Primary activation furnace for activated carbon production
By setting up a material separation detection mechanism and a guide structure at the bottom of the activated carbon activation furnace, the agglomeration phenomenon of activated carbon is solved, and the uniform activation and efficient carbonization process of activated carbon is achieved.
Patent Information
- Application Number
- CN202421956912.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-13
AI Technical Summary
During the pre-carbonization process of existing activated carbon activation equipment, it is difficult to effectively solve the aggregation phenomenon of activated carbon, resulting in local agglomerations affecting the dryness and humidity of the overall product, increasing the difficulty of the carbonization process.
A first-stage activation furnace for activated carbon production is designed. By setting up a material separation detection mechanism at the bottom, the agglomerated activated carbon is pumped and split by a negative pressure tube, and output it through the reverse guide structure and the forward guide structure to ensure uniform activation of the activated carbon.
It effectively solves the agglomeration phenomenon of activated carbon, ensures uniform activation of activated carbon, avoids local agglomerations affecting the overall product quality, and reduces the difficulty of the carbonization process.
Smart Images
Figure CN222907555U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an activated carbon processing device, in particular to a primary activation furnace for activated carbon production. Background Art
[0002] Activated carbon is prepared by pyrolysis and activation processing of carbon-containing raw materials such as wood, coal, and petroleum coke. Activated carbon activation is one of the most important steps in the production of activated carbon. Activated carbon activation is generally divided into three main processes according to the temperature change in the thermal decomposition process: drying process, pre-carbonization process, and carbonization process. Different temperatures are applied in different action stages to precipitate different substances in the activated carbon and increase the fixed carbon content of the charcoal.
[0003] In the pre-carbonization of the existing activated carbon activation equipment, either the rotation of the activation furnace itself is used to promote the forward movement and turning of the activated carbon, or the piled activated carbon is stirred up and down by means of stirring to improve the contact effect between the activated carbon and the heat source. If this method is used to disperse the activated carbon, the precursor effect and stirring effect of the inclined cremation furnace are poor. Although it can partially increase the contact surface between the activated carbon and the hot surface, when local agglomeration of the activated carbon occurs, rotation and stirring only drive the agglomerates to change their positions and cannot break them up. The agglomeration phenomenon of the activated carbon still cannot be solved, and the local agglomerates will still move forward with a large amount of activated carbon until it affects the dryness and humidity of the overall product in the next crushing and filtering process, thus increasing the difficulty of the actual carbonization process. Summary of the Utility Model
[0004] The utility model provides a primary activation furnace for activated carbon production, which can extract the activated carbon at the bottom layer, split the agglomerated activated carbon after extraction, put it at the front end of the entire activation furnace body when it does not meet the requirements, and put the activated carbon that meets the requirements at the rear end position, so as to avoid both the whole group of activated carbon not meeting the requirements of pre-carbonization and the activated carbon that has achieved the pre-carbonization effect from being overheated, and can effectively solve the above problems.
[0005] The utility model is realized as follows:
[0006] A primary activation furnace for activated carbon production includes:
[0007] An inclined activation furnace, several gear rings are fixedly arranged on the outer side of the activation furnace, a driving seat meshing with the gear rings is arranged at the bottom of the activation furnace, a pre-drying cylinder is arranged at the front end of the activation furnace, and a receiving cylinder is arranged at the rear end of the activation furnace;
[0008] Material separation and detection mechanism. The slope of the material separation and detection mechanism is the same as that of the activation furnace. The material separation and detection mechanism includes a negative pressure pipe fixed between the material receiving cylinder and the pre-drying cylinder and penetrating the axial direction of the activation furnace. The negative pressure pipe is connected to an external negative pressure suction structure. A number of groups of material separation and detection belts are arranged at intervals on the negative pressure pipe. The negative pressure pipe extends upward to be provided with a communication pipe communicating with the top of the material separation and detection belt. A number of groups of reverse material guiding structures are arranged on the side of the material separation and detection belt close to the pre-drying cylinder, and a positive material guiding structure is arranged on the side of the material separation and detection belt close to the material receiving cylinder. The material separation and detection belt extends to the bottom of the activation furnace. When the external negative pressure suction structure generates suction, the negative pressure pipe sucks the activated carbon at the bottom of the activation furnace into the material separation and detection belt through the material separation and detection belt and discharges it through the reverse material guiding structure or the positive material guiding structure.
[0009] As a further improvement, the material separation and detection belt is divided into an upper material separation area and a lower material separation area. The temperature detector is arranged between the upper material separation area and the lower material separation area. The reverse material guiding structure and the positive material guiding structure are arranged on the side of the upper material separation area.
[0010] As a further improvement, the material separation and detection belt includes two annular belts attached to the inner side wall of the activation furnace. The bottoms of the two annular belts are connected by a lower hopper seat. The top positions of the two annular belts communicate with each other. The top of the annular belt communicates with the communication pipe.
[0011] As a further improvement, the lower hopper seat is an arc-shaped plate-like structure attached to the inner bottom of the activation furnace. The lower hopper seat is provided with an opening on the side close to the activated carbon feed.
[0012] As a further improvement, a cover cylinder is arranged at the top of the communication pipe. The diameter of the cover cylinder is smaller than the particle size of the activated carbon in the activation furnace. All the cover cylinders are connected by a reverse communication pipe.
[0013] As a further improvement, the reverse material guiding structure and the positive material guiding structure are equal in structural size. The reverse material guiding structure includes a cavity pipe fixed on the annular belt. A rotatable flap is arranged inside the cavity pipe. The driving structure of the flap is electrically connected to the temperature detector.
[0014] As a further improvement, the ends of all the cavity pipes are connected with a folded pipe. The folded pipe is of a similar L-shaped structure. The opening of the folded pipe faces downward.
[0015] The beneficial effects of the present utility model are:
[0016] In existing activation equipment, since the activation furnace needs to be maintained in a state of tilting downward and rotating, it is difficult to set up a rotating structure in the activation furnace. It can only rely on the rotation of the activation furnace itself to drive the activated carbon forward, so as to achieve the effect of uniform heating. Even if some stirring structures are forcibly installed, due to the inclined activation furnace, a large power cannot be operated, and thus the stirring effect is not good. Therefore, in the present utility model, a material distribution and detection mechanism is added. The material distribution and detection mechanism is connected and fixed through a negative pressure pipe, which can not only fix the material distribution and detection mechanism, but also provide power for the material distribution and detection mechanism. First of all, the material distribution and detection belt can intercept the activated carbon being transported at the bottom through the material distribution and detection belt, and suck it into the interior of the material distribution and detection belt through the negative pressure generated by the negative pressure pipe. Then, through the reverse material guiding structure and the forward material guiding structure, the activated carbon is output from the top position of the material distribution and detection belt. The activated carbon output from the top position of the material distribution and detection belt can fully contact with the steam, so that the activated carbon at the bottom can also be uniformly activated. Even if the impurities in the activated carbon precipitate and cause the activated carbon to become viscous, it can ensure that the activated carbon at the bottom is in a state of uniform activation.
[0017] During the suction process of the material distribution and detection belt, in order to reduce the suction difficulty of the activated carbon and also to fully collect the activated carbon at the bottom of the furnace body, the entire material distribution and detection belt is divided into three parts, including two annular belts and a lower hopper seat connecting the annular belts. The lower hopper seat is provided with an opening on the side facing the feed, so that a part of the activated carbon can be piled up in the lower hopper seat, which is convenient for the activated carbon to enter the annular belt from the lower hopper seat to form a good cycle.
[0018] In order to prevent a large amount of activated carbon from being sucked into the connecting pipe when the negative pressure pipe generates negative pressure on the material distribution and detection belt through the connecting pipe, the present utility model sets a cover cylinder on the top of the connecting pipe. Through the setting of the mesh number of the cover cylinder, negative pressure can be normally generated while preventing a large amount of activated carbon from being sucked in. And after the machine stops, the cover cylinder can be cleaned in the reverse direction through the reverse pipe to prevent the cover cylinder from being completely blocked.
[0019] Although the setting directions of the reverse material guiding structure and the forward material guiding structure are different, their structures and size ratios are exactly the same. And their starting methods are completely automatic starting methods. The flap controlling their opening and closing is closely related to the temperature detector, and the opening and closing of the flap are stage-based. For example, after a single batch of activated carbon is sucked in and discharged through the opening of the flap, the flap needs to be re-closed to continuously suck the activated carbon at the bottom of the furnace body. At the same time, the alternating method can play a good cycle.
[0020] To prevent steam from directly rushing into the reverse material guiding structure and the forward material guiding structure along the straight cavity tube, in the present utility model, a folded tube is provided at the end of the cavity tube to twist the direction of the dispersed activated carbon and avoid direct convection with the steam, thus preventing the activated carbon from being unable to fall downward. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.
[0022] Figure 1 is a schematic structural diagram (first perspective) of a primary activation furnace for activated carbon production according to the present utility model.
[0023] Figure 2 is a schematic structural diagram (second perspective) of a primary activation furnace for activated carbon production according to the present utility model.
[0024] Figure 3 is a three-dimensional structural diagram of the material distribution and detection mechanism according to the present utility model.
[0025] Figure 4 is the present utility model Figure 3 top view structural diagram.
[0026] Figure 5 is the present utility model Figure 4 sectional view taken along line A-A in the present utility model.
[0027] Figure 6 is a schematic structural diagram of the material distribution and detection belt, reverse material guiding structure, and forward material guiding structure according to the present utility model.
[0028] Figure 7 is the present utility model Figure 6 top view structural diagram.
[0029] Figure 8 is the present utility model Figure 7 sectional view taken along line B-B in the present utility model.
[0030] Figure 9 is the present utility model Figure 7 sectional view taken along line C-C in the present utility model.
[0031] Figure 10 is the present utility model Figure 9 enlarged view of area D in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
[0033] In the description of the present utility model, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.
[0034] Refer to Figures 1 to 10As shown in the figure, a primary activation furnace for the production of activated carbon includes an inclined activation furnace 10. A number of gear rings 11 are fixedly arranged on the outer side of the activation furnace 10. A driving seat 20 meshing with the gear rings 11 is arranged at the bottom of the activation furnace 10. A pre-drying cylinder 30 is arranged at the front end of the activation furnace 10. A receiving cylinder (not shown in the figure) is arranged at the rear end of the activation furnace 10. It is characterized in that the activation equipment further includes: a material distribution detection mechanism 50, the slope of the material distribution detection mechanism 50 is the same as that of the activation furnace 10. The material distribution detection mechanism 50 includes a negative pressure pipe 51 fixed between the receiving cylinder and the pre-drying cylinder 30 and penetrating the axial direction of the activation furnace 10. The negative pressure pipe 51 is communicated with an external negative pressure suction structure. A number of groups of material distribution detection belts 52 are arranged at intervals on the negative pressure pipe 51. A communication pipe 53 communicating with the top of the material distribution detection belts 52 extends upward from the negative pressure pipe 51. A number of groups of reverse material guiding structures 54 are arranged on the side of the material distribution detection belts 52 close to the pre-drying cylinder 30. A forward material guiding structure 55 is arranged on the side of the material distribution detection belts 52 close to the receiving cylinder. The material distribution detection belts 52 extend to the bottom of the activation furnace 10. When the external negative pressure suction structure generates suction, the negative pressure pipe 51 sucks the activated carbon at the bottom of the activation furnace 10 into the material distribution detection belts 52 through the material distribution detection belts 52 and discharges it through the reverse material guiding structure 54 or the forward material guiding structure 55; a temperature testing structure 60, including a retention component 61 arranged in the middle of the inner side of the material distribution detection belts 52. A temperature detector 62 is arranged on the passing surface of the retention component 61. The temperature detector 62 is electrically connected to the reverse material guiding structure 54 and the forward material guiding structure 55. When the activated carbon stays through the retention component 61, it is detected by the temperature detector 62. According to the data of the temperature detector 62, the opening and closing of the reverse material guiding structure 54 or the forward material guiding structure 55 are controlled.
[0035] In this embodiment, the activated carbon is input into the activation furnace 10 after being pre-dried by the pre-drying cylinder 30. Since the gear rings 11 outside the activation furnace 10 mesh with the driving seat 20, the activated carbon will gradually move towards the inner side of the activation furnace 10 under the slow rotation of the activation furnace 10. The activated carbon after being activated by the activation furnace 10 then enters the receiving cylinder.
[0036] Among them, the temperature inside the entire activation furnace 10 is between 270 and 280 °C. If the temperature of the activated carbon detected by the temperature detector 62 does not meet this condition, it will be immediately processed in reverse. The heat source of the activation furnace 10 in this embodiment is the heating method of the traditional activation furnace 10 in the prior art, so it will not be elaborated in this case.
[0037] In existing activation equipment, since the activation furnace 10 needs to be maintained in a state of tilting downward and rotating, it is difficult to set up a rotating structure in the activation furnace 10. It can only rely on the rotation of the activation furnace 10 itself to drive the activated carbon forward, so as to achieve the effect of uniform heating. Even if some stirring structures are forcibly installed, due to the inclined activation furnace 10, it is impossible to operate at a large power, and thus the stirring effect is not good. Therefore, in this embodiment, by adding a material distribution and detection mechanism 50, the material distribution and detection mechanism 50 is connected and fixed through a negative pressure pipe 51. This can not only fix the material distribution and detection mechanism 50, but also provide power for the material distribution and detection mechanism 50. First, the material distribution and detection belt 52 can intercept the activated carbon being transported at the bottom and suck it into the interior of the material distribution and detection belt 52 through the negative pressure generated by the negative pressure pipe 51. Then, through the reverse material guiding structure 54 and the forward material guiding structure 55, the activated carbon is output from the top position of the material distribution and detection belt 52. The activated carbon output from the top position of the material distribution and detection belt 52 can fully contact with the steam, so that the activated carbon at the bottom can also be evenly activated. Even if impurities in the activated carbon precipitate and cause the activated carbon to become viscous, it can still ensure that the activated carbon at the bottom is in a state of uniform activation.
[0038] The span of the entire material distribution and detection belt 52 is relatively large, but in fact it is only divided into two areas. The material distribution and detection belt 52 is divided into an upper material distribution area and a lower material distribution area. The temperature detector 62 is arranged between the upper material distribution area and the lower material distribution area. The reverse material guiding structure 54 and the forward material guiding structure 55 are arranged on the side of the upper material distribution area. The lower material distribution area only plays the role of feeding and storing materials. In fact, the material is discharged in the upper material distribution area.
[0039] During the suction process of the material distribution and detection belt 52, in order to reduce the suction difficulty of the activated carbon and also to fully collect the activated carbon at the bottom of the furnace body, the material distribution and detection belt 52 in this embodiment includes two annular belts 521 attached to the inner side wall of the activation furnace 10. The bottoms of the two annular belts 521 are connected by a lower hopper seat 522. The top positions of the two annular belts 521 communicate with each other. The top of the annular belt 521 communicates with the connecting pipe 53. The entire material distribution and detection belt 52 is divided into three parts, including two annular belts 521 and the lower hopper seat 522 connecting the annular belts 521. Preferably, the lower hopper seat 522 is an arc-shaped plate-like structure attached to the inner bottom of the activation furnace 10. The lower hopper seat 522 is open on the side close to the activated carbon inlet. The lower hopper seat 522 is open on the side facing the inlet, so that a part of the activated carbon can be piled up in the lower hopper seat 522, which is convenient for the activated carbon to enter the annular belt 521 from the lower hopper seat 522 to form a good cycle.
[0040] In order to prevent a large amount of activated carbon from being sucked into the connecting pipe 53 when the negative pressure pipe 51 generates negative pressure on the material distribution detection belt 52 through the connecting pipe 53, a hood cylinder 531 is provided at the top of the connecting pipe 53 in this embodiment. The diameter of the hood cylinder 531 is smaller than the particle size of the activated carbon in the activation furnace 10. All the hood cylinders 531 are connected through a reverse connection pipe 532. By providing the hood cylinder 531 at the top of the connecting pipe 53 and setting the mesh number of the hood cylinder 531, negative pressure can be generated normally while preventing a large amount of activated carbon from being sucked in. Moreover, after the machine stops, the hood cylinder 531 can be cleaned reversely through the reverse connection pipe 532 to prevent the hood cylinder 531 from being completely blocked. Among them, valves that can be opened and closed are provided on both the reverse connection pipe 532 and the negative pressure pipe 51, so that an independent pipeline can be formed for reverse pumping when reverse flushing is required.
[0041] During the process of sucking the activated carbon into the material distribution detection belt 52, it is actually necessary to judge the temperature of the activated carbon at this time. If it meets the requirements of primary carbonization, it can be continuously output. If it does not meet the requirements, the time in the furnace body needs to be extended. Therefore, a temperature detector 62 is provided at the middle position of the material distribution detection belt 52 in this utility model. The temperature detector 62 can detect the temperature of the sucked activated carbon. Since the temperature detector 62 is electrically connected to the reverse material guiding structure 54 and the forward material guiding structure 55, when the temperature detector 62 judges that the temperature is lower than the standard temperature, the reverse material guiding structure 54 is opened to let the activated carbon go back and extend the time of the activated carbon in the furnace body. If the temperature detector 62 judges that the temperature of the activated carbon meets the standard at this time, the forward material guiding structure 55 is opened to let the activated carbon pass forward and is located at the upper position of the activated carbon being transported to avoid mixing with the activated carbon at the bottom. Among them, the temperature detector 62 is a temperature sensor.
[0042] Although the setting directions of the reverse material guiding structure 54 and the forward material guiding structure 55 are different, their structures and size ratios are exactly the same, and their starting methods are completely automatic starting methods. Specifically, the structures of the reverse material guiding structure 54 and the forward material guiding structure 55 are of equal size. The reverse material guiding structure 54 includes a cavity pipe 541 fixed on the annular belt 521. A rotatable flap 542 is provided inside the cavity pipe 541. The driving structure of the flap 542 is electrically connected to the temperature detector 62. In this embodiment, the flap 542 that controls its opening and closing is closely related to the temperature detector 62, and the opening and closing of the flap 542 are staged. For example, after a single batch of activated carbon is sucked in and discharged through the opening of the flap 542, the flap 542 needs to be re-closed to continuously suck the activated carbon at the bottom of the furnace body. At the same time, the alternating method can play a good cycle.
[0043] To prevent steam from directly flushing into the reverse material guiding structure 54 and the forward material guiding structure 55 along the straight cavity tube 541, a folding tube 543 is connected to the end of each of the cavity tubes 541 in this embodiment. The folding tube 543 has a structure similar to an L shape, and the opening of the folding tube 543 faces downward. By providing the folding tube 543 at the end of the cavity tube 541, the direction of the dispersed activated carbon is twisted by the folding tube 543 to avoid direct convection with the steam, thereby preventing the activated carbon from failing to fall downward.
[0044] When the temperature detector 62 detects the activated carbon, if the activated carbon surges upward without any obstruction, it is likely to cause its flow rate to be too fast and all data cannot be accurately detected. Therefore, the present utility model provides a retention component 61 at the middle position of the material distribution and detection belt 52 to slow down the activated carbon passing through the retention component 61, reducing the speed of the activated carbon, so that the temperature detector 62 can effectively detect all the passing activated carbon. When it is found that there are non-conforming activated carbon in the same batch, it is sent back immediately to avoid part of the material affecting the quality of the whole batch. At the same time, the retention component 61 can also disperse the agglomerated materials. The whole mass of materials will be blocked by the retention component 61 and can only continue to move upward after being cut by the retention component 61, thus avoiding the aggregation of the whole mass of activated carbon.
[0045] Specifically, the retention component 61 includes two opposite retention frames 611 provided in the annular belt 521. An active roller 612 is provided inside the retention frame 611, and a barrier sheet 613 is provided on the active roller 612. The temperature detector 62 is embedded inside the retention frame 611. When the upward flowing activated carbon encounters the barrier sheet 613, it will be blocked by the barrier sheet 613, thereby reducing its passing speed. And the whole mass of activated carbon will be cut by the barrier sheet 613 when it touches the barrier sheet 613, and only a small part of the agglomerated activated carbon will squeeze and drive the active roller 612 to rotate, thus avoiding being stuck between the barrier sheets 613. Preferably, the barrier sheet 613 is a cutter with a downward-facing blade.
[0046] The above description is only the preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.
Claims
1. A primary activation furnace for producing activated carbon, characterized in that: include: An activation furnace (10) arranged at an angle, wherein a plurality of gear rings (11) are fixedly arranged on the outer side of the activation furnace (10), a driving seat (20) meshing with the gear rings (11) is arranged at the bottom of the activation furnace (10), a pre-drying cylinder (30) is arranged at the front end of the activation furnace (10), and a material receiving cylinder is arranged at the rear end of the activation furnace (10); The material distribution detection mechanism (50) has a slope that is the same as that of the activation furnace (10). The material distribution detection mechanism (50) comprises a negative pressure pipe (51) fixed between the material receiving cylinder and the pre-drying cylinder (30) and penetrating the axial direction of the activation furnace (10). The negative pressure pipe (51) is connected to an external negative pressure suction structure. A plurality of material distribution detection belts (52) are arranged on the negative pressure pipe (51) at intervals. The negative pressure pipe (51) is extended upward to form a connecting pipe (53) that is in communication with the top of the material distribution detection belt (52). A plurality of groups of reverse material guiding structures (54) are arranged on one side of the detection belt (52) close to the pre-drying cylinder (30), and a forward material guiding structure (55) is arranged on one side of the material distribution detection belt (52) close to the receiving cylinder. The material distribution detection belt (52) extends to the bottom of the activation furnace (10). When the external negative pressure suction structure generates suction, the negative pressure pipe (51) sucks the activated carbon at the bottom of the activation furnace (10) into the material distribution detection belt (52) through the material distribution detection belt (52) and discharges it through the reverse material guiding structure (54) or the forward material guiding structure (55).
2. The primary activation furnace for producing activated carbon according to claim 1, characterized in that: The material distribution detection belt (52) is divided into an upper material distribution area and a lower material distribution area, the temperature detector (62) is arranged between the upper material distribution area and the lower material distribution area, and the reverse material guide structure (54) and the forward material guide structure (55) are arranged on the side of the upper material distribution area.
3. The primary activation furnace for producing activated carbon according to claim 1, characterized in that: The material distribution detection belt (52) comprises two ring belts (521) attached to the inner wall of the activation furnace (10), the bottoms of the two ring belts (521) are connected via a lower bucket seat (522), the tops of the two ring belts (521) are interconnected, and the tops of the ring belts (521) are connected to the connecting pipe (53).
4. The primary activation furnace for producing activated carbon according to claim 3, characterized in that: The lower bucket seat (522) is an arc-shaped plate structure that fits on the inner bottom of the activation furnace (10), and the lower bucket seat (522) is arranged at an opening on one side close to the activated carbon feed.
5. The primary activation furnace for producing activated carbon according to claim 1, characterized in that: A cover tube (531) is provided at the top of the connecting pipe (53), the diameter of the cover tube (531) being smaller than the particle diameter of the activated carbon in the activation furnace (10), and all the cover tubes (531) are connected via a reverse pipe (532).
6. The primary activation furnace for producing activated carbon according to claim 3, characterized in that: The reverse material guiding structure (54) and the forward material guiding structure (55) are of equal size. The reverse material guiding structure (54) comprises a cavity tube (541) fixedly connected to the annular belt (521). A rotatable flap (542) is provided on the inner side of the cavity tube (541). The driving structure of the flap (542) is electrically connected to the temperature detector (62).
7. The primary activation furnace for producing activated carbon according to claim 6, characterized in that: The ends of all the lumens (541) are connected to a folding tube (543), and the folding tube (543) is an L-shaped structure, with the opening of the folding tube (543) facing downward.