All-vanadium redox flow battery recycling device

Abstract

The invention discloses an all-vanadium redox flow battery recycling device, and relates to the technical field of redox flow battery recycling, the all-vanadium redox flow battery recycling device comprises a material barrel, and also comprises a separation barrel communicated with the material barrel through a connecting pipe; the piston assembly is arranged in the separation barrel and used for extracting the electrolyte in the material barrel into the separation barrel, and the electrolyte is discharged after being filtered; the residue discharging assembly is arranged at one end of the separation barrel and used for discharging filter residues, and the piston assembly can drive the residue discharging assembly to operate; and the driving assembly is used for driving the piston assembly to reciprocate in the separation barrel. By arranging the piston assembly and the deslagging assembly, the effect of integrating extraction, filtration and deslagging of the electrolyte can be achieved, the effect of filtering and separating the recycled electrolyte can be achieved, meanwhile, the effect of deslagging without shutdown can also be achieved, and therefore the effect of continuous production is achieved, and the recycling efficiency is improved.

Description

Technical Field

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

[0002] The all-vanadium liquid 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 of vanadium ions of different valence states. The electrolyte is pressed 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, and collects and conducts current through double electrode plates, thereby converting the chemical energy stored in the solution into electrical energy. After the all-vanadium liquid flow battery is abandoned, in order to avoid waste of resources, the electrolyte of the all-vanadium liquid flow battery needs to be recycled. The following reactions occur during the charge and discharge process of the all-vanadium liquid flow battery: Positive electrode: VO 2+ +H 2 O→VO 2 + +2H + +e - , negative electrode: V 3+ +e - →V 2+ Due to the mutual cross-reaction of vanadium ions and the continuous occurrence of side reactions, after long-term operation of the battery, the concentration and valence state 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 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, including 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 frame, 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 simple overall structure and is convenient for multi-directional recovery of the electrolyte in the electrolytic cell. It is easy to operate and has good practicality, thereby effectively solving the problem that manual recovery of the electrolyte in the electrolytic cell consumes manpower time and is prone to waste.

[0004] The above technical solution has some problems in practical application. When recycling the electrolyte of the all-vanadium liquid 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 recovery and recycling device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a vanadium liquid flow battery recovery and recycling 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 liquid flow battery recycling and utilization device, comprising a material barrel, and also comprising:

[0008] A separation barrel, which is 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 arranged 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 comprises a piston head and a filter screen, wherein the filter screen is arranged at one end of the piston head close to the slag discharge assembly;

[0013] The piston head is provided with a flow guide assembly 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 surface of the piston head away from the filter screen, and passes through the piston head, a plurality of guide grooves are arranged, and the movable plug is inserted into the guide groove under the action of the reset assembly, and the number of the movable plugs is the same as the guide grooves, and they correspond 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 installed 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 and the plurality of flow guide grooves are arranged in a staggered manner, the inner side wall of the flow guide sleeve is provided with a groove of spiral structure, 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 plurality of filter holes is fixedly provided with a filter tip of 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, a residue discharge pipe and a liquid discharge pipe are fixedly arranged 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 arranged at the top of the liquid discharge pipe.

[0019] Preferably, the slag discharge assembly also includes a push cylinder having a discharge port at the bottom thereof, and the discharge port is located on the push cylinder near 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, and 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 removal assembly also includes a one-way air valve and a solenoid valve, the one-way air valve is fixedly arranged on the other end surface of the fixed cylinder, the one-way air valve only allows air to enter the fixed cylinder, and the solenoid valve is fixedly arranged at the center of the push cylinder.

[0021] Preferably, the slag discharge assembly also includes a switch for controlling the opening and closing of the solenoid valve, the switch is fixedly installed at the bottom of the end surface away from the separation barrel in the fixed cylinder, and a push rod is 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 in the separation barrel is fixedly connected to the piston head, and the other end is outside the separation barrel, and the separation barrel, the piston assembly and the slag discharge assembly are all 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 fixedly arranged on both sides of the square slider. The connecting seat and the transmission arm are each provided with two, and the two connecting seats are respectively fixedly installed on one end of the two piston rods. One end of the two transmission arms is respectively rotatably connected to the two connecting seats, and the other end is respectively rotatably connected to the two fixed shafts of the transmission block. A guide rail is fixedly arranged 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, a transmission disk is fixedly mounted on the output shaft of the driving motor, 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 arranged in the slide groove.

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

[0026] 1. The piston assembly and the slag discharge assembly provided in the present invention can realize the effect of integrating the extraction, filtration and slag discharge of the electrolyte, 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;

[0027] 2. The present invention arranges a plurality of guide sleeves inside the piston head, and the guide sleeves are provided with grooves of spiral structure inside. The design of the spiral structure of the grooves can guide the electrolyte passing through the guide grooves, so that the electrolyte produces a certain degree of spiral motion. A plurality of filter tips of cone structure are arranged outside the filter screen. The design of the cone structure makes it difficult for vanadium dioxide crystals to block the filter holes during the filtering process. Moreover, the flow rate of the electrolyte is increased after being guided by the grooves. The electrolyte with increased flow rate can pass through the filter holes and the filter tips faster, so that the vanadium dioxide crystals attached near the filter tips can be washed off, so as to facilitate 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, and the compressed gas can be used to clean the discharge port, thereby 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 It is a 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 schematic diagram of the structure of the push cylinder in the present invention.

[0035] Figure 7 It is a schematic diagram of the structure 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 when discharging slag.

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

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

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

[0040] Fig.12 For the present invention Fig.11 Enlarged structural diagram at 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 groove; 66. Drive motor; 661. Transmission disk; 662. Extension arm; 663. Slider. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0043] The present invention provides Figures 1 to 12 The all-vanadium liquid 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 for discharging 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 component 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 driven by 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 working process of continuous extraction, filtering and slag discharge, and then the effect of being able to discharge the filter residue without stopping the machine can be achieved, 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 arranged 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 near the slag discharge component, and the connecting pipe 3 connects the material barrel 1 and the separation barrel 2, and a one-way valve is still arranged 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 arranged at a position of 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 arranged on the filtrate discharge pipe 5, which 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 screen 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, and 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, and then when the piston head 21 moves in the reverse direction, the electrolyte in the separation barrel 2 close to the discharge The space in the slag assembly is filled with electrolyte, so when the piston head 21 moves in the reverse 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 close to the filtrate discharge pipe 5, and then the piston head 21 moves in the reverse direction again to draw the electrolyte into the separation barrel 2 again, and at the same time pushes the filtrate into the filtrate discharge pipe 5 for discharge, so that through the reciprocating motion of the piston assembly, it is possible to not only draw 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, so as to prevent 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 an 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 plurality of filter holes is fixedly provided with a filter tip 231 of a conical structure. The design of the conical structure can reduce the probability of vanadium dioxide crystals blocking 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 connected. A filter residue discharge pipe 4 and a liquid discharge pipe 9 are fixedly arranged at the lower part of the fixed cylinder 22, and 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. A filter plate 229 is fixedly arranged at the top of the liquid discharge pipe 9. A conduit 7 is fixedly arranged 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 position of the filtrate discharge pipe 5, and 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, a discharge port 226 is provided at the bottom of the push tube 224, and the discharge port 226 is located at a position on the push tube 224 close to the separation barrel 2. The push tube 224 is slidably arranged in the fixed tube 22, and the push tube 224 leans against the inner end of the fixed tube 22 through the 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 arranged at the bottom of one side of the push tube 224 away from the separation barrel 2, and a push rod 225 is fixedly arranged on the other side. The elastic member 222 and the second baffle 227 are located in the same space, and the space 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, and at this time, the middle position of the bottom of the push tube 224 is located at the filter plate 229, closing the filter plate 229; the elastic member 222 can be a spring.

[0062] Under normal conditions, the push cylinder 224 is 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 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. The liquid storage space can store a part of the residual liquid. The liquid can make the solid filtered by the filter screen 23 soak in it, and will not directly stick to the filter screen 23, which can effectively prevent the filtered solid from blocking the filter screen 23. The solid-liquid mixture in the 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, and when the discharge port 226 passes through the filter plate 229, the residual liquid will flow downward through the filter plate 229 to 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 forward, and the vanadium dioxide crystals will be taken away with the movement of the push cylinder 224, and 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 removal 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 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.

[0065] Through the one-way air valve 221, gas can enter when the push cylinder 224 is reset, so as to facilitate the reset of the push cylinder 224; under normal conditions, the solenoid 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 through 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, so that the solenoid valve 223 opens, 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 outward 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 located in the separation barrel 2 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 fixedly arranged on both sides of the square slider. 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 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 arranged on the bottom surface of the material barrel 1, and the square slider of the transmission block 64 is slidably arranged 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 driving assembly 6 is in use, the driving motor 66 is started, and the output shaft of the driving 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 slide 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 driving 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 drawn 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 this process, 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 to push 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, through the selection of 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 forward, 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 discharge pipe 9, and then be discharged into the filtrate discharge pipe 5 through the conduit 7, 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 forward, 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 When the filter residue passes 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 moves in the reverse 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 reverse direction, the filtrate in the separation barrel 2 can be pushed into the filtrate discharge pipe 5 for discharge, and new electrolyte can be extracted into the separation barrel 2 at the same time. 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, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to 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 protection scope 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) 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 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; 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 arranged on one end of the piston head (21) close to the slag discharge assembly; The piston head (21) is provided with a flow guide component 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 is 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 arranged on an 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 arranged; 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 that 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 is characterized in that: The reset assembly comprises a sliding sleeve (214) and a sliding rod (215); the sliding sleeve (214) is fixedly mounted on the outer side of the movable seat (213); 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 is 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), and the plurality of flow guide sleeves (216) are arranged in a staggered manner with the plurality of flow guide grooves (211), and the 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 is characterized in that: The slag discharge assembly comprises a fixed cylinder (22), 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; a filter residue discharge pipe (4) and a liquid discharge pipe (9) are fixedly arranged at the lower part of the fixed cylinder (22), and both are located at a position on the fixed cylinder (22) close to the separation barrel (2), and the liquid discharge pipe (9) is closer to the separation barrel (2) than the filter residue discharge pipe (4); and a filter plate (229) is fixedly arranged at the top end of the liquid discharge pipe (9).

6. The all-vanadium redox flow battery recycling and utilization device according to claim 5 is characterized in that: The slag discharge assembly also includes a push cylinder (224), a bottom of which is provided with a discharge port (226), and 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 push cylinder (224) leans against the inner end of the fixed cylinder (22) through an elastic member (222), the inner diameter of the push cylinder (224) is the same as the inner diameter of the separation barrel (2), a second baffle (227) is fixedly arranged at the bottom of a side surface of the push cylinder (24) away from the separation barrel (2), and a push rod (225) is fixedly arranged on the other side surface.

7. The all-vanadium redox flow battery recycling and utilization device according to claim 5 is characterized in that: The slag removal 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 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 6 is characterized in that: 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); and a push rod (2281) is fixedly provided on the end of the second baffle (227) away from the push cylinder (224).

9. The all-vanadium redox flow battery recycling and utilization device according to claim 1, characterized in that: The driving assembly (6) comprises a piston rod (61), the piston rod (61) being slidably arranged in the middle of the other end of the separation barrel (2), one end of the piston rod (61) being located inside the separation barrel (2) being fixedly connected to the piston head (21), and the other end being 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) 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 fixedly arranged on both sides of the square slider. The connecting seat (62) and the transmission arm (63) are each provided with two connecting seats (62), and 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 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). The bottom surface of the material barrel (1) is fixedly provided with a guide rail (641), and the square slider of the transmission block (64) is slidably arranged inside the guide rail (641).

10. The all-vanadium redox flow battery recycling and utilization device according to claim 9, characterized in that: The driving assembly (6) further comprises a slide rail (65) and a driving motor (66); 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); the driving motor (66) is fixedly mounted on the bottom end of the material barrel (1); a transmission disk (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 disk (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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