A high-temperature flue gas cooling system for a lithium battery production line

Abstract

This utility model discloses a high-temperature flue gas cooling system for a lithium battery crushing production line, belonging to the field of lithium battery recycling. It includes a main cooling circulation loop for combined gradient cooling of high-temperature materials and high-temperature flue gas; a backup cooling pipeline for high-temperature flue gas; a backup cooling pipeline for high-temperature materials; an emergency bypass for injecting new cooling capacity into the main cooling circulation loop; and a flow control and temperature monitoring module for controlling the on / off state of each pipeline and monitoring its temperature. Compared to the current production lines that simply cool materials, this utility model, by setting up a multi-functional cooling circulation loop, solves the problems of poor cooling effect and low cooling efficiency of high-temperature materials and high-temperature flue gas after high-temperature lithium battery treatment, which can easily lead to equipment damage.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery recycling technology, and in particular to a high-temperature flue gas cooling system for a broken lithium battery production line. Background Technology

[0002] The rapid development of new energy vehicles in my country has led to the rapid development of the lithium battery industry. With the large-scale use of battery facilities and equipment, especially electric vehicles, the harmless treatment and resource reuse of waste lithium batteries has become an urgent issue.

[0003] In existing waste battery recycling equipment and lithium battery crushing production lines, combustion or high-temperature processing is used to effectively remove battery separators and other debris. This results in the production of high-temperature materials and high-temperature flue gas. Most existing production lines only perform simple heat exchange and cooling on the high-temperature materials, but are ineffective in handling the high-temperature material conveying parts and high-temperature flue gas. This leads to damage to the high-temperature material conveying devices, preventing continuous operation of the equipment. High-temperature flue gas directly enters the venous dust collector, causing frequent malfunctions of the windproof device and the venous dust collector, making it impossible to operate continuously for extended periods. Utility Model Content

[0004] The purpose of this invention is to provide a high-temperature flue gas cooling system for a lithium battery crushing production line. Compared with the current production line that simply cools materials, this system solves the problems of poor cooling effect and low cooling efficiency of high-temperature materials and high-temperature flue gas after high-temperature treatment of lithium batteries, which can easily cause equipment damage, by setting up a multi-functional cooling circulation loop.

[0005] To achieve the above objectives, this utility model provides a high-temperature flue gas cooling system for a crushed lithium battery production line, including a main cooling circulation loop for combined gradient cooling circulation of high-temperature materials and high-temperature flue gas; a high-temperature flue gas backup cooling pipeline for backup cooling circulation of high-temperature flue gas; a high-temperature material backup cooling pipeline for backup cooling circulation of high-temperature materials; an emergency bypass for injecting new cooling capacity into the main cooling circulation loop; and a flow on / off and temperature monitoring module for on / off control and temperature monitoring of each pipeline.

[0006] The main cooling circulation loop includes a high-temperature material cooling inlet pipe, one end of which is connected to the cooling pipe of the high-temperature material screw conveyor, the cooling pipe of the high-temperature material screw conveyor is connected to one end of the high-temperature material cooling outlet pipe, the other end of the high-temperature material cooling outlet pipe is connected to one end of the high-temperature flue gas cooling inlet pipe via a cooling tower, the other end of the high-temperature flue gas cooling inlet pipe is connected to the cooling pipe of the high-temperature flue gas conveying mechanism, the cooling pipe of the high-temperature flue gas conveying mechanism is connected to one end of the high-temperature flue gas cooling outlet pipe, and the other end of the high-temperature flue gas cooling outlet pipe is connected to the other end of the high-temperature material cooling inlet pipe.

[0007] Preferably, a pressure tank and a heat exchanger are installed at the connection between the other end of the high-temperature flue gas cooling outlet pipe and the other end of the high-temperature material cooling inlet pipe. A delivery pump for conveying cooling liquid is installed on the main cooling circulation loop, the high-temperature flue gas backup cooling pipeline, the high-temperature material backup cooling pipeline, and the emergency bypass.

[0008] Preferably, one end of the emergency bypass is connected to the cooling tower, and the other end of the emergency bypass is connected to the heat exchanger through the cold air inlet pipe.

[0009] Preferably, the high-temperature flue gas backup cooling pipeline includes a high-temperature flue gas backup inlet pipe and a high-temperature flue gas backup outlet pipe. The two ends of the high-temperature flue gas backup inlet pipe are respectively connected to the cooling tower and the cooling pipeline of the high-temperature flue gas conveying mechanism, and the two ends of the high-temperature flue gas backup outlet pipe are respectively connected to the cooling pipeline of the high-temperature flue gas conveying mechanism and the pressure tank.

[0010] Preferably, the high-temperature material backup cooling pipeline includes a high-temperature material backup inlet pipe and a high-temperature material backup outlet pipe. The two ends of the high-temperature material backup inlet pipe are respectively connected to the cooling pipeline of the high-temperature flue gas conveying mechanism and the emergency bypass. The two ends of the high-temperature material backup outlet pipe are respectively connected to the emergency bypass and the cooling pipeline of the high-temperature flue gas conveying mechanism.

[0011] Preferably, a backup pipe is provided on the emergency bypass, with its two ends connected to the emergency bypass and the pressure tank, respectively.

[0012] Preferably, the flow on / off and temperature monitoring module includes a control valve assembly and a temperature monitoring assembly. The control valve assembly includes: a control valve 1 installed on the high-temperature material cooling inlet pipe; a control valve 2 installed on the high-temperature material cooling outlet pipe; a control valve 3 installed on the high-temperature flue gas cooling inlet pipe; a control valve 4 installed on the high-temperature flue gas cooling outlet pipe; a control valve 5 installed on the cooling inlet pipe; a control valve 6 installed on the standby pipe; a control valve 7 installed on the high-temperature flue gas standby inlet pipe; a control valve 8 installed on the high-temperature material standby inlet pipe; and a control valve 9 installed on the high-temperature material standby outlet pipe.

[0013] The temperature monitoring component includes several temperature sensors, which are respectively installed on the high-temperature material cooling inlet pipe, the high-temperature material cooling outlet pipe, the high-temperature flue gas cooling inlet pipe, the high-temperature flue gas cooling outlet pipe, the cold energy inlet pipe, the spare pipe, the high-temperature flue gas spare inlet pipe, the high-temperature flue gas spare outlet pipe, the high-temperature material spare inlet pipe, and the high-temperature material spare outlet pipe.

[0014] Preferably, the high-temperature material screw conveyor includes a screw conveyor with a feed inlet. The outer shell of the screw conveyor includes an outer shell and an inner shell. Several cooling pipes are evenly distributed between the outer shell and the inner shell. The cooling pipes are arranged along the conveying direction of the high-temperature material. Both ends of the cooling pipes are connected to annular pipes. The annular pipe near the feed inlet is connected to a coolant inlet, and the annular pipe away from the feed inlet is connected to a coolant outlet. The cooling pipes, annular pipes, coolant inlet, and coolant outlet constitute the cooling pipeline of the high-temperature material screw conveyor.

[0015] Preferably, the high-temperature flue gas conveying mechanism includes a high-temperature flue gas conveying pipe, an outer pipe covering the high-temperature flue gas conveying pipe, a cooling chamber between the outer pipe and the high-temperature flue gas conveying pipe, and a coolant inlet and a coolant outlet connected to both ends of the cooling chamber, respectively. The cooling chamber, the coolant inlet, and the coolant outlet constitute the cooling pipeline of the high-temperature flue gas conveying mechanism.

[0016] This utility model provides a cooling method for a high-temperature flue gas cooling system in a crushed lithium battery production line, including a main cooling cycle method, a high-temperature flue gas backup cooling cycle method, a high-temperature material backup cooling cycle method, and a dual backup cycle method.

[0017] The main cooling cycle method includes the following steps:

[0018] Open control valve 1, control valve 2, control valve 3, and control valve 4; close control valve 5, control valve 6, control valve 7, control valve 8, control valve 9, and control valve 10. The cooling liquid enters the cooling pipe through the high-temperature material cooling inlet pipe to cool the high-temperature material during the conveying process. After cooling, it enters the cooling tower through the high-temperature material cooling outlet pipe for further cooling. The cooled liquid then enters the cooling chamber through the high-temperature flue gas cooling inlet pipe to cool the high-temperature flue gas. Finally, it flows through the high-temperature flue gas cooling outlet pipe sequentially through the pressure tank and heat exchanger, and then circulates back to the high-temperature material cooling inlet pipe.

[0019] If the temperature of the coolant flowing out of the high-temperature flue gas cooling outlet pipe is higher than the set value, control valve five opens, and the coolant in the cooling tower enters the heat exchanger through the emergency bypass and the cold energy inlet pipe in sequence to cool the coolant flowing out of the high-temperature flue gas cooling outlet pipe.

[0020] The high-temperature flue gas standby cooling circulation method includes the following steps:

[0021] Open control valve 1, control valve 2, control valve 7, and control valve 8; close control valve 5, control valve 6, control valve 3, control valve 4, control valve 9, and control valve 10. The cooling liquid enters the cooling pipe through the high-temperature material cooling inlet pipe to cool the high-temperature material during the conveying process. After cooling, it enters the cooling tower through the high-temperature material cooling outlet pipe for further cooling. The cooled liquid then enters the cooling chamber through the high-temperature flue gas standby inlet pipe to cool the high-temperature flue gas. Finally, it flows through the high-temperature flue gas standby outlet pipe sequentially through the pressure tank and heat exchanger, and then circulates back to the high-temperature material cooling inlet pipe.

[0022] The method for cooling circulation of high-temperature materials includes the following steps:

[0023] Open control valves 3, 4, 6, 9, and 10; close control valves 5, 1, 2, 7, and 8. The cooling liquid in the emergency bypass enters the cooling pipe through the high-temperature material backup inlet pipe to cool the high-temperature material during the transportation process. After cooling, it flows back to the emergency bypass through the high-temperature material backup outlet pipe and then enters the cooling tower through the emergency bypass for further cooling. The cooled liquid then enters the cooling chamber through the high-temperature flue gas cooling inlet pipe to cool the high-temperature flue gas. After cooling, it flows through the high-temperature flue gas cooling outlet pipe through the pressure tank into the backup pipe and finally returns to the emergency bypass through the backup pipe.

[0024] The dual-standby cycle method includes the following steps:

[0025] Open control valves 6, 7, 8, 9, and 10; close control valves 5, 1, 2, 3, and 4. The cooling liquid in the emergency bypass enters the cooling pipe through the high-temperature material backup inlet pipe to cool the high-temperature material during the transportation process. After cooling, it flows back to the emergency bypass through the high-temperature material backup outlet pipe, and then enters the cooling tower through the emergency bypass for further cooling. The cooled liquid then enters the cooling chamber through the high-temperature flue gas backup inlet pipe to cool the high-temperature flue gas. After cooling, it flows through the pressure tank through the high-temperature flue gas backup outlet pipe into the backup pipe, and finally returns to the emergency bypass through the backup pipe.

[0026] Therefore, the high-temperature flue gas cooling system for a broken lithium battery production line described above has the following beneficial effects:

[0027] This invention solves the problems of poor cooling effect and low cooling efficiency that can easily damage equipment after high-temperature treatment of lithium batteries by setting up a main cooling circulation loop and a backup cooling pipeline for high-temperature flue gas and high-temperature materials. It also enables the cooling operation to continue when the main cooling circulation loop fails, reducing wasted time.

[0028] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall pipeline connection of the system according to an embodiment of the present utility model;

[0030] Figure 2 This is a schematic diagram of the main cooling circulation pipeline connection in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the high-temperature flue gas backup cooling circulation pipeline connection according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the high-temperature material standby cooling circulation pipeline connection according to an embodiment of this utility model;

[0033] Figure 5 This is a schematic diagram of the dual backup circulation pipeline connection according to an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the high-temperature material screw conveyor structure according to an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the cooling pipe structure of the high-temperature material screw conveyor according to an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the cooling pipeline structure of the high-temperature flue gas conveying mechanism according to an embodiment of the present invention.

[0037] Figure Labels

[0038] 1. High-temperature material screw conveyor; 2. Feed inlet; 3. Outer shell; 4. Inner shell; 5. Cooling pipe; 6. Annular pipe; 7. Coolant inlet; 8. Coolant outlet; 9. High-temperature flue gas conveying mechanism; 10. High-temperature flue gas conveying pipeline; 11. Outer pipe; 12. Cooling chamber; 13. Coolant inlet; 14. Coolant outlet; 15. High-temperature material cooling inlet pipe; 16. High-temperature material cooling outlet pipe; 17. Cooling tower; 18. High-temperature flue gas cooling inlet pipe; 19. High-temperature flue gas cooling outlet pipe; 20. Pressure tank; 1. Heat exchanger; 22. Emergency bypass; 23. Cooling inlet pipe; 24. High-temperature flue gas backup inlet pipe; 25. High-temperature flue gas backup outlet pipe; 26. High-temperature material backup inlet pipe; 27. High-temperature material backup outlet pipe; 28. Backup pipe; 29. ​​Control valve one; 30. Control valve two; 31. Control valve three; 32. Control valve four; 33. Control valve five; 34. Control valve six; 35. Control valve seven; 36. Control valve eight; 37. Control valve nine; 38. Control valve ten; 39. Temperature sensor. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the present utility model embodiments clearer, the present utility model embodiments will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model embodiments and are not intended to limit the present utility model embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0040] It should be noted that the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or devices.

[0041] Similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] Example

[0045] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the high-temperature flue gas cooling system for a lithium battery production line of this utility model includes a main cooling circulation loop, five backup cooling pipes for high-temperature flue gas, five backup cooling pipes for high-temperature materials, an emergency bypass 22, and a flow on / off and temperature monitoring module. The main cooling circulation loop is used for combined gradient cooling circulation of high-temperature materials and high-temperature flue gas. The five backup cooling pipes for high-temperature flue gas are used for backup cooling circulation of high-temperature flue gas. The five backup cooling pipes for high-temperature materials are used for backup cooling circulation of high-temperature materials. The emergency bypass 22 is used to inject new cooling capacity into the main cooling circulation loop. The flow on / off and temperature monitoring module is used for on / off control of each pipe and temperature monitoring.

[0046] The main cooling circulation loop includes a high-temperature material cooling inlet pipe 15. One end of the high-temperature material cooling inlet pipe 15 is connected to the cooling pipe 5 of the high-temperature material screw conveyor 1, and the cooling pipe 5 of the high-temperature material screw conveyor 1 is connected to one end of the high-temperature material cooling outlet pipe 16. The other end of the high-temperature material cooling outlet pipe 16 is connected to one end of the high-temperature flue gas cooling inlet pipe 18 via a cooling tower 17. The other end of the high-temperature flue gas cooling inlet pipe 18 is connected to the cooling pipe 5 of the high-temperature flue gas conveying mechanism 9, and the cooling pipe 5 of the high-temperature flue gas conveying mechanism 9 is connected to one end of the high-temperature flue gas cooling outlet pipe 19. The other end of the high-temperature flue gas cooling outlet pipe 19 is connected to the other end of the high-temperature material cooling inlet pipe 15. A pressure tank 20 and a heat exchanger 21 are installed at the connection point between the other end of the high-temperature flue gas cooling outlet pipe 19 and the other end of the high-temperature material cooling inlet pipe 15. Pumps for conveying cooling liquids are installed on the main cooling circulation loop, the high-temperature flue gas backup cooling pipe 5, the high-temperature material backup cooling pipe 5, and the emergency bypass 22.

[0047] The water flowing out from the high-temperature material screw conveyor 1 has a temperature of about 40-60℃ (when the material is cooled to ≤100℃, the water temperature rises by about 15-25℃); the initial temperature of the high-temperature furnace flue gas is about 300-500℃, and it needs to be cooled to below 150℃ through cooling pipe 5 before entering the recovery device. During this process, the temperature of the coolant rises by about 20-30℃, and the outlet water temperature is about 30-40℃ (lower than the material cooling water inlet temperature).

[0048] One end of the emergency bypass 22 is connected to the cooling tower 17, and the other end of the emergency bypass 22 is connected to the heat exchanger 21 through the cold air inlet pipe 23. A spare pipe 28 is provided on the emergency bypass 22, and the two ends of the spare pipe 28 are connected to the emergency bypass 22 and the pressure tank 20, respectively.

[0049] The high-temperature flue gas backup cooling pipe 5 includes a high-temperature flue gas backup inlet pipe 24 and a high-temperature flue gas backup outlet pipe 25. The two ends of the high-temperature flue gas backup inlet pipe 24 are respectively connected to the cooling tower 17 and the high-temperature flue gas conveying mechanism 9 cooling pipe 5. The two ends of the high-temperature flue gas backup outlet pipe 25 are respectively connected to the high-temperature flue gas conveying mechanism 9 cooling pipe 5 and the pressure tank 20.

[0050] The high-temperature material backup cooling pipe 5 includes a high-temperature material backup inlet pipe 26 and a high-temperature material backup outlet pipe 27. The two ends of the high-temperature material backup inlet pipe 26 are respectively connected to the cooling pipe 5 of the high-temperature flue gas conveying mechanism 9 and the emergency bypass 22. The two ends of the high-temperature material backup outlet pipe 27 are respectively connected to the emergency bypass 22 and the cooling pipe 5 of the high-temperature flue gas conveying mechanism 9.

[0051] The flow on / off and temperature monitoring module includes a control valve assembly and a temperature monitoring assembly. The control valve assembly includes control valve 1 (29) installed on the high-temperature material cooling inlet pipe 15, control valve 2 (30) installed on the high-temperature material cooling outlet pipe 16, control valve 3 (31) installed on the high-temperature flue gas cooling inlet pipe 18, control valve 4 (32) installed on the high-temperature flue gas cooling outlet pipe 19, control valve 5 (33) installed on the cooling inlet pipe 23, control valve 6 (34) installed on the standby pipe 28, control valve 7 (35) installed on the high-temperature flue gas standby inlet pipe 24, control valve 8 (36) installed on the high-temperature flue gas standby outlet pipe 25, control valve 9 (37) installed on the high-temperature material standby inlet pipe 26, and control valve 10 (38) installed on the high-temperature material standby outlet pipe 27. The temperature monitoring component includes several temperature sensors 39, which are respectively installed on the high-temperature material cooling inlet pipe 15, the high-temperature material cooling outlet pipe 16, the high-temperature flue gas cooling inlet pipe 18, the high-temperature flue gas cooling outlet pipe 19, the cold energy inlet pipe 23, the spare pipe 28, the high-temperature flue gas spare inlet pipe 24, the high-temperature flue gas spare outlet pipe 25, the high-temperature material spare inlet pipe 26, and the high-temperature material spare outlet pipe 27.

[0052] like Figure 6 , Figure 7 As shown, the high-temperature material screw conveyor 1 includes a screw conveyor with a feed inlet 2. The outer shell 3 of the screw conveyor includes an outer shell 3 and an inner shell 4. Several cooling pipes 5 are evenly distributed between the outer shell 3 and the inner shell 4, and the cooling pipes 5 are arranged along the conveying direction of the high-temperature material. Both ends of the cooling pipes 5 are connected to annular pipes 6. The annular pipe 6 near the feed inlet 2 is connected to a coolant inlet 7, and the annular pipe 6 away from the feed inlet 2 is connected to a coolant outlet 8. The cooling pipes 5, annular pipes 6, coolant inlet 7, and coolant outlet 8 constitute the cooling pipe 5 path of the high-temperature material screw conveyor 1.

[0053] like Figure 8 As shown, the high-temperature flue gas conveying mechanism 9 includes a high-temperature flue gas conveying pipe 10, and an outer pipe 11 is installed on the high-temperature flue gas conveying pipe 10. A cooling chamber 12 is provided between the outer pipe 11 and the high-temperature flue gas conveying pipe 10, and a coolant inlet 13 and a coolant outlet 14 are respectively connected to both ends of the cooling chamber 12. The cooling chamber 12, the coolant inlet 13, and the coolant outlet 14 constitute the cooling pipe 5 of the high-temperature flue gas conveying mechanism 9.

[0054] like Figure 1, Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the cooling method of the high-temperature flue gas cooling system of the crushed lithium battery production line of this utility model includes a main cooling cycle method, a high-temperature flue gas backup cooling cycle method, a high-temperature material backup cooling cycle method, and a dual backup cycle method.

[0055] The main cooling cycle method includes the following steps:

[0056] Open control valves 1-29, 2-30, 3-31, and 4-32; close control valves 5-33, 6-34, 7-35, 8-36, 9-37, and 10-38. Cooling liquid enters cooling pipe 5 through high-temperature material cooling inlet pipe 15 to cool the high-temperature material during transport. Then, it enters cooling tower 17 through high-temperature material cooling outlet pipe 16 for further cooling. The cooled liquid then enters cooling chamber 12 through high-temperature flue gas cooling inlet pipe 18 to cool the high-temperature flue gas. Finally, it flows through high-temperature flue gas cooling outlet pipe 19, sequentially passing through pressure tank 20 and heat exchanger 21, before circulating back to high-temperature material cooling inlet pipe 15.

[0057] If the temperature of the coolant flowing out of the high-temperature flue gas cooling outlet pipe 19 is higher than the set value, the control valve 5 33 opens, and the coolant in the cooling tower 17 enters the heat exchanger 21 through the emergency bypass 22 and the cold energy inlet pipe 23 in sequence to cool the coolant flowing out of the high-temperature flue gas cooling outlet pipe 19.

[0058] The high-temperature flue gas standby cooling circulation method includes the following steps:

[0059] After the high-temperature flue gas cooling inlet pipe 18 and the high-temperature flue gas cooling outlet pipe 19 are damaged, control valves 1-29, 2-30, 7-35, and 8-36 are opened, and control valves 5-33, 6-34, 3-31, 4-32, 9-37, and 10-38 are closed. Cooling liquid enters cooling pipe 5 through high-temperature material cooling inlet pipe 15 to cool the high-temperature material during transport, and then enters cooling tower 17 through high-temperature material cooling outlet pipe 16 for further cooling. The cooled liquid then enters cooling chamber 12 through high-temperature flue gas backup inlet pipe 24 to cool the high-temperature flue gas, and then flows through pressure tank 20 and heat exchanger 21 through high-temperature flue gas backup outlet pipe 25, circulating back to high-temperature material cooling inlet pipe 15.

[0060] The method for cooling circulation of high-temperature materials includes the following steps:

[0061] After the high-temperature material cooling inlet pipe 15 and the high-temperature material cooling outlet pipe 16 are damaged, control valves 31, 32, 34, 37, and 38 are opened, and control valves 33, 29, 30, 35, and 36 are closed. The cooling liquid in the emergency bypass 22 enters the cooling pipe 5 through the high-temperature material backup inlet pipe 26 to cool the high-temperature material during the conveying process. Then, it flows back to the emergency bypass 22 through the high-temperature material backup outlet pipe 27 and then enters the cooling tower 17 for further cooling. The cooled liquid then enters the cooling chamber 12 through the high-temperature flue gas cooling inlet pipe 18 to cool the high-temperature flue gas. After that, it flows through the high-temperature flue gas cooling outlet pipe 19, passes through the pressure tank 20, enters the backup pipe 28, and finally returns to the emergency bypass 22 through the backup pipe 28.

[0062] The dual-standby cycle method includes the following steps:

[0063] After the high-temperature flue gas cooling inlet pipe 18, high-temperature flue gas cooling outlet pipe 19, high-temperature material cooling inlet pipe 15, and high-temperature material cooling outlet pipe 16 are all damaged, control valves 6-34, 7-35, 8-36, 9-37, and 10-38 are opened, and control valves 5-33, 1-29, 2-30, 3-31, and 4-32 are closed. The cooling liquid in the emergency bypass 22 enters the cooling pipe 5 through the high-temperature material backup inlet pipe 26 to cool the high-temperature material during the transportation process, and then flows back to the emergency bypass 22 through the high-temperature material backup outlet pipe 27, and then enters the cooling tower 17 through the emergency bypass 22 for further cooling; the cooled liquid enters the cooling chamber 12 through the high-temperature flue gas backup inlet pipe 24 to cool the high-temperature flue gas, and then flows through the high-temperature flue gas backup outlet pipe 25 through the pressure tank 20 into the backup pipe 28, and finally returns to the emergency bypass 22 through the backup pipe 28.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A high temperature flue gas cooling system for breaking down lithium battery production lines, characterized by: It includes a main cooling circulation loop for combined gradient cooling of high-temperature materials and high-temperature flue gas; a backup cooling pipeline for high-temperature flue gas; a backup cooling pipeline for high-temperature materials; an emergency bypass for injecting new cooling capacity into the main cooling circulation loop; and a flow on / off and temperature monitoring module for on / off control and temperature monitoring of each pipeline. The main cooling circulation loop includes a high-temperature material cooling inlet pipe, one end of which is connected to the cooling pipe of the high-temperature material screw conveyor, the cooling pipe of the high-temperature material screw conveyor is connected to one end of the high-temperature material cooling outlet pipe, the other end of the high-temperature material cooling outlet pipe is connected to one end of the high-temperature flue gas cooling inlet pipe via a cooling tower, the other end of the high-temperature flue gas cooling inlet pipe is connected to the cooling pipe of the high-temperature flue gas conveying mechanism, the cooling pipe of the high-temperature flue gas conveying mechanism is connected to one end of the high-temperature flue gas cooling outlet pipe, and the other end of the high-temperature flue gas cooling outlet pipe is connected to the other end of the high-temperature material cooling inlet pipe.

2. The high-temperature flue gas cooling system for a broken lithium battery production line according to claim 1, characterized in that: A pressure tank and a heat exchanger are installed at the connection between the other end of the high-temperature flue gas cooling outlet pipe and the other end of the high-temperature material cooling inlet pipe. A transfer pump for conveying cooling liquid is installed on the main cooling circulation loop, the high-temperature flue gas backup cooling pipeline, the high-temperature material backup cooling pipeline, and the emergency bypass.

3. The high-temperature flue gas cooling system for a broken lithium battery production line according to claim 2, characterized in that: One end of the emergency bypass is connected to the cooling tower, and the other end is connected to the heat exchanger through the cold air inlet pipe.

4. The high temperature lithium battery production line smoke cooling system according to claim 3, wherein: The high-temperature flue gas backup cooling pipeline includes a high-temperature flue gas backup inlet pipe and a high-temperature flue gas backup outlet pipe. The two ends of the high-temperature flue gas backup inlet pipe are connected to the cooling tower and the cooling pipeline of the high-temperature flue gas conveying mechanism, respectively. The two ends of the high-temperature flue gas backup outlet pipe are connected to the cooling pipeline of the high-temperature flue gas conveying mechanism and the pressure tank, respectively.

5. The high temperature lithium battery production line smoke cooling system according to claim 4, wherein: The high-temperature material backup cooling pipeline includes a high-temperature material backup inlet pipe and a high-temperature material backup outlet pipe. The two ends of the high-temperature material backup inlet pipe are respectively connected to the cooling pipeline of the high-temperature flue gas conveying mechanism and the emergency bypass. The two ends of the high-temperature material backup outlet pipe are respectively connected to the emergency bypass and the cooling pipeline of the high-temperature flue gas conveying mechanism.

6. The high temperature fume cooling system for breaking lithium battery production line of claim 5, wherein: A backup pipe is installed on the emergency bypass, with its two ends connected to the emergency bypass and the pressure tank, respectively.

7. The high temperature lithium battery production line smoke cooling system according to claim 6, wherein: The flow on / off and temperature monitoring module includes a control valve assembly and a temperature monitoring assembly. The control valve assembly includes: control valve 1 on the high-temperature material cooling inlet pipe; control valve 2 on the high-temperature material cooling outlet pipe; control valve 3 on the high-temperature flue gas cooling inlet pipe; control valve 4 on the high-temperature flue gas cooling outlet pipe; control valve 5 on the cooling inlet pipe; control valve 6 on the standby pipe; control valve 7 on the high-temperature flue gas standby inlet pipe; control valve 8 on the high-temperature material standby inlet pipe; and control valve 9 on the high-temperature material standby outlet pipe. The temperature monitoring component includes several temperature sensors, which are respectively installed on the high-temperature material cooling inlet pipe, the high-temperature material cooling outlet pipe, the high-temperature flue gas cooling inlet pipe, the high-temperature flue gas cooling outlet pipe, the cold energy inlet pipe, the spare pipe, the high-temperature flue gas spare inlet pipe, the high-temperature flue gas spare outlet pipe, the high-temperature material spare inlet pipe, and the high-temperature material spare outlet pipe.

8. The high temperature lithium battery production line smoke cooling system of claim 7, wherein: The high-temperature material screw conveyor includes a screw conveyor with a feed inlet. The outer shell of the screw conveyor consists of an outer shell and an inner shell. Several cooling pipes are evenly distributed between the outer shell and the inner shell. The cooling pipes are arranged along the conveying direction of the high-temperature material. Both ends of the cooling pipes are connected to annular pipes. The annular pipes near the feed inlet are connected to a coolant inlet, and the annular pipes away from the feed inlet are connected to a coolant outlet. The cooling pipes, annular pipes, coolant inlet, and coolant outlet constitute the cooling pipeline of the high-temperature material screw conveyor.

9. The high temperature lithium battery production line smoke cooling system of claim 8, wherein: The high-temperature flue gas conveying mechanism includes a high-temperature flue gas conveying pipe, an outer pipe covering the high-temperature flue gas conveying pipe, and a cooling chamber between the outer pipe and the high-temperature flue gas conveying pipe. The two ends of the cooling chamber are respectively connected to a coolant inlet and a coolant outlet. The cooling chamber, the coolant inlet, and the coolant outlet constitute the cooling pipeline of the high-temperature flue gas conveying mechanism.

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