Continuous production device and method for processing modified asphalt by utilizing ultrasonic technology

Abstract

The invention belongs to the technical field of modified asphalt processing, and particularly relates to a continuous production device and method for processing modified asphalt through the ultrasonic technology, the continuous production device comprises a building type frame, the building type frame is sequentially provided with a modifier feeding hopper from left to right, and the modifier feeding hopper is connected with a premixing tank through a spiral rising pipeline; the premixing tank is connected with a colloid mill through a pipeline, the colloid mill is respectively connected with two ultrasonic reaction kettles, the two ultrasonic reaction kettles are jointly connected with a development tank, four ultrasonic tool heads are arranged in the ultrasonic reaction kettles, and ultrasonic generators are arranged on the ultrasonic tool heads. The stepped design avoids the treatment bottleneck of single equipment, and the ultrasonic technology is introduced, so that the problems of polymer agglomeration and interfacial compatibility are solved on the microscopic level, and the synergistic interaction of physical modification and chemical activation is realized.

Description

Technical Field

[0001] This invention belongs to the field of modified asphalt processing technology, specifically relating to a continuous production device and method for processing modified asphalt using ultrasonic technology. Background Technology

[0002] Asphalt, an indispensable material in highway construction, softens at high temperatures and becomes brittle at low temperatures. In many regions with significant temperature variations, the requirements for asphalt are even higher. Base asphalt often cannot meet the demands of highway construction. Adding a certain amount of modifier to the base asphalt and mixing it uniformly through shearing and stirring improves the asphalt's performance, thus meeting the requirements for highway use. Commonly used modifiers for road modified asphalt are mainly classified into rubber-based, resin-based, and thermoplastic rubber-based modifiers. The most common modifiers are rubber powder and SBS. Since rubber powder is derived from waste car tires, it offers the dual advantages of waste utilization and extending road lifespan. Rubber powder-modified asphalt can significantly reduce costs, making it an important direction for research in road modified asphalt.

[0003] In the preparation of polymer-modified asphalt, the large difference in solubility parameters between the polymer and asphalt leads to poor compatibility, disrupting the stability of the asphalt system. Further processing using a mixing tank, high-speed shearing machine, and colloid milling is necessary to produce high-performance polymer-modified asphalt. Therefore, a specific production process and equipment are required. With the increasing demands for modified asphalt performance in road engineering, traditional single-process methods are insufficient to meet the needs of high-quality and high-efficiency production. Modern modified asphalt equipment increasingly adopts a "multi-stage composite process" (premixing + high shearing + development) combined with an intelligent control system to optimize the modification effect and improve production stability. The core process and technical characteristics of this process are detailed below. The multi-stage composite process ensures that modifiers (such as SBS, rubber powder, etc.) are fully swollen, dispersed, and stabilized in the asphalt through staged processing. To improve the quality stability of modified asphalt, modern equipment generally integrates a PLC (Programmable Logic Controller) + SCADA (Supervisory Control and Data Acquisition) system to achieve intelligent functionality.

[0004] In the traditional process of preparing modified asphalt, chemical additives such as surfactants, compatibilizers, and stabilizers are usually added to enhance the compatibility of the two phases and the stability of the blended system. However, this method may impose a burden on the environment and is not conducive to achieving the goal of clean production. Summary of the Invention

[0005] This invention addresses the problem that existing technologies cannot meet the storage stability requirements of modified asphalt by providing a continuous production device and method for processing modified asphalt using ultrasonic technology.

[0006] To achieve the above objectives, the present invention employs the following technical solution: A continuous production device for modified asphalt using ultrasonic technology includes a multi-story frame, which is divided into an upper and lower layer. Modifier feeding hoppers are arranged sequentially from left to right on the multi-story frame. The modifier feeding hoppers are fixedly installed on the upper layer and connected to one inlet of a premixing tank via a spiral rising pipe. The premixing tank has two inlets at its upper end, and the other inlet is connected to an external feed pipe. The premixing tank is fixedly installed on the lower layer by a support frame, extending to the upper layer. The outlet of the premixing tank is connected to the inlet of a colloid mill via a pipe. The colloid mill is located on the lower layer, and its outlet is connected to two ultrasonic feed hoppers via pipes. The ultrasonic reactor has a feed inlet and is fixedly installed on the lower layer by a support frame. Half of the ultrasonic reactor body is located on the upper layer and the other half is located on the lower layer. Two ultrasonic reactors are arranged longitudinally. The discharge ports of the two ultrasonic reactors are connected to the feed inlet of the development tank through a pipe. The development tank is fixedly installed on the lower layer by a support frame and extends to the upper layer. The premixing tank, ultrasonic reactor, and development tank are all equipped with heat insulation components. The internal pipes of the heat insulation components are filled with heat transfer oil. The system also includes a chassis cabinet, which is fixedly installed on the leftmost side of the lower layer. The chassis cabinet is used for power control of the spiral riser pipe, premixing tank, colloid mill, ultrasonic reactor, and development tank. The ultrasonic reactor has a vertical cylindrical structure. An agitator is installed inside the ultrasonic reactor, and the agitator is connected to the output shaft of a stepper motor via a coupling. The stepper motor is fixedly installed on the top cover of the ultrasonic reactor. Four ultrasonic tool heads are installed inside the ultrasonic reactor, evenly distributed in a circular array around the agitator, and fixedly installed on the top cover of the ultrasonic reactor. Each ultrasonic tool head is equipped with an ultrasonic generator. The feed inlets of two ultrasonic reactors are connected to the discharge outlet of a colloid mill via a common pipe, and the discharge outlet of the ultrasonic reactor is connected to the feed inlet of a development tank via a common pipe.

[0007] Furthermore, a No. 1 asphalt pump is installed between the colloid mill and the two ultrasonic reactors, and a No. 2 asphalt pump is installed between the two ultrasonic reactors and the development tank. Both the No. 1 and No. 2 asphalt pumps are connected to the chassis cabinet.

[0008] Furthermore, the inlet and outlet of the premix tank, the inlet and outlet of the colloid mill, the inlet and outlet of the two ultrasonic reactors, and the inlet and outlet of the development tank are all equipped with pneumatic butterfly valves and flow meters, and the pneumatic butterfly valves and flow meters are all connected to the chassis cabinet.

[0009] Furthermore, pressure sensors and level sensors are installed at the bottom of the premix tank, the bottom of the two ultrasonic reactors, and the bottom of the development tank. Temperature sensors are installed at the top of the premix tank, the top of the two ultrasonic reactors, and the top of the development tank. The pressure sensors, level sensors, and temperature sensors are all connected to the cabinet.

[0010] Furthermore, the external feed pipe is configured as a double-layer feed pipe, with the inner layer of the external feed pipe configured as a material feed pipe, the material feed pipe being connected to one of the feed ports of the premix tank via a pipeline, and the outer layer of the external feed pipe configured as a heat-conducting oil pipe, the heat-conducting oil pipe being connected to the insulation component outside the premix tank via a pipeline.

[0011] A continuous production apparatus and method for processing modified asphalt using ultrasonic technology, comprising the following steps: Step 1: The pre-insulated base asphalt and polymer modifier, such as rubber powder, are continuously and stably fed into the premix tank in a set ratio through the external feed pipe and spiral rising pipe. During this process, the amount of asphalt and modifier added is monitored and measured in real time by the flow meter and pressure sensor, and the monitoring data is transmitted to the cabinet to ensure accurate mixing ratio. Step 2: The premix tank is heated by the insulation components to bring the base asphalt to the physical modification temperature. The temperature of the premix tank is monitored and controlled in real time by the temperature sensor and the chassis cabinet. The base asphalt is then fed into the premix tank, and the weighed polymer is added. The chassis cabinet starts the stirring operation in the premix tank to perform high-intensity shear emulsification of the mixture. The pre-mixed modified asphalt is fed into the colloid mill through the pipeline. The weight of the modified asphalt is measured by the flow meter and pressure sensor. Step 3: The colloid mill is heated to the physical modification temperature of asphalt using a heat preservation device. The modified asphalt is then fed into the colloid mill based on real-time temperature monitoring by a temperature sensor. The colloid mill performs deep grinding and shearing of the material at high speed to further reduce the particle size of the polymer particles and improve their uniformity of distribution. After shearing, the colloid mill is shut down, and the mixed modified asphalt is fed into two ultrasonic reactors through a No. 1 asphalt pump. The amount of asphalt and modifier added is monitored and measured in real time using a flow meter and a pressure sensor to ensure accurate proportioning. Step 4: The internal temperature of the ultrasonic reactor is raised to the physical modification temperature of the asphalt using a heat preservation device. The temperature is monitored in real time by a temperature sensor and fed back to the control cabinet. The modified asphalt is then introduced into the two ultrasonic reactors through pipelines. A stepper motor is started to shear, emulsify, and ultrasonically treat the mixture of base asphalt and polymer. The cavitation effect generated by ultrasound provides huge local energy at the microscale, which works synergistically with mechanical shearing to achieve ultrafine dispersion of the polymer and strengthen interfacial bonding. After shearing and ultrasonic treatment, the control cabinet shuts down the two ultrasonic reactors and introduces the mixed modified asphalt into the development tank through the No. 2 asphalt pump. The temperature of the development tank is lowered to the swelling temperature. The temperature is monitored in real time by a temperature sensor to allow the polymer molecular chains to fully extend, swell, and fuse in the asphalt, ultimately obtaining a polymer-modified asphalt product with stable storage and excellent performance.

[0012] Furthermore, the mass percentage of the polymer modifier to the base asphalt is set as follows: 15.3% of the polymer modifier and 74.7% of the base asphalt, with the sum of the mass percentages of the above components being 100%.

[0013] Furthermore, the physical modification temperature is set to 120–200°C.

[0014] Furthermore, the motor speed of the premixing tank is set to 1000 rpm, the stirring time of the premixing tank is set to 60-75 min, the motor speed of the colloid mill is set to 4000 rpm, the stepper motor speed of the ultrasonic reactor is set to 200 rpm, the frequency of the ultrasonic generator is set to 20-35 kHz, and the combined action time of the stepper motor and the ultrasonic generator is set to 10-60 min.

[0015] Furthermore, the swelling temperature of the development tank is set to 100–150°C, and the swelling time is 10–30 min.

[0016] Compared with the prior art, the present invention has the following advantages: 1. This invention integrates and synergizes a premixing tank, a colloid mill, an ultrasonic reactor, and a development tank. This step-by-step design avoids the bottleneck of a single device. In particular, the introduction of ultrasonic technology solves the problems of polymer agglomeration and interfacial compatibility at the microscopic level, and achieves synergistic effects of physical modification and chemical activation.

[0017] 2. This invention uses an ultrasonic reactor, which utilizes the ultrasonic cavitation effect to generate huge local energy at the microscale, effectively breaking polymer agglomeration, achieving nanoscale dispersion, and activating the interaction between asphalt and polymer interface, significantly improving compatibility, thereby producing modified asphalt with better storage stability and road performance.

[0018] 3. By utilizing the excellent physical activation and dispersion properties of ultrasound, this invention can significantly reduce or even completely avoid the use of chemical additives such as surfactants and compatibilizers that must be added in traditional processes to improve compatibility, thereby effectively reducing production costs and fully meeting the environmental protection standards of green and clean production.

[0019] 4. This invention transmits monitoring data to the chassis cabinet via flow meter, pressure sensor, and temperature sensor. The chassis cabinet then precisely controls key parameters such as temperature, rotation speed, and reaction time at each stage, including stirring in the premix tank, fine grinding in the colloid mill, treatment in the ultrasonic reactor, and swelling in the development tank. This forms an optimized process chain. This process not only ensures the efficient dispersion of the modifier but also ensures the final stability of the product through the final low-temperature swelling stage, achieving a balance between production efficiency and product quality. At the same time, it enables real-time monitoring and data feedback of the entire process from raw material ratio and reaction temperature to material transfer, ensuring the precise execution of process parameters and the consistency of product quality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a schematic diagram of the ultrasonic reactor of the present invention; Figure 5 This is a schematic diagram of the premix tank of the present invention; In the diagram, 1 is the building frame, 2 is the modifier feeding hopper, 3 is the premix tank, 4 is the external feed pipe, 5 is the colloid mill, 6 is the ultrasonic reactor, 7 is the development tank, 8 is the insulation component, 9 is the chassis cabinet, 10 is the spiral riser pipe, 11 is the agitator, 12 is the stepper motor, 13 is the ultrasonic tool head, 14 is the ultrasonic generator, 15 is the No. 1 asphalt pump, 16 is the No. 2 asphalt pump, 17 is the pneumatic butterfly valve, and 18 is the flow meter. Detailed Implementation

[0021] To further illustrate the technical solution of the present invention, the present invention will be further described below through embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, a continuous production device for modified asphalt using ultrasonic technology includes a floor-type frame 1, which is divided into an upper and lower layer. Modifier feeding hoppers 2 are arranged sequentially from left to right on the floor-type frame 1. The modifier feeding hoppers 2 are fixedly installed on the upper layer. The modifier feeding hoppers 2 are connected to one inlet of a premix tank 3 via a spiral rising pipe 10. The premix tank 3 has two inlets at its upper end. The other inlet of the premix tank 3 is connected to an external feed pipe 4. The external feed pipe 4 is a double-layer feed pipe, with the inner layer being a material feed pipe. The material feed pipe is connected to one inlet of the premix tank 3 via a pipe. The outer layer of the external feed pipe 4 is configured as a heat-conducting oil pipe. The heat-conducting oil pipe is connected to the insulation component 8 outside the premix tank via a pipe. The premix tank 3 is fixedly installed on the lower layer by a support frame and extends to the upper layer. The outlet of the premix tank 3 is connected to the inlet of the colloid mill 5 via a pipe. The colloid mill 5 is located on the lower layer. The outlet of the colloid mill 5 is connected to the inlets of two ultrasonic reactors 6 via pipes. A first asphalt pump 15 is installed between the colloid mill 5 and the two ultrasonic reactors 6. A second asphalt pump 16 is installed between the two ultrasonic reactors 6 and the development tank 7. Both the first asphalt pump 15 and the second asphalt pump 16 are connected to the chassis cabinet 9. The ultrasonic reactor 6 is fixedly installed on the lower layer by a support frame. Half of the vessel body of the ultrasonic reactor 6 is located on the upper layer, and the other half is located on the lower layer. The two ultrasonic reactors 6 are arranged longitudinally. The discharge ports of the two ultrasonic reactors 6 are connected to the inlet of the development tank 7 through a pipe. The development tank 7 is fixedly installed on the lower layer by a support frame and extends to the upper layer. The premixing tank 3, the ultrasonic reactor 6, and the development tank 7 are all equipped with heat preservation components 8. The inlet and outlet of the premixing tank 3, the inlet and outlet of the colloid mill 5, the inlet and outlet of the two ultrasonic reactors 6, and the inlet and outlet of the development tank 7 are all equipped with pneumatic butterfly valves 17 and flow meters 18. Both the flow meter 17 and the flow meter 18 are connected to the cabinet 9. The heat-conducting oil is installed inside the pipe of the insulation component 8. The cabinet 9 is also included. The cabinet 9 is fixedly installed on the leftmost side of the lower layer. The cabinet 9 is used for power control of the spiral rising pipe 10, the premixing tank 3, the colloid mill 5, the ultrasonic reactor 6, and the development tank 7. Pressure sensors and level sensors are installed at the bottom of the premixing tank 3, the bottom of the two ultrasonic reactors 6, and the bottom of the development tank 7. Temperature sensors are installed at the top of the premixing tank 3, the top of the two ultrasonic reactors 6, and the top of the development tank 7. The pressure sensors, level sensors, and temperature sensors are all connected to the cabinet 9.

[0023] like Figure 2 and Figure 4As shown, the ultrasonic reactor 6 has a vertical cylindrical structure. A stirrer 11 is installed inside the ultrasonic reactor 6. The stirrer 11 is connected to the output shaft of a stepper motor 12 via a coupling. The stepper motor 12 is fixedly installed on the top cover of the ultrasonic reactor 6. Four ultrasonic tool heads 13 are provided inside the ultrasonic reactor 6. The four ultrasonic tool heads 13 are evenly distributed in a circular array with the stirrer 11 as the center and are fixedly installed on the top cover of the ultrasonic reactor 6. An ultrasonic generator 14 is provided on each ultrasonic tool head 13. The feed ports of the two ultrasonic reactors 6 are connected to the discharge port of the colloid mill 5 through a common pipe. The discharge port of the ultrasonic reactor 6 is connected to the feed port of the development tank 7 through a common pipe.

[0024] A continuous production apparatus and method for processing modified asphalt using ultrasonic technology, comprising the following steps: Step 1: Through the external feed pipe 4 and the spiral riser pipe 10, the pre-insulated base asphalt and polymer modifier, such as rubber powder, are continuously and stably fed into the premix tank 3 in a set ratio. During this process, the amount of asphalt and modifier added is monitored and measured in real time by the flow meter 18 and the pressure sensor, and the monitoring data is transmitted to the chassis cabinet 9 to ensure accurate mixing ratio. The mass percentage of the polymer modifier and base asphalt is set as follows: 15.3% polymer powder and 74.7% base asphalt, and the sum of the mass percentages of the above components is 100%. Step 2: The premix tank 3 is heated by the insulation component 8 to bring the base asphalt to the physical modification temperature. The temperature sensor and the cabinet 9 are used to provide real-time temperature feedback and control of the premix tank 3. The base asphalt is then fed into the premix tank 3, and the weighed polymer is added. The cabinet 9 starts the stirring operation in the premix tank 3 to perform high-intensity shear emulsification on the mixture. The preliminarily mixed modified asphalt is fed into the colloid mill 5 through the pipeline. The weight of the modified asphalt is measured by the flow meter 18 and the pressure sensor. Step 3: The colloid mill 5 is heated to the physical modification temperature of asphalt using a heat preservation device. The modified asphalt is then fed into the colloid mill 5 based on the real-time temperature monitoring by the temperature sensor. The colloid mill 5 performs deep grinding and shearing of the material at high speed to further reduce the particle size of the polymer particles and improve their distribution uniformity. After shearing, the colloid mill 5 is shut down, and the mixed modified asphalt is fed into two ultrasonic reactors 6 through the No. 1 asphalt pump 15. The amount of asphalt and modifier added is monitored and measured in real time using a flow meter 18 and a pressure sensor to ensure accurate proportioning. Step 4: The internal temperature of the ultrasonic reactor 6 is raised to the physical modification temperature of the asphalt using a heat preservation device. The physical modification temperature is set to 120-200℃. The temperature is monitored in real time by a temperature sensor and fed back to the cabinet 9. The modified asphalt is then introduced into the two ultrasonic reactors 6 through pipes. The stepper motor 12 is started to shear, emulsify, and ultrasonically treat the mixture of base asphalt and polymer. The cavitation effect generated by the ultrasound provides huge local energy at the microscale, which works synergistically with mechanical shearing to achieve ultrafine dispersion of the polymer and strengthen interfacial bonding. After shearing and ultrasonic treatment, the cabinet 9 shuts down the two ultrasonic reactors 6 and introduces the mixed modified asphalt into the development tank 7 through the second asphalt pump 16. The temperature of the development tank 7 is lowered to the swelling temperature. The temperature is monitored in real time by a temperature sensor to allow the polymer molecular chains to fully extend, swell, and fuse in the asphalt. The swelling temperature of the development tank 7 is set to 100-150℃, and the swelling time is 10-30 minutes. Finally, a polymer-modified asphalt product with stable storage and excellent performance is obtained.

[0025] The motor speed of the premixing tank 3 is set to 1000 rpm, the stirring time of the premixing tank 3 is set to 60-75 min, the motor speed of the colloid mill 5 is set to 4000 rpm, the stepper motor 12 of the ultrasonic reactor 6 is set to 200 rpm, the frequency of the ultrasonic generator 14 is set to 20-35 kHz, and the combined action time of the stepper motor 12 and the ultrasonic generator 14 is set to 10-60 min.

[0026] The foregoing has shown and described the main features and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A continuous production device for processing modified asphalt using ultrasonic technology, characterized in that: The system includes a building-type frame (1), which is divided into an upper and a lower layer. From left to right, the building-type frame (1) is equipped with a modifier feeding hopper (2). The modifier feeding hopper (2) is fixedly installed on the upper layer. The modifier feeding hopper (2) is connected to one of the inlets of a premixing tank (3) via a spiral rising pipe (10). The premixing tank (3) has two inlets at its upper end. The other inlet of the premixing tank (3) is connected to an external feeding pipe (4). The premixing tank (3) is fixedly installed on the lower layer by a support frame and extends to the upper layer. The outlet of the premixing tank (3) is connected to the inlet of a colloid mill (5) via a pipe. The colloid mill (5) is located on the lower layer. The outlet of the colloid mill (5) is connected to the inlets of two ultrasonic reactors (6) via pipes. The ultrasonic reactor (6) is fixedly installed on the lower layer by a support frame. Half of the body of the ultrasonic reactor (6) is set on the upper layer and the other half is placed on the lower layer. The two ultrasonic reactors (6) are arranged longitudinally. The discharge ports of the two ultrasonic reactors (6) are connected to the inlet of the development tank (7) through pipes. The development tank (7) is fixedly installed on the lower layer by a support frame and extends to the upper layer. The premix tank (3), the ultrasonic reactor (6) and the development tank (7) are all equipped with heat insulation components (8). The heat insulation components (8) are filled with heat transfer oil in the pipes inside. The machine cabinet (9) is also included. The machine cabinet (9) is fixedly installed on the leftmost side of the lower layer. The machine cabinet (9) is used for power control of the spiral rising pipe (10), the premix tank (3), the colloid mill (5), the ultrasonic reactor (6) and the development tank (7). The ultrasonic reactor (6) has a vertical cylindrical structure. An agitator (11) is installed inside the ultrasonic reactor (6). The agitator (11) is connected to the output shaft of a stepper motor (12) via a coupling. The stepper motor (12) is fixedly installed on the top cover of the ultrasonic reactor (6). Four ultrasonic tool heads (13) are provided inside the ultrasonic reactor (6). The four ultrasonic tool heads (13) are evenly distributed in a circular array with the agitator (11) as the center and are fixedly installed on the top cover of the ultrasonic reactor (6). An ultrasonic generator (14) is provided on the ultrasonic tool head (13). The feed ports of the two ultrasonic reactors (6) are connected to the discharge port of the colloid mill (5) through a common pipe. The discharge port of the ultrasonic reactor (6) is connected to the feed port of the development tank (7) through a common pipe.

2. The continuous production device for processing modified asphalt using ultrasonic technology according to claim 1, characterized in that: A first asphalt pump (15) is installed between the colloid mill (5) and the two ultrasonic reactors (6), and a second asphalt pump (16) is installed between the two ultrasonic reactors (6) and the development tank (7). Both the first asphalt pump (15) and the second asphalt pump (16) are connected to the chassis cabinet (9).

3. The continuous production device for processing modified asphalt using ultrasonic technology according to claim 1, characterized in that: The inlet and outlet of the premix tank (3), the inlet and outlet of the colloid mill (5), the inlet and outlet of the two ultrasonic reactors (6) and the inlet and outlet of the development tank (7) are all equipped with pneumatic butterfly valves (17) and flow meters (18). The pneumatic butterfly valves (17) and flow meters (18) are all connected to the chassis cabinet (9).

4. The continuous production device for processing modified asphalt using ultrasonic technology according to claim 1, characterized in that: Pressure sensors and level sensors are installed at the bottom of the premix tank (3), the bottom of the two ultrasonic reactors (6) and the bottom of the development tank (7). Temperature sensors are installed at the top of the premix tank (3), the top of the two ultrasonic reactors (6) and the top of the development tank (7). The pressure sensors, level sensors and temperature sensors are all connected to the cabinet (9).

5. The continuous production device for processing modified asphalt using ultrasonic technology according to claim 1, characterized in that: The external feed pipe (4) is configured as a double-layer feed pipe. The inner layer of the external feed pipe (4) is configured as a material feed pipe. The material feed pipe is connected to one of the feed ports of the premix tank (3) through a pipe. The outer layer of the external feed pipe (4) is configured as a heat-conducting oil pipe. The heat-conducting oil pipe is connected to the insulation component (8) outside the premix tank through a pipe.

6. A continuous production apparatus and method for processing modified asphalt using ultrasonic technology, based on any one of claims 2-5, characterized in that, Includes the following steps: Step 1: Through the external feed pipe (4) and the spiral rising pipe (10), the pre-insulated base asphalt and polymer modifier, such as rubber powder, are continuously and stably fed into the premix tank (3) in a set ratio. During this process, the amount of asphalt and modifier added is monitored and measured in real time by the flow meter (18) and the pressure sensor, and the monitoring data is transmitted to the cabinet (9) to ensure accurate mixing ratio. Step 2: The premix tank (3) is heated by the heat insulation component (8) to make the base asphalt reach the physical modification temperature. The temperature sensor and the cabinet (9) are used to provide real-time temperature feedback and control of the premix tank (3). The base asphalt is input into the premix tank (3), the weighed polymer is added, the cabinet (9) starts the stirring operation in the premix tank (3), and the mixture is subjected to high-intensity shear emulsification. The pre-mixed modified asphalt is input into the colloid mill (5) through the pipeline. The weight of the modified asphalt is measured by the flow meter (18) and the pressure sensor. Step 3: The colloid mill (5) is heated to the temperature of physical modification of asphalt by the heat preservation device. The modified asphalt is fed into the colloid mill (5) according to the temperature sensor in real time. The colloid mill (5) performs deep grinding and shearing of the material by high speed to further reduce the particle size of polymer particles and improve their distribution uniformity. After shearing, the colloid mill (5) is shut down and the mixed modified asphalt is fed into two ultrasonic reactors (6) through the No. 1 asphalt pump (15). The amount of asphalt and modifier added is monitored and measured in real time by the flow meter (18) and pressure sensor to ensure accurate proportioning. Step 4: The internal temperature of the ultrasonic reactor (6) is raised to the physical modification temperature of asphalt by the heat preservation device. The temperature is monitored in real time by the temperature sensor and fed back to the cabinet (9). The modified asphalt is input into the two ultrasonic reactors (6) through the pipeline. The stepper motor (12) is started to shear emulsify and ultrasonically treat the mixture of base asphalt and polymer. The cavitation effect generated by the ultrasonic wave provides huge local energy at the microscale, which works synergistically with the mechanical shearing to achieve ultrafine dispersion of polymer and strengthen the interface bonding. After shearing and ultrasonic treatment, the cabinet (9) shuts down the two ultrasonic reactors (6) and inputs the mixed modified asphalt into the development tank (7) through the No. 2 asphalt pump (16). The temperature of the development tank (7) is reduced to the swelling temperature. The temperature is monitored in real time by the temperature sensor to allow the polymer molecular chains to fully extend, swell and fuse in the asphalt, and finally obtain a polymer modified asphalt product with stable storage and excellent performance.

7. The continuous production device and method for processing modified asphalt using ultrasonic technology according to claim 6, characterized in that: The mass percentage of the polymer modifier to the base asphalt is set as follows: 15.3% polymer modifier and 74.7% base asphalt, with the sum of the mass percentages of the above components being 100%.

8. The continuous production device and method for processing modified asphalt using ultrasonic technology according to claim 6, characterized in that: The physical modification temperature is set to 120–200℃.

9. The continuous production device and method for processing modified asphalt using ultrasonic technology according to claim 6, characterized in that: The motor speed of the premix tank (3) is set to 1000 rpm, the stirring time of the premix tank (3) is set to 60-75 min, the motor speed of the colloid mill (5) is set to 4000 rpm, the stepper motor (12) of the ultrasonic reactor (6) is set to 200 rpm, the frequency of the ultrasonic generator (14) is set to 20-35 kHz, and the working time of the stepper motor (12) and the ultrasonic generator (14) is set to 10-60 min.

10. The continuous production apparatus and method for processing modified asphalt using ultrasonic technology according to claim 6, characterized in that: The swelling temperature of the development tank (7) is set to 100-150℃, and the swelling time is 10-30 min.

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