Counterflow continuous primary regeneration integrated drying drum
By using a counter-current continuous integrated drying drum with segmented heating and preheating sleeve design, the problem of recycled material sticking to the drum wall is solved, achieving efficient heating and drying, reduced energy consumption, and improved recycling ratio and heating efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 廊坊德基机械科技有限公司
- Filing Date
- 2025-06-06
- Publication Date
- 2026-05-29
AI Technical Summary
Recycled materials tend to stick to the drum wall during heating, resulting in low heating and drying efficiency and increased energy consumption, which limits the increase in the proportion of recycled materials added.
The system adopts a counter-current continuous integrated drying drum for primary and recycled aggregates. It heats primary aggregates, recycled coarse materials, and recycled fine materials in stages, using a combination of counter-current hot air and high-temperature flame to avoid sticking to the wall. The recycled fine materials are preheated by a preheating sleeve to improve heat utilization.
The proportion of recycled materials added to the mixture is increased, heating and drying efficiency is improved and energy consumption is reduced, and the material is ensured to form an effective material curtain in the drum, thereby improving heat utilization and heating efficiency.
Smart Images
Figure CN224299743U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of material mixing technology, specifically relating to a counter-current continuous original and regeneration integrated drying drum. Background Technology
[0002] During road maintenance and renovation, asphalt pavement materials can be recycled to obtain recycled materials. Mixing and drying the recycled materials with virgin materials yields a reusable virgin-recycled mixture. The use of recycled materials helps save raw materials and reduce solid waste, thereby lowering costs and improving environmental friendliness. Therefore, the industry has been committed to increasing the proportion of recycled materials added to mixtures.
[0003] As the proportion of recycled materials increases, the content of recycled fines also increases. Since recycled fines contain a large amount of asphalt, the adhesion of recycled materials to the drum wall and rake teeth during the heating process increases significantly. This results in the inability to form an effective material curtain inside the drum, leading to low heating and drying efficiency and increased energy consumption. These are key factors restricting the increase of the proportion of recycled materials and urgently need to be addressed. Utility Model Content
[0004] This utility model provides a counter-current continuous integrated drying drum for original and recycled materials, which aims to solve the problem of recycled materials sticking to the drum during heating, and improve the proportion of recycled materials added to the mixture and the heating and drying efficiency.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a counter-current continuous original and regeneration integrated drying drum, comprising:
[0006] The drum body is used to rotate around its own axis under the drive of external force to drive the material from its first end to its second end. The drum body includes a wind-heating section, a fire-heating section and a mixing section connected in sequence.
[0007] The burner is fixed at the second end and injects high-temperature flames into the heating section through the mixing section;
[0008] The front end of the hot air section is provided with a raw aggregate inlet, the front end of the hot air section is provided with a recycled coarse material inlet, the front end of the heat mixing section is provided with a recycled fine material inlet, and the rear end of the heat mixing section is provided with a mixed material outlet.
[0009] The inner wall of the mixing section is equipped with stirring blades. The stirring blades are used to stir the original aggregate, recycled coarse material and recycled fine material entering the mixing section during the rotation of the drum body, so as to heat and dry the high-temperature original aggregate and recycled coarse material and the low-temperature recycled fine material.
[0010] In one possible implementation, a ring of recycled fine material inlet is formed on the front peripheral wall of the mixing section, and a preheating sleeve is provided on the outer periphery of the hot section. A preheating annular cavity is formed between the preheating sleeve and the outer peripheral wall of the hot section. The preheating annular cavity is connected to the mixing section through the recycled fine material inlet, and a first feeding ring is provided at the front end of the preheating annular cavity. The first feeding ring is used to add recycled fine material into the preheating annular cavity.
[0011] In some embodiments, the inner circumferential wall of the preheating sleeve is provided with multiple rings of first feeding elements arranged in a crisscross pattern along its axial direction, and each ring of first feeding elements includes multiple feeding rakes that are spaced apart along the circumference of the preheating sleeve.
[0012] For example, the inner circumferential wall of the hot section has multiple rings of second material feeding components arranged in a crisscross pattern, and each ring of second material feeding components includes multiple material feeding rakes arranged circumferentially along the roller body; wherein, each rake tooth of the material feeding rake is connected to a scraping chain.
[0013] For example, the counter-current continuous original and regeneration integrated drying drum also includes a frame, and the drum body is rotatably connected to the frame; the first feeding ring is sleeved on the front outer periphery of the preheating sleeve and rotates with the preheating sleeve, the first feeding ring is fixedly connected to the frame and the top is provided with a first feeding hopper.
[0014] In one possible implementation, a first annular cavity is formed between the first feeding ring and the peripheral wall of the preheating sleeve, and a plurality of first material shovels are provided at intervals along the peripheral wall of the preheating sleeve. The first material shovels are used to scoop up the recycled fine material in the first annular cavity and sprinkle it into the preheating annular cavity when the drum body rotates.
[0015] In some embodiments, a second feeding ring is connected to the frame. The sealing ring of the second feeding ring is fitted around the front end of the hot section and rotates in cooperation with the drum body. A second annular cavity is formed between the second feeding ring and the peripheral wall of the hot section. The second annular cavity is connected to the hot section through a recycled coarse material inlet. A second feeding hopper for adding recycled coarse material is provided at the top of the second feeding ring.
[0016] For example, the outer peripheral wall of the hot section is provided with a plurality of second material shovels at intervals along its circumference. Each second material shovel is located in the second annular cavity and is used to shovel up the recycled coarse material in the second annular cavity and sprinkle it into the recycled coarse material inlet when the drum body rotates.
[0017] For example, the inner circumferential wall of the hot air section has multiple rings of lifting elements arranged in a crisscross pattern along its axial direction. Each ring of lifting elements includes multiple lifting plates that are spaced apart along the circumference of the drum body.
[0018] In some embodiments, a discharge box that rotates with the second end is sleeved thereon, and a mixture outlet is provided at the bottom of the discharge box; multiple material-pushing plates extending into the discharge box are distributed at intervals along the circumference of the second end, and each material-pushing plate is used to push the material in the discharge box into the mixture outlet when the drum body rotates.
[0019] The beneficial effects of the counter-current continuous integrated drying drum provided by this utility model are as follows: Compared with the prior art, the counter-current continuous integrated drying drum of this utility model provides a sealed drying space and drives the material to move from the first end to the second end by rotating. In addition, the material can be continuously tumbled and evenly heated under the rotation of the drum body during the movement, thus serving as a basic condition to ensure the heating efficiency of the material.
[0020] The raw aggregate enters the hot air section through the raw aggregate inlet. Since the high-temperature flame of the burner is sprayed from the second end to the first end, although the high-temperature flame is in the hot air section, the hot air section will receive countercurrent hot air in the opposite direction of the movement of the raw aggregate. This allows the raw aggregate to be heated and dried by the countercurrent hot air during the process of passing through the hot air section.
[0021] The recycled aggregate is mixed into the virgin aggregate after it has been heated in the hot section through the recycled aggregate inlet at the front end of the hot section. It then passes through the hot section together with the virgin aggregate to be heated and dried by the high-temperature flame. Although the recycled aggregate has a low asphalt content and exhibits low viscosity at high temperatures, it avoids the problem of the recycled aggregate sticking to the inner wall of the hot section because it is mixed with the virgin aggregate and achieves a tumbling and mixing effect based on the rotation of the drum body.
[0022] The recycled fine aggregate has a high asphalt content, so it enters the mixing and heating section directly from the recycled fine aggregate inlet. It is then mixed with the virgin aggregate and recycled coarse aggregate, which have been heated to a high temperature. As the drum body rotates, the mixing blades continuously tumble and scatter the virgin aggregate, recycled coarse aggregate, and recycled fine aggregate to mix them evenly. This allows the high temperature of the virgin aggregate and recycled coarse aggregate to heat and dry the recycled fine aggregate. Since the mixing and heating section is located in a sheltered and fire-resistant area, the temperature inside the mixing and heating section is relatively low. This avoids the recycled fine aggregate from becoming too hot and sticking to the wall due to high viscosity.
[0023] By adding virgin aggregate, recycled coarse material, and recycled fine material into the drum body in stages for drying in the manner described above, the problem of sticking to the wall can be avoided. This ensures that the material forms an effective material curtain during the rotation of the drum body. This not only helps to increase the proportion of recycled material added to the mixture, but also helps to improve the heat utilization rate of the high-temperature flame injected by the burner and the heat generated by the countercurrent hot air, thereby improving the heating and drying efficiency and reducing energy consumption. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the structure of a counter-current continuous original and regeneration integrated drying drum provided in one embodiment of the present utility model;
[0025] Figure 2A schematic diagram of the structure of a counter-current continuous original and regeneration integrated drying drum provided in another embodiment of this utility model;
[0026] Figure 3 For along Figure 2 Schematic diagram of the cross-sectional structure of the middle AA line and BB line;
[0027] Figure 4 For along Figure 2 Schematic diagram of the cross-sectional structure of the CC line and DD line;
[0028] Figure 5 For along Figure 2 Schematic diagram of the cross-sectional structure of the EE line;
[0029] Figure 6 For along Figure 2 Schematic diagram of the cross-sectional structure of the FF line.
[0030] In the diagram: 10. Drum body; 101. First end; 102. Second end; 11. Heating section; 111. Raw aggregate inlet; 112. Lifting plate; 12. Heating section; 121. Recycled coarse material inlet; 13. Mixing section; 131. Recycled fine material inlet; 132. Mixed material outlet; 133. Stirring blades; 14. Discharge box; 15. Pushing plate; 20. Burner; 30. Preheating sleeve; 300. Preheating annular cavity; 31. First feeding ring; 311. First feeding hopper; 312. First annular cavity; 313. First shovel; 32. Pushing rake; 321. Scraper chain; 40. Frame; 50. Second feeding ring; 500. Second annular cavity; 51. Second feeding hopper; 52. Second shovel. Detailed Implementation
[0031] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0032] It should be noted that when an element is referred to as being "set on" or "connected to" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.
[0033] Please refer to the following: Figures 1 to 6 The present invention provides a description of a counter-current continuous integrated drying drum for raw and recycled materials. The counter-current continuous integrated drying drum for raw and recycled materials includes a drum body 10 and a burner 20. The drum body 10 is used to rotate around its own axis under external force to move materials from its first end 101 to its second end 102. The drum body 10 includes a wind-heating section 11, a fire-heating section 12, and a mixing section 13 connected in sequence. The burner 20 is fixed to the second end 102 and passes through the mixing section 13 to spray high-temperature flames into the fire-heating section 12. The front end of the wind-heating section 11, serving as the first end 101, is provided with a raw aggregate inlet 1. 11. The front peripheral wall of the heating section 12 is provided with a recycled coarse material inlet 121, the front peripheral wall of the mixing section 13 is provided with a recycled fine material inlet 131, and the rear end of the mixing section 13, as the second end 102, is provided with a mixed material outlet 132; wherein, the inner peripheral wall of the mixing section 13 is provided with stirring blades 133, which are used to stir the original aggregate, recycled coarse material and recycled fine material entering the mixing section 13 during the rotation of the drum body 10, so as to heat and dry the low temperature recycled fine material by heating the high temperature original aggregate and recycled coarse material.
[0034] It should be noted that the power source for the drum body 10 can be a drive motor located at its first end 101 and second end 102, respectively. Drive gears are sleeved on the motor shafts of both drive motors, and gear rings that mesh with the drive gears are sleeved on the parts of the drum body 10 near its two ends. The drive motor drives the drive gears to rotate, which in turn drives the gear rings to rotate, thereby realizing the rotational movement of the drum body 10.
[0035] It should be understood that the effect of conveying the material inside the roller body 10 from the first end 101 to the second end 102 can be achieved based on the spiral blades provided on its inner wall, or based on the vertical inclination of its own axis so that the first end 101 is higher than the second end 102. Of course, it can also be achieved by combining the first end 101 being higher than the second end 102 with the spiral blades on its inner wall. No specific limitation is made here.
[0036] The heating principle of the air-heating section 11, the fire-heating section 12 and the mixing section 13 in this embodiment is as follows: the burner 20 sprays high-temperature flames through the mixing section to the fire-heating section 12. In this way, the high-temperature flames are located in the fire-heating section 12, and the high-temperature hot air generated by the high-temperature flames sprayed by the burner 20 flows from the fire-heating section 12 to the air-heating section 11. The high-temperature hot air moves in the opposite direction to the original aggregate entering the air-heating section 11. Thus, the high-temperature hot air is used to achieve countercurrent heating and drying of the original aggregate.
[0037] The hot section 12 directly utilizes the high temperature of the flame to generate heat radiation on the raw aggregate and recycled coarse material entering it, thereby further heating and drying the raw aggregate after air heating, and simultaneously heating and drying the recycled coarse material. After passing through the hot section 12, the raw aggregate and recycled coarse material reach a high temperature (180~200℃).
[0038] The mixing section 13 has no high-temperature flame or hot air. Therefore, the main function of this area is to mix and exchange heat with the high-temperature original aggregate and recycled coarse aggregate, so that the recycled fine aggregate is heated and dried, and finally a mixture of original aggregate, recycled coarse aggregate and recycled fine aggregate is obtained at a temperature of about 150~160℃.
[0039] Compared with the prior art, the countercurrent continuous original and regeneration integrated drying drum provided in this embodiment provides a sealed drying space and drives the material to move from the first end 101 to the second end 102 by its rotation. In addition, the material can be continuously tumbled and evenly heated under the rotation of the drum body 10 during the movement, which serves as a basic condition to ensure the heating efficiency of the material.
[0040] The raw aggregate enters the hot air section 11 through the raw aggregate inlet 111. Since the high-temperature flame of the burner 20 is sprayed from the second end 102 toward the first end 101, although the high-temperature flame is in the hot air section 12, the hot air section 11 will receive countercurrent hot air opposite to the direction of movement of the raw aggregate, so that the raw aggregate is heated and dried by the countercurrent hot air during the process of passing through the hot air section 11.
[0041] The recycled coarse material is mixed into the virgin aggregate after it has been heated by the hot air section 11 through the recycled coarse material inlet 121 at the front end of the hot section 12. It then passes through the hot section 12 together with the virgin aggregate to obtain the heating and drying effect of the high temperature flame. Since the recycled coarse material has a low asphalt content, although it will have low viscosity at high temperature, the recycled coarse material is mixed in with the virgin aggregate and obtains a tumbling and stirring effect based on the rotation of the drum body 10. Therefore, the problem of the recycled coarse material sticking to the inner wall of the hot section 12 can be avoided.
[0042] The recycled fine aggregate has a high asphalt content, so it enters the mixing and heating section 13 directly from the recycled fine aggregate inlet 131. It is then mixed with the virgin aggregate and recycled coarse aggregate that have been heated to a high temperature. During the rotation of the drum body 10, the mixing blades 133 continuously turn over and scatter the virgin aggregate, recycled coarse aggregate and recycled fine aggregate to mix them evenly. This allows the high temperature of the virgin aggregate and recycled coarse aggregate to heat and dry the recycled fine aggregate. Since the mixing and heating section 13 is located in a sheltered and fire-resistant area, the temperature inside the mixing and heating section 13 is relatively low. This avoids the problem of the recycled fine aggregate sticking to the wall due to excessively high temperature and high viscosity.
[0043] By adding virgin aggregate, recycled coarse material, and recycled fine material into the drum body 10 in stages for drying in the manner described above, the problem of sticking to the wall can be avoided. This ensures that the material forms an effective material curtain during the rotation of the drum body 10. This not only helps to increase the proportion of recycled material added to the mixture, but also helps to improve the heat utilization rate of the high-temperature flame injected by the burner 20 and the heat generated by the countercurrent hot air, thereby improving the heating and drying efficiency and reducing energy consumption.
[0044] In some embodiments, combined with Figure 2 , Figure 4 and Figure 6 It is understood that a recycled fine material inlet 131 is formed on the front peripheral wall of the mixing section 13, and a preheating sleeve 30 is provided on the outer periphery of the heating section 12. A preheating annular cavity 300 is formed between the preheating sleeve 30 and the outer peripheral wall of the heating section 12. The preheating annular cavity 300 is connected to the mixing section 13 through the recycled fine material inlet 131, and a first feeding ring 31 is provided at the front end of the preheating annular cavity 300. The first feeding ring 31 is used to add recycled fine material into the preheating annular cavity 300.
[0045] By setting the preheating sleeve 30, a preheating annular cavity 300 can be formed between it and the outer peripheral wall of the heating section 12. The recycled fine material first enters the preheating annular cavity 300 and is preheated by the heat transferred from the heating section 12. This not only avoids the recycled fine material being heated directly inside the drum body 10, which would cause it to overheat and stick to the wall, but also makes full use of the heat of the peripheral wall of the heating section 12, improving the thermal energy utilization rate and helping to reduce energy consumption. After being preheated in the preheating annular cavity 300, the recycled fine material can reach a temperature of 100~110°C and enter the mixing section 13 through the recycled fine material inlet 131. In the mixing section 13, it is heated and dried again by the recycled coarse material and the original aggregate at a higher temperature. This avoids the situation where the recycled fine material enters the mixing section 13 directly in a cold state and cannot be fully heated and dried.
[0046] In addition, by using the preheating sleeve 30 to form a preheating annular cavity 300 around the hot section 12 to preheat the recycled fine material in advance, compared with the method of directly using the recycled fine material as cold material into the mixing and heating section 13, it can not only improve the drying effect of the recycled fine material, but also shorten the length of the mixing and heating section 13, thereby reducing equipment costs and improving drying efficiency.
[0047] As a modified embodiment of the preheating sleeve 30 described above, please refer to Figure 4 The inner circumferential wall of the preheating sleeve 30 is arranged with multiple rings of first material-pushing elements intersecting along its axial direction. Each ring of first material-pushing elements includes multiple material-pushing rakes 32 spaced apart circumferentially along the preheating sleeve 30. By setting the material-pushing rakes 32, the recycled fine material can be continuously agitated as the preheating sleeve 30 rotates with the drum body 10. This not only prevents the recycled fine material from accumulating and sticking to the wall, but also allows the recycled fine material to continuously move towards the recycled fine material inlet 131 within the preheating annular cavity 300 by utilizing the arrangement of the material-pushing rakes 32, thereby achieving continuous and uniform feeding of the recycled fine material into the mixing section 13.
[0048] For some possible implementations, please refer to [link / reference]. Figure 3 The inner circumferential wall of the hot section 12 is arranged with multiple rings of second material feeding components at intervals. Each ring of second material feeding components includes multiple material feeding rakes 32 that are spaced apart along the circumference of the roller body 10. Each tooth of the material feeding rake 32 is connected to a scraping chain 321.
[0049] The hot section 12 adopts the same material feeding structure as the preheating ring cavity 300. That is, by using several material feeding rakes 32 distributed on its inner wall, the bottom material can be picked up during the rotation of the drum body 10 and scattered when it rotates to a high position. This allows the original aggregate and recycled coarse material to be continuously scattered in the hot section 12 to form a uniform material curtain, thereby improving the heating efficiency of the high temperature flame.
[0050] Considering that the recycled coarse material contains a small amount of asphalt, it will exhibit low viscosity when heated to a high temperature. Therefore, a scraper chain 321 is installed on the rake teeth. When the rake 32 rotates with the drum body 10 to different positions, the scraper chain 321 is always suspended due to its own weight. Therefore, the scraper chain 321 can form a scraping action on the rake teeth, thereby preventing the recycled coarse material from sticking to the rake teeth.
[0051] Of course, for the recycled fine material in the preheating ring cavity 300, although its asphalt content is high, it also exhibits low viscosity characteristics due to the low heating temperature in the preheating ring cavity 300. On this basis, the problem of recycled fine material sticking to the material scraping rake 32 can also be avoided by using the scraping chain 321 on each of its material scraping rakes 32.
[0052] It should be noted that, as Figure 2 As shown, the above-mentioned countercurrent continuous original and regeneration integrated drying drum also includes a frame 40, and the drum body 10 is rotatably connected to the frame 40; the first feeding ring 31 is sleeved on the outer periphery of the front end of the preheating sleeve 30 and rotatably cooperates with the preheating sleeve 30, the first feeding ring 31 is fixedly connected to the frame 40 and the top is provided with a first feeding hopper 311.
[0053] The frame 40 serves as the mounting base for the roller body 10 and is used to fix and support it on the ground. Specifically, the roller body 10 and the frame 40 can be rotated by fitting at least two ring rails along its axial direction onto the roller body 10, and setting a set of support rollers on the frame 40 corresponding to each ring rail. The rotational support of the roller body 10 is achieved by the cooperation of the support rollers and the ring rails.
[0054] Since the preheating sleeve 30 rotates with the drum body 10, the first feeding ring 31 is set to engage with the preheating sleeve 30 to achieve continuous feeding during movement. Specifically, after the recycled fine material is added to the first feeding hopper 311, it can continuously enter the preheating ring cavity 300 during the rotation of the preheating sleeve 30.
[0055] Specifically, please refer to Figure 2 and Figure 6 In this embodiment, a first annular cavity 312 is formed between the first feeding ring 31 and the peripheral wall of the preheating sleeve 30, and a plurality of first material shovels 313 are provided at intervals along the peripheral wall of the preheating sleeve 30. The first material shovels 313 are used to shovel up the recycled fine material in the first annular cavity 312 and sprinkle it into the preheating annular cavity 300 when the drum body 10 rotates.
[0056] The first feeding ring 31 and the preheating sleeve 30 form a first annular cavity 312. The recycled fine material added to the first feeding hopper 311 can fall into the first annular cavity 312. Then, the first material shovel 313, which moves with the preheating sleeve 30, continuously shovels up the recycled fine material at the bottom of the first annular cavity 312 and throws it into the preheating annular cavity 300 when it moves to a high position. This improves the uniformity of feeding in the preheating annular cavity 300 and avoids the accumulation and blockage of recycled fine material in the preheating annular cavity 300.
[0057] In some embodiments, see Figure 2 and Figure 5 A second feeding ring 50 is connected to the frame 40. The sealing ring of the second feeding ring 50 is sleeved on the outer periphery of the front end of the hot section 12 and rotates in cooperation with the drum body 10. A second annular cavity 500 is formed between the second feeding ring 50 and the peripheral wall of the hot section 12. The second annular cavity 500 is connected to the hot section 12 through the recycled coarse material inlet 121. A second feeding hopper 51 for adding recycled coarse material is provided on the top of the second feeding ring 50.
[0058] The principle of adding recycled coarse material into the heating section 12 using the second feeding ring 50 is the same as the principle of adding recycled fine material into the preheating ring cavity 300 using the first feeding ring 31. Specifically, the recycled coarse material is added to the second feeding hopper 51 and then enters the second ring cavity 500, and then falls from the second ring cavity 500 into the recycled coarse material inlet 121, thereby realizing continuous feeding of the heating section 12 in motion.
[0059] Specifically, such as Figure 5 As shown, multiple second shovels 52 are distributed circumferentially along the outer peripheral wall of the aforementioned hot section 12. Each second shovel 52 is located within the second annular cavity 500, and the second shovels 52 are used to scoop up the recycled coarse material in the second annular cavity 500 and sprinkle it into the recycled coarse material inlet 121 when the drum body 10 rotates. As the second shovels 52 move with the drum body 10, they can continuously scoop up the recycled coarse material in the second annular cavity 500, and then sprinkle the recycled coarse material into the recycled coarse material inlet 121 when they move to the high position of the second annular cavity 500. This can improve the feeding uniformity of the hot section 12, and also help the recycled coarse material to form a uniform material curtain in the hot section 12, thereby promoting the improvement of heating efficiency.
[0060] As one specific implementation of the aforementioned wind-heat section 11, please refer to Figures 1 to 3 The inner circumferential wall of the hot air section 11 has multiple rings of lifting elements arranged axially. Each ring of lifting elements includes multiple lifting plates 112 spaced apart circumferentially along the drum body 10. The lifting plates 112 are arranged in a spiral pattern on the inner wall of the hot air section 11 based on the axial cross and circumferential uniform distribution. This allows the material to be continuously lifted and scattered during the rotation of the drum body 10 to form a uniform material curtain, thereby improving the contact between the raw aggregate and the countercurrent hot air and thus improving the heating and drying efficiency.
[0061] In some embodiments, please refer to Figure 1 and Figure 2 The second end 102 is fitted with a discharge box 14 that rotates with it, and the bottom of the discharge box 14 is provided with a mixture outlet 132; the second end 102 is provided with a plurality of material-pushing plates 15 that extend into the discharge box 14 at intervals along its circumference, and each material-pushing plate 15 is used to push the material in the discharge box 14 into the mixture outlet 132 when the drum body 10 rotates.
[0062] If the second end 102 is directly open and serves as the mixture outlet 132, it will affect the airtightness of the drum body 10, resulting in a large amount of heat loss. Therefore, a discharge box 14 is provided to be fitted with the second end 102. The mixture can be directly entered into the discharge box 14 from the drum body 10 and then discharged from the mixture outlet 132 at the bottom of the discharge box 14. In order to avoid the mixture from accumulating in the discharge box 14, a material guide plate 15 is provided on the second end 102 to rotate with the drum body 10, thereby continuously agitating the mixture entering the discharge box 14 and improving the discharge efficiency.
[0063] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A counter-current continuous integrated drying drum for original and regeneration, characterized in that, include: The drum body is used to rotate around its own axis under the drive of external force to move the material from its first end to its second end. The drum body includes a wind-heating section, a fire-heating section and a mixing section connected in sequence. A burner, fixed to the second end, injects a high-temperature flame through the mixing section into the heating section; The front end of the air-heat section, serving as the first end, is provided with a raw aggregate inlet; the front peripheral wall of the hot section is provided with a recycled coarse material inlet; the front peripheral wall of the mixing section is provided with a recycled fine material inlet; and the rear end of the mixing section, serving as the second end, is provided with a mixed material outlet. The inner peripheral wall of the mixing section is provided with stirring blades. The stirring blades are used to stir the original aggregate, recycled coarse material and recycled fine material entering the mixing section during the rotation of the drum body, so as to heat and dry the high-temperature original aggregate and recycled coarse material and the low-temperature recycled fine material.
2. The counter-current continuous integrated drying drum for original and regeneration as described in claim 1, characterized in that, The front end of the mixing section has a ring of recycled fine material inlet, and the outer periphery of the hot section is fitted with a preheating sleeve. The preheating sleeve and the outer periphery of the hot section form a preheating annular cavity. The preheating annular cavity is connected to the mixing section through the recycled fine material inlet, and the front end of the preheating annular cavity is provided with a first feeding ring for adding the recycled fine material into the preheating annular cavity.
3. The counter-current continuous original and regeneration integrated drying drum as described in claim 2, characterized in that, The inner circumferential wall of the preheating sleeve has multiple rings of first feeding elements arranged intersectingly along its axial direction. Each ring of first feeding elements includes multiple feeding rakes that are spaced apart circumferentially along the preheating sleeve.
4. The counter-current continuous integrated drying drum for original and regeneration as described in claim 3, characterized in that, The inner circumferential wall of the hot section is provided with multiple rings of second material feeding components arranged in a crisscross pattern. Each ring of second material feeding components includes multiple material feeding rakes arranged circumferentially along the roller body. Each tooth of the material feeding rake is connected to a scraping chain.
5. The counter-current continuous integrated drying drum for original and regeneration as described in claim 2, characterized in that, The counter-current continuous original and regeneration integrated drying drum also includes a frame, and the drum body is rotatably connected to the frame; the first feeding ring is sleeved on the outer periphery of the front end of the preheating sleeve and rotatably cooperates with the preheating sleeve, the first feeding ring is fixedly connected to the frame and a first feeding hopper is provided at the top.
6. The counter-current continuous integrated drying drum for original and regeneration as described in claim 5, characterized in that, A first annular cavity is formed between the first feeding ring and the peripheral wall of the preheating sleeve, and a plurality of first material shovels are provided at intervals along the peripheral wall of the preheating sleeve. The first material shovels are used to scoop up the recycled fine material in the first annular cavity and sprinkle it into the preheating annular cavity when the drum body rotates.
7. The counter-current continuous integrated drying drum for original and regeneration as described in claim 5, characterized in that, A second feeding ring is connected to the frame. The sealing ring of the second feeding ring is sleeved on the outer periphery of the front end of the hot section and rotates in cooperation with the drum body. A second annular cavity is formed between the second feeding ring and the peripheral wall of the hot section. The second annular cavity is connected to the hot section through the recycled coarse material inlet. A second feeding hopper for adding the recycled coarse material is provided at the top of the second feeding ring.
8. The counter-current continuous integrated drying drum for original and regeneration as described in claim 7, characterized in that, The outer peripheral wall of the hot section is provided with a plurality of second material shovels distributed at intervals along its circumference. Each second material shovel is located in the second annular cavity and is used to scoop up the recycled coarse material in the second annular cavity and sprinkle it into the recycled coarse material inlet when the drum body rotates.
9. The counter-current continuous integrated drying drum for original and regeneration as described in claim 1, characterized in that, The inner circumferential wall of the air-heat section has multiple rings of lifting elements arranged intersectingly along its axial direction. Each ring of lifting elements includes multiple lifting plates spaced apart circumferentially along the drum body.
10. The counter-current continuous integrated drying drum for original and regeneration as described in any one of claims 1-9, characterized in that, The second end is fitted with a discharge box that rotates with it, and the bottom of the discharge box is provided with the mixture outlet; the second end is provided with a plurality of material-pushing plates that extend into the discharge box at intervals along its circumference, and each material-pushing plate is used to push the material in the discharge box into the mixture outlet when the roller body rotates.