A battery-grade lithium carbonate precipitation mother liquor recovery device

Abstract

The present invention belongs to the technical field of filtration and separation, and in particular, relates to a battery-grade lithium carbonate lithium precipitation mother liquor recovery device, comprising a filter box and an adsorption tank arranged on one side of the filter box, and also comprising: a liquid inlet pipe, the liquid inlet pipe is fixedly inserted into the upper end of the side wall of the filter box, and the inner wall of the filter box is located below the liquid inlet pipe and a filter is fixedly installed; an upper detection unit is fixedly connected to the top of the adsorption tank; an energy storage unit is arranged on the top of the filter box and is connected to the upper detection unit; a suction mechanism is arranged on the side wall of the filter box. The present invention can filter solid impurities, and based on the ion concentration difference before and after ion exchange of the battery-grade lithium carbonate lithium precipitation mother liquor, automatically remind personnel to replace the ion exchange resin filler, and increase the contact area between the mother liquor and the ion exchange resin, improve the separation efficiency and sufficiency, and help reduce lithium ion waste, while avoiding the clogging of the filter screen inlet position.

Description

Technical Field

[0001] The invention belongs to the technical field of filtration and separation, and in particular relates to a battery-grade lithium carbonate precipitation mother liquor recovery device. Background Art

[0002] With the vigorous development of new energy industry, the demand for battery-grade lithium carbonate is growing. As a product of the production process, battery-grade lithium carbonate mother liquor contains a certain amount of lithium. In order to reduce the waste of lithium and avoid the impact of lithium on the environment, the mother liquor needs to be recycled.

[0003] At present, battery-grade lithium carbonate mother liquor can be recovered through a variety of technologies. Common recovery methods include ion exchange (using ion exchange resin to selectively adsorb lithium ions), precipitation (adding a suitable precipitant to recover lithium in the form of precipitation), evaporation concentration (increasing the concentration of lithium salt to achieve recovery), etc. These recovery technologies are aimed at improving the utilization rate of lithium resources and achieving sustainable development. For example, patent announcement number CN117797554B discloses a battery-grade lithium carbonate mother liquor recovery and treatment device and method;

[0004] When the battery-grade lithium carbonate mother liquor is recovered by the ion exchange method, the composition of the battery-grade lithium carbonate mother liquor is complex, containing various impurity ions, and the lithium ion content in the battery-grade lithium carbonate mother liquor is also uncertain, resulting in the inability to accurately grasp the replacement time of the ion exchange resin when performing ion exchange with the ion exchange resin. Now, a timed replacement method is usually adopted. However, if the replacement interval is too long, the ion exchange resin will be saturated due to adsorption, resulting in poor exchange effect on lithium ions, resulting in waste of lithium ions and affecting the recovery rate. If the replacement interval is too short, the number of regeneration operations on the ion exchange resin will increase, which will not only increase the complexity, but also cause waste of ion exchange resin regeneration agents, etc., and the use effect is not good. Summary of the invention

[0005] The object of the present invention is to provide a battery-grade lithium carbonate mother liquor recovery device in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a battery-grade lithium carbonate precipitation mother liquor recovery device, comprising a filter box and an adsorption tank arranged on one side of the filter box, and also comprising:

[0007] The liquid inlet pipe is fixedly plugged into the upper end of the side wall of the filter box, and a filter screen is fixedly installed on the inner wall of the filter box below the liquid inlet pipe;

[0008] An upper detection unit, fixedly connected to the top of the adsorption tank;

[0009] An energy storage unit is arranged on the top of the filter box and is connected to the upper detection unit;

[0010] A suction mechanism is arranged on the side wall of the filter box and is connected to the energy storage unit;

[0011] An ion exchange unit is arranged inside the adsorption tank;

[0012] The breaking mechanism is arranged above the ion exchange unit and is drivingly connected to the energy storage unit;

[0013] A lower detection unit is disposed below the adsorption tank and is connected to the interior of the adsorption tank;

[0014] A trigger mechanism is disposed between the adsorption tank and the filter box and is electrically connected to the upper detection unit and the lower detection unit;

[0015] The controller is fixedly mounted on the outer side wall of the filter box, and the upper detection unit, the energy storage unit, the suction mechanism, the lower detection unit and the trigger mechanism are all electrically connected to the controller.

[0016] Preferably, the upper detection unit includes an upper insulating box arranged above the adsorption tank, two upper electrode rods electrically connected to the controller are fixedly inserted on the end surface of the upper insulating box, and the conductive parts of the two upper electrode rods are arranged inside the upper insulating box, and an upper tube is fixedly connected between the bottom of the upper insulating box and the adsorption tank, and a first electric-controlled valve electrically connected to the controller is installed inside the upper tube.

[0017] Preferably, the energy storage unit includes a hollow plate fixedly mounted on the top of the filter box, a piston plate being slidably mounted inside the hollow plate, a plurality of guide rods being fixedly mounted on the side wall of the piston plate, and each guide rod is slidably connected to the side wall of the hollow plate away from the piston plate, a group of springs are fixedly mounted between the piston plate and the inner wall of the hollow plate, a connecting pipe is fixedly inserted at the top of the hollow plate at a position on the side of the piston plate away from the guide rod, and the connecting pipe is fixedly connected to the upper insulating box, and a second electric control valve electrically connected to the controller is fixedly mounted inside the connecting pipe.

[0018] Preferably, the suction mechanism includes a suction pump fixedly mounted on the lower end of the outer wall of the filter box, and the suction end of the suction pump is connected to the interior of the filter box, the liquid outlet end of the suction pump and the hollow plate are fixedly connected with an infusion tube, and the suction pump is electrically connected to the controller.

[0019] Preferably, the ion exchange unit comprises a bottom cover detachably mounted on the bottom of the adsorption tank, and baffles are fixedly mounted inside the bottom cover and the adsorption tank, and ion exchange resin fillers are filled between the baffles.

[0020] Preferably, the dispersing mechanism includes a fixed plate fixedly mounted inside the adsorption tank on the upper side of the baffle net, a rotating shaft is rotatably provided at the bottom of the fixed plate, and a plurality of evenly distributed striking rods are fixedly mounted on the shaft wall of the rotating shaft, a drainage hole is provided at the end surface of the fixed plate located above each striking rod, a liquid baffle plate is provided above each of the drainage holes, and one end of each liquid baffle plate is fixedly connected to the rotating shaft, and each of the liquid baffle plates is staggered with each of the striking rods, a protective cover is fixedly mounted on the upper end of the outer wall of the adsorption tank, a transmission rod is rotatably provided inside the protective cover, and the transmission rod is connected to the rotating shaft through a chain assembly, each of the guide rods is slidably connected to the side wall of the protective cover, and the rod end of each guide rod is fixedly connected to a movable plate, and the movable plate and the transmission rod are connected through a gear rack assembly.

[0021] Preferably, the lower detection unit includes a lower tube fixedly inserted at the bottom of the bottom cover, the lower tube is fixedly connected to a lower insulating box, two lower electrode rods electrically connected to the controller are fixedly inserted at the end surface of the lower insulating box, and the conductive parts of the two lower electrode rods are both arranged inside the lower insulating box, a drain pipe is fixedly inserted at the bottom of the lower insulating box, a third electrically-controlled valve is installed inside the lower tube, a fourth electrically-controlled valve is installed inside the drain pipe, and the third electrically-controlled valve and the fourth electrically-controlled valve are both electrically connected to the controller.

[0022] Preferably, the trigger mechanism includes an insulating protective cover fixedly arranged between the filter box and the adsorption tank, and an upper electric push rod and a lower electric push rod are fixedly installed inside the insulating protective cover, the upper electric push rod is electrically connected to the controller through two upper electrode rods, and the lower electric push rod is electrically connected to the controller through the lower electrode rod, the upper electric push rod is electrically connected to the controller through the upper electrode rod, the telescopic end of the upper electric push rod is fixedly installed with an upper insulating block, and the end of the upper insulating block is fixedly installed with a conductive block, the telescopic end of the lower electric push rod is fixedly installed with a lower insulating block, and the end of the lower insulating block is fixedly installed with a conductive column, the end of the conductive column is in sliding contact with the side wall of the conductive block, and an electromagnetic switch electrically connected to the conductive column and the conductive block is fixedly installed inside the insulating protective cover, and the electromagnetic switch is electrically connected to the controller.

[0023] Preferably, a push plate is slidably provided above the filter, a connecting frame is fixedly installed on the top of the push plate, the side walls of the connecting frame are slidably connected to the side walls of the filter box and the protective cover, a connecting plate is fixedly installed on the bottom of the movable plate, and the connecting plate is fixedly connected to the end of the connecting frame.

[0024] Compared with the existing technology, the advantages of a battery-grade lithium carbonate precipitation mother liquor recovery device are:

[0025] Through the cooperation of the filter box, adsorption tank, liquid inlet pipe, filter, suction mechanism, energy storage unit, upper detection unit and ion exchange unit, the impurities in the battery-grade lithium carbonate mother liquor can be filtered, and the battery-grade lithium carbonate mother liquor can be recovered by the ion exchange method. Through the cooperation of the upper detection unit with the lower detection unit and the trigger mechanism, the personnel can be automatically reminded to replace the ion exchange resin filler based on the ion concentration difference before and after the ion exchange of the battery-grade lithium carbonate mother liquor.

[0026] By setting up a dispersion mechanism in conjunction with the energy storage unit, the energy stored in the energy storage unit can be used to disperse the battery-grade lithium carbonate precipitation mother liquor before it comes into contact with the ion exchange resin filler, so that the mother liquor forms tiny droplets, increasing the contact area between the mother liquor and the ion exchange resin, improving the exchange efficiency and sufficiency, and helping to reduce lithium ion waste.

[0027] By cooperating with each other, the push plate, connecting frame and connecting plate can cooperate with the energy storage unit, and utilize the energy stored in the energy storage unit to push the impurities filtered on the filter screen, thereby avoiding the filter screen from being blocked at the liquid inlet, and ensuring the filter screen's continuous filtering ability for solid impurities in the mother liquor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a battery-grade lithium carbonate precipitation mother liquor recovery device provided by the present invention;

[0029] Figure 2 It is a schematic diagram of the internal structure of a filter box of a battery-grade lithium carbonate precipitation mother liquor recovery device provided by the present invention;

[0030] Figure 3 It is a schematic diagram of the internal structure of an adsorption tank of a battery-grade lithium carbonate precipitation mother liquor recovery device provided by the present invention;

[0031] Figure 4 The invention provides a battery-grade lithium carbonate precipitation mother liquor recovery device. Figure 3 A magnified view of the structure of part A;

[0032] Figure 5 The invention provides a battery-grade lithium carbonate precipitation mother liquor recovery device. Figure 2 A magnified view of the structure of part B;

[0033] Figure 6 The present invention provides a structural schematic diagram of a trigger mechanism for a battery-grade lithium carbonate mother liquor recovery device.

[0034] In the figure: 1 filter box, 2 adsorption tank, 3 liquid inlet pipe, 4 filter screen, 5 upper detection unit, 51 upper insulation box, 52 upper electrode rod, 53 upper tube, 54 first electric control valve, 6 energy storage unit, 61 hollow plate, 62 piston plate, 63 guide rod, 64 spring, 65 connecting pipe, 66 second electric control valve, 7 suction mechanism, 71 suction pump, 72 infusion tube, 8 ion exchange unit, 81 bottom cover, 82 baffle, 83 ion exchange resin filler, 9 scattering mechanism, 91 fixed plate, 92 rotating shaft, 93 striking rod, 94 drainage hole, 95 liquid baffle plate, 96 Protective cover, 97 transmission rod, 98 chain assembly, 99 movable plate, 910 gear rack assembly, 10 lower detection unit, 101 lower tube, 102 lower insulation box, 103 lower electrode rod, 104 drainage pipe, 105 third electric control valve, 106 fourth electric control valve, 11 trigger mechanism, 111 insulation protective cover, 112 upper electric push rod, 113 lower electric push rod, 114 upper insulation block, 115 conductive block, 116 lower insulation block, 117 conductive column, 118 electromagnetic switch, 12 controller, 13 push plate, 14 connecting frame, 15 connecting plate. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely 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, rather than all the embodiments.

[0036] like Figure 1-Figure 6 As shown, a battery-grade lithium carbonate precipitation mother liquor recovery device includes a filter box 1 and an adsorption tank 2 arranged on one side of the filter box 1, and also includes: a liquid inlet pipe 3, the liquid inlet pipe 3 is fixedly plugged into the upper end of the side wall of the filter box 1, and the inner wall of the filter box 1 is located below the liquid inlet pipe 3 and is fixedly installed with a filter screen 4; an upper detection unit 5 is fixedly connected to the top of the adsorption tank 2, and the upper detection unit 5 includes an upper insulating box 51 arranged above the adsorption tank 2, and the end surface of the upper insulating box 51 is fixedly plugged with two upper electrode rods 52 electrically connected to the controller 12, and the conductive parts of the two upper electrode rods 52 are both arranged inside the upper insulating box 51, and the bottom of the upper insulating box 51 is fixedly connected to the adsorption tank 2. An upper tube 53 is fixedly connected, and a first electrically controlled valve 54 electrically connected to the controller 12 is installed inside the upper tube 53. The first electrically controlled valve 54 is a normally closed solenoid valve, which is opened when the power is on and closed when the power is off. The surface of the upper tube 53 is insulated or made of insulating material.

[0037] The energy storage unit 6 is arranged on the top of the filter box 1 and is connected with the upper detection unit 5. The energy storage unit 6 includes a hollow plate 61 fixedly installed on the top of the filter box 1. A piston plate 62 is slidably provided inside the hollow plate 61. A plurality of guide rods 63 are fixedly installed on the side wall of the piston plate 62, and each guide rod 63 is slidably connected to the side wall of the hollow plate 61 away from the piston plate 62. A group of springs 64 are fixedly provided between the piston plate 62 and the inner wall of the hollow plate 61. A connecting pipe 65 is fixedly inserted at a position on the top of the hollow plate 61 located on the side of the piston plate 62 away from the guide rod 63, and the connecting pipe 65 is fixedly connected with the upper insulating box 51. A second electrically controlled valve 66 electrically connected to the controller 12 is fixedly installed inside the connecting pipe 65. The second electrically controlled valve 66 is a normally closed solenoid valve, which is opened when power is on and closed when power is off. The surface of the connecting pipe 65 is insulated or made of insulating material.

[0038] The suction mechanism 7 is arranged on the side wall of the filter box 1 and is connected with the energy storage unit 6. The suction mechanism 7 includes a suction pump 71 fixedly installed at the lower end of the outer wall of the filter box 1, and the suction end of the suction pump 71 is connected with the interior of the filter box 1. The liquid outlet end of the suction pump 71 and the hollow plate 61 are fixedly connected with an infusion tube 72. The suction pump 71 is electrically connected to the controller 12. When the suction pump 71 is working, the mother liquid inside the filter box 1 can be extracted and transported to the inside of the hollow plate 61 through the infusion tube 72.

[0039] The ion exchange unit 8 is arranged inside the adsorption tank 2, and the ion exchange unit 8 includes a bottom cover 81 detachably installed on the bottom of the adsorption tank 2. The bottom cover 81 and the interior of the adsorption tank 2 are fixedly installed with a baffle 82, and the baffle 82 is filled with ion exchange resin fillers 83. The ion exchange resin fillers 83 can exchange and adsorb lithium ions.

[0040] The dispersing mechanism 9 is arranged above the ion exchange unit 8 and is transmission-connected with the energy storage unit 6. The dispersing mechanism 9 includes a fixed plate 91 fixedly installed inside the adsorption tank 2 and located on the upper side of the baffle 82. A rotating shaft 92 is rotatably provided at the bottom of the fixed plate 91, and a plurality of evenly distributed striking rods 93 are fixedly installed on the shaft wall of the rotating shaft 92. A drainage hole 94 is provided at the end surface of the fixed plate 91 located above each striking rod 93. A liquid baffle plate 95 is provided above each drainage hole 94, and one end of each liquid baffle plate 95 is fixedly connected to the rotating shaft 92. Each liquid baffle plate 95 is staggered with each striking rod 93. A protective cover 96 is fixedly installed at the upper end of the outer wall of the adsorption tank 2. The protective cover 96 is internally rotated with a transmission rod 97, and the transmission rod 97 is connected to the rotating shaft 92 through a chain assembly 98. Each guide rod 63 is slidably connected to the side wall of the protective cover 96, and the rod end of each guide rod 63 is fixedly connected with a movable plate 99. The movable plate 99 is connected to the transmission rod 97 through a gear rack assembly 910. The end of the striking rod 93 is in the shape of a steel ball, which is conducive to breaking up the mother liquid. The chain assembly 98 includes a chain, two sprockets and other components. With the cooperation of the sprocket, the chain can make the transmission rod 97 and the rotating shaft 92 rotate synchronously. The gear rack assembly 910 includes gears, racks and other components. When the rack moves, it can drive the gear to drive the transmission rod 97 to rotate.

[0041] The lower detection unit 10 is arranged below the adsorption tank 2 and is connected to the interior of the adsorption tank 2. The lower detection unit 10 includes a lower tube 101 fixedly plugged into the bottom of the bottom cover 81. The lower tube 101 is fixedly connected to a lower insulating box 102. The end surface of the lower insulating box 102 is fixedly plugged with two lower electrode rods 103 electrically connected to the controller 12, and the conductive parts of the two lower electrode rods 103 are both arranged inside the lower insulating box 102. The bottom of the lower insulating box 102 is fixedly plugged with a row of The liquid pipe 104 and the lower pipe 101 are internally installed with a third electrically controlled valve 105, and the discharge pipe 104 is internally installed with a fourth electrically controlled valve 106, and the third electrically controlled valve 105 and the fourth electrically controlled valve 106 are both electrically connected to the controller 12, and the third electrically controlled valve 105 and the fourth electrically controlled valve 106 are both normally closed solenoid valves, which are opened when the power is on and closed when the power is off, and the surfaces of the third electrically controlled valve 105, the fourth electrically controlled valve 106, the lower pipe 101 and the discharge pipe 104 are all insulated.

[0042] The trigger mechanism 11 is arranged between the adsorption tank 2 and the filter box 1, and is electrically connected to the upper detection unit 5 and the lower detection unit 10. The trigger mechanism 11 includes an insulating protective cover 111 fixedly arranged between the filter box 1 and the adsorption tank 2, and an upper electric push rod 112 and a lower electric push rod 113 are fixedly installed inside the insulating protective cover 111. The upper electric push rod 112 is electrically connected to the controller 12 through two upper electrode rods 52, and the lower electric push rod 113 is electrically connected to the controller 12 through the lower electrode rod 103. The upper electric push rod 112 is electrically connected to the controller 12 through the upper electrode rod 52. The telescopic end of the upper electric push rod 112 is fixedly installed with an upper insulating block 114, and the end of the upper insulating block 114 is fixedly A conductive block 115 is fixedly installed, a lower insulating block 116 is fixedly installed on the telescopic end of the lower electric push rod 113, and a conductive column 117 is fixedly installed on the end of the lower insulating block 116, and the end of the conductive column 117 is in sliding contact with the side wall of the conductive block 115, and an electromagnetic switch 118 electrically connected to the conductive column 117 and the conductive block 115 is fixedly installed inside the insulating protection cover 111, and the electromagnetic switch 118 is electrically connected to the controller 12, and a travel switch or a proximity switch is installed on the telescopic end of the upper electric push rod 112 and the lower electric push rod 113. The controller 12 controls the working time of the upper electric push rod 112 and the lower electric push rod 113 according to the electrical signal output by the travel switch and the proximity switch during the return operation.

[0043] The controller 12 is fixedly mounted on the outer wall of the filter box 1, the upper detection unit 5, the energy storage unit 6, the suction mechanism 7, the lower detection unit 10 and the trigger mechanism 11 are all electrically connected to the controller 12, a push plate 13 is slidably provided above the filter 4, a connecting frame 14 is fixedly mounted on the top of the push plate 13, the side walls of the connecting frame 14 are slidably connected to the side walls of the filter box 1 and the protective cover 96, a connecting plate 15 is fixedly mounted on the bottom of the movable plate 99, and the connecting plate 15 is fixedly connected to the end of the connecting frame 14, and a discharge port and a cover plate (not shown in the figure) are reserved on the side wall of the filter box 1 at a position above the filter 4 for regularly cleaning impurities intercepted on the filter 4.

[0044] The operating principle of the present invention is described as follows: the battery-grade lithium carbonate mother liquor to be recovered is introduced into the filter box 1 through the liquid inlet pipe 3, and the solid particulate impurities in the mother liquor can be filtered and intercepted through the filter screen 4. The controller 12 is started to start the recovery of the battery-grade lithium carbonate mother liquor;

[0045] After the controller 12 is started, it will control the suction pump 71 to work. The suction pump 71 will extract the filtered mother liquid and input it into the hollow plate 61 through the infusion tube 72. At this time, the controller 12 controls the second electric control valve 66 to be energized and opened, and the mother liquid inside the hollow plate 61 will enter the upper insulating box 51 through the connecting pipe 65. After the second electric control valve 66 is energized and opened for 10 seconds, the controller 12 controls the second electric control valve 66 to be de-energized and closed, and at the same time controls the connection circuit between the two upper electrode rods 52 and the upper electric push rod 112 to be energized for 5 seconds. At this time, the upper electric push rod 112 is energized to work, thereby pushing the upper insulating block 114 to move upward. Subsequently, the controller 12 controls the first electric control valve 54 inside the upper tube 53 to be energized for 5 seconds (the inner diameter of the upper tube 53 is 100 mm). It can satisfy the requirement of discharging all the mother liquid in the upper insulating box 51 into the adsorption tank 2 within 5 seconds). At the same time, the third electric control valve 105 in the lower tube 101 is controlled to be energized for 10 seconds. When the mother liquid passes through the ion exchange resin filler 83 in the adsorption tank 2, the lithium ions in the mother liquid will be exchanged with the hydrogen ions on the ion exchange resin filler 83. Since the ion exchange resin filler 83 has a certain affinity for lithium ions, the lithium ions will be adsorbed on the resin, and the hydrogen ions on the resin will be released into the solution, so that the lithium ions can be adsorbed in the ion exchange resin filler 83. The mother liquid after passing through the ion exchange resin filler 83 will flow into the lower insulating box 102 through the lower tube 101. At this time, the controller 12 will control the lower insulating box 102. The connection circuit between the two lower electrode rods 103 and the lower electric push rod 113 is energized for 5 seconds at a fixed time, and the connection circuit between the conductive block 115, the conductive column 117 and the electromagnetic switch 118 is powered for 5 seconds at the same time. At this time, the lower electric push rod 113 will drive the lower insulating block 116 to move upward. Since the lithium ions in the mother liquid (lithium ions have strong conductivity) are exchanged and adsorbed, the conductivity of the mother liquid entering the lower insulating box 102 will be significantly reduced. At this time, the resistance of the mother liquid is large, so the current passing into the lower electric push rod 113 becomes smaller. Therefore, within the same time (5 seconds), the upward movement height of the lower insulating block 116 will be lower than the upward movement height of the upper insulating block 114, and the conductive column 117 is not in contact with the conductive block 115. Therefore, within 5 seconds, the electromagnetic switch The switch 118 will not close. At this time, the controller 12 controls the fourth electrically controlled valve 106 inside the drain pipe 104 to be powered on and opened, so that the mother liquid inside the lower insulating box 102 can be discharged into the corresponding pipeline. As the exchange between the ion exchange resin filler 83 and the lithium ions gradually reaches a saturated state, the ion exchange resin filler 83 cannot fully exchange lithium ions. At this time, since the ion concentration of the mother liquid before and after entering the adsorption tank 2 (i.e., entering the upper insulating box 51 and the lower insulating box 102) has not changed significantly, the conductivity of the mother liquid will not change significantly within the same 5 seconds. Therefore, the height to which the lower insulating block 116 is moved upward by the lower electric push rod 113 is similar to the height to which the upper insulating block 114 is moved upward. At this time,The conductive column 117 is in contact with the conductive block 115, so the controller 12 will receive the closing electrical signal of the electromagnetic switch 118. After receiving the closing electrical signal of the electromagnetic switch 118, the controller 12 will immediately control its own alarm module (such as a buzzer) to alarm and control the entire device to stop working. After receiving the alarm information from the controller 12, the staff should separate the bottom cover 81 from the adsorption tank 2 and replace the ion exchange resin filler 83 between the two baffles 82 (in order to facilitate the disassembly of the bottom cover 81, the connection between the drain pipe 104 and the external pipeline is connected through a hose to avoid affecting the disassembly of the bottom cover 81);

[0046] In the above working process, when the controller 12 controls the second electric control valve 66 to cut off the power, the mother liquid input into the hollow plate 61 by the suction pump 71 through the infusion tube 72 cannot be discharged through the connecting tube 65. At this time, the hydraulic pressure inside the hollow plate 61 increases. Under the action of the hydraulic pressure, the piston plate 62 will be pushed. The piston plate 62 will push the rack of the gear rack assembly 910 to move horizontally through the guide rod 63 and the movable plate 99. The rack will rotate the transmission rod 97 through the gear. Under the action of the chain assembly 98, the shaft 92 will rotate synchronously. After the first electric control valve 54 is powered on, the controller 12 will The second electric control valve 66 is controlled to be powered on and opened again. At this time, under the action of the spring 64, the piston plate 62 will immediately move back, so that the mother liquid inside the hollow plate 61 can be squeezed into the upper insulating box 51 through the connecting pipe 65 again. When the piston plate 62 moves back, the piston plate 62 will drive the rack of the gear rack assembly 910 to move back through the guide rod 63 and the movable plate 99. At this time, the transmission rod 97 will rotate the rotating shaft 92 through the chain assembly 98, so that the striking rod 93 can rotate quickly. When the striking rod 93 rotates, it can impact the mother liquid flowing down through the drainage hole 94, so that the mother liquid is exhausted as much as possible. It is possible to form a plurality of small droplets, thereby increasing the contact area between the mother liquid and the ion exchange resin filler 83, and relatively reducing the mass transfer resistance inside the mother liquid, so that the diffusion speed of lithium ions from the inside of the droplet to the droplet surface and from the droplet surface to the ion exchange resin filler 83 is accelerated, thereby improving the adsorption rate and sufficiency of lithium ions in the mother liquid (wherein, during the process of the first electric control valve 54 being powered on and opened, since there is already a lot of mother liquid inside the hollow plate 61 at this time, the hydraulic pressure inside the hollow plate 61 is large, and the length of the spring 64 being compressed is long, the displacement of the piston plate 62 is The moving speed slows down. At this time, each liquid baffle plate 95 is located above each drainage hole 94, and blocks the mother liquid from flowing out directly through the drainage hole 94 as much as possible. When the second electric control valve 66 is energized, under the release of the spring 64, the shaft 92 will rotate quickly. After the liquid baffle plate 95 is staggered from the drainage hole 94, the mother liquid flows down through the drainage hole 94, and the striking rod 93 will strike the flowing mother liquid. In this way, it can be avoided that a large amount of mother liquid flows directly through the drainage hole 94 before the striking rod 93 starts to rotate during the process of the first electric control valve 54 being energized, thereby ensuring the striking rod 93 has a good effect of breaking up the mother liquid);

[0047] At the same time, when the piston plate 62 moves, it will make the push plate 13 move synchronously through the guide rod 63, the movable plate 99, the connecting plate 15 and the connecting frame 14. Under the action of the movement of the push plate 13, the impurities intercepted on the surface of the filter screen 4 will be pushed to one side, so that at least a part of the surface of the filter screen 4 is retained without being blocked by impurities, ensuring that the filter screen 4 continues to filter and intercept the mother liquid;

[0048] Among them, after the timed power-on of the connection circuit between the lower electric push rod 113 and the lower electrode rod 103 ends, the controller 12 will control the upper electric push rod 112 and the lower electric push rod 113 to perform return work (travel switches or proximity switches are installed on the telescopic ends of the upper electric push rod 112 and the lower electric push rod 113, and the controller 12 controls the working time of the upper electric push rod 112 and the lower electric push rod 113 according to the electrical signals output by the travel switches and the proximity switches during the return work), so that the upper insulating block 114 and the lower insulating block 116 move back and reset, and then continue to repeat the above work.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery-grade lithium carbonate precipitation mother liquor recovery device, comprising a filter box (1) and an adsorption tank (2) arranged on one side of the filter box (1), characterized in that: Also includes: A liquid inlet pipe (3) is fixedly inserted into the upper end of the side wall of the filter box (1), and a filter screen (4) is fixedly installed on the inner wall of the filter box (1) at a position below the liquid inlet pipe (3); An upper detection unit (5) fixedly connected to the top of the adsorption tank (2); An energy storage unit (6) is arranged on the top of the filter box (1) and is connected to the upper detection unit (5); A suction mechanism (7) is arranged on a side wall of the filter box (1) and is connected to the energy storage unit (6); An ion exchange unit (8) is arranged inside the adsorption tank (2); The scattering mechanism (9) is arranged above the ion exchange unit (8) and is drivingly connected to the energy storage unit (6); A lower detection unit (10) is arranged below the adsorption tank (2) and is connected to the interior of the adsorption tank (2); A trigger mechanism (11) is arranged between the adsorption tank (2) and the filter box (1), and is electrically connected to the upper detection unit (5) and the lower detection unit (10); A controller (12) is fixedly mounted on the outer wall of the filter box (1); the upper detection unit (5), the energy storage unit (6), the suction mechanism (7), the lower detection unit (10) and the trigger mechanism (11) are all electrically connected to the controller (12); The energy storage unit (6) comprises a hollow plate (61) fixedly mounted on the top of the filter box (1); a piston plate (62) is slidably mounted inside the hollow plate (61); a plurality of guide rods (63) are fixedly mounted on the side wall of the piston plate (62); each guide rod (63) is slidably connected to the side wall of the hollow plate (61) away from the piston plate (62); a group of springs (64) are fixedly mounted between the piston plate (62) and the inner wall of the hollow plate (61); a connecting pipe (65) is fixedly plugged into the top of the hollow plate (61) at a position on the side of the piston plate (62) away from the guide rods (63); a second electric control valve (66) electrically connected to the controller (12) is fixedly mounted inside the connecting pipe (65); The ion exchange unit (8) comprises a bottom cover (81) detachably mounted on the bottom of the adsorption tank (2); a baffle (82) is fixedly mounted inside the bottom cover (81) and the adsorption tank (2); and ion exchange resin fillers (83) are filled between the baffles (82); The dispersing mechanism (9) comprises a fixed plate (91) fixedly mounted inside the adsorption tank (2) and located above the baffle (82); a rotating shaft (92) is rotatably mounted at the bottom of the fixed plate (91); and a plurality of evenly distributed striking rods (93) are fixedly mounted on the shaft wall of the rotating shaft (92); a liquid discharge hole (94) is formed on the end surface of the fixed plate (91) located above each striking rod (93); a liquid baffle plate (95) is disposed above each of the liquid discharge holes (94); and one end of each of the liquid baffle plates (95) is fixedly connected to the rotating shaft (92); and each of the liquid baffle plates (95) is fixedly mounted on the rotating shaft (92). (95) are staggered with each striking rod (93), a protective cover (96) is fixedly installed on the upper end of the outer wall of the adsorption tank (2), a transmission rod (97) is rotatably provided inside the protective cover (96), and the transmission rod (97) is connected to the rotating shaft (92) through a chain assembly (98), each of the guide rods (63) is slidably connected to the side wall of the protective cover (96), and a movable plate (99) is fixedly connected to the rod end of each guide rod (63), and the movable plate (99) is connected to the transmission rod (97) through a gear rack assembly (910); A push plate (13) is slidably mounted above the filter screen (4), a connecting frame (14) is fixedly mounted on the top of the push plate (13), the side walls of the connecting frame (14) are slidably connected to the side walls of the filter box (1) and the protective cover (96), a connecting plate (15) is fixedly mounted on the bottom of the movable plate (99), and the connecting plate (15) is fixedly connected to the end of the connecting frame (14).

2. A battery-grade lithium carbonate precipitation mother liquor recovery device according to claim 1, characterized in that: The upper detection unit (5) comprises an upper insulating box (51) arranged above the adsorption tank (2); two upper electrode rods (52) electrically connected to the controller (12) are fixedly plugged into the end surface of the upper insulating box (51); the conductive parts of the two upper electrode rods (52) are arranged inside the upper insulating box (51); an upper tube (53) is fixedly connected between the bottom of the upper insulating box (51) and the adsorption tank (2); a first electrically controlled valve (54) electrically connected to the controller (12) is installed inside the upper tube (53); and the connecting tube (65) is fixedly connected to the upper insulating box (51).

3. A battery-grade lithium carbonate precipitation mother liquor recovery device according to claim 1, characterized in that, The suction mechanism (7) comprises a suction pump (71) fixedly mounted on the lower end of the outer wall of the filter box (1), and the suction end of the suction pump (71) is connected to the interior of the filter box (1), and a liquid delivery tube (72) is fixedly plugged into the liquid outlet end of the suction pump (71) and the hollow plate (61), and the suction pump (71) is electrically connected to the controller (12).

4. A battery-grade lithium carbonate precipitation mother liquor recovery device according to claim 1, characterized in that: The lower detection unit (10) comprises a lower tube (101) fixedly plugged into the bottom of the bottom cover (81); the lower tube (101) is fixedly connected to a lower insulating box (102); two lower electrode rods (103) electrically connected to a controller (12) are fixedly plugged into the end surface of the lower insulating box (102); the conductive parts of the two lower electrode rods (103) are both arranged inside the lower insulating box (102); a liquid discharge pipe (104) is fixedly plugged into the bottom of the lower insulating box (102); a third electrically controlled valve (105) is installed inside the lower tube (101); a fourth electrically controlled valve (106) is installed inside the liquid discharge pipe (104); and both the third electrically controlled valve (105) and the fourth electrically controlled valve (106) are electrically connected to the controller (12).

5. A battery-grade lithium carbonate precipitation mother liquor recovery device according to claim 4, characterized in that: The trigger mechanism (11) comprises an insulating protective cover (111) fixedly arranged between the filter box (1) and the adsorption tank (2), and an upper electric push rod (112) and a lower electric push rod (113) are fixedly installed inside the insulating protective cover (111), the upper electric push rod (112) is electrically connected to the controller (12) via two upper electrode rods (52), the lower electric push rod (113) is electrically connected to the controller (12) via the lower electrode rod (103), the upper electric push rod (112) is electrically connected to the controller (12) via the upper electrode rod (52), and the extension and retraction of the upper electric push rod (112) An upper insulating block (114) is fixedly mounted on the end of the lower electric push rod (113), and a conductive block (115) is fixedly mounted on the end of the upper insulating block (114); a lower insulating block (116) is fixedly mounted on the telescopic end of the lower electric push rod (113), and a conductive column (117) is fixedly mounted on the end of the lower insulating block (116); the end of the conductive column (117) is in sliding contact with the side wall of the conductive block (115); an electromagnetic switch (118) electrically connected to the conductive column (117) and the conductive block (115) is fixedly mounted inside the insulating protective cover (111); and the electromagnetic switch (118) is electrically connected to the controller (12).

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