Roasting equipment for recycling positive plate of lithium phosphate battery

Abstract

The invention discloses roasting equipment for recycling lithium phosphate battery positive plates, and relates to the technical field of battery recycling, the roasting equipment comprises a furnace body shell, a bearing plate, an airflow sensor, a temperature sensor and a hot airflow dynamic distribution assembly, the bearing plate is installed on the side face of the inner wall of the furnace body shell, and an airflow channel is installed at the bottom of the inner wall of the bearing plate; a hot airflow dynamic distribution assembly is installed in the airflow channel, a temperature sensor is installed on the side face of the inner wall of the furnace body shell and connected with a central control system through a local area network, an airflow sensor is fixedly installed at the top of the inner wall of the airflow channel, and spiral detection blades are fixedly installed on the side face of the outer wall of the airflow sensor. According to the invention, the hot air flow dynamic distribution assembly is installed, so that the guide adjustment function of roasting air flow is realized, the problems of non-uniform roasting heat distribution and unstable heating are solved, the temperature zone control precision and stability are improved, and the roasting effect of the positive plate is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of battery recycling, and in particular to a baking device for recycling positive electrode sheets of lithium phosphate batteries. Background Art

[0002] With the large-scale application of lithium batteries and the increase in the amount of waste, the recycling of precious metals in waste batteries has become an important environmental and economic issue. The positive electrode of lithium phosphate batteries contains valuable elements such as lithium and phosphorus, but due to the strong stability of the material, these elements can only be effectively separated and recycled through means such as roasting. However, existing roasting equipment often has problems such as uneven temperature control, low efficiency, and substandard gas emissions. An improved equipment is urgently needed to improve the roasting effect and environmental performance.

[0003] Patent document CN110422832B discloses a device for crushing and grinding waste roasting saggers for positive electrode materials of lithium iron phosphate batteries. The above patent ensures that the degree of environmental pollution is reduced. The nitrogen tank of the soaking transmission platform is filled with fine particles after calcining at a high temperature of one thousand degrees through a heat release pressurizer to precipitate chemical components, thereby shortening the degradation time and improving the environmental protection of the sagger. However, the above patent cannot realize the function of guiding and regulating the roasting airflow.

[0004] Patent document CN108398015B discloses a continuous rapid roasting device for powder or granular materials. The above patent realizes that after multiple cycles, the material is roasted more completely in the furnace body with better effect, and it is also continuous roasting, which improves work efficiency. However, the above patent cannot realize the neutralization reaction function of the roasting gas and the cooling function of the roasting product.

[0005] Patent document CN104611566B discloses a method for recovering valuable metals from waste lithium-ion batteries. The above patent has the following significant advantages: simple equipment, low investment and operating costs, easy promotion, significantly reduced process energy consumption, and high recovery rate of valuable metals. However, the above patent cannot achieve the function of separating and recycling waste gas.

[0006] Patent document CN115548428B discloses a method for preparing a solid electrolyte that removes surface lithium carbonate by reduced pressure roasting, a battery solid electrolyte, and a solid-state battery. The above patent achieves rapid removal of lithium carbonate on the surface of LLZO solid electrolyte, ensures the uniformity of distribution of various elements in the oxide, and ensures stable electrochemical properties of the solid electrolyte. However, the above patent cannot achieve the purification function of harmful substances in exhaust gas and the gas ionization utilization function.

[0007] In summary, the above patents cannot achieve the functions of guiding and regulating the roasting gas flow, neutralizing the roasting gas, cooling the roasting product, separating and recycling the waste gas, purifying the harmful substances in the waste gas, and utilizing the gas ionization, which leads to the problems of unstable roasting temperature, poor roasting effect, substandard emissions, and low roasting efficiency. To this end, the present application proposes a roasting device for recycling positive electrodes of lithium phosphate batteries that can realize the functions of guiding and regulating the roasting airflow, neutralizing the roasting gas, cooling the roasting products, separating and recycling the waste gas, purifying harmful substances in the waste gas, and utilizing the gas ionization. Summary of the invention

[0008] The object of the present invention is to provide a roasting equipment for recycling positive electrode sheets of lithium phosphate batteries, so as to solve the technical problems proposed in the above-mentioned background technology that the function of guiding and regulating the roasting airflow, the function of neutralizing the roasting gas, the function of cooling the roasting product, the function of separating and recycling the waste gas, the function of purifying harmful substances in the waste gas and the function of gas ionization utilization cannot be realized, resulting in unstable roasting temperature, poor roasting effect, non-compliance with emissions standards and low roasting efficiency.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a roasting device for recycling positive electrode sheets of lithium phosphate batteries, comprising a furnace shell, a bearing plate, an airflow sensor, a temperature sensor and a hot airflow dynamic distribution component, wherein a bearing plate is installed on the side of the inner wall of the furnace shell, an airflow channel is installed at the bottom of the inner wall of the bearing plate, a hot airflow dynamic distribution component is installed in the airflow channel, a temperature sensor is installed on the side of the inner wall of the furnace shell, the temperature sensor is connected to a central control system via a local area network, an airflow sensor is fixedly installed on the top of the inner wall of the airflow channel, a spiral detection blade is fixedly installed on the side of the outer wall of the airflow sensor, and the airflow sensor is connected to the central control system via a local area network; The hot air flow dynamic distribution component is used to adjust the air flow guide according to the air flow parameters in the air flow channel, and the hot air flow dynamic distribution component includes: a first motor, a guide plate and a hot fan; A first motor is fixedly installed on the back side of the inner wall of the airflow channel, and the first motor is connected to the central control system through a signal line. A first rotating shaft is fixedly installed on the front output end of the outer wall of the first motor, and an active roller is fixedly installed on the outer wall of the first rotating shaft. A movable shaft is fixedly installed on the back side of the inner wall of the airflow channel, and a driven roller is fixedly installed on the outer wall of the movable shaft. Guide plates and rotating gears are fixedly installed on the outer walls of the active roller and the driven roller, and a synchronous chain is set between the rotating gears. A second motor is fixedly installed on the bottom of the inner wall of the airflow channel, and a second rotating shaft is fixedly installed on the top output end of the outer wall of the second motor. A hot fan is fixedly installed on the outer wall of the second rotating shaft. A first air inlet is opened on the side of the inner wall of the airflow channel, and an electric heater is fixedly installed on the side of the inner wall of the first air inlet, and the electric heater quickly heats the air in the first air inlet by the principle of eddy current heating.

[0010] Preferably, a wind window is installed on the side of the outer wall of the furnace body shell, a dust cover is fixedly installed on the side of the outer wall of the wind window, a second air inlet tube is installed on the side of the inner wall of the wind window, and the second air inlet tube is fixedly connected to the first air inlet tube by threads, and limit stops are installed on the top and bottom of the inner wall of the second air inlet tube, a first support rod is fixedly installed on the side of the inner wall of the second air inlet tube, a stop valve plate is movably mounted on the side of the outer wall of the first support rod, and a return spring is surrounded by the outer wall of the first support rod.

[0011] Preferably, a wire mesh is installed on the top of the outer wall of the supporting plate, a gas composition analyzer is fixedly installed on the bottom of the inner wall of the supporting plate, the gas composition analyzer is connected to the central control system through a local area network, a gas detector is fixedly installed on the bottom of the outer wall of the gas composition analyzer via a data cable, an airflow cooling and neutralization component is fixedly installed in the supporting plate, and the airflow cooling and neutralization component is connected to the central control system through a signal line.

[0012] Preferably, the airflow cooling and neutralization component is used to cool the airflow blown into the baking cavity between the carrier plates by the hot airflow dynamic distribution component and neutralize the atmosphere, and cool the positive electrode sheet of the lithium phosphate battery placed on the steel wire mesh. The airflow cooling and neutralization component includes: a flow pump, a pressure push rod and a spray head; A water tank is fixedly installed at the bottom of the inner wall of the bearing plate, a flow pump is fixedly installed at the top of the inner wall of the water tank, a pressure push rod is fixedly installed at the bottom of the outer wall of the flow pump, a water pipe is fixedly installed at the bottom of the outer wall of the water tank, and a sprinkler head is fixedly installed at the bottom of the outer wall of the water pipe.

[0013] Preferably, a waste gas recovery box is fixedly installed on the top of the outer wall of the furnace shell, and a dynamic waste gas separation and utilization module is installed in the waste gas recovery box, and the dynamic waste gas separation and utilization module is used to recover, separate and reuse the hot gas in the roasting cavity between the supporting plates; The dynamic exhaust gas separation and utilization module includes: a third motor, a cyclone dust collector and a recycling tank; An impurity filter is installed on the top of the inner wall of the furnace body shell, a third motor is fixedly installed on the top of the inner wall of the exhaust gas recovery box, a cyclone dust collector is fixedly installed on the output end of the bottom outer wall of the third motor, a recovery pipe is fixedly installed on the back of the outer wall of the exhaust gas recovery box, a recycling tank is fixedly installed on the bottom of the outer wall of the recovery pipe, and an air pipe is fixedly installed on the front of the outer wall of the recycling tank.

[0014] Preferably, an ionization purification rod is fixedly installed on the bottom of the inner wall of the recycling tank, and an activated carbon catalytic plate is fixedly installed on the side of the inner wall of the recycling tank. The ionization purification rod is connected to an external power supply through an electric wire, and the hot air is ionized and decomposed by ionization decomposition technology.

[0015] Preferably, two storage boxes are fixedly installed on the top of the outer wall of the furnace body shell, one of which is filled with acid-base neutralization liquid, and the other is filled with coolant, a connecting pipe is fixedly installed on the bottom of the outer wall of the storage box, and a plurality of water outlet holes are fixedly opened on the front side of the outer wall of the connecting pipe, and the water tank fixedly installed on the bottom of the inner wall of the supporting plate is connected to the water outlet hole through a hose plug.

[0016] Preferably, a partitioned air pipe is fixedly installed on the top of the inner wall of the furnace shell, a plurality of air holes are opened on the back of the outer wall of the partitioned air pipe, and the air holes are connected to the air pipe fixedly installed on the front of the outer wall of the recycling tank by plugging.

[0017] Preferably, a D camera is fixedly installed on the back of the inner wall of the furnace shell, and the D camera is connected to the central control system via a data cable. An infrared analysis detector is fixedly installed on the back of the inner wall of the furnace shell, and the infrared analysis detector is connected to the central control system via a data cable.

[0018] Preferably, the pressure push rod is connected to the pressure cylinder in the flow pump, and when not in operation, the pressure push rod is recovered by the piston cylinder installed at the bottom of the inner wall of the flow pump to the bottom outlet of the outer wall of the flow pump to seal the flow pump.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes the guiding and regulating function of the roasting airflow by installing a hot airflow dynamic distribution component, solves the problem of uneven roasting heat distribution and unstable heating, improves the temperature zone control accuracy and stability, and ensures the roasting effect of the positive electrode sheet; 2. The present invention realizes the neutralization reaction function of the roasting gas and the cooling function of the roasting product by installing an airflow cooling neutralization component, thereby improving the roasting efficiency, solving the problem of gas emission causing damage to the atmospheric environment, and improving economic and environmental benefits; 3. The present invention realizes the separation and recycling function of waste gas by installing a dynamic waste gas separation and utilization module, improves the roasting efficiency, improves the emission standard, and ensures that the waste gas emission meets the standard; 4. The present invention realizes the purification function of harmful substances in the exhaust gas and the gas ionization utilization function by installing an activated carbon catalytic plate and an ionization purification rod, thereby improving the roasting effect and the environmental friendliness of the industrial equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the front structure of the present invention; Figure 3 It is a partial structural schematic diagram of the hot air flow dynamic distribution component of the present invention; Figure 4 It is a partial structural schematic diagram of the airflow cooling and neutralization component of the present invention; Figure 5 This is a partial structural schematic diagram of the dynamic waste gas separation and utilization module of the present invention; Figure 6 It is a schematic diagram of the structure of the wind window part of the present invention; Figure 7 It is a partial structural schematic diagram of the recycling tank of the present invention; Figure 8 It is a partial structural schematic diagram of the 3D camera and infrared analysis detector of the present invention.

[0021] In the figure: 1. furnace shell; 2. exhaust gas recovery box; 3. recovery pipe; 4. storage box; 5. wind window; 6. bearing plate; 7. air flow channel; 8. temperature sensor; 9. air pipe; 10. air hole; 11. connecting pipe; 12. water outlet; 13. first air inlet; 14. electric heater; 15. second motor; 16. second rotating shaft; 17. hot fan; 18. first motor; 19. first rotating shaft; 20. driving roller; 21. rotating gear; 22. movable shaft; 23. driven roller; 24. guide plate; 25. air flow sensor; 26. spiral Detection blade; 27. Wire mesh; 28. Water tank; 29. ​​Flow pump; 30. Pressure push rod; 31. Water pipe; 32. Sprinkler head; 33. Gas detector; 34. Gas composition analyzer; 35. Third motor; 36. Cyclone dust collector; 37. Impurity filter; 38. Recycling tank; 39. Dust cover; 40. Second air inlet tube; 41. Limit stop block; 42. First support rod; 43. Stop valve plate; 44. Return spring; 45. Activated carbon catalytic plate; 46. Ionization purification rod; 47. 3D camera; 48. Infrared analysis detector. DETAILED DESCRIPTION

[0022] 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.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 1 , Figure 2 , Figure 3 and Figure 6 , an embodiment provided by the present invention: a roasting device for recycling positive electrode sheets of lithium phosphate batteries, comprising a furnace shell 1, a carrying plate 6, an airflow sensor 25, a temperature sensor 8 and a hot airflow dynamic distribution component, characterized in that: a carrying plate 6 is installed on the side of the inner wall of the furnace shell 1, an airflow channel 7 is installed at the bottom of the inner wall of the carrying plate 6, a hot airflow dynamic distribution component is installed in the airflow channel 7, a temperature sensor 8 is installed on the side of the inner wall of the furnace shell 1, the temperature sensor 8 is connected to the central control system through a local area network, an airflow sensor 25 is fixedly installed on the top of the inner wall of the airflow channel 7, a spiral detection blade 26 is fixedly installed on the side of the outer wall of the airflow sensor 25, and the airflow sensor 25 is connected to the central control system through a local area network; The hot air flow dynamic distribution component is used to adjust the air flow guide according to the air flow parameters in the air flow channel 7, and the hot air flow dynamic distribution component includes: a first motor 18, a guide plate 24 and a hot fan 17; A first motor 18 is fixedly installed on the back of the inner wall of the airflow channel 7, and the first motor 18 is connected to the central control system through a signal line. A first rotating shaft 19 is fixedly installed on the front output end of the outer wall of the first motor 18, and an active roller 20 is fixedly installed on the outer wall of the first rotating shaft 19. A movable shaft 22 is fixedly installed on the back of the inner wall of the airflow channel 7, and a driven roller 23 is fixedly installed on the outer wall of the movable shaft 22. Guide plates 24 and rotating gears 21 are fixedly installed on the outer walls of the active roller 20 and the driven roller 23, and a synchronous chain is set between the rotating gears 21. A second motor 15 is fixedly installed on the bottom of the inner wall of the airflow channel 7, and a second rotating shaft 16 is fixedly installed on the output end of the top of the outer wall of the second motor 15. A hot fan 17 is fixedly installed on the outer wall of the second rotating shaft 16. A first air inlet cylinder 13 is opened on the side of the inner wall of the airflow channel 7, and an electric heater 14 is fixedly installed on the side of the inner wall of the first air inlet cylinder 13. The electric heater 14 quickly heats the air in the first air inlet cylinder 13 through the principle of eddy current heating; A wind window 5 is installed on the outer wall side of the furnace shell 1, a dust cover 39 is fixedly installed on the outer wall side of the wind window 5, a second air inlet cylinder 40 is installed on the inner wall side of the wind window 5, and the second air inlet cylinder 40 is fixedly connected to the first air inlet cylinder 13 by threads, and a limited stop block 41 is installed on the top and bottom of the inner wall of the second air inlet cylinder 40, a first support rod 42 is fixedly installed on the inner wall side of the second air inlet cylinder 40, a stop valve plate 43 is movably sleeved on the outer wall side of the first support rod 42, and a return spring 44 is surrounded by the outer wall of the first support rod 42; Furthermore, when the positive electrode sheet of the lithium phosphate battery is baked, the second motor 15 is started, the second motor 15 drives the second rotating shaft 16 to rotate, the second rotating shaft 16 drives the hot fan 17 to rotate, the hot fan 17 rotates at a high speed to form a negative pressure in the air flow channel 7, the negative pressure sucks the stop valve plate 43 to press the return spring 44 to be compressed from the normal state, the stop valve plate 43 moves to the right on the first support rod 42, the stop valve plate 43 is separated from the limit stop block 41, and the external air is sucked into the first air inlet 13 from the wind window 5 through the second air inlet 40, the electric heater 14 electrically heats the inhaled air, and the heated air is blown into the baking chamber between the supporting plates 6 through the hot fan 17, the airflow blows the spiral detection blade 26 and the airflow sensor 25, the spiral detection blade 26 and the airflow sensor 25 transmit the airflow velocity and The airflow direction data is transmitted to the central control system for CNN analysis by the machine learning algorithm. The central control system generates a corresponding airflow guide control adjustment signal to the first motor 18 in combination with the temperature distribution in the roasting chamber collected by the temperature sensor 8. The first motor 18 starts to drive the first rotating shaft 19 to rotate, and the first rotating shaft 19 drives the active roller 20 to rotate. The active roller 20 drives the rotating gear 21 to rotate. The rotating gear 21 is driven by a chain, and the rotating gear 21 drives the driven roller 23 to rotate on the movable shaft 22. The active roller 20 and the driven roller 23 drive the guide plate 24 to rotate the opening and closing angle, so as to change the blowing angle of the airflow, ensure uniform temperature distribution in the roasting chamber, and ensure that the airflow is effectively guided and circulated between the temperature zones, optimize the airflow path, prevent heat accumulation or loss, improve the energy efficiency of the equipment, and improve the roasting effect.

[0026] See also Figure 1 , Figure 2 and Figure 4 , an embodiment provided by the present invention: a roasting device for recycling positive electrode sheets of lithium phosphate batteries, wherein a steel mesh 27 is installed on the top of the outer wall of the carrier plate 6, a gas component analyzer 34 is fixedly installed on the bottom of the inner wall of the carrier plate 6, the gas component analyzer 34 is connected to the central control system through a local area network, a gas detector 33 is fixedly installed on the bottom of the outer wall of the gas component analyzer 34 through a data line connection, an airflow cooling and neutralization component is fixedly installed in the carrier plate 6, and the airflow cooling and neutralization component is connected to the central control system through a signal line; The airflow cooling and neutralization component is used to cool the airflow blown into the baking chamber between the carrier plates 6 by the hot airflow dynamic distribution component and neutralize the atmosphere, and cool the positive electrode sheet of the lithium phosphate battery placed on the steel mesh 27. The airflow cooling and neutralization component includes: a flow pump 29, a pressure push rod 30 and a spray head 32; A water tank 28 is fixedly installed at the bottom of the inner wall of the bearing plate 6, a flow pump 29 is fixedly installed at the top of the inner wall of the water tank 28, a pressure push rod 30 is fixedly installed at the bottom of the outer wall of the flow pump 29, a water pipe 31 is fixedly installed at the bottom of the outer wall of the water tank 28, and a sprinkler head 32 is fixedly installed at the bottom of the outer wall of the water pipe 31; Two storage boxes 4 are fixedly installed on the top of the outer wall of the furnace shell 1, one of which is filled with acid-base neutralization liquid, and the other is filled with cooling liquid. A connecting pipe 11 is fixedly installed on the bottom of the outer wall of the storage box 4, and a plurality of water outlet holes 12 are fixedly opened on the front of the outer wall of the connecting pipe 11, and a water tank 28 fixedly installed on the bottom of the inner wall of the bearing plate 6 is connected to the water outlet hole 12 through a hose plug; Furthermore, the wire mesh 27 is used to carry the high-temperature positive electrode sheet and ensure smooth air circulation and uniform heating effect. The gas detector 33 collects the airflow component data in the roasting chamber in real time, and transmits the data to the gas composition analyzer 34 to analyze the harmful gas concentration and gas composition data in the gas using a preset program, and transmits it to the central control system for intelligent emission adjustment. The central control system analyzes the emission data and generates a corresponding adjustment signal to the flow pump 29. The flow pump 29 pumps the neutralizing liquid in the water tank 28 into the water pipe 31, and the pressure push rod 30 is pushed downward by the piston cylinder and pressed into the water pipe 31 to pressurize the neutralizing liquid. The neutralizing liquid is sprayed into the gas in the roasting chamber through the spray head 32 for acid-base neutralization, preventing harmful gases from being discharged into the atmosphere and causing damage to the atmospheric environment; when the roasting is completed and the exhaust is completed, the flow pump sprays the coolant in the water tank 28 through the spray head 32 onto the surface of the roasted positive electrode sheet, ensuring that the positive electrode sheet is quickly cooled, which is convenient for the operator to remove and improves the roasting rhythm.

[0027] See also Figure 5 and Figure 7 , an embodiment provided by the present invention: a roasting device for recycling positive electrode sheets of lithium phosphate batteries, wherein a waste gas recovery box 2 is fixedly installed on the top of the outer wall of the furnace shell 1, and a dynamic waste gas separation and utilization module is installed in the waste gas recovery box 2, and the dynamic waste gas separation and utilization module is used to recover, separate and reuse the hot gas in the roasting chamber between the carrier plates 6; The dynamic exhaust gas separation and utilization module includes: a third motor 35, a cyclone dust collector 36 and a recycling tank 38; An impurity filter 37 is installed on the top of the inner wall of the furnace shell 1, a third motor 35 is fixedly installed on the top of the inner wall of the exhaust gas recovery box 2, a cyclone dust collector 36 is fixedly installed on the output end of the bottom of the outer wall of the third motor 35, a recovery pipe 3 is fixedly installed on the back of the outer wall of the exhaust gas recovery box 2, a recycling tank 38 is fixedly installed on the bottom of the outer wall of the recovery pipe 3, and an air pipe 9 is fixedly installed on the front of the outer wall of the recycling tank 38; An ionization purification rod 46 is fixedly installed at the bottom of the inner wall of the recycling tank 38, and an activated carbon catalytic plate 45 is fixedly installed on the side of the inner wall of the recycling tank 38. The ionization purification rod 46 is connected to an external power supply through an electric wire, and the hot air is ionized and decomposed by an ionization decomposition technology; A partitioned air pipe 9 is fixedly installed on the top of the inner wall of the furnace shell 1, and a plurality of air holes 10 are opened on the back of the outer wall of the partitioned air pipe 9, and the air holes 10 are connected to the air pipe 9 fixedly installed on the front of the outer wall of the recycling tank 38 by plugging; Furthermore, when it is necessary to discharge the air in the furnace shell 1, the third motor 35 in the exhaust gas recovery box 2 is started, and the third motor 35 drives the cyclone dust collector 36 to rotate at a high speed to absorb the particulate dust therein and drop it into the impurity filter 37, and the roasting gas in the furnace shell 1 is sucked into the recycling tank 38 through the recovery pipe 3, and the activated carbon catalytic plate 45 in the recycling tank 38 adsorbs and non-toxic catalytic reactions on the harmful substances in the roasting gas to ensure that the gas does not contain harmful substances, and the ionization purification rod 46 is energized to ionize and decompose the treated gas into nitrogen, and re-filled into the roasting chamber through the air pipe 9 and the air hole 10 for roasting preheating, and the treated residual gas is then discharged through the exhaust system connected to the recycling tank 38; ensuring that the roasting gas emission standard meets environmental protection requirements, and at the same time, the roasting hot gas is recycled and reused to improve economic benefits and roasting efficiency.

[0028] See also Figure 1 and Figure 8 , an embodiment of the present invention: a roasting device for recycling positive electrode sheets of lithium phosphate batteries, wherein a 3D camera 47 is fixedly installed on the back of the inner wall of the furnace shell 1, and the 3D camera 47 is connected to the central control system through a data line, and an infrared analysis detector 48 is fixedly installed on the back of the inner wall of the furnace shell 1, and the infrared analysis detector 48 is connected to the central control system through a data line; Furthermore, the 3D camera 47 takes real-time image data of the positive electrode sheet placed on the carrier plate 6 and transmits it to the central control system for thickness analysis, and the central control system controls and adjusts the heating temperature; the infrared analysis detector 48 collects and analyzes the roasting effect in real time through infrared analysis technology and transmits it to the central control system. When the roasting is completed, the central control system stops the roasting heating process.

[0029] See also Figure 2 and Figure 4 , an embodiment of the present invention provides: a baking device for recycling positive electrode sheets of lithium phosphate batteries, wherein the pressure push rod 30 is connected to the pressure cylinder in the flow pump 29, and the pressure push rod 30 is recovered by the piston cylinder installed at the bottom of the inner wall of the flow pump 29 to the bottom outlet of the outer wall of the flow pump 29 to seal the flow pump 29 when not working; Furthermore, when not in operation, the pressure push rod 30 is recovered by the piston cylinder installed at the bottom of the inner wall of the flow pump 29 to the bottom outlet of the outer wall of the flow pump 29 to seal the flow pump 29, thereby preventing water leakage from affecting the baking effect of the positive electrode sheet when the flow pump 29 fails.

[0030] Working principle: First, use the 3D camera 47 to take real-time image data of the positive electrode sheet placed on the carrier plate 6 and transmit it to the central control system for thickness analysis. The central control system controls and adjusts the heating temperature; Next, the hot air flow dynamic distribution component adjusts the roasting air flow according to the roasting parameter requirements to ensure uniform roasting temperature; Finally, after the roasting is completed, the dynamic waste gas separation and utilization module will recycle the roasting waste gas for emission treatment and energy reuse, thereby improving the roasting efficiency and effect, ensuring that the roasting gas emissions meet environmental protection standards and improving environmental friendliness.

[0031] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A roasting device for recycling positive electrode sheets of lithium phosphate batteries, comprising a furnace shell (1), a carrier plate (6), an air flow sensor (25), a temperature sensor (8) and a hot air flow dynamic distribution component, characterized in that: A bearing plate (6) is installed on the inner wall side of the furnace shell (1), an airflow channel (7) is installed on the bottom of the inner wall of the bearing plate (6), a hot airflow dynamic distribution component is installed in the airflow channel (7), a temperature sensor (8) is installed on the inner wall side of the furnace shell (1), the temperature sensor (8) is connected to the central control system via a local area network, an airflow sensor (25) is fixedly installed on the top of the inner wall of the airflow channel (7), a spiral detection blade (26) is fixedly installed on the outer wall side of the airflow sensor (25), and the airflow sensor (25) is connected to the central control system via a local area network; The hot air flow dynamic distribution component is used to adjust the air flow guide according to the air flow parameters in the air flow channel (7), and the hot air flow dynamic distribution component comprises: a first motor (18), a guide plate (24) and a hot fan (17); A first motor (18) is fixedly mounted on the back of the inner wall of the airflow channel (7), the first motor (18) is connected to a central control system via a signal line, a first rotating shaft (19) is fixedly mounted on the front output end of the outer wall of the first motor (18), an active roller (20) is fixedly mounted on the outer wall of the first rotating shaft (19), a movable shaft (22) is fixedly mounted on the back of the inner wall of the airflow channel (7), a driven roller (23) is fixedly mounted on the outer wall of the movable shaft (22), and guide plates (24) are fixedly mounted on the outer walls of both the active roller (20) and the driven roller (23), and the active roller (20) A synchronous crawler (21) is looped around the outer wall of the driven roller (23); a second motor (15) is fixedly mounted on the bottom of the inner wall of the airflow channel (7); a second rotating shaft (16) is fixedly mounted on the output end of the outer wall top of the second motor (15); a hot fan (17) is fixedly mounted on the outer wall of the second rotating shaft (16); a first air inlet cylinder (13) is opened on the side of the inner wall of the airflow channel (7); an electric heater (14) is fixedly mounted on the side of the inner wall of the first air inlet cylinder (13); the electric heater (14) quickly heats the air in the first air inlet cylinder (13) through the principle of eddy current heating.

2. The calcining equipment for recycling positive electrode sheets of lithium phosphate batteries according to claim 1, characterized in that: A wind window (5) is installed on the side of the outer wall of the furnace shell (1), a dust cover (39) is fixedly installed on the side of the outer wall of the wind window (5), a second air inlet tube (40) is installed on the side of the inner wall of the wind window (5), and the second air inlet tube (40) is fixedly connected to the first air inlet tube (13) by means of threads, and limit stop blocks (41) are installed on the top and bottom of the inner wall of the second air inlet tube (40), a first support rod (42) is fixedly installed on the side of the inner wall of the second air inlet tube (40), a stop valve plate (43) is movably mounted on the side of the outer wall of the first support rod (42), and a return spring (44) is surrounded by the outer wall of the first support rod (42).

3. The calcining equipment for recycling positive electrode sheets of lithium phosphate batteries according to claim 1, characterized in that: A steel mesh (27) is installed on the top of the outer wall of the carrier plate (6), a gas composition analyzer (34) is fixedly installed on the bottom of the inner wall of the carrier plate (6), the gas composition analyzer (34) is connected to the central control system via a local area network, a gas detector (33) is fixedly installed on the bottom of the outer wall of the gas composition analyzer (34) via a data line, an airflow cooling and neutralization component is fixedly installed inside the carrier plate (6), and the airflow cooling and neutralization component is connected to the central control system via a signal line.

4. The calcining equipment for recycling positive electrode sheets of lithium phosphate batteries according to claim 3, characterized in that: The airflow cooling and neutralization component is used to cool the airflow blown into the baking chamber between the carrier plates (6) by the hot airflow dynamic distribution component and neutralize the atmosphere, thereby cooling the positive electrode sheet of the lithium phosphate battery placed on the steel wire mesh (27). The airflow cooling and neutralization component includes: a flow pump (29), a pressure push rod (30) and a spray head (32); A water tank (28) is fixedly mounted on the bottom of the inner wall of the bearing plate (6), a flow pump (29) is fixedly mounted on the top of the inner wall of the water tank (28), a pressure push rod (30) is fixedly mounted on the bottom of the outer wall of the flow pump (29), a water pipe (31) is fixedly mounted on the bottom of the outer wall of the water tank (28), and a spray head (32) is fixedly mounted on the bottom of the outer wall of the water pipe (31).

5. The calcining equipment for recycling positive electrode sheets of lithium phosphate batteries according to claim 1, characterized in that: A waste gas recovery box (2) is fixedly mounted on the top of the outer wall of the furnace shell (1), and a dynamic waste gas separation and utilization module is mounted in the waste gas recovery box (2), the dynamic waste gas separation and utilization module being used to recover, separate and reuse the hot gas in the roasting cavity between the supporting plates (6); The dynamic exhaust gas separation and utilization module comprises: a third motor (35), a cyclone dust collector (36) and a recycling tank (38); An impurity filter (37) is installed at the top of the inner wall of the furnace shell (1), a third motor (35) is fixedly installed at the top of the inner wall of the exhaust gas recovery box (2), a cyclone dust collector (36) is fixedly installed at the output end of the bottom of the outer wall of the third motor (35), a recovery pipe (3) is fixedly installed at the back of the outer wall of the exhaust gas recovery box (2), a recovery tank (38) is fixedly installed at the bottom of the outer wall of the recovery pipe (3), and an air pipe (9) is fixedly installed at the front of the outer wall of the recovery tank (38).

6. A calcining device for recycling positive electrode sheets of lithium phosphate batteries according to claim 5, characterized in that: An ionization purification rod (46) is fixedly mounted on the bottom of the inner wall of the recycling tank (38), and an activated carbon catalytic plate (45) is fixedly mounted on the side of the inner wall of the recycling tank (38). The ionization purification rod (46) is connected to an external power supply via an electric wire, and ionization decomposition technology is used to ionize and decompose the hot air.

7. The calcining equipment for recycling positive electrode sheets of lithium phosphate batteries according to claim 1, characterized in that: Two storage boxes (4) are fixedly mounted on the top of the outer wall of the furnace shell (1), one of which is filled with an acid-base neutralizing liquid, and the other is filled with a cooling liquid. A connecting pipe (11) is fixedly mounted on the bottom of the outer wall of the storage box (4), and a plurality of water outlet holes (12) are fixedly opened on the front of the outer wall of the connecting pipe (11). A water tank (28) fixedly mounted on the bottom of the inner wall of the supporting plate (6) is connected to the water outlet holes (12) via a hose.

8. The calcining equipment for recycling positive electrode sheets of lithium phosphate batteries according to claim 6, characterized in that: A partitioned air pipe (9) is fixedly mounted on the top of the inner wall of the furnace shell (1), a plurality of air holes (10) are opened on the back of the outer wall of the partitioned air pipe (9), and the air holes (10) are plugged and connected to the air pipe (9) fixedly mounted on the front of the outer wall of the recycling tank (38).

9. The calcining equipment for recycling positive electrode sheets of lithium phosphate batteries according to claim 1, characterized in that: A 3D camera (47) is fixedly mounted on the back of the inner wall of the furnace shell (1), and the 3D camera (47) is connected to the central control system via a data cable. An infrared analysis detector (48) is fixedly mounted on the back of the inner wall of the furnace shell (1), and the infrared analysis detector (48) is connected to the central control system via a data cable.

10. The calcining equipment for recycling positive electrode sheets of lithium phosphate batteries according to claim 4, characterized in that: The pressure push rod (30) is connected to the pressure cylinder in the flow pump (29), and when not in operation, the pressure push rod (30) is recovered by a piston cylinder installed at the bottom of the inner wall of the flow pump (29) to the bottom outlet of the outer wall of the flow pump (29) to seal the flow pump (29).

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