Continuous activated carbon new preparation and regeneration system

Abstract

The invention relates to the technical field of activated carbon preparation and regeneration, and provides a continuous activated carbon new preparation and regeneration system which comprises a pretreatment unit, a microwave regeneration unit, a cooling unit and a screening and packaging unit. According to the continuous activated carbon new preparation and regeneration system provided by the invention, the activated carbon is heated by microwaves, and heat is generated by material internal friction caused by polar molecule movement and forced oscillation, so that the heat transfer bottleneck of conduction, convection and radiation which must be faced by traditional heating is avoided, and the waste activated carbon is uniformly and simultaneously heated integrally; the regeneration quality of the waste activated carbon is effectively guaranteed. Meanwhile, materials adsorbed by the activated carbon can be quickly desorbed and cracked from the inside in a bumping form through microwave heating, the performance recovery rate is high, and the performance recovery rate of the activated carbon in five regeneration cycles is greater than 90%.

Description

Technical Field

[0001] The invention relates to the technical field of activated carbon preparation and regeneration, and in particular to a continuous activated carbon preparation and regeneration system. Background Art

[0002] Activated carbon is a general term for carbon-containing substances made by various processes that can promote adsorption performance. Activated carbon regeneration (or activation) refers to the use of physical or chemical methods to remove the adsorbate adsorbed in the micropores of activated carbon without destroying the original structure of the activated carbon, thereby restoring its adsorption performance and achieving the purpose of repeated use. Since the price of activated carbon itself is relatively high, it is extremely uneconomical to discard it after only using it once, resulting in waste of resources and increased costs. How to efficiently regenerate adsorption saturated activated carbon to achieve economic and rational use has become a key issue that must be addressed in the activated carbon industry, and it is also a hot spot for research and development at home and abroad.

[0003] At present, there are many kinds of activated carbon regeneration processes based on different types and uses, including thermal regeneration, solvent regeneration, oxidation regeneration, biological regeneration, electrochemical regeneration, etc. Among them, thermal regeneration is the most widely used and most mature activated carbon regeneration method in industry. The advantage of thermal regeneration is that it can decompose a variety of substances during the regeneration process, with a high regeneration rate, short regeneration time, and basically no selectivity for adsorbents, thus becoming the main regeneration method. Commonly used thermal regeneration methods include: multi-layer activation furnace, fluidized bed activation furnace and rotary activation furnace, etc., but the traditional thermal regeneration method has large regeneration losses and cannot guarantee the regeneration quality of waste activated carbon. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is that the traditional thermal regeneration method in the prior art has large regeneration losses and cannot guarantee the regeneration quality of waste activated carbon, thereby providing a continuous activated carbon preparation and regeneration system.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] The present invention provides a continuous activated carbon preparation and regeneration system, comprising: a pretreatment unit, used for unpacking and sorting activated carbon; a microwave regeneration unit, the inlet of the microwave regeneration unit is connected to the outlet of the pretreatment unit, and microwave heating is used to make the adsorbate of the activated carbon boil violently, so as to achieve desorption and cracking of the adsorbate; a cooling unit, the inlet of the cooling unit is connected to the outlet of the microwave regeneration unit, and is used for cooling the activated carbon; a screening and packaging unit, the inlet of the screening and packaging unit is connected to the outlet of the cooling unit, and is used for screening and packaging the activated carbon after cooling.

[0007] Furthermore, the pretreatment unit includes a semi-automatic ton bag unpacking machine, a circular vibrating screen, a closed skirt-type belt conveyor, an eddy current separator and a raw material temporary storage bin; the outlet of the semi-automatic ton bag unpacking machine is connected to the feed port of the circular vibrating screen, and the discharge port of the circular vibrating screen and the inlet of the eddy current separator are connected through the closed skirt-type belt conveyor; the outlet of the eddy current separator is connected to a tube chain machine, and the sorted materials are transported to the raw material temporary storage bin, and the raw material temporary storage bin is connected to the inlet of the microwave regeneration unit through the tube chain machine.

[0008] Furthermore, the microwave regeneration unit includes a feed box, a feed screw conveyor, a microwave rotating bed and a discharge screw conveyor; the inlet of the feed box is connected to the outlet of the eddy current separator, the outlet of the feed box is connected to the inlet of the microwave rotating bed through the feed screw conveyor, and the outlet of the microwave rotating bed is connected to the inlet of the cooling unit through the discharge screw conveyor.

[0009] Furthermore, the continuous activated carbon preparation and regeneration system also includes a tube bundle dryer and a drying temporary storage silo; the inlet of the tube bundle dryer is connected to the outlet of the raw material temporary storage silo, the outlet of the tube bundle dryer is connected to a tube chain machine, the other end of the tube chain machine is connected to the inlet of the drying temporary storage silo, and the outlet of the drying temporary storage silo is connected to the inlet of the feed box through the tube chain machine.

[0010] Furthermore, the cooling unit is a multi-tube cooler, the outlet of the discharging screw conveyor is connected to the inlet of the multi-tube cooler, and the outlet of the multi-tube cooler is connected to the inlet of the screening and packaging unit through a tube chain machine.

[0011] Furthermore, the continuous activated carbon preparation and regeneration system also includes a finished product temporary storage silo, the inlet of the finished product temporary storage silo is connected to the outlet of the multi-tube cooler through a tube chain machine, and the outlet of the finished product temporary storage silo is connected to the inlet of the screening and packaging unit through a tube chain machine.

[0012] Furthermore, the screening and packaging unit includes a closed linear vibrating screen, a first ton bag packaging machine and a second ton bag packaging machine; the outlet of the finished product temporary storage bin is connected to the inlet of the closed linear vibrating screen through a tube chain machine, the first outlet of the closed linear vibrating screen is connected to the inlet of the first ton bag packaging machine through a tube chain machine; the second outlet of the closed linear vibrating screen is connected to the inlet of the second ton bag packaging machine through a tube chain machine.

[0013] Furthermore, the continuous activated carbon preparation and regeneration system also includes a flue gas treatment unit, which includes a mixing box, a water washing tower, a dry filter, an incinerator, a cooling tower, an alkali washing tower, an activated carbon adsorption box and a chimney connected in sequence; the flue gas outlets of the semi-automatic ton bag unpacking machine and the eddy current separator are both connected to the inlet of the mixing box; a moist hot flue gas condenser is provided at the flue gas outlet of the tube bundle dryer, and the outlet of the moist hot flue gas condenser is connected to the inlet of the mixing box; the flue gas outlets of the closed linear vibrating screen, the first ton bag packaging machine and the second ton bag packaging machine are all connected to the inlet of the mixing box.

[0014] Furthermore, the flue gas treatment unit also includes a connected gas-to-gas heat exchanger and a gas-to-liquid heat exchanger; the outlet of the gas-to-liquid heat exchanger is connected to the inlet of the air mixing box; a gravity settling chamber is provided at the flue gas outlet of the microwave rotating bed, and the flue gas outlet of the gravity settling chamber is connected to the inlet of the gas-to-gas heat exchanger through a pipeline.

[0015] Furthermore, the continuous activated carbon preparation and regeneration system also includes a closed-loop cooling tower, a nitrogen generator, a steam boiler and a dust collector; the hot water inlet of the closed-loop cooling tower is connected to the cooling water return main of the moist flue gas condenser, the gas-liquid heat exchanger, the multi-tube cooler and the microwave rotating bed, and the outlet of the closed-loop cooling tower is connected to the cooling water inlet main of the moist flue gas condenser, the gas-liquid heat exchanger, the multi-tube cooler and the microwave rotating bed; the nitrogen outlet of the nitrogen generator is connected to the nitrogen injection port of the microwave rotating bed; the dust collector is provided at the flue gas outlet of the eddy current separator, the tube bundle dryer, the closed linear vibrating screen, the first ton bag packaging machine and the second ton bag packaging machine; the steam generated by the steam boiler is connected to the steam inlet of the tube bundle dryer through a part of the steam pipeline for drying the raw materials; the other part is connected to the steam inlet of the stirring device on the microwave rotating bed for the newly prepared activated carbon as an activator.

[0016] The technical solution of the present invention has the following advantages:

[0017] The continuous activated carbon preparation and regeneration system provided by the present invention adopts microwave heating of activated carbon, and utilizes the internal friction of materials caused by polar molecular motion and forced oscillation to generate heat, thereby bypassing the heat transfer bottleneck of "conduction, convection, and radiation" that must be faced by traditional heating, and achieving uniform and simultaneous heating of the waste activated carbon as a whole, effectively ensuring the quality of waste activated carbon regeneration. At the same time, microwave heating can make the materials adsorbed by the activated carbon quickly desorb and crack from the inside in the form of violent boiling, reducing the problem of carbonization cracking blocking pores due to too long residence time, and the performance recovery rate is high. The performance recovery rate of activated carbon within five regeneration cycles is greater than 90%. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 Schematic diagram of a continuous activated carbon preparation and regeneration system in an embodiment of the present invention;

[0020] Figure 2 Schematic diagram of a microwave generating unit in a continuous activated carbon preparation and regeneration system in an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1. Electric hoist; 2. Semi-automatic ton bag unpacking machine; 3. Closed skirt belt conveyor; 4. Eddy current separator; 5. Filter cartridge dust collector; 6. Tube bundle dryer; 7. Cyclone dust collector; 8. Moist flue gas condenser; 9. Drying temporary storage silo; 10. Microwave regeneration unit; 11. Gravity sedimentation chamber; 12. Multi-tube cooler; 13. Tube chain conveyor; 14. Finished product temporary storage silo; 15. Closed linear vibrating screen; 16. First ton Bag packaging machine; 17. Second ton bag packaging machine; 18. Closed cycle cooling tower auxiliary machine; 19. Closed cycle cooling tower; 20. Induced draft fan; 21. Air-to-air heat exchanger; 22. Air-liquid heat exchanger; 23. Mixing air box; 24. Water washing tower; 25. Dry filter; 26. Incinerator; 27. Cooling tower; 28. Alkali washing tower; 29. ​​Activated carbon adsorption box; 30. Chimney; 31. Circular vibrating screen; 32. Raw material temporary storage warehouse; 33. Control room;

[0023] 101. Feed box; 102. Feed screw conveyor; 103. Discharge screw conveyor; 104. Microwave rotating bed; 105. Stirring device. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] like Figure 1 As shown, the present embodiment provides a continuous activated carbon preparation and regeneration system, including: a pretreatment unit, used for unpacking and sorting the activated carbon; a microwave regeneration unit 10, the inlet of the microwave regeneration unit 10 is connected to the outlet of the pretreatment unit, and microwave heating is used to make the adsorbate of the activated carbon boil violently to achieve desorption and cracking of the adsorbate; a cooling unit, the inlet of the cooling unit is connected to the outlet of the microwave regeneration unit 10, and is used to cool the activated carbon; a screening and packaging unit, the inlet of the screening and packaging unit is connected to the outlet of the cooling unit, and is used to screen and package the activated carbon after cooling.

[0029] The continuous activated carbon preparation and regeneration system provided in this embodiment uses microwaves to heat activated carbon, and utilizes the internal friction of materials caused by polar molecular motion and forced oscillation to generate heat, thereby bypassing the heat transfer bottleneck of "conduction, convection, and radiation" that traditional heating must face, and achieving uniform and simultaneous heating of the waste activated carbon as a whole, effectively ensuring the quality of waste activated carbon regeneration. At the same time, microwave heating can make the materials adsorbed by the activated carbon quickly desorb from the inside in the form of violent boiling, reducing the problem of carbonization cracking and pore clogging caused by too long a residence time, and the performance recovery rate is high, and the performance recovery rate of activated carbon within five regeneration cycles is greater than 90%. Among them, the pretreatment unit includes a semi-automatic ton bag unpacking machine 2, a circular vibrating screen 31, a closed skirt-type belt conveyor 3, an eddy current separator 4 and a raw material temporary storage bin 32; the outlet of the semi-automatic ton bag unpacking machine 2 is connected to the feed port of the circular vibrating screen 31, and the circular vibrating screen 31 and the inlet of the eddy current separator 4 are connected through the closed skirt-type belt conveyor 3; the outlet of the eddy current separator 4 is connected to the inlet of the raw material temporary storage bin 32 through a tube chain machine, the raw material temporary storage bin 32 is connected to the feed port of the tube bundle dryer 6 through the tube chain machine, the outlet of the tube bundle dryer is connected to the inlet of the drying temporary storage bin through the tube chain machine, and the drying temporary storage bin is connected to the inlet of the microwave regeneration unit 10 through the tube chain machine.

[0030] like Figure 2 As shown, the microwave regeneration unit 10 includes a feed box 101, a feed screw conveyor 102, a microwave rotating bed 104, a discharge screw conveyor 103, and a stirring device; the inlet of the feed box 101 is connected to the outlet of the temporary storage bin of the dried materials through a pipe chain machine, the outlet of the feed box 101 is connected to the inlet of the microwave rotating bed 104 through the feed screw conveyor 102, and the outlet of the microwave rotating bed 104 is connected to the inlet of the cooling unit through the discharge screw conveyor 103; a stirring device 105 is provided in the microwave rotating bed 104 for stirring the material, wherein the microwave rotating bed 104 can be used for activated carbon regeneration and new activated carbon. When the activated carbon is newly made, water vapor can be introduced into the material inside the microwave rotating bed 104 for activation, and the water vapor is introduced from the stirring device 105. Among them, the continuous activated carbon preparation and regeneration system also includes a tube bundle dryer 6 and a drying temporary storage silo 9; the inlet of the tube bundle dryer 6 is connected to the outlet of the raw material temporary storage silo, the outlet of the tube bundle dryer 6 is connected to the inlet of the drying temporary storage silo 9, and the outlet of the drying temporary storage silo 9 is connected to the inlet of the feed box 101.

[0031] Among them, the cooling unit is a multi-tube cooler 12, the outlet of the discharging screw conveyor 103 is connected to the inlet of the multi-tube cooler 12, the outlet of the multi-tube cooler 12 is connected to the inlet of the finished product temporary storage silo through a tube chain machine, and the finished product temporary storage silo is connected to the inlet of the screening and packaging unit through the tube chain machine.

[0032] Among them, the screening and packaging unit includes a closed linear vibrating screen 15, a first ton bag packaging machine 16 and a second ton bag packaging machine 17; the outlet of the finished product temporary storage bin 14 is connected to the inlet of the closed linear vibrating screen 15 through a tube chain machine, the first outlet of the closed linear vibrating screen 15 is connected to the inlet of the first ton bag packaging machine 16 through a tube chain machine; the second outlet of the closed linear vibrating screen 15 is connected to the inlet of the second ton bag packaging machine 17 through a tube chain machine.

[0033] Among them, the continuous activated carbon preparation and regeneration system also includes a flue gas treatment unit, which includes a mixing box 23, a water washing tower 24, a dry filter 25, an incinerator, a cooling tower 27, an alkali washing tower 28, an activated carbon adsorption box 29 and a chimney 30 connected in sequence; the flue gas outlets of the semi-automatic ton bag unpacking machine 2 and the eddy current separator 4 are both connected to the inlet of the mixing box 23; a moist hot flue gas condenser 8 is provided at the flue gas outlet of the tube bundle dryer 6, and the outlet of the moist hot flue gas condenser 8 is connected to the inlet of the mixing box 23; the flue gas outlets of the closed linear vibrating screen 15, the first ton bag packaging machine 16 and the second ton bag packaging machine 17 are all connected to the inlet of the mixing box 23.

[0034] Among them, the flue gas treatment unit also includes a connected gas-to-gas heat exchanger 21 and a gas-to-liquid heat exchanger 22; the outlet of the gas-to-liquid heat exchanger 22 is connected to the inlet of the air mixing box 23; a gravity settling chamber 11 is provided at the flue gas outlet of the microwave rotating bed 104, and the flue gas outlet of the gravity settling chamber 11 is connected to the inlet of the gas-to-gas heat exchanger 21.

[0035] The continuous activated carbon preparation and regeneration system further comprises a closed-loop cooling tower 19, a nitrogen generator, a steam boiler and a dust collector; the hot water inlet of the closed-loop cooling tower 19 is connected to the cooling water return main of the moist hot flue gas condenser 8, the gas-liquid heat exchanger 22, the multi-tube cooler 12 and the microwave rotating bed 104, and the outlet of the closed-loop cooling tower 19 is connected to the cooling water inlet main of the moist hot flue gas condenser 8, the gas-liquid heat exchanger 22, the multi-tube cooler 12 and the microwave rotating bed 104; the nitrogen outlet of the nitrogen generator is connected to the nitrogen injection port of the microwave rotating bed 104 ; Dust collectors are provided at the flue gas outlets of the eddy current separator 4, the closed linear vibrating screen 15, the first ton bag packaging machine 16 and the second ton bag packaging machine 17; for example, a cartridge dust collector 5 can be provided at the flue gas outlet of the eddy current separator 4; for example, a cyclone dust collector 7 and a cartridge dust collector 5 can be provided at the flue gas outlets of the closed linear vibrating screen 15, the first ton bag packaging machine 16 and the second ton bag packaging machine 17, and the cyclone dust collector 7 and the cartridge dust collector 5 are arranged in series front and back, wherein the cyclone dust collector 7 is used for primary dust removal, and the cartridge dust collector 5 is used for secondary dust removal. The steam generated by the steam boiler is connected to the steam inlet of the tube bundle dryer through a part of the steam pipeline for drying the raw materials; the other part is connected to the steam inlet of the stirring device fixedly installed on the microwave rotary bed, and is used for the newly prepared activated carbon as an activator. Specifically, the semi-automatic ton bag unpacking machine 2 can be a conventional unpacking machine, which is composed of an unpacking machine box, a hanger, a guide rail, an electric hoist 1, a manual operation table, an observation window, a bag beating device, a door opening mechanism, a filter cartridge dust collector, and a transition silo, and is used to unpack ton bag packaging materials. Among them, the unloading port of the transition silo can be provided with a valve to connect with the inlet of the circular vibrating screen 31, the circular straight screen outlet is connected with the inlet of the closed skirt belt conveyor 3, and the outlet of the closed skirt belt conveyor 3 is connected with the upper inlet of the eddy current separator 4. The outlet of the eddy current separator 4 can be linked to the upper inlet of the raw material temporary storage bin 32, and the lower outlet of the raw material temporary storage bin 32 can be connected to the screw conveyor inlet of the tube bundle dryer for feeding and the top inlet of the drying temporary storage bin 9 through the tube chain conveyor 13 respectively. The outlet of the tube bundle dryer conveys the dried material to the drying temporary storage bin 9 through the tube chain conveyor 13, and the outlet of the drying temporary storage bin 9 can be connected to the top entrance of the feed box 101 of the microwave rotating bed 104 through the tube chain conveyor 13. The outlet of the feed box 101 of the microwave rotating bed 104 is connected to the entrance of the feed screw conveyor 102, and the outlet of the discharge screw conveyor 103 is connected to the entrance of the multi-tube cooler 12. The outlet of the multi-tube cooler 12 and the top entrance of the finished product temporary storage bin 14 can be connected through the tube chain conveyor 13.The outlet of the finished product temporary storage silo 14 is connected to the top inlet of the first ton bag packaging machine 16 and the upper inlet of the closed linear vibrating screen 15 through a tube chain conveyor 13, and the outlet of the closed linear vibrating screen 15 can be connected to the top inlet of the first ton bag packaging machine 16 and the top inlet of the second ton bag packaging machine 17 through two tube chain conveyors 13.

[0036] Among them, a sensor can be set on the upper door opening mechanism of the semi-automatic ton bag unpacking machine 2 to realize the automatic opening and closing of the warehouse door when the ton bag of activated carbon is hoisted into place; workers can manually unpack the ton bags through the manual operating table and observation window; the bag-beating device beats the bottom of the ton bag through the hydraulic mechanism to realize the smooth unloading of the activated carbon.

[0037] Among them, the circular vibrating screen 31 is arranged at the lower part of the transition silo of the semi-automatic ton bag unpacking machine 2. The circular vibrating screen 31 can be composed of a box body, a screen, a high-frequency vibration motor, a shock-absorbing spring, a frame base and other structures. It is provided with an upper feed port, a lower discharge port and a side slag discharge port. The large impurities in the activated carbon are removed by the high-frequency vibration of the screen. The material screened by the circular vibrating screen 31 is transported to the entrance of the eddy current separator 4 by a closed skirt conveyor.

[0038] Among them, the closed skirt belt conveyor 3 can be composed of a conveyor belt, a transmission device, a supporting device, a guiding device and other structures. Compared with the traditional belt, the conveyor belt has a skirt and a small hopper, which are used to load and fix the conveyed materials to prevent the materials from scattering. The conveyor conveying angle can be set in the range of 30°-45° to ensure the stability of the chain during the conveying process. The conveyor belt and the silo can be made of PVC material, which is corrosion-resistant and wear-resistant.

[0039] Among them, the pipe chain conveyor 13 can be composed of structures such as pipelines, chain plates, motor boxes, tension boxes, corner boxes and sprockets, and can be used for horizontal-vertical-horizontal combined transportation in a compact space. The process pipe and return pipe of the pipe chain conveyor 13 are arranged up and down, and the horizontal-vertical-horizontal change section of the material conveying pipeline adopts a large arc bend design, and the arc radius is 10 times the radius of the pipe chain pipeline, which reduces the friction of the chain plate at this point. At the same time, the horizontal-vertical-horizontal change section of the return pipeline adopts a corner box design, which supports and tensions the conveying chain and ensures the stable operation of the chain; the first discharge port of the double-discharging port conveying pipeline adopts a rotary discharge valve design, and there is no residue when discharging; when meeting normal transportation needs, a larger pipe chain is selected, and the conveying speed is reduced by frequency conversion, and the material filling rate in the pipeline is reduced, thereby reducing the material breakage rate. The pipe and chain of the pipe chain conveyor 13 can be made of 304 stainless steel, and the conventional chain plate can be made of nylon 6 wear-resistant material. When conveying at high temperature, the chain plate can be made of tetrafluororubber.

[0040] Among them, the eddy current separator 4 can be integrated with a vibrating feeder, a magnetic roller, a magnetic drum, a conveyor belt machine, and an eddy current separator main machine. A feed port is arranged at the upper part of the vibrating feeder of the eddy current separator 4, and slag discharge ports are arranged at the lower part of the magnetic roller and the eddy current separator main machine respectively, for receiving ferrous metal impurities and non-magnetic conductive metals.

[0041] Among them, a hot and humid flue gas discharge port is provided at the top of the feed end of the tube bundle dryer 6, which can be connected to the inlet of the cyclone dust collector 7 through the flue gas pipeline, and the outlet of the cyclone dust collector 7 is connected to the inlet of the hot and humid flue gas condenser 8. The outlet of the hot and humid flue gas condenser 8 is connected to the dryer induced draft fan through the flue gas pipeline, and the outlet of the dryer induced draft fan enters the flue gas treatment unit through the flue gas pipeline for treatment, and finally meets the emission standards. The steam inlet of the tube bundle dryer 6 can be connected to the heating steam pipeline, and the condensate outlet of the tube bundle dryer 6 can be connected to the condensate recovery pipeline. The tube bundle dryer 6 can be arranged at an angle, and the inclination slope can be 4°. The feeding structure and the exhaust gas outlet are arranged at the upper end of the drum, and the unloading structure, the air inlet and the steam inlet and outlet are arranged at the lower end of the drum. The equipment barrel and the cover are insulated, and the reducer motor is an explosion-proof motor, and the speed is adjusted by frequency conversion. Multiple groups of steam pipes are arranged in the tube bundle dryer 6, and the inner wall is welded with a lifting plate arranged at a certain angle. The high-temperature steam is introduced into the steam pipe and the tube bundle dryer 6 cylinder rotates to lift the plate to sprinkle the activated carbon material, so as to quickly remove moisture. The feeding system of the tube bundle dryer 6 can be composed of a feeding hopper and a screw conveyor. The feeding hopper is tightly connected to the discharge port of the front tube chain conveyor 13. The feeding hopper plays the role of buffering and material sealing. The screw conveyor has a short conveying distance and is arranged horizontally. The gap between the spiral blade and the tube wall is set very small, and the crushing of the material is avoided during the overall conveying process. The screw conveyor can use an explosion-proof variable frequency motor to stably adjust the conveying speed through frequency conversion. The discharge port of the tube bundle dryer 6 can be installed with a heavy hammer flap valve air lock. The valve plate automatically opens under the action of gravity. After the material falls, the counterweight lever system automatically resets the valve plate, which not only has the function of stabilizing the material conveying, but also prevents the entire system from entering the outside wind.

[0042] Among them, the temporary storage bins include a raw material temporary storage bin 32, an activated carbon drying temporary storage bin 9 and a finished product temporary storage bin 14. The raw material temporary storage bin 32 is used for temporary storage of activated carbon materials after screening pretreatment and feeding to the tube bundle dryer 6, the activated carbon drying temporary storage bin 9 is used for temporary storage of activated carbon materials after drying pretreatment and feeding to the microwave regeneration unit 10, and the finished product temporary storage bin 14 is used for temporary storage of cooled activated carbon and feeding to the screening and packaging unit. The silo is made of stainless steel to prevent materials from corroding the silo body or the silo body from rusting; the silo is equipped with internal and external ladders, inspection ports and guardrails with a height of 1.2 meters, and the internal ladder is made of stainless steel; a dust removal device is installed on the top of the silo to prevent dust in the silo from polluting the air; the silo is equipped with a level meter, which can accurately monitor the changes in the material level in the silo online; a guide plate is installed from the silo discharge port to the silo bottom area to prevent the material from falling directly from the silo top during feeding and causing the material to break; an activated hopper is installed at the bottom of the silo with a vibration arch breaking function to prevent the material from being blocked at the discharge port; a gate valve and a pneumatic gate valve are installed at the bottom of the silo, and the gate valve is in a normally open state. The discharge speed is controlled by adjusting the opening and closing degree of the gate valve; the silo bottom is at a certain height from the ground to meet the connection requirements of the discharge port and the pipe chain conveyor 13.

[0043] The microwave regeneration unit 10 is composed of a feed box 101, a feed screw conveyor 102, a microwave rotating bed 104, a discharge screw conveyor 103 and other structures; the microwave rotating bed 104 can be fixed on a steel structure platform, and the main rotating bed of the microwave rotating bed 104 is a cylindrical structure furnace body. The bottom and the furnace body of the furnace body adopt a sealed disk design, and the interior is lined with corrosion-resistant, high-temperature-resistant, and high-strength materials. The heat-resistant material has excellent mechanical and chemical properties, which can greatly extend the service life of the furnace body, reduce the maintenance of the furnace body, and reduce the operating cost. At the same time, the interior is insulated with heat-insulating cotton to reduce the energy loss of the equipment and ensure that the surface temperature of the equipment does not exceed 50°C. At the same time, a resonant cavity layer made of heat-resistant and microwave-reflecting materials is installed on the inner wall of the furnace body for the homogenization of microwave energy in the furnace body. The furnace body is sealed as a whole, and there are a feed port, a stirring device, an exhaust port, a nitrogen injection port on the top of the furnace body, and a discharge device at the bottom. The stirring device of the microwave rotating bed is a hollow structure and is equipped with an activation gas interface. When newly made activated carbon is introduced, steam is introduced, and the newly made activated carbon can be carbonized under microwave radiation and activated by water vapor to generate activated carbon with adsorptive properties. With the accumulation of microwave energy, under the combined action of pyrogenic and non-pyrogenic effects, the raw material gradually heats up, and the volatile phenol inside begins to volatilize, desorb, crack and carbonize. When a certain temperature is reached, one or a mixture of gases such as carbon dioxide, carbon monoxide or water vapor is introduced as a catalyst to open pores on the surface of the raw material to form pores, making it have adsorptive properties.

[0044] The feeding screw conveyor 102 is connected to the feeding port of the microwave rotating bed 104 by flange and is provided with an expansion joint. The discharging screw conveyor 103 is connected to the feeding port of the multi-tube cooler 12 by flange and is provided with an expansion joint. A cooling water jacket can be provided on the outside of the discharging screw conveyor 103, and a cooling water inlet and outlet pipe is provided on the jacket to initially cool down the high-temperature activated carbon. Two safety valves can be provided on the upper part of the microwave rotating bed 104 furnace body. When the internal pressure of the equipment body suddenly increases, the safety valve automatically opens to empty and release the pressure. The high-temperature activated carbon after microwave regeneration is The discharge screw conveyor 103 enters the multi-tube cooler 12 for cooling. When the multi-tube cooler 12 is running, the reduction motor drives the external gears of the multi-tube cooler 12 to rotate. The multi-tube cooler 12 is provided with multiple groups of closed spiral pipes. During the rotation of the cooler, the high-temperature activated carbon enters the closed spiral pipe and exchanges heat with the circulating cooling water introduced into the shell layer. The high-temperature activated carbon material is gradually cooled during the transportation in the closed spiral pipe. After cooling to about 60°C, it enters the pipe chain conveyor 13 through the discharge port lock valve and is transported to the finished product temporary storage warehouse for temporary storage.

[0045] Among them, the dynamic and static joints at the front and rear ends of the multi-tube cooler 12 are sealed with a sealing device to ensure that the system is isolated from external air, and a flow switch is set on the cooling water inlet pipe and a temperature sensor is set on the outlet pipe. When the system automatically detects that the flow rate is too low or the outlet water temperature exceeds the standard, it stops the system feeding and alarms.

[0046] Among them, the closed linear vibrating screen 15 can be composed of a feed port, a dust cover, a screen box, a screen frame, a screen, a discharge port, a vibration motor, a motor base, a vibration damping spring, a bracket and other structures. When the closed linear vibrating screen 15 is working, the two vibration motors installed longitudinally on the screen body rotate relative to each other, and the eccentric blocks at both ends of the two vibration motors generate a rated exciting force. The exciting force generated in the lateral direction is offset by the relative operation of the motors, and the longitudinal exciting force is transmitted to the entire screen box through the vibration transmission body, so that the screen surface vibrates, so that the material on the screen surface is subjected to the exciting force and jumps toward the discharge port on the screen surface. The material smaller than the screen hole passes through the screen hole and falls to the lower discharge port. The upper material on the screen flows out from the upper discharge port after continuous jumping. After the material is graded by the vibrating screen, several materials of different particle sizes can be obtained, and the material grading operation is completed; the materials of different particle sizes are discharged from the discharge port and are sealed and transported to different ton bag packaging machines through the pipe chain conveyor 13 for finished product packaging.

[0047] Among them, the first ton bag packaging machine 16 and the second ton bag packaging machine 17 have the same structure, and are both composed of a frame, a silo (with a dust collection interface), a high and low material level meter, a manual gate valve, a pneumatic fan valve, a pneumatic butterfly valve, a bag clamping device, a weighing device, a lifting device, an electric control box, a chain conveyor and other structures. A feed port is provided on the top of the silo, which is connected to the tube chain conveyor 13, and a dust collection interface is provided on the top of the silo, which is connected to the cyclone dust collector 7 through a flue gas collection pipe. The entire packaging process is automatically controlled by the program and has an automatic / manual switching function. The normal operation is automatic operation, and the manual operation mode is used for maintenance, debugging or emergency processing. The weighing control instrument is a full-panel digital adjustment and parameter setting, with functions such as weight accumulation display, automatic peeling, automatic zeroing, automatic drop correction, out-of-tolerance alarm, and fault self-diagnosis.

[0048] Among them, the outer surface temperature of each unit equipment and pipeline of the continuous waste activated carbon regeneration system exceeds 60°C, and thermal insulation treatment is carried out; the material of each unit in contact with the activated carbon is 304 stainless steel (except for the skirt conveyor belt and pipe connecting chain plate).

[0049] Among them, the flue gas treatment unit mainly treats the waste gas generated by the above units. The flue gas from the semi-automatic ton bag unpacking machine 2 and the eddy current separator 4 is dust-removed and purified by the cartridge dust collector 5. The flue gas from the tube bundle dryer 6 is dust-removed and purified by the cyclone dust collector 7 and the cartridge dust collector 5. The flue gas from the closed linear vibrating screen 15, the first ton bag packaging machine 16, and the second ton bag packaging machine 17 is dust-removed and purified by the cyclone dust collector 7 and the cartridge dust collector 5. The above three low-temperature flue gases are collected into one flue gas main pipe and connected to the air mixing box 23.

[0050] Among them, the high-temperature flue gas generated by thermal desorption of the microwave rotating bed 104 is treated by dust reduction in the gravity settling chamber 11, and then merged into another flue gas main pipe, connected to the gas-to-gas heat exchanger 21 for preliminary cooling. The flue gas after preliminary cooling is connected to the gas-liquid heat exchanger 22 through the flue gas pipeline, and sent to the mixing box 23 through the flue gas pipeline, and mixed with 3 streams of low-temperature exhaust gas in the mixing box 23 for further cooling. At the same time, the blower adds fresh air to the mixing box 23 according to the intake air concentration, so that the VOCs concentration meets the requirements for entering the incinerator. The flue gas diluted by the mixed air is connected to the water scrubber 24 through the flue gas pipeline to reduce the dust concentration. After passing through the water scrubber 24, the flue gas enters the dry filter 25 to remove particulate matter, dust and droplets in the exhaust gas, and protect the subsequent incinerator from being blocked. The purified high-concentration organic waste gas is sent to the incinerator through the induced draft fan 20. After the exhaust gas absorbs heat and heats up in the preheating chamber, it enters the combustion chamber for high-temperature incineration (the combustion temperature is between 760 and 900°C). The organic exhaust gas is connected to the combustion chamber, and the volatile organic matter is oxidized and decomposed to generate carbon dioxide and water. The tail gas after high-temperature oxidation is discharged through the outlet pipeline to the subsequent tail gas treatment equipment. The incinerator 26 is internally provided with high-temperature resistant and corrosion-resistant materials. A temperature sensor is provided inside the furnace body, and the power output is adjusted through temperature detection by the temperature sensor to maintain a constant temperature inside the cavity. An explosion relief valve is also provided on the upper part of the furnace body. Even if a deflagration occurs during the combustion process, the pressure in the furnace can be urgently discharged through the explosion relief valve to release the smoke, thereby avoiding safety accidents.

[0051] Among them, the burner of the incinerator 26 adopts a low-pressure head proportional adjustment type gas burner, which can achieve continuous proportional adjustment. The fuel is natural gas, and the high-pressure ignition can adapt to a variety of situations. The combustion control system includes a combustion controller, a flame detector, a high-pressure igniter and corresponding valve components. The high-temperature sensor in the oxidation chamber feeds back temperature information to the burner so that the burner can provide the size of the heat supply. The combustion system has functions such as pre-purge before ignition, high-pressure ignition, flameout protection, over-temperature alarm and over-temperature fuel supply cut-off. The temperature in the oxidation chamber (adjustable) is stable at about 800°C. When the temperature of the oxidation chamber exceeds the temperature, the system will automatically alarm and automatically cut off the fuel supply.

[0052] Among them, the gas after the combustion of the incinerator 26 equipment may have some incomplete combustion of gas, and some gas may be toxic and harmful, so it is necessary to purify the gas after combustion; the tail gas enters the cooling tower 27 through the flue gas pipeline. The cooling tower is mainly composed of a cylinder, an upper water injection tank, a lower overflow hole, a cleaning hole, etc. Its working principle is: the airflow enters the cylinder through the inlet flue. Water enters the cylinder from the upper water injection tank of the cooling tower 27, so that a layer of water film is formed on the inner wall of the entire cylinder and flows from top to bottom. The flue gas enters tangentially from the lower part of the cylinder and rotates and rises in the cylinder. Under the action of centrifugal force, the gas always rubs and mixes with the water film on the inner wall of the cylinder, so that the dust and water-soluble components contained in the gas enter the water body and are discharged from the overflow hole. The bottom of the cylinder is sealed and a water seal groove is provided to prevent the flue gas from leaking from the bottom. There is a cleaning hole to facilitate the cleaning of the bottom of the cylinder. The wastewater is discharged from the bottom overflow hole into the sedimentation box, precipitated and neutralized, and recycled. The purified gas is led out through the upper cone of the cylinder, thus achieving the purpose of dust removal and cooling.

[0053] Among them, the waste gas after cooling and dust removal enters the alkali washing tower 28 through the flue gas pipeline, and the acidic gas in the tail gas is removed by spraying alkali liquid. The alkali washing tower 28 can adopt a two-phase countercurrent absorption packing tower, equipped with an automatic dosing system, and set up auxiliary equipment such as pH probe, mixer, dosing pump, etc., and adjust the pH value of the spray liquid in time according to the pH change of the tower body. The waste gas containing acidic gas enters from the flue gas pipeline at the bottom of the alkali washing tower 28, and the gas rises and enters the first-stage spray section. In the spray section, the alkali liquid is sprayed out at high speed from the uniformly distributed nozzles, forming countless fine droplets that are fully mixed, contacted, and chemically reacted with the gas, and the acidic components in the waste gas and the alkaline components in the liquid are neutralized. Then the gas rises to the second-stage packing section and the spray section to carry out an absorption process similar to the first stage. The top of the tower body is the demisting section, where the absorption liquid droplets entrained in the gas are removed, and the treated gas enters the next-stage processing equipment from the exhaust pipe at the upper end of the absorption tower.

[0054] Among them, after the waste gas is washed with alkali to remove acid, it enters the activated carbon adsorption box 29 through the flue gas duct. Through the activated carbon adsorption, the activated carbon fully adsorbs harmful substances such as organic matter and dioxins in the flue gas. After the above treatment process, the flue gas meets the emission standards and is sent to the chimney 30 through the induced draft fan 20 to be discharged into the atmosphere. In accordance with the requirements of the specifications, an exhaust gas sampling platform and a sampling port are set in the chimney 30, and an online flue gas detection device is set to detect the exhaust gas after purification, so that the exhaust gas is discharged after meeting the standards.

[0055] Among them, for the closed-loop cooling water tower, it has a closed-loop cooling tower auxiliary machine 18, and can be equipped with a water tank and a main circulation pump (one for backup and one for use). The hot water inlet of the circulating cooling water tower is connected to the cooling water return main pipe of the wet hot flue gas condenser 8, the gas-liquid heat exchanger 22, the multi-tube cooler 12, and the microwave rotating bed 104, and the cooling water main circulation pump outlet is connected to the water inlet main pipe of the above-mentioned water-using equipment.

[0056] The nitrogen outlet of the nitrogen generator is connected to the nitrogen injection port of the microwave rotating bed 104 to purge and replace the interior of the microwave rotating bed 104 with nitrogen, and the oxygen content in the microwave rotating bed 104 is controlled below 3% to shield the production conditions of dioxins and ensure the safety of the overall equipment operation.

[0057] The continuous activated carbon preparation and regeneration system may also be provided with an online oxygen content analyzer to detect the oxygen content in the main body of the microwave rotating bed 104, and be linked with the automatic control to start the nitrogen protection device.

[0058] Among them, the buffer bins of the raw material temporary storage bin 32, the drying temporary storage bin 9, the finished product temporary storage bin 14, the feed box 101, the first ton bag packaging machine 16 and the second ton bag packaging machine 17 can be equipped with a level meter, which is suitable for level detection. The bottom of the raw material temporary storage bin 32, the drying temporary storage bin 9, and the finished product temporary storage bin 14 can be equipped with an activated hopper with a vibration arch breaking function to prevent the material from being blocked at the discharge port, and the discharge port at the bottom of the bin is equipped with a manual gate valve and a pneumatic gate valve. The discharge speed is controlled by adjusting the opening and closing degree of the gate valve. The bin top is equipped with a dust removal device to prevent dust in the bin from polluting the air.

[0059] Among them, two dust collection ports can be set at the front and rear ends of the top sealing cover of the eddy current separator 4, which are connected to the matching cartridge dust collector 5 through the flue gas pipeline. The closed linear vibrating screen 15 and the dust collection port of the ton bag packaging machine are connected to the cyclone dust collector 7 through the flue gas pipeline, and the flue gas outlet of the cyclone dust collector 7 is connected to its matching cartridge dust collector 5. After dust removal and purification, the exhaust gas enters the flue gas treatment unit through the flue gas pipeline for treatment and finally meets the emission standards.

[0060] Among them, the electrical equipment of each unit of the continuous activated carbon preparation and regeneration system can use electrical equipment that meets the explosion-proof grade requirements in accordance with GB50058 "Design Specifications for Electrical Installations in Explosive Atmospheres".

[0061] Among them, the continuous activated carbon preparation and regeneration system should also include an air compressor, a steam boiler, an instrument automatic control system, an electrical system, and connecting pipes, valves and wires, etc. These are existing technologies that can be obtained by technical personnel in this field and will not be repeated here.

[0062] Among them, the continuous activated carbon preparation and regeneration system can also include a control room 33, which is electrically connected to the pretreatment unit, microwave regeneration unit, cooling unit, screening and packaging unit, flue gas treatment unit, etc., for automatic feeding and unloading of materials and completing related action instructions to reduce the use of manpower and improve work efficiency and stability.

[0063] Among them, the tube chain machine in the present application can be an existing tube chain conveyor, which uses a chain plate as a transmission component to drive the material to move along the pipeline in a closed pipeline. When transporting horizontally, the material particles are thrust by the chain plate in the direction of movement. When the internal friction between the material layers is greater than the external friction between the material and the pipe wall, the material moves forward with the chain plate to form a stable material flow; when transporting vertically, the material particles in the pipe are pushed upward by the chain plate, because the lower feeding prevents the upper material from sliding down, and a lateral side pressure is generated, so the internal friction of the material is enhanced. When the internal friction between the materials is greater than the external friction between the material and the inner wall of the pipe and the weight of the material, the material is transported upward with the chain plate to form a continuous material flow.

[0064] When the continuous activated carbon preparation and regeneration system in the present application is in operation, the waste activated carbon is first unpacked by the semi-automatic ton bag unpacking machine 2, and then the large impurities in the activated carbon are removed by the high-frequency vibration of the screen of the circular vibrating screen 31, and the large particles of waste debris can be collected and incinerated. The material screened by the circular vibrating screen 31 is transported to the entrance of the eddy current separator 4 by a closed skirt belt conveyor 3 for sorting, and the metallic iron and non-ferrous metals in the activated carbon are collected. The qualified activated carbon is sent to the raw material temporary storage bin 32 for buffering via a pipe chain conveyor, and the activated carbon in the raw material temporary storage bin 32 is sent to the tube bundle dryer 6 via a pipe chain conveyor, and the activated carbon is dried by high-pressure steam through a partition heat exchange. Of course, a part of the activated carbon that does not need to be dried and the activated carbon that has been dried can be sent to the drying temporary storage bin 9 for buffering via a pipe chain conveyor. The cached activated carbon is sent to the microwave regeneration unit 10 for regeneration via a tube chain conveyor. The nitrogen required for regeneration can be provided by a nitrogen generator. The regenerated activated carbon enters the multi-tube cooler 12 for cooling. The cooled activated carbon can be sent to the finished product temporary storage bin 14 for temporary storage. The temporarily stored activated carbon can be sent to the first ton bag packaging machine 16 for direct packaging via a tube chain conveyor, or it can be sent to the closed linear vibrating screen 15 for screening first, and then the materials with different particle sizes are sorted out and sent to the first ton bag packaging machine 16 and the second ton bag packaging machine 17 for packaging. The packaged activated carbon can be put into the finished product warehouse. Among them, the flue gas generated when the eddy current separator 4, the first ton bag packaging machine 16, and the second ton bag packaging machine 17 are working can be sent to the flue gas treatment unit for treatment after dust removal. The flue gas generated when the tube bundle dryer 6 is working can be sent to the flue gas treatment unit for treatment after dust removal and condensation by the wet hot flue gas condenser 8, and the waste water generated when the wet hot flue gas condenser is working can be sent to the waste water treatment system for treatment. The flue gas generated when the microwave regeneration unit 10 is working can be sent to the flue gas treatment unit for treatment after dust removal by the gravity settling chamber 11.

[0065] In summary, the continuous activated carbon preparation and regeneration system in this application can be heated as a whole: microwave heating utilizes the internal friction of materials caused by polar molecular motion and forced oscillation to generate heat, thereby bypassing the heat transfer bottleneck of "conduction, convection, and radiation" that traditional heating must face, and achieving uniform and simultaneous heating of the waste activated carbon as a whole, effectively ensuring the quality of waste activated carbon regeneration. At the same time, the volume heating advantage of microwaves can make the materials adsorbed by the activated carbon desorb quickly from the inside in the form of violent boiling, reducing the problem of carbonization cracking and pore blocking caused by too long residence time, and the performance recovery rate is high. The performance recovery rate of activated carbon within five regeneration cycles is greater than 90%. In traditional partition-type heat exchange equipment, such as external heating rotary kilns, splint-type reactors, etc., heat needs to be transferred to the waste activated carbon through the heat exchange partition, and the waste activated carbon is also gradually heated from the outside to the inside, which is easy to cause local heating too fast to cause the activated carbon pores to collapse and local heating too slow to cause slow cracking and carbonization to block the pores. And the heat exchange partition for a long time will also cause the problem of coking and ringing, resulting in a significant reduction in heat exchange efficiency.

[0066] The continuous activated carbon preparation and regeneration system in this application can perform selective heating: microwave heating only works on absorbing materials, and non-absorbing materials under normal conditions can also be transformed into absorbing materials by changing their conditions, so that targeted materials can be heated in a targeted manner, greatly saving ineffective energy consumption. (Activated carbon itself is a good absorbing material).

[0067] The continuous activated carbon preparation and regeneration system in this application is passive heating: there is no open flame burning inside the microwave reactor, and the energy source irradiates the material in the form of electromagnetic waves, causing the material to heat itself, making the whole process safer, cleaner and more efficient.

[0068] The continuous activated carbon preparation and regeneration system in the present application can perform instant heating: microwave heating can be started and stopped immediately, and the thermal inertia of the material is small after the heating stops due to selective absorption, and the heating and cooling time is shorter. Not only is the furnace startup and shutdown flexible and cost-effective, but more importantly, the temperature control is more precise and the quality of the regenerated carbon is higher (in the regeneration of activated carbon, when there are substances that are difficult to desorb, when the temperature is controlled at 400-900°C, the specific surface area of ​​the regenerated carbon is the largest, the pore volume is the largest, and the pore size is closest to the new carbon. The regeneration effect is best when the activation time is 10-30 minutes).

[0069] The microwave rotating bed 104 technology of the continuous activated carbon preparation and regeneration system in the present application has a high energy density: compared with a reactor using a low-power microwave source (1.5kW), the rotating bed reactor uses a single 915 MHz 75kW high-power microwave source, which has a higher energy density and an effective penetration thickness of 328mm for the material, which is nearly 3 times the penetration thickness (122mm) of other reactors using a low-power microwave source (such as a tunnel kiln). It can enable the activated carbon to reach the target temperature faster, and is easier to form a boiling effect inside the activated carbon, and the desorption efficiency of volatile phenols is higher, thereby improving the processing efficiency.

[0070] The microwave rotating bed 104 technology of the continuous activated carbon preparation and regeneration system in the present application has a high degree of integration and a low degree of failure: the microwave rotating bed 104 reactor uses two 75kW high-power microwave sources. Compared with multi-mode reactors (such as microwave vertical stacking reactors, microwave tunnel kiln reactors, etc.) that use a large number (up to hundreds) of 1.5kW low-power microwave sources, the microwave rotating bed 104 has a higher degree of integration, fewer failure points, and can perform single microwave source failure inspection and repair without stopping the furnace, greatly reducing equipment maintenance costs; the microwave field of the rotating bed reactor with only two large microwave sources is relatively uniform. Compared with the furnace type with dozens or even hundreds of small microwave sources, the mutual superposition of many microwave fields is likely to form a large number of peaks and troughs. Strong energy peaks are likely to cause breakdown and damage of equipment, and weak energy troughs are likely to cause "cooked" materials.

[0071] The microwave rotating bed 104 technology of the continuous activated carbon preparation and regeneration system in this application has good sealing performance, high quality of regenerated carbon and low carbon loss: The "microwave rotating bed 104" technology adopted in this project has fewer moving parts inside the rotating bed reactor, and the moving parts themselves have little interference with the microwave field. The stable microwave field heats the material more evenly, and the quality of the regenerated carbon is more stable. The sealed oxygen-free atmosphere (nitrogen, water vapor) regenerates in an oxygen-free environment throughout the process, and the carbon burn loss is small; the rotating bed mode has a short process flow, short residence time, and less carbon wear. The carbon loss of a single regeneration of activated carbon is less than 10%, and the number of regeneration cycles of activated carbon can reach more than 10 times.

[0072] The microwave rotating bed 104 technology and materials of the continuous activated carbon preparation and regeneration system in this application have wide applicability: the temperature of the microwave rotating bed 104 reactor can be as high as 950°C or above, which is suitable for the regeneration of various types of waste activated carbon, and can also be used for the production of new coal-based and wood-based activated carbon. The equipment is more versatile and has a wider range of applications.

[0073] The microwave rotating bed 104 technology of the continuous activated carbon preparation and regeneration system in the present application has a high degree of modularity: the microwave rotating bed 104 adopts a modular design and can be combined and expanded according to the size of the processing scale to meet the processing needs of different scales.

[0074] The microwave rotating bed 104 technology of the continuous activated carbon preparation and regeneration system in this application occupies a small area and has low infrastructure costs: although the microwave rotating bed 104 reactor itself is taller than the traditional partition-type heat exchange reactor, it is highly integrated and occupies a small area (the main equipment of the two systems occupies an area of ​​less than 500 square meters); the equipment is light in weight and has low infrastructure requirements (no special equipment foundation is required, ordinary cement floor is sufficient), which can greatly reduce the cost of land and factory infrastructure.

[0075] The continuous activated carbon preparation and regeneration system in this application can be highly intelligently controlled: microwave heating uses electricity as the only energy source, and the entire process is highly automated, which greatly saves labor costs and makes operation safer and more stable.

[0076] The continuous activated carbon preparation and regeneration system in this application is more environmentally friendly: microwave heating regenerates the waste activated carbon, and an oxygen-free environment is used throughout the process, without the generation of dioxins and fly ash. In addition, no chemical reagents and water are required during the process, avoiding the risk of secondary pollution.

[0077] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A continuous activated carbon preparation and regeneration system, characterized in that: include: A pretreatment unit for unpacking and sorting the activated carbon; A microwave regeneration unit (10), the inlet of the microwave regeneration unit (10) being connected to the outlet of the pretreatment unit, and utilizing microwave heating to cause the adsorbate of the activated carbon to boil violently, thereby achieving desorption and cracking of the adsorbate; a cooling unit, the inlet of which is connected to the outlet of the microwave regeneration unit (10), and is used to cool the activated carbon; A screening and packaging unit, the inlet of which is connected to the outlet of the cooling unit, is used for screening and packaging the activated carbon after cooling.

2. The continuous activated carbon preparation and regeneration system according to claim 1, characterized in that: The pretreatment unit comprises a semi-automatic ton bag unpacking machine (2), a circular vibrating screen (31), a closed skirt-type belt conveyor (3), an eddy current separator (4) and a raw material temporary storage bin (32); The outlet of the semi-automatic ton bag unpacking machine (2) is connected to the feed port of the circular vibrating screen (31), and the discharge port of the circular vibrating screen (31) is connected to the inlet of the eddy current separator (4) via the closed skirt-type belt conveyor (3); The outlet of the eddy current separator (4) is connected to a tube chain machine, and the separated materials are transported to a temporary raw material storage bin (32). The temporary raw material storage bin (32) is connected to the inlet of the microwave regeneration unit (10) through the tube chain machine.

3. The continuous activated carbon preparation and regeneration system according to claim 2, characterized in that: The microwave regeneration unit (10) comprises a feed box (101), a feed screw conveyor (102), a microwave rotating bed (104) and a discharge screw conveyor (103); The inlet of the feed box (101) is connected to the outlet of the eddy current separator (4), the outlet of the feed box (101) is connected to the inlet of the microwave rotating bed (104) through the feed screw conveyor (102), and the outlet of the microwave rotating bed (104) is connected to the inlet of the cooling unit through the discharge screw conveyor (103).

4. The continuous activated carbon preparation and regeneration system according to claim 3, characterized in that: It also includes a tube bundle dryer (6) and a drying temporary storage silo (9); The inlet of the tube bundle dryer (6) is connected to the outlet of the raw material temporary storage bin (32) via a tube chain machine, the outlet of the tube bundle dryer (6) is connected to the tube chain machine, the other end of the tube chain machine is connected to the inlet of the drying temporary storage bin (9), and the outlet of the drying temporary storage bin (9) is connected to the inlet of the feed box (101) via a tube chain machine.

5. The continuous activated carbon preparation and regeneration system according to claim 4, characterized in that: The cooling unit is a multi-tube cooler (12), the outlet of the discharging screw conveyor (103) is connected to the inlet of the multi-tube cooler (12), and the outlet of the multi-tube cooler (12) is connected to the inlet of the screening and packaging unit through a tube chain machine.

6. The continuous activated carbon preparation and regeneration system according to claim 5, characterized in that: It also includes a finished product temporary storage bin (14), the inlet of which is connected to the outlet of the multi-tube cooling machine (12) via a tube chain machine, and the outlet of which is connected to the inlet of the screening and packaging unit via a tube chain machine.

7. The continuous activated carbon preparation and regeneration system according to claim 6, characterized in that: The screening and packaging unit comprises a closed linear vibrating screen (15), a first ton bag packaging machine (16) and a second ton bag packaging machine (17); The outlet of the finished product temporary storage bin (14) is connected to the inlet of the closed linear vibrating screen (15) through a tube chain machine, and the first outlet of the closed linear vibrating screen (15) is connected to the inlet of the first ton bag packaging machine (16) through a tube chain machine; The second outlet of the closed linear vibrating screen (15) is connected to the inlet of the second ton bag packaging machine (17) via a tube chain machine.

8. The continuous activated carbon preparation and regeneration system according to claim 7, characterized in that: It also includes a flue gas treatment unit, which includes an air mixing box (23), a water washing tower (24), a dry filter (25), an incinerator, a cooling tower (27), an alkali washing tower (28), an activated carbon adsorption box (29) and a chimney (30) connected in sequence; The smoke outlets of the semi-automatic ton bag unpacking machine (2) and the eddy current separator (4) are both connected to the inlet of the air mixing box (23); A moist hot flue gas condenser (8) is provided at the flue gas outlet of the tube bundle dryer (6), and the outlet of the moist hot flue gas condenser (8) is connected to the inlet of the air mixing box (23); The smoke outlets of the closed linear vibrating screen (15), the first ton bag packaging machine (16) and the second ton bag packaging machine (17) are all connected to the inlet of the air mixing box (23).

9. The continuous activated carbon preparation and regeneration system according to claim 8, characterized in that: The flue gas treatment unit further comprises a gas-to-gas heat exchanger (21) and a gas-to-liquid heat exchanger (22) connected to each other; The outlet of the gas-liquid heat exchanger (22) is connected to the inlet of the air mixing box (23); A gravity settling chamber (11) is provided at the smoke outlet of the microwave rotating bed (104), and the smoke outlet of the gravity settling chamber (11) is connected to the inlet of the gas-to-gas heat exchanger (21) via a pipeline.

10. The continuous activated carbon preparation and regeneration system according to claim 9, characterized in that: It also includes a closed-loop cooling tower (19), a nitrogen generator, a steam boiler, and a dust collector; The hot water inlet of the closed-loop cooling tower (19) is connected to the cooling water return main pipe of the moist hot flue gas condenser (8), the gas-liquid heat exchanger (22), the multi-tube cooler (12) and the microwave rotating bed (104), and the outlet of the closed-loop cooling tower (19) is connected to the cooling water inlet main pipe of the moist hot flue gas condenser (8), the gas-liquid heat exchanger (22), the multi-tube cooler (12) and the microwave rotating bed (104); The nitrogen outlet of the nitrogen generator is connected to the nitrogen injection port of the microwave rotating bed (104); The dust collector is provided at the smoke outlets of the eddy current separator (4), the tube bundle dryer (6), the closed linear vibrating screen (15), the first ton bag packaging machine (16) and the second ton bag packaging machine (17); The steam generated by the steam boiler is connected to the steam inlet of the tube bundle dryer through a part of the steam pipeline for drying the raw materials; the other part is connected to the steam inlet of the stirring device on the microwave rotating bed for use as an activator for newly prepared activated carbon.

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