A regeneration and desorption system and desorption method for fluorine-containing waste activated carbon

Abstract

The present invention discloses a regeneration and desorption system and a desorption method for fluorine-containing waste activated carbon, including a support platform, a fixed disk is rotatably connected to the support platform, a bottom plate is connected to the support platform through an electric telescopic rod, a reaction furnace body is rotatably connected to the bottom plate, a plurality of partition plates are fixedly connected in the reaction furnace body, and a storage component is arranged between every two adjacent partition plates; a limiting component is arranged on the fixed disk; a driving component is arranged on the bottom plate. The present invention can crush the lumps generated during the high-temperature reaction of fluorine-containing waste activated carbon powder with salt or alkali substances, and with the movement of the reaction furnace body, the storage component can lift the fluorine-containing waste activated carbon powder at the bottom, so that the mixture can be heated sufficiently and evenly. After the storage component moves to crush the lumps, it will be cleaned by the scraping unit, avoiding the mixture adhering to the storage component or the partition plate.

Description

Technical Field

[0001] The present invention relates to the technical field of waste activated carbon regeneration, and in particular to a regeneration and desorption system and a desorption method for fluorine-containing waste activated carbon. Background Art

[0002] Fluorine-containing waste activated carbon mainly comes from the process of using activated carbon to treat fluorine-containing wastewater. In this process, activated carbon effectively removes fluoride ions from water through physical adsorption and chemical adsorption. However, over time, the activated carbon will gradually become saturated and can no longer effectively adsorb fluoride ions, thus forming fluorine-containing waste activated carbon. Although fluorine-containing waste activated carbon becomes waste after adsorption saturation, its recycling is of great significance. Through proper regeneration treatment, its adsorption capacity can be restored, its service life can be extended, and resource waste can be reduced. Regeneration methods include thermal regeneration, chemical regeneration, and biological regeneration, which can effectively remove pollutants adsorbed on the activated carbon and restore its adsorption performance.

[0003] For example, the Chinese invention patent application number: 202410313711.8, entitled "Waste Activated Carbon Regeneration Equipment," discloses a waste activated carbon regeneration equipment comprising a crushing device, an activation furnace, and a lifting assembly; the crushing device is used to crush the waste activated carbon in blocks, and a second discharge port is provided at the lower end of the crushing device; a first feed port and a first discharge port are provided on opposite side walls of the activation furnace, respectively, the first feed port is connected to the second discharge port, the activation furnace is used to receive and heat the crushed waste activated carbon, and an exhaust port is provided on the upper wall of the activation furnace near the first feed port; the lifting assembly is provided in the activation furnace and is used to lift the waste activated carbon in the activation furnace. The crushing device provided in the present invention can crush the waste activated carbon in blocks, which is beneficial for uniform heating of the waste activated carbon particles during the subsequent activation and regeneration process; the lifting assembly can keep the waste activated carbon in the activation furnace in a state of motion during the activation of the waste activated carbon, which is beneficial for uniform heating of the waste activated carbon in the activation furnace and ensures the activation effectiveness of the waste activated carbon during the activation process.

[0004] The shortcomings of the existing technology are: when the waste activated carbon is regenerated, a lifting device is required to lift the rolling waste activated carbon inside it so that the waste activated carbon can be fully heated. For example, in the above-mentioned device, the upper layer of waste activated carbon is lifted by using a lifting component, but the stacking of activated carbon powder at the bottom causes uneven heating, and fluorine-containing waste activated carbon requires the addition of salt or alkali for high-temperature reaction, and agglomeration may occur during the reaction, thereby affecting the reaction between substances, which has certain shortcomings. Summary of the Invention

[0005] The object of the present invention is to provide a regeneration and desorption system and a desorption method for fluorine-containing waste activated carbon to solve the above-mentioned deficiencies in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: A regeneration and desorption system for fluorine-containing waste activated carbon, comprising a support table, a fixed disk rotatably connected to the support table, a bottom plate connected to the support table through an electric telescopic rod, a reaction furnace body rotatably connected to the bottom plate, a plurality of partition plates fixedly connected in the reaction furnace body, and a storage component disposed between adjacent two of the partition plates; further comprising a limiting component disposed on the fixed disk; further comprising a driving component disposed on the bottom plate; when the reaction furnace body rotates to drive the fluorine-containing waste activated carbon at the bottom layer to move and enter the limiting component for screening and lifting, the storage component moves under the action of the driving component to roll and crush the agglomerated fluorine-containing waste activated carbon, and then a scraping unit cleans the surface of the storage component.

[0007] As a further description of the above technical solution:

[0008] The storage component includes a connecting rod slidably connected to the reaction furnace body; a receiving plate fixedly connected to the connecting rod, side plates slidably connected to the inside of both sides of the receiving plate, both of the side plates are connected to the inside of the receiving plate through a first spring, and an elastic rope is disposed between each receiving plate and the reaction furnace body.

[0009] As a further description of the above technical solution:

[0010] The limiting component includes an arc plate fixedly connected to the fixed disk, a plurality of filter holes are formed in the arc plate, and all of the plurality of partition plates contact the arc plate during their movement strokes.

[0011] As a further description of the above technical solution:

[0012] The driving component includes an auxiliary ring fixedly connected to the bottom plate, a track groove is formed in the auxiliary ring, and all of the plurality of connecting rods are slidably connected in the track groove.

[0013] As a further description of the above technical solution:

[0014] The scraping unit includes a scraping plate slidably connected in the arc plate, and the scraping plate is connected to the inner wall of the arc plate through a second spring.

[0015] As a further description of the above technical solution:

[0016] Further comprising a crushing cylinder, the crushing cylinder is communicated with the reaction furnace body through a conveying mechanism; the conveying mechanism includes a conveying auger communicated at the discharging end of the crushing cylinder, a guiding pipe is rotatably connected to the discharging pipe of the conveying auger, a semi-circular frame one is communicated on the guiding pipe, a semi-circular frame two is rotatably connected to the semi-circular frame one, and the semi-circular frame two is communicated with the reaction furnace body through a discharging pipe.

[0017] As a further description of the above technical solution:

[0018] An auxiliary component is provided in the first semi-circular frame, and the auxiliary component includes two limiting plates fixedly connected in the first semi-circular frame.

[0019] As a further description of the above technical solution:

[0020] A waste water pipe is connected to the discharging port of the reaction furnace body, a secondary treatment tank is connected to the waste water pipe, and a kinetic energy unit is arranged on the secondary treatment tank.

[0021] As a further description of the above technical solution:

[0022] The kinetic energy unit includes a driving rotating rod rotatably connected to the secondary treatment tank, a connecting frame is fixedly connected to the driving rotating rod, and the connecting frame is fixedly connected to the first semi-circular frame.

[0023] A desorption method for fluorine-containing waste activated carbon, the using method of which is the regeneration desorption system for fluorine-containing waste activated carbon as described above, and the activated carbon desorption and regeneration method includes the following steps:

[0024] S1: Pour the fluorine-containing waste activated carbon into the crushing cylinder for crushing, and then convey the crushed fluorine-containing waste activated carbon powder to the reaction furnace body through the conveying mechanism, add salt or alkali substances, introduce inert gas, and carry out high-temperature melting reaction for regeneration;

[0025] S2: After the reaction is completed, cool it to obtain a mixture of alkali or salt and activated carbon. Add water to the reaction furnace body to dissolve and filter the mixture to obtain activated carbon and salt solution, and the salt solution enters the secondary treatment tank for further treatment;

[0026] S3: Start the reaction furnace body again to dry the remaining activated carbon to obtain regenerated activated carbon.

[0027] In the above technical solution, the beneficial effects of a regeneration desorption system and desorption method for fluorine-containing waste activated carbon provided by the present invention are as follows:

[0028] By setting the support platform, fixed disk, bottom plate, reaction furnace body, partition plate, storage component, limiting component, driving component and scraping unit to cooperate with each other, the present invention can crush the agglomerates generated during the high-temperature reaction of fluorine-containing waste activated carbon powder with salt or alkali substances, and the storage component can lift the fluorine-containing waste activated carbon powder at the bottom as the reaction furnace body moves, so that the mixture can be heated sufficiently and evenly. After the storage component moves to crush the agglomerates, it will be cleaned by the scraping unit, avoiding the mixture adhering to the storage component or the partition plate. The device is simple and convenient to operate, and after the fluorine-containing waste activated carbon after high-temperature reaction is dissolved and filtered, the activated carbon can be dried and regenerated continuously, which has strong practicability.

[0029] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0030] This application document provides an overview of various implementations or examples of the technologies described in the present disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments described in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0032] Figure 1 Schematic diagram of the overall structure provided for the embodiments of the present invention;

[0033] Figure 2 Schematic diagram of the partial structure decomposition provided for the embodiments of the present invention;

[0034] Figure 3 Schematic diagram of the connection structure between the reaction furnace body and the fixed disk provided for the embodiments of the present invention;

[0035] Figures 4-5 Longitudinal sectional view of the reaction furnace body structure provided for the embodiments of the present invention;

[0036] Figure 6 For Figure 2 Enlarged view of part A in

[0037] Figure 7 For Figure 4 Enlarged view of part B in

[0038] Figure 8 For Figure 5 Enlarged view of part C in

[0039] Figure 9 For Figure 5 Enlarged view of part D in

[0040] Description of the reference numerals:

[0041] 1. Support platform; 11. Fixed disk; 12. Bottom plate; 13. Reaction furnace body; 14. Partition board; 21. Connecting rod; 22. Material receiving plate; 23. Side plate; 24. First spring; 25. Elastic cord; 31. Arc-shaped plate; 32. Filter hole; 41. Auxiliary ring; 42. Track groove; 51. Scraping plate; 52. Second spring; 61. Crushing cylinder; 62. Conveyor auger; 63. Guide pipe; 64. First semi-circular frame; 65. Second semi-circular frame; 66. Feeding pipe; 7. Limiting plate; 81. Waste water pipe; 82. Secondary treatment tank; 91. Active rotating rod; 92. Connecting frame. Detailed implementation manner

[0042] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present disclosure.

[0043] Please refer to Figures 1-9, a regeneration and desorption system for fluorine-containing waste activated carbon provided in this embodiment includes a support table 1, a fixed disk 11 is rotatably connected to the support table 1, a bottom plate 12 is connected to the support table 1 through an electric telescopic rod, a reaction furnace body 13 is rotatably connected to the bottom plate 12, and a part for supporting the fixed disk 11 is arranged on the support table 1. The part is connected to the fixed disk 11 through a rotating shaft, and a filter net for filtering liquid is arranged at the bottom of the fixed disk 11, and the bottom is arranged to be openable to facilitate discharging the fixed substances in the reaction furnace body 13. Among them, the electric telescopic rod is connected to an external power supply and a control switch. During discharging, by opening the channel on the fixed disk 11 and driving the reaction furnace body 13 to rise to an inclined state through the electric telescopic rod, it is convenient to discharge the fixed substances from the channel. A plurality of partition plates 14 are fixedly connected in the reaction furnace body 13, and a storage component is arranged between adjacent two partition plates 14; a limiting component is also included, which is arranged on the fixed disk 11; a driving component is also included, which is arranged on the bottom plate 12; when the reaction furnace body 13 rotates to drive the fluorine-containing waste activated carbon at the bottom layer to move and enter the limiting component for screening and lifting, the storage component moves under the action of the driving component to roll and crush the agglomerated fluorine-containing waste activated carbon, and then the surface of the storage component is cleaned by a scraping unit. When the fluorine-containing waste activated carbon powder in the reaction furnace body 13 undergoes a high-temperature dissolution reaction with salt or alkali substances, agglomeration will occur. As the reaction furnace body 13 moves, the storage component will lift the fluorine-containing waste activated carbon powder at the bottom. When the smaller fluorine-containing waste activated carbon powder overflows, when the agglomerates generated during the reaction stay in the space between the material receiving component, the partition plate 14 and the limiting component, at this time, the material receiving component moves under the action of the driving component to pat the agglomerates so that the agglomerates are crushed and fall off. This device can make the mixture be heated sufficiently and evenly, and after the storage component moves to crush the agglomerates, it will be cleaned by the scraping unit, avoiding the mixture adhering to the storage component or the partition plate 14.

[0044] In the further provided embodiment of the present invention, the storage component includes a connecting rod 21 slidably connected to the reaction furnace body 13; a material receiving plate 22 is fixedly connected to the connecting rod 21, side plates 23 are slidably connected to the inside of both sides of the material receiving plate 22, and both side plates 23 are connected to the inside of the material receiving plate 22 through a first spring 24. An elastic cord 25 is arranged between each material receiving plate 22 and the reaction furnace body 13. When the material receiving plate 22 moves closer to the reaction furnace body 13, the side plates 23 compressed on both sides of the material receiving plate 22 extend to fill the gap between the movement of the material receiving plate 22 and the partition plate 14, and at the same time when the side plates 23 extend, they will clean the side wall of the partition plate 14 to avoid adhesion.

[0045] Further, the driving assembly includes an auxiliary ring 41 fixedly connected to the bottom plate 12. An orbital groove 42 is formed in the auxiliary ring 41. A plurality of connecting rods 21 are all slidably connected in the orbital groove 42. The orbital groove 42 is formed by splicing two arc-shaped grooves into a complete closed loop, and the connection points of the two arc-shaped grooves at the head and tail are both arranged in an inclined shape. For the specific shapes of the two, reference can be made to the appended Figure 5 .

[0046] In the embodiment further provided by the present invention, the limiting assembly includes an arc-shaped plate 31 fixedly connected to the fixed disk 11. A plurality of filtering holes 32 are formed in the arc-shaped plate 31. During the movement stroke of the plurality of partition plates 14, they all come into contact with the arc-shaped plate 31. The filtering holes 32 are arranged at a part of the arc-shaped plate 31, and the purpose is to facilitate the screening of the mixture between the partition plate 14 and the material storage assembly.

[0047] Further, the scraping unit includes a scraping plate 51 slidably connected in the arc-shaped plate 31. The scraping plate 51 is connected to the inner wall of the arc-shaped plate 31 through a second spring 52. When the receiving plate 22 on the material storage assembly moves to the position of the scraping plate 51, the receiving plate 22 moves close to one side of the partition plate 14, which facilitates the movement of the scraping plate 51 under the action of the second spring 52 to clean the mixture attached to the receiving plate 22 and the partition plate 14.

[0048] In the embodiment further provided by the present invention, it further includes a pulverizing cylinder 61. The pulverizing cylinder 61 is communicated with the reaction furnace body 13 through a conveying mechanism; the conveying mechanism includes a conveying auger 62 connected to the discharging end of the crushing cylinder. The conveying auger 62 and the pulverizing cylinder 61 are both existing devices. By first pulverizing the fluorine-containing waste activated carbon, it is convenient for later treatment. A guiding pipe 63 is rotatably connected to the discharging pipe 66 of the conveying auger 62. A semi-circular frame one 64 is communicated with the guiding pipe 63. A semi-circular frame two 65 is rotatably connected to the semi-circular frame one 64. The semi-circular frame two 65 is supported and fixed by an external supporting device. The semi-circular frame two 65 is communicated with the reaction furnace body 13 through the discharging pipe 66. The reaction furnace body 13 can be set in multiple groups. By rotating and switching the semi-circular frame one 64, the powder entering through the guiding pipe 63 is conveyed to different reaction furnace bodies 13, realizing the feeding of one pulverizing cylinder 61 to multiple reaction furnace bodies 13, and also avoiding the trouble of the existing fluorine-containing activated carbon needing to use a receiving device after being broken and then being introduced into the reaction furnace body 13, improving the use efficiency of the equipment.

[0049] In the embodiment provided by the present invention, an auxiliary assembly is arranged in the semi-circular frame one 64. The auxiliary assembly includes two limiting plates 7 fixedly connected to the semi-circular frame one 64. The limiting plates 7 are arranged on both sides of the material falling from the guiding pipe 63 to limit the material falling into the semi-circular frame one 64 by the limiting rod 7.

[0050] In a further solution provided by the present invention, a waste water pipe 81 is connected to the blanking port of the reaction furnace body 13. A secondary treatment tank 82 is connected to the waste water pipe 81, and a kinetic energy unit is provided on the secondary treatment tank 82.

[0051] Specifically, the kinetic energy unit includes a driving rotating rod 91 rotatably connected to the secondary treatment tank 82. A connecting frame 92 is fixedly connected to the driving rotating rod 91. The connecting frame 92 is fixedly connected to the semi-circular frame one 64. The driving rotating rod 91 is connected to an external power supply and a control switch. The driving rotating rod 91 drives the semi-circular frame one 64 to rotate in the semi-circular frame two 65 through the connecting frame 92, so as to supply materials to different reaction furnace bodies 13.

[0052] A desorption method for fluorine-containing waste activated carbon, the using method of which is as described in the above-mentioned regeneration and desorption system for fluorine-containing waste activated carbon. The activated carbon desorption and regeneration method includes the following steps:

[0053] S1: Pour the fluorine-containing waste activated carbon into the crushing cylinder 61 for crushing, and then convey the crushed fluorine-containing waste activated carbon powder into the reaction furnace body 13 through a conveying mechanism. Add salt or an alkaline substance, introduce an inert gas, and carry out a high-temperature melting reaction for regeneration.

[0054] S2: After the reaction is completed, cool it to obtain a mixture of alkali or salt and activated carbon. Add water to the reaction furnace body 13 to dissolve and filter the mixture to obtain activated carbon and a salt solution. The salt solution enters the secondary treatment tank 82 for further treatment.

[0055] S3: Start the reaction furnace body 13 again to dry the remaining activated carbon to obtain regenerated activated carbon.

[0056] Working principle: During operation, the fluorine-containing waste activated carbon to be processed is poured into the crushing cylinder. The fluorine-containing waste activated carbon powder after being crushed by the crushing cylinder is conveyed by the conveying auger 62, enters the semi-circular frame one 64 through the guiding pipe 63, and finally enters the reaction furnace body 13 along the feeding pipe 66 connected to the semi-circular frame two 65. Meanwhile, salt or alkali substances are added to the reaction furnace body 13 for reaction. While the reaction is taking place, the reaction furnace body 13 rotates. When the space between the storage component arranged on the reaction furnace body 13 and the partition plate 14 moves to the bottommost part, the receiving plate 22 moves to fit the inner wall of the reaction furnace body 13. At this time, the space between the receiving plate 22 and the partition plate 14 is exposed to receive the mixture at the bottommost part and drive it to rotate. During the rotation process, the arc-shaped plate 31 blocks the mixture until it rotates to a certain angle, and the mixture will leak out from the filtering holes 32 on the arc-shaped plate 31. When the receiving component moves to the highest point, the unagglomerated mixture leaks out from the filtering holes 32, while the agglomerated mixture is intercepted on the arc-shaped plate 31 when it rotates. At this time, the connecting rod 21 connected to the receiving plate 22 will move from the large-diameter arc part of the track groove 42 to the small-diameter arc part, driving the receiving plate 22 to approach the arc-shaped plate 31, so as to squeeze and crush the agglomerated mixture therein, so that the agglomerated mixture can be broken and then discharged from the filtering holes 32 on the arc-shaped plate 31. After discharging, the receiving plate 22 moves to the scraping plate 51, and the scraping plate 51 is used to clean the top of the partition plate 14 and the surface of the receiving plate 22.

[0057] Only certain exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A regeneration and desorption system for fluorine-containing waste activated carbon, comprising a support platform (1), characterized in that: A fixed disk (11) is rotatably connected to the support platform (1). A bottom plate (12) is connected to the support platform (1) through an electric telescopic rod. A reaction furnace body (13) is rotatably connected to the bottom plate (12). A plurality of partition plates (14) are fixedly connected in the reaction furnace body (13). A storage component is arranged between every two adjacent partition plates (14); It further includes a limiting component, which is arranged on the fixed disk (11); It further includes a driving component, which is arranged on the bottom plate (12); When the reaction furnace body (13) rotates to drive the fluorine-containing waste activated carbon at the bottom layer to move and enter the limiting component for screening and lifting, the storage component moves under the action of the driving component to roll and crush the agglomerated fluorine-containing waste activated carbon, and then a scraping unit cleans the surface of the storage component; The storage component includes a connecting rod (21) slidably connected to the reaction furnace body (13); A receiving plate (22) is fixedly connected to the connecting rod (21). Side plates (23) are slidably connected to the interiors on both sides of the receiving plate (22). The two side plates (23) are both connected to the interior of the receiving plate (22) through a first spring (24). An elastic cord (25) is arranged between each receiving plate (22) and the reaction furnace body (13); The limiting component includes an arc-shaped plate (31) fixedly connected to the fixed disk (11). A plurality of filter holes (32) are formed in the arc-shaped plate (31). The plurality of partition plates (14) contact the arc-shaped plate (31) during their movement strokes; The driving component includes an auxiliary ring (41) fixedly connected to the bottom plate (12). A track groove (42) is formed in the auxiliary ring (41). The plurality of connecting rods (21) are all slidably connected in the track groove (42). The track groove (42) is formed by splicing two arc-shaped grooves into a complete closed loop, and the connection at the head and tail of the two arc-shaped grooves is set to be inclined.

2. The regeneration and desorption system for fluorine-containing waste activated carbon according to claim 1, wherein, The scraping unit includes a scraping plate (51) slidably connected in the arc-shaped plate (31). The scraping plate (51) is connected to the inner wall of the arc-shaped plate (31) through a second spring (52).

3. A regeneration and desorption system for fluorine-containing waste activated carbon according to claim 1, wherein It further includes a crushing cylinder (61), and the crushing cylinder (61) is communicated with the reaction furnace body (13) through a conveying mechanism; The conveying mechanism includes a conveying auger (62) communicated at the discharging end of the crushing cylinder. A guiding pipe (63) is rotatably connected to the discharging pipe (66) of the conveying auger (62). A semi-circular frame one (64) is communicated with the guiding pipe (63). A semi-circular frame two (65) is rotatably connected to the semi-circular frame one (64). The semi-circular frame two (65) is communicated with the reaction furnace body (13) through the discharging pipe (66).

4. A regeneration and desorption system for fluorine-containing waste activated carbon according to claim 3, characterized in that, An auxiliary component is arranged in the semi-circular frame one (64), and the auxiliary component includes two limiting plates (7) fixedly connected to the semi-circular frame one (64).

5. A regeneration and desorption system for fluorine-containing waste activated carbon according to claim 3, characterized in that, A wastewater pipe (81) is communicated at the discharging port of the reaction furnace body (13). A secondary treatment tank (82) is communicated with the wastewater pipe (81). A kinetic energy unit is arranged on the secondary treatment tank (82).

6. The regeneration and desorption system for fluorine-containing waste activated carbon according to claim 5, characterized in that, The kinetic energy unit includes a driving rotating rod (91) rotatably connected to the secondary treatment tank (82), a connecting frame (92) fixedly connected to the driving rotating rod (91), and the connecting frame (92) is fixedly connected to the first semi-circular frame (64).

7. A desorption method for fluorine-containing waste activated carbon, which uses the regeneration and desorption system for fluorine-containing waste activated carbon described in any one of claims 1-6, characterized in that, The activated carbon desorption and regeneration method includes the following steps: S1: Pour the fluorine-containing waste activated carbon into the crushing cylinder (61) for crushing, and then convey the crushed fluorine-containing waste activated carbon powder to the reaction furnace body (13) through a conveying mechanism. Add salt or an alkaline substance, introduce an inert gas, and carry out a high-temperature melting reaction for regeneration; S2: After the reaction is completed, cool to obtain a mixture of alkali or salt and activated carbon. Add water to the reaction furnace body (13) to dissolve and filter the mixture to obtain activated carbon and a salt solution. The salt solution enters the secondary treatment tank (82) for further treatment; S3: Start the reaction furnace body (13) again to dry the remaining activated carbon to obtain regenerated activated carbon.

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