JPH10110408A - Method and device for manufacturing asphalt recycled material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain asphalt component of recycled aggregate from attaching to a drier for recycled aggregate. SOLUTION: When new aggregate, in the form of fine particles, which is dried and heated at a drier 1 for new aggregate and stored in a storage bin 9a, is taken out by a delivery means 31 and fed into a drier 15 so as to be heated together with recycled aggregate, when the recycled aggregate is heated in the drier 15. In this case, asphalt component of the recycled aggregate adheres onto the outer periphery of the new aggregate fed into the drier 15, and hence asphalt, in reduced quantity, is adhered to the drier 15 and bucket conveyor 22. And since the new aggregate having been heated gives its heat to the recycled aggregate, the recycled aggregate is heated rapidly, uniformly and efficiently, and a large quantity of recycled aggregate can be heated so that heating capacity of the drier 15 can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a recycled asphalt mixture by mixing recycled aggregate with new aggregate.

[0002]

2. Description of the Related Art A new aggregate hopper for storing new aggregate and a new aggregate dryer for drying and heating the new aggregate cut from the new aggregate hopper are provided as a device for producing asphalt recycled composite material. A screen for sieving the new aggregate dried and heated by the new aggregate dryer according to particle size, and a plurality of storage bins for storing the new aggregate sieved by the screen according to particle size,
A new aggregate weighing hopper for measuring the new aggregate taken out of the storage bin, a recycled aggregate hopper for containing the recycled aggregate, and a recycled aggregate cut out from the recycled aggregate hopper are heated. A dryer for recycled aggregate, a surge bin for storing recycled aggregate heated by the dryer for recycled aggregate, a measuring hopper for recycled aggregate for measuring recycled aggregate taken out from the surge bin, and the new aggregate And a mixer for mixing new aggregate and recycled aggregate discharged from the measuring hopper for recycled aggregate and the weighing hopper for recycled aggregate are known.

[0003]

In the above-mentioned conventional asphalt plant, the asphalt component of the recycled aggregate adheres to the inside of the dryer for recycled aggregate, the surge bin or the weighing hopper for recycled aggregate and impairs their function. And inconveniences such as difficulty in repair.

[0004] It is an object of the present invention to provide a method and an apparatus for manufacturing an asphalt-recycled mixture capable of reducing the adhesion of asphalt of the recycled aggregate to a dryer and a surge bin for the recycled aggregate.

Another object of the present invention is to provide a method and an apparatus for producing an asphalt-recycled mixture capable of producing an asphalt-recycled mixture by heating the recycled aggregate efficiently.

[0006] Another object of the present invention is to provide a method and apparatus for producing an asphalt reclaimed mixture that can produce a homogeneous asphalt reclaimed mixture by introducing a predetermined amount of new aggregate into a regenerated aggregate dryer. It is to be.

[0007]

In order to achieve one or more of the above-mentioned objects, a method for producing an asphalt regenerated mixture according to the present invention comprises: In the method for producing asphalt recycled mixture, in which the recycled aggregate heated by the aggregate dryer and the asphalt recycled mixture are supplied to the mixer, a part of the new aggregate dried and heated by the new aggregate dryer is used. Into a dryer for recycled aggregate and heated together with the recycled aggregate.

[0008] It is preferable that a required amount of fine aggregate is supplied to a dryer for recycled aggregate. In addition, a predetermined amount of new aggregate is controlled by an output signal of a weighing scale provided in the above-described input path, by controlling an amount of extraction of a new aggregate supplied to the recycled aggregate dryer into an input path. It is preferable to put the aggregate into a dryer for recycled aggregate.

Further, the apparatus for producing asphalt recycled composite material according to the present invention comprises a new aggregate hopper for accommodating new aggregate and a new bone for drying and heating the new aggregate cut out from the new aggregate hopper. A dryer for the aggregate, a screen for sieving the new aggregate dried and heated by the dryer for the new aggregate for each particle size, a plurality of storage bottles for storing the new aggregate sieved for the screen for each particle size, A hopper for recycled aggregate containing the aggregate, a dryer for recycled aggregate heated from the recycled aggregate cut out from the hopper for recycled aggregate, and a recycled aggregate heated by the dryer for recycled aggregate are stored. A surge bin, a weighing device for measuring the new aggregate removed from the storage bin and the recycled aggregate removed from the surge bin, and a mixer for mixing the new aggregate and the recycled aggregate discharged from the weighing device. Asphalt regeneration In the manufacturing equipment of the new aggregate, a part of the new aggregate dried and heated by the new aggregate dryer is cut out by the cutting means, and the input path from the new aggregate dryer to the measuring device is input to the recycled aggregate dryer. It was configured to branch off from the path of the new aggregate.

[0010] It is preferable that the storage bin for storing the fine-grained new aggregate is provided with a cutting means for cutting out the fine-grained new aggregate stored in the storage bin into an input path. In addition, it is desirable that the input path is provided with a weighing scale that measures the cutout weight of the new aggregate and outputs a control signal of the cutout means.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. FIG. 1 and FIG. 2 show one embodiment of an apparatus for producing asphalt recycled mixture according to the present invention. In these figures, reference numeral 1 denotes a dryer for new aggregate. The dryer 1 dries and heats the new aggregate, and is provided with a burner 2 at the lower end side of a rotary drum that is rotatably provided in a circumferential direction in an inclined state. New aggregate hoppers 3a, 3b, 3c, 3d for accommodating new aggregate by particle size are connected to the input manifold at the upper end of the dryer 1 via conveyors 4, 5, such as belt conveyors. The exhaust manifold at the lower end of the dryer 1 has a receiving port 7 for a hot elevator 7.
a is communicated via the chute 6.

Below the discharge chute 7b of the hot elevator 7, a screen 8 and storage bins 9a, 9b, 9c,
9d and a measuring hopper 10 for new aggregate are arranged from the top to the bottom in the above order. The screen 8 is for sieving the new aggregate dried and heated by the new aggregate dryer 1 and discharged from the discharge chute 7b of the hot elevator 7 according to particle size. The storage bins 9a, 9b, 9c and 9d are screens 8
The new aggregate that has been sieved is stored according to particle size. The weighing hopper 10 weighs new aggregate,
A mixer 11 is provided below the mixer.

Reference numeral 15 denotes a dryer for recycled aggregate. The dryer 15 heats the recycled aggregate, and is provided with a burner 16 on the upper end side of a rotating drum that is rotatably provided in a circumferential direction in an inclined state. Recycled aggregate hoppers 17a and 17b, which store the recycled aggregate by type or particle size, are connected to the input manifold at the upper end of the dryer 15 via a conveyor 18.19 such as a belt conveyor.

A surge bin 21 is provided above the recycled aggregate dryer 15, and is connected to a discharge manifold at the lower end of the recycled aggregate dryer 15 via a bucket conveyor 22. The surge bin 21 stores the recycled aggregate heated by the dryer 15 and carried by the bucket of the bucket conveyor 22.

Below the surge bin 21, a weighing hopper 23 for recycled aggregate is provided. Measuring hopper 23 for recycled aggregate
Is a trolley type that can be moved to the left and right.
The recycled aggregate discharged from the mixer can be weighed and introduced into the mixer 11 via the chute 24.

Reference numeral 31 denotes a cutting means such as a screw feeder. The cut-out means 31 is provided in a storage bin 9a for storing fine-grained new aggregate, specifically, sand. The new aggregate can be fed to the recycled aggregate dryer 15 via the extraction chute 32, the extraction conveyor 33 such as a belt conveyor, and the conveyor 18.

The cutout conveyor 33 is provided with a weighing scale 34 such as a conveyor scale for measuring the weight of the new aggregate cut out by the cutting means 31. The weighing scale 34 is connected to a control device (not shown), and measures the speed of a motor 35 such as a gear motor that drives the extracting means 31, that is, the amount of new aggregate extracted per unit time by the extracting means 31. The configuration is such that feedback control can be performed to a predetermined set amount.

Next, the operation of the apparatus for producing asphalt recycled mixture having the above-mentioned structure will be described together with the method for producing asphalt recycled mixture. The new aggregate cut out from the new aggregate hopper 3a or the like into the conveyor 5 is put into the new aggregate dryer 1 by the conveyor 4, and is dried and heated by the hot air of the burner 2. The new aggregate dried and heated by the dryer 1 is conveyed to the screen 8 by the hot elevator 7, where it is sieved and stored in each of the storage bins 9a, 9b, 9c, 9d according to particle size.

On the other hand, the recycled aggregate cut out to the conveyor 19 from the recycled aggregate hopper 17a and the like is put into the recycled aggregate dryer 15 by the conveyor 18, and is heated by the hot air of the burner 16. The recycled aggregate heated by the dryer 15 is transported by the conveyor 22 and stored in the surge bin 21.

The storage bins 9a, 9b, 9c, 9d
The new aggregate stored in the weighing hopper 10 for new aggregate is weighed in the mixer 11, and the recycled aggregate stored in the surge bin 21 is weighed in the weighing hopper 23 for recycled aggregate and supplied to the mixer 11. Can be put in. The mixer 11 mixes the new aggregate and the recycled aggregate to form an asphalt recycled mixture. At this time, asphalt, filler and the like are introduced into the mixer 11 from another system (not shown) and mixed with the new aggregate and the recycled aggregate as necessary, as in the conventional case.

In the present invention, a part of the new aggregate dried and heated by the new aggregate dryer 1, that is, the fine new aggregate stored in the storage bin 9a is recycled by the recycled aggregate dryer 15. When the aggregate is heated, it is cut out by the cutting means 31 and put into the recycled aggregate dryer 15, and heated together with the recycled aggregate.

In this case, the new aggregate put into the recycled aggregate dryer 15 causes the asphalt portion of the recycled aggregate to adhere to the outer peripheral surface of the new aggregate.
Asphalt adhesion to 2 etc. is reduced and alleviated. In addition, since the new aggregate is already heated and gives its own heat to the recycled aggregate, the recycled aggregate can be efficiently and quickly heated evenly, and a large amount of recycled aggregate can be heated. The heating capacity of the dryer 15 for recycled aggregate is improved. Moreover, since the adhesion of the asphalt to the dryer 15 and the like is reduced, a homogeneous asphalt recycled mixture can be manufactured.

FIG. 3 shows another embodiment of the apparatus for producing asphalt recycled mixture according to the present invention. This asphalt plant uses a well-known double dryer in which a recycled aggregate dryer 15 is contained in a new aggregate dryer 1. The burner 2 also works to heat the recycled aggregate. Since other structures and operations are the same as those of the apparatus for manufacturing asphalt recycled mixture of FIGS. 1 and 2, the same reference numerals are given to the respective constituent members and the description thereof is omitted.

In the embodiment shown in the figure, the structure is such that new aggregate is cut out from the fine-grain new aggregate storage bin 9a.
New aggregate may be cut out from any one of the other storage bins 9b, 9c, 9d, or two or more of the storage bins 9a, 9b, 9c, 9d. Also, a new aggregate dryer 1
The new aggregate can be cut out from the chute 6 or the hot elevator 7 or the like which constitutes a path from the hopper 10 to the new aggregate weighing hopper 10. The type and structure of the cutting means 31 can be variously changed in accordance with the cutting position of the new aggregate and the like. For example, an opening / closing damper that changes the cutting amount of the new aggregate depending on the opening degree can be used. it can.

The weighing hopper 10 for new aggregates and the weighing hopper 23 for recycled aggregates constitute a weighing device.
One weighing hopper can be used for both new aggregate and recycled aggregate.

The cutting means 31, the cutting chute 32, and the cutting conveyor 33 constitute a feeding path for the recycled aggregate. However, the components and members of the feeding path are not limited to those shown in the drawings. It is arbitrary and can be variously changed. The new aggregate can be directly supplied to the dryer 15 from the conveyor 33 or the like without passing through the conveyor 18.

[0027]

As described above, the method for producing a recycled asphalt mixture according to the present invention comprises a new aggregate dried and heated by a dryer for new aggregate, and a recycled aggregate heated by the dryer for recycled aggregate. In the method for producing asphalt recycled composite material, in which the raw material is put into a mixer to produce asphalt recycled composite material,
A part of the new aggregate dried and heated by the new aggregate dryer is put into the recycled aggregate dryer and heated together with the recycled aggregate. A new aggregate hopper for storing the aggregate, a new aggregate dryer for drying and heating the new aggregate cut out from the new aggregate hopper, and a new aggregate dried and heated by the new aggregate dryer. A screen for sieving according to particle size, a plurality of storage bins for storing new aggregate sieved by the screen for each particle size, a hopper for recycled aggregate containing recycled aggregate, and a cutout from the hopper for recycled aggregate. A recycled aggregate dryer for heating the recycled aggregate, a surge bin for storing the recycled aggregate heated by the recycled aggregate dryer, a new aggregate taken out from the storage bin, and a regeneration taken out from the surge bin. A weighing device for weighing aggregate; In a manufacturing apparatus for asphalt recycled composite material, comprising a mixer for mixing new aggregate discharged from the apparatus and recycled aggregate, a means for cutting out a part of the new aggregate dried and heated by a dryer for new aggregate. The feeding path for cutting out and feeding into the recycled aggregate dryer is configured to be branched from the new aggregate path from the new aggregate dryer to the measuring device, so that the recycled aggregate dryer and Asphalt adhesion of the recycled aggregate to the surge bin can be reduced, and the recycled aggregate can be efficiently heated to produce an asphalt recycled mixture. Moreover, as described above, the adhesion of the asphalt to the dryer for recycled aggregate and the like is reduced, so that the repair of those devices becomes easy.

In the storage bin for storing the fine-grained new aggregate, there is provided cutting means for cutting out the fine-grained new aggregate stored in the storage bin into an input path, and a required amount of the fine-grained new aggregate is regenerated. By adopting a configuration in which it is put into an aggregate dryer, the adhesion of asphalt to a recycled aggregate dryer or the like can be further reduced.

A weighing scale for measuring the cut weight of the new aggregate and outputting a control signal of the cutting means is provided on the input path, and the new aggregate supplied to the dryer for the recycled aggregate is cut into the input path. If a predetermined amount of new aggregate is supplied to the recycled aggregate dryer by controlling the amount of cut-out of the discharging means by the output signal of the weighing scale provided in the above-described charging path, a uniform asphalt regeneration mixture is obtained. The material can be manufactured smoothly.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of an apparatus for producing asphalt recycled composite material according to the present invention.

FIG. 2 is a detailed view of a cutting unit used in the manufacturing apparatus of FIG.

FIG. 3 is a block diagram showing another embodiment of the asphalt recycled composite material manufacturing apparatus according to the present invention.

[Explanation of symbols]

 1 New Aggregate Dryer 3a, 3b, 3c, 3d New Aggregate Hopper 8 Screen 9a, 9b, 9c, 9d Storage Bin 10 New Aggregate Weighing Hopper (Measuring Device) 11 Mixer 15 Recycled Aggregate Dryer 17a, 17b Recycled Aggregate Hopper 21 Surge Bin 23 Recycled Aggregate Weighing Hopper (Measuring Device) 31 Extraction Means (Injection Path) 32 Extraction Chute (Injection Path) 33 Extraction Conveyor (Injection Path) 34 Weight Scale

Claims (6)

[Claims] 1. An asphalt reclaimed mixture for producing an asphalt reclaimed mixture by charging a new aggregate dried and heated by a new aggregate dryer and a regenerated aggregate heated by a recycled aggregate dryer into a mixer. The method for producing asphalt recycled mixture, characterized in that a part of the new aggregate dried and heated by the dryer for new aggregate is put into the dryer for recycled aggregate and heated together with the recycled aggregate. Method. 2. The method for producing asphalt recycled composite material according to claim 1, wherein a required amount of the fine-grained new aggregate is charged into a recycled aggregate dryer. 3. The amount of cutout of a cutting means for cutting out new aggregate supplied to a dryer for recycled aggregate into an input path is controlled by an output signal of a weighing scale provided in the input path. 3. The method for producing a recycled asphalt mixture according to claim 1, wherein a fixed amount of new aggregate is introduced into a dryer for recycled aggregate. 4. A new aggregate hopper for accommodating new aggregate, a new aggregate dryer for drying and heating the new aggregate cut out from the new aggregate hopper, and a new aggregate dryer for drying. A screen for sieving the heated new aggregate according to particle size, a plurality of storage bins for storing the new aggregate sieved by the screen according to particle size, a hopper for recycled aggregate containing recycled aggregate, A recycled aggregate dryer for heating the recycled aggregate cut out from the aggregate hopper, a surge bin for storing the recycled aggregate heated by the recycled aggregate dryer, and a new aggregate removed from the storage bin And a mixer for measuring the recycled aggregate removed from the surge bin and a mixer for mixing the recycled aggregate and recycled aggregate discharged from the metering device. Dried and heated by a material dryer That the input path for cutting out part of the new aggregate that has been cut out by the cutting means and feeding it to the dryer for recycled aggregate is branched from the path for new aggregate from the dryer for new aggregate to the measuring device. Characteristic equipment for producing asphalt recycled mixture. 5. The storage bin for storing fine-grained new aggregate is provided with a cut-out means for cutting out the fine-grained new aggregate stored in the storage bin into an input path. An apparatus for producing asphalt recycled mixture according to the above. 6. The asphalt regeneration apparatus according to claim 4, wherein a weighing scale for measuring a cutout weight of the new aggregate and outputting a control signal of the cutout means is provided in the input path. Material manufacturing equipment.