the evaporation chamber (1), characterized in that: The evaporator (1) is equipped with a concentration tank (2) connected to its inner cavity on the lower side. The evaporator (1) is equipped with a feed pipe (4) connected to its inner cavity on the top. The concentration tank (2) is equipped with a drive assembly in the middle of the bottom side. The drive shaft of the drive assembly is equipped with a stirring assembly. The stirring assembly is located inside the evaporator (1) and the concentration tank (2). Several evaporation pipes pass through the side of the evaporator (1). The evaporator (1) is equipped with a heat insulation shell (5) on the outside. A flow space is reserved between the heat insulation shell (5) and the evaporator (1). Several connecting pipes (6) connected to its inner cavity are installed on the side of the evaporator (1). The connecting pipes (6) are fixed on the side of the heat insulation shell (5) and connected to the flow space. A conduit (12) connected to the flow space is fixed on the lower part of the side of the heat insulation shell (5). The concentration tank (2) is equipped with a feeding assembly connected to its inner cavity on the side.

2. The evaporation apparatus for concentrating lithium carbonate solution according to claim 1, characterized in that: The evaporation tube includes several heat exchange tubes (8) fixed inside the evaporation box (1), and a guide tube (7) connected to the inner cavity of the heat exchange tube (8) is fixed on the outside of the evaporation box (1), and an insulation sleeve (9) is provided on the outside of the guide tube (7).

3. The evaporation apparatus for concentrating lithium carbonate solution according to claim 1, characterized in that: The stirring assembly includes a mounting shaft (13) rotatably mounted at the bottom of the inner cavity of the concentration tank (2), and a spiral blade (16) is mounted on the side of the mounting shaft (13), and the spiral blade (16) is located inside the concentration tank (2).

4. The evaporation apparatus for concentrating lithium carbonate solution according to claim 3, characterized in that: The mounting shaft (13) extends upward into the evaporator (1). Several stirring blades (15) are fixed on the side of the mounting shaft (13), and the stirring blades (15) are all located inside the evaporator (1). A fixing frame (14) is installed inside the evaporator (1). The top of the mounting shaft (13) is rotatably connected to the side of the fixing frame (14). A conical block (18) is fixed on the upper side of the fixing frame (14) at the position corresponding to the feed pipe (4).

5. The evaporation apparatus for concentrating lithium carbonate solution according to claim 3, characterized in that: The drive assembly includes a motor (17) installed at the bottom of the concentration tank (2), and the output shaft of the motor (17) is fixedly connected to the mounting shaft (13).

6. The evaporation apparatus for concentrating lithium carbonate solution according to claim 1, characterized in that: The feeding assembly includes a drain pipe (10) installed on the side of the concentration tank (2) and communicating with its inner cavity, and a valve (11) is installed on the drain pipe (10).

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