CN111364319A

CN111364319A - Vibration centrifugal type asphalt aggregate regeneration device and method based on microwave technology

Info

Publication number: CN111364319A
Application number: CN202010291523.1A
Authority: CN
Inventors: 邵珠山; 郭银波; 刘韡; 乔汝佳; 周航; 袁媛; 郭轩
Original assignee: Xian University of Architecture and Technology
Current assignee: Xian University of Architecture and Technology
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-07-03
Anticipated expiration: 2040-04-14
Also published as: CN111364319B

Abstract

The invention discloses a vibration centrifugal type asphalt aggregate regeneration device and method based on microwave technology, the device comprises a box cover, a box bottom smooth plate and a support frame fixed on the lower part of the box body, the support frame is placed in a smooth rectangular sliding groove, a cylindrical filter screen is arranged in the box body, a rotating shaft, a multi-stage aggregate sieve and a smooth plate are arranged in the filter screen, the multi-stage aggregate sieve and the smooth plate are connected with each other through different struts, and microwave sensors are arranged at the bottom of the rotating shaft and the bottom of the support frame. A cylindrical thin cylinder is distributed between the side wall of the box body and the filter screen, and an outlet is arranged on the side wall of the bottom of the box body. The device adopts microwave heating technology, sieves, heat separation, rescreens the bituminous mixture that the particle size is different in the box, and aggregate and pitch are discharged from respective export respectively, realize pitch aggregate separation collection process. The device has the advantages of flexible and simple structural design, convenient and quick operation, high automation degree and high separation efficiency, is convenient for disassembling parts, and can provide convenience for separating asphalt mixtures for engineering.

Description

Vibration centrifugal type asphalt aggregate regeneration device and method based on microwave technology

Technical Field

The invention relates to the technical field of waste regeneration, in particular to a vibration centrifugal type asphalt aggregate regeneration device and method based on a microwave technology.

Background

At present, thousands of tons of old asphalt mixture are generated in China every year due to pavement maintenance, in order to deal with increasingly serious resource and environmental problems, the recycling of the old asphalt mixture is urgent, the recycling technology of the old asphalt aggregate is concerned, the old asphalt pavement material, part of new aggregate and new asphalt material are properly matched, and the mixture is re-mixed to form the regenerated asphalt aggregate with certain pavement performance under the action of a regenerant and other additives. The method has the environmental protection characteristics of saving resources and manufacturing cost and protecting the ecological environment while creating economic benefits.

The separation of asphalt and aggregate firstly heats the asphalt mixture to soften the asphalt, so that the asphalt and the aggregate are separated, most of the existing heating devices are asphalt heating furnaces and a small number of heating boxes, but the asphalt mixture is in a static state when the devices are heated, so that the asphalt mixture is heated unevenly, the heating efficiency is low, and the separation effect is not good.

The method solves the technical problems and has practical significance for recycling the asphalt mixture.

Disclosure of Invention

In order to solve the defects in the prior art, the invention aims to provide a vibration centrifugal type asphalt aggregate regeneration device and method based on a microwave technology. The invention can separate the aggregate and the asphalt according to a certain particle size and can fully separate the aggregate from the asphalt, thereby solving the problem of recycling the engineering waste asphalt aggregate.

The invention is realized by the following technical scheme.

A vibration centrifugal type asphalt aggregate regeneration device based on microwave technology comprises a box body, a support frame, a bottom plate and a prismatic table support, wherein the box body is arranged on the support frame;

a box cover is arranged at the outer top end of the box body, an outlet is formed in the side wall of the bottom of the box body, a cylindrical filter screen is arranged in the box body, and a plurality of cylindrical thin cylinders connected to the aggregate outlet of the box body are distributed between the side wall of the box body and the filter screen; the filter screen is internally provided with a plurality of aggregate sieves with different apertures and a smooth plate at the bottom in the box body, which are connected by the same rotating shaft, and the smooth plate is butted with the asphalt outlet on the side wall of the box body.

With respect to the above technical solutions, the present invention has a further preferable solution:

preferably, the filter screen is connected with the smooth plate at the top and the bottom of the inner wall of the box body through hooks.

Preferably, the support frame is placed in a smooth sliding groove with a part of the middle hollowed out, and the sliding groove is arranged in the center of the bottom plate.

Preferably, the smooth plate is obliquely arranged in the box body.

Preferably, each grade of aggregate sieve is provided with sieve pores, and the pore diameters of the sieve pores are sequentially reduced from the topmost aggregate sieve to the bottom; gaps are reserved between the aggregate screen and the filter screen, and the gaps are slightly smaller than the diameters of the aggregates at all levels.

Preferably, the aggregate sieves at all stages are connected through first support columns which are uniformly distributed, and the aggregate sieve at the lowest layer is connected with the smooth plate through second support columns which are uniformly distributed; the first support and the second support are both provided with a miniature sensor for controlling the extension and retraction of the supports, and the miniature sensor is electrically connected with a trigger on the bottom plate; each strut is sleeved with an annular cap for removing a small part of asphalt on the outer wall.

Preferably, the second strut length is half the first strut length.

Preferably, the bottom of the rotating shaft is connected with a first microwave inductor, and the bottom of the support frame is provided with a second microwave inductor; the side wall of the support frame is provided with an opening.

Preferably, the side wall of the bottom of the box body is provided with an asphalt outlet, the asphalt outlet is provided with a baffle plate, and a filter screen is arranged.

The embodiment of the invention also provides a vibration centrifugal type asphalt aggregate regeneration method based on the microwave technology, which comprises the following steps:

putting the asphalt mixture to be separated into a box body filter screen, closing a box cover, placing the device in a microwave oven, and triggering the support frame to vibrate left and right in the sliding groove when the temperature reaches the triggering temperature set by the second microwave sensor to drive the box body to vibrate together, so that the aggregate adhered with asphalt is screened for the first time;

when the temperature is increased to the trigger temperature of the first microwave sensor, the trigger rotating shaft drives the aggregate sieve and the filter screen to rotate together, the asphalt mixture absorbs heat and is debonded, and the asphalt penetrates through the filter screen, is thrown to the inner wall of the box body and drips on the smooth plate along the smooth inner wall; asphalt on the filter screen drops on the smooth plate due to self weight, and the rotating shaft stops rotating;

when the temperature in the box body is reduced to a second triggering temperature set by a second microwave inductor, the triggering support frame vibrates left and right in the sliding groove to drive the box body to vibrate together, so that the aggregate is sieved again;

after the screening is finished, the device is taken out of the microwave oven, the trigger is immediately connected to transmit information to the sensor, the left strut in the filter screen is controlled to be shortened, the right strut is controlled to be extended, the extension distance is the same as the shortened distance, the aggregate screen is tightly attached to the thin cylinder, aggregates with different particle sizes are collected at an aggregate outlet, and the baffle is opened at an asphalt outlet to collect asphalt and clear away aggregates with small particle sizes.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

the device applies the microwave heating technology, uniformly heats the asphalt mixture, and quickly separates asphalt and aggregates with different particle sizes through vibration, centrifugation and re-vibration. Aggregate sieve, pillar, pivot, smooth plate and filter screen in the box all can be dismantled to the washing prepares for using next time, also can be according to aggregate gradation change the aggregate sieve of different sieve meshes, satisfies engineering waste recycling's demand. The separated asphalt and aggregate are mixed with part of new aggregate and new asphalt material properly, and under the action of regenerant and other additive, they are mixed again to form regenerated asphalt aggregate with a certain pavement performance. The device has the advantages of flexible and simple structural design, convenient and quick operation, high automation degree and high separation efficiency, is convenient for disassembling parts, and can provide convenience for separating asphalt mixtures for engineering.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention:

FIG. 1 is a schematic structural diagram of a vibration centrifugal type asphalt aggregate regenerating device based on microwave technology;

FIG. 2 is a schematic cross-sectional view taken at A-A in FIG. 1;

in the figure: 1-box body, 2-support frame, 3-bottom plate, 4-filter screen, 5-box cover, 6-first support column, 7-second support column, 8-first-level aggregate screen, 9-annular cap, 10-second-level aggregate screen, 11-third-level aggregate screen, 12-upper hook, 13-lower hook, 14-asphalt outlet, 15-baffle, 16-rotating shaft, 17-cylindrical thin cylinder, 18-aggregate outlet, 19-smooth plate, 20-micro sensor, 21-first microwave inductor, 22-opening, 23-trigger, 24-second microwave inductor, 25-sliding groove, 26-damping plug, 27-frustum support, 28-gasket, 29-filter screen and 30-sieve mesh.

Detailed Description

The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the invention thereto.

As shown in fig. 1, the vibration centrifugal type asphalt aggregate regeneration device based on the microwave technology provided by the embodiment of the invention comprises a box body 1, a support frame 2, a bottom plate 3 and a frustum pyramid support 27, wherein the box body 1 is arranged on the support frame 2, the support frame 2 is arranged in a sliding groove 25 on the bottom plate 3, four corners of the bottom plate 3 are erected on the frustum pyramid support 27, and a gasket 28 with skid resistance is padded at the bottom of the frustum pyramid support 27. Wherein, a second microwave inductor 24 is arranged in a sliding groove 25 at the bottom of the support frame 2, and damping plugs 26 are arranged at the left side and the right side of the sliding groove 25. A trigger 23 controlling the sensor 20 is placed on the base plate 3.

In fig. 1, a box cover 5 is arranged at the outer top end of a box body 1, and a certain gap is reserved between the box cover 5 and the box body 1, so that the gas generated in the heating process can be discharged, and the internal and external pressures can be balanced. The right side wall of the bottom of the tank 1 is provided with an asphalt outlet 14 and is provided with a baffle 15. A cylindrical filter screen 4 is arranged in the box body 1 and used for filtering asphalt and aggregate. The upper edge of the filter screen 4 is connected with the top of the inner wall of the box body 1 through four upper hooks 12, the lower edge of the filter screen 4 is connected with the lower hook 13 fixed on the smooth plate 19, the filter screen 4 is taken down after convenient use for cleaning, and the upper hooks 12 and the lower hooks 13 are symmetrically distributed. Three cylindrical thin cylinders 17 are distributed between the left side of the box body 1 and the filter screen 4 from top to bottom, the three cylindrical thin cylinders 17 are in butt joint with an aggregate outlet 18 which can be opened on the wall of the box body 1, and the diameters of the cylindrical thin cylinders 17 and the aggregate outlet 18 are larger than the diameter of the primary aggregate, so that the smooth discharge of the aggregate is facilitated. Be equipped with in the filter screen 4 and sift 8, second grade aggregate sieve 10, the smooth plate 19 of tertiary aggregate sieve 11 and the interior bottom of box 1 by the one-level aggregate of same pivot 16 connection, the smooth plate 19 exports 14 butt joints with the pitch of box 1 lateral wall, and the slight slope of right of smooth plate 19 makes things convenient for pitch to export 14 discharges from the pitch. And a small-sized screen 29 is provided at the asphalt outlet 14 to filter out fine-sized aggregates in the asphalt.

All levels of aggregate sieves are provided with sieve holes 30, the pore diameters of the sieve holes 30 are sequentially reduced from a first-level aggregate sieve 8, a second-level aggregate sieve 10 to a third-level aggregate sieve 11, the sieve holes are determined according to aggregate gradation, and a gap is reserved between the aggregate sieve and the filter screen 4, so that asphalt stuck on the filter screen 4 can be reserved. The first-stage aggregate sieve 8 is connected with the second-stage aggregate sieve 10, the second-stage aggregate sieve 10 is connected with the third-stage aggregate sieve 11 through four first struts 6, and the third-stage aggregate sieve 11 is connected with the smooth plate 19 through second struts 7; the four supporting columns are uniformly distributed in the circular aggregate sieve, and are distributed as shown in figure 2. The first support 6 and the second support 7 are both provided with a micro sensor 20 for controlling the extension and retraction of the supports, the micro sensor 20 is controlled by a trigger 23 on the upper left of the bottom plate 3, and each support is sleeved with an annular cap 9 for removing a small part of asphalt on the outer wall, so that the supports are prevented from being stuck with asphalt and cannot lift; while the second strut 7 is half the length of the first strut 6 to save resources.

Wherein, the upper part of the supporting frame 2 is a cone, which can be regarded as a whole by being tightly butted with the bottom of the box body 1. A rotating shaft 16 extending into the cavity of the supporting frame 2 is arranged in the cone of the supporting frame, a first microwave inductor 21 is connected to the rotating shaft, and an opening 22 is formed in the side wall of the cone of the supporting frame 2, so that the first microwave inductor 21 connected with the bottom of the rotating shaft 16 can be taken out conveniently. The second microwave inductor 24 is installed in the central region of the bottom of the support frame 2 and is placed in a sliding groove 25 which is smooth and has a rectangular structure with a hollow middle part, the sliding groove 25 is arranged in the center of the bottom plate 3, and damping plugs 26 are arranged on the left side and the right side of the sliding groove 25 to prevent the support frame 2 from impacting the bottom plate 3 in the vibration process. The four corners of the bottom plate 3 are provided with prism table supports 27, and the bottoms of the prism table supports 27 are provided with anti-skid gaskets 28.

All parts of the device are high temperature resistant, except the first microwave inductor 21 and the second microwave inductor 24, other materials do not absorb microwaves, and the microwaves can penetrate through the parts, so that the microwaves are fully absorbed by asphalt aggregates, and the utilization rate of energy is improved. The aggregate sieve, the rotating shaft 16, the

struts

6 and 7 and the filter screen 4 in the box body can be detached, and cleaning operation is convenient. The aggregate sieve can also be changed with different sieve pores according to aggregate gradation, thereby meeting the separation requirements of asphalt mixtures with various gradations. The two microwave inductors are two instruments which are not interfered with each other and have different types; the first microwave inductor 21 only generates a rotation effect, and the second microwave inductor 24 only generates a vibration effect. According to the gradation of the asphalt mixture, the second microwave inductor 24 can set corresponding trigger temperature (trigger power), vibration frequency and vibration time, the second microwave inductor 24 is triggered twice, and the trigger temperature (trigger power), vibration frequency and vibration time of the two times can be different; the first microwave inductor 21 can set the corresponding trigger temperature (trigger power), rotation angular speed and rotation time. Thereby saving energy to the maximum extent. The type of the small-sized filter screen can be determined according to the size of the minimum particle size at the asphalt outlet 14, so that the asphalt does not contain impurities.

The invention realizes the process of separating and collecting the asphalt aggregate by sieving, heating, separating and re-sieving the asphalt mixture with different particle sizes in the box body and respectively discharging the aggregate and the asphalt from respective outlets.

The device is used for separating aggregate and asphalt from the waste asphalt mixture. In the box body, along with the temperature rise, the whole box body structure starts to vibrate to screen the asphalt mixture for the first time, and the mixture falls onto aggregate sieves at different levels. And (4) continuously heating, gradually debonding the aggregate and the asphalt, and finally completely separating under the centrifugal action. And (5) screening the aggregates by vibration again, and discharging the aggregates and the asphalt with different particle sizes from respective outlets after the aggregates and the asphalt are screened.

The working principle of the invention patent is as follows: putting the asphalt mixture to be separated into a box body, closing a box cover, then placing the device in a microwave oven, and starting a power supply of the microwave oven; when the temperature reaches the triggering temperature set by the second microwave sensor, the triggering support frame vibrates left and right in the sliding groove to drive the box body to vibrate together, so that the aggregates adhered with the asphalt are screened for the first time, and the vibration is finished when the set vibration time is reached. When the temperature increases to the trigger temperature of microwave inductor one, trigger the pivot and drive aggregate sieve and filter screen and rotate together, not only make the abundant heat absorption of bituminous mixture debond to because centrifugal action pitch passes the filter screen and is got rid of the box inner wall, on the smooth inboard wall drippage to the smooth plate along glossy, pitch on the filter screen also can reach the live time because the dead weight drippage is on the smooth plate simultaneously, pivot stall. And then, the temperature in the box body begins to be reduced to the second triggering temperature set by the microwave inductor II, the supporting frame is triggered to vibrate left and right in the sliding groove, the box body is driven to vibrate together, and the aggregate is sieved again. After the screening is finished, the device is taken out of the microwave oven, the trigger is immediately connected to transmit information to the sensor to control the left strut in the filter screen to be shortened, the right strut is extended, the extension distance and the shortening distance are the same, so that the aggregate screen is tightly attached to the thin cylinder, aggregates with different particle sizes are collected at an aggregate outlet by the aggregate collecting box, and a baffle is opened at an asphalt outlet to collect asphalt and remove aggregates with fine particle sizes.

The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.

Claims

1. A vibration centrifugal type asphalt aggregate regeneration device based on a microwave technology is characterized by comprising a box body (1), a support frame (2), a bottom plate (3) and a frustum pyramid support (27), wherein the box body (1) is arranged on the support frame (2), the support frame (2) is arranged in a sliding groove (25) on the bottom plate (3), and the bottom plate (3) is erected on the frustum pyramid support (27);

a box cover (5) is arranged at the outer top end of the box body (1), an outlet (14) is formed in the side wall of the bottom of the box body (1), a cylindrical filter screen (4) is arranged in the box body (1), and a plurality of cylindrical thin cylinders (17) connected to aggregate outlets (18) of the box body (1) are distributed between the side wall of the box body (1) and the filter screen (4); the filtering net (4) is internally provided with a plurality of aggregate sieves with different apertures and connected by the same rotating shaft (16) and a smooth plate (19) at the bottom in the box body (1), and the smooth plate (19) is butted with an asphalt outlet (14) on the side wall of the box body (1).

2. A vibratory centrifugal asphalt aggregate regenerating device based on microwave technology as claimed in claim 1, characterized in that, the filter screen (4) is connected with the top and bottom smooth plates (19) of the inner wall of the box body (1) through hooks.

3. A vibratory centrifugal asphalt aggregate regenerating device based on microwave technology according to claim 1, characterized in that the supporting frame (2) is placed in a smooth and partly hollowed sliding groove (25), the sliding groove (25) being centrally arranged in the bottom plate (3).

4. A vibratory centrifugal asphalt aggregate regenerating device based on microwave technology according to claim 1, characterized in that the smoothing plate (19) is arranged obliquely in the box body (1).

5. A vibratory centrifugal asphalt aggregate regeneration device based on microwave technology as claimed in claim 1, wherein each grade of aggregate screen is provided with screen holes (30), and the aperture of each screen hole (30) is reduced from the topmost aggregate screen to the bottom; gaps are reserved between the aggregate screen and the filter screen (4), and the gaps are slightly smaller than the diameters of the aggregates at all levels.

6. A vibratory centrifugal asphalt aggregate regenerating unit based on microwave technology as claimed in claim 1, characterized in that, the aggregate sieves of each stage are connected by uniformly distributed first pillars (6), the lowest aggregate sieve is connected with the smooth plate (19) by uniformly distributed second pillars (7); the first support (6) and the second support (7) are internally provided with a micro sensor (20) for controlling the extension and retraction of the supports, and the micro sensor (20) is electrically connected with a trigger (23) on the bottom plate (3); each strut is sleeved with an annular cap (9) for removing a small part of asphalt on the outer wall.

7. A vibratory centrifugal asphalt aggregate regenerating device based on microwave technology according to claim 6 characterized in that the length of the second leg (7) is half the length of the first leg (6).

8. The vibration centrifugal type asphalt aggregate regenerating device based on the microwave technology as claimed in claim 1, characterized in that the bottom of the rotating shaft (16) is connected with a first microwave inductor (21), and the bottom of the supporting frame (2) is provided with a second microwave inductor (24); an opening (22) is formed in the side wall of the support frame (2).

9. A vibratory centrifugal asphalt aggregate regenerating device based on microwave technology according to claim 1, characterized in that the bottom side wall of the box (1) is provided with an asphalt outlet (14), the asphalt outlet (14) is provided with a baffle (15) and a filter screen (29).

10. A method for regenerating asphalt aggregates by vibratory centrifugal method based on microwave technology, comprising, in an apparatus according to any of claims 1 to 9: