Bituminous pavement recycled material separation and regeneration system

Abstract

The utility model discloses a separation and regeneration system for a recycled material of an asphalt pavement. The separation and regeneration system comprises a feeding device, a first fine screening device, a sizing device and a separation device, the system disclosed by the utility model can complete separation or fine screening of an asphalt pavement recycled material doped with super-large particle size and caking at one time (without material returning), and remove an asphalt film with coarse particle size, so that 90% of asphalt in the asphalt pavement recycled material is a 0-3mm grade finished product material, and the mixing amount of plant-mixed heat regeneration RAP can reach 100%; and the device can be used for road conditions such as upper, middle and lower surface layers of expressways or first-grade roads, so that the economic benefits and the social benefits are remarkably improved.

Description

Technical Field

[0001] The utility model belongs to a separation and regeneration system, in particular to a separation and regeneration system for recycled materials of an asphalt pavement. Background Art

[0002] At present, waste asphalt pavement materials (RAP) are mainly used in the middle and lower layers of roads, and the utilization rate is generally below 30%. The main reason is that the stone and asphalt in the old materials exist in the form of "agglomerates", and the false particle size phenomenon is serious, resulting in the variation of the mixture gradation, poor fusion of new and old asphalt, and the presence of "black stone" in the mixture, which seriously affects the high and low temperature and water stability of the recycled asphalt mixture, making it difficult to be used on a large scale in the asphalt surface layer of high-grade highways.

[0003] In view of the problems of low RAP utilization rate and large variability, the fine separation and screening of RAP is particularly important. RAP that has been pre-treated by fine separation has better quality and can be used in various asphalt layers of high-grade highways. At the same time, it can greatly increase the proportion of factory-mixed hot recycled RAP and the performance of the mixture, with significant economic and social benefits.

[0004] Prior art CN202223303439.0 discloses a waste asphalt pavement material separation and regeneration system. It can separate and screen waste asphalt pavement materials below 200mm by means of secondary separation and tertiary screening. However, the particle size of the waste asphalt pavement material after primary separation is difficult to control. The material after primary separation and the first-grade material after secondary separation screening need to be returned for repeated separation and screening, which reduces the output and increases energy consumption. In addition, only four kinds of finished materials can be obtained by fine screening; furthermore, waste asphalt pavement materials with super large particle sizes of 50-200mm entering the material bin are easy to block the material bin discharge port, and problems such as material jamming and material leakage will occur when passing through the lifting device. Utility Model Content

[0005] Purpose of the utility model: The technical problem to be solved by the utility model is to provide a separation and regeneration system for recycled asphalt pavement materials mixed with oversized particles and agglomerates on the basis of no return of materials, and before separation and regeneration, several grades of finished materials without false particle sizes can be screened out in advance, thereby improving the production capacity of the entire system.

[0006] Technical solution: The utility model of the asphalt pavement recycling material separation and regeneration system includes:

[0007] A feeding device, used for loading the asphalt pavement recycled materials and screening the asphalt pavement recycled materials of different particle sizes to achieve size-divided output;

[0008] The first fine screening device is connected to the feeding device to screen the asphalt pavement recycling materials output by the size classification to obtain screening materials that meet the particle size requirements;

[0009] A granulation device, connected with the first fine screening device to crush the screened material to be crushed into asphalt pavement recycling materials of specified specifications;

[0010] The separation device is connected with the granulation device to separate the stone and asphalt from the crushed asphalt pavement recycling material.

[0011] Furthermore, the system also includes a second fine screening device connected to the separation device to screen and obtain fine materials that meet the particle size requirements.

[0012] Furthermore, the first fine screening device and the feeding device of the system are connected through the first conveying device and the second conveying device respectively, the feed ports of the first conveying device and the second conveying device correspond to the diameter-dividing output ports of the feeding device, and the discharge ports of the first conveying device and the second conveying device are connected to the feed port of the first fine screening device.

[0013] Furthermore, the bottom end of the first fine screening device of the system is respectively provided with a plurality of discharge conveying devices, and the discharge port corresponding to the screened material to be crushed is connected with the feed port of the granulation device. Furthermore, the feeding device of the system includes a material bin with discharge ports at the bottom and sides, a screen provided in the material bin, a vibrator provided on the screen, and a time-delay vibrator provided on the bin body of the material bin, the discharge port at the side is connected with the first conveying device, and the discharge port at the bottom is connected with the second conveying device.

[0014] Furthermore, the feeding device of the system also includes a speed-adjustable conveying device located at the bottom discharge port, and the discharge port of the speed-adjustable conveying device is connected to the feed port of the second conveying device.

[0015] Furthermore, the granulation device of the system is connected to the separation device through a conveying device, wherein the feed end of the conveying device is connected to the discharge end of the granulation device, and the discharge end of the conveying device is connected to the feed end of the separation device.

[0016] Furthermore, the granulation device of the system is connected to the separation device through a conveying device and a lifting device, wherein the feed end of the conveying device is connected to the discharge end of the granulation device, the discharge end of the conveying device is connected to the feed end of the lifting device, and the discharge end of the lifting device is connected to the feed end of the separation device.

[0017] Furthermore, the second fine screening device of the system is located on one side of the separation device, and the granulation device is connected to the separation device through a conveying device, wherein the feed end of the conveying device is connected to the discharge end of the granulation device, and the discharge end of the conveying device is connected to the feed end of the separation device, and the separation device is then connected to the second fine screening device through the conveying device.

[0018] Furthermore, the granulation device of the system is connected to the separation device through a conveying device and a lifting device, wherein the feed end of the conveying device is connected to the discharge end of the granulation device, the discharge end of the conveying device is connected to the feed end of the lifting device, and the discharge end of the lifting device is connected to the feed end of the separation device. The second fine screening device is located at the lower end of the separation device, and its feed port is connected to the discharge port of the separation device.

[0019] Furthermore, the system also includes a dust removal device for centralized treatment of dust.

[0020] Beneficial effects: Compared with the prior art, the advantages of the utility model are: the system can complete the separation or fine screening of asphalt pavement recycled materials mixed with super-large particles and agglomerates at one time (without returning materials), and remove the asphalt film of coarse particles, so that 90% of the asphalt in the asphalt pavement recycled materials is in the 0-3mm range, and the addition amount of factory-mixed hot recycled RAP can reach 100%, and it can be used for road conditions such as the upper, middle and lower layers of expressways or first-class highways, which significantly improves the economic and social benefits; and through the first fine screening device, several grades of finished materials without false particle sizes are screened out in advance, thereby improving the production capacity of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the front view of Embodiment 1 of the system;

[0022] Figure 2 It is a rear view of embodiment 1 of the present system;

[0023] Figure 3 It is a left view of embodiment 1 of the system;

[0024] Figure 4 It is a right view of embodiment 1 of the present system;

[0025] Figure 5 This is the front view of Embodiment 2 of the system;

[0026] Figure 6 It is a rear view of embodiment 2 of the present system;

[0027] Figure 7 It is a left view of embodiment 2 of the present system;

[0028] Figure 8 This is the right view of embodiment 2 of the system. DETAILED DESCRIPTION

[0029] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] It should be noted that the devices used in the utility model can all be purchased from the market. Among them, the feeding device 1 is composed of an existing material bin, a speed-adjusting conveying device 9, a screen and a vibrator. The dust removal device 12 is composed of a dust collector and a screw conveyor. The granulating device 3 can be a double-roll crusher; the separation device 4 can be a vertical shaft impact crusher; the first fine screening device 2 and the second fine screening device 5 are relaxation screens, and the difference lies in the different specifications of the screened materials; the conveying device 10 is a belt conveyor, and the conveying device 10 can also be equipped with a metering device (a known component) to measure the production capacity in real time, and the metering data is counted by the control system; the lifting device 11 is a hoist; the speed-adjusting conveying device 9 is a speed-adjusting belt conveyor. The above are all commonly used equipment known in the art and can be directly purchased from the open market without any relevant structural improvements. Among them, the models of some equipment can be shown in Table 1 below, but are not limited to this type.

[0031] In addition, the granulation device 3 used in the present invention can crush materials with specifications below 25mm or 30mm to enter the separation device 4 to remove the asphalt film. The first fine screening device 2 used can screen 3 fine materials of different specifications, namely 0-3mm, 3-5mm and screening materials above 5mm. The second fine screening device 5 used can screen 5 fine materials of different specifications, namely 0-3mm, 3-5mm, 5-10mm, 10-15mm, and 15-25mm or 15-30mm. In addition, when the separation and regeneration system of the present invention is used, if it is necessary to screen materials of specifications other than those of the present invention, the setting of the discharge particle size of the granulation device 3 and the replacement of the sieve plates of the first fine screening device 2 and the second screening device 5 can be done accordingly, and it is not limited to the specification requirements listed in the present invention.

[0032] Table 1 Device Model Table

[0033] Serial number Part Name Device Model 1 Speed ​​​​adjustable belt conveyor TD75B8000*8M 2 Grain setting machine 2PGY1210 3 Hoist NE150-18M 4 Separator HVI0818 5 Fly screen CZS1560 6 dust collector PPCS64-4 7 Belt conveyor TD75B500*10M 8 Screw Conveyor LS300

[0034] Example 1

[0035] like Figures 1 to 4As shown, the asphalt pavement recycling material separation and regeneration system of this embodiment 1 mainly includes a feeding device 1, a first fine screening device 2, a granulation device 3, a separation device 4 and a PLC control system 13 for regulating the operation of the entire system. Among them, the feeding device 1 includes a material bin, a screen arranged in the material bin, a vibrator arranged on the screen, and a delayed vibrator arranged on the material bin body. The vibrator is preferably a group installed at the center of the screen to play a fast screening function. The delayed vibrator is preferably two groups to avoid the arching phenomenon of the asphalt pavement recycling material. A discharge port is opened at the bottom of the material bin to output the screened asphalt pavement recycling material. The side end of the material bin is provided with a discharge port, so as to output the unscreened asphalt pavement recycled materials, which can not only load the asphalt pavement recycled materials but also screen the asphalt pavement recycled materials of different particle sizes to achieve size-separated output. The screening specifications can be asphalt pavement recycled materials above 100mm and asphalt pavement recycled materials below 100mm. Of course, it is not limited to this specification. The screen can be replaced according to the actual situation to meet the particle size requirements of the corresponding specifications. The use of the feeding device 1 to perform preliminary screening of the asphalt pavement recycled materials can effectively prevent large pieces of asphalt pavement recycled materials from entering the material bin and blocking the discharge port, affecting the discharge effect of the material bin. A speed regulating conveying device 9 is also provided at the discharge port corresponding to the bottom of the material bin, and the output is regulated by the rotation speed of the speed regulating conveying device 9.

[0036] The discharge port at the side end of the feeding device 1 is connected to the feed port of the first conveying device 6, that is, the asphalt pavement recycled materials with large particle sizes are directly transported through the first conveying device 6. The discharge port of the speed-adjusting conveying device 9 at the bottom end of the feeding device 1 is connected to the feed port of the second conveying device 7, that is, the asphalt pavement recycled materials with small particle sizes after preliminary screening are directly transported through the second conveying device 7 to achieve layered transportation of particles of different sizes.

[0037] The discharge ports of the first transmission device 6 and the second transmission device 7 are connected to the first fine screening device 2 to perform preliminary screening on the asphalt pavement recycling materials on the first transmission device 6 and the second transmission device 7, which can be screened into 0-3mm finished materials, 3-5mm finished materials and asphalt pavement recycling materials above 5mm. Of course, it is also not limited to this specification. The screen can be replaced according to the actual situation to meet the particle size requirements of the corresponding specifications. The 0-3mm and 3-5mm finished materials are stored and collected by the discharge conveying device 8 for subsequent use. The asphalt pavement recycling materials above 5mm enter the particle size setting device 3 through the conveying device 10 to set the asphalt pavement recycling materials to a uniform particle size and then perform subsequent separation of stone and asphalt to achieve one-time separation and regeneration without return of materials. The discharge port of the particle size setting device 3 is provided with a conveying device 10, through which the asphalt pavement recycling materials crushed into a certain specification are separated into stone and asphalt in the next process.

[0038] The separation operation can be set as a building structure or a flat structure, and the difference between the two lies in the different transmission devices. Specifically, if the separation operation is set as a building structure, the lifting device 11 is connected to the discharge port of the conveying device 10 of the granulating device 3, and the crushed asphalt pavement recycling material is transported to the separation device 4 through the lifting device 11. If the separation operation is set as a flat structure, it can be directly transported to the separation device 4 through the conveying device 10 of the granulating device 3, that is, there is no need for a lifting transmission process. The feed port of the separation device 4 is connected to the lifting device 11 or the transmission device 10, and its discharge port is directly connected to the discharge conveying device 8 through a chute, so that the separation and regeneration of the asphalt pavement recycling material can be achieved.

[0039] Example 2

[0040] like Figures 5 to 8 As shown, the difference between this embodiment 2 and embodiment 1 is that after separation by the separation device 4, the second fine screening device 5 is further used to finely screen the separated stones, and the fine screening specifications can be 0-3mm, 3-5mm, 5-10mm, 10-15mm, and 15-25mm or 15-30mm five-grade stones, and they can be transported to the finished product warehouse by the discharge conveying device 8 respectively. If a building-type separation operation is adopted, the second fine screening device 5 can be located at the lower end of the separation device 4, and the two can be directly connected or connected by a chute. If a flat-laying structure separation operation is adopted, the second fine screening device 5 can be located on one side of the separation device 4, and the two can be connected by a conveying device 10.

[0041] Regardless of the above embodiment 1 or embodiment 2, the conveying device 10 used in the system can be further equipped with an iron remover 14 to prevent the iron in the asphalt pavement recycling material from damaging subsequent equipment. A flat-laying structure separation operation is adopted. In order to make the separation device 4 and the second fine screening device 5 work on the ground, the conveying device 10 can be replaced with a second transmission device 7. And in order to achieve a negative pressure dust-free state for the entire system, a dust removal device 12 is also provided. The dust removal device 12 includes a dust collector and a screw conveyor. The discharge port of the storage bin of the dust collector is connected to the 0-3mm discharge conveying device through a screw conveyor, and the dust collected by the dust collector is transported to the 0-3mm fine finished product bin.

[0042] In addition, if the separation and regeneration system of the present invention adopts a building structure, it can be equipped with a lifting platform 15 for easy inspection and maintenance. In order to realize the automated production operation of the entire system, the operation of each device is regulated by a matching PLC control system 13.

Claims

1. A system for separating and regenerating recycled materials from asphalt pavement, characterized in that: The system includes: A feeding device (1) is used to load the asphalt pavement recycled materials and screen the asphalt pavement recycled materials of different particle sizes to achieve size-separated output; A first fine screening device (2) is connected to the feeding device (1) to screen the asphalt pavement recycling material output by the size classification to obtain screening material that meets the particle size requirements; A granulation device (3) connected to the first fine screening device (2) to crush the screened material to be crushed into asphalt pavement recycling materials of specified specifications; The separation device (4) is connected to the granulation device (3) to separate the stone and asphalt from the crushed asphalt pavement recycling material.

2. The asphalt pavement recycling material separation and regeneration system according to claim 1, characterized in that: The system also includes a second fine screening device (5) connected to the separation device (4) for screening to obtain fine materials that meet the particle size requirements.

3. The asphalt pavement recycling material separation and regeneration system according to claim 1 or 2, characterized in that: The first fine screening device (2) and the feeding device (1) are connected via a first conveying device (6) and a second conveying device (7) respectively; the feeding ports of the first conveying device (6) and the second conveying device (7) correspond to the diameter-dividing output ports of the feeding device (1); and the discharging ports of the first conveying device (6) and the second conveying device (7) are connected to the feeding port of the first fine screening device (2).

4. The asphalt pavement recycling material separation and regeneration system according to claim 1 or 2, characterized in that: A plurality of discharge conveying devices (8) are respectively arranged at the bottom end of the first fine screening device (2), and the discharge ports corresponding to the screened materials to be crushed are connected to the feed ports of the granulation device (3).

5. The asphalt pavement recycling material separation and regeneration system according to claim 3 is characterized in that: The feeding device (1) comprises a material bin with discharge ports at the bottom and the side, a screen arranged in the material bin, a vibrator arranged on the screen, and a delayed vibrator arranged on the bin body of the material bin, the discharge port at the side being connected to the first conveying device (6), and the discharge port at the bottom being connected to the second conveying device (7).

6. The asphalt pavement recycling material separation and regeneration system according to claim 5, characterized in that: The feeding device (1) further comprises a speed regulating conveying device (9) located at the bottom discharge port, and the discharge port of the speed regulating conveying device (9) is connected to the feed port of the second conveying device (7).

7. The asphalt pavement recycling material separation and regeneration system according to claim 1, characterized in that: The granulation device (3) is connected to the separation device (4) via a conveying device (10), wherein the feed end of the conveying device (10) is connected to the discharge end of the granulation device (3), and the discharge end of the conveying device (10) is connected to the feed end of the separation device (4).

8. The asphalt pavement recycling material separation and regeneration system according to claim 1, characterized in that: The granulation device (3) is connected to the separation device (4) via a conveying device (10) and a lifting device (11), wherein the feed end of the conveying device (10) is connected to the discharge end of the granulation device (3), the discharge end of the conveying device (10) is connected to the feed end of the lifting device (11), and the discharge end of the lifting device (11) is connected to the feed end of the separation device (4).

9. The asphalt pavement recycling material separation and regeneration system according to claim 2, characterized in that: The second fine screening device (5) is located on one side of the separation device (4), and the granulation device (3) is connected to the separation device (4) through a conveying device (10), wherein the feed end of the conveying device (10) is connected to the discharge end of the granulation device (3), and the discharge end of the conveying device (10) is connected to the feed end of the separation device (4), and the separation device (4) is further connected to the second fine screening device (5) through the conveying device (10).

10. The asphalt pavement recycling material separation and regeneration system according to claim 2, characterized in that: The granulation device (3) is connected to the separation device (4) through a conveying device (10) and a lifting device (11), wherein the feed end of the conveying device (10) is connected to the discharge end of the granulation device (3), the discharge end of the conveying device (10) is connected to the feed end of the lifting device (11), and the discharge end of the lifting device (11) is connected to the feed end of the separation device (4). The second fine screening device (5) is located at the lower end of the separation device (4), and its feed port is connected to the discharge port of the separation device (4).

Images