An integrated device and method for deep regeneration of activated carbon

Abstract

The present application relates to the field of activated carbon regeneration, discloses a kind of activated carbon deep regeneration integrated device and regeneration method, the activated carbon deep regeneration integrated device, including top cover, the top cover is connected by bolt on regeneration box, the top cover is equipped with feed inlet, the bottom of the regeneration box is equipped with discharge port, the bottom surface of the regeneration box is fixed with motor, the output shaft of the motor is through regeneration box, and fixed with carousel, the carousel is equipped with a plurality of through holes, a plurality of the through hole can be detachably mounted with the placement cylinder, the carousel is fixed with a plurality of partition plates.In the present application, the step-by-step reaction treatment of activated carbon under different temperature and atmosphere conditions is realized, and different adsorbed pollutants are removed, thereby effectively realizing the step-by-step removal and deep degradation of pollutants, avoiding the pore structure collapse problem caused by single high-temperature treatment, and improving the activated carbon regeneration efficiency and regeneration activity recovery rate.

Description

Technical Field

[0001] This invention relates to the technical field of activated carbon regeneration, specifically to an integrated device and method for deep regeneration of activated carbon. Background Technology

[0002] Activated carbon is a specially treated form of carbon. Organic raw materials (such as fruit shells, coal, and wood) are heated in the absence of air to reduce non-carbon components (a process called carbonization). They then react with gases, causing surface erosion and creating a highly porous structure (a process called activation). Because activation is a microscopic process, with numerous molecular carbides eroding the surface in a point-like manner, the activated carbon surface has countless tiny pores. Activated carbon regeneration utilizes thermal regeneration. Thermal regeneration involves heating saturated activated carbon to a high temperature, causing harmful substances adsorbed on its surface to desorb and burn off at that temperature, thus regenerating the activated carbon. This method typically uses high-temperature furnaces, steam, or other heat sources and effectively removes pollutants adsorbed on the activated carbon surface.

[0003] The key technical features of the integrated heating and cooling device for activated carbon raw materials published in Chinese Patent Publication No. CN223788528U are as follows: the device includes a main body, in which a working chamber is provided. A turntable is rotatably connected to the inner wall of the working chamber. The outer wall of the turntable is in contact with the inner wall of the working chamber. A working groove distributed in a circular array is opened on the outer side of the turntable. A placement bucket is provided in the working groove. The inner wall of the placement bucket is formed with multiple filter holes distributed in a circular array.

[0004] In the above scheme, the rotating disc drives the placement tank and the internal activated carbon through the heating chamber in sequence and uses hot air nozzles for heating and regeneration. The entire process relies on a single heating zone to uniformly treat the activated carbon at high temperatures, and there is no temperature gradient change or graded reaction control mechanism. This results in the following drawbacks: the activated carbon cannot be processed in stages during the regeneration process, causing the adsorbed pollutants to undergo uncontrollable decomposition under the same high temperature conditions. This can easily lead to problems such as localized overly rapid reactions or insufficient reactions. At the same time, the lack of graded thermal regulation leads to the asynchronous process of pore structure repair and pollutant removal, which causes the activated carbon's pore structure to collapse, reducing the activated carbon regeneration efficiency and regeneration activity recovery rate. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated device and method for deep regeneration of activated carbon, in order to solve the problems that activated carbon cannot be processed in stages during regeneration, causing adsorbed pollutants to undergo uncontrollable decomposition under the same high temperature conditions, which can easily lead to local reactions that are too fast or insufficient. At the same time, the lack of stepwise thermal regulation leads to the asynchronous process of pore structure repair and pollutant removal, resulting in the collapse of the pore structure of activated carbon and reducing the regeneration efficiency and regeneration activity recovery rate.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution: an integrated deep regeneration device for activated carbon, comprising a top cover bolted to a regeneration chamber, an inlet on the top cover, an outlet at the bottom of the regeneration chamber, a motor fixed to the bottom of the regeneration chamber, the output shaft of the motor penetrating the regeneration chamber and fixed to a turntable, a plurality of through holes on the turntable, and a placement cylinder detachably installed in each of the through holes, the cylinder wall of the placement cylinder having a plurality of air inlets, the outer wall of the placement cylinder having a plurality of air inlets, and a plurality of sub-types fixed on the turntable. The regeneration chamber has a partition, a low-temperature zone, a medium-temperature zone, and a high-temperature zone. Several heaters are fixed to the outer wall of the regeneration chamber, and each heater is equipped with a first air pump. The output ends of each first air pump are connected to the low-temperature zone, the medium-temperature zone, and the high-temperature zone via first air pipes. An inert gas tank and an oxygen tank are fixed to the top cover. Second air pumps are fixed to both the inert gas tank and the oxygen tank. Delivery pipes connect the output ends of two second air pumps to the top cover. A PLC controller is fixed to the front of the top cover.

[0007] Preferably, a gas sensor is fixedly connected to the top surface of the top cover, and the gas sensor corresponds to the low temperature zone. An oxygen concentration sensor is fixedly connected to the top surface of the top cover, and the oxygen concentration sensor corresponds to the medium temperature zone. Solenoid valves are provided on both delivery pipes. The gas sensor, oxygen concentration sensor and solenoid valves are all electrically connected to the PLC controller.

[0008] Preferably, the regeneration chamber has a cooling zone inside, a cooler is fixed to the outer wall of the regeneration chamber, a third air pump is fixed to the cooler, a second air pipe is fixed to the output end of the third air pump and the cooling zone, an exhaust pipe is fixed to the top surface of the top cover, and the cooler and the third air pump are both electrically connected to the PLC controller.

[0009] Preferably, a fourth air pump is fixed on the top surface of the top cover, a suction pipe is fixedly connected between the input end of the fourth air pump and the top cover, an air supply pipe is fixedly connected between the output end of the fourth air pump and the top cover, the air supply pipe corresponds to the high-temperature zone, and the fourth air pump is electrically connected to the PLC controller.

[0010] Preferably, a feed hopper is fixed to the top surface of the top cover, and the feed hopper corresponds to the feed inlet.

[0011] Preferably, a positioning block is fixed to the bottom surface of the top cover, and a positioning groove is provided on the top surface of the recycling box, the positioning groove positioning the positioning block.

[0012] Preferably, the inner walls of the plurality of through holes are provided with internal threads, the outer walls of the plurality of placement cylinders are provided with external threads, and the plurality of external threads are threadedly connected to the plurality of internal threads.

[0013] Preferably, a guide pipe is fixed to the bottom surface of the recycling box, and the guide pipe corresponds to the discharge port.

[0014] This invention also provides a method for deep regeneration of activated carbon, which employs a regeneration box with a low-temperature zone, a medium-temperature zone, a high-temperature zone, and a cooling zone, several placement cylinders that can rotate with a turntable, and a return gas path for returning gas from the transition zone to the high-temperature zone, to continuously process the activated carbon to be regenerated in different zones, including the following steps: S1. The activated carbon to be regenerated is fed into the placement cylinder through the feed inlet. The motor drives the turntable to rotate, so that each placement cylinder passes through the low temperature zone, medium temperature zone, high temperature zone and cooling zone in sequence. The adjacent processing zones are isolated by the partition plate.

[0015] S2. When the placement cylinder enters the low-temperature zone, hot gas is introduced into the low-temperature zone and inert gas is supplied into the placement cylinder. The inert gas supply and the corresponding solenoid valve opening are adjusted according to the gas detection results in the low-temperature zone to maintain a low-oxygen desorption environment in the low-temperature zone.

[0016] S3. When the placement cylinder enters the medium temperature zone, the activated carbon is heated and oxygen is intermittently supplied to the medium temperature zone. The oxygen supply interval and oxygen supply amount are adjusted according to the oxygen concentration detection results in the medium temperature zone to maintain a micro-oxygen reaction environment in the medium temperature zone.

[0017] S4. When the placement cylinder enters the high-temperature zone, a high-temperature heat flow is sent into the high-temperature zone to perform high-temperature activation treatment on the activated carbon after low-temperature desorption and medium-temperature pyrolysis.

[0018] S5. When the placement cylinder is transferred from the high temperature zone to the cooling zone, the residual high temperature gas in the transition zone is extracted and the extracted residual high temperature gas is returned to the high temperature zone.

[0019] S6. When the placement cylinder enters the cooling zone, cooling gas is supplied to the cooling zone to cool the placement cylinder and the regenerated activated carbon therein, and the residual gas is discharged.

[0020] S7. When the placement cylinder rotates to the corresponding position of the discharge port, the regenerated activated carbon is discharged through the discharge port.

[0021] Compared with existing technologies, the integrated activated carbon deep regeneration device using the above technical solution has the following beneficial effects: I. This invention establishes low-temperature, medium-temperature, and high-temperature zones within the regeneration chamber, with a rotating disc driving multiple placement cylinders sequentially through each zone. This allows the activated carbon to be regenerated to undergo zoned treatment in the order of low-temperature desorption, medium-temperature pyrolysis, and high-temperature activation. In the low-temperature zone, low-boiling-point and volatile pollutants are first removed under inert gas protection. The medium-temperature zone then treats more difficult-to-desorb organic pollutants under micro-oxygen conditions. Finally, the high-temperature zone deeply activates residual coking compounds. This treatment method avoids the problems of concentrated pollutant decomposition and intense localized reactions in traditional single-temperature regeneration. It seamlessly integrates the pollutant removal process with the pore structure recovery process, which helps reduce activated carbon pore collapse and excessive ablation, thereby improving the adsorption performance recovery rate of the regenerated activated carbon.

[0022] II. This invention utilizes a gas sensor, an oxygen concentration sensor, a solenoid valve, and a PLC controller to regulate the low-oxygen environment in the low-temperature zone and the micro-oxygen environment in the medium-temperature zone. In the low-temperature treatment stage, the inert gas supply can be adjusted according to the gas state, allowing activated carbon to complete desorption at lower oxygen levels and reducing the risk of premature oxidation. In the medium-temperature treatment stage, the oxygen supply interval and quantity can be adjusted according to the oxygen concentration, allowing organic pollutants to decompose and oxidize under controlled micro-oxygen conditions. This avoids excessive oxygen supply causing localized combustion, and also avoids insufficient oxygen supply leading to pollutant residue. Therefore, the atmospheric conditions in each treatment zone can be matched to the corresponding temperature stage, improving the stability and consistency of the zoned regeneration process.

[0023] Third, this invention incorporates a suction and return structure between the high-temperature zone and the cooling zone. When the placement cylinder moves from the high-temperature zone to the cooling zone, residual high-temperature gas in the transition area can be extracted and returned to the high-temperature zone. This reduces the direct entry of high-temperature gas into the cooling zone, lowering the cooling load, and allows residual heat to participate in the high-temperature activation process again, improving thermal energy utilization. After the regenerated activated carbon enters the cooling zone, cooling gas is supplied through a refrigerator, a third air pump, and a second air pipe, while residual gas is discharged through an exhaust pipe. This ensures that the regenerated activated carbon is cooled to a suitable temperature before discharge, reducing the safety risks associated with high-temperature discharge and the difficulty of subsequent collection.

[0024] IV. The placement cylinder of this invention is detachably installed in the through hole of the turntable. The top cover is positioned by a positioning block and a positioning groove, and is connected to the regeneration box by bolts, facilitating the removal of the top cover and the placement cylinder during maintenance. The placement cylinder is installed by a thread, which can maintain a relatively stable connection during turntable rotation and temperature changes, and also facilitates the cleaning of coking residues inside the cylinder or the replacement of individual placement cylinders. With a guide pipe installed below the discharge port, the regenerated activated carbon can be discharged along a fixed path, reducing particle scattering and accumulation during discharge, making the device more suitable for continuous regeneration and centralized collection. Attached Figure Description

[0025] Figure 1 This is a perspective view of an embodiment.

[0026] Figure 2 This is a breakdown diagram of an embodiment.

[0027] Figure 3 This is a schematic diagram of the splitting at the partition plate in an embodiment.

[0028] Figure 4 This is a cross-sectional schematic diagram of the regeneration box in an embodiment.

[0029] Figure 5 This is a schematic diagram showing the disassembly of the turntable and placement cylinder in an embodiment.

[0030] Figure 6 This is a cross-sectional schematic diagram of the feed hopper in an embodiment.

[0031] Figure 7 For the example Figure 2 Enlarged diagram of point A in the middle.

[0032] In the diagram: 1. Top cover; 2. Regeneration box; 3. Feed inlet; 4. Discharge outlet; 5. Motor; 6. Turntable; 7. Through hole; 8. Placement cylinder; 9. Divider plate; 10. Low temperature zone; 11. Medium temperature zone; 12. High temperature zone; 13. Heater; 14. First air pump; 15. First air pipe; 16. Inert gas tank; 17. Oxygen tank; 18. Second air pump; 19. Conveying pipe; 20. PLC controller; 21. Gas sensor; 22. Oxygen concentration sensor; 23. Solenoid valve; 24. Cooling zone; 25. Refrigerator; 26. Third air pump; 27. Second air pipe; 28. Exhaust pipe; 29. ​​Fourth air pump; 30. Suction pipe; 31. Gas delivery pipe; 32. Feed hopper; 33. Positioning block; 34. Positioning groove; 35. Internal thread; 36. External thread; 37. Guide pipe. Detailed Implementation

[0033] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0034] Example 1 like Figures 1 to 5and Figure 7 As shown, this embodiment provides an integrated device for deep regeneration of activated carbon, including a top cover 1 and a regeneration box 2. The top cover 1 is bolted to the upper end of the regeneration box 2. A feed inlet 3 is provided on the top cover 1, and a discharge outlet 4 is provided at the bottom of the regeneration box 2. A motor 5 is mounted on the bottom surface of the regeneration box 2, and the output shaft of the motor 5 passes through the regeneration box 2 and is connected to a turntable 6. Several through holes 7 are provided on the turntable 6, and placement cylinders 8 are detachably installed in each through hole 7. Several air inlets are provided on the wall of each placement cylinder 8. Several partition plates 9 are also fixedly installed on the turntable 6, arranged circumferentially along the turntable 6, so that the rotation of the turntable 6 can drive the placement cylinders 8 to move sequentially between different processing areas.

[0035] The regeneration chamber 2 has a low-temperature zone 10, a medium-temperature zone 11, and a high-temperature zone 12 along the moving path of the placement cylinder 8. Several heaters 13 are fixed to the outer wall of the regeneration chamber 2, each corresponding to a different processing zone. A first air pump 14 is fixed to each heater 13, and the output of the first air pump 14 is connected to the low-temperature zone 10, the medium-temperature zone 11, and the high-temperature zone 12 via a first air pipe 15. An inert gas tank 16 and an oxygen tank 17 are fixed to the top cover 1. A second air pump 18 is fixed to both the inert gas tank 16 and the oxygen tank 17, and the outputs of the two second air pumps 18 are connected to the top cover 1 via delivery pipes 19. A PLC controller 20 is fixed to the front of the top cover 1. The motor 5, heaters 13, first air pump 14, and second air pump 18 are all electrically connected to the PLC controller 20. In this embodiment, the PLC controller 20 is a Siemens S7-200 controller.

[0036] During operation, the activated carbon to be regenerated enters the placement cylinder 8 through the feed inlet 3. The PLC controller 20 controls the motor 5 to start, and the motor 5 drives the turntable 6 to rotate. The turntable 6 drives each placement cylinder 8 to move along the circumferential path inside the regeneration box 2. The placement cylinder 8 passes through the low temperature zone 10, the medium temperature zone 11, and the high temperature zone 12 in sequence. The partition plate 9 rotates synchronously with the turntable 6 and forms a barrier between adjacent placement cylinders 8, making it difficult for the heat flow and atmosphere in different processing areas to mix directly.

[0037] After the placement cylinder 8 enters the low-temperature zone 10, the PLC controller 20 controls the operation of the heater 13 and the first air pump 14 corresponding to the low-temperature zone 10. The first air pump 14 sends the hot gas generated by the heater 13 into the low-temperature zone 10 through the first air pipe 15, creating a low-temperature heat treatment environment in the low-temperature zone 10. At the same time, the PLC controller 20 controls the operation of the second air pump 18 corresponding to the inert gas tank 16. The inert gas enters the regeneration box 2 through the delivery pipe 19 and enters the activated carbon stack through the air inlet on the cylinder wall of the placement cylinder 8, creating a low-oxygen atmosphere in the low-temperature zone 10. Under the combined action of the low-temperature hot gas and the inert gas, the low-boiling-point pollutants adsorbed by the activated carbon are desorbed first, reducing the concentrated release in the subsequent heating stage.

[0038] After the placement cylinder 8 enters the intermediate temperature zone 11 along with the turntable 6, the PLC controller 20 controls the operation of the heater 13 and the first air pump 14 corresponding to the intermediate temperature zone 11. The first air pump 14 sends intermediate temperature hot air into the intermediate temperature zone 11 through the first air pipe 15 to further heat the activated carbon after low-temperature desorption. The PLC controller 20 controls the second air pump 18 corresponding to the oxygen tank 17 to operate intermittently, so that oxygen enters the regeneration box 2 through the delivery pipe 19 and diffuses into the activated carbon pile in the placement cylinder 8. A controlled micro-oxygen environment is formed in the intermediate temperature zone 11, causing the residual organic pollutants in the activated carbon pores to undergo thermal decomposition and controlled oxidation, avoiding a violent one-time reaction at high temperature.

[0039] After the placement cylinder 8 enters the high-temperature zone 12, the PLC controller 20 controls the operation of the heater 13 and the first air pump 14 corresponding to the high-temperature zone 12. The first air pump 14 sends high-temperature heat flow into the high-temperature zone 12 through the first air pipe 15 to activate the activated carbon after low-temperature desorption and medium-temperature pyrolysis. During this stage, residual coke is further pyrolyzed or removed, and the pores blocked by pollutants are reopened, restoring the pore structure of the activated carbon. The low-temperature zone 10, the medium-temperature zone 11, and the high-temperature zone 12 are separated by a partition plate 9, which reduces the backflow of heat flow from the high-temperature zone 12 to the previous treatment zone and also reduces the amount of oxygen supplied from the medium-temperature zone 11 entering the high-temperature zone 12.

[0040] like Figures 1 to 4 and Figure 7 As shown, a gas sensor 21 is fixedly connected to the top surface of the top cover 1, corresponding to the low-temperature zone 10. An oxygen concentration sensor 22 is also fixedly connected to the top surface of the top cover 1, corresponding to the medium-temperature zone 11. Solenoid valves 23 are installed on both delivery pipes 19. The gas sensor 21, oxygen concentration sensor 22, and solenoid valves 23 are all electrically connected to the PLC controller 20. A cooling zone 24 is provided inside the regeneration chamber 2. A cooler 25 is fixed to the outer wall of the regeneration chamber 2. A third air pump 26 is fixed to the cooler 25, and the output end of the third air pump 26 is connected to the cooling zone 24 through a second air pipe 27. An exhaust pipe 28 is fixedly connected to the top surface of the top cover 1. The cooler 25 and the third air pump 26 are both electrically connected to the PLC controller 20.

[0041] Gas sensor 21 collects gas state signals within the low-temperature zone 10 and transmits the detection signals to PLC controller 20. Based on the detection results from gas sensor 21, PLC controller 20 adjusts the gas supply to the second gas pump 18 corresponding to the inert gas tank 16 and the opening degree of solenoid valve 23 to maintain a low-oxygen desorption state in the low-temperature zone 10. Oxygen concentration sensor 22 collects oxygen concentration signals within the medium-temperature zone 11 and transmits the detection signals to PLC controller 20. Based on the detection results from oxygen concentration sensor 22, PLC controller 20 adjusts the oxygen supply interval and amount to the second gas pump 18 corresponding to the oxygen tank 17 and the opening degree of solenoid valve 23 to maintain a micro-oxygen reaction state in the medium-temperature zone 11, reducing the probability of localized over-oxygenation.

[0042] After the placement cylinder 8 enters the cooling zone 24 from the high-temperature zone 12, the PLC controller 20 controls the operation of the cooler 25 and the third air pump 26. The third air pump 26 sends the cooling gas generated by the cooler 25 into the cooling zone 24 through the second air pipe 27. The cooling gas exchanges heat with the placement cylinder 8 and the regenerated activated carbon inside the placement cylinder 8, causing the regenerated activated carbon to gradually cool down from its high-temperature activated state. During the cooling process, the residual gas in the regeneration box 2 is discharged through the exhaust pipe 28, reducing the retention of high-temperature residual gas in the regeneration box 2.

[0043] like Figures 1 to 4 and Figure 6 As shown, a fourth air pump 29 is fixed to the top surface of the top cover 1. The input end of the fourth air pump 29 is connected to the top cover 1 through a suction pipe 30, and the output end of the fourth air pump 29 is connected to the top cover 1 through an air supply pipe 31. The air supply pipe 31 corresponds to the high-temperature zone 12. The fourth air pump 29 is electrically connected to the PLC controller 20. A feed hopper 32 is fixed to the top surface of the top cover 1, and the feed hopper 32 corresponds to the feed inlet 3.

[0044] As the placement cylinder 8 moves from the high-temperature zone 12 to the cooling zone 24, the PLC controller 20 starts the fourth air pump 29. The fourth air pump 29 extracts the residual high-temperature gas in the transition area between the high-temperature zone 12 and the cooling zone 24 through the suction pipe 30, and sends the extracted residual high-temperature gas back to the high-temperature zone 12 through the gas delivery pipe 31. This gas return process can reduce the cooling load caused by the residual high-temperature gas entering the cooling zone 24, and at the same time allow the residual heat in the transition area to re-enter the high-temperature zone 12. The feed hopper 32 is set above the feed inlet 3 to introduce and collect the activated carbon to be regenerated, so that the material maintains a relatively stable falling path when entering the feed inlet 3 and reduces the outward dispersion during the feeding process.

[0045] like Figures 1 to 5 and Figure 7As shown, a positioning block 33 is fixed to the bottom surface of the top cover 1, and a positioning groove 34 is provided on the top surface of the recycling box 2, which mates with the positioning block 33. Each through hole 7 has an internal thread 35 on its inner wall, and each placement cylinder 8 has an external thread 36 on its outer wall, which is threadedly connected to the corresponding internal thread 35 on the inner wall of the through hole 7. A guide pipe 37 is fixed to the bottom surface of the recycling box 2, and the guide pipe 37 corresponds to the discharge port 4.

[0046] When the top cover 1 is installed in the regeneration box 2, the positioning block 33 first enters the positioning groove 34. The positioning groove 34 guides and limits the positioning block 33, ensuring that the installation position of the top cover 1 is consistent with that of the regeneration box 2. After the top cover 1 and the regeneration box 2 are aligned, they are then fastened together with bolts to ensure that the top cover 1 is stably installed on the regeneration box 2. The placement cylinder 8 is connected to the internal thread 35 on the inner wall of the through hole 7 via the external thread 36, allowing the placement cylinder 8 to be stably installed on the turntable 6. When maintenance is required, the top cover 1 can be removed and the placement cylinder 8 can be unscrewed to clean any residue inside the placement cylinder 8 or to replace the corresponding placement cylinder 8.

[0047] When the placement cylinder 8 rotates with the turntable 6 to the position corresponding to the discharge port 4, the regenerated activated carbon falls from the placement cylinder 8 under the action of gravity, enters the discharge port 4 through the through hole 7, and is then discharged to the external collection container through the guide pipe 37. The guide pipe 37 constrains the discharge path, so that the regenerated activated carbon can be discharged in a fixed direction, reducing particle dispersion and accumulation during the discharge process.

[0048] Example 2 This embodiment also provides a method for deep regeneration of activated carbon, which is implemented using the aforementioned integrated deep regeneration device for activated carbon. The method employs a regeneration box equipped with a low-temperature zone, a medium-temperature zone, a high-temperature zone, and a cooling zone, as well as several placement cylinders capable of rotating with a turntable to continuously process the activated carbon to be regenerated in different zones. Specifically, it includes the following steps: S1. The activated carbon to be regenerated is fed into the placement cylinder through the feed inlet. The motor drives the turntable to rotate, so that each placement cylinder passes through the low temperature zone, medium temperature zone, high temperature zone and cooling zone in sequence. The adjacent processing zones are isolated by the partition plate. In this step, the activated carbon to be regenerated is fed into the feed inlet 3 via the feed hopper 32 and falls into the corresponding placement cylinder 8. The PLC controller 20 controls the motor 5 to start, and the output shaft of the motor 5 drives the turntable 6 to rotate. The turntable 6 drives multiple placement cylinders 8 to move along the processing path inside the regeneration box 2. The partition plate 9 is synchronously set between adjacent placement cylinders 8 along with the turntable 6. When the placement cylinder 8 passes through the low temperature zone 10, the medium temperature zone 11, the high temperature zone 12 and the cooling zone 24, the partition plate 9 can reduce the direct crosstalk of heat flow and atmosphere between adjacent areas, so that each processing zone maintains a relatively independent processing environment.

[0049] S2. When the placement cylinder enters the low-temperature zone, hot gas is introduced into the low-temperature zone and inert gas is supplied into the placement cylinder. The inert gas supply and the corresponding solenoid valve opening are adjusted according to the gas detection results in the low-temperature zone to maintain a low-oxygen desorption environment in the low-temperature zone. In this step, after the placement cylinder 8 enters the low-temperature zone 10, the PLC controller 20 controls the operation of the heater 13 and the first air pump 14 corresponding to the low-temperature zone 10. The first air pump 14 sends the hot gas generated by the heater 13 into the low-temperature zone 10 through the first air pipe 15, creating a low-temperature heat treatment environment in the low-temperature zone 10. Simultaneously, the PLC controller 20 controls the operation of the second air pump 18 corresponding to the inert gas tank 16, allowing the inert gas to enter the regeneration box 2 through the delivery pipe 19 and then enter the activated carbon stack through the air inlet on the wall of the placement cylinder 8. The gas sensor 21 detects the gas state in the low-temperature zone 10 and feeds the detection signal back to the PLC controller 20. Based on the detection result, the PLC controller 20 adjusts the air supply of the second air pump 18 and the opening of the corresponding solenoid valve 23 to maintain a low-oxygen state in the low-temperature zone 10, allowing low-boiling-point or volatile pollutants in the activated carbon to desorb first.

[0050] S3. When the placement cylinder enters the medium temperature zone, the activated carbon is heated and oxygen is intermittently supplied to the medium temperature zone. The oxygen supply interval and oxygen supply amount are adjusted according to the oxygen concentration detection results in the medium temperature zone to maintain a micro-oxygen reaction environment in the medium temperature zone. In this step, after the placement cylinder 8 enters the intermediate temperature zone 11 along with the turntable 6, the PLC controller 20 controls the heater 13 and the first air pump 14 corresponding to the intermediate temperature zone 11 to operate, so that the intermediate temperature zone 11 forms a heat treatment environment higher than that of the low temperature zone 10, and continues to heat up the activated carbon after low-temperature desorption. At the same time, the PLC controller 20 controls the second air pump 18 corresponding to the oxygen tank 17 to intermittently supply oxygen. Oxygen enters the intermediate temperature zone 11 through the delivery pipe 19 and diffuses into the activated carbon pile in the placement cylinder 8. The oxygen concentration sensor 22 detects the oxygen concentration in the intermediate temperature zone 11 and feeds the detection signal back to the PLC controller 20. The PLC controller 20 adjusts the oxygen supply interval, the oxygen supply of the second air pump 18, and the opening degree of the corresponding solenoid valve 23 according to the oxygen concentration detection result, so that the intermediate temperature zone 11 maintains a micro-oxygen reaction environment, allowing the organic pollutants that are difficult to desorb in the activated carbon to undergo thermal decomposition and controlled oxidation.

[0051] S4. When the placement cylinder enters the high-temperature zone, a high-temperature heat flow is sent into the high-temperature zone to perform high-temperature activation treatment on the activated carbon after low-temperature desorption and medium-temperature pyrolysis. In this step, after the placement cylinder 8 enters the high-temperature zone 12, the PLC controller 20 controls the heater 13 and the first air pump 14 corresponding to the high-temperature zone 12 to start. The first air pump 14 sends high-temperature heat flow into the high-temperature zone 12 through the first air pipe 15 to perform high-temperature activation treatment on the activated carbon after low-temperature desorption and medium-temperature pyrolysis. During this process, the coke remaining in the activated carbon pores is further pyrolyzed or removed, reopening the pores occupied or blocked by pollutants, thereby restoring the pore structure and adsorption capacity of the activated carbon. Since the low-temperature zone 10, the medium-temperature zone 11 and the high-temperature zone 12 are isolated by the partition plate 9, the heat flow in the high-temperature zone 12 is not easily directly returned to the previous treatment zone, and the oxygen supply atmosphere in the medium-temperature zone 11 is not easily directly introduced into the high-temperature zone 12.

[0052] S5. When the placement cylinder is transferred from the high temperature zone to the cooling zone, the residual high temperature gas in the transition zone is extracted and the extracted residual high temperature gas is returned to the high temperature zone. In this step, when the placement cylinder 8 moves from the high-temperature zone 12 to the cooling zone 24, the PLC controller 20 starts the fourth air pump 29. The fourth air pump 29 extracts the residual high-temperature gas in the transition area between the high-temperature zone 12 and the cooling zone 24 through the suction pipe 30, and returns the extracted residual high-temperature gas to the high-temperature zone 12 through the gas delivery pipe 31. Through the above gas return process, the increased cooling load after the high-temperature gas enters the cooling zone 24 can be reduced, while the residual heat can be re-entered into the high-temperature zone 12 to participate in the heat treatment process.

[0053] S6. When the placement cylinder enters the cooling zone, cooling gas is supplied to the cooling zone to cool the placement cylinder and the regenerated activated carbon therein, and the residual gas is discharged. In this step, after the placement cylinder 8 enters the cooling zone 24, the PLC controller 20 starts the cooler 25 and the third air pump 26. The third air pump 26 sends the cooling gas generated by the cooler 25 into the cooling zone 24 through the second air pipe 27 to cool the placement cylinder 8 and the regenerated activated carbon inside it. During the cooling process, the residual gas in the regeneration box 2 is discharged through the exhaust pipe 28, gradually reducing the temperature of the regenerated activated carbon from a high-temperature activated state to a temperature range suitable for subsequent discharge and collection, thus reducing the safety risks caused by high-temperature discharge.

[0054] S7. When the placement cylinder rotates to the corresponding position of the discharge port, the regenerated activated carbon is discharged through the discharge port.

[0055] In this step, as the placement cylinder 8 continues to rotate with the turntable 6 to the position corresponding to the discharge port 4, the regenerated activated carbon falls downward from the placement cylinder 8 under the action of gravity and enters the feed pipe 37 through the through hole 7 and the discharge port 4. The feed pipe 37 centrally guides the regenerated activated carbon, allowing it to be stably discharged to an external collection container. Through the above steps, the regenerated activated carbon sequentially completes the low-temperature inert desorption, medium-temperature micro-oxygen pyrolysis, high-temperature activation, waste heat recovery, cooling, and discharge processes, thereby achieving continuous, zoned, deep regeneration.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An integrated device for deep regeneration of activated carbon, comprising a top cover (1), the top cover (1) being bolted to a regeneration box (2), characterized in that, The top cover (1) has a feed inlet (3), the bottom of the recycling box (2) has a discharge outlet (4), the bottom surface of the recycling box (2) is fixed with a motor (5), the output shaft of the motor (5) passes through the recycling box (2) and is fixed with a turntable (6), the turntable (6) has several through holes (7), and each of the several through holes (7) is detachably installed with a placement cylinder (8), the cylinder wall of the placement cylinder (8) has several air inlets, the turntable (6) is fixed with several partition plates (9), the recycling box (2) has a low temperature zone (10), the recycling box (2) has a medium temperature zone (11), the recycling box (2) has a high temperature zone (12), the recycling box (2) has a low temperature zone (10), the recycling box (2) has a medium temperature zone (11), the recycling box (2) has a high temperature zone (12), the recycling box (2) A number of heaters (13) are fixed on the outer wall. A first air pump (14) is fixed on each of the heaters (13). A first air pipe (15) is fixed between the output end of the first air pump (14) and the low temperature zone (10), the medium temperature zone (11) and the high temperature zone (12). An inert gas tank (16) is fixed on the top cover (1). An oxygen tank (17) is fixed on the top cover (1). A second air pump (18) is fixed on both the inert gas tank (16) and the oxygen tank (17). A delivery pipe (19) is fixed between the output end of the two second air pumps (18) and the top cover (1). A PLC controller (20) is fixed on the front side of the top cover (1).

2. The integrated activated carbon deep regeneration device according to claim 1, characterized in that: A gas sensor (21) is fixedly connected to the top surface of the top cover (1), and the gas sensor (21) corresponds to the low temperature zone (10). An oxygen concentration sensor (22) is fixedly connected to the top surface of the top cover (1), and the oxygen concentration sensor (22) corresponds to the medium temperature zone (11). Solenoid valves (23) are provided on both of the delivery pipes (19). The gas sensor (21), oxygen concentration sensor (22) and solenoid valves (23) are all electrically connected to the PLC controller (20).

3. The integrated device for deep regeneration of activated carbon according to claim 2, characterized in that: The regeneration box (2) has a cooling zone (24) inside. A cooler (25) is fixed on the outer wall of the regeneration box (2). A third air pump (26) is fixed on the cooler (25). A second air pipe (27) is fixed between the output end of the third air pump (26) and the cooling zone (24). An exhaust pipe (28) is fixed on the top surface of the top cover (1). The cooler (25) and the third air pump (26) are both electrically connected to the PLC controller (20).

4. The integrated activated carbon deep regeneration device according to claim 3, characterized in that: A fourth air pump (29) is fixed on the top surface of the top cover (1). A suction pipe (30) is fixed between the input end of the fourth air pump (29) and the top cover (1). A gas delivery pipe (31) is fixed between the output end of the fourth air pump (29) and the top cover (1). The gas delivery pipe (31) corresponds to the high temperature zone (12). The fourth air pump (29) is electrically connected to the PLC controller (20).

5. The integrated device for deep regeneration of activated carbon according to claim 4, characterized in that: The top surface of the top cover (1) is fixed with a feed hopper (32), which corresponds to the feed inlet (3).

6. The integrated device for deep regeneration of activated carbon according to claim 1, characterized in that: The bottom surface of the top cover (1) is fixed with a positioning block (33), and the top surface of the recycling box (2) is provided with a positioning groove (34), which positions the positioning block (33).

7. The integrated activated carbon deep regeneration device according to claim 6, characterized in that: The inner walls of several through holes (7) are provided with internal threads (35), and the outer walls of several placement cylinders (8) are provided with external threads (36). The external threads (36) are threadedly connected to the internal threads (35).

8. The integrated activated carbon deep regeneration device according to claim 7, characterized in that: The bottom surface of the recycling box (2) is fixed with a guide pipe (37), which corresponds to the discharge port (4).

9. A method for deep regeneration of activated carbon, characterized in that, The method employs a regeneration box equipped with a low-temperature zone, a medium-temperature zone, a high-temperature zone, and a cooling zone; several placement cylinders that can rotate with a turntable; and a return gas path for returning gas from the transition zone to the high-temperature zone. This method performs continuous zoned treatment of the activated carbon to be regenerated, and includes the following steps: S1. The activated carbon to be regenerated is fed into the placement cylinder through the feed inlet. The motor drives the turntable to rotate, so that each placement cylinder passes through the low temperature zone, medium temperature zone, high temperature zone and cooling zone in sequence. The adjacent processing zones are isolated by the partition plate. S2. When the placement cylinder enters the low-temperature zone, hot gas is introduced into the low-temperature zone and inert gas is supplied into the placement cylinder. The inert gas supply and the corresponding solenoid valve opening are adjusted according to the gas detection results in the low-temperature zone to maintain a low-oxygen desorption environment in the low-temperature zone. S3. When the placement cylinder enters the medium temperature zone, the activated carbon is heated and oxygen is intermittently supplied to the medium temperature zone. The oxygen supply interval and oxygen supply amount are adjusted according to the oxygen concentration detection results in the medium temperature zone to maintain a micro-oxygen reaction environment in the medium temperature zone. S4. When the placement cylinder enters the high-temperature zone, a high-temperature heat flow is sent into the high-temperature zone to perform high-temperature activation treatment on the activated carbon after low-temperature desorption and medium-temperature pyrolysis. S5. When the placement cylinder is transferred from the high temperature zone to the cooling zone, the residual high temperature gas in the transition zone is extracted and the extracted residual high temperature gas is returned to the high temperature zone. S6. When the placement cylinder enters the cooling zone, cooling gas is supplied to the cooling zone to cool the placement cylinder and the regenerated activated carbon therein, and the residual gas is discharged. S7. When the placement cylinder rotates to the corresponding position of the discharge port, the regenerated activated carbon is discharged through the discharge port.

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