Waste asphalt pavement material separation and regeneration system

Abstract

The utility model discloses a waste asphalt pavement material separation and regeneration system which comprises a feeding device used for loading waste asphalt pavement materials and screening the waste asphalt pavement materials with different particle sizes so as to realize split-diameter output; the granulating device is connected with the feeding device so as to crush the waste asphalt pavement materials output in a split-diameter manner into the waste asphalt pavement materials with specified specifications; and the separating device is connected with the granulating device so as to separate stones from asphalt from the crushed waste asphalt pavement materials, or the separating device can further comprise a fine screening device which is connected with the separating device so as to screen and obtain fine materials meeting the particle size requirement. The system disclosed by the utility model can complete separation or fine screening of the waste asphalt pavement 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 waste asphalt pavement material is a finished product material with the grade of 0-3mm, the mixing amount of plant-mixed hot-recycling RAP can reach 100%, and the mixing amount of the plant-mixed hot-recycling 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 waste asphalt pavement materials. 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 waste asphalt pavement materials mixed with oversized particles and agglomerates on the basis of no return of materials.

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

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

[0008] A particle size setting device is connected with the feeding device to crush the waste asphalt pavement materials output by diameter into waste asphalt pavement materials of specified specifications;

[0009] The separation device is connected with the granulation device to separate the stone and asphalt from the crushed waste asphalt pavement material.

[0010] Furthermore, the system also includes a fine screening device connected to the separation device to screen and obtain fine materials that meet the particle size requirements.

[0011] Furthermore, the particle setting device and 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 particle setting device.

[0012] Furthermore, the feeding device of the system includes a material bin with discharge ports at the bottom and sides, 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 on the side is connected to the first conveying device, and the discharge port at the bottom is connected to the second conveying device.

[0013] 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.

[0014] 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.

[0015] Furthermore, the particle setting 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 particle setting 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.

[0016] Furthermore, the 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 fine screening device through the conveying device.

[0017] 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, the discharge end of the lifting device is connected to the feed end of the separation device, and the 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.

[0018] Furthermore, the system also includes a dust removal device for centralized treatment of dust.

[0019] Beneficial effects: Compared with the prior art, the advantages of the utility model are: the system can complete the separation or fine screening of waste asphalt pavement 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 waste asphalt pavement materials is in the 0-3mm grade finished material, the factory-mixed hot recycled RAP addition amount can reach 100%, and it can be used for the upper, middle and lower layers of expressways or first-class highways, etc., significantly improving economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the front view of Embodiment 1 of the system;

[0021] Figure 2 It is a rear view of embodiment 1 of the present system;

[0022] Figure 3 It is a left view of embodiment 1 of the system;

[0023] Figure 4 It is a right view of embodiment 1 of the present system;

[0024] Figure 5 This is the front view of Embodiment 2 of the system;

[0025] Figure 6 It is a rear view of embodiment 2 of the present system;

[0026] Figure 7 It is a left view of embodiment 2 of the present system;

[0027] Figure 8 This is the right view of embodiment 2 of the system. DETAILED DESCRIPTION

[0028] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0029] 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 7, a screen and a vibrator. The dust removal device 10 is composed of a dust collector and a screw conveyor. The granulating device 2 can be a toothed roller crusher; the separating device 3 can be a vertical shaft impact crusher; the fine screening device 4 is a relaxation screen; the conveying device 8 is a belt conveyor, and the conveying device 8 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 9 is a hoist; the speed-adjusting conveying device 7 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.

[0030] In addition, the granulation device 2 used in the present invention can crush materials with a specification of 25mm or less than 30mm to enter the separation device 3 to remove the asphalt film. The fine screening device 4 used can screen 5 different specifications of fine materials, 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 with specifications other than those of the present invention, the particle size of the discharge of the granulation device 2 can be set accordingly, and the screen plate of the fine screening device 4 can be replaced, which is not limited to the specification requirements listed in the present invention.

[0031] Table 1 Device Model Table

[0032]

[0033]

[0034] Example 1

[0035] like Figures 1 to 4As shown, the waste asphalt pavement material separation and regeneration system of this embodiment 1 mainly includes a feeding device 1, a granulation device 2, a separation device 3 and a PLC control system 11 for adjusting the operation of the entire system. 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 waste asphalt pavement material. A discharge port is provided at the bottom of the material bin to output the screened waste asphalt pavement material. The side end of the material bin is provided with a discharge port, so as to output the unscreened waste asphalt pavement materials, so as to not only realize the loading of waste asphalt pavement materials but also screen the waste asphalt pavement materials of different particle sizes to realize the output of different particle sizes. The screening specifications can be waste asphalt pavement materials above 100mm and waste asphalt pavement 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 waste asphalt pavement materials can effectively prevent large pieces of waste asphalt pavement materials from entering the material bin and blocking the discharge port, affecting the discharge effect of the material bin. A speed regulating conveying device 7 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 7.

[0036] The discharge port at the side end of the feeding device 1 is connected to the feed port of the first conveying device 5, that is, the waste asphalt pavement materials with large particle sizes are directly transported through the first conveying device 5. The discharge port of the speed-adjusting conveying device 7 at the bottom end of the feeding device 1 is connected to the feed port of the second conveying device 6, that is, the waste asphalt pavement materials with small particle sizes after preliminary screening are directly transported through the second conveying device 6 to achieve layered transportation of particles of different sizes.

[0037] The discharge ports of the first transmission device 5 and the second transmission device 6 are both connected to the particle size setting device 2, through which the waste asphalt pavement materials are set to a uniform particle size and then the subsequent separation of stone and asphalt is carried out to achieve one-time separation and regeneration without return of materials. The discharge port of the first transmission device 5 is provided with a vibration chute, the lower end of which corresponds to the particle size setting device 2, and the discharge port of the particle size setting device 2 is provided with a conveying device 8, through which the waste asphalt pavement materials crushed into a certain size are conveyed to the next process of stone and asphalt separation.

[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 9 is connected to the discharge port of the conveying device 8 of the granulating device 2, and the crushed waste asphalt pavement material is transported to the separation device 3 through the lifting device 9. If the separation operation is set as a flat structure, it can be directly transported to the separation device 3 through the conveying device 8 of the granulating device 2, that is, there is no need for a lifting transmission process. The feed port of the separation device 3 is connected to the lifting device 9 or the transmission device 8, and its discharge port is directly connected to the discharge conveying device 12 through a chute, so that the separation and regeneration of the waste asphalt pavement 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 3, the fine screening device 4 is further used to finely screen the separated stones, and the specifications of the fine screening can be five grades of stones: 0-3mm, 3-5mm, 5-10mm, 10-15mm, and 15-25mm or 15-30mm, and they can be transported to the finished product warehouse by the discharge conveying device 12 respectively. If a building-type separation operation is adopted, the fine screening device 4 can be located at the lower end of the separation device 3, and the two can be connected directly or by a chute. If a flat-laying structure separation operation is adopted, the fine screening device 4 can be located on one side of the separation device 3, and the two can be connected by a conveying device 8.

[0041] Regardless of the above embodiment 1 or embodiment 2, the conveying device 8 used in the system can be further equipped with an iron remover 13 to prevent the iron in the waste asphalt pavement material from damaging subsequent equipment. A flat-laying structure separation operation is adopted. In order to make the separation device 3 and the fine screening device 4 work on the ground, the conveying device 8 can be replaced with a second transmission device 6. And in order to achieve a negative pressure dust-free state for the entire system, a dust removal device 10 is also provided. The dust removal device 10 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 material 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 13 for easy inspection and maintenance. In order to realize the automated production operation of the entire system, the entire system can be equipped with a PLC control system 11 to regulate the operation of each device.

Claims

1. A waste asphalt pavement material separation and regeneration system, characterized in that: The system includes: A feeding device (1) is used to load waste asphalt pavement materials and screen the waste asphalt pavement materials of different particle sizes to achieve size-separated output; The particle size setting device (2) is connected to the feeding device (1) to crush the waste asphalt pavement materials output by diameter separation into waste asphalt pavement materials of specified specifications; the particle size setting device (2) is a toothed roller crusher; The separation device (3) is connected to the granulation device (2) to separate the stone and asphalt from the crushed waste asphalt pavement material.

2. The waste asphalt pavement material separation and regeneration system according to claim 1 is characterized in that: The system also includes a fine screening device (4) connected to the separation device (3) for screening to obtain fine material that meets the particle size requirements.

3. The waste asphalt pavement material separation and regeneration system according to claim 1 or 2, characterized in that: The granulation device (2) and the feeding device (1) are connected via a first conveying device (5) and a second conveying device (6) respectively; the feeding ports of the first conveying device (5) and the second conveying device (6) correspond to the diameter-dividing output ports of the feeding device (1); and the discharge ports of the first conveying device (5) and the second conveying device (6) are connected to the feeding port of the granulation device (2).

4. The waste asphalt pavement 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 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 a first conveying device (5), and the discharge port at the bottom being connected to a second conveying device (6).

5. The waste asphalt pavement material separation and regeneration system according to claim 4 is characterized in that: The feeding device (1) further comprises a speed regulating conveying device (7) located at the bottom discharge port, wherein the discharge port of the speed regulating conveying device (7) is connected to the feed port of the second conveying device (6).

6. The waste asphalt pavement material separation and regeneration system according to claim 1 is characterized in that: The granulation device (2) is connected to the separation device (3) via a conveying device (8), wherein the feed end of the conveying device (8) is connected to the discharge end of the granulation device (2), and the discharge end of the conveying device (8) is connected to the feed end of the separation device (3).

7. The waste asphalt pavement material separation and regeneration system according to claim 1 is characterized in that: The granulation device (2) is connected to the separation device (3) via a conveying device (8) and a lifting device (9), wherein the feed end of the conveying device (8) is connected to the discharge end of the granulation device (2), the discharge end of the conveying device (8) is connected to the feed end of the lifting device (9), and the discharge end of the lifting device (9) is connected to the feed end of the separation device (3).

8. The waste asphalt pavement material separation and regeneration system according to claim 2 is characterized in that: The fine screening device (4) is located on one side of the separation device (3), and the granulation device (2) is connected to the separation device (3) via a conveying device (8), wherein the feed end of the conveying device (8) is connected to the discharge end of the granulation device (2), and the discharge end of the conveying device (8) is connected to the feed end of the separation device (3), and the separation device (3) is further connected to the fine screening device (4) via the conveying device (8).

9. The waste asphalt pavement material separation and regeneration system according to claim 2, characterized in that: The granulation device (2) is connected to the separation device (3) via a conveying device (8) and a lifting device (9), wherein the feed end of the conveying device (8) is connected to the discharge end of the granulation device (2), the discharge end of the conveying device (8) is connected to the feed end of the lifting device (9), and the discharge end of the lifting device (9) is connected to the feed end of the separation device (3). The fine screening device (4) is located at the lower end of the separation device (3), and its feed port is connected to the discharge port of the separation device (3).

10. The waste asphalt pavement material separation and regeneration system according to claim 2, characterized in that: The system also includes a dust removal device (10) for centrally processing the raised dust.

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