Automatic empty burning control system for treating tar in kiln

Abstract

The utility model discloses an automatic empty burning control system for treating tar in a kiln, which comprises a group of control units arranged at one end above a bottom plate, and an inert gas control assembly comprising a concentric-square-shaped inert gas pipe, a manual ball valve, a first electromagnetic pneumatic ball valve and a second electromagnetic pneumatic ball valve, the top of the control unit at the other end is provided with a concentric-square-shaped inert gas pipe, the concentric-square-shaped inert gas pipe is connected to a second gas outlet pipe, and the middle of the concentric-square-shaped inert gas pipe and the middle of the second gas outlet pipe are provided with a first electromagnetic pneumatic ball valve and a second electromagnetic pneumatic ball valve correspondingly. Manual ball valves are arranged on the two sides of the first electromagnetic pneumatic ball valve and the two sides of the second electromagnetic pneumatic ball valve. The automatic empty burning control system for treating tar in the kiln is of a structure for controlling nitrogen inert gas.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery anode material technology, and in particular to an automatic dry-firing control system for tar treatment in lithium battery kilns. Background Technology

[0002] In the furnace for firing lithium battery anode materials, a large amount of tar is generated during the firing process. Approximately once a month, a dry firing is required (the exact amount depends on the amount of tar accumulated in the furnace) to burn off the accumulated tar. During this process, no products are produced in the furnace; it is solely for handling the accumulated tar. Previously, dry firing was manually controlled, relying on human observation to determine when to open the door and adjust the nitrogen flow. When the tar content is high, the exhaust temperature may become uncontrollable, requiring operators to be on duty 24 hours a day. To reduce the labor intensity of workers, this application proposes an improved solution. For automatic control, the key is to ensure safety, which is related to the control of nitrogen. At the beginning, there is a lot of tar in the furnace, so nitrogen needs to be injected. No air can be allowed in, otherwise the tar combustion will be out of control and the temperature will rise rapidly. So, at the beginning, nitrogen should be injected and no air should be allowed in. After burning to a certain extent, some of the tar will evaporate through heating. After the temperature stabilizes, the amount of nitrogen is reduced and air is injected to allow the air to come into contact with the remaining tar for combustion, burning off the remaining tar. Therefore, an automatic dry-burning control system for tar treatment in a kiln with a nitrogen inert gas control structure is provided. Utility Model Content

[0003] This utility model proposes an automatic dry-firing control system for tar treatment in lithium battery kilns, which is mainly aimed at controlling nitrogen inert gas during dry firing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An automatic dry-firing control system for tar treatment in a kiln includes a set of control units disposed at one end above a base plate. The inert gas control assembly includes a loop-shaped inert gas pipe, a manual ball valve, a first electromagnetic pneumatic ball valve, and a second electromagnetic pneumatic ball valve. A loop-shaped inert gas pipe is disposed on the top of the control unit at the other end. The loop-shaped inert gas pipe is connected to a second outlet pipe. The first electromagnetic pneumatic ball valve and the second electromagnetic pneumatic ball valve are respectively disposed in the middle portions of the loop-shaped inert gas pipe and the second outlet pipe. Manual ball valves are disposed on both sides of the first and second electromagnetic pneumatic ball valves. Preferably, an outlet is disposed on the outer side of the second outlet pipe.

[0006] Another set of control units is set at the other end above the base plate, and a gas pipe is set on the top of the control unit. An elbow is set on the side of the gas pipe, and a bypass is set below the junction of the gas pipe and the elbow. A first manual ball valve is set in the middle of the bypass, and a filter pressure reducing component is set in the middle of the gas pipe. A first gas outlet pipe is set below the gas pipe in the middle of the control unit, and a bypass is connected to the rear end of the first gas outlet pipe. A flow monitoring and regulating component is set on the side of the bypass inside the first gas outlet pipe, and an inert gas control component is set on the top of the control unit at the other end.

[0007] Preferably, the elbow is provided with an air inlet at the top, and the gas pipeline inlet is provided with a second manual ball valve.

[0008] Preferably, the filter pressure reducing assembly includes a filter, a first digital display pressure gauge, a pressure reducing valve, and a second digital display pressure gauge. A filter is provided on the outside of the gas pipeline, located on the side of the second manual ball valve. A first digital display pressure gauge is provided on the side of the filter, and a pressure reducing valve is provided on the side of the first digital display pressure gauge. The gas pipeline is connected to a first gas outlet pipe, and a second digital display pressure gauge is provided on the outside of the first gas outlet pipe, located below the first digital display pressure gauge.

[0009] Preferably, the flow monitoring and adjustment component includes a thermal flow meter and a pressure relief ball valve, and a thermal flow meter is provided on the outside of the first outlet pipe, located on the side of the second digital display pressure gauge. A pressure relief ball valve is provided on the side of the thermal flow meter, and a third manual ball valve is provided on the side of the pressure relief ball valve.

[0010] It also includes a temperature detection component, which includes multiple thermocouples. The thermocouples are respectively installed in multiple temperature zones of the kiln, the exhaust duct, the processing furnace, and the exhaust fan, and are equipped with an over-temperature alarm connection.

[0011] Preferably, a flange is provided on the side of the first vent pipe, and the flange is connected to a second vent pipe by bolts.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The system's support frame is equipped with an inert gas control component at the top, which can combine electromagnetic pneumatic ball valves and electric manual ball valves. The electromagnetic pneumatic ball valves can be used for automatic control. The inert gas control structure is equipped with electromagnetic pneumatic ball valves that open automatically in the event of a power outage, ensuring that inert gas can still be continuously supplied to the kiln during power interruption, preventing the kiln from overheating and becoming unusable.

[0014] Secondly, the use of a loop-shaped inert gas pipe enables the control system to form a parallel loop design, so even if a valve fails, it will not affect the normal operation of the entire system, ensuring the safety and continuity of production. The use of a loop-shaped inert gas pipe and a manual ball valve ensures that the system can still work normally when a single branch fails, further improving the inert gas control.

[0015] In addition, the system structure can measure the temperature of the kiln temperature zone, exhaust duct, processing furnace, and exhaust fan by thermocouples. Once the temperature exceeds the set danger level, nitrogen is automatically injected to reduce the oxygen content in the furnace and lower the tar combustion temperature, thus providing automatic protection for the kiln and other equipment.

[0016] The overall system structure realizes an effective automatic dry-firing control system for tar treatment in lithium battery kilns. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is the front view of the present invention.

[0019] Figure 3 This is a side view of the present invention.

[0020] Figure 4 This is a schematic diagram of the working principle of the nitrogen control system for tar treatment in the kiln of this utility model.

[0021] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle.

[0022] Numbered in the diagram: 1. Base plate; 2. Control unit; 3. Gas pipeline; 4. Elbow; 5. Bypass; 6. First manual ball valve; 7. First outlet pipe; 8. Inlet; 9. Second manual ball valve; 10. Filter; 11. First digital pressure gauge; 12. Pressure reducing valve; 13. Second digital pressure gauge; 14. Thermal flow meter; 15. Pressure relief ball valve; 16. Third manual ball valve; 17. Flange; 18. Second outlet pipe; 19. Bolt; 20. U-shaped inert gas pipe; 21. Manual ball valve; 22. First electromagnetic pneumatic ball valve; 23. Second electromagnetic pneumatic ball valve; 24. Outlet. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figures 1-5This utility model provides a technical solution: an automatic dry-burning control system for tar treatment in a kiln, including a base plate 1, two sets of control units 2 are arranged on the top of the base plate 1, and a gas pipe 3 is arranged on the top of one control unit 2. An elbow 4 is arranged on the side of the gas pipe 3, and a bypass 5 is arranged below the junction of the gas pipe 3 and the elbow 4. A first manual ball valve 6 is arranged in the middle of the bypass 5, and a filter pressure reducing component is arranged in the middle of the gas pipe 3. A first gas outlet pipe 7 is arranged below the gas pipe 3 in the middle of the control unit 2, and the rear end of the first gas outlet pipe 7 is connected to the bypass 5. A flow monitoring and adjustment component is arranged on the side of the bypass 5 inside the first gas outlet pipe 7, and an inert gas control component is arranged on the top of the other control unit 2.

[0025] Reference Figure 1 , Figure 2 The filter and pressure reducing assembly includes a filter 10, a first digital pressure gauge 11, a pressure reducing valve 12, and a second digital pressure gauge 13. The filter 10 is located on the outside of the gas pipeline 3, next to the second manual ball valve 9. The first digital pressure gauge 11 is located on the side of the filter 10, and the pressure reducing valve 12 is located on the side of the first digital pressure gauge 11. The gas pipeline 3 is connected to the first gas outlet pipe 7, and the second digital pressure gauge 13 is located on the outside of the first gas outlet pipe 7, below the first digital pressure gauge 11, to facilitate observation of the inert gas nitrogen pressure value and ensure that the gas pipeline 3 and the first gas outlet pipe 7 are always kept within a safe pressure range.

[0026] Reference Figure 3 The flow monitoring and regulation component includes a thermal flow meter 14 and a pressure relief ball valve 15. The thermal flow meter 14 is located on the side of the second digital display pressure gauge 13 outside the first outlet pipe 7. The pressure relief ball valve 15 is located on the side of the thermal flow meter 14, and a third manual ball valve 16 is located on the side of the pressure relief ball valve 15, which helps to ensure its safety.

[0027] It also includes a temperature detection component comprising multiple thermocouples, which are respectively installed in each temperature zone of the kiln, the exhaust duct, the processing furnace, and the exhaust fan, and are equipped with an over-temperature alarm connection. It also includes a controller, which is connected to the filters, first digital pressure gauge, pressure reducing valve, second digital pressure gauge, thermal flow meter, pressure relief ball valve, first electromagnetic pneumatic ball valve, second electromagnetic pneumatic ball valve, and each thermocouple of the two control units, and is equipped with an alarm module. The control circuit connection is existing technology and will not be detailed here.

[0028] In specific implementation, an automatic dry-burning control system for tar treatment in a kiln can achieve the following: When the temperature inside the kiln, the exhaust pipe, or the treatment furnace is too high and needs adjustment, it first monitors in real time via thermocouples (thermocouples are installed in each temperature zone of the kiln, the exhaust pipe, and the treatment furnace). Referring to the preset temperature safety threshold, nitrogen is injected first, and the gas pressure is adjusted through a pressure reducing valve. The first and second digital pressure gauges ensure that the pressure values ​​of the gas pipeline and the first outlet pipe are within a safe range. Then, the asphyxiation effect of the inert gas nitrogen is used to suppress potential combustion reactions. When it burns to a certain extent, the tar will volatilize through heating. After the temperature stabilizes, the outlet replacement chamber gate is opened. If any thermocouple triggers an over-temperature alarm, the outlet gate is closed, and the system continues to burn under nitrogen for a period of time. The outlet replacement gate is then opened again. If another thermocouple triggers an over-temperature alarm, the above operation is repeated, closing the outlet gate and continuing to burn under nitrogen for a period of time. If no over-temperature alarm occurs, the replacement chamber gate is opened to allow air to contact and burn the remaining tar. The first electromagnetic pneumatic ball valve 22 and the second electromagnetic pneumatic ball valve 23 are closed, and nitrogen is shut off, continuing to burn under nitrogen for the set time, at which point the burning process ends. This operation significantly improves response speed and accuracy, effectively controls temperature to ensure safety, and significantly improves tar combustion efficiency.

[0029] Reference Figure 3 An air inlet 8 is provided at the top of the elbow 4, and a second manual ball valve 9 is provided at the inlet end of the gas pipeline 3. A flange 17 is provided on the side of the first air outlet pipe 7, and the flange 17 is connected to the second air outlet pipe 18 by bolts 19.

[0030] Reference Figure 4 , Figure 5 The inert gas control assembly includes a loop-shaped inert gas pipe 20, a manual ball valve 21, a first electromagnetic pneumatic ball valve 22, and a second electromagnetic pneumatic ball valve 23. The top of the control unit 2 at the other end is also equipped with a loop-shaped inert gas pipe 20, which is connected to a second outlet pipe 18. The loop-shaped inert gas pipe 20 and the second outlet pipe 18 are respectively equipped with a first electromagnetic pneumatic ball valve 22 and a second electromagnetic pneumatic ball valve 23 in the middle. Manual ball valves 21 are installed on both sides of the first electromagnetic pneumatic ball valve 22 and the second electromagnetic pneumatic ball valve 23. An outlet 24 is provided on the outer side of the second outlet pipe 18. The loop-shaped inert gas pipe 20 and the second outlet pipe 18 form a parallel circuit. The arrangement of the first electromagnetic pneumatic ball valve 22, the second electromagnetic pneumatic ball valve 23, and the manual ball valve 21 ensures normal operation even when a single branch fails, further improving the inert gas control.

[0031] In specific implementation, an automatic dry-firing control system for tar treatment in a kiln can achieve the following: When the inert gas control system encounters a power outage or emergency production stoppage, the inert gas control structure is equipped with a first electromagnetic pneumatic ball valve 22 and a second electromagnetic pneumatic ball valve 23 that automatically open when power is interrupted. This ensures that inert gas nitrogen can still be continuously supplied to the inside of the kiln during power outages, preventing the kiln from being scrapped due to excessively high temperatures and causing significant safety hazards. At the same time, the second outlet pipe 18 and the loop inert gas pipe 20 adopt a parallel circuit design. Even if one valve fails, it will not affect the normal operation of the entire system. The system can be adjusted by manually rotating the manual ball valve 21 to ensure normal operation. Through the above operations, the safety and continuity of the tar treatment process are ensured. In addition, if it is necessary to enter the inside of the kiln for maintenance, it must be manually confirmed that the manual ball valve 21 is in the closed state to ensure personnel safety.

[0032] The above implementation principle is also an automatic dry-burning control method for tar treatment based on the above system.

[0033] The above-mentioned control system and method have been tested in the kiln for firing lithium battery anode materials in this factory, and have fully realized an effective automatic dry-firing control system and method for tar treatment in lithium battery kilns.

[0034] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An automatic dry-firing control system for tar treatment in a kiln, characterized in that, The system includes a set of control units (2) at one end of the base plate (1). The top of the control unit (2) is provided with an inert gas control component. The inert gas control component includes a loop inert gas pipe (20), a manual ball valve (21), a first electromagnetic pneumatic ball valve (22), and a second electromagnetic pneumatic ball valve (23). The top of the control unit (2) at the other end is provided with a loop inert gas pipe (20). The loop inert gas pipe (20) is connected to a second outlet pipe (18). The loop inert gas pipe (20) and the second outlet pipe (18) are respectively provided with a first electromagnetic pneumatic ball valve (22) and a second electromagnetic pneumatic ball valve (23). Manual ball valves (21) are provided on both sides of the first electromagnetic pneumatic ball valve (22) and the second electromagnetic pneumatic ball valve (23).

2. The automatic dry-firing control system for tar treatment in a kiln according to claim 1, characterized in that, An air outlet (24) is provided on the outside of the second air outlet pipe (18).

3. The automatic dry-firing control system for tar treatment in a kiln according to claim 1, characterized in that, Another set of control units (2) is provided at the other end above the base plate (1), and a gas pipe (3) is provided on the top of the control unit (2). An elbow (4) is provided on the side of the gas pipe (3), and a bypass (5) is provided below the junction of the gas pipe (3) and the elbow (4). A first manual ball valve (6) is provided in the middle of the bypass (5), and a filter pressure reducing assembly is provided in the middle of the gas pipe (3). A first gas outlet pipe (7) is provided below the gas pipe (3) in the middle of the control unit (2), and a bypass (5) is connected to the rear end of the first gas outlet pipe (7). A flow monitoring and adjustment assembly is provided on the side of the bypass (5) inside the first gas outlet pipe (7).

4. The automatic dry-firing control system for tar treatment in a kiln according to claim 3, characterized in that, The elbow (4) is provided with an air inlet (8) at the top, and the gas pipeline (3) is provided with a second manual ball valve (9) at the inlet end.

5. The automatic dry-firing control system for tar treatment in a kiln according to claim 3, characterized in that, The filter pressure reducing assembly includes a filter (10), a first digital display pressure gauge (11), a pressure reducing valve (12), and a second digital display pressure gauge (13). The filter (10) is located on the outside of the gas pipeline (3) and on the side of the second manual ball valve (9). The first digital display pressure gauge (11) is located on the side of the filter (10), and the pressure reducing valve (12) is located on the side of the first digital display pressure gauge (11). The gas pipeline (3) is connected to the first gas outlet pipe (7), and the second digital display pressure gauge (13) is located on the outside of the first gas outlet pipe (7) and below the first digital display pressure gauge (11).

6. The automatic dry-firing control system for tar treatment in a kiln according to claim 3, characterized in that, The flow monitoring and regulation component includes a thermal flow meter (14) and a pressure relief ball valve (15). The thermal flow meter (14) is located on the side of the second digital display pressure gauge (13) on the outside of the first air outlet pipe (7). The pressure relief ball valve (15) is located on the side of the thermal flow meter (14), and a third manual ball valve (16) is located on the side of the pressure relief ball valve (15).

7. The automatic dry-firing control system for tar treatment in a kiln according to claim 3, characterized in that, The first vent pipe (7) has a flange (17) on its side, and the flange (17) is connected to the second vent pipe (18) by bolts (19).

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