A device and method for recycling lithium-containing wastewater

Abstract

The application discloses a kind of lithium-containing wastewater's resource processing device and method, lithium-containing wastewater's resource processing device includes reaction tank, stirring assembly, reaction tank is used to store lithium-containing wastewater, stirring assembly is used to stir and handle lithium-containing wastewater in reaction tank, stirring assembly includes mounting bracket, mounting bracket is rotatably connected with stirring main rod, stirring main rod is provided with several stirring branch rods, first cavity is opened in stirring main rod, second cavity is opened in stirring branch rod, first cavity and second cavity are communicated, first cavity, second cavity can be used to flow heat source, stirring assembly further includes dosing line, dosing line is set on stirring main rod.Compared with prior art, a kind of lithium-containing wastewater's resource processing device of the application is conducive to extracting heavy metal ions in lithium-containing wastewater, reduces the filtration pressure of filter device, thereby reducing the cleaning and maintenance frequency of filter device, reduces the cost of lithium-containing wastewater's resource processing.

Description

Technical Field

[0001] This invention belongs to the field of lithium wastewater treatment technology, specifically relating to a resource-based treatment device and method for lithium-containing wastewater. Background Technology

[0002] High-chlorine lithium-containing wastewater has a relatively high lithium concentration, thus possessing good recovery value. The key to treatment lies in the removal of impurity ions and the separation of lithium and sodium salts. Existing lithium extraction processes typically follow a route of: removal of organic pollutants → nanofiltration membrane removal of calcium and magnesium → special membrane separation and pre-concentration → evaporation and concentration → sodium precipitation and lithium separation → sodium carbonate precipitation of lithium. This process employs a fractional treatment approach to remove impurities from the wastewater, allowing for the enrichment and concentration of effective components.

[0003] High-chlorine lithium-containing wastewater also contains many other heavy metal ions, such as nickel, cobalt, and manganese, which have recycling value. However, the methods described above are insufficient to extract these other heavy metal ions from the wastewater. Furthermore, during pretreatment, the wastewater undergoes filtration and ultrafiltration to remove solid impurities. However, this filtration process also removes other heavy metal ions, hindering the extraction of these ions from the lithium-containing wastewater. It also increases the filtration pressure, requiring more frequent cleaning and maintenance, thus increasing treatment costs. Insufficient cleaning can lead to incomplete filtration, resulting in a concentrated high-chlorine lithium-containing wastewater solution still containing numerous impurities, affecting lithium extraction and hindering the resource recovery of the wastewater.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a resource-based treatment device and method for lithium-containing wastewater, which can solve the problems mentioned in the background art.

[0006] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution:

[0007] A resource recovery device for lithium-containing wastewater includes a reaction tank and a stirring assembly. The reaction tank stores the lithium-containing wastewater, and the stirring assembly stirs the wastewater within the reaction tank. The stirring assembly includes a mounting frame with a stirring main rod rotatably connected to it. Several stirring support rods are mounted on the stirring main rod. A first cavity is formed within the stirring main rod, and a second cavity is formed on each of the stirring support rods. The first and second cavities are connected and can be used to circulate a heat source. The stirring assembly also includes a dosing pipeline mounted on the stirring main rod. A first one-way valve matching the dosing pipeline is mounted on each stirring support rod. Several solid waste collection nets are also mounted at the lower end of each stirring support rod to collect solid precipitates from the lithium-containing wastewater during the stirring process.

[0008] In one or more embodiments of the present invention, the dosing pipeline includes a first connecting assembly for connecting a stirring main rod. The first connecting assembly includes a first connecting portion, and a second connecting portion is rotatably connected to the outside of the first connecting portion. A drug delivery pipe is installed on the second connecting portion, and the other end of the drug delivery pipe is connected to a drug source. A first exchange chamber is formed between the first connecting portion and the second connecting portion. A first connecting pipe is provided inside the stirring main rod, and the first exchange chamber and the first connecting pipe are in communication. A second connecting pipe that matches the first connecting pipe is provided inside the stirring support rod, and the first connecting pipe and the second connecting pipe are in communication. A first one-way valve matches the second connecting pipe.

[0009] In one or more embodiments of the present invention, a first cleaning fluid delivery pipe is installed on the second connecting part, the other end of the first cleaning fluid delivery pipe is connected to a water source, and a second one-way valve is installed on the side wall of the stirring support rod. The second one-way valve is matched with the second connecting pipe. The second one-way valve can spray the fluid in the second connecting pipe into the inner wall of the reaction tank in a fan shape to achieve cleaning of the inner wall of the reaction tank.

[0010] In one or more embodiments of the present invention, one end of the stirring rod is connected to a fluid pipeline for conveying fluid. The fluid pipeline includes a second connecting assembly, which includes a third connecting portion. The third connecting portion is fixedly connected to the stirring support rod. A fourth connecting portion and a fifth connecting portion are rotatably connected to the third connecting portion. The fourth connecting portion and the fifth connecting portion are arranged vertically on the third connecting portion, forming a second exchange chamber between the fourth connecting portion and the third connecting portion, and a third exchange chamber between the fifth connecting portion and the third connecting portion. Both the second and third exchange chambers communicate with a first cavity. A hot gas input branch pipe is provided on the inner wall of the first cavity. One end of the hot gas input branch pipe is close to the bottom of the stirring rod, and the other end is connected to the second exchange chamber. One end of the fourth connecting portion is connected to a hot gas input main pipe, and the other end of the hot gas input main pipe is connected to a heat source. A first hot gas output pipe is installed on the fifth connecting portion for discharging the heat-exchanged fluid.

[0011] In one or more embodiments of the present invention, a transport assembly is included for moving a stirring assembly into another reaction vessel. The transport assembly includes a transverse connecting rod, a sliding member is slidably connected along the direction of the transverse connecting rod, and a vertical connecting rod is provided on the sliding member. One end of the vertical connecting rod is detachably connected to the stirring assembly.

[0012] In one or more embodiments of the present invention, a feed pipe is installed on the reaction vessel for conveying lithium-containing wastewater into the reaction vessel. A discharge pipe is installed at the end of the discharge pipe away from the reaction vessel. A main discharge pipe is fixedly connected to the end of the discharge pipe away from the reaction vessel. A secondary treatment component is connected to the end of the main discharge pipe away from the reaction vessel. The secondary treatment component is used to filter solid precipitates to achieve solid-liquid separation and to clean up the solid precipitates.

[0013] In one or more embodiments of the present invention, the secondary processing component includes a housing, a collection cylinder is provided at the upper end of the housing, the collection cylinder is matched with a stirring component, the stirring component can be placed in the collection cylinder, a filter chamber is also provided on one side of the housing located in the collection cylinder, the discharge main pipe is connected to the filter chamber, a V-shaped filter plate is fixedly connected to the side wall of the filter chamber, the V-shaped filter plate is used to filter solid precipitates discharged from the discharge main pipe, an arc-shaped plate is provided at the upper end of the filter chamber located in the V-shaped filter plate, through holes are provided on both sides of the arc-shaped plate, a connecting hole is provided between the collection cylinder and the filter chamber, the connecting hole is located at the upper end of the V-shaped filter plate.

[0014] In one or more embodiments of the present invention, a second cleaning fluid delivery pipe is also installed on the side wall of the filter chamber. The other end of the second cleaning fluid delivery pipe is connected to a water source. An alkaline solution delivery pipe is provided on the second cleaning fluid delivery pipe. The other end of the alkaline solution delivery pipe is connected to a cleaning agent source. The water source and the cleaning agent source can be mixed and diluted in the second cleaning fluid delivery pipe to form a mixed solution. A plurality of cleaning fluid delivery branch pipes are provided at one end of the second cleaning fluid delivery pipe located in the filter chamber. A nozzle is provided on the cleaning fluid delivery branch pipe. The nozzle sprays the mixed solution onto the solid precipitate on the V-shaped filter plate to achieve cleaning of the solid precipitate. A liquid output pipe for discharging the liquid located at the lower end of the V-shaped filter plate is also provided at one end of the filter chamber.

[0015] In one or more embodiments of the present invention, a groove is provided at the lower end of the housing, and a solid waste conveying pipe is provided between the filter chamber and the groove. The solid waste conveying pipe is used to discharge solid precipitates on the V-shaped filter plate into the groove. A collection assembly is detachably installed in the groove. The collection assembly is used to load the solid precipitates discharged by the solid waste conveying pipe. The collection assembly has a third cavity. A connecting valve matching the third cavity is installed at one end of the collection assembly. A hot gas input pipe and a second hot gas output pipe matching the connecting valve are installed on the side wall of the groove. The hot gas input pipe is used to convey hot fluid into the third cavity, and the second hot gas output pipe is used to output the hot fluid from the third cavity. A drain hole is provided on the bottom wall of the collection assembly, and a sealing cap matching the drain hole is installed on the collection assembly.

[0016] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution:

[0017] A method for resource recovery treatment of lithium-containing wastewater includes the following steps:

[0018] S1. Pretreatment of lithium-containing wastewater:

[0019] A reagent is added to the lithium-containing wastewater, and the mixture is stirred and heated to allow the reagent to react with the lithium-containing wastewater. After a solid precipitate is formed in the lithium-containing wastewater, the solid precipitate is removed.

[0020] S2. Treatment of solid precipitates:

[0021] The solid precipitate is cleaned with alkaline solution to remove the lithium-containing wastewater from the solid precipitate, and then the solid precipitate is dried.

[0022] The wastewater generated from washing the solid precipitate is the first neutralization solution;

[0023] S3. Adjust the pH value of lithium-containing wastewater:

[0024] The pH value of the lithium-containing wastewater is detected, and acid or alkali is added to the lithium-containing wastewater according to the water quality to adjust the pH value of the lithium-containing wastewater.

[0025] When it is necessary to use alkaline solution to adjust the pH value, the first neutralizing solution should be used first to adjust the pH value of lithium-containing wastewater.

[0026] S4. Filtering lithium-containing wastewater:

[0027] Filtration reduces the impact of suspended solids, impurities, and colloidal droplets in raw water on subsequent processes.

[0028] S5, MVR evaporation and concentration:

[0029] The lithium-containing wastewater is concentrated by MVR evaporation to obtain concentrated liquid and steam. The steam can be used for lithium-containing wastewater pretreatment in step S1 and solid precipitate treatment in step S2. The temperature of the steam is reduced by lithium-containing wastewater pretreatment in step S1 and solid precipitate treatment in step S2. The steam with reduced temperature is condensed to obtain fresh water.

[0030] S6. Subsequent steps:

[0031] Lithium-rich mother liquor and sodium chloride were obtained.

[0032] Compared with the prior art, the resource recovery treatment device for lithium-containing wastewater of the present invention is beneficial for extracting heavy metal ions from lithium-containing wastewater, reducing the filtration pressure of the filtration device, thereby reducing the number of times the filtration device needs to be cleaned and maintained, and reducing the cost of resource recovery treatment of lithium-containing wastewater.

[0033] By combining the reaction vessel and the stirring assembly, solid precipitates can be formed before the lithium-containing wastewater is filtered. These precipitates can then be removed, reducing the filtration pressure on subsequent processes. The stirring assembly uses steam generated by the MVR system to heat the lithium-containing wastewater, making efficient use of heat and saving energy. The transport assembly allows the stirring assembly to be used with different reaction vessels, improving its utilization rate and reducing the cost of arranging it.

[0034] By setting up a secondary treatment component, solid precipitates can be treated to achieve solid-liquid separation and cleaning. The wastewater generated after cleaning can be used to adjust the pH value of lithium-containing wastewater, saving the cost of cleaning solid precipitates. By setting up a collection component, solid precipitates can be dried, and the heat of the steam generated by the MVR system can also play an energy-saving and environmental protection role.

[0035] The present invention provides a resource-based treatment method for lithium-containing wastewater. By utilizing the steam generated by the MVR system to pretreat the lithium-containing wastewater and treat solid precipitates, the energy consumption of the pretreatment and solid precipitate treatment is reduced. At the same time, the pressure of the condensing steam is reduced, and the wastewater generated from cleaning the solid precipitates can also be used to adjust the pH value of the lithium-containing wastewater. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of a resource recovery device for lithium-containing wastewater according to an embodiment of the present invention. Figure 1 ;

[0038] Figure 2 This is a schematic diagram of the structure of a resource recovery device for lithium-containing wastewater according to an embodiment of the present invention. Figure 2 ;

[0039] Figure 3 This is a schematic diagram of the structure of a reaction vessel in one embodiment of the present invention;

[0040] Figure 4 This is a partial structural schematic diagram of a lithium-containing wastewater resource recovery device according to an embodiment of the present invention;

[0041] Figure 5 This is a partial cross-sectional view of a lithium-containing wastewater resource recovery device according to an embodiment of the present invention;

[0042] Figure 6 for Figure 5 Schematic diagram of the structure at point A in the middle;

[0043] Figure 7 for Figure 5 Schematic diagram of the structure at point B;

[0044] Figure 8 This is a partial structural schematic diagram of the stirring assembly in one embodiment of the present invention;

[0045] Figure 9 for Figure 8 Schematic diagram of the structure at point C;

[0046] Figure 10 This is a cross-sectional view of a secondary processing component in one embodiment of the present invention. Figure 1 ;

[0047] Figure 11 This is a cross-sectional view of a secondary processing component in one embodiment of the present invention. Figure 2 ;

[0048] Figure 12 This is a flowchart of a method for resource recovery treatment of lithium-containing wastewater according to an embodiment of the present invention.

[0049] Explanation of key figure labels:

[0050] 1. Reaction vessel; 101. Feed pipe; 102. Discharge pipe; 2. Main discharge pipe; 3. Stirring assembly; 301. Mounting frame; 302. Motor; 303. Stirring rod; 3031. First chamber; 304. Stirring support rod; 3041. Second chamber; 305. Solid waste collection net; 306. L-shaped connecting frame; 4. First connecting assembly; 401. First connecting part; 402. Second connecting part; 5. Second connecting assembly; 501. Third connecting part; 502. Fourth connecting part; 503. Fifth connecting part; 6. First connecting pipe; 7. Reagent delivery pipe; 8. First cleaning fluid delivery pipe; 9. Main hot gas input pipe; 10. Branch hot gas input pipe; 11. First hot gas output pipe; 12. Second connecting pipe; 13. First check valve; 14. Second check valve; 5. Transport assembly; 1501. Horizontal connecting rod; 1502. Sliding part; 1503. Vertical connecting rod; 16. Secondary treatment assembly; 1601. Housing; 16011. Collection cylinder; 16012. Filter chamber; 16013. Connecting hole; 16014. Groove; 1602. Arc plate; 16021. Through hole; 1603. V-shaped filter plate; 17. Alkali solution conveying pipe; 18. Second cleaning fluid conveying pipe; 19. Cleaning fluid conveying branch pipe; 1901. Sprayer head; 20. Collection assembly; 2001. Third chamber; 2002. Handle; 2003. Drain hole; 2004. Connecting valve; 21. Sealing cover; 22. Hot gas input pipe; 23. Second hot gas output pipe; 24. Solid waste conveying pipe; 2401. Spray head; 25. Liquid output pipe. Detailed Implementation

[0051] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0052] like Figures 1-3As shown, an embodiment of the present invention provides a resource recovery treatment device for lithium-containing wastewater, comprising a reaction tank 1 for storing lithium-containing wastewater. The reaction tank 1 is equipped with an inlet pipe 101 and an outlet pipe 102. The inlet pipe 101 is used to transport the lithium-containing wastewater into the reaction tank 1, and the outlet pipe 102 is used to discharge the lithium-containing wastewater.

[0053] like Figures 1-2 As shown, the reaction tank 1 is equipped with a stirring assembly 3, which is used to stir the lithium-containing wastewater in the reaction tank 1. During the stirring process, reagents are added to the lithium-containing wastewater to cause heavy metal ions such as nickel, cobalt, and manganese to form solid precipitates. This step helps to reduce the heavy metal content in the lithium-containing wastewater, laying the foundation for subsequent treatment.

[0054] Specifically, such as Figures 1-9 As shown, the stirring assembly 3 includes a mounting frame 301, on which a stirring main rod 303 is rotatably connected. A motor 302 is rotatably fixedly connected to one side of the mounting frame 301. A belt (not shown) is installed between the output shaft of the motor 302 and the mounting frame 301, meaning the stirring main rod 303 is driven to rotate by the motor 302. Several stirring support rods 304 are also provided on the stirring main rod 303. When the stirring main rod 303 rotates, it simultaneously drives the stirring support rods 304 to rotate in the same direction, thereby achieving stirring of the lithium-containing wastewater. A dosing pipeline is provided on the stirring main rod 303, and a first one-way valve 13 matching the dosing pipeline is installed inside the stirring support rod 304. The reagent flows out from the first one-way valve 13 into the lithium-containing wastewater. The dosing pipeline can add reagents during the stirring process of the stirring main rod 303 and stirring support rods 304, allowing the reagent to react rapidly with the lithium-containing wastewater. Since the depth of the reaction vessel 1 is matched with the stirring main rod 303 and the stirring support rod 304, the stirring support rod 304 can be set at equal intervals on the stirring main rod 303. During the dosing process, the reagent can be mixed evenly and fully with the lithium-containing wastewater, reducing the reaction time between the reagent and the lithium-containing wastewater and improving the reaction efficiency between the reagent and the lithium-containing wastewater.

[0055] like Figures 1-9 As shown, during the dosing and stirring process, solid precipitates form in the lithium-containing wastewater. Several solid waste collection nets 305 are installed on the stirring rod 304. These nets are mesh-like and collect the solid precipitates formed in the lithium wastewater during stirring. Removing the solid precipitates during stirring significantly reduces the pressure on the subsequent filtration devices, thereby reducing the frequency of cleaning and maintenance, minimizing clogging caused by solid precipitates, increasing the utilization rate of the filtration devices, and reducing the cost of cleaning and maintaining them. The solid precipitates collected by the solid waste collection nets 305 can be treated uniformly after the dosing and stirring processes are completed.

[0056] like Figures 5-9 As shown, the dosing pipeline includes a first connecting assembly 4, which includes a first connecting part 401. A second connecting part 402 is rotatably connected to the outside of the first connecting part 401. A drug delivery pipe 7 is installed on the second connecting part 402, and the other end of the drug delivery pipe 7 is connected to a drug source. A first exchange chamber is formed between the first connecting part 401 and the second connecting part 402. A first connecting pipe 6 is provided inside the stirring main rod 303, and the first exchange chamber and the first connecting pipe 6 are in communication. A second connecting pipe 12 that matches the first connecting pipe 6 is provided inside the stirring support rod 304, and the first connecting pipe 6 and the second connecting pipe 12 are in communication. A first one-way valve 13 matches the second connecting pipe 12. The agent enters the first exchange chamber from the agent delivery pipe 7. The first exchange chamber delivers the agent to the first connecting pipe 6, and the first connecting pipe 6 delivers the agent to the second connecting pipe 12. The agent in the second connecting pipe 12 is output to the lithium-containing wastewater through the first one-way valve 13. This allows the agent to be added during the stirring process and to be evenly distributed to the lithium-containing wastewater, so that the heavy metal ions in the lithium-containing wastewater can quickly contact the agent and form solid precipitates.

[0057] like Figures 1-6 As shown, a first cleaning fluid delivery pipe 8 is installed on the second connecting part 402. The other end of the first cleaning fluid delivery pipe 8 is connected to a water source, and the first cleaning fluid delivery pipe 8 is connected to the first exchange chamber. A second one-way valve 14 is installed on the side wall of the stirring rod 304. The second one-way valve 14 is matched with the second connecting pipe 12. The second one-way valve 14 can spray the fluid in the second connecting pipe 12 in a fan shape to the inner wall of the reaction tank 1, thereby cleaning the inner wall of the reaction tank 1. With the rotation of the stirring rod 304, the fan-shaped liquid sprayed by the second one-way valve 14 forms a certain angle with the inner wall of the reaction tank 1, and plays a role in cleaning the inner wall of the reaction tank 1 during the rotation.

[0058] Specifically, the other end of the first cleaning fluid delivery pipe 8 is connected to water sourced from a freshwater tank that has undergone treatment and is stored there. The pH value of this water meets the process requirements. The treated water is used to clean the inner wall of the reaction tank 1. The wastewater generated after cleaning does not need to be discharged and can be stored directly inside the reaction tank 1. Then, lithium-containing wastewater is added to the reaction tank 1 through the feed pipe 101. The mixing of the lithium-containing wastewater and the wastewater generated from cleaning the reaction tank 1 adjusts the pH value of the lithium-containing wastewater, neutralizing it and reducing the need for hydrochloric acid or alkali solutions to adjust the pH, thus reducing the cost of treating the lithium-containing wastewater.

[0059] like Figures 1-9As shown, a first cavity 3031 is provided inside the stirring main rod 303, and a second cavity 3041 is provided inside the stirring support rod 304. The first cavity 3031 and the second cavity 3041 are connected and can be used to circulate a heat source. The heat source heats the lithium-containing wastewater through the stirring main rod 303 and the stirring support rod 304, thereby improving the reaction efficiency of the lithium-containing wastewater and the reagent and reducing the time consumed in mixing the reagent and the lithium-containing wastewater.

[0060] Specifically, such as Figures 5-9 As shown, one end of the stirring rod 303 is connected to a fluid pipeline for transporting fluid. The fluid pipeline includes a second connecting assembly 5, which includes a third connecting part 501. The third connecting part 501 is fixedly connected to the stirring support rod 304. A fourth connecting part 502 and a fifth connecting part 503 are rotatably connected to the third connecting part 501. The fourth connecting part 502 and the fifth connecting part 503 are arranged vertically on the third connecting part 501, forming a second exchange chamber between the fourth connecting part 502 and the third connecting part 501, and a third exchange chamber between the fifth connecting part 503 and the third connecting part 501. Both the second and third exchange chambers communicate with the first cavity 3031. A hot gas input branch pipe 10 is provided on the inner wall of the first cavity 3031. One end of the hot gas input branch pipe 10 is close to the bottom of the stirring rod 303, and the other end is connected to the second exchange chamber. The hot gas input branch pipe 10 can change the position of the heat source inlet and outlet, thereby preventing the heat source from being extracted as soon as it enters. One end of the fourth connection part 502 is connected to a hot gas inlet pipe 9, and the other end of the hot gas inlet pipe 9 is connected to a heat source. A first hot gas outlet pipe 11 is installed on the fifth connection part 503. The first hot gas outlet pipe 11 is used to discharge the heat source after heat exchange. That is, the heat source enters the bottom of the first cavity 3031 from the inside of the hot gas inlet pipe 9, and then diffuses from the bottom of the first cavity 3031 into the second cavity 3041. After exchanging heat with the lithium-containing wastewater, it is discharged from the first cavity 3031 through the second exchange cavity and the first hot gas outlet pipe 11.

[0061] Preferably, the hot gas input branch pipe 10 is provided with a plurality of evenly distributed heat dissipation holes along its setting direction. When the heat source passes through the hot gas input branch pipe 10, the heat dissipation holes can evenly distribute the heat source in the first cavity 3031. Of course, the hot gas input branch pipe 10 can also extend into the second cavity 3041 to realize the delivery of the heat source.

[0062] The heat source connected to one end of the hot gas input main pipe 9 is steam generated by the evaporation of the MVR system. Before condensation, the steam enters the first chamber 3031, undergoes heat exchange, and is then discharged from the first chamber 3031. After condensation, fresh water is obtained. By utilizing the steam generated by the MVR system to heat the first chamber 3031 and the second chamber 3041, the lithium-containing wastewater is heated. By utilizing the heat from the steam generated by the MVR system, unwanted heat is utilized, significantly reducing the cost of heating the lithium-containing wastewater during the stirring process of the stirring component 3. While utilizing the heat from the steam generated by the MVR system, the heat generated by the steam itself is reduced, thus reducing the energy required for condensing the steam and lowering the cost of using the MVR system, resulting in energy conservation and environmental protection.

[0063] Preferably, the MVR system also generates a lot of unnecessary heat during use. A heat absorption device that matches the MVR system can be set up to absorb the excessive heat generated by the MVR system and transfer the absorbed heat to the fluid pipeline to heat the stirring rod 303 and stirring support rod 304. This can cool down the MVR system without affecting its use.

[0064] like Figures 1-2 As shown, after the lithium-containing wastewater in reaction tank 1 is stirred, it needs to undergo a certain degree of sedimentation to ensure complete reaction between the reagent and the wastewater. During the sedimentation process, the stirring component 3 is idle. Due to the setup of fluid pipelines and dosing pipelines, if the stirring component 3 is idle, the cost of these pipelines is disproportionate to the achieved results. To solve this problem, a transport component 15 is installed at the upper end of the stirring component 3. This transport component 15 allows the stirring component 3 to be used with multiple reaction tanks 1. When one reaction tank 1 needs sedimentation, the stirring component 3 can be moved to another reaction tank 1 via the transport component 15 to treat the lithium-containing wastewater. This significantly increases the utilization rate of the stirring component 3, and one stirring component 3 can be used with multiple reaction tanks 1, reducing the cost of setting up fluid pipelines and dosing pipelines. When a portion of the solid precipitate is collected by the solid waste collection net 305 and enters another reaction tank 1, the collected solid precipitate will also contain reagent residues. Moreover, the reagent content in the solid precipitate is higher than that in the lithium-containing wastewater. The residual reagent reacts with the lithium-containing wastewater in the other reaction tank 1, which can reduce the amount of reagent used, save on the cost of removing heavy metal ions from lithium-containing wastewater, and further realize the resource utilization of lithium-containing wastewater. Using the reagents on the solid precipitate in the other reaction tank 1 can also reduce the reagent content on the solid precipitate.

[0065] like Figures 1-4As shown, the transport component 15 includes a horizontal connecting rod 1501, a sliding member 1502 slidably connected along the direction of the horizontal connecting rod 1501, a vertical connecting rod 1503 provided on the sliding member 1502, the vertical connecting rod 1503 moving vertically, and one end of the vertical connecting rod 1503 being detachably connected to the stirring component 3. Specifically, it can be a magnetic attraction, bolt fixing connection, or other detachable connection methods. An L-shaped connecting frame 306 is fixedly connected to the upper end of the mounting frame 301, and the L-shaped connecting frame 306 is detachably connected to one end of the vertical connecting rod 1503.

[0066] like Figures 1 to 11 As shown, the end of the discharge pipe 102 away from the reaction tank 1 is fixedly connected to the discharge main pipe 2, and the end of the discharge main pipe 2 away from the reaction tank 1 is connected to the secondary treatment component 16. The secondary treatment component 16 is used to filter the solid precipitate to achieve solid-liquid separation, and can also clean the solid precipitate, cleaning away the residual lithium-containing wastewater and reagents on the solid precipitate, which is more conducive to the subsequent resource utilization treatment of the solid precipitate.

[0067] Specifically, such as Figures 10-11 As shown, the secondary processing component 16 includes a housing 1601, with a collection cylinder 16011 at the upper end of the housing 1601. The collection cylinder 16011 is matched with the stirring component 3, and the stirring component 3 can be placed in the collection cylinder 16011. The depth and inner diameter of the collection cylinder 16011 are the same as the depth and outer diameter of the reaction vessel 1. Of course, the depth of the collection cylinder 16011 can be greater than the depth of the reaction vessel 1, and the inner diameter of the collection cylinder 16011 can also be greater than the inner diameter of the reaction vessel 1, as long as the stirring main rod 303 and the stirring support rod 304 can be placed in the collection cylinder 16011. When the stirring rod 303 and the stirring support rod 304 are placed inside the collection cylinder 16011, the stirring rod 303 rotates inside the collection cylinder 16011 in the opposite direction to its rotation inside the reaction tank 1. This counter-rotation of the stirring rod 303 causes the solid precipitate located in the solid waste collection net 305 to be subjected to a force in the opposite direction. Simultaneously, the solid waste collection net 305 deforms, causing the solid precipitate to be discharged from the solid waste collection net 305 and fall into the collection cylinder 16011. The collection cylinder 16011 collects the solid precipitate, which then awaits further processing.

[0068] like Figures 10-11As shown, a filter chamber 16012 is also provided on one side of the collection cylinder 16011 in the shell 1601, and the discharge main pipe 2 is connected to the filter chamber 16012. A V-shaped filter plate 1603 is fixedly connected to the side wall of the filter chamber 16012. The V-shaped filter plate 1603 is used to filter the solid precipitate discharged from the discharge main pipe 2 to achieve solid-liquid separation. The filtration accuracy of the V-shaped filter plate 1603 is about 10-100μm. A liquid output pipe 25 matching the filter chamber 16012 is installed on the shell 1601. The liquid after solid-liquid separation is discharged into a water tank through the liquid output pipe 25. The waste liquid in the water tank waits to neutralize the pH value before proceeding to the next process step.

[0069] To reduce the impact force of the waste liquid discharged from the main discharge pipe 2 on the V-shaped filter plate 1603, thus preventing damage to the V-shaped filter plate 1603, such as... Figure 10 As shown, an arc-shaped plate 1602 is installed on the side wall of the filter chamber 16012. The arc-shaped plate 1602 is installed on the upper end of the V-shaped filter plate 1603. The arc-shaped plate 1602 has an upwardly convex arc-shaped structure. When the waste liquid enters the filter chamber 16012, it first contacts the arc-shaped plate 1602. The arc-shaped plate 1602 reduces most of the impact force, minimizing the possibility of damage to the V-shaped filter plate 1603 due to the impact force of the waste liquid. Through holes 16021 are provided on both sides of the arc-shaped plate 1602, and the waste liquid flows from the through holes 16021 onto the V-shaped filter plate 1603.

[0070] like Figure 10 As shown, a connecting hole 16013 is provided between the collection cylinder 16011 and the filter chamber 16012, and the connecting hole 16013 is located at the upper end of the V-shaped filter plate 1603. The solid sediment in the collection cylinder 16011 can enter the filter chamber 16012 through the connecting hole 16013, and can be further filtered by the V-shaped filter plate 1603.

[0071] like Figures 10-11As shown, a second cleaning fluid delivery pipe 18 is also installed on the side wall of the filter chamber 16012. The other end of the second cleaning fluid delivery pipe 18 is connected to a water source, which is also fresh water produced after the resource treatment of lithium-containing wastewater. An alkali delivery pipe 17 is also installed on the second cleaning fluid delivery pipe 18. The other end of the alkali delivery pipe 17 is connected to a cleaning agent source, specifically alkali solution. The water source and the cleaning agent source can be mixed in the second cleaning fluid delivery pipe 18 to form a mixed solution. The concentration of the mixed solution for cleaning solid precipitates can be changed as needed, i.e., the flow rate of water in the second cleaning fluid delivery pipe 18 or the flow rate of cleaning agent in the alkali delivery pipe 17 can be changed. Using the fresh water produced by the process can save costs, and the pH value of the fresh water meets the process requirements. When using it to clean solid precipitates, it is not easy to cause the pH value of the solid precipitates to exceed the standard. The combination of cleaning agent and fresh water can further improve the cleaning effect. The ratio of cleaning agent to fresh water can be changed according to the cleaning needs, so that the cleaning of solid precipitates can be cost-effective and have a good cleaning effect.

[0072] Since the cleaning solution used to remove solid precipitates is an alkaline solution, it is mixed with the fresh water obtained from the process. During cleaning, the used solution is temporarily stored in filter chamber 16012. After cleaning, the solution is collectively discharged to a storage container for storage. When the pH value of lithium-containing wastewater needs to be adjusted using alkali, the solution can be used for adjustment. In other words, the alkaline solution can both adjust the pH value and clean the solid precipitates. Therefore, adding the step of cleaning solid precipitates to the existing technology does not increase the operating cost.

[0073] like Figure 10 As shown, the second cleaning fluid delivery pipe 18, located within the filter chamber 16012, has multiple cleaning fluid delivery branch pipes 19 at one end. Each cleaning fluid delivery branch pipe 19 is equipped with a nozzle 1901, which sprays the mixed solution onto the solid precipitate on the V-shaped filter plate 1603, thus cleaning the solid precipitate. The cleaned mixed solution then passes through the V-shaped filter plate 1603, achieving solid-liquid separation from the solid precipitate and ensuring the solid precipitate remains as dry as possible, facilitating its drying process.

[0074] like Figures 10-11As shown, a groove 16014 is formed at the lower end of the housing 1601. A solid waste conveying pipe 24 is arranged between the filter chamber 16012 and the groove 16014. The solid waste conveying pipe 24 is used to discharge solid sediment on the V-shaped filter plate 1603 into the groove 16014. Multiple spray heads 2401 are arranged in the solid waste conveying pipe 24 within the groove 16014, which can convey the solid sediment into the groove 16014 relatively evenly. A detachable collection assembly 20 is installed in the groove 16014. The collection assembly 20 is used to collect the solid sediment discharged from the solid waste conveying pipe 24. The collection assembly 20 and the groove 16014 are interference-fitted, forming a sealed space. The exhaust gas generated by the solid sediment during filtration is not easily discharged from the connection between the collection assembly 20 and the groove 16014. Of course, a fresh air system can also be installed in the groove 16014 to treat and discharge the exhaust gas.

[0075] Specifically, the collection assembly 20 has a third chamber 2001. One end of the collection assembly 20 is equipped with two connecting valves 2004 that match the third chamber 2001. A hot gas inlet pipe 22 and a second hot gas outlet pipe 23, matching the connecting valves 2004, are installed on the side wall of the groove 16014. The hot gas inlet pipe 22 is used to supply hot fluid into the third chamber 2001, and the second hot gas outlet pipe 23 is used to output the hot fluid from the third chamber 2001. That is, the connecting valves 2004 and the hot gas inlet pipes 22 work together to supply hot fluid into the third chamber 2001. The hot fluid exchanges heat with the solid precipitate located on the collection assembly 20, causing the solid precipitate to dry. The other end of the hot gas inlet pipe 22 is used to connect to steam generated by the MVR system. After heat exchange, the steam becomes lower in heat, thereby reducing the energy generated by the MVR system in cooling the steam, achieving energy saving and environmental protection. The second hot gas output pipe 23, in conjunction with the connecting valve 2004, delivers the heat-exchanged steam to the condensation step of the MVR system.

[0076] Furthermore, the hot gas inlet pipe 22, the collection component 20, and the second hot gas outlet pipe 23 form a passage for condensed steam. When the passage between the connecting valve 2004 and the hot gas inlet pipe 22 is disconnected, steam will not enter the hot gas inlet pipe 22, thereby avoiding steam waste.

[0077] like Figures 10-11As shown, the bottom wall of the collecting component 20 has a drain hole 2003, and a sealing cap 21 matching the drain hole 2003 is installed on the collecting component 20. When the collecting component 20 stops heat exchange, some steam will remain in the third chamber 2001. The steam in the third chamber 2001 can be directly discharged through the drain hole 2003. Alternatively, when the collecting component 20 cools to room temperature, the steam in the third chamber 2001 will condense, and the condensate will be discharged through the drain hole 2003. The lower end of the collecting component 20 is also provided with casters (not shown in the figure), which can easily pull out the collecting component 20 for easy processing of the dried solid precipitate. To facilitate the movement of the collecting component 20, a handle 2002 is also provided on one side of the collecting component 20, which can be used to easily pull the collecting component 20.

[0078] When using, such as Figures 1 to 11 As shown, lithium-containing wastewater is first fed into reaction tank 1 through feed pipe 101. The stirring assembly 3 agitates the wastewater in reaction tank 1. Simultaneously, hot steam generated by the MVR system is transported to the first chamber 3031 via a fluid pipeline. The first chamber 3031 then transports the hot steam to the second chamber 3041, achieving simultaneous stirring and heating of the lithium-containing wastewater. After heat exchange, the hot steam is returned to the condensation zone of the MVR system via the fluid pipeline. When the lithium-containing wastewater reaches a certain temperature, a chemical solution is added to it through a dosing pipeline. The chemical solution, located in the dosing pipeline, also exchanges heat with the hot steam in the fluid pipeline, ensuring that the temperature of the chemical solution sprayed into the lithium-containing wastewater is close to, or even the same as, the temperature of the lithium-containing wastewater. This allows the lithium-containing wastewater and the chemical solution to mix and react rapidly. The stirring component 3 continues to stir, causing solid precipitates to form in the lithium-containing wastewater. During the stirring process, the solid waste collection net 305 can collect some of the solid precipitates in the lithium-containing wastewater, reducing the filtration pressure in subsequent processes. The solid waste collection net 305 also further enhances the stirring force and speed as the stirring component 3 rotates. When one reaction tank 1 has completed stirring and mixing and needs to settle, the stirring component 3 is moved to the next reaction tank 1 via the transport component 15, and the above steps are repeated.

[0079] When the solid sediment in the solid waste collection net 305 is full, the stirring component 3 is moved to the collection cylinder 16011 through the second connecting component 5, and the stirring component 3 is rotated in the opposite direction to separate the solid sediment in the solid waste collection net 305 from the solid waste collection net 305 and collect it by the collection cylinder 16011.

[0080] After sedimentation is complete in reaction tank 1, the lithium-containing wastewater is transported to the main discharge pipe 2 via discharge pipe 102. From there, it is transported to the filter chamber 16012 and subjected to solid-liquid separation via V-shaped filter plate 1603. Following solid-liquid separation, the fresh water obtained from the process is transported to the V-shaped filter plate 1603 via the second cleaning solution delivery pipe 18 to clean the solid precipitate. Simultaneously, alkali solution is transported via alkali solution delivery pipe 17, mixing the fresh water and alkali solution to form a mixed solution for more thorough cleaning of the solid precipitate. The cleaned mixed solution is temporarily stored and used when pH adjustment is needed, significantly saving resources and reducing operating costs.

[0081] After cleaning, the solid sediment is transported to the collection assembly 20 via the solid waste conveying pipe 24. In conjunction with the hot air inlet pipe 22, the third chamber 2001, and the second hot air outlet pipe 23, the collection assembly 20 dries the solid sediment. Once the solid sediment on the collection assembly 20 is dry, it can be pulled out using the handle 2002 and the casters, and the solid sediment inside can be removed.

[0082] In actual use, the wastewater treatment line is being started for the first time. The lithium-containing wastewater has not yet entered the MVR system, and the MVR system has not yet generated steam. Therefore, during the stirring process using the stirring component 3, the steam used can be supplemented manually. Alternatively, steam can be omitted; this will only affect the rate of solid precipitate formation during the initial startup of the wastewater treatment line and will not affect the subsequent use of steam generated by the MVR system.

[0083] This invention, through the cooperation of reaction tank 1 and stirring assembly 3, can form solid precipitate before the filtration step of lithium-containing wastewater, and can remove the formed solid precipitate, reducing the filtration pressure of subsequent processes. Furthermore, the stirring assembly 3 uses steam generated by the MVR system, utilizing the excess heat of the steam to heat the lithium-containing wastewater, thus making efficient use of heat and saving energy and protecting the environment. The transport assembly 15 allows the stirring assembly 3 to be used with different reaction tanks 1, improving the utilization rate of the stirring assembly 3 and reducing the cost required for its placement.

[0084] This invention utilizes a secondary treatment component 16 to treat solid precipitates, achieving solid-liquid separation and cleaning the precipitates. The resulting wastewater can be used to adjust the pH value of lithium-containing wastewater, saving on the cost of cleaning solid precipitates. Furthermore, a collection component 20 allows for the drying of the solid precipitates, and the heat from the steam generated by the MVR system contributes to energy conservation and environmental protection.

[0085] like Figure 12As shown, a resource-based treatment method for lithium-containing wastewater in one embodiment of the present invention includes lithium-containing wastewater pretreatment, treatment of solid precipitates, adjustment of the pH value of lithium-containing wastewater, filtration of lithium-containing wastewater, MVR evaporation and concentration, and subsequent steps.

[0086] Specifically, lithium-containing wastewater pretreatment involves adding chemicals to the wastewater, causing the chemicals to react with the wastewater and form solid precipitates, which are then removed. This step reduces the filtration pressure on subsequent filtration stages, thereby reducing the cost of cleaning and maintaining the filtration equipment. Solidifying and precipitating heavy metals in the lithium-containing wastewater also increases the lithium content, resulting in higher lithium purity.

[0087] The treatment of solid precipitates involves using an alkaline solution to clean them, removing the lithium-containing wastewater, and then drying the precipitates. Alkali can quickly and effectively remove the lithium-containing wastewater from the solid precipitates, resulting in purer precipitates that are easier to process for resource recovery. The wastewater generated from cleaning the solid precipitates is the first neutralization solution, which is used to adjust the pH value of the lithium-containing wastewater.

[0088] To adjust the pH of lithium-containing wastewater, the pH value must first be tested. Based on the test results, acid or alkali is added to the wastewater to adjust the pH. When alkaline solutions are needed to adjust the pH, the first neutralizing solution should be used first. Using the first neutralizing solution allows for the reuse of the alkaline solution used to wash away solid precipitates, reducing process costs and promoting energy conservation and environmental protection.

[0089] Filtration of lithium-containing wastewater reduces the impact of suspended solids, impurities, and colloidal droplets on subsequent processes by reducing the amount of these impurities in the raw water.

[0090] MVR (Medium-Vacuum Reduction) evaporation concentration involves evaporating and concentrating lithium-containing wastewater through an MVR system to obtain concentrated liquid and steam. The steam can be used for pretreatment of lithium-containing wastewater and treatment of solid precipitates. The pretreatment of lithium-containing wastewater and treatment of solid precipitates lowers the steam temperature. The cooled steam is then condensed to obtain fresh water. Utilizing excess heat from the steam reduces the pressure on the condensing steam, while also saving on process operating costs, making it energy-efficient and environmentally friendly.

[0091] In subsequent steps, once the sodium chloride concentration in the MVR system reaches the discharge concentration, the liquid is transferred to a thickening system for concentration, yielding lithium-rich mother liquor and sodium chloride. After filtration and centrifugation, solid sodium chloride crystalline salt is obtained. The mother liquor after solid removal is then subjected to lithium precipitation to ultimately obtain lithium.

[0092] In this invention, the steam generated by the MVR system is used to pretreat lithium-containing wastewater and treat solid precipitates, thereby reducing the energy consumption of pretreating lithium-containing wastewater and treating solid precipitates. At the same time, it can reduce the pressure of condensing steam, and the wastewater generated from cleaning solid precipitates can also adjust the pH value of lithium-containing wastewater.

[0093] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0094] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A resource recovery device for lithium-containing wastewater, characterized in that, include: A reaction vessel for storing lithium-containing wastewater; A stirring assembly, used for stirring and treating lithium-containing wastewater in a reaction tank; The stirring assembly includes a mounting frame, on which a stirring main rod is rotatably connected, and on which a plurality of stirring support rods are provided; The stirring main rod has a first cavity, and the stirring support rod has a second cavity. The first cavity and the second cavity are connected, and the first cavity and the second cavity are used for the flow of heat source. The stirring assembly also includes a dosing pipeline, which is installed on the main stirring rod, and a first one-way valve matching the dosing pipeline is installed on the stirring support rod; The lower end of the stirring support rod is also equipped with several solid waste collection nets, which are used to collect solid precipitates in lithium-containing wastewater during the stirring process. The dosing pipeline includes a first connecting component, which is used to connect to the stirring rod. The first connecting assembly includes a first connecting part, a second connecting part is rotatably connected to the outside of the first connecting part, a drug delivery pipe is installed on the second connecting part, and the other end of the drug delivery pipe is connected to a drug source; A first exchange chamber is formed between the first connecting part and the second connecting part. A first connecting pipe is provided inside the stirring main rod. The first exchange chamber and the first connecting pipe are connected. A second connecting pipe that matches the first connecting pipe is provided inside the stirring support rod. The first connecting pipe and the second connecting pipe are connected. The first one-way valve matches the second connecting pipe. One end of the stirring rod is connected to a fluid pipeline, which is used to transport fluid. The fluid pipeline includes a second connecting assembly, the second connecting assembly includes a third connecting part, the third connecting part is fixedly connected to the stirring main rod, and a fourth connecting part and a fifth connecting part are rotatably connected to the third connecting part. The fourth connecting part and the fifth connecting part are arranged vertically on the third connecting part, and a second exchange chamber is formed between the fourth connecting part and the third connecting part, and a third exchange chamber is formed between the fifth connecting part and the third connecting part. The second and third exchange chambers are both connected to the first chamber. The inner wall of the first chamber is provided with a hot gas input branch pipe. One end of the hot gas input branch pipe is close to the bottom of the stirring rod, and the other end is connected to the second exchange chamber. One end of the fourth connection is connected to a hot air input pipe, and the other end of the hot air input pipe is connected to a heat source. A first hot gas output pipe is installed on the fifth connection part, and the first hot gas output pipe is used to discharge the fluid after heat exchange. The reaction vessel is equipped with a feed pipe for conveying lithium-containing wastewater into the reaction vessel, and a discharge pipe is installed at the end away from the feed pipe. The discharge pipe is fixedly connected to a main discharge pipe at the end furthest from the reaction tank. The main discharge pipe is connected to a secondary treatment component at the end furthest from the reaction tank. The secondary treatment component is used to filter the solid precipitate, achieve solid-liquid separation, and clean the solid precipitate. The secondary processing component includes a housing, and a collection cylinder is provided at the upper end of the housing. The collection cylinder is matched with the stirring component, and the stirring component can be placed in the collection cylinder. The shell is also provided with a filter chamber on one side of the collecting cylinder, and the discharge main pipe is connected to the filter chamber; A V-shaped filter plate is fixedly connected to the side wall of the filter chamber. The V-shaped filter plate is used to filter the solid sediment discharged from the discharge main pipe. The filter chamber is provided with an arc-shaped plate at the upper end of the V-shaped filter plate, and through holes are provided on both sides of the arc-shaped plate; A connecting hole is provided between the collection cylinder and the filter chamber, and the connecting hole is located at the upper end of the V-shaped filter plate; A second cleaning fluid delivery pipe is also installed on the side wall of the filter chamber. The other end of the second cleaning fluid delivery pipe is connected to a water source. An alkaline solution delivery pipe is installed on the second cleaning fluid delivery pipe. The other end of the alkaline solution delivery pipe is connected to a cleaning agent source. The water source and the cleaning agent source can be mixed and diluted in the second cleaning fluid delivery pipe to form a mixed solution. The second cleaning fluid delivery pipe is located in the filter chamber and has multiple cleaning fluid delivery branch pipes at one end. Each cleaning fluid delivery branch pipe is equipped with a nozzle, which sprays the mixture onto the solid precipitate on the V-shaped filter plate to clean the solid precipitate. One end of the filter chamber is also provided with a liquid output pipe for discharging the liquid located at the lower end of the V-shaped filter plate.

2. The resource recovery treatment device for lithium-containing wastewater according to claim 1, characterized in that, The second connecting part is equipped with a first cleaning fluid delivery pipe, and the other end of the first cleaning fluid delivery pipe is connected to a water source; A second one-way valve is installed on the side wall of the stirring support rod. The second one-way valve is matched with the second connecting pipe. The second one-way valve can spray the fluid in the second connecting pipe into the inner wall of the reaction vessel in a fan shape to achieve cleaning of the inner wall of the reaction vessel.

3. The resource recovery treatment device for lithium-containing wastewater according to claim 1, characterized in that, Includes a transport assembly for moving the stirring assembly into other reaction vessels; The transport component includes a transverse connecting rod, and a sliding member is slidably connected along the direction of the transverse connecting rod. A vertical connecting rod is provided on the sliding member, and one end of the vertical connecting rod is detachably connected to the stirring component.

4. The resource recovery treatment device for lithium-containing wastewater according to claim 1, characterized in that, The lower end of the shell is provided with a groove, and a solid waste conveying pipe is provided between the filter chamber and the groove. The solid waste conveying pipe is used to discharge the solid precipitates on the V-shaped filter plate into the groove. A collection component is detachably installed in the groove, and the collection component is used to load the solid sediment discharged from the solid waste conveying pipe; The collecting assembly has a third cavity, and a connecting valve matching the third cavity is installed at one end of the collecting assembly. A hot gas input pipe and a second hot gas output pipe matching the connecting valve are installed on the side wall of the groove. The hot gas input pipe is used to deliver hot fluid into the third cavity, and the second hot gas output pipe is used to output the hot fluid from the third cavity. The bottom wall of the collection component is provided with a drain hole, and a sealing cap that matches the drain hole is installed on the collection component.

5. A method for resource recovery treatment of lithium-containing wastewater, utilizing the resource recovery treatment apparatus for lithium-containing wastewater as described in any one of claims 1 to 4, characterized in that, Includes the following steps: S1. Pretreatment of lithium-containing wastewater: A reagent is added to the lithium-containing wastewater, and the mixture is stirred and heated to allow the reagent to react with the lithium-containing wastewater. After a solid precipitate is formed in the lithium-containing wastewater, the solid precipitate is removed. S2. Treatment of solid precipitates: The solid precipitate is cleaned with alkaline solution to remove the lithium-containing wastewater from the solid precipitate, and then the solid precipitate is dried. The wastewater generated from washing the solid precipitate is the first neutralization solution; S3. Adjust the pH value of lithium-containing wastewater: The pH value of the lithium-containing wastewater is detected, and acid or alkali is added to the lithium-containing wastewater according to the water quality to adjust the pH value of the lithium-containing wastewater. When it is necessary to use alkaline solution to adjust the pH value, the first neutralizing solution should be used first to adjust the pH value of lithium-containing wastewater. S4. Filtering lithium-containing wastewater: Filtration reduces suspended solids in raw water and minimizes the impact of impurities on subsequent processes. S5, MVR evaporation and concentration: The lithium-containing wastewater is concentrated by MVR evaporation to obtain concentrated liquid and steam. The steam can be used for lithium-containing wastewater pretreatment in step S1 and solid precipitate treatment in step S2. The temperature of the steam is reduced by lithium-containing wastewater pretreatment in step S1 and solid precipitate treatment in step S2. The steam with reduced temperature is condensed to obtain fresh water. S6. Subsequent steps: Lithium-rich mother liquor and sodium chloride were obtained.

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