Regeneration roller of heat tracing regeneration equipment of asphalt mixture plant

Abstract

A regeneration roller of heat tracing regeneration equipment of an asphalt mixture plant comprises a combustor (1), an air mixer (2) and a regeneration roller (3), the combustor (1) is located at the front end of the regeneration roller (3) and used for providing heat and ensuring that an asphalt mixture reaches a proper temperature before entering the regeneration roller (3); the air mixer (2) is responsible for uniformly distributing the heat generated by the combustor (1) so as to ensure the consistency of the heating effect; the regeneration roller (3) is the core part of the whole equipment, and uniform hot air is in full contact with a stirring material in the roller when passing through the rotating roller, so that the purpose of heat exchange is realized, and the regenerated material is heated, so that the temperature of the regenerated material is increased to the temperature required by the process.

Description

Technical Field

[0001] This utility model relates to the field of asphalt mixing commercial concrete technology, specifically a recycling drum of a heat-traced recycling device for asphalt mixture plants. Background Technology

[0002] The heated recycling equipment in an asphalt mixture plant heats both virgin and recycled materials before mixing them in a mixing tank to form finished asphalt concrete. Recycled asphalt refers to waste material from milled asphalt pavements. Because this waste contains a significant amount of asphalt, dumping it would pollute the environment. However, the asphalt content in the waste still has value; secondary recycling not only saves on the aggregate but also allows for the reuse of valuable asphalt. Therefore, the secondary utilization of recycled materials offers high economic benefits.

[0003] Heating virgin materials is a mature technology. However, heating recycled materials presents more challenges. Currently, manufacturers employ two methods for heating recycled materials: co-current heating and counter-current heating. The principle of co-current heating is that the heating airflow and the recycled material flow are in the same direction. The high-temperature airflow heats the cold material just entering the drum, while the low-temperature airflow heats the hot material about to exit the drum. The advantage of co-current heating is that the material adheres less, but the disadvantages are lower discharge temperature and lower heating efficiency. The principle of counter-current heating is that the direction of the heating airflow is opposite to the direction of the recycled material flow. The high-temperature heating airflow corresponds to the high-temperature recycled material about to enter the feed inlet, while the low-temperature airflow corresponds to the low-temperature recycled material just entering the drum. Because the high-temperature recycled material is exposed to the high-temperature airflow, the asphalt in the material will release flammable gases, which may ignite upon encountering the high-temperature airflow. Therefore, in counter-current heating, the temperature of the heating airflow needs to be controlled at a lower level. The advantages of counter-current heating are high thermal energy utilization and high discharge temperature. However, the disadvantage is also fatal: because the asphalt in the recycled material has already softened due to heating, it adheres very badly. In practice, we generally need to clean it once every 10,000 tons produced. Therefore, as actual producers, we urgently need to solve the problem of material adhesion in counter-current recycling drums. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a recycling drum for a heat-traced recycling device in an asphalt mixture plant.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A recycling drum of a heated recycling equipment for an asphalt mixture plant includes a burner 1, a mixer 2, and a recycling drum 3. The burner 1 is located at the front end of the recycling drum 3 and is used to provide heat to ensure that the asphalt mixture reaches an appropriate temperature before entering the recycling drum 3. The mixer 2 is responsible for evenly distributing the heat generated by the burner 1 to ensure consistent heating effect. The recycling drum 3 is the core part of the entire equipment. It rotates to fully mix and recycle the heated asphalt mixture.

[0007] This utility model also has the following additional technical features:

[0008] As a further specific optimization of the technical solution of this utility model: the recycling drum 3 includes a drum body 301 and a discharge port 302; the discharge port 302 is welded and installed at the front end of the drum body 301, the drum body 301 is a hollow cylindrical shape, and the discharge port 302 is a constricted conical shape; the discharge port 302 can accelerate the forward speed of hot material and reduce material sticking.

[0009] As a further specific optimization of the technical solution of this utility model: the inner wall of the drum body 301 is provided with stirring blades, which can improve the mixing efficiency and prevent materials from adhering to the inner wall of the drum.

[0010] As a further specific optimization of the technical solution of this utility model, the recycling drum 3 is also equipped with a temperature sensor and a control system to monitor and adjust the temperature inside the drum in real time, so as to ensure the stability of the recycling process and the quality of the asphalt mixture.

[0011] As a further specific optimization of the technical solution of this utility model: the front and rear sides of the drum body 301 are equipped with rails, and the rails are fitted with rollers 4. The setting of rollers 4 enables the regeneration drum 3 to rotate smoothly during operation. The material of rollers 4 is selected to be wear-resistant and high-temperature resistant to ensure that it can maintain good performance in the long-term high-temperature working environment. Through this design, the service life and working efficiency of the equipment can be effectively improved.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] The recycling drum 3 is the core part of the entire equipment. When the uniform hot air passes through the rotating drum, it comes into full contact with the agitated material inside the drum, thereby achieving the purpose of heat exchange and heating the recycled material, raising its temperature to the required process temperature.

[0014] Based on the analysis of the actual bonding shape and bonding material density on site, the straight section of the discharge port 302 of the roller body 301 of the traditional straight cylindrical drum is changed to a conical section, which can speed up the forward speed of hot material and reduce material adhesion. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the regeneration drum structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the recycling drum 3 of this utility model, which is equipped with rollers 4.

[0017] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0018] Explanation of reference numerals in the attached diagram: 1. Burner; 2. Mixer; 3. Regeneration drum; 4. Roller; 5. Base; 6. Motor; 7. Chain. Detailed Implementation

[0019] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.

[0020] Example 1

[0021] The recycling drum of the asphalt mixture plant's heated recycling equipment includes a burner 1, a mixer 2, and a recycling drum 3. The burner 1 is located at the front end of the recycling drum 3 and is used to provide heat to ensure that the asphalt mixture reaches the appropriate temperature before entering the recycling drum 3. The mixer 2 is responsible for evenly distributing the heat generated by the burner 1 to ensure consistent heating effect. The recycling drum 3 is the core part of the entire equipment. It rotates to fully mix and recycle the heated asphalt mixture.

[0022] The recycling drum 3 includes a drum body 301 and a discharge port 302. The discharge port 302 is welded to the front end of the drum body 301. The drum body 301 is a hollow cylindrical shape, and the discharge port 302 is a constricted conical shape. The discharge port 302 can accelerate the forward speed of hot material and reduce material sticking.

[0023] The inner wall of the drum body 301 is provided with stirring blades, which can improve mixing efficiency and prevent materials from adhering to the inner wall of the drum.

[0024] The recycling drum 3 is also equipped with a temperature sensor and control system to monitor and regulate the temperature inside the drum in real time, ensuring the stability of the recycling process and the quality of the asphalt mixture.

[0025] The front and rear sides of the drum body 301 are equipped with rails, and rollers 4 are installed on the rails. The rollers 4 enable the regeneration drum 3 to rotate smoothly during operation. The rollers 4 are made of wear-resistant and high-temperature resistant material to ensure that they can maintain good performance in long-term high-temperature working environments. This design can effectively improve the service life and working efficiency of the equipment.

[0026] Due to the high temperature and viscosity of the material at the 302 discharge port, it adheres to the drum wall, gradually thickening and hindering the forward movement of subsequent materials. This leads to material accumulation and adhesion. The rotating drum has an overall tilt angle to provide natural propulsion for the material within it. A smaller angle results in a slower material speed, allowing it to remain inside the drum for a longer time, thus increasing the contact time between the material and the hot airflow and ensuring more thorough heating. However, excessively long contact time can cause material accumulation. Conversely, a larger tilt angle results in a faster material speed, leading to a shorter time inside the drum and less contact time with the hot airflow, resulting in insufficient heating and ineffective heating of the recycled material. Therefore, considering these two factors, each manufacturer designs a suitable angle based on the drum rotation speed to ensure an appropriate holding time for the material within the drum. However, a characteristic of straight drums is that the material's forward speed at the inlet and outlet is consistent. If the discharge port 302 is changed to a horn cone, the material in the discharge port 302 will have a higher forward speed. Since the material in the discharge port 302 is heated for a longer time, its temperature is higher and its viscosity is greater. The slightly higher forward speed reduces the chance of the material sticking to the cylinder wall due to the increased viscosity, thus extending the service life of the cylinder.

[0027] Due to the design of the outlet flared mouth, the space for material adhesion is increased, which inevitably prolongs the running time of the roller.

[0028] Because the space at the feed inlet 302 is increased, and the heating airflow temperature is highest relative to the rear side of the drum, the flow velocity is also the highest, resulting in the greatest resistance to the material. The flared cone design increases the cross-sectional area of ​​the hot airflow, reduces its velocity, and relatively reduces the resistance to the recycled material, thus accelerating its forward speed. This increase in the forward speed of the recycled material is only localized and small-scale, having little impact on the overall heat exchange efficiency of the recycled material.

[0029] Based on the above analysis, changing the feed inlet 302 of the recycling drum to a conical flared opening is effective, and the cone opening should not be too large, generally increasing the original diameter by 20-40 cm.

[0030] Example 2

[0031] Based on Embodiment 1, the system also includes a base 5. Rollers 4 are mounted on both sides of the middle of the base 5 via roller brackets. A motor 6 is mounted on the left side of the base 5, and the motor 6 is connected to the left roller 4 via a chain 7. When the motor 6 is working, it drives the chain 7 to rotate, which in turn drives the roller 4 to rotate, thereby rotating the recycling drum 3.

[0032] The above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

Claims

1. A recycling drum in a heated recycling device for asphalt mixture plants, characterized in that: It includes a burner (1), a mixer (2), and a recycling drum (3), wherein: the burner (1) is located at the front end of the recycling drum (3) and is used to provide heat; the mixer (2) is responsible for evenly distributing the heat generated by the burner (1); the recycling drum (3) fully mixes and recycles the heated asphalt mixture by rotating; The recycling drum (3) includes a drum body (301) and a discharge port (302); the discharge port (302) is welded to the front end of the drum body (301), the drum body (301) is a hollow cylindrical shape, and the discharge port (302) is a constricted conical shape. The inner wall of the drum body (301) is provided with stirring blades; The front and rear sides of the drum body (301) are equipped with rails, and rollers (4) are installed on the rails. The rollers (4) enable the regeneration drum (3) to rotate smoothly during operation.

2. The recycling drum of the asphalt mixture plant heat-traced recycling equipment according to claim 1, characterized in that: The recycling drum (3) is also equipped with a temperature sensor and a control system.

Images