Novel lithium sulfide reactor
By designing a novel lithium sulfide reactor, employing a multi-part structure and filter system, and combining real-time monitoring and an electric heater, the problems of low reaction efficiency and poor safety in existing technologies have been solved, achieving efficient and safe lithium sulfide preparation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-03-10
AI Technical Summary
Existing lithium sulfide preparation technologies suffer from low reaction efficiency, severe byproduct pollution, and high equipment complexity. In particular, fluidized bed reactors pose a high risk of gas leakage, while stirred reactors have poor airtightness, leading to incomplete reactions and low safety.
A novel lithium sulfide reactor was designed, employing an upper cylindrical body, a middle conical body, and a lower cylindrical body structure. Combined with a filter mounting bracket and filter body, the gas flow rate is reduced. Multiple monitoring ports are set up for real-time temperature and pressure monitoring to ensure that the reaction proceeds under suitable conditions, and a stable temperature support is provided by an electric heater.
It significantly improves reaction uniformity and efficiency, reduces dust diffusion, lowers equipment maintenance costs, ensures reactor safety and airtightness, and is suitable for toxic gas environments.
Smart Images
Figure CN223980478U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas-solid reactor technology, and in particular to a novel lithium sulfide reactor. Background Technology
[0002] Lithium sulfide (Li2S) is a core material for all-solid-state lithium-ion batteries (such as sulfide solid electrolytes) and a key raw material for the cathode of lithium-sulfur batteries. Its efficient and low-cost preparation technology has attracted much attention. At present, the mainstream preparation method is to achieve solid-gas or solid-solid reactions between lithium sources (such as lithium hydroxide, lithium carbonate, lithium metal, etc.) and sulfur sources (such as hydrogen sulfide, sulfur, organic sulfides, etc.).
[0003] However, existing technologies generally suffer from the following problems:
[0004] Low reaction efficiency: In traditional methods, solid-gas reactions are limited by poor powder flowability and low gas diffusion efficiency, resulting in incomplete reactions.
[0005] Byproducts and pollution: For example, the reaction of lithium hydroxide with hydrogen sulfide to produce water can easily lead to powder agglomeration or equipment corrosion.
[0006] Equipment complexity and cost: Existing reactors (such as rotary kilns and stirred reactors) have rotating mechanical structures, which pose a risk of gas leakage (especially when using toxic hydrogen sulfide), resulting in low safety and high maintenance costs.
[0007] The existing reactor has the following problems:
[0008] Flow bed reactor: Powder is suspended by gas flow to promote reaction, but high gas velocity and large gas flow rate are required. A large amount of gas will carry out a lot of dust, reducing the reaction yield. A large number of powder particles will accumulate at the bottom of the bed, resulting in low reaction uniformity and efficiency.
[0009] Rotary kiln: It mixes materials by rotating them at low speed, but the filling rate is low (<50%), a large amount of gas does not participate in the reaction, and the powder is prone to agglomeration due to moisture. It is inefficient, the equipment has rotating mechanical parts, poor airtightness, and is not suitable for toxic gases.
[0010] Stirred reactors: They use internal stirring blades to enhance mixing, but the stirring shaft is a rotating mechanical component with poor airtightness, which can easily lead to gas leakage and makes them unsuitable for toxic gases. The stirring blind zone still has problems with the area near the powder and the uniformity of the reaction. The gas-solid contact area is small, resulting in low reaction efficiency. Utility Model Content
[0011] The purpose of this invention is to provide a novel lithium sulfide reactor, which solves the aforementioned problems when used in operation.
[0012] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A novel lithium sulfide reactor, comprising an upper cylinder, a middle cone, and a lower cylinder. The middle cone is located at the bottom of the upper cylinder, and a section of the lower cylinder is located at the bottom of the middle cone. A flange is provided between the middle cone and the lower cylinder. An upper end cap is located at the top of the upper cylinder, and a cylinder flange is provided between the upper end cap and the upper cylinder. A filter mounting bracket and a filter body are provided inside the upper cylinder. A lower enlarged section is located at the bottom of the lower cylinder. A feed inlet is located on the left side of the lower enlarged section. Two sections of the lower cylinder are located at the bottom of the lower enlarged section. A flange is provided between the two sections of the lower cylinder. A flange is provided between the lower enlarged section and the lower cylinder near its bottom. A discharge port is located at the bottom of the lowest section of the lower cylinder.
[0013] Preferably, an air outlet is provided at the middle position of the top of the upper end cap, and a pressure monitoring port is provided on the right side of the top of the upper end cap. The upper end cap is connected to the upper cylinder through a cylinder flange.
[0014] Preferably, the filter body is installed inside the upper cylinder via a filter mounting bracket, and a spring compensation is provided between the filter mounting bracket and the filter body.
[0015] Preferably, a pressure monitoring port 2 is provided on the left side of the upper cylinder, and a temperature monitoring port 1 is provided on the right side of the upper cylinder.
[0016] Preferably, the middle cone is connected to a lower section of the bottom cylinder via flange one, and a temperature monitoring port two is provided on the left side of the lower section of the bottom cylinder of the middle cone.
[0017] Preferably, a temperature monitoring port three is also provided on the left side of the lower enlarged section, and the temperature monitoring port three is located below the feed inlet.
[0018] Preferably, a temperature monitoring port is provided on the left side of the first section of the lower cylinder at the bottom of the lower enlargement section, and an air inlet is provided on the left side of the second section of the lower cylinder at the bottom of the lower enlargement section.
[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0020] 1. This utility model provides a novel lithium sulfide reactor. Existing fluidized bed reactors require a large amount of gas and generate a large amount of dust, with a large number of powder particles accumulating at the bottom of the bed, resulting in low reaction uniformity and efficiency. This novel lithium sulfide reactor, on the one hand, uses process gas introduced through the inlet primarily for reaction participation, unlike fluidized bed reactors which rely on a large amount of gas to fluidize the material, significantly reducing the required gas volume. On the other hand, its internal filter mounting bracket and filter body effectively filter and intercept the dust generated during the reaction, preventing large-scale dust diffusion. Simultaneously, the optimized structural design ensures orderly material flow, reducing dust generation due to material tumbling and collision, solving the problems of excessive dust and powder particle aggregation, and greatly improving reaction uniformity and efficiency.
[0021] 2. This utility model provides a novel lithium sulfide reactor with pressure monitoring ports located at different positions within the reactor, such as: pressure monitoring port one on the right side of the top of the upper head; pressure monitoring port two on the left side of the upper cylinder; temperature monitoring port one on the right side of the upper cylinder; temperature monitoring port two on the left side of the lower cylinder at the bottom of the middle cone; temperature monitoring port three on the left side of the lower enlarged section; and temperature monitoring port four on the left side of the lower cylinder at the bottom of the first section of the lower enlarged section. These pressure and temperature monitoring ports can be equipped with remote or local monitoring instruments, enabling comprehensive, real-time, and accurate monitoring of the pressure and temperature within the reactor. This ensures that the reaction is always carried out under suitable process conditions of 100-450℃, effectively improving reaction uniformity and efficiency.
[0022] 3. The reactor consists of multiple parts, including an upper cylindrical body, a middle conical body, and a lower cylindrical body. These parts are connected by flanges. This connection method not only ensures the reactor's structural stability but also facilitates installation and disassembly, making subsequent maintenance, cleaning, and component replacement easier. Furthermore, the inlet, outlet, and other interfaces can utilize various connection methods such as flanges and threads, allowing for easy connection to external piping and equipment, and adapting to different process pipeline installation requirements. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the elevation structure of this utility model;
[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of the upper cylindrical body of this utility model.
[0025] The following are the annotations in the diagram: 1. Air outlet; 2. Pressure monitoring port one; 3. Upper end cap; 4. Cylinder flange; 5. Filter mounting bracket; 6. Filter body; 7. Upper cylinder; 8. Pressure monitoring port two; 9. Temperature monitoring port one; 10. Middle cone; 11. Flange one; 12. Temperature monitoring port two; 13. Feed inlet; 14. Lower enlarged section; 15. Temperature monitoring port three; 16. Flange two; 17. Temperature monitoring port four; 18. Flange three; 19. Air inlet; 20. Lower cylinder; 21. Discharge outlet. Detailed Implementation
[0026] 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.
[0027] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.
[0028] Combination Figure 1 and Figure 2 As shown, this utility model discloses a novel lithium sulfide reactor, comprising an upper cylindrical body 7, a middle conical body 10, and a lower cylindrical body 20. The middle conical body 10 is located at the bottom of the upper cylindrical body 7, and a section of the lower cylindrical body 20 is located at the bottom of the middle conical body 10. A flange 11 is provided between the middle conical body 10 and the lower cylindrical body 20. An upper end cap 3 is located at the top of the upper cylindrical body 7, and a cylindrical flange 4 is provided between the upper end cap 3 and the upper cylindrical body 7. The interior of the upper cylindrical body 7 is... The filter is equipped with a filter mounting bracket 5 and a filter body 6. The bottom of the lower cylinder 20 is provided with a lower enlarged section 14. The left side of the lower enlarged section 14 is provided with a feed inlet 13. The bottom of the lower enlarged section 14 is provided with two lower cylinder sections 20. A flange 3 18 is provided between the two lower cylinder sections 20. A flange 2 16 is provided between the lower enlarged section 14 and the lower cylinder 20 near its bottom. The bottom of the lowest lower cylinder section 20 is provided with a discharge port 21.
[0029] An air outlet 1 is provided at the middle position of the top of the upper end cap 3, and a pressure monitoring port 2 is provided on the right side of the top of the upper end cap 3. The upper end cap 3 is connected to the upper cylinder 7 through the cylinder flange 4.
[0030] The filter body 6 is installed inside the upper cylinder 7 via the filter mounting bracket 5, and a spring compensation is provided between the filter mounting bracket 5 and the filter body 6.
[0031] A pressure monitoring port 2 8 is provided on the left side of the upper cylinder 7, and a temperature monitoring port 1 9 is provided on the right side of the upper cylinder 7.
[0032] The middle cone 10 is connected to the lower section of the bottom cylinder 20 via flange 11. A temperature monitoring port 22 is provided on the left side of the lower section of the bottom cylinder 20 of the middle cone 10.
[0033] Temperature monitoring port 3 15 is also provided on the left side of the lower enlarged section 14, and temperature monitoring port 3 15 is located below the feed inlet 13.
[0034] Temperature monitoring port 17 is provided on the left side of the first section of the lower cylinder 20 at the bottom of the lower enlarged section 14, and air inlet 19 is provided on the left side of the second section of the lower cylinder 20 at the bottom of the lower enlarged section 14.
[0035] Specifically, the reactor body is covered with an electric heater to ensure that the equipment reaches the process temperature;
[0036] Pressure monitoring port 2 is used to install remote or local pressure monitoring instruments. There can be multiple monitoring ports, and they can be connected by flanges, threads, etc. The upper end cap 3 is provided with an air outlet 1, which can be connected by flanges, threads, etc.
[0037] Pressure monitoring port 28 is used to install remote or local pressure monitoring instruments. There can be multiple monitoring ports, and flange, thread or other connection methods can be used. Temperature monitoring port 19 is used to install remote or local temperature monitoring instruments. There can be multiple monitoring ports, and flange, thread or other connection methods can be used.
[0038] The feed inlet 13 can be connected by flange, thread, or other means;
[0039] The lower cylinder 20 is divided into three sections from top to bottom. Each section of the lower cylinder 20 is provided with temperature monitoring port 2 12, temperature monitoring port 3 15 and temperature monitoring port 4 17 from top to bottom, which are used to install remote or local temperature monitoring instruments. There can be multiple monitoring ports, and flanges, threads and other connection methods can be used.
[0040] The air inlet 19 can be connected by flange, thread or other means; the discharge port 21 can be connected by flange, thread or other means.
[0041] Working principle: During operation, the electric heater is started first to raise the reactor temperature to the required process temperature of 100-450℃.
[0042] Subsequently, process gas is introduced through the inlet 19. After participating in the reaction process in the reactor, the gas is discharged through the outlet 1 at the middle position of the top of the upper head 3.
[0043] At the same time, the reaction raw materials are added from the feed port 13 on the left side of the lower enlarged section 14. The raw materials react in the reactor to generate lithium sulfide, which is then discharged through the discharge port 21 at the bottom of the lower cylinder 20.
[0044] Throughout the process, the pressure and temperature inside the reactor are monitored in real time by remote or local pressure monitoring instruments installed at pressure monitoring ports and remote or local temperature monitoring instruments installed at temperature monitoring ports, ensuring that the reaction proceeds under suitable conditions. The aforementioned remote or local pressure monitoring instruments are installed at pressure monitoring port 1 (2) and pressure monitoring port 2 (8), and the aforementioned remote or local temperature monitoring instruments are installed at temperature monitoring port 1 (9), temperature monitoring port 2 (12), temperature monitoring port 3 (15), and temperature monitoring port 4 (17).
[0045] Specifically, the lithium sulfide reactor has a heating function. Through an electric heater covering the main body of the reactor, the temperature inside the reactor can be raised to 100-450°C, which is required for the lithium sulfide reaction, in a highly efficient and stable manner. This provides continuous and stable heat support for the entire reaction process, ensuring that the reaction proceeds smoothly under suitable temperature conditions.
[0046] In terms of dust control, multiple columnar filters are innovatively installed. These columnar filters are installed inside the upper cylinder 7 and fixed by filter mounting brackets 5, with spring compensation between the brackets and the filter body 6. They can effectively reduce dust entrainment in the outlet gas, greatly reduce the impact of dust on subsequent processes, ensure the cleanliness of the exhaust gas, and avoid dust pollution of the environment.
[0047] From the perspective of optimizing reaction mixing uniformity, the reactor has a relatively long lower cylinder 20 and an enlarged upper cylinder 7. The enlarged lower cylinder 14 not only provides reasonable space for the feed inlet 13, but also promotes full contact and mixing of the reactants and process gases during the reaction. The enlarged upper cylinder 7, combined with the upper end cap 3 and other structures, helps the gas to further separate from the reaction products during its ascent, while also providing more ample space for the reaction, resulting in more uniform gas-solid reaction mixing.
[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A new lithium sulphide reactor comprising an upper cylinder (7), a middle cone (10) and a lower cylinder (20), characterized in that: The bottom of the upper cylinder (7) is provided with a middle cone (10), the bottom of the middle cone (10) is provided with a lower cylinder (20), a flange (11) is arranged between the middle cone (10) and the lower cylinder (20), the top of the upper cylinder (7) is provided with an upper head (3), a cylinder flange (4) is arranged between the upper head (3) and the upper cylinder (7), the inside of the upper cylinder (7) is provided with a filter mounting bracket (5) and a filter body (6), the bottom of the lower cylinder (20) is provided with a lower expansion section (14), the left side of the lower expansion section (14) is provided with a feed inlet (13), the bottom of the lower expansion section (14) is provided with two lower cylinders (20), a flange (18) is arranged between the two lower cylinders (20), a flange (16) is arranged between the lower expansion section (14) and the lower cylinder (20) close to the bottom thereof, and the bottom of the lowermost lower cylinder (20) is provided with a discharge outlet (21).
2. A novel lithium sulphide reactor as claimed in claim 1, wherein: The middle position of the top of the upper head (3) is provided with a gas outlet (1), the right side of the top of the upper head (3) is provided with a pressure monitoring port (2), and the upper head (3) is connected with the upper cylinder (7) through the cylinder flange (4).
3. A novel lithium sulphide reactor as claimed in claim 1, wherein: The filter body (6) is installed in the inside of the upper cylinder (7) through the filter mounting bracket (5), and a spring compensation is arranged between the filter mounting bracket (5) and the filter body (6).
4. A novel lithium sulphide reactor as claimed in claim 1, wherein: The left side of the upper cylinder (7) is provided with a pressure monitoring port (8), and the right side of the upper cylinder (7) is provided with a temperature monitoring port (9).
5. A novel lithium sulphide reactor as claimed in claim 1, wherein: The middle cone (10) is connected with the lower cylinder (20) at the bottom through the flange (11), and the left side of the lower cylinder (20) at the bottom of the middle cone (10) is provided with a temperature monitoring port (12).
6. A novel lithium sulphide reactor as claimed in claim 1, wherein: The left side of the lower expansion section (14) is also provided with a temperature monitoring port (15), and the temperature monitoring port (15) is located below the feed inlet (13).
7. A novel lithium sulphide reactor as claimed in claim 1, wherein: The left side of the first lower cylinder (20) at the bottom of the lower expansion section (14) is provided with a temperature monitoring port (17), and the left side of the second lower cylinder (20) at the bottom of the lower expansion section (14) is provided with an air inlet (19).