CN212052193U - A high-quality asphalt mixture coarse aggregate regeneration device based on microwave technology - Google Patents

Abstract

The utility model discloses a high-quality asphalt mixture coarse aggregate regeneration device based on microwave technology. The device comprises a heating separation box, a stirring and screening box and an asphalt recovery box. The heating and separation box is equipped with a rotating screen barrel, a microwave generator and a waveguide. The stirring and screening box is equipped with a high-pressure spray system, a rotating roller with a rough surface, a vibrating screen plate and a blower. The outside of the box is provided with water for the high-pressure spray system. circulating water system. The waste asphalt is separated by microwave heating in the heating separation box, sprayed in the stirring and screening box, and rubbed by the rotating roller to remove the asphalt residue attached to the surface of the aggregate, and obtain high-quality recycled aggregate. The device has a simple structure and is easy to implement, and can effectively separate the aggregate from the asphaltene and its impurities, avoiding the large energy consumption, low efficiency, large aggregate damage and the asphalt mixture can only be used for asphalt pavement regeneration in the traditional separation structure. And other issues.

Description

A high-quality asphalt mixture coarse aggregate regeneration device based on microwave technology

technical field

The utility model relates to the field of construction waste treatment, in particular to a high-quality asphalt mixture aggregate regeneration device based on microwave technology.

Background technique

With the development of technology, Recycling Asphalt Pavement (RAP) has been applied to a certain extent in the field of highway transportation in my country. It is a new asphalt mixture obtained by re-mixing the old asphalt pavement through excavation, recycling, crushing, screening and other processes, and then adding regenerant, new asphalt material, new aggregate, etc. to it in a certain proportion. A set of processes to make it meet certain road performance and re-pave it on the road surface is called the regeneration technology of asphalt pavement. This technology recycles the waste asphalt mixture, which not only reduces the demand for new natural aggregates, but also disposes of the waste asphalt mixture, which has great economic value and environmental protection.

In the current asphalt pavement recycling technology, the waste asphalt mixture is mechanically crushed into products of different particle sizes and sizes, and then it is subjected to cold mixing or hot mixing technology to mix the raw materials according to the requirements of the road grade and add new ones. The raw material becomes a newly configured asphalt mixture and is filled on the road surface to exert road performance. So as to realize the disposal and regeneration of asphalt mixture. However, there are still some problems in the recycling of mixed materials by this technology. 1. When the waste asphalt mixture is directly mechanically crushed, the crushing method is rough and the damage to the aggregate is relatively large, which leads to the reduction of the road performance of the produced recycled mixture. 2. When the mixture is recycled, asphalt is attached to the surface of the aggregate, so that the recovered aggregate can only be used to make recycled asphalt mixture. 3. In the regeneration process of this technology, a large amount of new aggregate still needs to be added, and the economic benefits and environmental protection effects are not significant.

Utility model content

In order to solve the above-mentioned defects in the prior art, the purpose of this utility model is to provide a high-quality asphalt mixture coarse aggregate regeneration device based on microwave technology. It avoids the problems of high energy consumption, low efficiency, large aggregate damage and asphalt mixture can only be used for asphalt pavement regeneration in the traditional separation structure.

The utility model is realized through the following technical solutions.

The embodiment of the present utility model provides a high-quality asphalt mixture coarse aggregate regeneration device based on microwave technology, the device includes a heating separation box, a stirring and screening box, and an asphalt recovery box;

The heating separation box is provided with a rotary screen barrel, and the two ends of the rotary screen barrel are provided with electric revolving doors. The side wall of the heating separation box is respectively provided with a feeding port and an aggregate outlet corresponding to the electric revolving door. The material conveyor belt is connected to the stirring and screening box;

It also includes a PLC control system, a microwave generator, a waveguide and a thermocouple set on the heating and separation box. The PLC control system is connected to the rotary screen barrel, the microwave generator and the waveguide; the lower part of the box is provided with an inclinedly distributed asphalt conveying plate to pass the asphalt. The outlet is connected to the asphalt conveyor belt and the asphalt recovery box;

The mixing and screening box is provided with an inclined baffle that is docked with the aggregate conveyor belt, and the mixing and screening box is divided into a roller mixing chamber and a vibrating screening chamber. The roller mixing chamber is provided with a rotating roller. It includes a high-pressure spray system arranged on the stirring and screening box; the vibrating screening cavity is provided with a vibrating screen plate arranged obliquely, and the lower part of the vibrating screen plate is connected to the discharge port of the stirring and screening box.

For above-mentioned technical scheme, the present utility model also has further preferred scheme:

Preferably, the rotary sieve barrel is a stainless steel hollow cylinder, and the side wall is covered with sieve holes, and the rotary sieve barrel is connected to the output shaft of the motor through the central rotating shaft of the sieve barrel to rotate.

Preferably, the PLC control system is connected to the central rotating shaft of the sieve barrel and the electric revolving door; the electric revolving door and the side wall of the heating separation box are respectively provided with magnetic alignment devices.

Preferably, an electric telescopic rod is connected to the central rotating shaft of the screen barrel.

Preferably, a first vibrator is provided below the asphalt conveying plate.

Preferably, an aggregate receiving baffle is provided at the joint of the aggregate outlet and the outlet of the electric revolving door.

Preferably, the side wall of the stirring and screening box is provided with a feeding port connected to the end of the aggregate conveyor belt, the feeding port is connected to an inclined baffle, and the inclined baffle is connected to the sliding partition on the side wall of the stirring and screening box .

Preferably, a plurality of roller bars are arranged on the surface of the rotating roller, and the length of the roller bars increases sequentially from left to right along the axis of the rotating roller. The rod surface is serrated.

Preferably, the vibrating screen plate is opposite to the inclined baffle plate, the lower part of the vibrating screen plate is provided with a second vibrator, and the vibrating screen plate is provided with pores; Two blowers.

Preferably, the high-pressure spray system includes high-pressure water spray heads arranged at the top and side of the stirring and screening box, the high-pressure water spray heads are connected to a circulating water system, and the circulating water system circulates with the bottom of the vibrating screening cavity through a circulating water pipe The water inlet of the device is connected, and the water tank and the pressurizing equipment are connected in turn through the water pump and the circulating water pipe, and the pressurizing equipment is connected with the high-pressure water spray head.

The utility model has the following beneficial effects due to the adoption of the above technical solutions:

1. Equipped with microwave heating equipment, using the characteristics of asphaltene from solid state to fluid state after the mixture is heated, the centrifugal force generated by the high-speed rotation of the hollow sieve barrel is cleverly used to separate the aggregate from other impurities such as asphalt. The method avoids the damage to the aggregate caused by mechanical vibrating, grinding, crushing and other methods in the traditional process.

2. In the mixing and screening box, a high-pressure water spray system is installed. When the aggregate enters, the water is sprayed to the surface of the aggregate with a higher temperature to form a higher temperature gradient, so that the aggregate and the surface-attached asphaltene are separated. At the same time, the high-pressure water scours the aggregate, which can scour the surface adhering asphaltene. The surface of the roller bar of the roller crusher is rough sawtooth shape, which can make the attached mortar on the surface of the aggregate fall off efficiently. At the same time, the high-pressure water also has the effect of scouring and cleaning the rotating roller, so as to reduce the failure rate and improve the service life.

3. There is a circulating water system in the mixing and screening box, which realizes the recycling of water resources, avoids water pollution, and saves costs and resources.

4. In the present utility model, a PLC system and a control system are provided, which are used to control the microwave generator and the waveguide, and realize the microwave power, irradiation time, opening and closing of the electric revolving door of the rotating sieve barrel, and the angular speed of the sieve barrel in the heating separation box. , rotation time, and other parameters to automatically control the preset operating parameters. Realize the automation of equipment operation, make equipment operation simpler and more convenient, and improve production efficiency.

5. In the whole implementation process of the utility model, the separation of coarse aggregate and asphalt in the asphalt mixture can be realized without adding chemical reagents, so as to obtain high-quality recycled aggregate and recycled asphalt, which improves the added value of the finished product; and the equipment The principle is simple, the operation is easy, and the practical performance is outstanding.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present utility model and constitute a part of this application, and do not constitute an improper limitation to the present utility model. In the accompanying drawings:

Fig. 1 is the structural representation of the utility model;

Figure 2 is a schematic diagram of the electric revolving door rotating at different angles;

3 is a flow chart of the method of the present invention.

In the figure: 1. Heating separation box; 2. Stirring and screening box; 3. Asphalt recovery box; 101. The first blower; Feed inlet; 106. Rotary screen barrel; 107. Electric revolving door; 108. Asphalt conveying plate; 109. First vibrator; 110. Aggregate receiving baffle; 111. Asphalt outlet; 112. Aggregate outlet; 113. Waveguide; 114. Thermocouple; 115. Microwave generator; 116. Aggregate conveyor belt; 117. Asphalt conveyor belt; 201. Motor; 206. Rotating roller; 207. Inclined baffle; 208. Sliding baffle; 209. Vibrating screen plate; 210. Second blower; 211. Second vibrator; 212. Water inlet of water circulation device; 213. Water pump ; 214. Pressurized equipment; 215. Water tank; 216. Water tank inlet.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. The schematic embodiments and descriptions of the present utility model are used to explain the present utility model, but are not intended to limit the present utility model.

As shown in FIG. 1 , an embodiment of the present invention provides a high-quality asphalt mixture aggregate regeneration device based on microwave technology, which includes a heating separation box 1 , a stirring and screening box 2 and an asphalt recovery device 3 . Each box is conveyed by a conveyor belt, each equipment box is provided with a material inlet and a material outlet, and a circulating water system is arranged outside the stirring and screening box.

Among them, for the heating separation box 2, a rotary screen barrel 106 is arranged inside the box body, the side wall of the box body is respectively provided with a feed port 105 and an aggregate outlet 112 corresponding to the rotary screen barrel 106, and the feed port 105 is provided in the box. The left side wall of the body is used for adding asphalt mixture. The rotary screen barrel 106 is a stainless steel hollow cylinder, and the rotary screen barrel 106 is easy to disassemble and can be freely replaced according to actual needs. The side walls are covered with sieve holes, and the aperture is generally set to 2.36mm. Electric revolving doors 107 are provided at both ends of the rotary screen barrel 106, which can be automatically opened and closed to facilitate the entry and exit of mixed materials (aggregates). The electric revolving door 107 is provided with a magnetic alignment device 104, which is located on the side walls of the rotary screen barrel 106 and the heating separation box 1 respectively. Access to the inlet and outlet pads to facilitate the entry and slide out of aggregates.

The rotary screen barrel 106 is supported on the side wall of the heating separation box 1 through the central rotating shaft 102 of the screen barrel connected to the motor, and a motor controlled by the PLC control system 103 is provided outside the heating separation box 1. After the motor works, it drives the screen The central shaft 102 of the barrel rotates, thereby driving the rotary screen barrel 106 to rotate. The central rotating shaft 102 of the screen barrel is controlled by the PLC integrated control system 103. The central rotating shaft 102 of the screen barrel can not only control the rotation of the rotating screen barrel 106, but also push the aggregate inside the screen barrel out of the screen barrel.

An electric telescopic rod is provided at the central rotating shaft 102 of the screen barrel. After a batch of mixed materials is rotated and separated inside the screen barrel, the telescopic rod is extended to lift one end of the screen barrel, so that the bones inside the screen barrel The material leaves the screen barrel.

A thermocouple 114, a microwave generator 115 and a waveguide 113 connected thereto are also provided on the side wall of the heating separation box 1. A protective cover is provided outside the microwave generator 115 to generate microwaves and heat the mixture. A first blower 101 is also provided on the side wall of the box for air exchange inside and outside the box.

Electric revolving doors 107 are provided at both ends of the rotary screen barrel 106, which are closed when the rotary screen barrel is working, and open when the screening work is completed. The internal temperature is monitored in real time in the heated separation box and by thermocouple 114 .

A PLC control system 103 is also provided on the side wall of the box, which is used to control the microwave generator 115 and the waveguide 113 to realize the opening and closing of the electric revolving door 107 for the microwave power, the irradiation time, and the rotating sieve barrel in the heating separation box, and the rotation of the sieve barrel. Angular velocity, rotation time, and other parameters are automatically controlled by preset operating parameters.

The central rotating shaft 102 of the screen barrel is controlled by the PLC integrated control system 103. The central rotating shaft 102 of the screen barrel can not only control the rotation of the rotating screen barrel 106, but also push the aggregate inside the screen barrel out of the screen barrel. The PLC integrated control system 103 is used to control the microwave generator 115 and the waveguide 113 to realize automatic control of preset operating parameters for parameters such as microwave power, irradiation time, rotation angular velocity of the hollow screen barrel, and rotation time in the heating separation box.

As shown in FIG. 2 , it is a schematic diagram of the electric revolving door 107 in a closed state, rotated 30°, rotated 120° and opened.

The outlet of the electric revolving door 107 is connected to an aggregate receiving baffle 110 provided on the aggregate outlet 112 . The aggregate obtained after the rotary separation is completed inside the screen barrel passes through the aggregate receiving baffle 110, then leaves the box from the aggregate outlet 112, and enters the stirring and screening box 2 through the aggregate conveyor belt 116 for further separation.

Just below the rotary screen drum 106 is an asphalt conveying plate 108 with a certain slope, and a first vibrator 109 is arranged below the asphalt conveying plate. The separated asphaltene falls on the asphalt conveying plate 108 , and then leaves the box from the asphalt outlet 111 , and enters the asphalt recovery device 3 through the asphalt conveyor belt 117 .

A feeding port 202 is provided on the side wall of the mixing and screening box 2 , which is connected to the end of the aggregate conveyor belt 116 . A feeding port 202 connected to the end of the aggregate conveyor belt 116 is provided on the side wall of the stirring and screening box 2. The feeding port 202 is connected to an inclined baffle 207, and a sliding baffle 208 is connected to the end of the inclined baffle 207. In order to control the movement of the inclined baffle, the sliding baffle 208 is connected to the side wall of the mixing and screening box 2. When a batch of aggregates is washed and stirred, the baffle is opened, and the movement of the baffle is driven by the movement, so that the baffle is moved. After the operation in the roller mixing chamber is completed, the aggregate can enter the vibrating screen chamber.

The stirring and screening box 2 is divided into upper and lower parts by the inclined baffle 207 and the sliding partition 208, the upper part is the roller mixing chamber, and the lower half is the vibrating screening chamber.

A rotating roller 206 is arranged in the roller stirring chamber, and the rotating roller 206 is driven to rotate by the motor 201 outside the stirring and screening box 2. The surface of the rotating roller 206 is provided with a roller bar 205, and the length of the roller bar 205 is along the rotating roller. The length of the axial direction increases from left to right in order to adapt to the inclination of the inclined baffle. The surface of the roller bar 205 has a rough sawtooth shape, which is conducive to better removing the asphaltene attached to the surface of the aggregate, and can effectively improve the work efficiency of removing impurities.

The upper and side parts of the roller mixing chamber are provided with high-pressure water spray heads 204, which can perform high-pressure washing and cooling of the aggregate inside the chamber to enhance the effect of removing impurities. The service life of the rollers.

In the vibrating screening chamber, there is an inclined vibrating screen plate 209, the aperture size of the screen plate is 2.36mm, the function is to separate the asphalt mixture from the coarse aggregate in it, and screen out the asphalt on the surface of the aggregate. residue. There is a second vibrator 211 in the lower part of the screen plate, which can enhance the screening efficiency. At the top of the vibrating screen plate 209, there is a second blower 210, which can ventilate and dry the aggregate, so as to speed up the air flow on the surface of the aggregate and accelerate the drying process of the aggregate. The aggregate is slid by the inclined sieve plate, and leaves the stirring and screening box 2 through the discharge port 203 .

The water in the stirring and screening box enters the lower filter tank through the sieve holes of the vibrating screen plate 209 and accumulates there. A circulating water system is arranged outside the box body. The water inlet 212 of the water circulation device is set at the filter tank, and the nozzle is provided with a multi-layer filter screen, so as to filter out the impurities in the water filter tank, reduce the damage to the pumping system, and reduce the equipment failure rate. Its pressurizing equipment 214, water pump 213, water tank 215, etc. are located outside the screening box. After being pressurized by the water pump 213, the water is pumped to the external water tank 215 for storage. The upper part of the water tank is provided with a water tank inlet 216 to supplement the water in the water tank. After being pressurized, it is sprayed through the high-pressure water shower head 204 to realize the recycling of water, save water resources, protect the environment and save costs. The high-pressure spraying device is beneficial to better remove the asphaltene adhering to the surface of the aggregate, and at the same time, the roller bar 205 is washed, so as to improve its service life and use efficiency.

As shown in Figure 3, the working process of the present utility model is as follows: after the waste asphalt mixture enters the rotary screen barrel of the heating separation box, the temperature of the mixture is raised by the microwave irradiation of the microwave generator, and the asphaltene gradually softens and gradually changes from a solid state. In a fluid state, the centrifugal force generated by the high-speed rotation of the rotary screen barrel causes the asphaltene to carry other mixtures in the mixture and leave the screen barrel, so that the coarse aggregate remains in the rotary screen barrel, and the aggregate and other substances are realized. separation without causing damage to the aggregate. Subsequently, the asphalt aggregate enters the roller mixing chamber of the mixing and screening box through the aggregate conveyor belt, and the water from the high-pressure water spray head is sprayed on the surface of the aggregate. It promotes the separation of asphalt aggregate and mortar, and high-pressure water also has a certain flushing effect on the asphaltene attached to the surface of the aggregate. In addition, under the action of the rough serrated roller bar friction on the surface of the rotating roller, the asphalt aggregate also accelerates the cleaning of the asphaltene adhering to the surface of the asphalt aggregate and improves the cleaning efficiency. Then the asphalt aggregate enters the vibrating screening cavity, and the asphaltene impurities are separated by vibration, and after leaving the box through the discharge port, high-quality asphalt mixture aggregate is obtained.

The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the present invention, those skilled in the art can make some technical features according to the disclosed technical content without creative work. Replacement and deformation, these replacements and deformations are within the protection scope of the present invention.

Claims (9)

1. A high-quality asphalt mixture coarse aggregate regenerating device based on microwave technology is characterized by comprising a heating separation box (1), a stirring screening box (2) and an asphalt recycling box (3);

a rotary screen barrel (106) is arranged in the heating separation box (1), electric rotary doors (107) are arranged at two ends of the rotary screen barrel (106), a feeding hole (105) and an aggregate outlet (112) which correspond to the electric rotary doors (107) are respectively formed in the side wall of the heating separation box (1), and the aggregate outlet (112) is communicated with the stirring screening box (2) through an aggregate conveying belt (116);

the device also comprises a PLC control system (103), a microwave generator (115), a waveguide (113) and a thermocouple (114) which are arranged on the heating separation box (1), wherein the PLC control system (103) is connected with the rotary sieve barrel (106), the microwave generator (115) and the waveguide (113); the lower part of the box body is provided with an asphalt conveying plate (108) which is distributed in an inclined way and is communicated with an asphalt conveying belt (117) through an asphalt outlet (111) to be connected with an asphalt recycling box (3);

an inclined baffle (207) butted with the aggregate conveying belt (116) is arranged in the stirring screening box (2), the stirring screening box (2) is divided into a roller stirring cavity and a vibrating screening cavity, a rotary roller (206) is arranged in the roller stirring cavity, and the stirring screening box further comprises a high-pressure spraying system arranged on the stirring screening box (2); the vibrating screen cavity is provided with a vibrating screen plate (209) which is obliquely arranged, and the lower part of the vibrating screen plate (209) is communicated with a discharge hole (203) of the stirring screening box.

2. The microwave technology-based high-quality asphalt mixture coarse aggregate regeneration device is characterized in that the rotary screen barrel (106) is a stainless steel hollow cylinder, screen holes are fully distributed on the side wall of the rotary screen barrel, and the rotary screen barrel (106) is connected with an output shaft of a motor to rotate through a central rotating shaft (102) of the rotary screen barrel.

3. The microwave technology-based high-quality asphalt mixture coarse aggregate regeneration device is characterized in that the PLC control system (103) is connected with a sieve barrel central rotating shaft (102) and an electric rotating door (107); magnetic alignment devices (104) are respectively arranged on the electric rotating door (107) and the side wall of the heating separation box (1); an electric telescopic rod is connected on the central rotating shaft (102) of the sieve barrel.

4. The high-quality asphalt mixture coarse aggregate regenerating device based on the microwave technology as claimed in claim 1, characterized in that the first vibrator (109) is arranged below the asphalt conveying plate (108).

5. The microwave technology-based high-quality asphalt mixture coarse aggregate regeneration device is characterized in that an aggregate receiving baffle plate (110) is arranged at the joint of the aggregate outlet (112) and the outlet of the electric revolving door (107).

6. The microwave technology-based high-quality asphalt mixture coarse aggregate regeneration device is characterized in that a feeding port (202) connected with the tail end of an aggregate conveying belt (116) is arranged on the side wall of the stirring and screening box (2), the feeding port (202) is in butt joint with an inclined baffle (207), and the inclined baffle (207) is connected with a sliding partition plate (208) on the side wall of the stirring and screening box (2).

7. The microwave technology-based high-quality asphalt mixture coarse aggregate regeneration device is characterized in that a plurality of roller rods (205) are arranged on the surface of the rotating roller (206), the lengths of the roller rods (205) are sequentially increased from left to right along the axial direction of the rotating roller (206), the rotating surface of the rotating roller (206) formed by the roller rods (205) is consistent with the inclination of the inclined baffle plate (207), and the surface of the roller rods (205) is in a sawtooth shape.

8. The microwave technology-based high-quality asphalt mixture coarse aggregate regeneration device is characterized in that the vibrating screen plate (209) is opposite to the inclined direction of the inclined baffle plate (207), a second vibrator (211) is arranged at the lower part of the vibrating screen plate, and pores are arranged on the vibrating screen plate (209); and a second air blower (210) butted with the upper part of the vibrating screen plate (209) is arranged on the side wall of the vibrating screen cavity.

9. The microwave technology-based high-quality asphalt mixture coarse aggregate regeneration device is characterized in that the high-pressure spraying system comprises high-pressure water spraying heads (204) arranged at the top and the side of the stirring screening box (2), the high-pressure water spraying heads (204) are communicated with a circulating water system, the circulating water system is communicated with a water inlet (212) of a water circulating device at the bottom of the vibrating screening cavity through a circulating water pipe, a water tank (215) and a pressurizing device (214) are sequentially communicated with the circulating water pipe through a water pump (213), and the pressurizing device (214) is communicated with the high-pressure water spraying heads (204).

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