High-purity lithium carbonate carbonization reaction device for countercurrent mass transfer of pressurized tower plates
The high-purity lithium carbonate carbonation reaction device using pressurized tray countercurrent mass transfer solves the problem of low carbon dioxide utilization in the lithium carbonate carbonation reaction, achieving efficient lithium carbonate conversion and carbon dioxide utilization, improving product purity and reaction stability, and reducing the risk of equipment damage.
Patent Information
- Application Number
- CN202423257813.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-27
AI Technical Summary
The existing lithium carbonate carbonation reaction has low carbon dioxide utilization, long reaction time, and a large amount of unreacted carbon dioxide, which increases the recovery cost and poses a risk of equipment damage.
The high-purity lithium carbonate carbonation reactor adopts a pressurized tray countercurrent mass transfer design. Through the series design of the first and second carbonation towers, the material circulates between the two towers. Combined with buffers and connecting components, it ensures uniform carbon dioxide supply and extended reaction time. Anti-clogging trays and high-efficiency mass transfer jet trays are used to reduce the risk of clogging. An external circulation cooler and pressure relief discharge components are set up to prevent equipment damage.
It improves the conversion rate of lithium carbonate and the utilization rate of carbon dioxide, reduces raw material waste and exhaust emissions, ensures product purity and the stability of reaction conditions, and meets environmental protection requirements.
Smart Images
Figure CN223628589U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lithium carbonate carbonization reaction device technical field, specifically for a kind of high-purity lithium carbonate carbonization reaction device of pressurized tray countercurrent mass transfer. BACKGROUND
[0002] Lithium carbonate and carbon dioxide and water react under certain conditions to generate lithium bicarbonate, and lithium bicarbonate can be obtained after subsequent treatment such as heating decomposition. Lithium hydroxide is an important basic lithium salt, which is widely used in battery, ceramic, glass and other industries. For example, in the production of lithium-ion batteries, lithium hydroxide is one of the key raw materials for preparing high-performance positive electrode materials.
[0003] Most of the existing industrial-grade lithium carbonate is mixed with deionized water to form slurry, which is pumped into the top of the carbonator. The carbonator operates under normal pressure and full liquid. Carbon dioxide gas is introduced from the bottom of the carbonator and bubbled in the liquid phase for mass transfer. The lithium carbonate slurry is slowly carbonated. However, due to the low utilization rate of carbon dioxide, the complete carbonation reaction takes a long time, and the amount of unreacted carbon dioxide directly increases the cost of subsequent carbon dioxide recovery. SUMMARY
[0004] The purpose of the utility model is to provide a kind of high-purity lithium carbonate carbonization reaction device of pressurized tray countercurrent mass transfer to solve the problems raised in the above background.
[0005] To achieve the above purpose, the utility model provides the following technical scheme:
[0006] A kind of high-purity lithium carbonate carbonization reaction device of pressurized tray countercurrent mass transfer, comprising a first carbonization tower and a second carbonization tower, the feed end of the first carbonization tower is communicated with a feed assembly for delivering lithium carbonate slurry to the first carbonization tower, a gas supply assembly is arranged on one side of the first carbonization tower for supplying gas to the first carbonization tower and the second carbonization tower, and a communication pipe is connected to the output end of the first carbonization tower, and a communication assembly for connecting the second carbonization tower is arranged at the other end of the communication pipe.
[0007] The communication assembly includes a circulating pump connected to the output ends of the first carbonization tower and the second carbonization tower, respectively. The output ends of the circulating pumps are respectively connected to coolers. The output ends of the coolers are respectively connected to a one-to-two pipe. One end of the one-to-two pipe near the first carbonization tower is connected to the middle of the first carbonization tower, and the other end is connected to the input end of the second carbonization tower. One end of the one-to-two pipe near the second carbonization tower is connected to the middle of the second carbonization tower, and the other end is connected to a pressure-reducing discharge assembly. The inlet of the two sets of coolers is connected to a water supply pipe, and the outlet of the two sets of coolers is connected to a water return pipe.
[0008] Preferably, the feeding assembly comprises a feeding pump communicated with the upper part of the first carbonization tower, and a lithium carbonate slurry stirring tank is communicated with the input end of the feeding pump.
[0009] Preferably, the gas supply assembly comprises a Dewar flask arranged on one side of the first carbonization tower and used for storing liquid carbon dioxide, and a carbon dioxide gasifier is communicated with the output end of the Dewar flask, and the output end of the carbon dioxide gasifier is communicated with the gas inlets of the first carbonization tower and the second carbonization tower through a buffer.
[0010] Preferably, the buffer comprises a carbon dioxide buffer tank communicated with the output end of the carbon dioxide gasifier, and a branch pipe is communicated with the output end of the carbon dioxide buffer tank, and the two ends of the branch pipe are communicated with the gas inlets of the first carbonization tower and the second carbonization tower, respectively.
[0011] Preferably, the gas outlet end of the first carbonization tower is communicated with a connecting pipe, the other end of the connecting pipe is communicated with the middle part of the second carbonization tower, and the gas outlet end of the second carbonization tower is communicated with a discharge pipe.
[0012] Preferably, the pressure reduction and discharge assembly comprises a carbonized liquid buffer tank communicated with one end of the branch pipe close to the second carbonization tower, a discharge pump is communicated with the output end of the carbonized liquid buffer tank, a through pipe is communicated with the gas outlet end of the carbonized liquid buffer tank, and the through pipe is communicated with the discharge pipe.
[0013] Compared with the prior art, the utility model has the advantages that:
[0014] 1、The first carbonization tower and the second carbonization tower are connected together through the communication assembly, and the communication assembly is used for circulating feeding, so that the material circulates and flows between the two towers, the lithium carbonate and the carbon dioxide have more contact opportunities and reaction time, the conversion rate of the reaction is improved, and the utilization rate of the carbon dioxide is improved.
[0015] 2、The carbon dioxide buffer tank plays a role in buffering pressure between the carbon dioxide gasifier and the first carbonization tower, avoids damage to the equipment caused by unstable output pressure of the carbon dioxide gasifier or too large instantaneous pressure change of the carbonization tower, and helps to make the carbon dioxide gas pressure entering the two towers more balanced, ensures that the carbonization reaction conditions in the two towers are consistent, and improves the uniformity and stability of the product quality.
[0016] 3、The utility model discloses a through the setting of connecting pipe and discharge pipe, the gas outlet of first carbonization tower is communicated with the middle part of second carbonization tower through connecting pipe, so that the gas that is not completely reacted in first carbonization tower can continue to participate in the reaction in second carbonization tower, the utilization rate of carbon dioxide is improved, raw material waste and waste gas emission are reduced, the setting of discharge pipe is convenient for centralized treatment of final waste gas, meets environmental protection requirement, and it is also favorable to the monitoring and management of the gas emission of whole carbonization process.
[0017] 4、Reaction efficiency is high: through the series connection design of double towers, the series connection use of first carbonization tower and second carbonization tower makes material circulate between two towers, increases the contact opportunity and reaction time of lithium carbonate and carbon dioxide. This design not only improves the conversion rate of reaction, but also ensures the sufficiency of reaction, through the setting of anti-blocking tower plate and high-efficiency mass transfer injection tower plate, first carbonization tower adopts anti-blocking tower plate, effectively prevents the plugging problem caused by high solid content, and second carbonization tower adopts high-efficiency mass transfer injection tower plate, improves the gas-liquid reaction residence time, and further improves the carbonation rate of lithium carbonate.
[0018] 5、Carbon dioxide utilization rate is high: after liquid carbon dioxide is gasified through gasifier, is uniformly and stably transported to the bottom of two towers through buffer (carbon dioxide buffer tank and branch pipe), ensures the full use of carbon dioxide, through the design of communication assembly and connecting pipe, realizes the circulation of material and the communication of gas, so that the gas that is not completely reacted can continue to participate in the reaction in second carbonization tower, thereby improving the utilization rate of carbon dioxide.
[0019] 6、Product purity is high: the setting of external circulation cooler effectively takes away the heat in the carbonization process, guarantees the stability of liquid temperature in the tower. At the same time, the setting of pressure reduction discharge assembly (carbonization liquid buffer tank and lead-through pipe) avoids the risk of carbonization liquid leakage or equipment damage caused by too high pressure in the pipeline, ensures the purity of product, since lithium carbonate slurry contains chloride ions, therefore, 316 stainless steel material is selected as the material of first carbonization tower and second carbonization tower, effectively prevents the introduction of impurities caused by material corrosion, and further improves the purity of product. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is the structure schematic view of the utility model discloses a kind of high-purity lithium carbonate carbonization reaction device of pressurized tower plate countercurrent mass transfer.
[0021] In the drawing:
[0022] 100, lithium carbonate slurry stirring tank;101, feed pump;
[0023] 200, first carbonization tower;201, connecting pipe;202, second carbonization tower;203, discharge pipe;204, lead-through pipe;
[0024] 300, connecting pipe; 301, circulating pump; 302, cooler; 303, water supply pipe; 304, backwater pipe; 305, one-to-two pipe;
[0025] 400, carbonization liquid buffer tank; 401, delivery pump;
[0026] 500, carbon dioxide buffer tank; 501, carbon dioxide gasifier; 502, Dewar flask; 503, manifold. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.
[0028] Please refer to Figure 1 The embodiment provides a high-purity lithium carbonate carbonization reaction device of pressurized tower plate countercurrent mass transfer, which comprises a first carbonization tower 200 and a second carbonization tower 202. The first carbonization tower 200 is connected with a feeding assembly for feeding lithium carbonate slurry into the first carbonization tower 200. The first carbonization tower 200 is provided with a gas supply assembly for supplying gas to the first carbonization tower 200 and the second carbonization tower 202. The output end of the first carbonization tower 200 is connected with a connecting pipe 300. The other end of the connecting pipe 300 is provided with a connecting assembly for connecting the second carbonization tower 202.
[0029] The connecting assembly comprises a circulating pump 301 connected with the output ends of the first carbonization tower 200 and the second carbonization tower 202. The output end of the circulating pump 301 is connected with a cooler 302. The output end of the cooler 302 is connected with a one-to-two pipe 305. One end of the one-to-two pipe 305 close to the first carbonization tower 200 is connected with the middle part of the first carbonization tower 200, and the other end is connected with the input end of the second carbonization tower 202. One end of the one-to-two pipe 305 close to the second carbonization tower 202 is connected with the middle part of the second carbonization tower 202, and the other end is connected with a pressure reduction discharge assembly. The liquid inlets of the two coolers 302 are connected with a water supply pipe 303. The liquid outlets of the two coolers 302 are connected with a backwater pipe 304. Through the arrangement of the first carbonization tower 200 and the second carbonization tower 202, the first carbonization tower 200 and the second carbonization tower 202 are connected together through the connecting assembly, and the circulating feeding is carried out through the connecting assembly, so that the material circulates between the two towers, the lithium carbonate and the carbon dioxide have more contact opportunities and reaction time, thereby improving the conversion rate of the reaction and improving the utilization rate of the carbon dioxide.
[0030] The liquid-phase lithium carbonate content in the first carbonation tower 200 is high, and the reaction with carbon dioxide is rapid, but the solid content is relatively high and easy to block, so the tower plate is an anti-blocking tower plate;
[0031] Most of the lithium carbonate in the second carbonation tower 202 has been converted into lithium bicarbonate, and the lithium carbonate content is lower, the reaction with carbon dioxide is slower, but the solid content is relatively small, so the tower plate is a high-efficiency mass transfer jet tower plate, which improves the gas-liquid reaction residence time, increases the carbonation rate of lithium carbonate, and improves the utilization rate of carbon dioxide.
[0032] Further, the feed assembly includes a feed pump 101 connected to the upper part of the first carbonation tower 200, and the input end of the feed pump 101 is connected with a lithium carbonate slurry stirring tank 100. Through the arrangement of the feed assembly, it is ensured that the lithium carbonate slurry can enter the first carbonation tower 200 stably and uniformly.
[0033] Further, the gas supply assembly includes a Dewar flask 502 arranged on one side of the first carbonation tower 200 for storing liquid carbon dioxide, and the output end of the Dewar flask 502 is connected with a carbon dioxide gasifier 501. The output end of the carbon dioxide gasifier 501 is connected with the gas inlet ends of the first carbonation tower 200 and the second carbonation tower 202 through a buffer, respectively. Through the arrangement of the gas supply assembly, the carbon dioxide gasifier 501 converts it into gaseous carbon dioxide and supplies it into the first carbonation tower 200, which is convenient for storing and controlling the supply amount of carbon dioxide.
[0034] Preferably, the buffer includes a carbon dioxide buffer tank 500 connected to the output end of the carbon dioxide gasifier 501, and the output end of the carbon dioxide buffer tank 500 is connected with a manifold 503, and the two ends of the manifold 503 are connected with the gas inlet ends of the first carbonation tower 200 and the second carbonation tower 202, respectively. Through the arrangement of the buffer, the carbon dioxide buffer tank 500 plays a role of buffering pressure between the carbon dioxide gasifier 501 and the first carbonation tower 200, avoiding damage to the equipment caused by unstable output pressure of the carbon dioxide gasifier 501 or too large instantaneous pressure change of the carbonation tower, and also helping to make the carbon dioxide gas pressure entering the two towers more balanced, ensuring that the carbonation reaction conditions in the two towers are consistent, and improving the uniformity and stability of product quality.
[0035] It is worth mentioning that the gas outlet end of the first carbonization tower 200 is communicated with a connecting pipe 201, the other end of the connecting pipe 201 is communicated with the middle part of the second carbonization tower 202, and the gas outlet end of the second carbonization tower 202 is communicated with a discharge pipe 203. Through the arrangement of the connecting pipe 201 and the discharge pipe 203, the gas outlet end of the first carbonization tower 200 is communicated with the middle part of the second carbonization tower 202 through the connecting pipe 201, so that the unreacted gas in the first carbonization tower 200 can continue to participate in the reaction in the second carbonization tower 202, thereby improving the utilization rate of carbon dioxide, reducing the waste of raw materials and waste gas emission, and facilitating the centralized treatment of the final waste gas, meeting the environmental protection requirements, and being conducive to the monitoring and management of the gas emission of the entire carbonization process.
[0036] Further, the pressure reduction and discharge assembly includes a carbonization liquid buffer tank 400 communicated with one end of the one-to-two pipe 305 close to the second carbonization tower 202, the output end of the carbonization liquid buffer tank 400 is communicated with a discharge pump, and the gas outlet end of the carbonization liquid buffer tank 400 is communicated with a guide pipe 204, and the guide pipe 204 is communicated with the discharge pipe 203. Through the arrangement of the carbonization liquid buffer tank 400, the pressure reduction and buffering effects are achieved, the risk of carbonization liquid leakage or equipment damage caused by excessive pressure in the pipeline is avoided, and the carbonization liquid can enter the discharge pump more smoothly, which is conducive to the stable operation of the discharge process.
[0037] Since the lithium carbonate slurry contains chloride ions, the first carbonization tower 200 and the second carbonization tower 202 are made of 316 stainless steel.
[0038] Working principle;
[0039] The lithium carbonate slurry is stirred uniformly in the lithium carbonate slurry stirring tank 100, is sent to the top of the first carbonization tower 200 by the feed pump 101, the liquid carbon dioxide is temporarily stored in the carbon dioxide Dewar flask 502, is gasified after passing through the gasifier, is transported to the carbon dioxide buffer tank, and is sent to the bottoms of the first carbonization tower 200 and the second carbonization tower 202 through the bifurcated pipe 503 at the bottom of the carbon dioxide buffer tank. In the first carbonization tower, the carbon dioxide and the lithium carbonate slurry at the top of the tower are countercurrently contacted and mass transferred on the anti-blocking tray, most of the lithium carbonate is carbonized into lithium bicarbonate in the first carbonization tower, and an external circulation cooler 302 is arranged outside the tower to remove the heat generated during the carbonization process by circulating water to ensure the temperature of the liquid in the tower.
[0040] The slurry after carbonization in the first carbonization tower 200 is sent to the second carbonization tower 202 by the circulating pump 301, the remaining lithium carbonate in the slurry is countercurrently contacted and mass transferred with the carbon dioxide in the tower to complete the carbonization reaction, the outlet liquid is relatively clear lithium bicarbonate slurry and is pumped into the corresponding side cooler 302 by the corresponding side circulating pump 301, is transported to the carbonization liquid buffer tank 400, and is pumped to the outside by the delivery pump 401 communicated with the output end of the carbonization liquid buffer tank 400.
[0041] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.
Claims
1. A high purity lithium carbonate carbonation reactor apparatus with pressurized tray countercurrent mass transfer, characterized by, The first carbonization tower (200) and the second carbonization tower (202) are provided, the feed end of the first carbonization tower (200) is communicated with a feeding assembly for feeding lithium carbonate slurry into the first carbonization tower (200), one side of the first carbonization tower (200) is provided with a gas supply assembly for supplying gas to the first carbonization tower (200) and the second carbonization tower (202), and the output end of the first carbonization tower (200) is communicated with a connecting pipe (300), the other end of the connecting pipe (300) is provided with a connecting assembly for connecting the second carbonization tower (202); The connecting assembly comprises circulating pumps (301) connected to the output ends of the first carbonization tower (200) and the second carbonization tower (202) respectively, the output ends of the circulating pumps (301) are respectively communicated with coolers (302), the output ends of the coolers (302) are respectively communicated with one-to-two pipes (305), one end of the one-to-two pipe (305) close to the first carbonization tower (200) is communicated with the middle part of the first carbonization tower (200) and the other end is communicated with the input end of the second carbonization tower (202), one end of the one-to-two pipe (305) close to the second carbonization tower (202) is communicated with the middle part of the second carbonization tower (202) and the other end is communicated with a pressure reduction discharge assembly, and the liquid inlets of the two sets of coolers (302) are communicated with water supply pipes (303) and the liquid outlets of the two sets of coolers (302) are communicated with return water pipes (304).
2. A high purity lithium carbonate carbonation reaction apparatus with pressurized tray countercurrent mass transfer according to claim 1, characterized in that: The feeding assembly comprises a feeding pump (101) connected to the upper part of the first carbonization tower (200), and the input end of the feeding pump (101) is communicated with a lithium carbonate slurry stirring tank (100).
3. A high purity lithium carbonate carbonation reaction apparatus with pressurized tray countercurrent mass transfer according to claim 1, characterized in that: The gas supply assembly comprises a Dewar flask (502) arranged on one side of the first carbonization tower (200) for storing liquid carbon dioxide, the output end of the Dewar flask (502) is communicated with a carbon dioxide gasifier (501), and the output ends of the carbon dioxide gasifier (501) are respectively communicated with the gas inlets of the first carbonization tower (200) and the second carbonization tower (202) through a buffer.
4. A high purity lithium carbonate carbonation reactor apparatus according to claim 3, wherein: The buffer comprises a carbon dioxide buffer tank (500) connected to the output end of the carbon dioxide gasifier (501), the output end of the carbon dioxide buffer tank (500) is communicated with a diverging pipe (503), and the two ends of the diverging pipe (503) are respectively communicated with the gas inlets of the first carbonization tower (200) and the second carbonization tower (202).
5. A high purity lithium carbonate carbonation reactor apparatus with pressurized tray countercurrent mass transfer according to claim 1, characterized in that: The gas outlet end of the first carbonization tower (200) is communicated with a connecting pipe (201), the other end of the connecting pipe (201) is communicated with the middle part of the second carbonization tower (202), and the gas outlet end of the second carbonization tower (202) is communicated with a discharge pipe (203).
6. A high purity lithium carbonate carbonation reaction apparatus of the pressurized tray countercurrent mass transfer according to claim 5, characterized in that: The pressure reduction discharge assembly comprises a carbonization liquid buffer tank (400) connected to one end of the one-to-two pipe (305) close to the second carbonization tower (202), the output end of the carbonization liquid buffer tank (400) is communicated with a discharge pump, the gas outlet end of the carbonization liquid buffer tank (400) is communicated with a through pipe (204), and the through pipe (204) is communicated with the discharge pipe (203).