JPH0949207A - Aggregate collection method for asphalt waste material and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently separate and recover aggregate from an asphalt waste material. SOLUTION: Through-holes 14 mounting sieves 16 to them are formed in a hollow member 12 provided in a rotatable manner. A stirring device 46 is provided to a hollow part of the hollow member 12, and the stirring device 46 is operated while rotating the hollow member 12 with rotary driving devices 22 and 34. An asphalt waste material put inside the hollow member 12 is stirred to separate aggregate from the asphalt, and a separate asphalt is dropped from the sieves 16 of the through-holes 14 to separate aggregate therefrom recover.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt waste aggregate-recovering method and apparatus for separating and recovering asphalt and aggregate in asphalt waste.

[0002]

2. Description of the Related Art In recent years, it has been required to recycle construction waste materials such as asphalt waste materials. Conventionally, there were mainly the following three types of recycling. First, asphalt and a large number of aggregates are integrated into a waste material and crushed into an appropriate size with a crusher, (1) mixing into an asphalt plant at room temperature, (2) using as a roadbed material, (3) There was a method of regenerating by heating with a baking oven.

[0003]

In the method of mixing waste materials as they are in the new asphalt mixture of the above-mentioned conventional technology (1), the amount of waste materials added is limited to 20%, so the amount of recycling is small. Met. The above (2)
The method of using as a roadbed material is not limited in the amount of addition, but since the aggregate has a film asphalt, it has a lack of stability in the roadbed strength such as a pitting phenomenon of the roadbed later. Therefore, the selling price was low, and the added value was low for recycling asphalt waste materials. Furthermore, the method (3) of heating and regenerating with the exclusive baking dryer can significantly increase the amount added to the new composite material, and is a high value-added recycling method. However, the exclusive baking dryer has a problem that it requires expensive equipment costs. Therefore, as mentioned above, since there is no cheap and effective recycling method, there is little demand for recycling with respect to the amount of asphalt waste materials generated, the amount of storage for intermediate treatment of industrial waste increases, and further, the final disposal site. It was the current situation that they were dumped in and not recycled.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides a method and an apparatus for collecting aggregates of asphalt waste material, which can efficiently separate and collect the aggregates from the asphalt waste material. The purpose is to do.

[0005]

SUMMARY OF THE INVENTION The present invention is a method for collecting aggregates of asphalt waste material, in which asphalt waste materials are stirred in a hollow member, the asphalt on the surface is peeled off by mutual friction, and the aggregates are separated and collected while sieving. Is.

Further, according to the present invention, a through hole having a sieve is formed in a rotatably provided hollow member, and a stirring device is provided in the hollow portion of the hollow member.
While rotating the hollow member with the rotary drive, the stirring device is operated to stir the asphalt waste material put in the hollow member to separate the asphalt from the aggregate, and the separated asphalt is dropped from the through-hole sieve to remove the aggregate. This is an aggregate collection device for asphalt waste that is separated and collected.

The steel pipe is set horizontally, the sieve has a size that does not allow the aggregate to pass through, and the asphalt peeled from the aggregate has a wire mesh of a size that allows the asphalt to pass through. is there. Further, a shaft for driving a steel pipe that supports the side surface of the steel pipe, and a drive unit that rotates the shaft for driving the steel pipe are provided. A shaft for stirring is inserted in the center of the steel pipe, and a shaft for rotating the shaft for stirring. A drive unit is provided.

In the asphalt waste aggregate collecting apparatus of the present invention, the asphalt waste material in the steel pipe is stirred by rotating the steel pipe and the stirring shaft in opposite directions, and the asphalt in the asphalt waste material is separated from the aggregate by mutual friction. It is what is done. Then, the peeled asphalt falls from the through holes provided with the wire mesh, and the remaining aggregate is separated and collected.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an aggregate recovery apparatus 10 for asphalt waste material according to this embodiment, in which a steel pipe 12 having a length of 9.6 m and an outer diameter of 1.2 m is placed with its center in the longitudinal direction horizontal. This steel pipe 12 is provided with four quadrangular through-holes 14 at 90 ° intervals in the circumferential direction at each place, and the through-holes 14 are horizontally provided at six places at equal intervals, for a total of 24 through-holes. 14 is formed.

A wire mesh 16 cut into a shape slightly larger than the through hole 14 is attached to each through hole 14, and a rod-like wire mesh retainer 18 having a length substantially equal to the horizontal length of the wire mesh 16 is attached to the wire mesh. It is fixed near both horizontal edges of 16. The ends of the wire net holder 18 are fixed to the steel pipe 12 with nuts 20 and bolts (not shown). Wire mesh 1
No. 6 has a total of 16 through holes 14 from one end of the steel pipe 12 to the fourth row in the horizontal direction, and a wire net 16 of 3 mm mesh is used in the fifth row, and a 5 mm mesh in the fifth row.
The wire mesh 16 of 14 mm mesh is used for the row.

Steel pipe driving shafts 22 for supporting the steel pipe 12 are provided on both lower sides of the steel pipe 12 in parallel with the steel pipe 12. The steel pipe driving shaft 22 is provided with five rollers 24 that are in contact with the steel pipe 12 at positions where the through holes 14 are not formed. A bearing 26 that supports the steel pipe driving shaft 22 is attached near the roller 24. The bearing 26 is fixed on its lower surface to a rectangular shaft support portion 28 having an appropriate size. Further, the shaft support portion 28 is fixed to a support member 30 assembled in a frame with a thick structural material, and below the support member 30,
A leg portion 32 having an I-shaped cross section is attached to a position facing the shaft support portion 28 with the support member 30 interposed therebetween.

A drive unit 34 for rotating the steel pipe 12 is provided at a position slightly apart from the steel pipe 12 in the horizontal direction. A part of the support member 30 below the steel pipe 12 is provided with a driving unit 34.
Is extended to a suitable size in the horizontal direction so that the support member 30 can be installed, and a leg portion 32 is provided on the lower surface of the edge portion of the support member 30. A motor case 36 having an appropriate shape is provided on the support member 30, and a motor 40 having a gear 38 is installed in the motor case 36. The steel pipe drive shaft 22 is provided with a shaft gear 42 on the same plane as the gear 38, and the shaft gear 42 and the gear 38 are connected by a chain 44.

At the center of the steel pipe 12, a stirring shaft 46 having a length slightly shorter than that of the steel pipe 12 is provided. On the stirring shaft 46, a pair of blades 48 that are perpendicular to the stirring shaft 46 are attached at several positions at equal intervals, and have a shape suitable for stirring. The stirring shaft 46 is supported by bearings and support members for the stirring shaft (not shown), and is configured to rotate in the opposite direction to the steel pipe 12 by a driving unit for the stirring shaft and a chain (not shown). .

Next, the method of use and operation of this embodiment will be described. FIG. 3 shows a state of use of the aggregate recovery apparatus 10 for asphalt waste material according to this embodiment. The asphalt waste material input port 50 of this apparatus is an opening at the edge near the through hole in which a wire net of 3 mm mesh is fitted.

First, the asphalt waste material 52 that has passed through the crusher is supplied by an apron feeder 54 in fixed amounts. And already, the steel pipe 12 and the stirring shaft 46 are
The crushed asphalt waste material 52 is charged into the asphalt waste material charging port 50 by the belt conveyor 55 while rotating in opposite directions. The supply amount is, for example, 9 tons per hour. By rotating the stirring shaft 46 in the opposite direction to the steel pipe 12, the asphalt waste material 52 is forcibly scraped up and efficiently stirred.

The asphalt waste material 52 peels off the asphalt on the surface due to mutual friction, and the peeled asphalt 5
4 passes through a wire mesh of 3 mm mesh and is deposited on the ground, for example, and is collected by a tire shovel car or the like, or is dropped and collected in a container 56 or the like provided under the through hole in advance. The remaining aggregate 58 is the asphalt waste material 52 that is sequentially added.
It moves to the right in the drawing while being pressed and stirred. Among the aggregates 58, 2.5 to 5.0 mm, that is, the one corresponding to JIS No. 7 crushed stone 60, penetrates a wire mesh of 5 mm mesh, and 5.
0 to 13 mm, that is, the equivalent of JIS No. 6 crushed stone 62 is 14
After passing through the wire mesh of mm mesh, it falls into a container 56 individually provided under each through hole and is collected. The oversized crushed stone 64 that cannot pass through the wire net of 14 mm mesh is extruded from the edge of the steel pipe 12 and falls into the container 56 to be collected.

In this way, the asphalt waste material 52
Can be easily and automatically separated into the peeled asphalt 54 and the aggregate 58, and can be collected in a state of being easily recycled. The recovered peeled asphalt 54 can also be used by adding it within 20% to new asphalt,
In addition, the collected aggregate can be used in the same way as new aggregate and has high added value. Furthermore, the energy used for this recovery is extremely small, and efficient recycling is performed. Moreover, this device has a simple structure, is low in equipment cost and running cost, is easy to maintain, and is effective in increasing the demand for asphalt waste materials.

The asphalt waste material collecting apparatus of the present invention is not limited to the above-described embodiment, and for example, the stirring shaft 34 may be a spiral screw, or a chain may be hung on the shaft. . Further, the size and shape of the steel pipe 12 can be appropriately selected, and the position and number of the through holes 14 and the number of meshes of the wire netting 16 can be appropriately set.

[0019]

The asphalt waste material aggregate collecting apparatus of the present invention has a simple structure and can efficiently separate asphalt and aggregate in the asphalt waste material and collect them respectively. Moreover, the energy required for recovery is extremely small, and energy-efficient recycling is possible.

[Brief description of drawings]

FIG. 1 is a plan view of an aggregate collecting apparatus of an embodiment of asphalt waste material according to the present invention.

FIG. 2 is a sectional view taken along the line AA of this embodiment.

FIG. 3 is a plan view showing a usage state of this embodiment.

[Explanation of symbols]

 10 Aggregate Collection Device 12 Steel Pipe (Hollow Member) 14 Through Hole 16 Wire Mesh (Sieving) 22 Steel Pipe Drive Shaft (Rotation Drive Device) 34 Drive Unit (Rotation Drive Device) 46 Stirring Shaft (Stirring Device)

Claims (3)

[Claims] 1. A method for collecting aggregates of asphalt waste materials, which comprises stirring the asphalt waste materials in a hollow member and separating the asphalt on the surface by mutual friction to separate and collect the aggregates. 2. A rotatably provided hollow member is provided with a through hole having a sieve, and a stirring device is provided in the hollow portion of the hollow member to rotate the hollow member. And rotating the hollow member to operate the stirrer to stir the asphalt waste material placed in the hollow member to separate the asphalt from the aggregate, and drop the separated asphalt from the through-hole sieve to aggregate. An aggregate recovery device for asphalt waste materials, which is characterized by separating and recovering. 3. A steel pipe, which is placed with its major axis substantially horizontal, has a through hole provided with a wire mesh of a size that does not allow aggregates to pass therethrough and that is asphalt separated from the aggregates. A plurality of steel pipe driving shafts that support the side surface of the steel pipe and a drive unit that rotates the steel pipe driving shaft are provided, and the stirring shaft is inserted into the center of the steel pipe and the stirring shaft is rotated. A device for collecting aggregates of asphalt waste material, which is provided with a shaft drive unit.