All-vanadium redox flow battery recycling and utilization device

Abstract

The present invention discloses a recycling and reuse device for all-vanadium liquid flow batteries, which relates to the technical field of liquid flow battery recycling, including a material barrel, and also including: a separation barrel, which is connected to the material barrel through a connecting pipe; a piston assembly, which is arranged inside the separation barrel, and is used to extract the electrolyte in the material barrel into the separation barrel, and discharge it after filtering; a slag discharge assembly, which is arranged at one end of the separation barrel, and is used to discharge the filter residue, and the piston assembly can drive the slag discharge assembly to operate; a driving assembly, which is used to drive the piston assembly to reciprocate inside the separation barrel. The present invention can achieve the effect of integrating the extraction, filtration and slag discharge of the electrolyte by providing the piston assembly and slag discharge assembly, and can achieve the effect of filtering and separating the recovered electrolyte, and can also achieve the effect of slag discharge without stopping the machine, thereby achieving the effect of continuous production and improving the recovery efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid flow battery recycling, in particular to an all-vanadium liquid flow battery recycling and utilization device. Background Art

[0002] The all-vanadium flow battery is a redox battery with vanadium as the active material in a circulating liquid state. The electrical energy of the vanadium battery is stored in the form of chemical energy in a sulfuric acid electrolyte containing vanadium ions of different valences. The electrolyte is pumped into the battery stack by an external pump. Under the action of mechanical power, it circulates in a closed loop of different liquid storage tanks and half-cells. The current is collected and conducted through the double electrode plates, thereby converting the chemical energy stored in the solution into electrical energy. After the all-vanadium flow battery is discarded, in order to avoid wasting resources, the electrolyte of the all-vanadium flow battery needs to be recycled. The following reactions occur during the charge and discharge process of the all-vanadium flow battery: Positive electrode: VO 2+ +H2O→VO2 + +2H + +e - , negative electrode: V 3+ +e - →V 2+ Due to the mutual cross-talk of vanadium ions and the continuous occurrence of side reactions, after long-term operation of the battery, the concentration and valence of the positive and negative electrode electrolytes are seriously unbalanced, and the concentration drops significantly. A large amount of V5+ remains in the positive electrode or a large amount of V2+ remains in the negative electrode, which seriously affects the performance of the battery and makes the electrolyte unreusable. In addition, due to the imbalance of electrolyte concentration, the vanadium dioxide crystals produced by the reaction cannot be decomposed, which has a certain impact on the recycling and utilization of the electrolyte.

[0003] For example, in the field of liquid flow battery application technology, the publication number CN212587534U discloses an all-vanadium liquid flow battery electrolyte recovery optimization device, comprising a bottom plate, the bottom of the bottom plate is rotatably connected to four universal wheels, the right side of the top of the bottom plate is fixedly connected to a push rack, the top of the bottom plate is fixedly connected to a temporary container, the bottom of the right side of the temporary container is fixedly connected to a drain pipe, the right end of the drain pipe is fixedly installed with a drain valve, the top of the temporary container is fixedly installed with a liquid pump, the output end on the right side of the liquid pump is fixedly connected to a liquid outlet pipe, and the input end on the left side of the liquid pump is fixedly connected to a liquid inlet pipe. The all-vanadium liquid flow battery electrolyte recovery optimization device has a streamlined overall structure and is convenient for multi-directional recovery of electrolyte in the electrolytic cell. It is easy to operate and has good practicality, thereby effectively solving the problem of manual recovery of electrolyte in the electrolytic cell being time-consuming and prone to waste.

[0004] The above technical solution has some problems in practical application. When recycling the electrolyte of the all-vanadium redox flow battery, this technical solution cannot separate the vanadium dioxide crystals in the electrolyte, which is not conducive to the recycling of the electrolyte.

[0005] Therefore, it is necessary to invent a vanadium liquid flow battery recycling and utilization device to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a vanadium redox flow battery recycling and utilization device to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a vanadium redox flow battery recycling and utilization device, comprising a material barrel, and further comprising:

[0008] A separation barrel connected to the material barrel through a connecting pipe;

[0009] The piston assembly is arranged inside the separation barrel and is used to draw the electrolyte in the material barrel into the separation barrel and discharge it after filtering;

[0010] A slag discharge assembly is provided at one end of the separation barrel and is used to discharge the filter residue. The piston assembly can drive the slag discharge assembly to operate;

[0011] A driving assembly, which is used to drive the piston assembly to reciprocate inside the separation barrel;

[0012] The piston assembly includes a piston head and a filter screen, wherein the filter screen is arranged on one end of the piston head close to the slag discharge assembly;

[0013] The piston head is provided with a flow guide component for liquid to pass through the piston head in one direction.

[0014] Preferably, the guide assembly includes a guide groove, a movable plug and a movable seat. The movable seat is fixedly arranged at one end of the movable plug. The guide groove is opened on the end face of the piston head away from the filter screen and passes through the piston head. There are multiple guide grooves. The movable plug is inserted into the guide groove under the action of the reset assembly. The number of the movable plugs is the same as the guide groove and corresponds one to one.

[0015] Preferably, the reset assembly includes a sliding sleeve and a sliding rod, the sliding sleeve is fixedly mounted on the outer side of the movable seat, the sliding rod is fixedly mounted on an end surface of the piston head away from the filter screen, the sliding sleeve is slidably arranged on the sliding rod, and a reset spring is mounted around the outer side of the sliding rod.

[0016] Preferably, the flow guide assembly further comprises a plurality of flow guide sleeves of annular structure installed in the piston head, and the plurality of flow guide sleeves are staggered with the plurality of flow guide grooves, and the inner side wall of the flow guide sleeve is provided with a spiral groove, and the flow guide sleeve is located between the filter screen and the movable plug;

[0017] The filter screen is provided with a plurality of filter holes, and one end of each of the filter holes is fixedly provided with a filter tip having a cone structure.

[0018] Preferably, the slag discharge assembly includes a fixed cylinder, one end of the fixed cylinder is fixedly connected to one end of the separation barrel, and the two are communicated, and a residue discharge pipe and a liquid discharge pipe are fixedly provided at the lower part of the fixed cylinder, and both are located on the fixed cylinder close to the separation barrel, and the liquid discharge pipe is closer to the separation barrel than the residue discharge pipe, and a filter plate is fixedly provided at the top of the liquid discharge pipe.

[0019] Preferably, the slag discharge assembly also includes a push cylinder, a discharge port is opened at the bottom of the push cylinder, and the discharge port is located on the push cylinder close to the separation barrel. The push cylinder is slidably arranged in the fixed cylinder, and the push cylinder leans against the inner end of the fixed cylinder through an elastic member. The inner diameter of the push cylinder is the same as the inner diameter of the separation barrel. A second baffle is fixedly arranged at the bottom of one side of the push cylinder away from the separation barrel, and a push rod is fixedly arranged on the other side.

[0020] Preferably, the slag discharge assembly further includes a one-way air valve and a solenoid valve. The one-way air valve is fixedly arranged on the other end face of the fixed cylinder. The one-way air valve only allows air to enter the fixed cylinder. The solenoid valve is fixedly arranged at the center of the push cylinder.

[0021] Preferably, the slag discharge assembly further comprises a switch for controlling the opening and closing of the solenoid valve, the switch being fixedly mounted on the bottom of the end face of the fixed cylinder away from the separation barrel, and a push rod being fixedly provided on the end of the second baffle away from the push cylinder.

[0022] Preferably, the driving assembly includes a piston rod, which is slidably arranged in the middle of the other end of the separation barrel, one end of the piston rod located inside the separation barrel is fixedly connected to the piston head, and the other end is outside the separation barrel, and the separation barrel, piston assembly and slag discharge assembly are each provided in two groups and are symmetrically arranged;

[0023] The driving assembly also includes a connecting seat, a transmission arm and a transmission block. The middle part of the transmission block is a square slider, and fixed shafts are fixed on both sides of the connecting seat. There are two connecting seats and two transmission arms. The two connecting seats are respectively fixedly installed on one end of the two piston rods. One end of the two transmission arms is rotatably connected to the two connecting seats, and the other end is rotatably connected to the two fixed shafts of the transmission block. A guide rail is fixedly provided on the bottom surface of the material barrel, and the square slider of the transmission block is slidably arranged inside the guide rail.

[0024] Preferably, the driving assembly also includes a slide rail and a driving motor, the slide rail is fixedly mounted on the end of one of the fixed shafts on the transmission block, a slide groove is opened in the middle of the slide rail, the driving motor is fixedly mounted on the bottom end of the material barrel, the output shaft of the driving motor is fixedly mounted with a transmission disk, an extension arm is fixedly mounted on the outer side of the transmission disk, a slider is rotatably mounted on the end of the extension arm away from the output shaft, and the slider is slidably set in the slide groove.

[0025] Technical effects and advantages of the present invention:

[0026] 1. The piston assembly and slag discharge assembly provided in the present invention can realize the effects of integrating electrolyte extraction, filtration and slag discharge, and can achieve the effect of filtering and separating the recovered electrolyte, while also achieving the effect of slag discharge without stopping the machine, thereby achieving the effect of continuous production and improving the recovery efficiency;

[0027] 2. The present invention provides multiple flow guide sleeves inside the piston head, and the flow guide sleeves are provided with spiral grooves inside. The spiral structure of the grooves can guide the electrolyte passing through the flow guide grooves, causing the electrolyte to produce a certain degree of spiral motion. By providing multiple conical filter tips on the outside of the filter, the conical structure design makes it difficult for vanadium dioxide crystals to clog the filter holes during the filtration process. In addition, the flow rate of the electrolyte is increased after being guided by the grooves. The electrolyte with an increased flow rate can pass through the filter holes and the filter tip more quickly, thereby flushing off the vanadium dioxide crystals attached to the filter tip, facilitating the discharge of the vanadium dioxide crystals and subsequent separation operations.

[0028] 3. The present invention can generate compressed gas during operation by providing a fixed cylinder and a push cylinder. The compressed gas can be used to clean the discharge port, reducing the possibility of residue residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention.

[0031] Figure 3 Schematic diagram of the structure of the driving component in the present invention.

[0032] Figure 4 It is a schematic cross-sectional view of the local structure of the present invention.

[0033] Figure 5 It is a schematic diagram of the cross-sectional structure of the slag discharge assembly in the present invention.

[0034] Figure 6 It is a structural schematic diagram of the push cylinder in the present invention.

[0035] Figure 7 It is a structural schematic diagram of the fixed cylinder in the present invention.

[0036] Figure 8 It is a schematic diagram of the state structure of the slag discharge component of the present invention during slag discharge.

[0037] Figure 9 It is a structural schematic diagram of the piston head and filter screen in the present invention.

[0038] Figure 10 It is a structural schematic diagram of the piston head in the present invention.

[0039] Figure 11 It is a schematic diagram of the partial cross-sectional structure of the piston head in the present invention.

[0040] Figure 12 For the present invention Figure 11 Enlarged structural diagram at point A in the middle.

[0041] In the figure: 1, material barrel; 2, separation barrel; 3, connecting pipe; 4, filter residue discharge pipe; 5, filtrate discharge pipe; 6, drive assembly; 7, guide tube; 8, first baffle; 9, discharge pipe; 11, feed pipe; 21, piston head; 211, guide groove; 212, movable plug; 213, movable seat; 214, sliding sleeve; 215, sliding rod; 216, guide sleeve; 217, groove; 22, fixed cylinder; 221, one-way air valve; 222, elastic member; 2 23. Solenoid valve; 224. Push cylinder; 225. Push rod; 226. Discharge port; 227. Second baffle; 2281. Push rod; 2282. Switch; 229. Filter plate; 23. Filter screen; 231. Filter tip; 61. Piston rod; 62. Connecting seat; 63. Transmission arm; 64. Transmission block; 641. Guide rail; 65. Slide rail; 651. Slide chute; 66. Drive motor; 661. Transmission disc; 662. Extension arm; 663. Slider. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0043] The present invention provides Figures 1 to 12 The all-vanadium redox flow battery recycling and utilization device shown includes a material barrel 1 and a separation barrel 2 , which is connected to the material barrel 1 through a connecting pipe 3 .

[0044] The piston assembly is arranged inside the separation barrel 2 and is used to draw the electrolyte in the material barrel 1 into the separation barrel 2 and discharge it after filtering.

[0045] The slag discharge assembly is arranged at one end of the separation barrel 2 and is used to discharge the filter residue. The piston assembly can drive the slag discharge assembly to operate.

[0046] The driving assembly 6 is used to drive the piston assembly to reciprocate inside the separation barrel 2.

[0047] The piston assembly includes a piston head 21 and a filter screen 23 . The filter screen 23 is arranged on one end of the piston head 21 close to the slag discharge assembly.

[0048] The piston head 21 is provided with a flow guide assembly for allowing liquid to pass through the piston head 21 in one direction.

[0049] In a specific embodiment of the present invention, the material barrel 1 is used to temporarily recover and store the electrolyte, and the vanadium dioxide crystals in the electrolyte can be precipitated inside the material barrel 1; the piston assembly can reciprocate in the separation barrel 2 under the drive of the driving assembly 6, and the following effects can be produced during the reciprocating motion of the piston assembly: 1. The electrolyte can be extracted from the material barrel 1 into the separation barrel 2; 2. The electrolyte can be filtered and the filtrate can be discharged; 3. The slag discharge assembly can be driven to automatically discharge the filtered vanadium dioxide crystals, thereby realizing the continuous extraction, filtering and slag discharge working process, and then the effect of discharging the filter residue can be achieved without stopping the machine, thereby improving work efficiency.

[0050] The driving assembly 6 is used to provide power output for the piston assembly, so that the piston assembly can reciprocate in the separation barrel 2.

[0051] In this embodiment, a bracket is also included. The material barrel 1 is fixedly arranged on the top of the bracket. A feed pipe 11 is provided on the top of the material barrel 1, and the electrolyte to be recovered can be pumped into the material barrel 1 from the feed pipe 11. The separation barrel 2 is fixedly arranged on the upper side of the bracket and is located at the lower part of the material barrel 1; one end of the connecting pipe 3 is fixedly connected to the bottom of the material barrel 1, and the other end of the connecting pipe 3 is fixedly arranged at the upper part of the separation barrel 2 close to the slag discharge component, and the connecting pipe 3 connects the material barrel 1 and the separation barrel 2. A one-way valve is still provided on the connecting pipe 3, which can only allow the electrolyte in the material barrel 1 to enter the separation barrel 2; a filtrate discharge pipe 5 is fixedly provided at a position at the lower part of the separation barrel 2 away from the slag discharge component. The filtrate discharge pipe 5 is connected to the separation barrel 2, and a one-way valve is also provided on the filtrate discharge pipe 5. The one-way valve can only allow the liquid in the separation barrel 2 to enter the filtrate discharge pipe 5 and cannot flow in the opposite direction.

[0052] The guide assembly includes a guide groove 211, a movable plug 212 and a movable seat 213. The movable seat 213 is fixedly arranged at one end of the movable plug 212. The guide groove 211 is opened on the end surface of the piston head 21 away from the filter 23 and passes through the piston head 21. There are multiple guide grooves 211. The movable plug 212 is inserted into the guide groove 211 under the action of the reset assembly. The number of movable plugs 212 is the same as that of the guide grooves 211, and they correspond one to one.

[0053] Under normal circumstances, the movable plug 212 is always inserted in the guide groove 211 under the action of the reset component, which is used to close the guide groove 211, and due to the setting of the movable seat 213, the movable plug 212 cannot pass through the guide groove 211; when in use, when the piston head 21 moves from a position close to the slag discharge component to a direction away from the slag discharge component, and under the action of the reset component, the movable plug 212 cannot be opened. At this time, the piston head 21 only acts as a piston, and negative pressure is generated when it moves, which can draw the electrolyte in the material barrel 1 into the separation barrel 2. Then, when the piston head 21 moves in the opposite direction, the electrolyte in the separation barrel 2 near the discharge The space in the slag assembly is filled with electrolyte, so when the piston head 21 moves in the opposite direction, the electrolyte can pass through the filter mesh 23 under pressure to complete the filtration, and the filtrate can push open the movable plug 212, and then the filtrate enters the other side of the piston head 21, that is, the space in the separation barrel 2 near the filtrate discharge pipe 5, and then the piston head 21 moves in the opposite direction again to extract the electrolyte into the separation barrel 2 again, and at the same time push the filtrate into the filtrate discharge pipe 5 for discharge. In this way, through the reciprocating motion of the piston assembly, it is possible to not only extract the electrolyte into the separation barrel 2, but also filter and discharge the electrolyte.

[0054] When the piston head 21 moves toward the slag discharge assembly, after the piston head 21 passes through the connecting pipe 3, in order to avoid extracting the electrolyte into the separation barrel 2 at this time, a first baffle 8 can be fixedly provided on the upper part of the piston head 21 to close the interface between the connecting pipe 3 and the separation barrel 2, that is, when the piston head 21 moves toward the slag discharge assembly, the piston head 21 is blocked by the first baffle 8 after passing through the interface, preventing new electrolyte from entering the separation barrel 2 from the material barrel 1.

[0055] The reset assembly includes a sleeve 214 and a slide rod 215. The sleeve 214 is fixedly mounted on the outer side of the movable seat 213, and the slide rod 215 is fixedly mounted on the end surface of the piston head 21 away from the filter screen 23. The sleeve 214 is slidably arranged on the slide rod 215, and a reset spring is installed around the outer side of the slide rod 215; one end of the reset spring is fixedly connected to the end of the slide rod 215, and the other end is pressed against the sleeve 214. The reset spring is used to apply pressure to the sleeve 214, so that the sleeve 214 is attached to the piston head 21, and then the movable seat 213 is attached to the piston head 21, so that the movable plug 212 can be inserted into the guide groove 211; when the movable plug 212 is subjected to pressure, it will overcome the pressure applied by the reset spring and move, so that the movable plug 212 is separated from the guide groove 211 and the filtrate passes through the guide groove 211.

[0056] The flow guide assembly also includes multiple annular flow guide sleeves 216 installed in the piston head 21, and the multiple flow guide sleeves 216 are staggered with the multiple flow guide grooves 211. The inner wall of the flow guide sleeve 216 is provided with a spiral structure groove 217. The flow guide sleeve 216 is located between the filter screen 23 and the movable plug 212.

[0057] The filter screen 23 is provided with a plurality of filter holes, and one end of each of the filter holes is fixedly provided with a filter tip 231 having a conical structure. The design of the conical structure can reduce the probability of vanadium dioxide crystals clogging the filter holes.

[0058] The design of the spiral structure can guide the electrolyte passing through the guide groove 211, so that the electrolyte produces a certain degree of spiral motion, thereby improving the efficiency of the electrolyte passing through the filter holes.

[0059] The slag discharge assembly includes a fixed cylinder 22, one end of which is fixedly connected to one end of the separation barrel 2, and the two are in communication. A residue discharge pipe 4 and a liquid discharge pipe 9 are fixedly provided at the lower portion of the fixed cylinder 22, and both are located on the fixed cylinder 22 near the separation barrel 2, with the liquid discharge pipe 9 being closer to the separation barrel 2 than the residue discharge pipe 4. A filter plate 229 is fixedly provided at the top of the liquid discharge pipe 9. A conduit 7 is fixedly provided at the bottom of the liquid discharge pipe 9, one end of which is fixedly connected to the liquid discharge pipe 9, and the other end is fixedly connected to the outlet of the filtrate discharge pipe 5. The conduit 7 is used to connect the liquid discharge pipe 9 and the filtrate discharge pipe 5.

[0060] The filter residue discharge pipe 4 is used to discharge the filter residue after filtration, and the liquid discharge pipe 9 is used to discharge the residual liquid. The residual liquid refers to the electrolyte that has not passed through the piston head 21. When the residual liquid is discharged, it is filtered through the filter plate 229. The filtered filtrate enters the filtrate discharge pipe 5 through the conduit 7, and is discharged together with the filtrate filtered by the piston assembly.

[0061] The slag discharge assembly also includes a push tube 224, which has a discharge port 226 at its bottom. The discharge port 226 is located on the push tube 224 near the separation barrel 2. The push tube 224 is slidably arranged in the fixed tube 22. The push tube 224 leans against the inner end of the fixed tube 22 via an elastic member 222. The inner diameter of the push tube 224 is the same as the inner diameter of the separation barrel 2. A second baffle 227 is fixedly provided at the bottom of one side of the push tube 224 away from the separation barrel 2, and a push rod 225 is fixedly provided on the other side. The elastic member 222 and the second baffle 227 are located in the same space, which is not connected to the separation barrel 2. The elastic member 222 applies a thrust to the push tube 224, so that the push tube 224 can lean against the inner end of the fixed tube 22, which is close to the separation barrel 2. At this time, the middle position of the bottom of the push tube 224 is located at the filter plate 229, sealing the filter plate 229. The elastic member 222 can be a spring.

[0062] Under normal conditions, the push cylinder 224 rests against the inner end of the fixed cylinder 22 under the force of the elastic member 222. When the piston head 21 moves to the connection position between the fixed cylinder 22 and the separation barrel 2, the filter screen 23 on the piston head 21 can contact the push rod 225. Then, under the push of the piston head 21, the push cylinder 224 can overcome the force of the elastic member 222 and move in a direction away from the separation barrel 2. In this state, a certain liquid storage space is formed between the push cylinder 224 and the piston head 21. This liquid storage space will store a portion of residual liquid. This portion of liquid can allow the solids filtered by the filter screen 23 to be soaked in it without directly sticking to the filter screen 23, which can effectively prevent the filtered solids from blocking the filter screen 23. The solid-liquid mixture in this liquid storage space will also be further processed and separated later.

[0063] When the push cylinder 224 moves in the direction away from the separation barrel 2, the discharge port 226 thereon will pass through the filter plate 229. When the discharge port 226 passes through the filter plate 229, the residual liquid will flow downward through the filter plate 229 into the drain pipe 9 under the action of gravity, while the vanadium dioxide crystals will remain on the filter plate 229 and be located in the discharge port 226. The push cylinder 224 continues to move, and the vanadium dioxide crystals will be taken away with the movement of the push cylinder 224. Then, when the discharge port 226 passes through the filter residue discharge pipe 4, the vanadium dioxide crystals fall into the filter residue discharge pipe 4 and are then discharged. When the piston head 21 returns, the push cylinder 224 is reset under the action of the elastic member 222.

[0064] The slag discharge assembly also includes a one-way air valve 221 and a solenoid valve 223. The one-way air valve 221 is fixedly arranged on the other end face of the fixed cylinder 22. The one-way air valve 221 only allows air to enter the fixed cylinder 22. The solenoid valve 223 is fixedly arranged at the center of the push cylinder 224.

[0065] The one-way air valve 221 is provided to allow air to enter when the push cylinder 224 is reset, thereby facilitating the reset of the push cylinder 224 . Under normal circumstances, the electromagnetic valve 223 is in a closed state.

[0066] The slag discharge assembly also includes a switch 2282 for controlling the opening and closing of the solenoid valve 223. The switch 2282 is fixedly installed at the bottom of the end surface of the fixed cylinder 22 away from the separation barrel 2. A push rod 2281 is fixedly provided on the end of the second baffle 227 away from the push cylinder 224.

[0067] In this embodiment, when the push cylinder 224 moves in the direction away from the separation barrel 2, and the discharge port 226 has passed the filter plate 229, the second baffle 227 will seal the interface between the filter residue discharge pipe 4 and the fixed cylinder 22, and the space where the elastic member 222 is located is a closed space. At this time, the push cylinder 224 will compress the gas there when it continues to move. When the discharge port 226 is located directly above the filter residue discharge pipe 4, the push rod 2282 triggers the switch 2281, causing the solenoid valve 223 to open, and then the compressed gas will be instantly released from the solenoid valve 223 into the space formed by the push cylinder 224 and the piston head 21. Since the discharge port 226 is located above the filter residue discharge pipe 4 at this time, the gas will burst out from here, thereby cleaning the discharge port 226 and avoiding residual filter residue at the discharge port 226.

[0068] The driving assembly 6 includes a piston rod 61, which is slidably arranged in the middle of the other end of the separation barrel 2. One end of the piston rod 61 is located inside the separation barrel 2 and is fixedly connected to the piston head 21, and the other end is outside the separation barrel 2. The separation barrel 2, the piston assembly and the slag discharge assembly are each provided with two groups, and are symmetrically arranged.

[0069] The driving assembly 6 also includes a connecting seat 62, a transmission arm 63 and a transmission block 64. The middle part of the transmission block 64 is a square slider, and fixed shafts are fixed on both sides of it. There are two connecting seats 62 and two transmission arms 63. The two connecting seats 62 are respectively fixedly installed on one end of the two piston rods 61. One end of the two transmission arms 63 is rotatably connected to the two connecting seats 62, and the other end is rotatably connected to the two fixed shafts of the transmission block 64. A guide rail 641 is fixedly provided on the bottom surface of the material barrel 1, and the square slider of the transmission block 64 is slidably set inside the guide rail 641.

[0070] The driving assembly 6 also includes a slide rail 65 and a driving motor 66. The slide rail 65 is fixedly installed on the end of one of the fixed shafts on the transmission block 64. A slide groove 651 is opened in the middle of the slide rail 65. The driving motor 66 is fixedly installed on the bottom end of the material barrel 1. The output shaft of the driving motor 66 is fixedly installed with a transmission disk 661. The outer side of the transmission disk 661 is fixedly installed with an extension arm 662. The end of the extension arm 662 away from the output shaft is rotatably installed with a slider 663, and the slider 663 is slidably set in the slide groove 651.

[0071] When the drive assembly 6 is in use, the drive motor 66 is started, and the output shaft of the drive motor 66 drives the transmission disk 661 to rotate, and then the extension arm 662 rotates, thereby changing the up and down position of the slider 663, and then the lower rail 65 can move up and down under the guidance of the transmission block 64 and the guide rail 641, so that the transmission block 64 can move up and down with the end of the transmission arm 63, thereby realizing the horizontal reciprocating motion of the piston rod 61, so that the drive assembly 6 can drive the piston head 21 to reciprocate in the separation barrel 2.

[0072] Working process: First, the piston head 21 is located near the fixed cylinder 22. Driven by the driving assembly 6, the piston head 21 starts to reciprocate, first moving away from the fixed cylinder 22. At this time, the guide groove 211 of the piston head 21 is in a closed state, and the piston head 21 only acts as a piston. At this time, the electrolyte in the material barrel 1 can be extracted into the separation barrel 2. At this time, the electrolyte is located between the push cylinder 224 and the piston head 21; when the piston head 21 reaches the end of the stroke, it moves in the opposite direction, at this time moving towards the fixed cylinder 22. , during which the electrolyte is squeezed by the push cylinder 224 and the piston head 21, and then the electrolyte is filtered through the filter screen 23 and pushes open the movable plug 212, and then passes through the guide groove 211. The filtrate after passing through the guide groove 211 enters the space in the separation barrel 2 near the filtrate discharge pipe 5; it should be noted that, by selecting the elastic coefficient of the elastic member 222, during the above-mentioned filtration process, the elastic member 222 will not be compressed and the push cylinder 224 will not move, which can ensure the normal progress of the above-mentioned filtration work. As the piston head 21 continues to move, the filter screen 23 will contact the push rod 225, and then the push cylinder 224 will be pushed by the piston head 21 to overcome the force of the elastic member 222 and move in the direction away from the separation barrel 2 (at this time, the residual liquid between the push cylinder 224 and the piston head 21 will no longer pass through the piston head 21). When the discharge port 226 on the push cylinder 224 passes through the filter plate 229, the residual liquid will be filtered through the filter plate 229, and the filtrate will enter the drain pipe 9, and then be discharged into the filtrate discharge pipe 5 through the conduit 7 and then discharged, while the filter residue will remain on the filter plate 229 and be located in the discharge port 226; the push cylinder 224 continues to move, and after the discharge port 226 passes through the filter plate 229, the second baffle 227 begins to block the interface between the filter residue discharge pipe 4 and the separation barrel 2. At this time, the gas in the space where the elastic member 222 is located is compressed. When the discharge port 22 6 When passing through the filter residue discharge pipe 4, the filter residue falls into the filter residue discharge pipe 4 and is discharged. When the discharge port 226 is located just above the filter residue discharge pipe 4, the push rod 2281 triggers the switch 2282 to open the electromagnetic valve 223. Then the compressed gas will instantly enter the space formed by the push cylinder 224 and the piston head 21 from the electromagnetic valve 223 and be discharged from the discharge port 226 to flush the discharge port 226 and prevent residue from being left at the discharge port 226. Then the piston head 21 will move in the opposite direction, and the push cylinder 224 will also be reset under the action of the elastic member 222. When the piston head 21 moves in the opposite direction, it can push the filtrate in the separation barrel 2 into the filtrate discharge pipe 5 for discharge, and at the same time extract new electrolyte into the separation barrel 2. Then the cycle is repeated, which can realize the continuity of extraction, filtration and slag discharge, and there is no need to stop the machine regularly to clean the filter residue, thereby improving the recovery efficiency.

[0073] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vanadium redox flow battery recycling and utilization device, comprising a material barrel (1), characterized in that: Also includes: A separation barrel (2) is connected to the material barrel (1) via a connecting pipe (3); A piston assembly is arranged inside the separation barrel (2) and is used to draw the electrolyte in the material barrel (1) into the separation barrel (2) and discharge it after filtering; A slag discharge assembly is provided at one end of the separation barrel (2) and is used for discharging filter residues. The piston assembly can drive the slag discharge assembly to operate; The slag discharge assembly comprises a fixed cylinder (22), a filter residue discharge pipe (4) and a liquid discharge pipe (9) are fixedly provided at the lower portion of the fixed cylinder (22), and a filter plate (229) is fixedly provided at the top end of the liquid discharge pipe (9); The slag discharge assembly further comprises a push cylinder (224) having a discharge port (226) at its bottom. The push cylinder (224) is supported against the inner end of the fixed cylinder (22) via an elastic member (222). A second baffle (227) is fixedly provided at the bottom of one side of the push cylinder (24) away from the separation barrel (2), and a push rod (225) is fixedly provided on the other side. The slag discharge assembly further includes a one-way air valve (221) and a solenoid valve (223); The slag discharge assembly further comprises a switch (2282) for controlling the opening and closing of the solenoid valve (223); the switch (2282) is fixedly mounted on the bottom of the end surface of the fixed cylinder (22) away from the separation barrel (2); and a push rod (2281) is fixedly provided on the end of the second baffle (227) away from the push cylinder (224); A driving assembly (6) for driving the piston assembly to reciprocate inside the separation barrel (2); The piston assembly comprises a piston head (21) and a filter screen (23), wherein the filter screen (23) is fixedly arranged on the piston head (21) at one end close to the slag discharge assembly; The piston head (21) is provided with a flow guide assembly for allowing liquid to pass through the piston head (21) in one direction.

2. The all-vanadium redox flow battery recycling and utilization device according to claim 1, characterized in that: The flow guide assembly comprises a flow guide groove (211), a movable plug (212) and a movable seat (213); the movable seat (213) is fixedly arranged at one end of the movable plug (212); the flow guide groove (211) is provided on the end surface of the piston head (21) away from the filter screen (23) and passes through the piston head (21); a plurality of flow guide grooves (211) are provided; the movable plug (212) is plugged into the flow guide groove (211) under the action of the reset assembly; the number of the movable plugs (212) is the same as the number of the flow guide grooves (211), and they correspond one to one.

3. The all-vanadium redox flow battery recycling and utilization device according to claim 2, characterized in that: The reset assembly includes a sliding sleeve (214) and a sliding rod (215), wherein the sliding sleeve (214) is fixedly mounted on the outer side of the movable seat (213), and the sliding rod (215) is fixedly mounted on an end surface of the piston head (21) away from the filter screen (23). The sliding sleeve (214) is slidably arranged on the sliding rod (215), and a reset spring is mounted around the outer side of the sliding rod (215).

4. The all-vanadium redox flow battery recycling and utilization device according to claim 2, characterized in that: The flow guide assembly further comprises a plurality of flow guide sleeves (216) of annular structure installed in the piston head (21), wherein the plurality of flow guide sleeves (216) and the plurality of flow guide grooves (211) are arranged in a staggered manner, and an inner side wall of the flow guide sleeve (216) is provided with a groove (217) of a spiral structure, and the flow guide sleeve (216) is located between the filter screen (23) and the movable plug (212); The filter screen (23) is provided with a plurality of filter holes, and a filter tip (231) with a conical structure is fixedly provided at one end of each of the plurality of filter holes.

5. The all-vanadium redox flow battery recycling and utilization device according to claim 1, characterized in that: One end of the fixed cylinder (22) is fixedly connected to one end of the separation barrel (2), and the two are communicated with each other. Both are located on the fixed cylinder (22) near the separation barrel (2), and the liquid discharge pipe (9) is closer to the separation barrel (2) than the filter residue discharge pipe (4).

6. The all-vanadium redox flow battery recycling and utilization device according to claim 5, characterized in that: The discharge port (226) is located on the push cylinder (224) near the separation barrel (2). The push cylinder (224) is slidably arranged in the fixed cylinder (22). The inner diameter of the push cylinder (224) is the same as the inner diameter of the separation barrel (2).

7. The all-vanadium redox flow battery recycling and utilization device according to claim 5, characterized in that: The one-way air valve (221) is fixedly arranged on the other end surface of the fixed cylinder (22). The one-way air valve (221) only allows air to enter the fixed cylinder (22). The solenoid valve (223) is fixedly arranged at the center of the push cylinder (224).

8. The all-vanadium redox flow battery recycling and utilization device according to claim 1, characterized in that: The driving assembly (6) includes a piston rod (61), and the piston rod (61) is slidably arranged in the middle of the other end of the separation barrel (2). One end of the piston rod (61) is located inside the separation barrel (2) and is fixedly connected to the piston head (21), and the other end is outside the separation barrel (2). The separation barrel (2), the piston assembly and the slag discharge assembly are all provided in two groups and are symmetrically arranged. The driving assembly (6) further comprises a connecting seat (62), a transmission arm (63) and a transmission block (64); the middle portion of the transmission block (64) is a square slider, both sides of which are fixedly provided with fixed shafts; the connecting seat (62) and the transmission arm (63) are both provided with two, the two connecting seats (62) are respectively fixedly mounted on one end of the two piston rods (61); one end of the two transmission arms (63) are respectively rotatably connected to the two connecting seats (62), and the other end is respectively rotatably connected to the two fixed shafts of the transmission block (64); a guide rail (641) is fixedly provided on the bottom surface of the material barrel (1), and the square slider of the transmission block (64) is slidably provided inside the guide rail (641).

9. The all-vanadium redox flow battery recycling and utilization device according to claim 8, characterized in that: The driving assembly (6) further comprises a slide rail (65) and a driving motor (66), wherein the slide rail (65) is fixedly mounted on the end of one of the fixed shafts on the transmission block (64), a slide groove (651) is provided in the middle of the slide rail (65), and the driving motor (66) is fixedly mounted on the bottom end of the material barrel (1), and a transmission disc (661) is fixedly mounted on the output shaft of the driving motor (66), an extension arm (662) is fixedly mounted on the outer side of the transmission disc (661), a slider (663) is rotatably mounted on the end of the extension arm (662) away from the output shaft, and the slider (663) is slidably arranged in the slide groove (651).

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