A device and method for ultrasonic-microwave combined regeneration of waste activated carbon

Abstract

The present invention relates to the field of activated carbon regeneration technology, and in particular to a device and method for ultrasonic-microwave combined regeneration of waste activated carbon. The present invention includes a movable box, a quartz regeneration barrel, a quartz tray, a rotating motor, a sealing device, a timing and power control system, a microwave and an ultrasonic generating device; the quartz tray is connected to the rotating motor through a rotating shaft; the timing and power control system is connected to the rotating motor, the microwave and the ultrasonic generating device and controls them. The device of the present invention integrates ultrasonic cleaning, microwave heating and drying, and microwave heating activated carbon regeneration, and the overall structure is relatively simple and can be miniaturized. During the regeneration process, the activated carbon heats up rapidly, the regeneration time is short, the regeneration effect is good, and the general regeneration rate exceeds 95%. After multiple cycles of regeneration, the regeneration rate can also be maintained at more than 90%, and the regeneration energy consumption is extremely low.

Description

Technical Field

[0001] The invention relates to the technical field of activated carbon regeneration, and in particular to a device and method for ultrasonic-microwave combined regeneration of waste activated carbon. Background Art

[0002] Activated carbon adsorption is a mature technology. As an excellent and inexpensive adsorbent, activated carbon is widely used in air pollution control, solvent recovery, food processing, metal recovery, catalysis and wastewater treatment processes (adsorbents include dyes, heavy metals, detergents, herbicides, pesticides and polycyclic aromatic hydrocarbons, etc.) due to its developed pore structure, huge specific surface area, excellent adsorption performance, simple equipment and convenient operation. However, the adsorption capacity of activated carbon is limited. When the activated carbon adsorption reaches its saturation limit, the discarded activated carbon becomes solid waste, and some of it even belongs to hazardous solid waste.

[0003] However, most of the waste activated carbon is usually discarded or dumped in landfills, some is directly incinerated, and only a small part is used for regeneration. At present, the main regeneration methods include thermal regeneration, chemical regeneration, electrochemical regeneration, ultrasonic regeneration, microwave regeneration, etc.

[0004] Among them, the most widely used and mature technology is thermal regeneration under mild oxidation or inert atmosphere. However, the thermal regeneration process is very time-consuming and energy-consuming, usually requiring several hours of heating, and the equipment is large and difficult to miniaturize. The cost of a single regeneration is also high, up to 1 / 3 of the price of new activated carbon, and the pore structure of the regenerated carbon after multiple regeneration cycles is significantly deteriorated. Various shortcomings limit the further development and application of thermal regeneration.

[0005] Chemical regeneration is the use of a specific solvent to desorb the adsorbate. It is mainly used when the activated carbon adsorbent needs to be recycled. The main disadvantage of this process is that the regeneration efficiency mainly depends on the solubility of the adsorbent and the effect of the applied pressure on the activated carbon structure. The regeneration is not thorough, and the recovery rate is usually around 70%-90%. In addition, it is not suitable for cyclic regeneration. In addition, additional steps such as recovering the extractant are usually involved after the desorption process, which leads to higher application costs.

[0006] The technology of electrochemical regeneration is not mature at present and is still in the experimental stage; ultrasonic regeneration method is also receiving more and more attention, but various experiments have shown that ultrasonic regeneration method only has a removal effect on the physical adsorption part of activated carbon, and is basically powerless against the chemical adsorption part.

[0007] Microwave regeneration is a new activated carbon regeneration technology developed on the basis of thermal regeneration after numerous studies. It has rapid heating, short regeneration time, low energy consumption, high efficiency, and is suitable for multiple cycles of regeneration. Microwave heating can even further activate the activated carbon and increase the adsorption capacity, but the desorption effect on some special adsorbents may be relatively poor. Summary of the invention

[0008] In view of the shortcomings of traditional regeneration methods such as thermal regeneration, the present invention combines the advantages of ultrasonic regeneration and microwave regeneration to propose an ultrasonic-microwave combined regeneration device and method for waste activated carbon. Compared with traditional thermal regeneration, the device and method have the advantages of short regeneration time, low energy consumption, high efficiency, good effect, small required equipment size, simple structure, and multiple cyclic regeneration. Compared with existing microwave regeneration devices and methods, the device and method integrate multiple functions and can realize systematic ultrasonic cleaning, drying, and regeneration of activated carbon.

[0009] The technical solution of the present invention is an ultrasonic-microwave combined regeneration device for waste activated carbon, comprising a box body, a regeneration barrel and a tray arranged in the box body, wherein the box body comprises an external shell, a box door and an internal resonant cavity;

[0010] The door opens outward in one direction, a glass observation window is arranged in the middle of the door, a hinge connected to the box body is arranged on one side of the door, and a handle and a sealing lock are arranged on the other side;

[0011] The insulation layer is filled between the shell and the resonant cavity; the insulation layer of the same type is filled in the interlayer of the door;

[0012] An air inlet pipe is arranged on the top of the box body, and a connecting pipe is arranged on the bottom of the box body; both the air inlet pipe and the connecting pipe are inserted into the resonance cavity;

[0013] A motor is arranged inside the box, a rotating shaft is arranged at the output end of the motor, the rotating shaft is connected to the tray, and a sleeve is arranged along the outer circumference of the rotating shaft;

[0014] A plurality of feet are arranged at the bottom of the regeneration barrel, and the regeneration barrel is placed on a tray; a motor drives the rotating shaft to rotate, driving the tray and the regeneration barrel to rotate; a plurality of water tanks are reserved at the bottom of the regeneration barrel; a high temperature resistant filter membrane is laid at the bottom of the regeneration barrel;

[0015] Ultrasonic generators and magnetrons are arranged along the outer shell of the resonant cavity; the ultrasonic generator is located at the bottom of the resonant cavity, and the magnetrons are distributed in a ring array along the outer circumference of the resonant cavity;

[0016] A control system is integrated on the box, and the control system is electrically connected to the magnetron, the motor and the ultrasonic generator; the control system controls the power of the magnetron, the motor and the ultrasonic generator and sets the timing.

[0017] Preferably, a plurality of universal wheels are provided at the bottom of the box body for easy movement.

[0018] Preferably, dust covers are provided on the sides of the air inlet pipe and the connecting pipe inserted into the resonance cavity.

[0019] Preferably, the thermal insulation layer is pre-cut to reserve installation positions for the magnetron, the rotating motor, and the ultrasonic generator.

[0020] Preferably, a four-way connection is installed on the connecting pipe, which is respectively connected to the water inlet pipe, the drain pipe and the air outlet pipe; the water inlet pipe, the drain pipe and the air outlet pipe are all provided with solenoid valves for controlling opening and closing; and the control system controls the opening and closing of the solenoid valves.

[0021] Preferably, a gap of 30-40 mm is left between the regeneration barrel and the inner wall of the resonance cavity and the inner wall of the box door to form a flow channel for nitrogen or cleaning liquid.

[0022] A method for regenerating waste activated carbon by ultrasonic-microwave combined regeneration comprises the following specific steps:

[0023] S1. Lay a high temperature resistant filter membrane at the bottom of the regeneration barrel, fill the waste activated carbon into the quartz regeneration barrel, close the box door and seal the lock, open the water inlet pipe, fill it with water and close the valve, turn on the ultrasonic generator to perform ultrasonic cleaning pretreatment on the waste activated carbon, and then open the drain pipe valve to drain the waste water in the box;

[0024] S2. Leave the cleaned waste activated carbon in the regeneration barrel, connect the air inlet pipe to the nitrogen bottle, open the air outlet pipe to connect the pipeline for tail gas collection and treatment, open the valve to introduce nitrogen to exhaust the air in the box, and control the magnetron to generate microwave radiation at low power to heat and dry the waste activated carbon;

[0025] S3. Set the regeneration time and power according to the percentage of the waste activated carbon to be regenerated in the regeneration barrel capacity to ensure that the microwave regeneration process is in an oxygen-free or anoxic environment. During the regeneration process, observe and measure the temperature through the observation window installed on the door;

[0026] S4. Maintain an oxygen-free or anoxic environment, and cool the solid to obtain regenerated carbon after regeneration is completed.

[0027] Preferably, in S1, during the ultrasonic cleaning of the waste activated carbon, the cleaning liquid is water, a water-based cleaning agent or a solvent-based cleaning agent;

[0028] The ultrasonic generator uses 40kHz low-frequency ultrasonic waves to clean and pre-treat the waste activated carbon, and the cleaning time does not exceed 2 minutes.

[0029] Preferably, in S2, a low-power microwave drying method is used to dry the cleaned waste activated carbon; the waste activated carbon is dehydrated and dried at a temperature of 105 to 110° C. for 5 minutes;

[0030] In S2, the connected tail gas treatment device contains an alcohol solution, which absorbs the organic byproducts produced during the regeneration process, and the generated carbon dioxide can be directly discharged into the atmosphere;

[0031] In S2, the magnetron is a multi-mode microwave reactor, the inner box is its resonant cavity, the frequency is 2450MHz, and the power is adjusted and timed by the control system in the range of 500-2000W;

[0032] Heating and drying can be performed under low power conditions, and activated carbon can be regenerated under high power conditions.

[0033] Preferably, in S3, the regeneration temperature in the high power state is 500-600° C., the regeneration environment is an oxygen-free or oxygen-deficient environment, and the regeneration time is 2-5 minutes.

[0034] Compared with the prior art, the present invention has the following beneficial technical effects:

[0035] 1. The present invention provides an ultrasonic-microwave combined regeneration device for waste activated carbon. The overall device has a simple structure and can be miniaturized. Compared with traditional thermal regeneration, it can efficiently complete the regeneration of waste activated carbon in a short time, not only can the waste activated carbon be regenerated and reused, but also can further reduce the energy consumption in the process of regenerating activated carbon; compared with microwave regeneration and ultrasonic regeneration, the regeneration effect is better and is more suitable for multiple cycle regeneration.

[0036] 2. The present invention provides a microwave regeneration method using ultrasonic pretreatment. First, the cavitation effect of low-frequency ultrasonic waves is used to weaken or destroy the bond energy between activated carbon and adsorbate in a short time, so as to assist the microwave regeneration of activated carbon and achieve better regeneration effect. The cleaning pretreatment time is controlled within 2 minutes without destroying the porous structure of activated carbon, which can improve the recovery rate of activated carbon and reduce the loss rate of activated carbon. At the same time, the good wave absorption performance of the porous structure of activated carbon is used to absorb microwave radiation energy, so that the activated carbon can be quickly heated to make up for the long heat conduction process from outside to inside required by traditional thermal regeneration, which can reduce energy consumption, and the micropore recovery rate of the regenerated carbon is high, and the recovery effect is better. The general regeneration rate exceeds 95%, and the regeneration rate can be maintained above 90% after multiple cycles of regeneration, and the regeneration energy consumption is extremely low. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic diagram of a regeneration system according to an embodiment of the present invention;

[0038] Figure 2 2 is a schematic diagram of the box structure of an embodiment of the present invention;

[0039] Figure 3 is a cross-sectional view of a box body according to an embodiment of the present invention;

[0040] Figure 4 is a schematic diagram of a regeneration barrel according to an embodiment of the present invention;

[0041] Figure 5 is a top view of a regeneration barrel according to an embodiment of the present invention;

[0042] Figure 6 It is a comparison chart of the regeneration rates after 5 cycles of the embodiments of the present invention.

[0043] Figure numerals: 1. air intake pipe; 2. box body; 3. glass observation window; 4. sealing lock; 5. universal wheel; 6. control system; 7. connecting pipe; 8. tray; 9. regeneration barrel; 10. dust cover; 11. magnetron; 12. insulation layer; 13. rotating shaft; 14. motor; 15. ultrasonic generator; 16. foot; 17. water tank; 18. high temperature resistant filter membrane. DETAILED DESCRIPTION

[0044] Example 1

[0045] like Figure 1-2 As shown, the ultrasonic-microwave combined regeneration device for waste activated carbon proposed by the present invention comprises a box body 2, a regeneration barrel 9 and a tray 8 arranged in the box body 2, and the box body 2 comprises an external shell, a box door and an internal resonant cavity;

[0046] The door is opened outward in one direction, a glass observation window 3 is arranged in the middle of the door, a hinge connected to the box body 2 is arranged on one side of the door, and a handle and a sealing lock 4 are arranged on the other side;

[0047] A heat-insulating layer 12 is filled between the shell and the resonant cavity; a heat-insulating layer 12 of the same type is filled in the interlayer of the door;

[0048] An air intake pipe 1 is arranged on the top of the box body 2, and a connecting pipe 7 is arranged on the bottom of the box body 2; both the air intake pipe 1 and the connecting pipe 7 are inserted into the resonance cavity;

[0049] A motor 14 is arranged inside the box 2, and a rotating shaft 13 is arranged at the output end of the motor 14. The rotating shaft 13 is connected to the tray 8. A sleeve is arranged along the outer circumference of the rotating shaft 13. The top of the sleeve contacts the tray 8, and the bottom contacts the inner wall of the box 2. The sleeve supports the tray 8 and positions the rotating shaft 13, thereby reducing radial vibration of the rotating shaft 13 during operation.

[0050] A plurality of feet 16 are provided at the bottom of the regeneration barrel 9, and the regeneration barrel 9 is placed on the tray 8; the motor drives the rotating shaft 13 to rotate, driving the tray 8 and the regeneration barrel 9 to rotate; a plurality of water tanks 17 are reserved at the bottom of the regeneration barrel 9; a high temperature resistant filter membrane 18 is laid at the bottom of the regeneration barrel 9;

[0051] An ultrasonic generator 15 and a magnetron 11 are respectively arranged along the outer shell of the resonant cavity; the ultrasonic generator 15 is located at the bottom of the resonant cavity, and the magnetron 11 is distributed in a ring array along the outer circumference of the resonant cavity;

[0052] The box 2 is integrated with a control system 6, which is electrically connected to the magnetron 11, the motor 14 and the ultrasonic generator 15; the control system 6 controls the power of the magnetron 11, the motor 14 and the ultrasonic generator 15 and sets the timing;

[0053] Four universal wheels 5 are installed at the bottom of the box 2 for convenient movement of the box 2; the control system 6 connects and controls the magnetron 11, the rotating motor 14 and the ultrasonic generator 15, including a cleaning switch, a rotating heating switch, a timer, a power regulator, etc.; the tray 8 is connected to the rotating shaft 13, and the rotating shaft 13 passes through the inner box, the insulation layer, and the metal bottom and is connected to the lower rotating motor 14, which can support and fix the regeneration barrel 9 and drive it to rotate synchronously after starting the heating; the insulation layer 12 is filled between the metal box shell and the inner box of the resonant cavity, as well as in the metal box door interlayer, and reserves the required positions for the magnetron 11, the rotating motor 14, and the ultrasonic generator 15.

[0054] Among them, the regeneration barrel 9 can be taken out from the box 2, which is convenient for filling and collecting finished products. The ultrasonic generator 15 generates ultrasonic waves to clean the waste activated carbon in the box to improve the regeneration rate of activated carbon. The magnetron 11 generates microwaves to quickly heat the waste activated carbon, thereby achieving the purpose of drying and regeneration. For various materials inside the box 2, wave-transmitting materials are used to reduce the absorption and influence of microwaves, ensuring that only the waste activated carbon in the box absorbs microwaves, reducing energy loss; the control system 6 is used to set the time and adjust the power, heating and drying in low power state, and heating and regeneration in high power state; at the same time, the device of the present invention adopts the method of introducing inert gas to ensure that an oxygen-free or anoxic environment is maintained during the regeneration process, thereby improving the yield of regenerated carbon.

[0055] Example 2

[0056] An ultrasonic-microwave combined regeneration device for waste activated carbon, which is different from Example 1 in that an air intake pipe 1 is installed through a box body 2 and one side of the upper part of a thermal insulation layer 11, and is connected to the top of an inner box body 2. A valve and a pipeline connection device are provided on the outer part of the box body 2, which can be connected to a nitrogen bottle. A connecting pipe 7 is installed through a box body 2 and the opposite side of the lower part of a thermal insulation layer 12, connected to the side of the inner box body and flush with the bottom, so as to facilitate the drainage of waste water in the box. A valve and a pipeline connection device are also provided on the outside of the box body 2, which can be connected to a pipeline for tail gas collection and treatment. In the ultrasonic cleaning pretreatment stage, the pipeline can be connected to water intake and drainage. A dust cover 10 is also provided inside the box body to prevent clogging of activated carbon powder.

[0057] The metal box shell and the metal box door of the box body 2 play the role of microwave shielding to prevent microwave radiation leakage from causing harm to the human body; the glass observation window 3 is installed on the box door, and the glass observation window 3 faces the regeneration barrel 9, so as to directly observe the state change of the activated carbon during the activated carbon regeneration process, and an infrared thermometer can be used for temperature measurement; the thermal insulation layer 12 is filled between the metal box shell and the box body in the resonant cavity, as well as in the metal box door interlayer, so as to further reduce the heat loss during the heating process and further save energy;

[0058] Three supporting feet 15 are provided at the bottom of the regeneration barrel 9 for support and fixation, and a certain number of water tanks 17 are provided in the center to drain the cleaning liquid, and the high temperature resistant filter membrane 18 is used to prevent leakage of the activated carbon. A 30-40mm gap is left around the regeneration barrel 9 and the inner box body 2 and the box door for the circulation of nitrogen and cleaning liquid, which can be used to maintain an anaerobic or anoxic environment and improve the yield of the regenerated carbon. After cooling, the regeneration barrel is taken out to facilitate the collection of the regenerated carbon.

[0059] Example 3

[0060] The present invention also provides a method for ultrasonic-microwave combined regeneration of waste activated carbon, comprising the following steps:

[0061] S1. Lay a high temperature resistant filter membrane 18 at the bottom of the regeneration barrel 9, fill the waste activated carbon into the regeneration barrel 9, close the box door and seal the lock, open the water inlet pipe to fill it with water and close the valve, turn on the ultrasonic generator 15 to perform ultrasonic cleaning pretreatment on the waste activated carbon, and then open the drain pipe valve to drain the waste water in the box;

[0062] S2, leaving the cleaned waste activated carbon in the regeneration barrel 9, connecting the air inlet pipe 1 to the nitrogen bottle, opening the air outlet pipe to connect the pipeline for tail gas collection and treatment, opening the valve to introduce nitrogen to remove the air in the box, and the control system 6 controls the magnetron 11 to generate microwave radiation at low power to heat and dry the waste activated carbon;

[0063] S3. Set the regeneration time and power according to the percentage of the waste activated carbon to be regenerated in the regeneration barrel 9 capacity, ensure that the microwave regeneration process is in an oxygen-free or oxygen-deficient environment, and observe and measure the temperature through the observation window installed on the door during the regeneration process;

[0064] S4. Maintain an oxygen-free or anoxic environment, and cool the solid to obtain regenerated carbon after regeneration is completed.

[0065] In S1, during ultrasonic cleaning of the waste activated carbon, the cleaning liquid is water;

[0066] The ultrasonic generator 15 uses 40kHz low-frequency ultrasonic waves to clean and pre-treat the waste activated carbon, and the cleaning time does not exceed 2 minutes.

[0067] In S2, the washed waste activated carbon is dried by a low-power microwave drying method; the waste activated carbon is dehydrated and dried at a temperature of 105-110° C. for 5 minutes;

[0068] In S2, the connected tail gas treatment device contains an alcohol solution, which absorbs the organic byproducts produced during the regeneration process, and the generated carbon dioxide can be directly discharged into the atmosphere;

[0069] In S2, the magnetron 11 is a multi-mode microwave reactor, the inner box is its resonant cavity, the frequency is 2450MHz, and the power is adjusted and timed in the range of 500-2000W by the control system;

[0070] Heating and drying can be performed under low power conditions, and activated carbon can be regenerated under high power conditions.

[0071] In S3, the regeneration temperature is 500-600°C under high power state, the regeneration environment is oxygen-free or oxygen-deficient environment, and the regeneration time is 2-5 minutes;

[0072] The working process of the above embodiment is as follows: a high temperature resistant filter membrane is laid on the bottom of the regeneration barrel, the waste activated carbon is filled into the quartz regeneration barrel 9, and then the box door is closed and locked tightly 4. At this time, a gap of 30-40mm is left around the regeneration barrel and the inner box body and the box door; the upper air inlet 1 is opened to let water in from the water inlet 7 until the water fills the inner box body, and water is used as a cleaning agent to reduce the cleaning cost; after closing the valve, the ultrasonic generator 15 is turned on to perform 40kHz low-frequency ultrasonic cleaning pretreatment for 1-2min, the drain port 7 valve is opened to drain the water in the box and then the valve is closed; the air inlet 1 is connected to the nitrogen bottle, the air outlet 7 is connected to the pipeline to pass the alcohol solution, and the valve is opened to drain the air in the box to keep it oxygen-free Environment; turn on the rotary heating switch, the waste activated carbon to be regenerated accounts for 50% of the capacity of the regeneration barrel 9; use the control system 6 to adjust the power to 500W and time 5min for microwave heating and drying, observe through the glass observation window 3 during the drying process and perform infrared temperature measurement to ensure that the drying temperature is 105-110°C; after drying, use the control system 6 to time for 2min and adjust the power to 1000W, observe through the glass observation window 3 during the regeneration process and perform infrared temperature measurement to ensure that the regeneration temperature is 500-600°C; after the timing ends, continue to keep the gas flowing until the activated carbon cools, open the sealing lock 4, take out the quartz regeneration barrel 9 and collect the regenerated carbon. The waste activated carbon to be regenerated accounts for 100% of the capacity of the regeneration barrel 9, then adjust the microwave heating and drying power to 1000W, the regeneration process is timed for 5min, and the power is 2000W.

[0073] On the one hand, the present invention provides a microwave regeneration device for waste activated carbon with a simple structure and miniaturization; on the other hand, it provides a microwave regeneration method using ultrasonic pretreatment, firstly, the cavitation effect of low-frequency ultrasonic waves is used to weaken or destroy the bond energy between activated carbon and adsorbate in a short time, so as to assist the microwave regeneration of activated carbon and achieve better regeneration effect, and the cleaning pretreatment time is controlled within 2 minutes without destroying the porous structure of the activated carbon, thereby improving the recovery rate of the activated carbon and reducing the loss rate of the activated carbon; at the same time, the good wave absorption performance of the porous structure of the activated carbon is used to absorb microwave radiation energy, so that the activated carbon can be quickly heated up to make up for the long heat conduction process from the outside to the inside required for traditional thermal regeneration, which can reduce energy consumption and obtain a high micropore recovery rate of the regenerated carbon, and to a certain extent, it can even further increase the adsorption amount of the regenerated carbon.

[0074] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A method for regenerating waste activated carbon by ultrasonic-microwave combined regeneration, using a device for regeneration; the device comprises a box, a regeneration barrel and a tray arranged in the box, characterized in that: The box body includes an external shell, a door and an internal resonant cavity; The door opens outward in one direction, a glass observation window is arranged in the middle of the door, a hinge connected to the box body is arranged on one side of the door, and a handle and a sealing lock are arranged on the other side; The insulation layer is filled between the shell and the resonant cavity; the insulation layer of the same type is filled in the interlayer of the door; An air inlet pipe is arranged on the top of the box, and a connecting pipe is arranged on the bottom of the box; both the air inlet pipe and the connecting pipe are inserted into the resonance cavity; a four-way is installed on the connecting pipe, which is respectively connected to the water inlet pipe, the drainage pipe and the air outlet pipe; solenoid valves for controlling opening and closing are arranged on the water inlet pipe, the drainage pipe and the air outlet pipe; the control system controls the opening and closing of the solenoid valves; A motor is arranged inside the box, a rotating shaft is arranged at the output end of the motor, the rotating shaft is connected to the tray, and a sleeve is arranged along the outer circumference of the rotating shaft; A plurality of feet are arranged at the bottom of the regeneration barrel, and the regeneration barrel is placed on a tray; a motor drives the rotating shaft to rotate, driving the tray and the regeneration barrel to rotate; a plurality of water tanks are reserved at the bottom of the regeneration barrel; a high temperature resistant filter membrane is laid at the bottom of the regeneration barrel; Ultrasonic generators and magnetrons are arranged along the outer shell of the resonant cavity; the ultrasonic generator is located at the bottom of the resonant cavity, and the magnetrons are distributed in a ring array along the outer circumference of the resonant cavity; The box is integrated with a control system, which is electrically connected to the magnetron, motor and ultrasonic generator; the control system controls the power of the magnetron, motor and ultrasonic generator and sets the timing; The regeneration method comprises: S1. Lay a high temperature resistant filter membrane at the bottom of the regeneration barrel, fill the waste activated carbon into the quartz regeneration barrel, close the box door and seal the lock, open the water inlet pipe, fill it with water and close the valve, turn on the ultrasonic generator to perform ultrasonic cleaning pretreatment on the waste activated carbon, and then open the drain pipe valve to drain the waste water in the box; S2. Leave the cleaned waste activated carbon in the regeneration barrel, connect the air inlet pipe to the nitrogen bottle, open the air outlet pipe to connect the pipeline for tail gas collection and treatment, open the valve to introduce nitrogen to exhaust the air in the box, and control the magnetron to generate microwave radiation at low power to heat and dry the waste activated carbon; The low-power microwave drying method is used to dry the cleaned waste activated carbon; the waste activated carbon is dehydrated and dried at a temperature of 105-110°C for 5 minutes; the connected tail gas treatment device contains an alcohol solution, which absorbs the organic by-products generated during the regeneration process, and the generated carbon dioxide can be directly discharged into the atmosphere; the magnetron is a multi-mode microwave reactor, the inner box is its resonant cavity, the frequency is 2450MHz, and the power is adjusted and timed in the range of 500-2000W through the control system; heating and drying can be carried out in a low-power state, and activated carbon can be regenerated in a high-power state; the regeneration temperature in the high-power state is 500-600°C, the regeneration environment is an anaerobic or anoxic environment, and the regeneration time is 2-5 minutes; S3. Set the regeneration time and power according to the percentage of the waste activated carbon to be regenerated in the regeneration barrel capacity to ensure that the microwave regeneration process is in an oxygen-free or anoxic environment. During the regeneration process, observe and measure the temperature through the observation window installed on the door; S4. Maintain an oxygen-free or anoxic environment, and cool the solid to obtain regenerated carbon after regeneration is completed.

2. The method for regenerating waste activated carbon by ultrasonic-microwave combined regeneration according to claim 1, characterized in that: A plurality of universal wheels are arranged at the bottom of the box body for easy movement.

3. The method for regenerating waste activated carbon by ultrasonic-microwave combined regeneration according to claim 1, characterized in that: Dust covers are provided on the sides of the air inlet pipe and the connecting pipe inserted into the resonance cavity.

4. The method for regenerating waste activated carbon by ultrasonic-microwave combined regeneration according to claim 1, characterized in that: The insulation layer is pre-cut to reserve installation positions for the magnetron, rotating motor, and ultrasonic generator.

5. The method for regenerating waste activated carbon by ultrasonic-microwave combined regeneration according to claim 1, characterized in that: There is a 30-40mm gap between the regeneration barrel and the inner wall of the resonance cavity and the inner wall of the box door to form a flow channel for nitrogen or cleaning liquid.

6. The method for regenerating waste activated carbon by ultrasonic-microwave combined regeneration according to claim 1, characterized in that: In S1, during ultrasonic cleaning of the waste activated carbon, the cleaning liquid is water, a water-based cleaning agent or a solvent-based cleaning agent; The ultrasonic generator uses 40 kHz low-frequency ultrasonic waves to clean and pre-treat the waste activated carbon, and the cleaning time does not exceed 2 minutes.

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