Asphalt heat regeneration heating drum

Abstract

The application discloses asphalt heat regeneration heating roller, apply to asphalt equipment technical field, including four groups of support, heating roller, waste gas circulation mechanism and temperature detection mechanism, the heating roller is located on the support, the waste gas circulation mechanism is located at the left side top of heating roller, the temperature detection mechanism is located at the right side bottom of heating roller, the heating roller includes heating cylinder, feed cylinder, discharge cylinder and two groups of connecting joints, the inside of heating cylinder is sequentially provided with feed drying area, core heating area and temperature equalizing discharge area from feed cylinder to one side of discharge cylinder, the feed drying area is connected with feed cylinder, the discharge cylinder is connected with temperature equalizing discharge area, the fixed cylinder, a plurality of groups of lifting plates one, a plurality of sliding grooves and a plurality of groups of auxiliary lifting parts are arranged at the feed drying area, the auxiliary lifting part includes two groups of sliding blocks, two groups of springs, sliding frame, cross beam and lifting plate two, the application can avoid that waste asphalt mixture adheres to wall and forms stubborn clumps.

Description

Technical Field

[0001] This invention relates to the field of asphalt equipment technology, specifically to an asphalt thermal recycling heating drum. Background Technology

[0002] In the field of road construction material recycling technology, plant-mixed hot recycling is a key method for disposing of waste asphalt mixtures (RAP), and its core equipment is the asphalt hot recycling heating drum. This equipment achieves the heating and recycling of materials through heat exchange between hot air and the counter-flowing waste asphalt mixture.

[0003] However, in actual operation, the aged asphalt in the waste asphalt mixture softens upon heating in the initial stage, exhibiting high viscosity and easily adhering to the inner wall of the drum and the surface of the lifting plates in the low-temperature zone. As production continues, the adhesive layer accumulates and thickens, and after high-temperature carbonization, forms hard and stubborn "crust-like" lumps. These lumps not only severely hinder the normal lifting and axial conveying of materials within the drum, disrupting the formation of a uniform "material curtain," leading to decreased heat exchange efficiency and uneven heating; they also form a lumpy layer, generating thermal resistance, significantly reducing the heat conduction efficiency of the drum wall, and increasing energy consumption. Furthermore, to remove these lumps, frequent shutdowns for manual cleaning are necessary, greatly impairing the equipment's continuous operation capability and production economy. Currently, the industry mainly adopts passive, localized improvement measures, such as spraying an anti-stick coating on the drum wall or optimizing the lifting plate configuration. However, the anti-stick coating is prone to failure under long-term high-temperature and abrasive conditions, and the optimization of the lifting plates often fails to simultaneously meet the multiple requirements of anti-sticking, material conveying, and heat exchange efficiency.

[0004] Therefore, it is necessary to provide a heating roller for hot asphalt recycling to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a heating drum for hot asphalt recycling, which can prevent waste asphalt mixture from sticking to the wall and forming stubborn clumps, thereby improving the efficiency and stability of hot recycling equipment and solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an asphalt hot recycling heating drum, comprising four sets of supports, a heating drum, an exhaust gas circulation mechanism and a temperature detection mechanism, wherein the heating drum is located on the supports, the exhaust gas circulation mechanism is located at the top left side of the heating drum, and the temperature detection mechanism is located at the bottom right side of the heating drum; The heating drum includes a heating cylinder, a feeding cylinder, a discharging cylinder, and two sets of connecting joints. Inside the heating cylinder, from the feeding cylinder to the discharging cylinder, there are sequentially arranged a feeding drying zone, a core heating zone, and a uniform temperature discharging zone. The feeding drying zone is connected to the feeding cylinder, and the discharging cylinder is connected to the uniform temperature discharging zone. The feeding and drying zone is equipped with a fixed cylinder, several sets of lifting plates, several chutes, and several sets of auxiliary lifting parts. The auxiliary lifting parts include two sets of sliders, two sets of springs, a sliding frame, a crossbeam, and lifting plates. The two sets of springs are respectively fixed on one side of the slider. The springs are arranged along the tangential direction of the fixed cylinder. The sliders and springs are arranged along the rotation direction of the fixed cylinder. The sliders face the rotation direction. The sliding frame is fixed on the side of the slider away from the fixed cylinder. The sliding frame is rotatably connected to the inner wall of the fixed cylinder.

[0007] According to the above technical solution, the feed cylinder is located on the right side of the heating cylinder, the discharge cylinder is located on the left side of the heating cylinder, the two sets of connecting joints are respectively located between the feed cylinder and the heating cylinder and between the heating cylinder and the discharge cylinder, the two sets of connecting joints are rotatably connected to the heating cylinder, and the two sets of connecting joints are fixedly connected to the feed cylinder and the discharge cylinder respectively.

[0008] According to the above technical solution, the fixed cylinder is fixedly connected to the heating cylinder, and several sets of lifting plates are fixed at equal intervals inside the fixed cylinder along the axial direction of the fixed cylinder. Adjacent sets of lifting plates are staggered in the circumferential direction. Each set of lifting plates is equidistantly arranged with several of them along the circumferential direction of the fixed cylinder. The number of auxiliary lifting parts is the same as the number of lifting plates. The auxiliary lifting parts are located between two sets of lifting plates in the circumferential direction. The two sets of sliders are located at both ends of the sliding frame along the axis of the fixed cylinder; The fixed cylinder is provided with a plurality of sliding grooves, the number and position of which correspond to the number of sliding blocks; A crossbeam is fixedly connected to the sliding frame, and the second lifting plate is fixed on the side of the crossbeam away from the fixed cylinder. According to the above technical solution, the outer wall of the fixed cylinder is provided with a number of limiting grooves at equal intervals. The number of limiting grooves is the same as that of the lifting plate and their positions correspond. A heating pad is provided in the limiting groove.

[0009] According to the above technical solution, a number of lifting plates are provided in the core heating zone. The lifting plates are fixed at equal intervals inside the heating cylinder along the axial direction of the heating cylinder. Adjacent lifting plates are staggered in the circumferential direction. Each group of lifting plates is provided with a number of lifting plates at equal intervals along the circumferential direction of the heating cylinder. Several lifting plates are provided in the uniform temperature discharge zone, and the lifting plates are equidistantly arranged along the circumference of the heating cylinder.

[0010] According to the above technical solution, an air inlet is provided at the top of the feeding cylinder, a feeding port is provided on the side of the feeding cylinder, and a feeding device is provided at the feeding port; The bottom of the discharge cylinder is provided with a discharge port, and a feeding device is provided below the discharge port; Two sets of connecting joints are fixedly connected to the bracket, and the other two sets of connecting joints are located at the end of the feed cylinder away from the heating cylinder and the end of the discharge cylinder away from the heating cylinder, respectively.

[0011] According to the above technical solution, the driving mechanism includes a motor and two sets of support rollers. The motor is located at the center of the side of the heating cylinder, and the output end of the motor is connected to the gear transmission of the heating cylinder. The two sets of support rollers are located on both sides of the motor. Each set of support rollers has two rollers, and the two support rollers in each set are located on both sides of the heating cylinder. The support rollers are rotatably connected to the heating cylinder.

[0012] According to the above technical solution, a high-temperature flue is fixedly connected to the end of the burner. The high-temperature flue extends from the side of the discharge cylinder into the heating cylinder and extends to the core heating zone. Multiple radiation holes are opened on the side wall of the high-temperature flue.

[0013] According to the above technical solution, the exhaust gas recirculation mechanism includes an induced draft fan and a hot air duct. The induced draft fan is fixed at the top of the air inlet, and the other end of the induced draft fan is connected to the hot air duct. The other end of the hot air duct is connected to the inlet of the burner.

[0014] According to the above technical solution, the temperature detection mechanism includes a support plate and a temperature control module. The support plate is fixed at the top below the discharge port, and the temperature control module is fixed at the bottom of the support plate. The temperature control module is an infrared thermometer combined with a temperature control system. The temperature control system in the temperature control module is connected to the infrared thermometer signal. The temperature control module is electrically connected to the motor and the burner. The temperature control system judges the heating status of the mixture based on the temperature measured by the infrared thermometer, and then adjusts the speed at which the motor drives the heating cylinder to rotate and the flame size of the burner.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention, by dividing the heating cylinder into a feeding drying zone, a core heating zone and a uniform temperature discharge zone, combined with the radiation holes on the side wall of the high temperature flue, can achieve a gradient distribution and precise delivery of heat along the material flow direction, which can ensure both the core heating intensity and the uniform discharge temperature, and avoid local overheating or insufficient heating. By setting up a fixed lifting plate and an auxiliary lifting section with spring buffer, the number of times the material is lifted and the area of ​​spreading can be significantly increased. The spring storage allows the lifting plate to automatically adjust its spacing according to the material load, ensuring that the material fully enters the lifting zone. Furthermore, the preferential falling and impact of the mixed material between the lifting plates enables secondary or even multiple spreading and mixing of the material within the drying zone. This greatly extends the residence and heating time of the material in the preheating stage, improving the initial dehydration and heating efficiency. At the same time, the sliding frame of the auxiliary lifting section scrapes the inner wall of the fixed cylinder, and combined with the impact between the lifting plates, effectively prevents the adhesion and agglomeration of low-temperature, high-humidity materials on the cylinder wall and lifting plates. This ensures the continuous cleanliness of the heat exchange surface and efficient heat transfer, reduces the risk of downtime due to agglomeration and the frequency of manual cleaning, and ensures the stability of continuous production. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a rear view schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a partial structural schematic diagram of the present invention; Figure 5 This is a partial structural front sectional view of the present invention; Figure 6 This is a schematic diagram of the internal structure of the feed drying zone of the present invention; Figure 7 This is a schematic diagram of the overall structure of the auxiliary material lifting section of the present invention; Figure 8 This is the invention Figure 4 Side view sectional diagram Figure 1 ; Figure 9 This is the invention Figure 4 Side view sectional diagram Figure 2 ; Figure 10 This is the invention Figure 9 Enlarged structural diagram of region A in the middle; Figure 11 This is the invention Figure 9 Enlarged structural diagram of region B in the middle; In the diagram: 1. Support; 2. Heating drum; 21. Heating cylinder; 22. Feed cylinder; 221. Air inlet; 222. Feed inlet; 23. Discharge cylinder; 231. Discharge inlet; 24. Connecting joint; 25. Feeding and drying zone; 251. Fixed cylinder; 252. Lifting plate 1; 253. Slide groove; 254. Sliding block; 255. Spring; 256. Sliding frame; 257. Crossbeam; 258. Lifting plate II; 259. Limiting groove; 2510. Heating pad; 26. Core heating zone; 261. Lifting plate III; 27. Uniform temperature discharge zone; 271. Lifting plate IV; 3. Drive mechanism; 31. Motor; 32. Support roller; 4. Burner; 41. High temperature flue; 5. Exhaust gas circulation mechanism; 51. Exhaust fan; 52. Hot air channel; 6. Temperature detection mechanism; 61. Support plate; 62. Temperature control module. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-11 The present invention provides a technical solution: an asphalt hot recycling heating drum, comprising four sets of supports 1, a heating drum 2, an exhaust gas circulation mechanism 5, and a temperature detection mechanism 6. The heating drum 2 is located on the supports 1, the exhaust gas circulation mechanism 5 is located on the top left side of the heating drum 2, and the temperature detection mechanism 6 is located on the bottom right side of the heating drum 2. The heating drum 2 is used to mix and heat the waste asphalt mixture, the exhaust gas circulation mechanism 5 is used to collect and filter the exhaust gas, and the temperature detection mechanism 6 is used to discharge the material. The waste asphalt mixture will be referred to as the mixture below.

[0019] Specifically, such as Figures 1-5 As shown, the heating drum 2 includes a heating cylinder 21, a feeding cylinder 22, a discharging cylinder 23, and two sets of connecting joints 24. The feeding cylinder 22 is located on the right side of the heating cylinder 21, and the discharging cylinder 23 is located on the left side of the heating cylinder 21. The two sets of connecting joints 24 are located between the feeding cylinder 22 and the heating cylinder 21 and between the heating cylinder 21 and the discharging cylinder 23, respectively. Both sets of connecting joints 24 are rotatably connected to the heating cylinder 21, and the two sets of connecting joints 24 are fixedly connected to the feeding cylinder 22 and the discharging cylinder 23, respectively.

[0020] Furthermore, such as Figures 2-5 As shown, the top of the feed cylinder 22 is provided with an air inlet 221, the side of the feed cylinder 22 is provided with a feed port 222, and a feeding device is provided at the feed port 222, which is not shown in the figure.

[0021] It should be noted that the connection between the feed inlet 222 and the feeding device is equipped with a sealing structure as needed, which is not shown in the figure. The feeding device can be a screw conveyor, a hoist, or other devices that can perform the feeding function.

[0022] Furthermore, such as Figures 2-5 As shown, the bottom of the discharge cylinder 23 is provided with a discharge port 231, and a feeding device is provided below the discharge port 231, which is not shown in the figure.

[0023] It should be noted that the feeding device can be a conveyor belt, conveyor, or other device that conveys materials for feeding.

[0024] Furthermore, such as Figures 2-11 As shown, the heating cylinder 21 has a feeding drying zone 25, a core heating zone 26 and a uniform temperature discharge zone 27 arranged sequentially from the feeding cylinder 22 to the discharge cylinder 23 inside the heating cylinder 21. Specifically, the feeding drying zone 25 is connected to the feeding cylinder 22 and the discharge cylinder 23 is connected to the uniform temperature discharge zone 27. Furthermore, such as Figures 1-11 As shown, the feeding drying zone 25 is equipped with a fixed cylinder 251, several sets of lifting plates 252, several chutes 253, and several sets of auxiliary lifting parts. The fixed cylinder 251 is fixedly connected to the heating cylinder 21. Several sets of lifting plates 252 are fixed at equal intervals inside the fixed cylinder 251 along the axial direction of the fixed cylinder 251. Adjacent sets of lifting plates 252 are staggered in the circumferential direction. Each set of lifting plates 252 has several units at equal intervals along the circumferential direction of the fixed cylinder 251. The number of auxiliary lifting parts is the same as the number of lifting plates 252. The auxiliary lifting parts are located between two sets of lifting plates 252 in the circumferential direction.

[0025] like Figure 6 and Figure 7 As shown, the auxiliary lifting section includes two sets of sliders 254, two sets of springs 255, a sliding frame 256, a crossbeam 257, and a second lifting plate 258. The two sets of sliders 254 are located at both ends of the sliding frame 256 along the axis of the fixed cylinder 251. The two sets of springs 255 are fixed on one side of the sliders 254. The springs 255 are arranged along the tangential direction of the fixed cylinder 251. The sliders 254 and springs 255 are arranged along the rotation direction of the fixed cylinder 251, with the sliders 254 facing the rotation direction. The fixed cylinder 251 is provided with a number of sliding grooves 253, the number and position of which correspond to the number of sliders 254. The sliding grooves 253 are used to limit the sliding of sliders 254 and to accommodate sliders 254 and springs 255. The sliding frame 256 is fixed on the side of the slider 254 away from the fixed cylinder 251. The sliding frame 256 is rotatably connected to the inner wall of the fixed cylinder 251. A crossbeam 257 is fixedly connected to the sliding frame 256. The lifting plate 258 is fixed on the side of the crossbeam 257 away from the fixed cylinder 251. like Figure 6 As shown, the outer wall of the fixed cylinder 251 is provided with several limiting grooves 259 at equal intervals. The number of limiting grooves 259 is the same as that of the lifting plate 252 and their positions correspond. A heating pad 2510 is provided in the limiting groove 259. The heating pad 2510 is used to provide auxiliary heating for the fixed cylinder 251 to prevent the temperature of the fixed cylinder 251 from dropping after the mixture is added, which would cause the temperature difference inside the fixed cylinder 251 to increase and the liquid components in the hot air to condense on the fixed cylinder 251, affecting the feeding and heating effect of the mixture. At the same time, it prevents the mixture from adhering to the fixed cylinder 251 and prevents downtime due to the need for manual cleaning.

[0026] It should be noted that both lifting plate 252 and lifting plate 258 are arc-shaped, but the arc length and curvature of lifting plate 258 are greater than those of lifting plate 252. The arc length and curvature of lifting plate 258 and lifting plate 252 are set according to actual needs. Figures 3-11 The heating drum 2 is set to rotate clockwise.

[0027] Based on the supplementary explanation of the above structure, during the continued rotation, the lifting plate 1 252 and the lifting plate 258 gradually move from left low to right high to horizontal, then to left high to right low, and finally to left low to right high. That is, the lifting plate 1 252 and the lifting plate 258 lift the mixture until part of the mixture falls off, then most of it falls off until all of it falls off, and finally lifts the mixture inside the fixed cylinder 251 again. As the fixed cylinder 251 rotates with the heating cylinder 21, the mixture enters the fixed cylinder 251 from the feed cylinder 22. At this time, the lifting plate 252 inside the fixed cylinder 251 rotates with the fixed cylinder 251, which can lift the mixture inside the fixed cylinder 251 from the bottom of the fixed cylinder 251. Since the lifting plate 252 is curved, the lifted mixture will be temporarily stored on the lifting plate 252. When the lifting plate 252 rotates to a certain height, the lifting plate 252 can tilt downward, and the mixture on the lifting plate 252 can slide down along the curve, achieving the effect of lifting and extending the heating time of the mixture, which is conducive to rapidly improving the heating effect of the mixture. Similarly, the second lifting plate 258 is also arc-shaped, so the auxiliary lifting part can also lift the material and extend the preheating time of the mixture. However, on this basis, since the auxiliary lifting part is equipped with a spring 255, and the slider 254 and the spring 255 are arranged along the rotation direction of the fixed cylinder 251, when the first lifting plate 252 is full of the mixture or a new mixture is added, the second lifting plate 258 can contact the mixture inside the fixed cylinder 251. At this time, the second lifting plate 258 is resisted, which drives the slider 254 to rotate in the groove 253 in the opposite direction to the rotation direction of the fixed cylinder 251. At the same time, the spring 255 is stretched and stored by the spring 255, which increases the distance between the second lifting plate 258 and the first lifting plate 252 in the rotation direction of the fixed cylinder 251, further ensuring that the mixture can enter between the first lifting plate 252 and the second lifting plate 258, and increasing the amount of mixture lifted. Meanwhile, since the arc length and arc of lifting plate 258 are both greater than those of lifting plate 252, as lifting plate 252 and lifting plate 258 gradually approach horizontality from left-low to right-high, as... Figure 10 As shown, when some material begins to fall from the first lifting plate 252, it will preferentially fall onto the adjacent second lifting plate 258 with the opposite rotation direction. At this time, the falling mixture can impact the second lifting plate 258. For the second lifting plate 258, which is full of mixture, the falling mixture can use the impact force to push the mixture on the second lifting plate 258 down and fall into the fixed cylinder 251 again. The first lifting plate 252 and the auxiliary lifting part behind the fixed cylinder 251 will carry the mixture again, prolonging the heating time inside the fixed cylinder 251. This ensures that even if there is too much mixture in the feed cylinder 22, the mixture can be fully preheated. For the second lifting plate 258, which is not full of mixture, part of the falling mixture can remain on the second lifting plate 258, while the other part of the mixture will bounce back into the fixed cylinder 251 after falling on the second lifting plate 258 due to the impact force and the counter-impact force.

[0028] As lifting plates 252 and 258 gradually shift from horizontal to a position higher on the left and lower on the right, as... Figure 11As shown, most of the mixture on lifting plate 252 and lifting plate 258 falls off until all of it falls off. At this time, under the action of inertia and gravity, the mixture will fall diagonally downward in the direction of rotation. When the material height at the bottom of the fixed cylinder 251 is not lower than the vertical height of lifting plate 252 and lifting plate 258, the fallen mixture remains on top of the mixture at the bottom of the fixed cylinder 251. When the material height at the bottom of the fixed cylinder 251 is lower than the vertical height of lifting plate 252 and lifting plate 258, The falling mixture will have a certain impact on the lifting plate 258 below, providing the initial force for the lifting plate 258 to withstand the extrusion of the material at the bottom of the fixed cylinder 251, which facilitates the stretching of the spring 255. At the same time, the mixture at the curved bend of the lifting plate 252 and the lifting plate 258 has all fallen off, and the lifting plate 258 is no longer subjected to the gravity of the mixture. The spring 255 is relieved of the force and stretches under the action of the elastic force, which can further coarsely shear the falling mixture above the lifting plate 258. As the lifting plates 252 and 258 gradually move from left-high to right-low to left-low to right-high, the mixed material at the curved section of the lifting plates 252 and 258 has completely fallen off. At this time, the slider 254 is located above the spring 255. The spring 255 is compressed under the gravity of the slider 254 until the lifting plate 258 contacts the material at the bottom of the fixed cylinder 251 again, stretching the spring 255 and storing force. During the rotation of the lifting plate 258 relative to the fixed cylinder 251, the sliding frame 256 rotates along the inner wall of the fixed cylinder 251 to scrape the inner wall of the fixed cylinder 251, further preventing the mixture from adhering to the inner wall of the fixed cylinder 251, thereby preventing the formation of lumps and lumps.

[0029] It should be noted that by adjusting the position of the chute 253 on the fixed cylinder 251, so that the chute 253 is close to the auxiliary lifting part inside the chute 253 and the lifting plate 252 in the direction of rotation, and by adjusting the curvature of the lifting plate 252 and the lifting plate 258, when the spring 255 is compressed, the lifting plate 258 can contact the lifting plate 252. When all the mixture on the auxiliary lifting part falls off and the spring 255 is decompressed, the elastic force of the spring 255 is used to make the lifting plate 258 impact the lifting plate 252, promoting the material to fall off the lifting plate 252 and preventing the mixture from sticking to the lifting plate 252.

[0030] Furthermore, such as Figure 3 As shown, several sets of lifting plates 261 are provided in the core heating zone 26. The several sets of lifting plates 261 are fixed at equal intervals inside the heating cylinder 21 along the axial direction of the heating cylinder 21. Adjacent sets of lifting plates 261 are staggered in the circumferential direction. Each set of lifting plates 261 has several pieces at equal intervals along the circumferential direction of the heating cylinder 21.

[0031] Furthermore, such as Figure 3 As shown, several lifting plates 271 are provided at the uniform temperature discharge zone 27, and the lifting plates 271 are equidistantly arranged along the circumference of the heating cylinder 21.

[0032] Specifically, such as Figure 2 As shown, two sets of connecting joints 24 are fixedly connected to the bracket 1. The other two sets of connecting joints 24 are located at the end of the feed cylinder 22 away from the heating cylinder 21 and the end of the discharge cylinder 23 away from the heating cylinder 21, respectively. The bracket 1 then supports the feed cylinder 22, the discharge cylinder 23, and the connection between the feed cylinder 22 and the heating cylinder 21 and the connection between the discharge cylinder 23 and the heating cylinder 21.

[0033] Specifically, such as Figure 3 As shown, the drive mechanism 3 includes a motor 31 and two sets of support rollers 32. The motor 31 is located at the center of the side of the heating cylinder 21, and the output end of the motor 31 is connected to the heating cylinder 21 by gear transmission. Two sets of support rollers 32 are located on both sides of the motor 31. Each set of support rollers 32 has two rollers. The two support rollers 32 in each set are located on both sides of the heating cylinder 21. The support rollers 32 are rotatably connected to the heating cylinder 21. The motor 31 is used to provide the driving force for the rotation of the heating cylinder 21. The support rollers 32 are used to support the heating cylinder 21 and ensure that the heating cylinder 21 can rotate normally.

[0034] Specifically, such as Figure 3 As shown, a high-temperature flue pipe 41 is fixedly connected to the end of the burner 4. The high-temperature flue pipe 41 extends from the side of the discharge cylinder 23 into the heating cylinder 21 and extends to the core heating zone 26. The side wall of the high-temperature flue pipe 41 is provided with multiple radiation holes. The arrangement of the radiation holes facilitates the heat source of the burner 4 to enter the core heating zone 26 from the high-temperature flue pipe 41, while also dispersing some of it into the uniform temperature discharge zone 27. This avoids a significant temperature drop in the recycled material after it has been heated inside the core heating zone 26 and then enters the uniform temperature discharge zone 27.

[0035] Specifically, such as Figure 3 As shown, the exhaust gas recirculation mechanism 5 includes an induced draft fan 51 and a hot air duct 52. The induced draft fan 51 is fixed at the top of the air inlet 221, and the other end of the induced draft fan 51 is connected to the hot air duct 52. The other end of the hot air duct 52 is connected to the inlet of the burner 4. The induced draft fan 51 is used to draw in the low-temperature, high-humidity, oily exhaust gas generated during the heating process and guide it back to the main burner area for high-temperature incineration treatment. The harmful substances are transported to the burner 4 for high-temperature incineration and decomposition, thereby achieving environmental protection and heat recovery.

[0036] It should be noted that the exhaust gas recirculation mechanism 5 is an existing structure, and will not be described in detail here.

[0037] Specifically, such as Figure 8 As shown, the temperature detection mechanism 6 includes a support plate 61 and a temperature control module 62. The support plate 61 is fixed at the top below the discharge port 231, and the temperature control module 62 is fixed at the bottom of the support plate 61. The support plate 61 is used to provide support for the temperature control module 62. The temperature control module 62 preferably uses an infrared thermometer in conjunction with a temperature control system. The infrared thermometer in the temperature control module 62 is used to obtain the temperature of the mixture after heating by the heating cylinder 21. The temperature control system in the temperature control module 62 is connected to the infrared thermometer signal. The temperature control module 62 is electrically connected to the motor 31 and the burner 4. The temperature control system can determine the heating status of the mixture based on the temperature measured by the infrared thermometer, and then adjust the speed at which the motor 31 drives the heating cylinder 21 to rotate and the flame of the burner 4.

[0038] Operating mode of the temperature control system: Because an infrared thermometer is used, the temperature of the mixture is obtained as a two-dimensional infrared image. Therefore, the temperature control system has a standard temperature range for heating the mixture. The temperature control system obtains the area S1 within the standard temperature range and the area S2 above the standard temperature range within the unit discharge length, and calculates the area ratio X1 of the standard temperature range and the area ratio X2 of the high temperature range. The unit discharge length is denoted as L, the discharge width corresponding to the discharge length is denoted as D, and the discharge area corresponding to the unit discharge length is denoted as DL. Therefore, X1=S1 / DL, X2=S2 / DL.

[0039] The temperature control system is equipped with a threshold and a bias coefficient for the percentage of mixed material outlet temperatures that meet usage requirements. The threshold, denoted as N, is used to determine whether the temperature of the mixed material within a unit outlet length meets the requirements. The bias coefficient, denoted as n, is used to determine whether the temperature of the mixed material that does not meet the requirements is too high. The specific values ​​of n and N are manually set. When X1 ≥ N, the heating cylinder 21 heats the material evenly and is ready for subsequent use; otherwise, the heating cylinder 21 heats the material unevenly. If X2 ≥ nN, the temperature of the mixed material heated by the heating cylinder 21 is too high, and the temperature control system increases the starting speed of the motor 31, thereby driving the heating cylinder 2... Increasing the rotation speed of motor 31 reduces the heating time of the mixture, while decreasing it results in a lower temperature for the mixture heated by heating cylinder 21. The temperature control system then reduces the rotation speed of motor 31 at startup, thereby reducing the rotation speed of heating cylinder 21 and increasing the heating time of the mixture. If the rotation speed of motor 31 is adjusted twice consecutively (increasing or decreasing) and further adjustment is still required, the flame of burner 4 is reduced when the rotation speed of motor 31 needs to be increased to lower the heating temperature, and the flame of burner 4 is increased when the rotation speed of motor 31 needs to be decreased to raise the heating temperature. Thus, the heating parameters of the mixture are intelligently adjusted according to the discharge temperature of the mixture.

[0040] It should be noted that the heating drum 2 is set at an angle, with one end of the feed cylinder 22 being lower than one end of the discharge cylinder 23. As a result, the burner 4 is started to heat the interior of the core heating zone 26. The exhaust gas containing oil and residual heat can be drawn out from the air inlet 221. At this time, this part of the preheated gas enters the feed drying zone 25, which can preheat the newly added mixture inside the feed drying zone 25, forming a counter-current flow of material and hot gas, forming a counter-current heating drum, and achieving gentle and efficient heating.

[0041] The above methods can prevent waste asphalt mixtures from sticking to the walls and forming stubborn clumps, thus achieving efficient, stable, environmentally friendly, and intelligent asphalt mixture regeneration heating.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An asphalt hot recycling heating drum, comprising four sets of supports (1), a heating drum (2), a drive mechanism (3), a burner (4), a waste gas circulation mechanism (5), and a temperature detection mechanism (6), characterized in that, The heating drum (2) is located on the support (1), the exhaust gas circulation mechanism (5) is located on the top left side of the heating drum (2), and the temperature detection mechanism (6) is located on the bottom right side of the heating drum (2). The heating drum (2) includes a heating cylinder (21), a feeding cylinder (22), a discharging cylinder (23), and two sets of connecting joints (24). The heating cylinder (21) has a feeding drying zone (25), a core heating zone (26), and a uniform temperature discharging zone (27) arranged sequentially from the feeding cylinder (22) to the discharging cylinder (23). The feeding drying zone (25) is connected to the feeding cylinder (22), and the discharging cylinder (23) is connected to the uniform temperature discharging zone (27). The feeding drying zone (25) is provided with a fixed cylinder (251), several sets of lifting plates (252), several chutes (253) and several sets of auxiliary lifting parts. The auxiliary lifting parts include two sets of sliders (254), two sets of springs (255), a sliding frame (256), a crossbeam (257) and a second lifting plate (258). The two sets of springs (255) are respectively fixed on one side of the slider (254). The springs (255) are arranged along the tangential direction of the fixed cylinder (251). The slider (254) and the springs (255) are arranged along the rotation direction of the fixed cylinder (251). The slider (254) faces the rotation direction. The sliding frame (256) is fixed on the side of the slider (254) away from the fixed cylinder (251). The sliding frame (256) is rotatably connected to the inner wall of the fixed cylinder (251). The feed cylinder (22) is located on the right side of the heating cylinder (21), and the discharge cylinder (23) is located on the left side of the heating cylinder (21). The two sets of connecting joints (24) are located between the feed cylinder (22) and the heating cylinder (21) and between the heating cylinder (21) and the discharge cylinder (23), respectively. Both sets of connecting joints (24) are rotatably connected to the heating cylinder (21), and the two sets of connecting joints (24) are fixedly connected to the feed cylinder (22) and the discharge cylinder (23), respectively. The fixed cylinder (251) is fixedly connected to the heating cylinder (21). Several sets of lifting plates (252) are fixed at equal intervals inside the fixed cylinder (251) along the axial direction of the fixed cylinder (251). Two adjacent sets of lifting plates (252) are staggered in the circumferential direction. Several sets of lifting plates (252) are equidistantly arranged in the circumferential direction of the fixed cylinder (251). The number of auxiliary lifting parts is the same as the number of lifting plates (252). The auxiliary lifting parts are located between two sets of lifting plates (252) in the circumferential direction. The two sets of sliders (254) are located at both ends of the sliding frame (256) along the axis of the fixed cylinder (251); The fixed cylinder (251) is provided with a plurality of sliding grooves (253), and the number and position of the sliding grooves (253) correspond to the number and position of the sliders (254); A crossbeam (257) is fixedly connected to the sliding frame (256), and the second lifting plate (258) is fixed on the side of the crossbeam (257) away from the fixed cylinder (251).

2. The asphalt thermal recycling heating drum according to claim 1, characterized in that, The outer wall of the fixed cylinder (251) is provided with a number of limiting grooves (259) at equal intervals. The number of limiting grooves (259) is the same as that of the lifting plate (252) and their positions correspond. A heating pad (2510) is provided in the limiting groove (259).

3. The asphalt thermal recycling heating drum according to claim 2, characterized in that, Several sets of lifting plates (261) are provided in the core heating zone (26). The several sets of lifting plates (261) are fixed at equal intervals inside the heating cylinder (21) along the axial direction of the heating cylinder (21). Adjacent sets of lifting plates (261) are staggered in the circumferential direction. Each set of lifting plates (261) has several pieces at equal intervals along the circumferential direction of the heating cylinder (21). A number of lifting plates (271) are provided in the uniform temperature discharge zone (27), and the lifting plates (271) are equidistantly arranged along the circumferential direction of the heating cylinder (21).

4. The asphalt thermal recycling heating drum according to claim 3, characterized in that, The top of the feed cylinder (22) is provided with an air inlet (221), the side of the feed cylinder (22) is provided with a feed port (222), and a feeding device is provided at the feed port (222); The bottom of the discharge cylinder (23) is provided with a discharge port (231), and a feeding device is provided below the discharge port (231); The two sets of connecting joints (24) are fixedly connected to the bracket (1), and the other two sets of connecting joints (24) are located at the end of the feed cylinder (22) away from the heating cylinder (21) and the end of the discharge cylinder (23) away from the heating cylinder (21), respectively.

5. The asphalt thermal recycling heating drum according to claim 4, characterized in that, The drive mechanism (3) includes a motor (31) and two sets of support rollers (32). The motor (31) is located at the center of the side of the heating cylinder (21), and the output end of the motor (31) is connected to the heating cylinder (21) by gear transmission. The two sets of support rollers (32) are located on both sides of the motor (31). Each set of support rollers (32) has two rollers. The two support rollers (32) in each set are located on both sides of the heating cylinder (21). The support rollers (32) are rotatably connected to the heating cylinder (21).

6. The asphalt thermal recycling heating drum according to claim 5, characterized in that, The burner (4) is fixedly connected to a high-temperature flue pipe (41) at its end. The high-temperature flue pipe (41) extends from the side of the discharge cylinder (23) into the heating cylinder (21) and extends to the core heating zone (26). The side wall of the high-temperature flue pipe (41) is provided with multiple radiation holes.

7. The asphalt thermal recycling heating drum according to claim 6, characterized in that, The exhaust gas recirculation mechanism (5) includes an induced draft fan (51) and a hot air duct (52). The induced draft fan (51) is fixed on the top of the air inlet (221). The other end of the induced draft fan (51) is connected to the hot air duct (52). The other end of the hot air duct (52) is connected to the inlet of the burner (4).

8. The asphalt hot recycling heating drum according to claim 7, characterized in that, The temperature detection mechanism (6) includes a support plate (61) and a temperature control module (62). The support plate (61) is fixed at the top below the discharge port (231), and the temperature control module (62) is fixed at the bottom of the support plate (61). The temperature control module (62) is an infrared thermometer combined with a temperature control system. The temperature control system in the temperature control module (62) is connected to the infrared thermometer signal. The temperature control module (62) is electrically connected to the motor (31) and the burner (4). The temperature control system judges the heating status of the mixture based on the temperature measured by the infrared thermometer, and then adjusts the speed at which the motor (31) drives the heating cylinder (21) to rotate and the flame size of the burner (4).

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