Multi-stage battery crushing device

Abstract

The invention discloses a multistage battery crushing device which comprises a climbing conveying belt, a battery crushing structure, a tail gas treatment device and an inlet and outlet sealing structure. The battery crushing structure comprises a high-speed shredding machine, an upper connecting cylinder, a lower connecting cylinder, a feeding mechanism, a circulating sealing structure and a nitrogen circulating structure arranged between the upper connecting cylinder and the lower connecting cylinder, a mechanical sealing seat is arranged on an embedding opening, and a pressurizing guide piece is arranged at the upper end and the lower end in the high-speed shredding machine; the tail gas treatment device comprises an upper tail gas guide pipe and a processor; the precipitation separation structure comprises an extension pipeline connected with the treater, the tail end of the extension pipeline is connected with a rotary precipitator, the outlet end of the rotary precipitator is connected with a tail gas speed increasing structure, and the tail gas speed increasing structure is output to a lower precipitator. And even if explosion occurs, more buffer space can be provided.

Description

Technical Field

[0001] This invention relates to the field of battery recycling, and in particular to a multi-stage battery crushing device. Background Technology

[0002] As the popularity of new energy vehicles increases, some power batteries are being phased out of the automotive sector. The harmful substances contained in waste batteries pose a serious threat to the environment and human health. However, the content of valuable metals such as lithium, cobalt, nickel, and manganese in waste lithium batteries is obviously higher than that in natural ores. Efficient recycling can help alleviate my country's dependence on imports of strategic metal resources. Therefore, developing green and efficient waste lithium battery recycling technology has become an urgent need. Most existing battery crushing methods still use the whole-cell crushing method, directly feeding the entire battery into the crushing equipment for crushing.

[0003] Mechanical friction or short circuits during the crushing process may generate high temperatures. If the battery has defects (such as internal short circuits), it may cause thermal runaway. Therefore, nitrogen needs to be injected during the crushing process for protection, to suppress the chemical reaction rate, and to prevent heat accumulation from causing a chain reaction. However, the following problems are likely to occur during the battery crushing process: 1. The injected nitrogen can easily move to the next station with the battery debris, resulting in nitrogen loss; 2. Nitrogen will still leak from the feeding position and the power output position, making it difficult to reduce the cost of nitrogen use; 3. When the battery is being fed, the exhaust gas generated during battery crushing can easily evaporate directly into the air, resulting in pollution.

[0004] Therefore, this case aims to provide a multi-stage battery crushing device that not only allows nitrogen to circulate at high speed within the crushing device, but also prevents nitrogen from leaking out of the circulation equipment and the inlet and outlet positions, thereby greatly improving the nitrogen retention rate and providing more buffer space even in the event of an explosion. Summary of the Invention

[0005] This invention provides a multi-stage battery crushing device that can effectively solve the above-mentioned problems.

[0006] This invention is implemented as follows: A multi-stage battery crushing device, comprising: A climbing conveyor belt, the discharge end of which is connected to a battery crushing structure, a tail gas treatment device is provided on the top of the battery crushing structure, and inlet and outlet closed structures are provided at the upper and lower ends of the battery crushing structure. The battery crushing structure includes a high-speed shredder mounted on a crusher unit mounting frame. An upper connecting cylinder is installed at the upper end of the high-speed shredder, and a lower connecting cylinder is installed at the lower end of the high-speed shredder. The upper end of the upper connecting cylinder is connected to the feeding mechanism. The circulating sealing structure includes a nitrogen circulation structure disposed between the upper and lower connecting cylinders. A mechanical seal seat is provided on the insertion port. A pressurizing guide is provided at the upper and lower ends inside the high-speed shredder. The pressurized nitrogen is guided by the pressurizing guide and then circulates rapidly in the nitrogen circulation structure. The exhaust gas treatment device includes an upper exhaust gas duct disposed at the upper end of the upper connecting cylinder, the upper exhaust gas duct being connected to a processor; a sedimentation separation structure includes an extension pipe connected to the processor, the end of the extension pipe being connected to a rotary sedimentator, the outlet end of the rotary sedimentator being connected to an exhaust gas acceleration structure, the exhaust gas acceleration structure outputting to a lower sedimentator, and the exhaust gas being precipitated by the lower sedimentator and then connected to a burner through a combustion pipe.

[0007] As a further improvement, the inlet and outlet sealing structure includes a double-slide valve disposed at the top of the upper connecting cylinder, and a flap valve disposed at the lower end of the lower connecting cylinder.

[0008] As a further improvement, the pressurizing guide includes an annular separation cover disposed on the upper connecting cylinder and the lower connecting cylinder. The annular separation cover is connected to the external air passage. A sealing plate is connected to the inner side of the annular separation cover. A connecting plate is disposed between the sealing plates. When the battery is fed, the sealing plate hangs down naturally. When the high-speed shredder crushes the battery, the sealing plate is inflated and connected by the connecting plate to form a sealing guide.

[0009] As a further improvement, the rotary settler includes a first deflection section connected to an extension pipeline, the lower end of the first deflection section being connected to a settling section, the outlet of the settling section being connected to a second deflection section, the second deflection section being connected to the exhaust gas acceleration structure, and the lower end of the settling section being connected to a settling discharge pipe, the settling discharge pipe being controlled by a discharge valve.

[0010] As a further improvement, the exhaust gas speed-up structure includes a fan mounting bracket, a fan mounting seat is provided on the fan mounting bracket, an exhaust gas speed-up fan is provided on the fan mounting seat, the outlet end of the rotary sedimentator is inserted into the inlet end of the exhaust gas speed-up fan, and the outlet end of the exhaust gas speed-up fan is inserted into the lower sedimentator.

[0011] As a further improvement, the lower sedimentation tank includes a lower sedimentation cylinder mounted on a fan mounting bracket. The lower half of the outer circumference of the lower sedimentation cylinder is connected to a sedimentation tank output pipe. An inclined guide plate is provided inside the lower sedimentation cylinder. The inclined guide plate has several holes. The bottom of the inclined guide plate is flush with the air inlet end of the sedimentation tank output pipe.

[0012] As a further improvement, the nitrogen circulation structure includes a first circulation pipe disposed on the side of the upper connecting cylinder, and a second circulation pipe is laterally connected to the lower connecting cylinder. The first circulation pipe and the second circulation pipe are connected by a circulation connecting pipe, and the angle between the first circulation pipe, the second circulation pipe and the horizontal plane is 120° to 150°.

[0013] As a further improvement, the crushing drive includes a reducer mounted on the crusher unit mounting frame, the reducer being connected to an output wheel via a belt, the output wheel being connected to a high-speed rotating shaft that runs through the high-speed shredder.

[0014] As a further improvement, the mechanical seal seat includes an inner inlay seat embedded in the inlay ports on both sides of the high-speed shredder, and an outer inlay seat is locked and fixed on the side of the inner inlay seat away from the high-speed shredder.

[0015] As a further improvement, the interior of the inlay is provided with a mechanical labyrinth.

[0016] The beneficial effects of this invention are: Existing exhaust gases actually contain some flammable oily substances. If these gases are drawn into the combustion equipment, they may cause the equipment to explode. If the explosion is too violent, it can easily cause an accident. Therefore, this invention uses a sedimentation separation structure. First, the processor intercepts the solid particles in the exhaust gas. Then, the exhaust gas speed-up structure draws the remaining exhaust gas to a rotary settler, where the oily substances settle in the bend area of ​​the rotary settler. After secondary sedimentation in the lower settler, most of the oily substances in the gas are removed, thus reducing the amount of oily substances in the gas entering the burner and making it safer.

[0017] Some existing equipment circulates nitrogen to reduce nitrogen input costs. However, nitrogen still leaks from the feed and power output points, making it difficult to reduce nitrogen usage costs. Therefore, this invention addresses this issue with a circulating sealing structure. First, a pressurized nitrogen circulation structure is installed at the upper and lower connecting cylinders, allowing nitrogen to circulate under pressure within the high-speed shredder. Since the nitrogen is pressurized, it is prone to leaking from the power installation port of the high-speed shredder. Therefore, this invention also includes a mechanical seal at the insertion port of the high-speed shredder to seal this location. Even if pressurized nitrogen leaks when flowing through this location, the leakage is extremely small and negligible relative to the total amount.

[0018] The present invention has an inlet and outlet closed structure at the feeding and discharging positions. The double slide valve and the flap valve can seal the isolation chambers at the feeding and discharging positions respectively, thereby preventing gas from leaking into the outside area during feeding and discharging, thus ensuring the internal sealing effect.

[0019] During the nitrogen pressurization process, if nitrogen is directly introduced to the upper and lower connecting cylinders, although the inlet and outlet sealed structure will prevent leakage, once the inlet and outlet sealed structure is opened for feeding or discharging, this gas will still rush into the partition of the inlet and outlet sealed structure. Therefore, the present invention, through the setting of the pressurization guide, can form a sealed guide surface during the crushing stage, and can be pushed open by the gravity of the battery during feeding. This allows nitrogen to avoid a portion of the gas entering the upper and lower connecting cylinders during the high-pressure self-circulation process, forming a better gas isolation environment, improving the nitrogen retention rate, and not hindering the normal feeding of the battery. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a top view of the structure of the present invention.

[0023] Figure 3 This is the present invention. Figure 2 Cross-sectional view at point CC.

[0024] Figure 4 This is the present invention. Figure 3A magnified view of region A in the middle.

[0025] Figure 5 This is a three-dimensional structural schematic diagram of the exhaust gas treatment device of the present invention.

[0026] Figure 6 This is a rear view schematic diagram of the exhaust gas treatment device of the present invention.

[0027] Figure 7 This is a three-dimensional structural diagram of the rotary sedimentation tank of the present invention.

[0028] Figure 8 This is a top view of the rotary sedimentation tank of the present invention.

[0029] Figure 9 This is the present invention. Figure 8 Cross-sectional view at point AA.

[0030] Figure 10 This is a three-dimensional structural diagram of the battery breakage structure of the present invention.

[0031] Figure 11 This is a front view schematic diagram of the battery breakage structure of the present invention.

[0032] Figure 12 This is a top view schematic diagram of the battery breakage structure of the present invention.

[0033] Figure 13 This is the present invention. Figure 12 Cross-sectional view at point BB.

[0034] In the picture: Upper exhaust gas duct 10, upper guide pipe 101, backflush pipe 102, processor 11, sedimentation separation structure 12, extension pipeline 121, rotary settler 122, first turning section 1221, sedimentation section 1222, second turning section 1223, sedimentation discharge pipe 1224, discharge valve 1225, exhaust gas speed-up structure 123, fan mounting bracket 1231, fan mounting base 1232, exhaust gas speed-up fan 1233, lower settler 124, lower sedimentation cylinder 1241, settler output pipe 1242, inclined guide plate 1243, crusher unit mounting bracket 21, high-speed shredder 22 Upper connecting cylinder 23, lower connecting cylinder 24, crushing drive device 25, reducer 251, output wheel 252, high-speed rotating shaft 253, nitrogen circulation structure 261, first circulation pipe 2611, second circulation pipe 2612, circulation connecting pipe 2613, mechanical seal seat 262, inner inlay seat 2621, outer inlay seat 2622, mechanical labyrinth 2623, pressure boosting guide 263, annular separation cover 2631, sealing plate 2632, connecting plate 2633, guide plate 2634, climbing conveyor belt 31, inlet and outlet sealing structure 32, double slide valve 321, flap valve 322. Detailed Implementation

[0035] All embodiments of the present invention are intended to fall within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating that the purpose, technical solution, and advantages of the method are clearer. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort indicate or imply the relative importance of the indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] Reference Figures 1 to 13As shown, a multi-stage battery crushing device includes: a climbing conveyor belt 31, the discharge end of which is connected to a battery crushing structure; a tail gas treatment device is installed on the top of the battery crushing structure; and inlet and outlet sealing structures 32 are provided at the upper and lower ends of the battery crushing structure. The battery crushing structure includes a high-speed shredder 22 mounted on a crusher unit mounting frame 21. An upper connecting cylinder 23 is installed at the upper end of the high-speed shredder 22, and a lower connecting cylinder 24 is installed at the lower end of the high-speed shredder 22. The upper end of the upper connecting cylinder 23 is connected to a feeding mechanism. A circulating sealing structure includes a nitrogen circulation structure 261 disposed between the upper connecting cylinder 23 and the lower connecting cylinder 24. A mechanical seal seat 26 is provided on the insertion port. 2. A pressurizing guide 263 is provided at the upper and lower ends of the high-speed shredder 22. After pressurization, the nitrogen gas is guided by the pressurizing guide 263 and then circulates rapidly in the nitrogen gas circulation structure 261. The exhaust gas treatment device includes an upper exhaust gas duct 10 provided at the upper end of the upper connecting cylinder 23. The upper exhaust gas duct 10 is connected to a processor 11. The sedimentation separation structure 12 includes an extension pipe 121 connected to the processor 11. The end of the extension pipe 121 is connected to a rotary sedimentator 122. The outlet end of the rotary sedimentator 122 is connected to an exhaust gas acceleration structure 123. The exhaust gas acceleration structure 123 outputs to a lower sedimentator 124. After sedimentation in the lower sedimentator 124, the exhaust gas is connected to the burner through a combustion pipe.

[0038] Existing exhaust gases actually contain some flammable oily substances, which may cause the combustion equipment to explode after being drawn into it. If the explosion is too violent, it can easily cause an accident. Therefore, the present invention uses a sedimentation separation structure 12, which first intercepts the solid particles in the exhaust gas through the processor 11, and then draws the remaining exhaust gas to the rotary settler 122 through the exhaust gas speed-up structure 123, so that the oily substances are settled in the bending area of ​​the rotary settler 122. After secondary sedimentation in the lower settler 124, most of the oily substances in the gas are removed, so that the gas entering the burner contains less oily substances and is safer.

[0039] Some existing equipment circulates nitrogen to reduce nitrogen input costs, but nitrogen still leaks from the feed and power output points, making it difficult to reduce nitrogen usage costs. Therefore, this invention, through a circulatory sealing structure, firstly, sets up a pressurized nitrogen circulation structure 261 at the positions of the upper connecting cylinder 23 and the lower connecting cylinder 24, allowing nitrogen to circulate continuously under pressure in the high-speed shredder 22. Since the nitrogen is pressurized, it is prone to leaking from the power installation port of the high-speed shredder 22. Therefore, this invention also sets up a mechanical seal seat 262 at the insertion port of the high-speed shredder 22 to seal this position. Even if the pressurized nitrogen leaks when flowing through this position, the leakage amount is very small and can be almost negligible relative to the total amount.

[0040] The present invention provides an inlet and outlet sealing structure 32 at the feeding and discharging positions, which can seal the isolation chambers at the feeding and discharging positions respectively through the double slide valve 321 and the flap valve 322, thereby preventing gas from leaking into the outside area during feeding and discharging, thus ensuring the internal sealing effect.

[0041] During the nitrogen pressurization process, if nitrogen is directly introduced to the upper connecting cylinder 23 and the lower connecting cylinder 24, although there is no leakage due to the inlet and outlet sealing structure 32, once the inlet and outlet sealing structure 32 is opened for feeding or discharging, this gas will still rush into the partition of the inlet and outlet sealing structure 32. Therefore, the present invention, through the setting of the pressurization guide 263, can form a sealed guide surface during the crushing stage, and can be pushed open by the gravity of the battery during feeding. This allows nitrogen to avoid a portion of the gas from entering the upper connecting cylinder 23 and the lower connecting cylinder 24 during the high-pressure self-circulation process, forming a better gas isolation environment, improving the nitrogen retention rate, and not hindering the normal feeding of the battery.

[0042] The pressurizing guide 263 is located in the middle section between the upper connecting cylinder 23 and the lower connecting cylinder 24. Specifically, the pressurizing guide 263 includes an annular separation cover 2631 disposed on the upper connecting cylinder 23 and the lower connecting cylinder 24. The annular separation cover 2631 is connected to an external air passage. A sealing plate 2632 is connected to the inner side of the annular separation cover 2631. A connecting plate 2633 is disposed between the sealing plates 2632. When the battery is fed, the sealing plate 2632 hangs down naturally. When the high-speed shredder 22 crushes the battery, the sealing plate 2632 is inflated and... The connecting piece 2633 forms a sealing guide, which not only allows space for the upper connecting cylinder 23 and the lower connecting cylinder 24 to install the first circulation pipe 2611 and the second circulation pipe 2612, but also seals the position of the upper connecting cylinder 23 and the lower connecting cylinder 24 above the circulation pipe. After the nitrogen is introduced, it can circulate quickly without any stagnation, maintaining a high-speed circulation state. The connecting piece 2633 is a magnetic piece. The attraction force generated between adjacent connecting pieces 2633 can resist the impact of nitrogen circulation, but can be separated when squeezed by the battery.

[0043] Existing exhaust gases actually contain some flammable oily substances, which may cause the combustion equipment to explode after being drawn into it. If the explosion is too violent, it can easily cause an accident. Therefore, the present invention uses a sedimentation separation structure 12, which first intercepts the solid particles in the exhaust gas through the processor 11, and then draws the remaining exhaust gas to the rotary settler 122 through the exhaust gas speed-up structure 123, so that the oily substances are settled in the bending area of ​​the rotary settler 122. After secondary sedimentation in the lower settler 124, most of the oily substances in the gas are removed, so that the gas entering the burner contains less oily substances and is safer.

[0044] In this embodiment, the processor 11 is a bag filter.

[0045] When a bag filter is used for filtration, particles will be trapped in the filter bag, and the filter bag will become clogged after continuous use. Therefore, the upper exhaust gas duct 10 of this embodiment includes an upper guide pipe 101 connected to the battery crushing device. The bottom of the upper guide pipe 101 extends to the top of the processor 11, and a backflush pipe 102 is connected to the middle section of the upper guide pipe 101. After a period of use, the backflush pipe 102 in the upper exhaust gas duct 10 will back-suction the inside of the processor 11, thereby extracting the particles on the filter bag. The internal cleaning can be achieved without disassembling the equipment.

[0046] Although the bag filter filters solid particulate matter, other oily substances in the exhaust gas cannot be effectively treated. Therefore, the rotary settler 122 in this embodiment includes a first turning section 1221 connected to the extension pipe 121. The lower end of the first turning section 1221 is connected to a settling section 1222. The outlet of the settling section 1222 is connected to a second turning section 1223. The second turning section 1223 is connected to the exhaust gas speed-up structure 123. The rotary settler 122 is set at the end of the extension pipe 121. The first turning section 1221, the settling section 1222, and the second turning section 1223 are combined to form a U-shaped pipe structure, forming a water trap structure, allowing oily substances to accumulate at the bottom of the U-shaped pipe, while the gas continues to pass through, thereby allowing the oily substances in the electrolyte to settle at this position, improving the safety of the downstream.

[0047] In order to allow the material deposited in the sedimentation section 1222 to be discharged smoothly, a sedimentation discharge pipe 1224 is connected to the lower end of the sedimentation section 1222 in this embodiment. The sedimentation discharge pipe 1224 is controlled by a discharge valve 1225, which can periodically output the precipitated electrolyte for separate processing.

[0048] To ensure the exhaust gas passes through the device quickly and prevents more substances from accumulating inside the pipe during slow passage, the exhaust gas acceleration structure 123 in this embodiment includes a fan mounting bracket 1231. A fan mounting base 1232 is provided on the fan mounting bracket 1231, and an exhaust gas acceleration fan 1233 is provided on the fan mounting base 1232. The outlet end of the rotary settler 122 is connected to the inlet end of the exhaust gas acceleration fan 1233, and the outlet end of the exhaust gas acceleration fan 1233 is embedded in the lower settler 124. The exhaust gas acceleration fan 1233 is located at the rear end of the rotary settler 122. The exhaust gas acceleration fan 1233 accelerates the separated exhaust gas, allowing it to quickly reach the burner. Furthermore, the oily substances flowing down after the exhaust gas acceleration fan 1233 stops will flow back into the U-shaped tube structure of the rotary settler 122, thus forming a virtuous cycle.

[0049] The exhaust gas speed-increasing fan 1233 should not be directly connected to the burner, otherwise it will be easily affected. Therefore, the lower sedimentation tank 124 in this embodiment includes a lower sedimentation cylinder 1241 set on the fan mounting bracket 1231. The lower half of the outer periphery of the lower sedimentation cylinder 1241 is connected to a sedimentation tank output pipe 1242, which can be used for over-isolation.

[0050] If a second sedimentation is performed at the lower sedimentation cylinder 1241, the sedimentation effect of liquid substances in the exhaust gas will be more easily improved. Therefore, in this embodiment, an inclined guide plate 1243 is provided inside the lower sedimentation cylinder 1241. The inclined guide plate 1243 has several holes. The bottom of the inclined guide plate 1243 is flush with the air inlet end of the sedimentator output pipe 1242. The downward-rushing exhaust gas will first come into contact with the inclined guide plate 1243, and the liquid sediment will accumulate at the bottom, while the gas will be discharged from the sedimentator output pipe 1242, thus achieving secondary sedimentation.

[0051] Some existing equipment circulates nitrogen to reduce nitrogen input costs. However, nitrogen still leaks from the feed and power output points, making it difficult to reduce nitrogen usage costs. Therefore, this embodiment uses a circulating sealing structure. First, a pressurized nitrogen circulation structure 261 is set at the positions of the upper connecting cylinder 23 and the lower connecting cylinder 24, allowing nitrogen to circulate continuously under pressure in the high-speed shredder 22. Since the nitrogen is pressurized, it is easy for it to leak from the power installation port of the high-speed shredder 22. Therefore, this embodiment also sets a mechanical seal seat 262 at the insertion port of the high-speed shredder 22 to seal this position. Even if the pressurized nitrogen leaks when flowing through this position, the leakage amount is very small and can be almost negligible relative to the total amount.

[0052] Furthermore, the nitrogen circulation structure 261 includes a first circulation pipe 2611 disposed on the side of the upper connecting cylinder 23, and a second circulation pipe 2612 disposed on the side of the lower connecting cylinder 24. The first circulation pipe 2611 and the second circulation pipe 2612 are connected by a circulation connecting pipe 2613, so that the upwardly overflowing nitrogen and some harmful gases can be drawn into the circulation connecting pipe 2613 through the first circulation pipe 2611, and then transported back to the lower connecting cylinder 24 and into the high-speed shredder 22 through the second circulation pipe 2612, thereby realizing the circulation of nitrogen.

[0053] Furthermore, the angle between the first circulation pipe 2611, the second circulation pipe 2612 and the horizontal plane is 120° to 150°, so that some of the fluid or particulate matter entrained in the gas can flow back into the upper connecting cylinder 23 and the lower connecting cylinder 24.

[0054] Furthermore, the crushing drive device 25 includes a reducer 251 mounted on the crusher unit mounting frame 21. The reducer 251 is connected to an output wheel 252 via a belt. The output wheel 252 is connected to a high-speed rotating shaft 253 that passes through the high-speed shredder 22. The reducer 251 drives the output wheel 252 to rotate, which in turn drives the high-speed rotating shaft 253 to rotate, thereby enabling the crushing roller mounted on the high-speed rotating shaft 253 to crush the battery.

[0055] Since the high-speed rotating shaft 253 passes through the high-speed shredder 22, it will inevitably leave some space. Therefore, the mechanical seal seat 262 in this embodiment includes an inner inlay seat 2621 embedded in the inlay ports on both sides of the high-speed shredder 22. An outer inlay seat 2622 is locked and fixed on the side of the inner inlay seat 2621 away from the high-speed shredder 22. The large inlay port is blocked by the inner inlay seat 2621. At the same time, in order to avoid frictional contact with the high-speed rotating shaft 253, a mechanical labyrinth 2623 is provided inside the inner inlay seat 2621. The mechanical labyrinth 2623 greatly restricts the path of gas moving outward, thereby reducing nitrogen leakage.

[0056] In this embodiment, an inlet and outlet sealing structure 32 is provided at the feeding and discharging positions. The double slide valve 321 and the flap valve 322 can respectively seal the isolation chambers at the feeding and discharging positions, thereby preventing gas from leaking into the outside area during feeding and discharging, thus ensuring the internal sealing effect.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A multi-stage battery crushing device, characterized in that, include: A climbing conveyor belt (31) is connected to a battery crushing structure at the discharge end of the climbing conveyor belt (31). A tail gas treatment device is provided on the top of the battery crushing structure. An inlet and outlet closed structure (32) is provided at the upper and lower ends of the battery crushing structure. The battery crushing structure includes a high-speed shredder (22) mounted on a crusher unit mounting frame (21). An upper connecting cylinder (23) is mounted on the upper end of the high-speed shredder (22), and a lower connecting cylinder (24) is mounted on the lower end of the high-speed shredder (22). The upper end of the upper connecting cylinder (23) is connected to the feeding mechanism. The circulating sealing structure includes a nitrogen circulation structure (261) disposed between the upper connecting cylinder (23) and the lower connecting cylinder (24). A mechanical seal seat (262) is provided on the insertion port of the high-speed shredder (22). A pressure boosting guide (263) is provided at the upper and lower ends inside the high-speed shredder (22). After being pressurized, the nitrogen gas is guided by the pressure boosting guide (263) and then circulates rapidly in the nitrogen circulation structure (261). The exhaust gas treatment device includes an upper exhaust gas duct (10) disposed at the upper end of the upper connecting cylinder (23), the upper exhaust gas duct (10) being connected to a processor (11); a sedimentation separation structure (12) including an extension pipe (121) connected to the processor (11), the end of the extension pipe (121) being connected to a rotary sedimentator (122), the outlet end of the rotary sedimentator (122) being connected to an exhaust gas acceleration structure (123), the exhaust gas acceleration structure (123) being output to a lower sedimentator (124), and the exhaust gas being precipitated by the lower sedimentator (124) and then connected to a burner through a combustion pipe.

2. The multi-stage battery crushing device according to claim 1, characterized in that, The inlet and outlet sealing structure (32) includes a double slide valve (321) disposed on the top of the upper connecting cylinder (23), and a flap valve (322) disposed at the lower end of the lower connecting cylinder (24).

3. The multi-stage battery crushing device according to claim 1, characterized in that, The pressurizing guide (263) includes an annular separation cover (2631) disposed on the upper connecting cylinder (23) and the lower connecting cylinder (24). The annular separation cover (2631) is connected to the external air passage. A sealing plate (2632) is connected to the inner side of the annular separation cover (2631). A connecting plate (2633) is disposed between the sealing plates (2632). When the battery is fed, the sealing plate (2632) hangs down naturally. When the high-speed shredder (22) crushes the battery, the sealing plate (2632) is inflated and connected by the connecting plate (2633) to form a sealing surface guide.

4. The multi-stage battery crushing device according to claim 1, characterized in that, The rotary settler (122) includes a first turning section (1221) connected to an extension pipeline (121). The lower end of the first turning section (1221) is connected to a settling section (1222). The outlet of the settling section (1222) is connected to a second turning section (1223). The second turning section (1223) is connected to the exhaust gas speed-up structure (123). The lower end of the settling section (1222) is connected to a settling discharge pipe (1224). The settling discharge pipe (1224) is controlled by a discharge valve (1225).

5. The multi-stage battery crushing device according to claim 1, characterized in that, The exhaust gas speed-up structure (123) includes a fan mounting bracket (1231), a fan mounting seat (1232) is provided on the fan mounting bracket (1231), an exhaust gas speed-up fan (1233) is provided on the fan mounting seat (1232), the outlet end of the rotary sedimentation tank (122) is inserted into the inlet end of the exhaust gas speed-up fan (1233), and the outlet end of the exhaust gas speed-up fan (1233) is inserted into the lower sedimentation tank (124).

6. The multi-stage battery crushing device according to claim 1, characterized in that, The lower sedimentation tank (124) includes a lower sedimentation cylinder (1241) mounted on a fan mounting bracket (1231). The lower half of the outer periphery of the lower sedimentation cylinder (1241) is connected to a sedimentation tank output pipe (1242). An inclined guide plate (1243) is provided inside the lower sedimentation cylinder (1241). Several holes are provided on the inclined guide plate (1243). The bottom of the inclined guide plate (1243) is flush with the air inlet end of the sedimentation tank output pipe (1242).

7. The multi-stage battery crushing device according to claim 1, characterized in that, The nitrogen circulation structure (261) includes a first circulation pipe (2611) disposed on the side of the upper connecting cylinder (23), and a second circulation pipe (2612) is connected to the side of the lower connecting cylinder (24). The first circulation pipe (2611) and the second circulation pipe (2612) are connected by a circulation connecting pipe (2613). The angle between the first circulation pipe (2611), the second circulation pipe (2612) and the horizontal plane is 120° to 150°.

8. The multi-stage battery crushing device according to claim 1, characterized in that, The high-speed shredder (22) is driven by a crushing drive device (25), which includes a reducer (251) mounted on the crusher assembly mounting frame (21). The reducer (251) is connected to an output wheel (252) via a belt. The output wheel (252) is connected to a high-speed rotating shaft (253) that passes through the high-speed shredder (22).

9. A multi-stage battery crushing device according to claim 1, characterized in that, The mechanical seal seat (262) includes an inner inlay seat (2621) embedded in the inlay ports on both sides of the high-speed shredder (22), and an outer inlay seat (2622) is locked and fixed on the side of the inner inlay seat (2621) away from the high-speed shredder (22).

10. A multi-stage battery crushing device according to claim 9, characterized in that, The interior of the inlay (2621) is provided with a mechanical labyrinth (2623).

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