Batching device and lithium carbonate production system

Abstract

The utility model provides a batching device and a lithium carbonate production system. The batching device comprises a batching box; the first stirring assembly comprises a first rotating shaft and at least two first stirring units, and each first stirring unit comprises at least two first stirring blades which are arranged in the circumferential direction of the first rotating shaft at intervals; the first stirring assembly and the second stirring assembly are arranged at intervals in the radial direction of the first rotating shaft, the second stirring assembly comprises a second rotating shaft and at least two second stirring units, and each second stirring unit comprises at least two second stirring blades which are arranged at intervals in the circumferential direction of the second rotating shaft; and the conveying direction of the first stirring blade is opposite to that of the second stirring blade. According to the technical scheme, the problems that when an alkali preparation device in the prior art is used for preparation, a sodium carbonate deposition layer is easily formed at the bottom of the preparation tank, so that the concentration of a solution fluctuates greatly, and the quality and the performance of a product are influenced can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium carbonate production, and in particular, to a batching device and a lithium carbonate production system. Background Art

[0002] In a lithium carbonate production system, the preparation and use of soda ash (sodium carbonate) are key links in the entire production process. As the core raw material in the lithium precipitation unit, the chemical reaction between soda ash and qualified lithium mother liquor is the basis for generating lithium carbonate precipitation. During the lithium precipitation process, the precise ratio of the lithium mother liquor to the soda ash solution is crucial. If the concentration of the soda ash solution exceeds the process control index, it will not only consume a large amount of soda ash but also have a negative impact on the quality and performance of the final product. The traditional method of preparing alkali is to directly add solid sodium carbonate powder into the preparation tank, promote dissolution by introducing compressed air and low-pressure steam, use a stirrer to ensure uniform mixing, and finally pump the solution to the storage tank. However, when configuring with the existing alkali preparation device, it is easy to form a soda ash deposition layer at the bottom of the preparation tank, resulting in a large fluctuation in the solution concentration and affecting the quality and performance of the product. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a batching device and a lithium carbonate production system, which can solve the problem that when configuring with the existing alkali preparation device, it is easy to form a soda ash deposition layer at the bottom of the preparation tank, resulting in a large fluctuation in the solution concentration and affecting the quality and performance of the product.

[0004] To achieve the above object, according to one aspect of the utility model, there is provided a batching device, including: a batching box, including a receiving cavity and a feeding port communicating with the receiving cavity; a first stirring assembly, the first stirring assembly including a first rotating shaft and at least two first stirring units, at least a part of the first rotating shaft being located in the receiving cavity, at least two first stirring units being arranged at intervals along the axial direction of the first rotating shaft and all being located in the receiving cavity, the first stirring unit including at least two first stirring blades arranged at intervals along the circumferential direction of the first rotating shaft; and a second stirring assembly, the first stirring assembly and the second stirring assembly being arranged at intervals along the radial direction of the first rotating shaft, the second stirring assembly including a second rotating shaft and at least two second stirring units, at least a part of the second rotating shaft being located in the receiving cavity, at least two second stirring units being arranged at intervals along the axial direction of the second rotating shaft and all being located in the receiving cavity, the second stirring unit including at least two second stirring blades arranged at intervals along the circumferential direction of the second rotating shaft, the conveying direction of the first stirring blades being opposite to the conveying direction of the second stirring blades.

[0005] Further, the batching device further includes an isolation structure, which is installed in the accommodation cavity and divides the accommodation cavity into an independent first sub-accommodation cavity and a second sub-accommodation cavity. At least one first stirring assembly is arranged in the first sub-accommodation cavity, and at least one second stirring assembly is arranged in the second sub-accommodation cavity. The isolation structure includes a first flow-through structure and a second flow-through structure, and both the first flow-through structure and the second flow-through structure can communicate the first sub-accommodation cavity and the second sub-accommodation cavity.

[0006] Further, both the first flow-through structure and the second flow-through structure are through holes penetrating the isolation structure. One of the first flow-through structure and the second flow-through structure is arranged near the top of the batching tank, and the other of the first flow-through structure and the second flow-through structure is arranged near the bottom of the batching tank.

[0007] Further, the isolation structure further includes a sandwich layer, a first liquid inlet, a first liquid outlet, a second liquid inlet, and a second liquid outlet. An independent first flow-through channel and a second flow-through channel are arranged in the sandwich layer. The first liquid inlet, the first liquid outlet, and the first flow-through channel form the first flow-through structure, and the second liquid inlet, the second liquid outlet, and the second flow-through channel form the second flow-through structure. Among them, the first flow-through channel communicates with the first sub-accommodation cavity through the first liquid inlet, the first flow-through channel communicates with the second sub-accommodation cavity through the first liquid outlet, the second flow-through channel communicates with the second sub-accommodation cavity through the second liquid inlet, and the second flow-through channel communicates with the first sub-accommodation cavity through the second liquid outlet. The first liquid inlet and the second liquid outlet are arranged near the top of the batching tank, the first liquid outlet and the second liquid inlet are arranged near the bottom of the batching tank, the first liquid inlet is arranged corresponding to the liquid outlet end of the first stirring assembly, and the second liquid inlet is arranged corresponding to the liquid outlet end of the second stirring assembly.

[0008] Further, the first liquid inlet, the second liquid outlet, the first liquid outlet, and the second liquid inlet are arranged at intervals in sequence from top to bottom; and / or, the first stirring assembly and the second stirring assembly are arranged in a staggered manner.

[0009] Further, the batching device further includes a first exhaust pipe and a purification tank, and a purification solution is contained in the purification tank. One end of the first exhaust pipe is communicated with the accommodation cavity, and the other end of the first exhaust pipe extends into the purification solution in the purification tank.

[0010] Further, the batching device further includes an infusion pipe and a heat exchanger. The liquid inlet end of the infusion pipe is configured to be connected to a liquid supply device. The first exhaust pipe is communicated with the purification tank through the heat exchanger, and the infusion pipe is heat-exchange connected to the heat exchanger.

[0011] Further, the batching device further includes a branch pipeline. The first end of the branch pipeline is communicated with the purification tank, the second end of the branch pipeline is selectively communicated with the infusion pipe, and the heat exchanger is located between the connection point A of the second end of the branch pipeline and the infusion pipe and the liquid inlet end of the infusion pipe.

[0012] Furthermore, the batching device further includes a grid plate, which is arranged in the purification tank, and at least part of the grid plate is immersed in the purification solution.

[0013] According to another aspect of the present invention, a lithium carbonate production system is provided, including: a reaction kettle; the above-mentioned batching device, and the discharge port of the batching tank is communicated with the reaction kettle.

[0014] By applying the technical solution of the present invention, a batching tank, a first stirring assembly and a second stirring assembly are provided. Since the conveying direction of the first stirring blades is opposite to that of the second stirring blades, the conveying directions of the first stirring assembly and the second stirring assembly are opposite. Through the above settings, on the one hand, the solid soda powder and pure water added into the accommodating cavity can be evenly mixed. At the same time, the pure water in the accommodating cavity can form a convection under the common stirring of the first stirring unit and the second stirring unit, which helps to break up the lumps during the stirring process, avoid the formation of a soda deposition layer at the bottom of the accommodating cavity, ensure the uniformity of the concentration of the prepared soda solution, and further ensure the quality and performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the attached

[0016] In the drawings:

[0017] Figure 1 shows a schematic structural diagram of the batching device according to an embodiment of the present invention;

[0018] Figure 2 shows a partial structural diagram of the batching device according to an embodiment of the present invention.

[0019] Among them, the above-mentioned drawings include the following reference numerals:

[0020] 10. ingredient box; 11. containing chamber; 111. first sub-containing chamber; 112. second sub-containing chamber; 12. feeding port; 20. first stirring assembly; 21. first drive motor; 22. first rotating shaft; 23. first stirring unit; 231. first stirring blade; 30. second stirring assembly; 31. second drive motor; 32. second rotating shaft; 33. second stirring unit; 331. second stirring blade; 40. isolation structure; 41. first liquid inlet; 42. first liquid outlet; 43. second liquid inlet; 44. second liquid outlet; 50. The first exhaust pipe; 60, purification tank; 70, infusion pipe; 71, flow meter; 80, heat exchanger; 90, branch pipeline; 91, second exhaust pipe; 93, first switch valve; 94, second switch valve; 95, third switch valve; 96, feed pipe; 97, fourth switch valve; 100, grid plate; 200, reflux pipe; 300, gas delivery pipe; 400, pressurizing device; 500, steam jacket; 501, steam inlet; 502, steam outlet; 600, density meter; 700, discharge pipe; 701, delivery pump; 800, third exhaust pipe. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] See also Figure 1 and Figure 2 As shown, the utility model provides a batching device, which includes: a batching box 10, including a containing chamber 11 and a feeding port 12 connected to the containing chamber 11; a first stirring assembly 20, the first stirring assembly 20 includes a first rotating shaft 22 and at least two first stirring units 23, at least part of the first rotating shaft 22 is located in the containing chamber 11, at least two first stirring units 23 are arranged at intervals along the axial direction of the first rotating shaft 22 and are all located in the containing chamber 11, the first stirring unit 23 includes at least two first stirring blades 231 arranged at intervals along the circumferential direction of the first rotating shaft 22; and a second stirring The mixing assembly 30, the first mixing assembly 20 and the second mixing assembly 30 are arranged at intervals along the radial direction of the first rotating shaft, the second mixing assembly 30 includes a second rotating shaft 32 and at least two second mixing units 33, at least a portion of the second rotating shaft 32 is located in the accommodating cavity 11, at least two second mixing units 33 are arranged at intervals along the axial direction of the second rotating shaft 32 and are all located in the accommodating cavity 11, the second mixing unit 33 includes at least two second mixing blades 331 arranged at intervals along the circumferential direction of the second rotating shaft 32, and the conveying direction of the first mixing blade 231 is opposite to the conveying direction of the second mixing blade 331.

[0023] In this embodiment, solid soda ash powder is added into the accommodation chamber 11 through the feeding port 12, and pure water can also be added into the accommodation chamber 11 through the feeding port 12. Both the first stirring blade 231 and the second stirring blade 331 are axial flow stirring blades, that is, both the first stirring blade 231 and the second stirring blade 331 can drive the material to move along its axial direction. The conveying direction of the first stirring blade 231 is opposite to that of the second stirring blade 331. That is, the first stirring blade 231 conveys the material from the bottom of the accommodation chamber 11 to the top along its axial direction, then the second stirring blade 331 can convey the material from the top of the accommodation chamber 11 to the bottom along its axial direction. If the first stirring blade 231 conveys the material from the top of the accommodation chamber 11 to the bottom along its axial direction, then the second stirring blade 331 can convey the material from the bottom of the accommodation chamber 11 to the top along its axial direction.

[0024] In the above stirring method, on the one hand, it can make the solid soda ash powder and pure water added into the accommodation chamber 11 be evenly mixed. At the same time, the pure water in the accommodation chamber 11 can form a convection under the common stirring of the first stirring unit 23 and the second stirring unit 33, which helps to break up the lumps during the stirring process, avoid the formation of a soda ash deposition layer at the bottom of the accommodation chamber 11, ensure the balance of the concentration of the prepared soda ash solution, and further ensure the quality and performance of the product.

[0025] As Figure 1 shown, in an embodiment of the present utility model, the first stirring assembly 20 further includes a first driving motor 21, and the second stirring assembly 30 further includes a second driving motor 31. The first driving motor 21 is drivingly connected to the first rotating shaft 22 to drive the first rotating shaft 22 to rotate, and the second driving motor 31 is drivingly connected to the second rotating shaft 32 to drive the second rotating shaft 32 to rotate.

[0026] Combined with reference to Figure 1 and Figure 2 shown, in an embodiment of the present utility model, the batching device further includes an isolation structure 40. The isolation structure 40 is installed in the accommodation chamber 11 and divides the accommodation chamber 11 into independent first sub-accommodation chamber 111 and second sub-accommodation chamber 112. At least one first stirring assembly 20 is arranged in the first sub-accommodation chamber 111, and at least one second stirring assembly 30 is arranged in the second sub-accommodation chamber 112. The isolation structure 40 includes a first flow-through structure and a second flow-through structure, and both the first flow-through structure and the second flow-through structure can communicate the first sub-accommodation chamber 111 and the second sub-accommodation chamber 112.

[0027] In this embodiment, the soda ash and pure water in the first sub-accommodating cavity 111 enter the second sub-accommodating cavity 112 through the first overcurrent structure after being stirred by the first stirring unit 23, and the soda ash and pure water in the second sub-accommodating cavity 112 enter the first sub-accommodating cavity 111 through the second overcurrent structure after being stirred by the second stirring unit 33. The arrangement of the isolation structure 40 can not only reduce the interference between the solutions flowing in different directions, but also ensure that the solution stirred by the first stirring unit 23 can be secondarily stirred by the second stirring unit 33, and the solution stirred by the second stirring unit 33 can be secondarily stirred by the first stirring unit 23, which can not only ensure the mixing uniformity of the soda ash and pure water, but also avoid the precipitation of soda ash during the stirring process.

[0028] Referring to Figure 1 and Figure 2 As shown, in an embodiment of the present utility model, both the first overcurrent structure and the second overcurrent structure are through holes penetrating the isolation structure 40. One of the first overcurrent structure and the second overcurrent structure is arranged near the top of the batching tank 10, and the other of the first overcurrent structure and the second overcurrent structure is arranged near the bottom of the batching tank 10.

[0029] In one embodiment, the isolation structure 40 is a partition board, and the first overcurrent structure and the second overcurrent structure can be two through holes opened on the partition board.

[0030] Referring to Figure 1 and Figure 2 As shown, in an embodiment of the present utility model, the isolation structure 40 further includes a sandwich layer, a first liquid inlet 41, a first liquid outlet 42, a second liquid inlet 43, and a second liquid outlet 44. An independent first overcurrent channel and a second overcurrent channel are arranged in the sandwich layer. The first liquid inlet 41, the first liquid outlet 42, and the first overcurrent channel form the first overcurrent structure, and the second liquid inlet 43, the second liquid outlet 44, and the second overcurrent channel form the second overcurrent structure. Among them, the first overcurrent channel is communicated with the first sub-accommodating cavity 111 through the first liquid inlet 41, the first overcurrent channel is communicated with the second sub-accommodating cavity 112 through the first liquid outlet 42, the second overcurrent channel is communicated with the second sub-accommodating cavity 112 through the second liquid inlet 43, the second overcurrent channel is communicated with the first sub-accommodating cavity 111 through the second liquid outlet 44. The first liquid inlet 41 and the second liquid outlet 44 are arranged near the top of the batching tank 10, the first liquid outlet 42 and the second liquid inlet 43 are arranged near the bottom of the batching tank 10, the first liquid inlet 41 is arranged corresponding to the liquid outlet end of the first stirring assembly 20, and the second liquid inlet 43 is arranged corresponding to the liquid outlet end of the second stirring assembly 30.

[0031] In this embodiment, it is assumed that the conveying direction of the first stirring blade 231 is from bottom to top, and the conveying direction of the second stirring blade 331 is from top to bottom. The soda ash and pure water in the first sub-accommodating cavity 111 are mixed under the stirring action of the first stirring blade 231, and are conveyed from the bottom of the first sub-accommodating cavity 111 to the top of the first sub-accommodating cavity 111 by the first stirring blade 231, and then enter the first flow-through channel through the first liquid inlet 41, and then enter the second sub-accommodating cavity 112 from the bottom of the second sub-accommodating cavity 112 through the first liquid outlet 42, and then are stirred by the second stirring blade 331; the soda ash and pure water in the second sub-accommodating cavity 112 are mixed under the stirring action of the second stirring blade 331, and are conveyed from the top of the second sub-accommodating cavity 112 to the bottom of the second sub-accommodating cavity 112 by the second stirring blade 331, and then enter the second flow-through channel through the second liquid inlet 43, and then enter the first sub-accommodating cavity 111 from the top of the first sub-accommodating cavity 111 through the second liquid outlet 44, and then are stirred by the first stirring blade 231, and so on in a cycle to ensure the full mixing of soda ash and pure water.

[0032] Referring to Figure 1 and Figure 2 As shown, in an embodiment of the present utility model, the first liquid inlet 41, the second liquid outlet 44, the first liquid outlet 42 and the second liquid inlet 43 are arranged at intervals in sequence from top to bottom.

[0033] In this embodiment, the first liquid inlet 41 is arranged above the second liquid outlet 44 to ensure that the solution flowing into the first sub-accommodating cavity 111 through the second liquid outlet 44 can be stirred by the first stirring blade 231 and then enter the first flow-through channel through the first liquid inlet 41. The first liquid outlet 42 is located above the second liquid inlet 43. Similarly, to ensure that the solution flowing into the second sub-accommodating cavity 112 through the first liquid outlet 42 can be stirred by the second stirring blade 331 and then enter the second flow-through channel through the second liquid inlet 43, thereby realizing the full mixing of soda ash and pure water and avoiding the precipitation of soda ash during the stirring process.

[0034] In an embodiment of the present utility model, baffles are provided at both the first liquid outlet 42 and the second liquid outlet 44. The baffle at the first liquid outlet 42 can prevent the solution in the second sub-accommodating cavity 112 from flowing into the first flow-through channel through the first liquid outlet 42, and the baffle at the second liquid outlet 44 can prevent the solution in the first sub-accommodating cavity 111 from flowing into the second flow-through channel through the second liquid outlet 44.

[0035] In an embodiment of the present utility model, the first stirring assembly 20 and the second stirring assembly 30 are arranged in a staggered manner.

[0036] In this embodiment, the first stirring assembly 20 and the second stirring assembly 30 are arranged in a staggered manner. On the one hand, it can increase the complexity of the path of the materials (soda ash and pure water) during the stirring process, improve the mixing uniformity of the materials. At the same time, during the stirring process, the materials may form dead zones in some areas of the first stirring assembly and the second stirring assembly. The staggered arrangement helps to reduce the stirring dead zones and ensure that the materials can be fully stirred throughout the accommodation cavity 11. On the other hand, the staggered arrangement can guide the materials to form a more complex flow pattern, which is helpful for the dispersion and mixing of the materials.

[0037] Referring to Figure 1 and Figure 2 As shown, in an embodiment of the present utility model, the batching device further includes a first exhaust pipe 50 and a purification tank 60. A purification solution is contained in the purification tank 60. One end of the first exhaust pipe 50 is communicated with the accommodation cavity 11, and the other end of the first exhaust pipe 50 extends into the purification solution in the purification tank 60.

[0038] In this embodiment, during the process of preparing the soda ash solution, the generated alkali mist is discharged through the first exhaust pipe 50 into the purification solution in the purification tank 60, and the purification solution can purify the alkali mist.

[0039] In one embodiment, the purification solution is water.

[0040] Referring to Figure 1 and Figure 2 As shown, in an embodiment of the present utility model, the isolation structure 40 is a plate structure. The batching device further includes a third exhaust pipe 800, and the third exhaust pipe 800 is communicated with the first exhaust pipe 50. The third exhaust pipe 800 is arranged above the isolation structure 40, and a plurality of exhaust holes communicated with the accommodation cavity 11 are arranged on the third exhaust pipe 800. The alkali mist generated in the accommodation cavity 11 can enter the first exhaust pipe 50 through the third exhaust pipe 800, and then be discharged from the first exhaust pipe 50 into the purification solution in the purification tank 60.

[0041] As Figure 1 shown, in an embodiment of the present utility model, the batching device further includes a return pipe 200. A first switch valve 93 is arranged on the return pipe 200. One end of the return pipe 200 is communicated with the purification tank 60, and the other end of the return pipe 200 is selectively communicated with the accommodation cavity 11 through the first switch valve 93. The sodium carbonate-containing solution purified by the purification solution flows back into the accommodation cavity 11 through the return pipe 200. In the prior art, during the process of preparing the soda ash solution, the purification treatment and recycling of sodium carbonate dust, water mist, and alkali mist are not considered, while the batching device of the present application can realize the purification treatment and recycling of sodium carbonate dust, water mist, and alkali mist.

[0042] Referring to Figure 1 and Figure 2As shown, in one embodiment of the utility model, the batching device also includes an infusion tube 70 and a heat exchanger 80, the liquid inlet end of the infusion tube 70 is constructed to be connected to the liquid supply device, the first exhaust pipe 50 is connected to the purification tank 60 through the heat exchanger 80, and the infusion tube 70 is connected to the heat exchanger 80 for heat exchange.

[0043] In this embodiment, the infusion tube 70 is used to transport pure water into the accommodating chamber 11. During the preparation of the soda ash solution, the high-temperature water vapor and alkaline mist generated enter the purification tank 60 through the first exhaust pipe 50, and the heat of the water vapor and alkaline mist is transferred to the infusion tube 70 through the heat exchanger 80, thereby heating the pure water in the infusion tube 70.

[0044] like Figure 1 As shown, in one embodiment of the present invention, a flow meter 71 is provided on the infusion tube 70 .

[0045] like Figure 1 As shown, in one embodiment of the utility model, the batching device also includes a branch pipeline 90, the first end of the branch pipeline 90 is connected to the purification tank 60, the second end of the branch pipeline 90 is selectively connected to the infusion tube 70, and the heat exchanger 80 is located between the connection point A between the second end of the branch pipeline 90 and the infusion tube 70 and the liquid inlet end of the infusion tube 70.

[0046] In this embodiment, the purified solution is pure water, and a second switch valve 94 is provided on the branch pipeline 90. The second switch valve 94 is a three-way valve, and the second end of the branch pipeline 90 is selectively connected to the infusion pipe 70 through the three-way valve. The heat of water vapor and alkaline mist is transferred to the infusion pipe 70 through the heat exchanger 80 to heat the pure water in the infusion pipe 70. The heated pure water can be added to the purification tank 60 through the branch pipeline 90 to achieve the replenishment of the purified solution.

[0047] like Figure 1 As shown, in one embodiment, a third switch valve 95 is provided on the first exhaust pipe 50 to control the opening and closing of the first exhaust pipe 50 and the accommodating chamber 11 .

[0048] See also Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the dosing device further comprises a grid plate 100, which is disposed in the purification tank 60, and at least a portion of the grid plate 100 is immersed in the purification solution.

[0049] In this embodiment, a grid plate 100 is additionally provided in the purification tank 60 , and the gas (alkaline mist) fully contacts with the purification solution through the grid plate 100 , thereby improving the purification efficiency.

[0050] like Figure 1As shown, in one embodiment of the present invention, the batching device further includes a gas delivery pipe 300 and a pressurizing device 400 , one end of the gas delivery pipe 300 is connected to the first exhaust pipe 50 , and the pressurizing device 400 is installed on the first exhaust pipe 50 .

[0051] In this embodiment, a fourth switch valve 97 is provided on the gas delivery pipe 300, and the other end of the gas delivery pipe 300 is selectively connected to the device for supplying compressed air through the fourth switch valve 97. The gas delivery pipe 300 is used to deliver compressed air to the first exhaust pipe 50, and the pressurizing device 400 can accelerate the rapid suction of the alkali mist and water vapor in the accommodating chamber 11, thereby reducing the enrichment of water vapor in the accommodating chamber 11.

[0052] like Figure 1 As shown, in one embodiment of the utility model, the batching device further includes a second exhaust pipe 91, one end of the second exhaust pipe 91 is connected to the purification tank 60, and the other end of the second exhaust pipe 91 is connected to the tail gas absorption tower. When the purification solution is in a saturated state and cannot continue to purify the alkali mist, the alkali mist can be discharged into the tail gas absorption tower through the second exhaust pipe 91 for purification operation. The structure of the tail gas absorption tower can adopt the existing technology and will not be repeated here.

[0053] like Figure 1 As shown, in one embodiment of the present invention, the batching device further includes a feed pipe 96 , which can be connected to a device for conveying solid soda ash (such as a screw conveyor) to add soda ash into the accommodating chamber 11 .

[0054] In the prior art, the temperature of the sodium carbonate solution changes greatly during the preparation process. The temperature drop is likely to cause sodium carbonate microcrystals. During the reaction of qualified lithium mother liquor with the sodium carbonate solution, sodium chloride microcrystals and sodium carbonate microcrystals are wrapped in the lithium carbonate crystal nuclei. The resulting peritectic phenomenon is likely to cause the purity of lithium carbonate to decrease, and the sodium and chlorine content in the lithium carbonate product to gradually increase.

[0055] In order to solve the above problems, Figure 1 As shown, in one embodiment of the utility model, the batching device further includes a steam jacket 500, which is sleeved on the outer periphery of the batching box 10, and is provided with a steam inlet 501 and a steam outlet 502. Steam enters the steam jacket 500 through the steam inlet 501 to heat the solution in the containing chamber 11 to reach the preparation temperature. Through the above arrangement, the temperature change during the preparation of the sodium carbonate solution can be reduced.

[0056] like Figure 1As shown, in one embodiment of the utility model, a densitometer 600 is provided at the bottom of the batching box 10 for measuring the density of the solution in the accommodating chamber 11. The batching device also includes a discharge pipe 700, which is connected to the discharge end of the batching box 10, and a delivery pump 701 is provided on the discharge pipe 700 to deliver the prepared soda ash solution to the next process through the discharge pipe 700.

[0057] In one embodiment, a filtering device is provided on the discharge pipe 700, and the soda ash solution can be filtered before being transported to the next process. The filtering device can adopt the filtering device of the prior art, and the specific structure is not repeated here.

[0058] According to another aspect of the present invention, a lithium carbonate production system is provided, comprising: a reactor; the above-mentioned batching device, wherein the discharge port of the batching box 10 is connected to the reactor.

[0059] In this embodiment, the batching device of the lithium carbonate production system has all the technical solutions and all the technical effects of the above-mentioned batching device, which will not be repeated here.

[0060] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: a batching box, a first stirring component and a second stirring component are provided. Since the conveying direction of the first stirring blade is opposite to the conveying direction of the second stirring blade, the conveying directions of the first stirring component and the second stirring component are opposite. Through the above-mentioned arrangement, on the one hand, the soda ash solid powder and pure water added to the accommodating chamber can be evenly mixed. At the same time, the pure water in the accommodating chamber can form convection under the joint stirring of the first stirring unit and the second stirring unit, which helps to break up the lumps in the stirring process and avoid the formation of a soda ash deposition layer at the bottom of the accommodating chamber, thereby ensuring the balance of the concentration of the soda ash solution after configuration, and thus ensuring the quality and performance of the product.

[0061] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments 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.

[0062] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0063] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A batching device, characterized in that: include: A batching box (10) comprising a containing chamber (11) and a feeding port (12) communicating with the containing chamber (11); a first stirring assembly (20), the first stirring assembly (20) comprising a first rotating shaft (22) and at least two first stirring units (23), at least a portion of the first rotating shaft (22) being located in the accommodating chamber (11), at least two first stirring units (23) being arranged at intervals along the axial direction of the first rotating shaft (22) and all being located in the accommodating chamber (11), the first stirring unit (23) comprising at least two first stirring blades (231) being arranged at intervals along the circumferential direction of the first rotating shaft (22); and A second stirring component (30), wherein the first stirring component (20) and the second stirring component (30) are arranged at intervals along the radial direction of the first rotating shaft (22); the second stirring component (30) comprises a second rotating shaft (32) and at least two second stirring units (33); at least a portion of the second rotating shaft (32) is located in the accommodating cavity (11); at least two second stirring units (33) are arranged at intervals along the axial direction of the second rotating shaft (32) and are all located in the accommodating cavity (11); the second stirring unit (33) comprises at least two second stirring blades (331) arranged at intervals along the circumference of the second rotating shaft (32); the conveying direction of the first stirring blade (231) is opposite to the conveying direction of the second stirring blade (331).

2. The batching device according to claim 1, characterized in that: The batching device further comprises an isolation structure (40), wherein the isolation structure (40) is installed in the accommodating chamber (11) and divides the accommodating chamber (11) into a first sub-accommodating chamber (111) and a second sub-accommodating chamber (112) which are independent of each other, wherein at least one of the first stirring components (20) is arranged in the first sub-accommodating chamber (111), and at least one of the second stirring components (30) is arranged in the second sub-accommodating chamber (112), and the isolation structure (40) comprises a first flow-through structure and a second flow-through structure, wherein both the first flow-through structure and the second flow-through structure are capable of connecting the first sub-accommodating chamber (111) and the second sub-accommodating chamber (112).

3. The batching device according to claim 2, characterized in that: The first flow-through structure and the second flow-through structure are both through holes that penetrate the isolation structure (40); one of the first flow-through structure and the second flow-through structure is arranged near the top of the batching box (10), and the other of the first flow-through structure and the second flow-through structure is arranged near the bottom of the batching box (10).

4. The batching device according to claim 2, characterized in that: The isolation structure (40) further comprises an interlayer, a first liquid inlet (41), a first liquid outlet (42), a second liquid inlet (43) and a second liquid outlet (44); a first flow passage and a second flow passage which are independent of each other are arranged in the interlayer; the first liquid inlet (41), the first liquid outlet (42) and the first flow passage form the first flow structure; the second liquid inlet (43), the second liquid outlet (44) and the second flow passage form the second flow structure; wherein the first flow passage is in communication with the first sub-accommodating chamber (111) via the first liquid inlet (41); and the first flow passage is in communication with the first sub-accommodating chamber (111) via the first liquid outlet (42). The second sub-accommodating chamber (112) is connected to the second sub-accommodating chamber (112), the second flow passage is connected to the second sub-accommodating chamber (112) through the second liquid inlet (43), the second flow passage is connected to the first sub-accommodating chamber (111) through the second liquid outlet (44), the first liquid inlet (41) and the second liquid outlet (44) are arranged near the top of the batching box (10), the first liquid outlet (42) and the second liquid inlet (43) are arranged near the bottom of the batching box (10), the first liquid inlet (41) is arranged corresponding to the liquid outlet end of the first stirring component (20), and the second liquid inlet (43) is arranged corresponding to the liquid outlet end of the second stirring component (30).

5. The batching device according to claim 4, characterized in that: The first liquid inlet (41), the second liquid outlet (44), the first liquid outlet (42) and the second liquid inlet (43) are arranged in sequence from top to bottom at intervals; and / or the first stirring component (20) and the second stirring component (30) are staggered.

6. The batching device according to any one of claims 1 to 5, characterized in that: The batching device further comprises a first exhaust pipe (50) and a purification tank (60), wherein the purification tank (60) is filled with a purification solution, one end of the first exhaust pipe (50) is connected to the accommodating chamber (11), and the other end of the first exhaust pipe (50) extends into the purification solution in the purification tank (60).

7. The batching device according to claim 6, characterized in that: The batching device further comprises a liquid infusion pipe (70) and a heat exchanger (80); the liquid inlet end of the liquid infusion pipe (70) is configured to be connected to a liquid supply device; the first exhaust pipe (50) is connected to the purification tank (60) via the heat exchanger (80); and the liquid infusion pipe (70) is connected to the heat exchanger (80) for heat exchange.

8. The batching device according to claim 7, characterized in that: The batching device further comprises a branch pipeline (90), a first end of the branch pipeline (90) being connected to the purification tank (60), a second end of the branch pipeline (90) being selectively connected to the infusion pipe (70), and the heat exchanger (80) being located between a connection point A between the second end of the branch pipeline (90) and the infusion pipe (70) and a liquid inlet end of the infusion pipe (70).

9. The batching device according to claim 6, characterized in that: The dosing device further comprises a grid plate (100), wherein the grid plate (100) is arranged in the purification tank (60), and at least a part of the grid plate (100) is immersed in the purification solution.

10. A lithium carbonate production system, characterized in that: include: Reactor; The batching device according to any one of claims 1 to 9, wherein the discharge port of the batching box (10) is connected to the reaction kettle.

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