A semi-continuous feeding device for lithium electrolytic cells

Abstract

The present invention relates to the field of lithium electrolysis production technology, specifically a semi-continuous unloading device for a lithium electrolytic cell, comprising a flow guide device, a heating silo and a unloading mechanism, the unloading mechanism comprising a discharge channel, a discharge section, a material control body and a power source, the discharge channel being vertically arranged, the discharge section having a diameter larger than the discharge channel, the discharge channel being connected to the bottom of the heating silo and the discharge section, the discharge section being connected to the flow guide device, the power source being used to drive the material control body to and from between the heating silo and the discharge section, a material storage area being provided in the center of the material control body, when the material control body is located in the heating silo or the discharge section, the edge of one end of the material control body is in contact with the inner wall of the discharge channel, and when the material control body is located as a whole in the discharge channel, the edges of both ends of the material control body are in contact with the inner wall of the discharge channel. By providing the unloading mechanism, periodic semi-continuous unloading is achieved, the sealing is better, and the material can be unloaded stably and quantitatively, and by providing the heating silo, a large amount of raw materials can be stored, reducing the probability of water absorption.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium electrolysis production, in particular to a semi-continuous feeding device for a lithium electrolytic cell. Background Art

[0002] In the lithium metal electrolysis industry, anhydrous lithium chloride is the primary raw material for producing lithium metal using molten salt electrolysis. This highly absorbs water, and the resulting high-water content of lithium chloride can cause serious production safety accidents during the electrolysis process. Consequently, stringent requirements are placed on the sealing performance of the feedstock delivery system for lithium electrolytic cells. Furthermore, as lithium electrolysis is a continuous production process, the stability of the feedstock delivery significantly impacts the overall stability of the lithium electrolysis production process, placing even higher demands on the feedstock delivery system itself.

[0003] In order to meet the above requirements, the existing Chinese utility model patent with publication number CN220284247U discloses a metal lithium electrolytic cell automatic feeding device, in which the unloading process is to use a screw conveyor shaft to transport the lithium chloride heated by the heating assembly to the electrolytic cell. However, the device is continuous unloading and cannot be accurately quantified, and the screw conveyor shaft is driven by a motor. The high-frequency vibration of the motor and the continuous movement of the screw conveyor shaft will affect the sealing of the entire device, resulting in an increase in the water content of the raw material lithium chloride. The Chinese invention patent with publication number CN104404571A discloses a spring-type lithium electrolytic cell feeding device, which is preheated by the heat of the electrolytic cell through a pre-arranged storage part, and the lithium chloride is pushed into the electrolytic cell by a manually driven transmission device. There is a problem of large manual operation volume, and the device is not provided with a long-term, large-capacity storage device, so there is also a problem of insufficient raw material inventory.

[0004] In view of the many drawbacks of the current lithium electrolytic cell unloading device, it is difficult to meet the current requirements for the lithium electrolytic cell unloading device. Therefore, based on the existing technology, how to stably and conveniently input lithium chloride raw materials and reduce the water content of the raw materials as much as possible during unloading is a problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a semi-continuous unloading device for a lithium electrolytic cell. By setting a unloading mechanism, the material control body moves back and forth between the heating silo and the discharge section to achieve periodic semi-continuous unloading, with better sealing and stable quantitative unloading. By setting a heating silo, a large amount of raw materials can be stored, and the raw materials can be kept dry in a heated environment, reducing the probability of water absorption.

[0006] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0007] A semi-continuous unloading device for a lithium electrolytic cell comprises a flow guiding device, which is connected to the lithium electrolytic cell, and also comprises a heating silo and a unloading mechanism, wherein the unloading mechanism comprises a unloading channel, a unloading section, a material control body and a power source, wherein the unloading channel is vertically arranged, the diameter of the unloading section is larger than the diameter of the unloading channel, one end of the unloading channel is connected to the bottom of the heating silo, and the other end is connected to one end of the unloading section, and the other end of the unloading section is connected to the flow guiding device, and the power source is used to drive the material control body to and from between the heating silo and the unloading section, and a material storage area is provided in the center of the material control body, when the material control body is located in the heating silo or the unloading section, the edge of one end of the material control body is in contact with the inner wall of the unloading channel, and when the material control body is located as a whole in the unloading channel, the edges of both ends of the material control body are in contact with the inner wall of the unloading channel.

[0008] By incorporating a feeding mechanism, the material control body moves back and forth between the heating silo and the discharge section, achieving semi-continuous feeding. Compared to continuous feeding, this reduces vibration and provides better sealing. Furthermore, the material control body delivers a consistent amount of raw material each time it travels back and forth, enabling stable, quantitative feeding. The heating silo allows for the simultaneous storage of large quantities of raw material while heating it. The raw material remains dry in the heated environment, reducing the likelihood of water absorption.

[0009] Furthermore, the shape of the material control body is a cone of equal size with two connected tips, the rotation axes of the two cones are on the same straight line, the center of the discharge section protrudes outward, and the inclined surface formed at the connection between the most protruding part of the discharge section and the discharge channel is parallel to the conical surface of the material control body. When the material control body is located in the discharge section, the bottom surface of the material control body and the most protruding part of the discharge section are on the same plane.

[0010] By specifically designing the structure of the material control body and the material discharge section, the raw materials transported by the material control body in a single round trip can fall completely into the guide device, avoiding any residue, thereby achieving a higher degree of consistency in the amount of raw materials transported in each round trip. At the same time, the parallel arrangement of the material control body and the material discharge section makes the raw materials fall more smoothly.

[0011] Furthermore, the bottom of the heating silo is in the shape of a cone with the small end facing downward, and the inclination angle of the conical surface of the heating silo and the conical surface of the material control body to the horizontal direction is greater than 55 degrees.

[0012] By limiting the inclination angle of the cone, the raw materials can slide smoothly along the cone.

[0013] Furthermore, the heating silo includes a silo body and an outer shell, the outer shell is arranged outside the silo body, and the gap between the outer shell and the silo body serves as a heating zone.

[0014] By setting up the heating zone, the entire warehouse can be heated, so that the raw materials in the warehouse can be kept dry.

[0015] Furthermore, the outer wall of the shell is provided with heat-insulating material.

[0016] By installing thermal insulation materials on the outer wall, heat loss to the outside is prevented, the heating efficiency is improved, and it is beneficial to keep the interior of the warehouse dry.

[0017] Furthermore, high-temperature gas is introduced into the heating zone.

[0018] The high-temperature gas generated during the lithium electrolysis production process can be input into the heating zone for waste heat utilization, reducing heating costs.

[0019] Furthermore, the heating zone is provided with a resistance wire.

[0020] By setting the resistance wire, the heating efficiency of the heating zone is higher and the temperature is easier to control.

[0021] Furthermore, the heating zone is provided with a thermocouple, and the temperature of the heating zone is controlled in real time by setting the thermocouple.

[0022] Furthermore, the power source is arranged on the top of the heating silo, and the power source is connected to the material control body through a transmission shaft. The power source is pneumatic or electric.

[0023] By setting up a pneumatic or electric power source, manual conveying is replaced, making the unloading process efficient and convenient.

[0024] Furthermore, a material level meter is provided inside the heating silo, through which the remaining situation of the raw materials in the silo and the amount of material discharged can be known in real time.

[0025] The beneficial effects of the present invention are:

[0026] The present invention provides a semi-continuous unloading device for lithium electrolytic cells. By providing an unloading mechanism, a material control body moves back and forth between a heated silo and a discharge section, achieving periodic semi-continuous unloading. Compared to continuous unloading, this reduces vibration and provides improved sealing. Furthermore, the amount of raw material transported by the material control body during each round trip is consistent, enabling stable quantitative unloading. The provision of a heated silo allows for simultaneous storage of large quantities of raw materials, which can be kept dry in the heated environment, reducing the likelihood of water absorption. Furthermore, the unloading mechanism utilizes an electric or pneumatic power source, replacing manual conveying, making the unloading process efficient and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of a semi-continuous feeding device for a lithium electrolytic cell according to the present invention;

[0028] Figure 2 This is a schematic plan view of the structure of a semi-continuous feeding device for a lithium electrolytic cell according to the present invention;

[0029] Figure 3 This is a structural schematic diagram of the material control body of the present invention when it is located at the upper position;

[0030] Figure 4 This is a structural schematic diagram of the material control body of the present invention when it is in the middle position;

[0031] Figure 5 This is a structural schematic diagram of the material control body of the present invention when it is in the lower position;

[0032] Figure 6 The present invention is a schematic diagram of the three-dimensional structure of a semi-continuous feeding device for a lithium electrolytic cell provided with a resistance wire.

[0033] In the figure: 1. Heating silo; 1-1. Silo body; 1-2. Outer shell; 1-3. Thermocouple; 1-4. Level meter; 1-5. High-temperature gas inlet; 1-6. High-temperature gas outlet; 1-7. Resistance wire; 2. Discharging mechanism; 2-1. Discharging channel; 2-2. Discharging section; 2-3. Material control body; 2-4. Power source; 3. Diversion device; 4. Emergency discharging port. DETAILED DESCRIPTION

[0034] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below with reference to the accompanying drawings and through specific embodiments. Figure 1 While the accompanying drawings illustrate exemplary embodiments of the present invention, it should be understood that the present invention may be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to facilitate a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0035] like Figures 1-6 As shown, a semi-continuous unloading device for a lithium electrolytic cell includes a flow guide device 3, which is connected to the lithium electrolytic cell, and also includes a heating silo 1 and a unloading mechanism 2, wherein the unloading mechanism 2 includes a discharge channel 2-1, a discharge section 2-2, a material control body 2-3 and a power source 2-4, wherein the discharge channel 2-1 is vertically arranged, and the diameter of the discharge section 2-2 is larger than the diameter of the discharge channel 2-1, and one end of the discharge channel 2-1 is connected to the bottom of the heating silo 1, and the other end is connected to one end of the discharge section 2-2. The other end of the material section 2-2 is connected to the guide device 3, and the power source 2-4 is used to drive the material control body 2-3 to move back and forth between the heating silo 1 and the discharge section 2-2. A storage area is provided in the center of the material control body 2-3. When the material control body 2-3 is located in the heating silo 1 or the discharge section 2-2, the edge of one end of the material control body 2-3 is in contact with the inner wall of the discharge channel 2-1. When the material control body 2-3 is located as a whole in the discharge channel 2-1, the edges of both ends of the material control body 2-3 are in contact with the inner wall of the discharge channel 2-1.

[0036] By providing a material discharge mechanism 2, the material control body 2-3 moves back and forth between the heating silo 1 and the discharge section 2-2, achieving periodic semi-continuous material discharge. Compared to continuous material discharge, this reduces vibration and improves sealing. Furthermore, the material control body 2-3 transports a consistent amount of raw material each time it travels back and forth, achieving stable quantitative material discharge. The provision of the heating silo 1 allows for the simultaneous storage of large quantities of raw materials while heating them. The raw materials remain dry in the heated environment, reducing the likelihood of water absorption.

[0037] Specifically, the shape of the material control body 2-3 is a cone of equal size with two connected tips, the rotation axes of the two cones are on the same straight line, the center of the discharge section 2-2 protrudes outward, and the inclined surface formed by the connection between the most protruding part of the discharge section 2-2 and the discharge channel 2-1 is parallel to the conical surface of the material control body 2-3. When the material control body 2-3 is located in the discharge section 2-2, the bottom surface of the material control body 2-3 and the most protruding part of the discharge section 2-2 are on the same plane.

[0038] By specifically arranging the structure of the material control body 2-3 and the material discharge section 2-2, the raw materials transported by the material control body 2-3 in a single round trip can fall completely into the guide device 3, avoiding any residue, thereby achieving a higher degree of consistency in the amount of raw materials transported in each round trip. At the same time, the parallel arrangement of the material control body 2-3 and the material discharge section 2-2 makes the raw materials fall more smoothly.

[0039] Specifically, the bottom of the heating silo 1 is a cone with the small end facing downward, and the inclination angle of the cone surface of the heating silo 1 and the cone surface of the material control body 2-3 to the horizontal direction is greater than 55 degrees.

[0040] By limiting the inclination angle of the cone, the raw materials can slide smoothly along the cone.

[0041] Specifically, the heating silo 1 includes a silo body 1-1 and an outer shell 1-2. The outer shell 1-2 is arranged outside the silo body 1-1, and the gap between the outer shell 1-2 and the silo body 1-1 serves as a heating zone.

[0042] By setting up the heating zone, the entire silo 1 - 1 can be heated, so that the raw materials in the silo 1 - 1 can be kept dry.

[0043] Specifically, the outer wall of the shell 1-2 is provided with heat-insulating material.

[0044] By providing thermal insulation material on the outer wall, heat loss to the outside is prevented, the heating efficiency is improved, and it is beneficial to keep the interior of the warehouse body 1-1 dry.

[0045] Specifically, high-temperature gas is introduced into the heating zone.

[0046] The high-temperature gas generated during the lithium electrolysis process can be fed into the heating zone for waste heat utilization, reducing heating costs. After dust removal and heat exchange, the high-temperature gas enters the heating zone through the high-temperature gas inlets 1-5 located at the top of the heating zone and leaves the heating zone through the high-temperature gas outlets 1-6 located at the bottom of the heating zone. Figure 1 and Figure 2 The specific structure when high-temperature gas is introduced into the heating zone is shown. Under this structure, the height of the feeding device is 0.6435m and the effective cross-sectional area is 0.0314m 2 The single feeding amount is 9.61kg and the feeding frequency is 12 minutes / time.

[0047] Specifically, the heating zone is provided with resistance wires 1-7.

[0048] By setting the resistance wires 1-7, the heating efficiency of the heating zone is higher and the temperature is easier to control. Figure 6 The specific structure when the heating zone is provided with resistance wires 1 to 7 is shown. Under this structure, the single feeding amount is 2.8 kg and the feeding frequency is 88 seconds / time.

[0049] Specifically, the heating zone is provided with thermocouples 1-3. The temperature of the heating zone is controlled in real time by providing the thermocouples 1-3.

[0050] Specifically, the power source 2-4 is provided on the top of the heating silo 1, and the power source 2-4 is connected to the material control body 2-3 via a transmission shaft. The power source 2-4 is pneumatic or electric.

[0051] By setting a pneumatic or electric power source 2-4, manual conveying is replaced, making the unloading process efficient and convenient.

[0052] Specifically, a material level meter 1-4 is provided inside the heating silo 1. By providing the material level meter 1-4, the remaining situation of the raw materials in the silo 1-1 and the amount of the raw materials discharged can be known in real time.

[0053] Specifically, the flow guide device 3 is a flow guide tube, which has an inclination angle greater than 55 degrees to the horizontal direction. An emergency discharge port 4 is provided at the connection between the flow guide tube and the lithium electrolytic cell. In the event of a device failure or maintenance, manual discharge can be performed through the emergency discharge port 4.

[0054] The unloading process of this device is as follows:

[0055] The power source 2-4 pulls the material control body 2-3 to the upper position, such as Figure 3As shown, the upper position is the top of the material control body 2-3, which is located inside the heating silo 1. The edge of the bottom end is in contact with the inner wall of the discharge channel 2-1. The bottom end of the material control body 2-3 plays a sealing role. The raw materials flow into the storage area of the material control body 2-3 under the action of gravity. The power source 2-4 pushes the material control body 2-3 downward. During the pushing process, the storage area of the material control body 2-3 is filled with the inflowing raw materials, and the material control body 2-3 is pushed down to the lower position, as shown in FIG. Figure 5 As shown, the lower position is when the top of the material control body 2-3 is in contact with the inner wall of the discharge channel 2-1, and the bottom surface of the material control body 2-3 is in the same plane as the most protruding part of the discharge section 2-2. At this time, the top of the material control body 2-3 acts as a seal, and the raw materials flow out of the storage area under the action of gravity and enter the lithium electrolytic cell through the guide device 3. The power source 2-4 repeatedly pushes and pulls the material control body 2-3 to achieve periodic quantitative material discharge.

[0056] When the power source 2-4 pulls up or pushes down the material control body 2-3, the material control body 2-3 passes through the middle position, such as Figure 4 As shown, the middle position is when the material control body 2-3 is located entirely in the material discharge channel 2-1, and the edges of both ends of the material control body 2-3 fit in with the inner wall of the material discharge channel 2-1, and both ends play a role in sealing the material.

[0057] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A semi-continuous feeding device for a lithium electrolytic cell, comprising a flow guiding device (3), wherein the flow guiding device (3) is connected to the lithium electrolytic cell, and is characterized in that: The invention also includes a heating silo (1) and a discharge mechanism (2), wherein the discharge mechanism (2) includes a discharge channel (2-1), a discharge section (2-2), a material control body (2-3) and a power source (2-4), wherein the discharge channel (2-1) is vertically arranged, the diameter of the discharge section (2-2) is larger than the diameter of the discharge channel (2-1), one end of the discharge channel (2-1) is connected to the bottom of the heating silo (1), and the other end is connected to one end of the discharge section (2-2), and the other end of the discharge section (2-2) is connected to the guide device (3), The power source (2-4) is used to drive the material control body (2-3) to move back and forth between the heating silo (1) and the discharge section (2-2). A material storage area is provided at the center of the material control body (2-3). When the material control body (2-3) is located in the heating silo (1) or the discharge section (2-2), the edge of one end of the material control body (2-3) fits in contact with the inner wall of the discharge channel (2-1). When the material control body (2-3) is entirely located in the discharge channel (2-1), the edges of both ends of the material control body (2-3) fit in contact with the inner wall of the discharge channel (2-1). The material control body (2-3) has an outer shape of two cones of equal size connected at the tips, the rotation axes of the two cones are on the same straight line, the center of the material discharge section (2-2) protrudes outward, the inclined surface formed at the connection between the most protruding part of the material discharge section (2-2) and the material discharge channel (2-1) is parallel to the conical surface of the material control body (2-3), and when the material control body (2-3) is located in the material discharge section (2-2), the bottom surface of the material control body (2-3) and the most protruding part of the material discharge section (2-2) are on the same plane; The bottom of the heating silo (1) is in a conical shape with the small end facing downwards, and the inclination angle of the conical surface of the heating silo (1) and the conical surface of the material control body (2-3) to the horizontal direction is greater than 55 degrees.

2. A semi-continuous feeding device for a lithium electrolytic cell according to claim 1, characterized in that: The heating silo (1) comprises a silo body (1-1) and an outer shell (1-2); the outer shell (1-2) is arranged outside the silo body (1-1); and a gap between the outer shell (1-2) and the silo body (1-1) serves as a heating zone.

3. A semi-continuous feeding device for a lithium electrolytic cell according to claim 2, characterized in that: The outer wall of the shell (1-2) is provided with heat-insulating material.

4. A semi-continuous feeding device for a lithium electrolytic cell according to claim 2, characterized in that: High-temperature gas is introduced into the heating zone.

5. A semi-continuous feeding device for a lithium electrolytic cell according to claim 2, characterized in that: The heating zone is provided with a resistance wire (1-7).

6. A semi-continuous feeding device for a lithium electrolytic cell according to claim 2, characterized in that: The heating zone is provided with thermocouples (1-3).

7. A semi-continuous feeding device for a lithium electrolytic cell according to claim 1, characterized in that: The power source (2-4) is arranged on the top of the heating silo (1), and the power source (2-4) is connected to the material control body (2-3) through a transmission shaft. The power source (2-4) is pneumatic or electric.

8. A semi-continuous feeding device for a lithium electrolytic cell according to claim 1, characterized in that: A material level meter (1-4) is provided inside the heating silo (1).

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