MVR (Mechanical Vapor Recompression) evaporation device for extracting lithium chloride from electrolytic aluminum ash lixivium

Abstract

The utility model relates to the technical field of electrolytic aluminum ash lixivium extraction, and discloses an MVR (mechanical vapor recompression) evaporation device for extracting lithium chloride from electrolytic aluminum ash lixivium, which comprises a base, the top of the base is fixedly connected with a first evaporator, one end of the first evaporator is communicated with a compressor through a pipeline, and the other end of the first evaporator is communicated with a second evaporator through a pipeline. One end of the compressor is communicated with a second evaporator through a pipeline, one end of the second evaporator is communicated with a crystallizer through a pipeline, the lower end of the crystallizer is communicated with a discharging pipe, and the bottom of the discharging pipe is communicated with a grinding box. Solid lithium chloride is discharged into the grinding box through the discharging pipe, the solid lithium chloride can accurately fall between the two grinding rollers through the material guiding plate, the motor is started and drives one of the fixing rods to rotate, and due to the fact that the two gears are meshed with each other, the two fixing rods rotate to drive the grinding rollers to rotate, so that the grinding effect is improved. And solid lithium chloride is ground into powder, the subsequent process requirements are met, the structure is compact, and the practicability is improved.

Description

Technical Field

[0001] This utility model relates to the field of extraction technology of electrolytic aluminum ash leachate, and in particular to an MVR evaporation device for extracting lithium chloride from electrolytic aluminum ash leachate. Background Technology

[0002] MVR evaporation is an evaporation technology that uses mechanical compression of secondary steam to increase steam temperature and pressure, thereby enabling reuse. In the process of extracting lithium chloride from electrolytic aluminum ash leaching solution, MVR evaporation is used to evaporate the water in the leaching solution, thereby increasing the concentration of lithium chloride and achieving the purpose of extraction and concentration.

[0003] Evaporation can remove water from the leachate, allowing lithium chloride to precipitate in solid form. However, the extracted lithium chloride is usually in solid form and needs to be further ground into powder to meet the requirements of subsequent processes. Existing grinding equipment is mostly independent equipment, requiring additional transportation and operation steps, which reduces its practicality. Therefore, we propose an MVR evaporation device for extracting lithium chloride from electrolytic aluminum ash leachate. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an MVR evaporation device for extracting lithium chloride from electrolytic aluminum ash leachate.

[0005] This utility model is achieved using the following technical solution: an MVR evaporation device for extracting lithium chloride from electrolytic aluminum ash leachate, comprising a base, a first evaporator fixedly connected to the top of the base, a compressor connected to one end of the first evaporator via a pipe, a second evaporator connected to one end of the compressor via a pipe, a crystallizer connected to one end of the second evaporator via a pipe, a discharge pipe connected to the lower end of the crystallizer, a grinding box connected to the bottom of the discharge pipe, a grinding assembly provided inside the grinding box, a discharge assembly provided at the lower end of the grinding assembly, and a collection box fixedly connected to the upper surface of the base;

[0006] The grinding assembly includes a motor, with a fixed rod fixedly connected to the output end of the motor, a grinding roller fixedly connected to the surface of the fixed rod, and a gear fixedly connected to one end of the fixed rod.

[0007] The above technical solution involves starting the motor, which drives one of the fixed rods to rotate. Due to the meshing of the two gears, the rotation of the two fixed rods causes the grinding roller to rotate, grinding the solid lithium chloride into powder to meet the requirements of subsequent processes. The structure is compact and its practicality is improved.

[0008] As a further improvement to the above solution, the rear end of the motor is fixedly connected to the front end of the grinding box, the surface of the fixing rod is rotatably connected to the inner wall of the grinding box, and there are two of each of the fixing rod, grinding roller and gear, with the two gears meshing with each other.

[0009] The above technical solution uses two grinding rollers rotating relative to each other to grind solid lithium chloride, ensuring uniform particle size of the lithium chloride powder.

[0010] As a further improvement to the above solution, the discharge assembly includes a discharge plate, a vibration motor is fixedly connected to the bottom of the discharge plate, a hinge seat is fixedly connected to the left end of the discharge plate, and a spring is fixedly connected to the bottom of the discharge plate.

[0011] By using the above technical solution, the vibration motor is started, and the discharge plate vibrates under the action of the vibration motor, so that the lithium chloride powder slides smoothly into the collection box, which is convenient for subsequent collection and avoids the phenomenon of blockage and material accumulation.

[0012] As a further improvement to the above solution, one end of the discharge plate extends to the outside of the grinding box, the discharge plate is located at the upper end of the collection box, the left end of the hinge seat is hinged to the inner wall of the grinding box, and the bottom of the spring is fixedly connected to the inner wall of the grinding box.

[0013] With the above technical solution, the discharge plate is hinged to the inner wall of the grinding box through the hinge seat, so that the discharge plate can rotate when it vibrates, and at the same time, it plays a limiting role in the discharge plate. Through the action of the spring, the discharge plate can reciprocate.

[0014] As a further improvement to the above solution, a guide plate is fixedly connected to the inner wall of the grinding box, and the guide plate is located at the upper end of the grinding roller.

[0015] The above technical solution guides the solid lithium chloride through a guide plate, allowing it to fall precisely between the two grinding rollers, thus ensuring the quality of subsequent grinding.

[0016] As a further improvement to the above solution, two guide plates are provided, and the two guide plates are symmetrically distributed with the grinding box as the center.

[0017] As a further improvement to the above solution, the bottoms of the compressor, the second evaporator, and the crystallizer are all fixedly connected to the top of the base, and the first evaporator is connected to the second evaporator through a pipe.

[0018] The above technical solution involves adding the leaching solution of electrolytic aluminum ash into the first evaporator, where the water in the leaching solution is evaporated and the lithium ions are gradually concentrated. The steam generated during the evaporation process enters the compressor through a pipe, where it is compressed a second time to increase its temperature and pressure. The leaching solution of electrolytic aluminum ash inside the first evaporator flows into the second evaporator through a pipe, and the compressed secondary steam is used as a heat source to supply the second evaporator to further evaporate the water in the concentrated solution. After two evaporation and concentration processes, the concentrated solution enters the crystallizer through a pipe, where the lithium chloride in the concentrated solution is gradually crystallized to form solid lithium chloride.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This invention features a grinding assembly and a guide plate. Specifically, solid lithium chloride is discharged into the grinding chamber through a discharge pipe. The guide plate ensures that the solid lithium chloride falls precisely between two grinding rollers. When the motor is started, it drives one of the fixed rods to rotate. Due to the meshing of two gears, the rotation of the two fixed rods causes the grinding rollers to rotate, grinding the solid lithium chloride into powder to meet the requirements of subsequent processes. The design is compact and improves practicality.

[0021] This invention features a discharge assembly and a collection box. Specifically, when powdered lithium chloride falls onto the discharge plate, a vibration motor is activated. The discharge plate vibrates under the action of the motor, allowing the lithium chloride powder to slide smoothly into the collection box for subsequent collection, while avoiding blockages and material accumulation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the grinding box of this utility model;

[0024] Figure 3 This utility model Figure 2 Enlarged structural diagram of section A in the middle;

[0025] Figure 4 This is a schematic diagram of the grinding box structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the material discharge component of this utility model.

[0027] Explanation of key symbols:

[0028] 1. Base; 2. First evaporator; 3. Compressor; 4. Second evaporator; 5. Crystallizer; 6. Discharge pipe; 7. Grinding box; 8. Grinding assembly; 801. Motor; 802. Fixing rod; 803. Grinding roller; 804. Gear; 9. Discharge assembly; 901. Discharge plate; 902. Vibrating motor; 903. Hinge seat; 904. Spring; 10. Collection box; 11. Guide plate. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] Example:

[0031] Please combine Figure 1-5 This embodiment of an MVR evaporation device for extracting lithium chloride from electrolytic aluminum ash leachate includes a base 1, a first evaporator 2 fixedly connected to the top of the base 1, a compressor 3 connected to one end of the first evaporator 2 via a pipe, a second evaporator 4 connected to one end of the compressor 3 via a pipe, a crystallizer 5 connected to one end of the second evaporator 4 via a pipe, a discharge pipe 6 connected to the lower end of the crystallizer 5, a grinding box 7 connected to the bottom of the discharge pipe 6, a grinding assembly 8 disposed inside the grinding box 7, a discharge assembly 9 disposed at the lower end of the grinding assembly 8, and a collection box 10 fixedly connected to the upper surface of the base 1.

[0032] The grinding assembly 8 includes a motor 801, with a fixed rod 802 fixedly connected to the output end of the motor 801. A grinding roller 803 is fixedly connected to the surface of the fixed rod 802, and a gear 804 is fixedly connected to one end of the fixed rod 802. The lithium chloride in the concentrate is gradually crystallized by the crystallizer 5 to form solid lithium chloride, which is discharged into the interior of the grinding box 7 through the discharge pipe 6. When the motor 801 is started, it drives one of the fixed rods 802 to rotate. Since the two gears 804 mesh with each other, the rotation of the two fixed rods 802 drives the grinding roller 803 to rotate, grinding the solid lithium chloride into powder to meet the requirements of subsequent processes. The structure is compact and improves practicality.

[0033] The rear end of the motor 801 is fixedly connected to the front end of the grinding box 7, and the surface of the fixing rod 802 is rotatably connected to the inner wall of the grinding box 7. There are two fixing rods 802, two grinding rollers 803 and two gears 804, and the two gears 804 mesh with each other.

[0034] The discharge assembly 9 includes a discharge plate 901, a vibration motor 902 fixedly connected to the bottom of the discharge plate 901, a hinge seat 903 fixedly connected to the left end of the discharge plate 901, and a spring 904 fixedly connected to the bottom of the discharge plate 901. When powdered lithium chloride falls onto the discharge plate 901, the vibration motor 902 is activated, and the discharge plate 901 vibrates under the action of the vibration motor 902, so that the lithium chloride powder slides smoothly into the collection box 10 for subsequent collection, while avoiding blockage and material accumulation.

[0035] One end of the discharge plate 901 extends to the outside of the grinding box 7. The discharge plate 901 is located at the upper end of the collection box 10. The left end of the hinge seat 903 is hinged to the inner wall of the grinding box 7. The bottom of the spring 904 is fixedly connected to the inner wall of the grinding box 7.

[0036] A guide plate 11 is fixedly connected to the inner wall of the grinding box 7. The guide plate 11 is located at the upper end of the grinding roller 803. The solid lithium chloride can fall accurately between the two grinding rollers 803 through the guide plate 11, which is convenient for subsequent grinding.

[0037] There are two guide plates 11, which are symmetrically distributed around the grinding box 7.

[0038] The bottoms of compressor 3, second evaporator 4 and crystallizer 5 are all fixedly connected to the top of base 1, and first evaporator 2 is connected to second evaporator 4 through pipe.

[0039] The implementation principle of the MVR evaporation device for extracting lithium chloride from electrolytic aluminum ash leachate in this embodiment is as follows: During use, the electrolytic aluminum ash leachate is added to the interior of the first evaporator 2. The first evaporator 2 evaporates the water in the leachate, gradually concentrating the lithium ions. The steam generated during evaporation enters the compressor 3 through a pipe. The compressor 3 compresses the steam a second time, increasing its temperature and pressure. The electrolytic aluminum ash leachate inside the first evaporator 2 flows into the interior of the second evaporator 4 through a pipe. The compressed secondary steam serves as a heat source for the second evaporator 4, further evaporating and concentrating the water in the solution. After two evaporation and concentration processes, the concentrated solution enters the interior of the crystallizer 5 through a pipe, where the lithium chloride in the concentrated solution gradually crystallizes. Solid lithium chloride is formed and discharged into the grinding box 7 through the discharge pipe 6. The guide plate 11 ensures that the solid lithium chloride falls precisely between the two grinding rollers 803. The motor 801 is started, which drives one of the fixed rods 802 to rotate. Due to the meshing of the two gears 804, the rotation of the two fixed rods 802 drives the grinding rollers 803 to rotate, grinding the solid lithium chloride into powder to meet the requirements of subsequent processes. The compact structure improves practicality. The powdered lithium chloride falls onto the discharge plate 901. The vibration motor 902 is started, and the discharge plate 901 vibrates under the action of the vibration motor 902, allowing the lithium chloride powder to slide smoothly into the collection box 10 for subsequent collection, while avoiding blockage and material accumulation.

[0040] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An MVR evaporation apparatus for extracting lithium chloride from an electrolytic aluminum dross leachate, characterized by, The utility model relates to a kind of crystallization device, including base (1), the top of the base (1) is fixedly connected with first evaporator (2), one end of the first evaporator (2) is communicated with compressor (3) by pipeline, one end of the compressor (3) is communicated with second evaporator (4) by pipeline, one end of the second evaporator (4) is communicated with crystallizer (5) by pipeline, the lower end of the crystallizer (5) is communicated with discharge pipe (6), the bottom of the discharge pipe (6) is communicated with grinding box (7), the inside of the grinding box (7) is provided with grinding assembly (8), the lower end of the grinding assembly (8) is provided with discharge assembly (9), the upper surface of the base (1) is fixedly connected with collection box (10); The grinding assembly (8) includes a motor (801), the output end of the motor (801) is fixedly connected with a fixed rod (802), the surface of the fixed rod (802) is fixedly connected with a grinding stick (803), one end of the fixed rod (802) is fixedly connected with a gear (804).

2. The MVR evaporation device for extracting lithium chloride from electrolytic aluminum ash leaching solution according to claim 1, characterized in that: The rear end of the motor (801) is fixedly connected with the front end of the grinding box (7), the surface of the fixed rod (802) is rotatably connected with the inner wall of the grinding box (7), the number of the fixed rod (802), the grinding stick (803) and the gear (804) is two, and the two gears (804) are engaged with each other.

3. The MVR evaporation device for extracting lithium chloride from electrolytic aluminum ash leaching solution according to claim 1, characterized in that: The discharge assembly (9) includes a discharge plate (901), the bottom of the discharge plate (901) is fixedly connected with a vibration motor (902), the left end of the discharge plate (901) is fixedly connected with a hinged seat (903), and the bottom of the discharge plate (901) is fixedly connected with a spring (904).

4. The MVR evaporation apparatus for extracting lithium chloride from an aluminum electrolysis dreg leaching solution according to claim 3, characterized in that: One end of the discharge plate (901) extends to the outside of the grinding box (7), the discharge plate (901) is located at the upper end of the collection box (10), the left end of the hinged seat (903) is hinged with the inner wall of the grinding box (7), and the bottom of the spring (904) is fixedly connected with the inner wall of the grinding box (7).

5. The MVR evaporation apparatus for extracting lithium chloride from electrolytic aluminum ash leachate according to claim 4, characterized in that: The inner wall of the grinding box (7) is fixedly connected with a guide plate (11), and the guide plate (11) is located at the upper end of the grinding stick (803).

6. The MVR evaporation apparatus for extracting lithium chloride from an aluminum electrolysis dreg leaching solution according to claim 5, characterized in that: The number of the guide plate (11) is two, and the two guide plates (11) are symmetrically distributed with the grinding box (7) as the center.

7. The MVR evaporation apparatus for extracting lithium chloride from electrolytic aluminum ash leachate according to claim 1, characterized in that: The bottom of the compressor (3), the second evaporator (4) and the crystallizer (5) is fixedly connected with the top of the base (1), and the first evaporator (2) is communicated with the second evaporator (4) by pipeline.

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