Waste power battery electrolyte heating condensation recovery system

Abstract

The present invention relates to the technical field of waste liquid cleaning, and discloses a waste power battery electrolyte heating condensation recovery system, including a first heat exchanger and a second heat exchanger, and the first heat exchanger and the second heat exchanger are connected through a water pipe, the bottoms of the first heat exchanger and the second heat exchanger are both installed with a cold source, the side wall of the first heat exchanger away from the second heat exchanger is connected with an exhaust fan, the side wall of the second heat exchanger away from the first heat exchanger is connected with an exhaust gas treatment device, the first heat exchanger and the second heat exchanger are commonly connected with a separation barrel, the other side of the separation barrel is installed with a product temporary storage barrel and a waste liquid temporary storage barrel; the top of the separation barrel and the outer barrel wall on one side close to the top are fixedly connected with a liquid inlet pipe. The waste power battery electrolyte heating condensation recovery system has automatic filter cleaning, thereby improving the effect of the device.

Description

Technical Field

[0001] The invention relates to the technical field of waste liquid cleaning, and in particular to a system for heating and condensing electrolyte of waste power batteries for recovery. Background Art

[0002] The "Industry Standard Conditions for Comprehensive Utilization of Waste Power Batteries of New Energy Vehicles" issued by the Ministry of Industry and Information Technology clearly states that in the process of recycling waste power batteries, electronic components, metals, graphite, plastics, rubber, diaphragms, electrolytes and other parts and materials can be reasonably recycled and processed, with corresponding pollution control measures and standardized disposal plans for unusable residues. The use of recycling technologies, equipment and processes with good environmental benefits and high recycling efficiency is encouraged.

[0003] The electrolyte material composition is prepared by dissolving high-purity lithium hexafluorophosphate salt in organic solvents such as dimethyl carbonate; the content of high-purity lithium hexafluorophosphate is about 5%, and the organic solvent is 95%. The organic solvents mainly include DMC (dimethyl carbonate), PC (propylene carbonate), EC (ethylene carbonate), DEC (diethyl carbonate), EMC (ethyl methyl carbonate), etc.

[0004] There are three current situations for the recycling of electrolytes in the treatment process by existing processing companies: 1. Directly subjecting the battery to pyrometallurgical and hydrometallurgical smelting treatment without any treatment of the waste electrolyte; 2. Subjecting the waste electrolyte to vacuum pyrolysis treatment, but this will form fluoride emissions that pollute the environment, with high energy consumption, and the pyrolysis products need to be further harmlessly treated; 3. Recycling the waste electrolyte using organic solvent extraction methods, but this has the disadvantages of high solvent cost, high energy consumption, complex process and solvent pollution.

[0005] Gas liquefaction can only be achieved under the combined action of basic conditions such as a certain concentration, a certain temperature and external forces (pressure changes or other media). According to this basic principle, the electrolyte is heated by a multi-layer heating system, and the heating temperature is set at 150-180°C, so that the electrolyte is continuously heated and fully vaporized, and the volatile gas enters the first-order condensation (condensation heat exchanger). This stage is a water cooling technology, and then the low-concentration electrolyte is enriched through internal gas circulation to increase the concentration of the volatile gas electrolyte. Finally, it enters the second-order condensation (condensation exchanger) for condensation and liquefaction, forming a liquid that enters the storage tank for collection. The gas with a qualified electrolyte concentration after the first-order condensation directly enters the second-order condensation for liquefaction and collection without the need for enrichment.

[0006] The condensation process conditions are as follows: 1. The inlet air temperature range is: 90-150°C; 2. The inlet air concentration range is 10-40%; 3. The external force factors are the application of pressure and inducement to achieve the liquefaction of organic gas.

[0007] The cells that cannot be reused in the process of dismantling the waste power batteries are put into the crushing system, and are shredded by a slow special crusher to fully crush the scrapped batteries and release the electrolyte. The crushed materials enter the heating system to heat the materials, and the electrolyte is fully volatilized by multi-layer heating. The volatile gas enters the two-stage condensation system for condensation, enrichment, and liquefaction collection. The heating system is equipped with an exhaust gas collection hood, and the collection air duct adopts a tapered design, and then the air intake fan wind speed and exhaust are set to control the intake concentration between 10-40%.

[0008] During liquid treatment, the waste liquid is first gasified by the above treatment method, passed into the first heat exchanger and the second heat exchanger through the exhaust fan, and then passed into the separation barrel, and separated by the filter in the separation barrel. However, the existing liquid separation often causes the filter to be blocked, thereby reducing the separation effect of the device. Summary of the invention

[0009] 1. Technical issues to be resolved

[0010] In view of the deficiencies in the prior art, the present invention provides a waste power battery electrolyte heating condensation recovery system, which has the advantages of automatic filter cleaning, thereby improving the effect of the device, and solves the problem of poor separation effect of existing cleaning devices.

[0011] (II) Technical solution

[0012] In order to achieve the purpose of automatic cleaning of the above-mentioned filter screen and thus improve the effect of the use of the device, the present invention provides the following technical solutions: a waste power battery electrolyte heating condensation recovery system, comprising a first heat exchanger and a second heat exchanger, and the first heat exchanger and the second heat exchanger are connected through a water pipe, the first heat exchanger and the second heat exchanger are both installed with a cold source at the bottom, the side wall of the first heat exchanger away from the second heat exchanger is connected to an exhaust fan, the side wall of the second heat exchanger away from the first heat exchanger is connected to an exhaust gas treatment device, the first heat exchanger and the second heat exchanger are commonly connected to a separation barrel, and the other side of the separation barrel is installed with a product temporary storage barrel and a waste liquid temporary storage barrel;

[0013] The top of the separation barrel and the outer barrel wall on one side close to the top are both fixedly connected with a liquid inlet pipe, and the vertical outer barrel wall on the other side of the separation barrel is fixedly connected with two liquid outlet pipes in the vertical direction, and valves are installed on the liquid outlet pipes, the liquid outlet pipe located at the top is connected with the product temporary storage barrel, and the liquid outlet pipe located at the bottom is connected with the waste liquid temporary storage barrel, and a valve plate is installed at the bottom of the separation barrel through a connecting mechanism, and an inner cavity is opened on the barrel wall of the separation barrel away from the liquid outlet pipe, and a motor is installed on the top cavity wall of the inner cavity, and the output end of the motor is connected to a rotating rod through a coupling, and the lower end of the rotating rod is toward the cavity The filter screen is symmetrically provided with screw holes, and a reciprocating screw rod is threadedly connected to the filter screen. An end of the reciprocating screw rod close to the inner cavity is fixedly connected to a connecting rod, and an end of the connecting rod away from the reciprocating screw rod extends into the inner cavity and is fixedly connected to a first bevel gear. The connecting rod is rotatably connected to the inner cavity, and two second bevel gears meshing with the first bevel gear are fixedly sleeved on the rotating rod.

[0014] Preferably, the connecting mechanism includes a card hole, a card slot, a spring and a card block, the valve plate is hinged to the separation barrel, the card hole is opened on the separation barrel, the card slot is opened on the side wall of the valve plate and the card hole matching, the spring is fixedly connected to the bottom of the card slot, the other end of the spring is fixedly connected to the card block, and the end of the card block away from the spring passes through the card slot and extends into the card hole.

[0015] Preferably, one end of the reciprocating screw rod away from the connecting rod is fixedly connected to a limiting block.

[0016] Preferably, slide grooves are symmetrically provided on the opposite groove walls of the card slot, and sliders are slidably connected in the slide grooves. The facing ends of the two sliders pass through the notches of the corresponding slide grooves and extend outwards, and are fixedly connected to the card block.

[0017] Preferably, the cross-section of the block is trapezoidal.

[0018] Preferably, a protective cover is hingedly connected to the hole wall of the card hole away from the card slot.

[0019] Preferably, the first heat exchanger, the second heat exchanger, the separation barrel, the product temporary storage barrel and the waste liquid temporary storage barrel are all coated with anti-rust paint.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the present invention provides a system for heating and condensing electrolyte of waste power batteries, which has the following beneficial effects:

[0022] 1. The waste power battery electrolyte heating condensation recovery system is provided with a first heat exchanger, a second heat exchanger, a cold source, an exhaust fan, a processing device, a separation barrel, an inner cavity, a motor, a rotating rod, a filter cartridge, a filter screen, a screw hole, a reciprocating screw rod, a connecting rod, a first bevel gear and a second bevel gear. When operating, the exhaust fan is started to draw the external gas into the first heat exchanger, then into the cold source, and then into the second heat exchanger, and the corresponding cold source is used to process the gas. The first heat exchanger and the second heat exchanger then send the liquid into the separation barrel. The first heat exchanger and the second heat exchanger are connected to the first heat exchanger. The liquid in the converter enters the separation barrel through the liquid inlet pipe, and the motor is started. The motor drives the rotating rod to rotate, which in turn rotates the second bevel gear, and then the first bevel gear rotates, which in turn rotates the reciprocating screw rod, which in turn causes the filter to reciprocate. When the filter moves forward, the impurities remaining on the filter fall with the water flow, which makes it easier to clean the impurities on the filter. When the product is needed, the valve on the liquid outlet pipe leading to the waste liquid temporary storage barrel is closed, and the valve on the liquid outlet pipe leading to the product waste liquid temporary storage barrel is opened. The liquid flows into the product temporary storage barrel along the liquid outlet pipe. When the waste liquid needs to be collected, the reverse operation can be performed.

[0023] 2. The waste power battery electrolyte heating and condensation recovery system is provided with a card hole, a card slot, a spring and a card block. When the residue needs to be cleaned, the pressure of a compression spring is applied to the card block, and then the valve plate is separated from the separation barrel, and the residual value can be cleaned. After cleaning, the valve plate can be closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a flow chart of the waste power battery electrolyte heating condensation recovery system proposed by the present invention;

[0025] Figure 2 This is a schematic diagram of the specific structure of the separation barrel of the waste power battery electrolyte heating and condensation recovery system proposed by the present invention;

[0026] Figure 3 for Figure 2 A magnified view of part A;

[0027] Figure 4 for Figure 2 Enlarged view of part B.

[0028] In the figure: 1 a first heat exchanger, 2 a second heat exchanger, 3 a cold source, 4 an exhaust fan, 5 a processing device, 6 a separation barrel, 7 a connecting mechanism, 71 a clamping hole, 72 a clamping groove, 73 a spring, 74 a clamping block, 8 a slider, 9 a valve plate, 10 an inner cavity, 11 a motor, 12 a rotating rod, 13 a filter cartridge, 14 a filter screen, 15 a screw hole, 16 a reciprocating screw rod, 17 a connecting rod, 18 a first bevel gear, 19 a second bevel gear, and 20 a slide groove. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figure 1-4 , a waste power battery electrolyte heating condensation recovery system, comprising a first heat exchanger 1 and a second heat exchanger 2, wherein the first heat exchanger 1 and the second heat exchanger 2 are connected via a water pipe, a cold source 3 is installed at the bottom of each of the first heat exchanger 1 and the second heat exchanger 2, an exhaust fan 4 is connected to the side wall of the first heat exchanger 1 away from the second heat exchanger 2, an exhaust gas treatment device 5 is connected to the side wall of the second heat exchanger 2 away from the first heat exchanger 1, a separation barrel 6 is commonly connected between the first heat exchanger 1 and the second heat exchanger 2, and a product temporary storage barrel and a waste liquid temporary storage barrel are installed on the other side of the separation barrel 6;

[0031] The top of the separation barrel 6 and the outer barrel wall on one side near the top are fixedly connected with a liquid inlet pipe, and the vertical outer barrel wall on the other side of the separation barrel 6 is fixedly connected with two liquid outlet pipes in the vertical direction, and valves are installed on the liquid outlet pipes. The liquid outlet pipe at the top is connected to the product temporary storage barrel, and the liquid outlet pipe at the bottom is connected to the waste liquid temporary storage barrel. A valve plate 9 is installed at the bottom of the separation barrel 6 through a connecting mechanism 7. An inner cavity 10 is opened on the barrel wall of the separation barrel 6 away from the liquid outlet pipe, and a motor 11 is installed on the top cavity wall of the inner cavity 10. The output end of the motor 11 is connected through a coupling There is a rotating rod 12, the lower end of the rotating rod 12 extends into the cavity wall, and the rotating rod 12 is rotatably connected to the bottom cavity wall of the inner cavity 10, a filter cartridge 13 is fixedly connected to the inner barrel wall of the separation barrel 6 away from the inner cavity 10, the liquid outlet pipe at the top is located in the filter cartridge 13, a filter screen 14 is sealed and slidably connected in the filter cartridge 13, a screw hole 15 is symmetrically opened on the filter screen 14, a reciprocating screw rod 16 is threadedly connected in the screw hole 15, one end of the reciprocating screw rod 16 close to the inner cavity 10 is fixedly connected to a connecting rod 17, and one end of the connecting rod 17 away from the reciprocating screw rod 16 extends into the inner cavity 10, and is fixedly connected to the inner wall of the inner cavity 10. The first bevel gear 18 is fixedly connected, the connecting rod 17 is rotatably connected to the inner cavity 10, and two second bevel gears 19 meshing with the first bevel gear 18 are fixedly sleeved on the rotating rod 12. When operating, the exhaust fan is started to draw the external gas into the first heat exchanger 1, and then sent to the cold source, and then sent to the second heat exchanger 2, and the gas is processed in conjunction with the corresponding cold source. The first heat exchanger 1 and the second heat exchanger then send the liquid into the separation barrel 6. The liquid of the first heat exchanger 1 and the second heat exchanger 2 enters the separation barrel 6 through the liquid inlet pipe, and the motor 11 is started. The motor 11 drives the rotating rod 12 to rotate, thereby rotating the second bevel gear 19, and then rotating the first bevel gear 12, thereby rotating the reciprocating screw rod 16, and then reciprocating the filter screen 14. When the filter screen 14 moves forward, the impurities remaining on the filter screen 14 fall with the water flow, thereby facilitating the cleaning of the impurities on the filter screen 14. When the product is needed, the valve on the liquid outlet pipe leading to the waste liquid temporary storage barrel is closed, and the valve on the liquid outlet pipe leading to the product waste liquid temporary storage barrel is opened, and the liquid flows into the product temporary storage barrel along the liquid outlet pipe. When the waste liquid needs to be collected, the reverse operation can be performed.

[0032] The connecting mechanism 7 includes a card hole 71, a card slot 72, a spring 73 and a card block 74. The valve plate 9 is hinged to the separation barrel 6. The card hole 71 is opened on the separation barrel 6, and the card slot 72 is opened on the side wall of the valve plate 9 that matches the card hole 71. The spring 73 is fixedly connected to the bottom of the card slot 72, and the other end of the spring 73 is fixedly connected to the card block 74. The end of the card block 74 away from the spring 73 passes through the card slot 72 and extends into the card hole 71. When it is necessary to clean the residue, a pressure of the compression spring 73 is applied to the card block 74, so that the valve plate 9 is separated from the separation barrel 6, and the residue can be cleaned. After cleaning, the valve plate 9 can be closed.

[0033] One end of the reciprocating screw 16 away from the connecting rod 17 is fixedly connected to a limiting block to prevent the filter screen 14 from being separated from the reciprocating screw 16 .

[0034] The relative groove walls of the card slot 72 are symmetrically provided with sliding grooves 20, and the sliders 8 are slidably connected in the sliding grooves 20. The facing ends of the two sliders 8 pass through the corresponding notches of the sliding grooves 20 and extend outward, and are fixedly connected to the card block 74 to prevent the card block 74 from escaping from the card slot 72.

[0035] The cross section of the clamping block 74 is trapezoidal, so that the clamping block 74 can be easily inserted into the clamping hole 71 .

[0036] A protective cover is hingedly connected to the hole wall of the card hole 71 away from the card slot 72 to prevent unrelated personnel from touching the card block 74.

[0037] The first heat exchanger 1, the second heat exchanger 2, the separation barrel 6, the product temporary storage barrel and the waste liquid temporary storage barrel are all coated with anti-rust paint to prevent the first heat exchanger 1, the second heat exchanger 2, the separation barrel 6, the product temporary storage barrel and the waste liquid temporary storage barrel from rusting.

[0038] In summary, the waste power battery electrolyte heating condensation recovery system starts the exhaust fan during operation to draw the outside gas into the first heat exchanger 1, then sends it to the cold source, and then sends it to the second heat exchanger 2, and cooperates with the corresponding cold source to process the gas. The first heat exchanger 1 and the second heat exchanger then send the liquid into the separation barrel 6. The liquids of the first heat exchanger 1 and the second heat exchanger 2 enter the separation barrel 6 through the liquid inlet pipe, and the motor 11 is started. The motor 11 drives the rotating rod 12 to rotate, thereby rotating the second bevel gear 19, and then rotating the first bevel gear 12, thereby rotating the reciprocating screw rod. 16 rotates, thereby causing the filter screen 14 to reciprocate, and when the filter screen 14 moves forward, the impurities remaining on the filter screen 14 fall with the water flow, so that it is convenient to clean the impurities on the filter screen 14. When the product is needed, the valve on the liquid outlet pipe leading to the waste liquid temporary storage barrel is closed, and the valve leading to the liquid outlet pipe of the product waste liquid temporary storage barrel is opened, and the liquid flows into the product temporary storage barrel along the liquid outlet pipe. When the waste liquid needs to be collected, the reverse operation can be performed; when the residue needs to be cleaned, the pressure of a compression spring 73 is applied to the block 74, and the valve plate 9 is separated from the separation barrel 6, so that the residual value can be cleaned, and the valve plate 9 can be closed after cleaning.

[0039] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste power battery electrolyte heating and condensation recovery system, comprising a first heat exchanger (1) and a second heat exchanger (2), wherein the first heat exchanger (1) and the second heat exchanger (2) are connected via a water pipe, and characterized in that: A cold source (3) is installed at the bottom of each of the first heat exchanger (1) and the second heat exchanger (2); an exhaust fan (4) is connected to the side wall of the first heat exchanger (1) away from the second heat exchanger (2); an exhaust gas treatment device (5) is connected to the side wall of the second heat exchanger (2) away from the first heat exchanger (1); a separation barrel (6) is connected between the first heat exchanger (1) and the second heat exchanger (2); a product temporary storage barrel and a waste liquid temporary storage barrel are installed on the other side of the separation barrel (6); The top of the separation barrel (6) and the outer barrel wall on one side close to the top are both fixedly connected with a liquid inlet pipe. The other side of the vertical outer barrel wall of the separation barrel (6) is fixedly connected with two liquid outlet pipes in the vertical direction, and valves are installed on the liquid outlet pipes. The liquid outlet pipe located at the top is connected to the product temporary storage barrel, and the liquid outlet pipe located at the bottom is connected to the waste liquid temporary storage barrel. The bottom of the separation barrel (6) is installed with a valve plate (9) through a connecting mechanism (7). The barrel wall of the separation barrel (6) away from the liquid outlet pipe is provided with an inner cavity (10). A motor (11) is installed on the top cavity wall of the inner cavity (10). The output end of the motor (11) is connected to a rotating rod (12) through a coupling. The lower end of the rotating rod (12) extends into the cavity wall, and the rotating rod (12) is rotatably connected to the bottom cavity wall of the inner cavity (10). The separation barrel (6) is fixedly connected to a filter cartridge (13) on the inner barrel wall away from the inner cavity (10), the liquid outlet pipe located at the top is located in the filter cartridge (13), a filter screen (14) is sealingly and slidably connected to the inner wall of the filter cartridge (13), the filter screen (14) is symmetrically provided with screw holes (15), a reciprocating screw rod (16) is threadedly connected to the inner wall of the screw hole (15), an end of the reciprocating screw rod (16) close to the inner cavity (10) is fixedly connected to a connecting rod (17), an end of the connecting rod (17) away from the reciprocating screw rod (16) extends into the inner cavity (10) and is fixedly connected to a first bevel gear (18), the connecting rod (17) is rotatably connected to the inner cavity (10), and two second bevel gears (19) meshing with the first bevel gear (18) are fixedly sleeved on the rotating rod (12); The connecting mechanism (7) comprises a clamping hole (71), a clamping groove (72), a spring (73) and a clamping block (74); the valve plate (9) is hinged to the separation barrel (6); the clamping hole (71) is provided on the separation barrel (6); the clamping groove (72) is provided on a side wall of the valve plate (9) that matches the clamping hole (71); the spring (73) is fixedly connected to the bottom of the clamping groove (72); the other end of the spring (73) is fixedly connected to the clamping block (74); and an end of the clamping block (74) away from the spring (73) passes through the clamping groove (72) and extends into the clamping hole (71); One end of the reciprocating screw rod (16) away from the connecting rod (17) is fixedly connected to a limiting block.

2. The waste power battery electrolyte heating condensation recovery system according to claim 1 is characterized by: Slide grooves (20) are symmetrically provided on the opposite groove walls of the clamping groove (72), and sliders (8) are slidably connected in the slide grooves (20). The facing ends of the two sliders (8) pass through the notches of the corresponding slide grooves (20) and extend outwards, and are fixedly connected to the clamping block (74).

3. The waste power battery electrolyte heating condensation recovery system according to claim 1 is characterized by: The cross section of the clamping block (74) is arranged in a trapezoidal shape.

4. The waste power battery electrolyte heating condensation recovery system according to claim 1 is characterized by: A protective cover is hingedly connected to the hole wall of the clamping hole (71) away from the clamping slot (72).

5. The waste power battery electrolyte heating condensation recovery system according to claim 1 is characterized by: The first heat exchanger (1), the second heat exchanger (2), the separation barrel (6), the product temporary storage barrel and the waste liquid temporary storage barrel are all coated with anti-rust paint.

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