Recycling treatment device and method for lithium-containing wastewater

Abstract

The invention discloses a resourceful treatment device and method for lithium-containing wastewater, the resourceful treatment device for the lithium-containing wastewater comprises a reaction tank and a stirring assembly, the reaction tank is used for storing the lithium-containing wastewater, the stirring assembly is used for stirring the lithium-containing wastewater in the reaction tank, the stirring assembly comprises a mounting frame, the mounting frame is rotatably connected with a stirring main rod, and the stirring main rod is rotatably connected with the reaction tank. The stirring assembly comprises a stirring main rod, a plurality of stirring branch rods are arranged on the stirring main rod, a first cavity is formed in the stirring main rod, second cavities are formed in the stirring branch rods, the first cavity is communicated with the second cavities, heat sources can circulate in the first cavity and the second cavities, and the stirring assembly further comprises a medicine adding pipeline which is arranged on the stirring main rod. Compared with the prior art, the resourceful treatment device for the lithium-containing wastewater is beneficial to extracting heavy metal ions in the lithium-containing wastewater and reducing the filtering pressure of the filtering device, so that the cleaning and maintenance times of the filtering device are reduced, and the resourceful treatment cost of the lithium-containing wastewater is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium wastewater treatment, and specifically relates to a resource treatment device and method for lithium-containing wastewater. Background Art

[0002] The lithium concentration of high-chloride lithium-containing wastewater is relatively high, so it has a good recovery value. The key to treatment is the removal of impurity ions and the separation of lithium and sodium salts. The general lithium extraction process in the prior art is generally: removal of organic pollutants → nanofiltration membrane removal of calcium and magnesium → special membrane separation pre-concentration → evaporation concentration → sodium separation and lithium separation → sodium carbonate precipitation of lithium. The process route is to remove impurities in the wastewater by means of quality treatment, and the effective components can be enriched and concentrated.

[0003] There are many other heavy metal ions in high-chlorine lithium-containing wastewater, such as nickel, cobalt, manganese and other metals with recycling value. However, it is difficult to extract some other heavy metal ions in high-chlorine lithium-containing wastewater by the above means. Moreover, during the pretreatment of high-chlorine lithium wastewater, solid impurities in high-chlorine lithium wastewater are discharged by filtering device and ultrafiltration device. However, by filtering solid impurities in high-chlorine lithium wastewater, other heavy metal ions in high-chlorine lithium wastewater will also be filtered, which is not conducive to the extraction of heavy metal ions in lithium-containing wastewater. The filtering pressure of the filtering device will also be increased, thereby increasing the cleaning and maintenance times of the filtering device, increasing the treatment cost of high-chlorine lithium-containing wastewater. If the filtering device is not cleaned in time, it is also easy to cause incomplete filtration, resulting in the situation that the high-chlorine lithium-containing wastewater concentrate obtained still contains many impurities, affecting the extraction of lithium, which is not conducive to the resource treatment of lithium-containing wastewater.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a device and method for resource recovery treatment of lithium-containing wastewater, which can solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0007] A resource processing device for lithium-containing wastewater comprises a reaction tank and a stirring component, wherein the reaction tank is used to store lithium-containing wastewater, and the stirring component is used to stir the lithium-containing wastewater in the reaction tank. The stirring component comprises a mounting frame, and a stirring main rod is rotatably connected to the mounting frame, and a plurality of stirring support rods are arranged on the stirring main rod. A first cavity is defined in the stirring main rod, and a second cavity is defined on the stirring support rod. The first cavity and the second cavity are communicated with each other, and a heat source can be circulated in the first cavity and the second cavity. The stirring component also comprises a dosing pipeline, and the dosing pipeline is arranged on the stirring main rod. A first one-way valve matching the dosing pipeline is arranged on the stirring support rod. A plurality of solid waste collection nets are also arranged at the lower end of the stirring support rod, and the solid waste collection nets are used to collect solid precipitates in 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 component, which is used to connect the stirring main rod. The first connecting component includes a first connecting part, the outer part of the first connecting part is rotatably connected to the second connecting part, and a drug delivery tube is installed on the second connecting part. The other end of the drug delivery tube is connected to the drug source. A first exchange chamber is formed between the first connecting part and the second connecting part. A first connecting tube is provided inside the stirring main rod, and the first exchange chamber and the first connecting tube are communicated with each other. A second connecting tube matching the first connecting tube is provided inside the stirring support rod, and the first connecting tube and the second connecting tube are communicated with each other, and the first one-way valve matches the second connecting tube.

[0009] In one or more embodiments of the present invention, a first cleaning liquid delivery pipe is installed on the second connecting portion, and the other end of the first cleaning liquid delivery pipe is connected to a water source. A second one-way valve is installed on the side wall of the stirring support rod, and the second one-way valve matches the second connecting pipe. The second one-way valve can spray the fluid in the second connecting pipe to 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 main rod is connected to a fluid pipeline, and the fluid pipeline is used to transport fluid. The fluid pipeline includes a second connecting component, and the second connecting component includes a third connecting part. The third connecting part is fixedly connected to the stirring support rod. The third connecting part is rotatably connected to a fourth connecting part and a fifth connecting part. The fourth connecting part and the fifth connecting part are arranged on the third connecting part up and down. 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 exchange chamber and the third exchange chamber are both communicated with the 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 main rod, and the other end is communicated with the second exchange chamber. One end of the fourth connecting part 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 part, and the first hot gas output pipe is used to discharge the fluid after heat exchange.

[0011] In one or more embodiments of the present invention, a transport assembly is included, which is used to move the stirring assembly to other reaction tanks. The transport assembly includes a transverse connecting rod, which is slidably connected to a sliding member along the setting 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 assembly.

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

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

[0014] In one or more embodiments of the present invention, a second cleaning liquid delivery pipe is also installed on the side wall of the filter bin, the other end of the second cleaning liquid delivery pipe is connected to a water source, an alkali solution delivery pipe is arranged on the second cleaning liquid delivery pipe, the other end of the alkali 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 liquid delivery pipe to form a mixed liquid, a plurality of cleaning liquid delivery branches are arranged at one end of the second cleaning liquid delivery pipe located in the filter bin, a nozzle is arranged on the cleaning liquid delivery branch, the nozzle sprays the mixed liquid on the solid precipitate on the V-shaped filter plate to clean the solid precipitate, and a liquid output pipe for discharging the liquid at the lower end of the V-shaped filter plate is also arranged at one end of the filter bin.

[0015] In one or more embodiments of the present invention, a groove is provided at the lower end of the shell, and a solid waste conveying pipe is arranged between the filter bin and the groove, and the solid waste conveying pipe is used to discharge the solid sediment on the V-shaped filter plate into the groove; a collecting assembly is detachably installed in the groove, and the collecting assembly is used to load the solid sediment discharged by 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 air input pipe and a second hot air output pipe matching the connecting valve are installed on the side wall of the groove, and the hot air input pipe is used to convey hot fluid into the third cavity, and the second hot air output pipe is used to output the hot fluid in the third cavity; a drainage hole is provided on the bottom wall of the collecting assembly, and a sealing cover matching the drainage hole is installed on the collecting assembly.

[0016] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0017] A method for recycling lithium-containing wastewater comprises the following steps:

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

[0019] Adding a reagent to the lithium-containing wastewater, stirring and heating the reagent to react with the lithium-containing wastewater, and removing the solid precipitate after a solid precipitate is formed in the lithium-containing wastewater;

[0020] S2. Treatment of solid precipitate:

[0021] Using alkaline solution to clean the solid precipitate, washing the lithium-containing wastewater on the solid precipitate, and drying the solid precipitate;

[0022] The wastewater generated by washing the solid precipitate is the first neutralization liquid;

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

[0024] Detecting the pH value of the lithium-containing wastewater, and adding acid or alkali to the lithium-containing wastewater according to the water quality to adjust the pH value of the lithium-containing wastewater;

[0025] When an alkali solution is needed to adjust the pH value, the first neutralizing solution is preferentially used to adjust the pH value of the lithium-containing wastewater;

[0026] S4. Filtration of lithium-containing wastewater:

[0027] Reduce the suspended solids in raw water by filtering, and reduce the impact of impurities such as impurities such as impurities particles and colloidal droplets on subsequent processes;

[0028] S5, MVR evaporation concentration:

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

[0030] S6. Subsequent steps:

[0031] Obtain lithium-rich mother liquor and sodium chloride.

[0032] Compared with the prior art, the resource treatment device for lithium-containing wastewater of the present invention is conducive to extracting heavy metal ions in lithium-containing wastewater, reducing the filtering pressure of the filtering device, thereby reducing the cleaning and maintenance times of the filtering device, and reducing the cost of resource treatment of lithium-containing wastewater;

[0033] Through the cooperation of the reaction tank and the stirring component, solid precipitates can be formed before the lithium-containing wastewater is filtered, and the formed solid precipitates can be fished out, reducing the filtering pressure of the subsequent process, and the stirring component uses the steam generated by the MVR system, and uses the excess heat of the steam generated by the MVR system to heat the lithium-containing wastewater, so that the heat can be utilized, which is energy-saving and environmentally friendly. Through the transportation component, the stirring component can correspond to different reaction tanks, improve the utilization rate of the stirring component, and reduce the cost required for arranging the stirring component;

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

[0035] A resource treatment method for lithium-containing wastewater of the present invention uses steam generated by an MVR system to act on the pretreatment of lithium-containing wastewater and the treatment of solid precipitates, thereby reducing the energy consumption consumed by the pretreatment of lithium-containing wastewater and the treatment of solid precipitates, and at the same time can reduce the pressure of condensed steam. The wastewater generated by cleaning the solid precipitates can also be used to adjust the pH value of the lithium-containing wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of a lithium-containing wastewater resource treatment device in one embodiment of the present invention Figure 1 ;

[0038] Figure 2 A schematic diagram of a lithium-containing wastewater resource treatment device in one embodiment of the present invention Figure 2 ;

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

[0040] Figure 4 It is a partial structural schematic diagram of a resource treatment device for lithium-containing wastewater in one embodiment of the present invention;

[0041] Figure 5 A partial cross-sectional view of a device for recycling lithium-containing wastewater in one embodiment of the present invention;

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

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

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

[0045] Fig. 9 for Figure 8 Schematic diagram of the structure at C in the middle;

[0046] Fig.10 A cross-sectional view of a secondary processing assembly according to an embodiment of the present invention Figure 1 ;

[0047] Fig.11 A cross-sectional view of a secondary processing assembly according to an embodiment of the present invention Figure 2 ;

[0048] Fig.12 The present invention is a flowchart of a method for recycling lithium-containing wastewater in one embodiment of the present invention.

[0049] Description of main reference numerals:

[0050] 1. Reaction tank; 101. Feed pipe; 102. Discharge pipe; 2. Discharge main pipe; 3. Stirring assembly; 301. Mounting frame; 302. Motor; 303. Stirring main rod; 3031. First cavity; 304. Stirring support rod; 3041. Second cavity; 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. Drug delivery pipe; 8. First cleaning liquid delivery pipe; 9. Hot air input main pipe; 10. Hot air input branch pipe; 11. First hot air output pipe; 12. Second connecting pipe; 13. First one-way valve; 14. Second one-way valve; 1 5. Transport component; 1501. Horizontal connecting rod; 1502. Sliding part; 1503. Vertical connecting rod; 16. Secondary treatment component; 1601. Shell; 16011. Collecting cylinder; 16012. Filter bin; 16013. Connecting hole; 16014. Groove; 1602. Arc plate; 16021. Through hole; 1603. V-shaped filter plate; 17. Alkali solution delivery pipe; 18. Second cleaning liquid delivery pipe; 19. Cleaning liquid delivery branch pipe; 1901. Spray head; 20. Collecting component; 2001. Third cavity; 2002. Handle; 2003. Drain hole; 2004. Connecting valve; 21. Sealing cover; 22. Hot air input pipe; 23. Second hot air output pipe; 24. Solid waste delivery pipe; 2401. Spray head; 25. Liquid output pipe. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0052] like Figure 1 to Figure 3As shown, a resource treatment device for lithium-containing wastewater in one embodiment of the present invention includes a reaction tank 1, which is used to store lithium-containing wastewater. A feed pipe 101 and a discharge pipe 102 are installed on the reaction tank 1, the feed pipe 101 is used to transport the lithium-containing wastewater into the reaction tank 1, and the discharge pipe 102 is used to discharge the lithium-containing wastewater.

[0053] like Figure 1-2 As shown, the reaction tank 1 is provided with a stirring assembly 3, which is used to stir the lithium-containing wastewater in the reaction tank 1, and add reagents to the lithium-containing wastewater during the stirring process to form solid precipitates of heavy metal ions such as nickel, cobalt, and manganese. This step helps to reduce the heavy metal content in the lithium-containing wastewater and lays the foundation for subsequent treatment.

[0054] Specifically, Figures 1 to 9 As shown, the stirring assembly 3 includes a mounting frame 301, on which a stirring main rod 303 is rotatably connected, and a motor 302 is rotatably fixedly connected on one side of the mounting frame 301, and a belt (not shown in the figure) is installed between the output shaft of the motor 302 and the mounting frame 301, that is, the stirring main rod 303 is driven and connected to rotate by the motor 302. A plurality of stirring support rods 304 are also arranged on the stirring main rod 303, and when the stirring main rod 303 rotates, the stirring support rods 304 are driven to rotate in the same direction at the same time, so as to achieve stirring of the lithium-containing wastewater. A dosing pipeline is arranged on the stirring main rod 303, and a first one-way valve 13 matching the dosing pipeline is arranged in the stirring support rod 304, and the medicine flows out from the first one-way valve 13 into the lithium-containing wastewater. The dosing pipeline can add medicine during the stirring process of the stirring main rod 303 and the stirring support rod 304, so that the medicine reacts quickly with the lithium-containing wastewater. Since the depth of the reaction tank 1 matches the stirring main rod 303 and the stirring support rod 304, the stirring support rod 304 can be arranged on the stirring main rod 303 at equal intervals. During the process of adding medicine, the medicine can be evenly and fully mixed with the lithium-containing wastewater, reducing the reaction time of the medicine and the lithium-containing wastewater and improving the reaction efficiency of the medicine and the lithium-containing wastewater.

[0055] like Figures 1 to 9 As shown, during the process of adding medicine and stirring, solid precipitates will be formed in the lithium-containing wastewater. A plurality of solid waste collection nets 305 are provided on the stirring support rod 304. The solid waste collection nets 305 are mesh-shaped and can collect solid precipitates formed in the lithium wastewater during the stirring process. Picking up the solid precipitates during the stirring process can greatly reduce the pressure on the filter device in the subsequent filtering steps, thereby reducing the number of times the filter device is cleaned and maintained, reducing the situation where the solid precipitates cause blockage to the filter device, improving the utilization rate of the filter device, and reducing the cost of cleaning and maintaining the filter device. The solid precipitates collected by the solid waste collection net 305 can be uniformly processed after the addition of medicine and stirring are completed.

[0056] like Figures 5 to 9 As shown, the drug adding pipeline includes a first connecting component 4, the first connecting component 4 includes a first connecting part 401, the outer part of the first connecting part 401 is rotatably connected to the second connecting part 402, the second connecting part 402 is installed with a drug delivery tube 7, and the other end of the drug delivery tube 7 is connected to a drug source. A first exchange cavity is formed between the first connecting part 401 and the second connecting part 402, a first connecting tube 6 is arranged inside the stirring main rod 303, the first exchange cavity and the first connecting tube 6 are communicated, a second connecting tube 12 matching the first connecting tube 6 is arranged inside the stirring support rod 304, the first connecting tube 6 and the second connecting tube 12 are communicated, and a first one-way valve 13 matches the second connecting tube 12. That is, the reagent enters the first exchange chamber from the reagent delivery pipe 7, the first exchange chamber delivers the reagent to the first connecting pipe 6, the first connecting pipe 6 delivers the reagent to the second connecting pipe 12, and the reagent in the second connecting pipe 12 is output to the lithium-containing wastewater through the first one-way valve 13, thereby realizing the addition of the reagent during the stirring process, and enabling the reagent to be evenly output to the lithium-containing wastewater, so that the heavy metal ions in the lithium-containing wastewater can quickly contact with the reagent and form solid precipitates.

[0057] like Figure 1 to Figure 6 As shown, a first cleaning liquid delivery pipe 8 is installed on the second connecting portion 402, and the other end of the first cleaning liquid delivery pipe 8 is connected to a water source, and the first cleaning liquid delivery pipe 8 and the first exchange chamber are connected. A second one-way valve 14 is installed on the side wall of the stirring support rod 304, and the second one-way valve 14 matches the second connecting pipe 12. The second one-way valve 14 can spray the fluid in the second connecting pipe 12 to the inner wall of the reaction tank 1 in a fan shape, so as to clean the inner wall of the reaction tank 1. With the rotation of the stirring support 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 process.

[0058] Specifically, the water source connected to the other end of the first cleaning liquid delivery pipe 8 is water stored in a fresh water pool after being processed by the treatment process, and the pH value of the water meets the process requirements. The water after the process treatment is used to clean the inner wall of the reaction tank 1. The wastewater generated after the cleaning does not need to be discharged, but is directly stored in the reaction tank 1, and then the lithium-containing wastewater is added to the reaction tank 1 through the feed pipe 101. The lithium-containing wastewater and the wastewater generated by cleaning the reaction tank 1 are mixed, and the pH value of the lithium-containing wastewater can be adjusted, so that the pH value of the lithium-containing wastewater is neutralized, thereby reducing the hydrochloric acid or alkali solution used to adjust the pH value of the lithium-containing wastewater, thereby reducing the cost of treating the lithium-containing wastewater.

[0059] like Figures 1 to 9As shown, a first cavity 3031 is defined in the stirring main rod 303, and a second cavity 3041 is defined in the stirring support rod 304. The first cavity 3031 and the second cavity 3041 are interconnected, and the interiors thereof 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 between the lithium-containing wastewater and the reagent and reducing the time consumed for mixing the reagent and the lithium-containing wastewater.

[0060] Specifically, Figures 5 to 9 As shown, one end of the stirring main rod 303 is connected to a fluid pipeline, and the fluid pipeline is used to transport fluid. The fluid pipeline includes a second connecting component 5, and the second connecting component 5 includes a third connecting part 501, and the third connecting part 501 is fixedly connected to the stirring support rod 304. The third connecting part 501 is rotatably connected to the fourth connecting part 502 and the fifth connecting part 503, and the fourth connecting part 502 and the fifth connecting part 503 are arranged on the third connecting part 501 up and down. A second exchange chamber is formed between the fourth connecting part 502 and the third connecting part 501, and a third exchange chamber is formed between the fifth connecting part 503 and the third connecting part 501. The second exchange chamber and the third exchange chamber are both communicated with the first cavity 3031. The inner wall of the first cavity 3031 is provided with a hot air input branch pipe 10, one end of the hot air input branch pipe 10 is close to the bottom of the stirring main rod 303, and the other end is connected to the second exchange chamber. The hot air input branch pipe 10 can change the position of the inlet and outlet of the heat source, thereby avoiding the situation where the heat source is extracted as soon as it enters. One end of the fourth connection part 502 is connected to the hot gas input main pipe 9, and the other end of the hot gas input main pipe 9 is connected to the heat source. The first hot gas output pipe 11 is installed on the fifth connection part 503, and the first hot gas output 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 input main pipe 9, and then diffuses from the bottom of the first cavity 3031 to the second cavity 3041, and after heat exchange with the lithium-containing wastewater, it is discharged from the first cavity 3031 through the second exchange cavity and the first hot gas output pipe 11.

[0061] Preferably, the hot air input branch pipe 10 is provided with a plurality of evenly distributed heat dissipation holes along the direction in which it is provided, and when the heat source passes through the hot air input branch pipe 10, the heat dissipation holes can evenly distribute the heat source in the first cavity 3031. Of course, the hot air input branch pipe 10 can also extend to the second cavity 3041 to realize the transportation of the heat source.

[0062] Among them, the heat source connected to one end of the hot gas input main pipe 9 is the steam evaporated by the MVR system, which enters the first cavity 3031 before condensation, and is discharged from the first cavity 3031 after heat exchange, and then condensed to obtain fresh water. The steam evaporated by the MVR system is used to heat the first cavity 3031 and the second cavity 3041, so as to achieve the heating of the lithium-containing wastewater. The heat of the steam generated by the MVR system is used to utilize the unnecessary heat, which greatly reduces the cost of heating the lithium-containing wastewater during the stirring process of the stirring component 3. While using the heat of the steam generated by the MVR system, the heat of the steam generated by the MVR system is reduced, and the energy generated by the condensation of the steam by the MVR system is reduced, thereby reducing the cost of using the MVR system and saving energy and protecting the environment.

[0063] Preferably, the MVR system will also generate a large amount of unnecessary heat during use. A heat absorption device matching the MVR system can be provided to absorb the excess heat generated by the MVR system and transfer the absorbed heat to the fluid pipeline to achieve heating of the stirring main rod 303 and the stirring support rod 304, so that the MVR system can be cooled without affecting the use of the MVR system.

[0064] like Figure 1-2 As shown, after the lithium-containing wastewater in the reactor 1 is stirred, a certain degree of precipitation is required to allow the reagent and the lithium-containing wastewater to react completely. During the precipitation process, the stirring assembly 3 is in an idle state. Due to the setting of the fluid pipeline and the dosing pipeline, if the stirring assembly 3 is in an idle state, the cost of setting the fluid pipeline and the dosing pipeline is not proportional to the effect obtained. In order to solve the above problem, a transport assembly 15 is provided at the upper end of the stirring assembly 3, and the stirring assembly 3 can be directed to multiple reactors 1 through the transport assembly 15. When one of the reactors 1 needs to be left to settle, the stirring assembly 3 can be moved to another reactor 1 through the transport assembly 15 to achieve the treatment of lithium-containing wastewater. The utilization rate of the stirring assembly 3 is greatly increased, and one stirring assembly 3 can be used for multiple reactors 1, which can reduce the cost of setting the fluid pipeline and the dosing pipeline. When a portion of the solid precipitate is collected by the solid waste collection network 305 and enters another reaction tank 1, the collected solid precipitate will also have residual reagents, and the solid precipitate has a higher reagent content than the residual reagents in the lithium-containing wastewater. The residual reagents react with the lithium-containing wastewater in another reaction tank 1, which can also reduce the amount of reagents used, save the cost of removing heavy metal ions from the lithium-containing wastewater, and further realize the resource treatment of the lithium-containing wastewater. Using the reagents on the solid precipitate to react in other reaction tanks 1 can also reduce the content of the reagents on the solid precipitate.

[0065] like Figure 1 to Figure 4As shown, the transport assembly 15 includes a transverse connecting rod 1501, and a sliding member 1502 is slidably connected along the setting direction of the transverse connecting rod 1501. A vertical connecting rod 1503 is provided on the sliding member 1502. The vertical connecting rod 1503 moves in the vertical direction, and one end of the vertical connecting rod 1503 is detachably connected to the stirring assembly 3. Specifically, it can be a magnetic attraction, a bolt fixed connection or other detachable connection methods. The upper end of the mounting frame 301 is fixedly connected with an L-shaped connecting frame 306, 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, one end of the discharge pipe 102 away from the reaction tank 1 is fixedly connected to the discharge main pipe 2, and the other 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 clean the solid precipitate, clean the lithium-containing wastewater and reagents remaining on the solid precipitate, and is more conducive to the subsequent resource treatment of the solid precipitate.

[0067] Specifically, Figure 10-11 As shown, the secondary processing assembly 16 includes a shell 1601, and a collection barrel 16011 is provided at the upper end of the shell 1601. The collection barrel 16011 matches the stirring assembly 3, and the stirring assembly 3 can be placed in the collection barrel 16011. The depth and inner diameter of the collection barrel 16011 are the same as the depth and outer diameter of the reaction tank 1. Of course, the depth of the collection barrel 16011 can be greater than the depth of the reaction tank 1, and the inner diameter of the collection barrel 16011 can also be greater than the inner diameter of the reaction tank 1, as long as the stirring main rod 303 and the stirring support rod 304 can be placed in the collection barrel 16011. When the stirring main rod 303 and the stirring support rod 304 are placed in the collecting barrel 16011, the stirring main rod 303 rotates inside the collecting barrel 16011, and rotates in the opposite direction to the rotation direction of the stirring main rod 303 in the reaction tank 1. The stirring main rod 303 rotates in the reverse direction, and the solid sediment in the solid waste collecting net 305 is subjected to the opposite direction of force. At the same time, the solid waste collecting net 305 is deformed, and the solid sediment will be discharged from the solid waste collecting net 305 and fall into the collecting barrel 16011. The collecting barrel 16011 collects the solid sediment, and the solid sediment in the collecting barrel 16011 can be processed.

[0068] like Figure 10-11As shown, a filter bin 16012 is provided on one side of the collecting tube 16011 of the housing 1601, and the discharge main pipe 2 is connected to the filter bin 16012. A V-shaped filter plate 1603 is fixedly connected to the side wall of the filter bin 16012, and 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 filtering accuracy of the V-shaped filter plate 1603 is about 10 to 100 μm. A liquid output pipe 25 matching the filter bin 16012 is installed on the housing 1601, and the liquid after solid-liquid separation is discharged into the water pool through the liquid output pipe 25, and the waste liquid in the water pool waits for the pH value to be neutralized before the next process step is carried out.

[0069] In order to reduce the impact force of the waste liquid discharged from the discharge main pipe 2 on the V-shaped filter plate 1603, resulting in damage to the V-shaped filter plate 1603, such as Fig.10 As shown, an arc plate 1602 is installed on the side wall of the filter bin 16012, and the arc plate 1602 is installed on the upper end of the V-shaped filter plate 1603. The arc plate 1602 is an arc structure that bulges upward. When the waste liquid enters the filter bin 16012, it first contacts the arc plate 1602, and most of the impact force is reduced by the arc plate 1602, so as to avoid the situation where the V-shaped filter plate 1603 is damaged due to the impact force of the waste liquid as much as possible. Through holes 16021 are set on both sides of the arc plate 1602, and the waste liquid flows from the through holes 16021 to the V-shaped filter plate 1603.

[0070] like Fig.10 As shown, a connection hole 16013 is provided between the collection barrel 16011 and the filter bin 16012, and the connection hole 16013 is provided at the upper end of the V-shaped filter plate 1603. The solid precipitate in the collection barrel 16011 can enter the filter bin 16012 through the connection hole 16013, and can be further filtered through the V-shaped filter plate 1603.

[0071] like Figure 10-11As shown, a second cleaning liquid delivery pipe 18 is also installed on the side wall of the filter bin 16012, and the other end of the second cleaning liquid delivery pipe 18 is connected to a water source, which is also fresh water produced after the resource treatment of lithium-containing wastewater is completed. An alkali solution delivery pipe 17 is also provided on the second cleaning liquid delivery pipe 18, and the other end of the alkali solution delivery pipe 17 is connected to a cleaning agent source, and the cleaning agent is specifically alkali solution. The water source and the cleaning agent source can be mixed in the second cleaning liquid delivery pipe 18 to form a mixed solution. The concentration of the mixed solution for cleaning solid precipitates can be changed as needed, that is, the flow rate of water in the second cleaning liquid delivery pipe 18 or the flow rate of the cleaning agent in the alkali solution delivery pipe 17 is changed. 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 and fresh water is changed according to the cleaning needs, so that the process of cleaning solid precipitates can save costs and have a good cleaning effect.

[0072] Since the mixed solution used for cleaning the solid precipitate is an alkali solution, it is mixed with the fresh water obtained by the process. During cleaning, the used mixed solution will be temporarily stored in the filter bin 16012. After cleaning, the mixed solution is collectively output to the storage container for storage. When the lithium-containing wastewater needs to use alkali to adjust the pH value of the lithium-containing wastewater, the mixed solution can be adjusted. That is, the alkali solution can not only adjust the pH value, but also clean the solid precipitate. That is, adding the step of cleaning the solid precipitate to the prior art will not increase the cost of use.

[0073] like Fig.10 As shown, a plurality of cleaning liquid delivery branches 19 are provided at one end of the second cleaning liquid delivery pipe 18 located in the filter chamber 16012, and a nozzle 1901 is provided on the cleaning liquid delivery branch pipe 19, and the nozzle 1901 sprays the mixed liquid on the solid precipitate on the V-shaped filter plate 1603 to clean the solid precipitate. The mixed liquid after cleaning is separated from the solid precipitate by the V-shaped filter plate 1603, and the dryness of the solid precipitate is ensured as much as possible, so as to facilitate drying of the solid precipitate.

[0074] like Figure 10-11As shown, a groove 16014 is provided at the lower end of the housing 1601, and a solid waste conveying pipe 24 is provided between the filter chamber 16012 and the groove 16014. The solid waste conveying pipe 24 is used to discharge the solid precipitate on the V-shaped filter plate 1603 into the groove 16014. The solid waste conveying pipe 24 is located in the groove 16014 and is provided with a plurality of spray heads 2401. The plurality of spray heads 2401 can convey the solid precipitate to the groove 16014 relatively evenly. A detachable collecting assembly 20 is installed in the groove 16014, and the collecting assembly 20 is used to load the solid precipitate discharged by the solid waste conveying pipe 24. The collecting assembly 20 and the groove 16014 are interference fit, and the collecting assembly 20 and the groove 16014 form a closed space, and the exhaust gas generated by the solid precipitate during filtration is not easy to be discharged from the connection between the collecting assembly 20 and the groove 16014. Of course, a fresh air system can also be set up in the groove 16014 to discharge the exhaust gas after treatment.

[0075] Specifically, the collecting assembly 20 has a third cavity 2001, and a connecting valve 2004 matching the third cavity 2001 is installed at one end of the collecting assembly 20, and the number of the connecting valves 2004 is two. A hot air input pipe 22 and a second hot air output pipe 23 matching the connecting valve 2004 are installed on the side wall of the groove 16014. The hot air input pipe 22 is used to transport hot fluid into the third cavity 2001, and the second hot air output pipe 23 is used to output the hot fluid in the third cavity 2001. That is, the connecting valve 2004 and the hot air input pipe 22 cooperate to transport the hot fluid to the third cavity 2001, and the hot fluid exchanges heat with the solid precipitate located on the collecting assembly 20, so that the solid precipitate becomes dry. The other end of the hot air input pipe 22 is used to connect the steam generated by the MVR system. After the heat exchange, the heat of the steam becomes lower, so that the energy generated by the MVR system to cool the steam can be reduced, which plays a role in energy saving and environmental protection. The second hot gas output pipe 23 cooperates with the connecting valve 2004 to deliver the steam after heat exchange to the condensation step of the MVR system.

[0076] Furthermore, the hot air input pipe 22, the collecting assembly 20 and the second hot air output pipe 23 form a passage for condensing steam. When the passage connecting the valve 2004 and the hot air input pipe 22 is disconnected, the steam will not enter the hot air input pipe 22, thereby avoiding the waste of steam.

[0077] like Figure 10-11As shown, the bottom wall of the collecting assembly 20 is provided with a drain hole 2003, and a sealing cover 21 matching the drain hole 2003 is installed on the collecting assembly 20. When the collecting assembly 20 stops heat exchange, part of the steam will remain in the third cavity 2001, and the steam in the third cavity 2001 can be directly discharged through the drain hole 2003, or the condensed water can be discharged from the drain hole 2003 after the steam in the third cavity 2001 forms condensed water when the collecting assembly 20 is cooled to room temperature. The lower end of the collecting assembly 20 is also provided with a universal wheel (not shown in the figure), and the collecting assembly 20 can be easily pulled out by the universal wheel, so as to facilitate the processing of the dried solid precipitate. In order to facilitate the movement of the collecting assembly 20, a handle 2002 is also provided on one side of the collecting assembly 20, and the collecting assembly 20 can be easily pulled by the handle 2002.

[0078] When using, Figures 1 to 11 As shown, first, lithium-containing wastewater is transported to the reaction tank 1 through the feed pipe 101, and the lithium-containing wastewater in the reaction tank 1 is stirred by the stirring assembly 3. At the same time, the hot steam generated by the MVR system is transported to the first cavity 3031 through the fluid pipeline, and the hot steam is transported to the second cavity 3041 by the first cavity 3031, so as to heat the lithium-containing wastewater while stirring. After the heat exchange of the hot steam is completed, it is transported back to the condensation area of ​​the MVR system through the fluid pipeline. When the lithium-containing wastewater reaches a certain temperature, the drug liquid is added to the lithium-containing wastewater through the drug-dosing pipeline. The drug liquid is located in the drug-dosing pipeline and can also exchange heat with the hot steam in the fluid pipeline, so that the temperature of the drug liquid sprayed into the lithium-containing wastewater is not much different from the temperature of the lithium-containing wastewater, or even the same as the temperature of the lithium-containing wastewater, so that the lithium-containing wastewater and the drug liquid can be quickly mixed and reacted quickly. The stirring assembly 3 continues to stir, so that solid precipitates are formed in the lithium-containing wastewater. During the stirring process of the stirring assembly 3, the solid waste collection net 305 can collect part of the solid precipitates in the lithium-containing wastewater, reducing the filtration pressure in the subsequent process. The solid waste collection net 305 can also further increase the stirring force and the stirring speed during the rotation of the stirring assembly 3. When one of the reaction tanks 1 is stirred and mixed, it needs to be left to stand and settle, and the stirring assembly 3 is moved to the next reaction tank 1 through the transport assembly 15, and the above-mentioned use steps are repeated.

[0079] When the solid sediment in the solid waste collection net 305 is fully collected, 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 the reaction tank 1 is precipitated, the lithium-containing wastewater is transported to the discharge main pipe 2 through the discharge pipe 102, and the lithium-containing wastewater is transported to the filter bin 16012 by the discharge main pipe 2, and solid-liquid separation is performed through the V-shaped filter plate 1603. After the solid-liquid separation is completed, the fresh water obtained by the process is transported to the V-shaped filter plate 1603 using the second cleaning liquid delivery pipe 18, and the solid precipitate is cleaned. At the same time, the alkali liquid is transported through the alkali liquid delivery pipe 17, so that the fresh water and the alkali liquid are mixed to form a mixed liquid, and the solid precipitate is cleaned more cleanly. The mixed liquid after cleaning is temporarily stored and used when the pH value needs to be adjusted, which greatly saves resources and saves usage costs.

[0081] After cleaning, the solid sediment is transported to the collection assembly 20 through the solid waste transport pipe 24. The collection assembly 20 can dry the solid sediment by cooperating with the hot air input pipe 22, the third cavity 2001 and the second hot air output pipe 23. When the solid sediment on the collection assembly 20 is dry, the collection assembly 20 can be pulled out by cooperating with the handle 2002 and the universal wheel, and the solid sediment in the collection assembly 20 can be cleaned.

[0082] In actual use, the wastewater treatment line is started for the first time, the lithium-containing wastewater has not yet entered the MVR system, and the MVR system has not yet generated hot steam. In the process of stirring by the stirring component 3, the steam used can be supplemented by artificial compensation. Of course, steam can also be not used, which will only affect the speed of generating solid precipitates when the wastewater treatment line is just started, and will not affect the use of steam generated by the subsequent MVR system.

[0083] The present invention can form solid precipitates before the lithium-containing wastewater is filtered through the cooperation of the reaction tank 1 and the stirring component 3, and can remove the formed solid precipitates, thereby reducing the filtering pressure of the subsequent process. The stirring component 3 uses the steam generated by the MVR system, and uses the excess heat of the steam generated by the MVR system to heat the lithium-containing wastewater, so that the heat can be utilized, which is energy-saving and environmentally friendly. The transportation component 15 can make the stirring component 3 correspond to different reaction tanks 1, improve the utilization rate of the stirring component 3, and reduce the cost required to arrange the stirring component 3.

[0084] The present invention can process the solid precipitate by setting the secondary treatment component 16, realize solid-liquid separation, and wash the solid precipitate. The wastewater generated after washing can be used to adjust the pH value of lithium-containing wastewater, saving the cost of washing the solid precipitate. The solid precipitate can be dried by setting the collection component 20, and the heat of the steam generated by the MVR system is utilized, which also plays the role of energy saving and environmental protection.

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

[0086] Specifically, the pretreatment of lithium-containing wastewater is to add a reagent to the lithium-containing wastewater, react the reagent with the lithium-containing wastewater, and remove the solid precipitate after forming a solid precipitate in the lithium-containing wastewater. This step can reduce the filtration pressure of the subsequent filtration step, thereby reducing the cost of cleaning and maintenance of the filtration device. Solidifying and precipitating heavy metals in lithium-containing wastewater can also increase the lithium content in the lithium-containing wastewater, making the lithium purity of the lithium-containing wastewater higher.

[0087] The treatment of solid precipitates is to use alkaline solution to clean the solid precipitates, clean the lithium-containing wastewater on the solid precipitates, and dry the solid precipitates. The alkali can quickly and cleanly wash away the lithium-containing wastewater on the solid precipitates, making the solid precipitates purer and facilitating the subsequent resource treatment of the solid precipitates. The wastewater generated by cleaning the solid precipitates is the first neutralizing solution, which can be used to adjust the pH value of the lithium-containing wastewater.

[0088] To adjust the pH value of lithium-containing wastewater, the pH value of lithium-containing wastewater must first be tested, and acid or alkali must be added to the lithium-containing wastewater according to the test results to adjust the pH value of the lithium-containing wastewater. When alkali solution is needed to adjust the pH value, the first neutralizing solution is preferably used to adjust the pH value of the lithium-containing wastewater. By using the first neutralizing solution, the alkali solution used to clean the solid precipitate can be reused, reducing the cost of the process and saving energy and protecting the environment.

[0089] Filtration of lithium-containing wastewater is to reduce the suspended matter in raw water, reduce the impact of impurities such as impurities such as impurities particles and colloidal droplets on subsequent processes through filtration.

[0090] MVR evaporation and concentration is to evaporate and concentrate lithium-containing wastewater through the MVR system to obtain concentrated liquid and steam. Steam can be used for pretreatment of lithium-containing wastewater and treatment of solid sediments. The temperature of steam is reduced by pretreatment of lithium-containing wastewater and treatment of solid sediments. Fresh water is obtained after condensation of the steam with reduced temperature. The excess heat of steam is utilized to reduce the pressure of condensed steam, and the cost of using the process can be saved, which is energy-saving and environmentally friendly.

[0091] In the subsequent steps, when the sodium chloride concentration in the MVR system reaches the discharge concentration, the feed liquid is transferred to the thickening system for concentration to obtain lithium-rich mother liquor and sodium chloride, which are filtered and centrifuged to obtain solid crystalline sodium chloride salt. The mother liquor after the solid is removed is subjected to lithium precipitation to finally obtain lithium.

[0092] In the present invention, the steam generated by the MVR system is used to pretreat the lithium-containing wastewater and treat the solid precipitate, thereby reducing the energy consumption of the lithium-containing wastewater pretreatment and the solid precipitate treatment, and at the same time, the pressure of the condensed steam can be reduced. The wastewater generated by cleaning the solid precipitate can also be used to adjust the pH value of the lithium-containing wastewater.

[0093] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0094] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A resource treatment device for lithium-containing wastewater, characterized in that: include: A reaction tank, wherein the reaction tank is used to store lithium-containing wastewater; A stirring component, wherein the stirring component is used to stir the lithium-containing wastewater in the reaction tank; The stirring assembly comprises a mounting frame, on which a stirring main rod is rotatably connected, and on which a plurality of stirring support rods are arranged; A first cavity is formed in the stirring main rod, and a second cavity is formed on the stirring support rod. The first cavity and the second cavity are connected, and the first cavity and the second cavity can be used to circulate a heat source. The stirring assembly further comprises a dosing pipeline, which is arranged on the stirring main rod, and the stirring support rod is provided with a first one-way valve matching the dosing pipeline; A plurality of solid waste collection nets are also provided at the lower end of the stirring support rod, and the solid waste collection nets are used to collect solid precipitates in the lithium-containing wastewater during the stirring process.

2. A resource treatment device for lithium-containing wastewater according to claim 1, characterized in that: The dosing pipeline includes a first connecting component, and the first connecting component is used to connect the stirring main rod; The first connection assembly comprises a first connection part, the outer portion of the first connection part is rotatably connected to a second connection part, a drug delivery tube is installed on the second connection part, and the other end of the drug delivery tube 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 arranged inside the stirring main rod, the first exchange chamber and the first connecting pipe are communicated, a second connecting pipe matching the first connecting pipe is arranged inside the stirring support rod, the first connecting pipe and the second connecting pipe are communicated, and the first one-way valve is matched with the second connecting pipe.

3. A resource treatment device for lithium-containing wastewater according to claim 2, characterized in that: A first cleaning liquid delivery pipe is installed on the second connection portion, and the other end of the first cleaning liquid 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 matches the second connecting pipe. The second one-way valve can spray the fluid in the second connecting pipe to the inner wall of the reaction tank in a fan shape to clean the inner wall of the reaction tank.

4. A resource treatment device for lithium-containing wastewater according to claim 1, characterized in that: One end of the stirring main rod is connected to a fluid pipeline, and the fluid pipeline is used to transport the fluid; The fluid pipeline includes a second connecting assembly, the second connecting assembly includes a third connecting portion, the third connecting portion is fixedly connected to the stirring support rod, the third connecting portion is rotatably connected to a fourth connecting portion and a fifth connecting portion, the fourth connecting portion and the fifth connecting portion are arranged on the third connecting portion from top to bottom, a second exchange chamber is formed between the fourth connecting portion and the third connecting portion, and a third exchange chamber is formed between the fifth connecting portion and the third connecting portion; The second exchange chamber and the third exchange chamber are both connected to the first chamber, and a hot air input branch pipe is provided on the inner wall of the first chamber, one end of the hot air input branch pipe is close to the bottom of the stirring main rod, and the other end is connected to the second exchange chamber; One end of the fourth connection portion is connected to a hot air input main pipe, and the other end of the hot air input main pipe is connected to a heat source; The fifth connecting portion is provided with a first hot air output pipe, and the first hot air output pipe is used to discharge the fluid after heat exchange.

5. A resource treatment device for lithium-containing wastewater according to claim 1, characterized in that: It includes a transport component, and the transport component is used to move the stirring component to another reaction tank; The transport assembly comprises a transverse connecting rod, a sliding member is slidably connected along the setting direction of the transverse connecting rod, a vertical connecting rod is arranged on the sliding member, and one end of the vertical connecting rod is detachably connected to the stirring assembly.

6. A resource treatment device for lithium-containing wastewater according to claim 1, characterized in that: The reaction tank is provided with a feed pipe, the feed pipe is used to transport the lithium-containing wastewater into the reaction tank, and a discharge pipe is provided at one end away from the feed pipe; The end of the discharge pipe away from the reaction tank is fixedly connected to a discharge main pipe, and the end of the discharge main pipe away from the reaction tank is connected to a secondary processing component, and the secondary processing component is used to filter the solid precipitate, achieve solid-liquid separation, and clean the solid precipitate.

7. A resource treatment device for lithium-containing wastewater according to claim 6, characterized in that: The secondary processing component comprises a shell, the upper end of which is provided with a collecting cylinder, the collecting cylinder matches the stirring component, and the stirring component can be placed in the collecting cylinder; The shell is also provided with a filter bin on one side of the collecting cylinder, and the discharge main pipe is connected to the filter bin; A V-shaped filter plate is fixedly connected to the side wall of the filter bin, and the V-shaped filter plate is used to filter the solid sediment discharged from the discharge main pipe; The filter bin is provided with an arc plate at the upper end of the V-shaped filter plate, and through holes are provided on both sides of the arc plate; A connecting hole is arranged between the collecting cylinder and the filtering bin, and the connecting hole is arranged at the upper end of the V-shaped filtering plate.

8. A resource treatment device for lithium-containing wastewater according to claim 7, characterized in that: A second cleaning liquid delivery pipe is also installed on the side wall of the filter bin, the other end of the second cleaning liquid delivery pipe is connected to a water source, an alkali liquid delivery pipe is arranged on the second cleaning liquid delivery pipe, the other end of the alkali liquid delivery pipe is connected to a cleaning agent source, and the water source and the cleaning agent source can be mixed and diluted in the second cleaning liquid delivery pipe to form a mixed liquid; A plurality of cleaning liquid delivery branches are arranged at one end of the second cleaning liquid delivery pipe located in the filter bin, and a nozzle is arranged on the cleaning liquid delivery branch. The nozzle sprays the mixed liquid on the solid sediment on the V-shaped filter plate to clean the solid sediment; One end of the filter bin is also provided with a liquid output pipe for discharging the liquid located at the lower end of the V-shaped filter plate.

9. A resource treatment device for lithium-containing wastewater according to claim 8, characterized in that: A groove is provided at the lower end of the shell, and a solid waste conveying pipe is provided between the filter bin and the groove, and the solid waste conveying pipe is used to discharge the solid sediment on the V-shaped filter plate into the groove; A collecting assembly is detachably installed in the groove, and the collecting assembly is used to load the solid sediment discharged from the solid waste conveying pipe; The collecting assembly has a third cavity, a connecting valve matching the third cavity is installed at one end of the collecting assembly, a hot air input pipe and a second hot air output pipe matching the connecting valve are installed on the side wall of the groove, the hot air input pipe is used to transport hot fluid into the third cavity, and the second hot air output pipe is used to output the hot fluid in the third cavity; The bottom wall of the collecting component is provided with a drainage hole, and a sealing cover matching the drainage hole is installed on the collecting component.

10. A method for recycling lithium-containing wastewater, characterized in that: The following steps are involved: S1. Pretreatment of lithium-containing wastewater: Adding a reagent to the lithium-containing wastewater, stirring and heating the reagent to react with the lithium-containing wastewater, and removing the solid precipitate after a solid precipitate is formed in the lithium-containing wastewater; S2. Treatment of solid precipitate: Using alkaline solution to clean the solid precipitate, washing the lithium-containing wastewater on the solid precipitate, and drying the solid precipitate; The wastewater generated by washing the solid precipitate is the first neutralization liquid; S3. Adjusting the pH value of lithium-containing wastewater: Detecting the pH value of the lithium-containing wastewater, and adding acid or alkali to the lithium-containing wastewater according to the water quality to adjust the pH value of the lithium-containing wastewater; When an alkali solution is needed to adjust the pH value, the first neutralizing solution is preferentially used to adjust the pH value of the lithium-containing wastewater; S4. Filtration of lithium-containing wastewater: Reduce the suspended solids in raw water by filtering, and reduce the impact of impurities such as impurities such as impurities particles and colloidal droplets on subsequent processes; S5, MVR evaporation concentration: The lithium-containing wastewater is concentrated by MVR evaporation to obtain a concentrate and steam, and the steam can be used for pre-treatment of the lithium-containing wastewater in step S1 and treatment of solid precipitates in step S2. The temperature of the steam is reduced by pre-treatment of the lithium-containing wastewater in step S1 and treatment of solid precipitates in step S2, and the steam with the reduced temperature is condensed to obtain fresh water; S6. Subsequent steps: Obtain lithium-rich mother liquor and sodium chloride.

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