JPS6158606B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot water asphalt regeneration apparatus.

Recently, there has been a strong social demand for the recycling of asphalt waste, and in response to this, various asphalt recycling devices have been proposed.

Asphalt recycling equipment developed so far includes one that crushes asphalt waste with a crusher, one that heats asphalt waste in a steam atmosphere and separates it into small pieces, and one that heats asphalt waste in hot water and then separates it into small pieces. There is something.

The present invention is an improved hot water type asphalt regeneration device, and an object of the present invention is to provide a hot water type asphalt regeneration device that can save fuel and efficiently separate asphalt waste materials, and is less prone to breakdowns and easy to maintain and inspect. do.

In order to achieve this object, the first invention provides a plurality of rostles installed horizontally in the middle part of the melting tank in the height direction, and hot water jetting pipes or steam for softening asphalt located directly below each rostle. In a hot water asphalt regeneration device comprising a jet pipe, a discharge gate provided below the melting tank, and a conveying device whose lower end is connected to the gate, the bottom of the melting tank is directed toward the gate. a plurality of hot water jetting pipes for flushing are provided along the slope of the bottom of the dissolving tank, and the inside of the dissolving tank and the conveying device is filled with hot water to a position above the rostrum; The asphalt waste material introduced from the upper opening of the melting tank is softened by hot water and steam or hot air that is ejected upward from the asphalt softening hot water jet pipe or steam jet pipe directly below the rostrum, and the softened asphalt waste material is The asphalt on the bottom of the dissolution tank is separated to some extent by the rostle and dropped to the bottom of the dissolution tank, and hot water is vigorously jetted downward from the hot water jetting pipe for washing away provided along the slope of the bottom of the dissolution tank. A hot water asphalt regeneration device characterized in that the waste material is further separated into smaller pieces and at the same time is pushed toward the gate section, and the recycled asphalt mixture thus broken up is transported to the next process by the transport device. The gist is:

Further, the second invention provides a plurality of rostles provided in the intermediate part in the height direction of the melting tank, a hot water spouting pipe or a steam spouting pipe for asphalt softening located directly below each of the rostles, and In a hot water type asphalt regeneration device equipped with a discharge gate provided below and a conveying device whose lower end is connected to the gate, the bottom of the dissolution tank is formed to be inclined toward the gate, A steam blowout pipe for flushing is provided along the slope of the bottom of the melting tank, and hot water is filled inside the melting tank and the conveying device to a position above the rostle, and the asphalt is introduced from the upper opening of the melting tank. The waste material is softened by hot water, steam, or hot air jetted upward from the asphalt softening hot water jet pipe or steam jet pipe directly below the rostol, and the softened asphalt waste material is separated to some extent by the rostol and sent to the bottom of the melting tank. The asphalt waste material on the bottom of the melting tank is separated into smaller pieces by steam or hot air that is vigorously jetted downward from the steam jet pipe for flushing away, which is provided along the slope of the bottom of the melting tank. The gist of the present invention is a hot water type asphalt regeneration apparatus characterized in that the reclaimed asphalt mixture thus broken up is transported to the next process by the transport device.

As described above, in the hot water type asphalt regeneration apparatus of the present invention, the bottom of the dissolution tank is inclined toward the gate, and the asphalt waste on the bottom of the dissolution tank is vigorously flowed away from the hot water jet pipe or the steam jet pipe for washing away the asphalt waste. The hot water, steam, and hot air that jet downwards separate them and push them toward the gate. Therefore, the hot water asphalt regeneration apparatus of the present invention has very few failures, and maintenance and inspection are much simpler than conventional regeneration apparatuses using roll agitators, apron feeders, or screw conveyors.

Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. 1 to 4.

Asphalt waste material is introduced into the melting tank 1 by a skip elevator 12. The inside of the dissolution tank 1 and the bucket elevator 6 are filled with hot water to a considerable depth.

11 is a hoist for a skip elevator.
The skip elevator 12 is omitted in FIGS. 1 and 3.

A plurality of rotors 8 and 9 are provided in the middle part of the melting tank 1 in the height direction. A hot water jetting pipe 2 or a steam jetting pipe 3 for softening asphalt is provided directly below the roasters 8 and 9, respectively. Hot water is vigorously jetted upward from a hot water spouting pipe 2 for asphalt softening to heat the asphalt waste material. In the illustrated example, steam jet pipes 3 and hot water jet pipes 2 for softening asphalt are provided directly below the rostol 9 in alternating rows. Steam or hot air is vigorously jetted upward from the steam jet pipe 3 for softening asphalt.

In the illustrated example, the steam jet pipe 3 is not provided directly below the roistle 8. Further, even if such a steam jet pipe 3 is provided near the upper opening 1c of the melting tank 1, it is not very effective.

The hot water jetting pipe 2 for softening asphalt is made, for example, by forming a hole 2b in the upper side of a pipe 2a, as shown in FIG. The steam jet pipe 3 for asphalt softening is also made in the same manner. The hot water jetting pipe 2 and the steam jetting pipe 3 are spaced sufficiently apart from each other.

Note that the flange 2c (FIG. 4) of the hot water jet pipe 2 and steam jet pipe 3 shown in FIG. 1 is visible.

The roasters 8 and 9 can be pulled out from the side wall of the dissolving tank 1 as needed. In Fig. 1, from the left side wall of the dissolution tank 1 to the rostol 8,
You can pull out a 9. Therefore, even if clogging occurs between the adjacent roasters 8 and 9, it can be easily removed. A rostol hoist 10 is installed above the side wall of the dissolving tank 1 and is used to pull out the rostols 8 and 9.

The bottom portion 1a of the dissolving tank 1 is inclined toward the gate portion 16 so that asphalt waste material can easily slide down. For example, the bottom portion 1a has a vertical cross section that is approximately V-shaped and narrows as it goes downward, and has a cross section that is approximately 45° and slopes downward such that the lowermost end of the bottom portion 1a is the gate portion 1b.
connected with.

A plurality of hot water jetting pipes 2 for flushing are provided slightly above the bottom portion 1a along the slope thereof. These hot water jetting pipes 2 for flushing are arranged in an inclined manner at regular intervals along the bottom surface of the bottom portion 1a. Hot water is vigorously jetted downward (that is, toward the bottom surface) from the hot water jet pipe 2 for flushing away, and the asphalt waste material that has fallen on the bottom part 1a is separated into pieces and washed away toward the gate part 16. Although it is sufficient that the hot water is spouted downward, it is preferable that the hot water be spouted slightly forward (that is, toward the gate portion 1b).

When the asphalt waste material is swept away by the hot water jetted vigorously from the flushing hot water jet pipe 2 and reaches the gate part 1b, an asphalt film is attached to the surface of the aggregate, and the recycled asphalt material is disintegrated. The material is made.

The lower end of a transport device, such as a bucket elevator 6, is connected to the gate portion 1b. The bucket elevator 6 is installed almost vertically. The recycled asphalt mixture that has slid down the bottom portion 1a passes through the gate portion 1b and enters the bucket elevator 6. The recycled asphalt mixture separated into small pieces is transported to the next process by a bucket elevator 6.

A steam jet pipe 3 is also provided at the lower part of the gate part 1b and the bucket elevator 6. This is the gate part 1b and the lower part of the bucket elevator 6a.
There are rotating parts such as gears, and this is to heat them to prevent them from becoming stuck due to hardened asphalt when the plant is out of operation in the winter.

An oversize subdividing device 7 is provided at the exit 6b of the bucket elevator 6.
The oversized recycled asphalt mixture that has not been separated into small enough pieces is further separated by an oversized dividing device 7.

Note that the oversize subdividing device 7 is omitted in FIG.

The hot water spouted into the melting tank 1 from the asphalt softening hot water spouting pipe 2 directly below the roasters 8 and 9 is circulated into the bucket elevator 6 for use. The hot water inside the bucket elevator 6 is supplied by the pump 13.
The hot water is sent to the hot water spouting pipe 2 by. 15 is a filter.

Hot water and fresh water can also be supplied into the dissolution tank 1 from the upper opening 1c of the dissolution tank 1. As the hot water, for example, wet dust collection water from an asphalt cycle plant can be used. This will save fuel. The wet dust collection water of the asphalt cycle plant is pumped up from the cycle plant wet water tank 17 by the pump 16. The wet dust collection water of the asphalt cycle plant is approximately 60℃.

Fresh water is supplied from the valve 18.

Now, to explain the operation, the asphalt waste material is first carried upward by the skip elevator 12 and thrown into the melting tank 1. Asphalt waste is heated and softened with hot water, steam, or hot air, and separated to some extent. and,
The separated asphalt waste material is Rostr 8,9
It passes through and falls to the bottom 1a. The asphalt waste material that has fallen to the bottom part 1a is separated into pieces by the hot water vigorously jetted from the flushing hot water jet pipe 2, and is swept away toward the gate part 1b.

The hot water in the bucket elevator 6 is supplied to the pump 13.
Since the liquid is constantly being discharged by the pump, the inside of the bucket elevator 6 has a negative pressure compared to the inside of the dissolving tank 1. Therefore, the recycled asphalt composite material
It is easily swept away toward the bucket elevator 6 via the

Next, an example of the hot water type asphalt regeneration apparatus of the present invention shown in FIG. 5 will be explained.

In the hot water type asphalt regeneration apparatus shown in FIG. 5, a steam jet pipe 3 for flushing is provided in place of the hot water jet pipe 2 described above, slightly above the bottom 1a of the melting tank. Steam (hot air may also be used) ejected from the steam ejection pipe 3 separates the asphalt waste into pieces and at the same time, the gate part 1b
push towards.

Note that a hot water jetting pipe 2 or a steam jetting pipe 3 for softening asphalt is provided directly below the roasters 8 and 9.

Even if the steam jet pipe 3 is provided near the upper opening 1c of the melting tank 1, it is not very effective. In the embodiment shown in FIG. 5, a hot water jetting pipe 2 for asphalt softening is provided directly below the rostol 8, and a steam jetting pipe 3 for asphalt softening is provided directly below the rostol 9. Steam is sent from the boiler 14 to the steam jet pipe 3. 19 is a vibrating sieve.

Other than what has been explained above, the present invention is the same as the hot water type asphalt regeneration apparatus of the present invention shown in the embodiments shown in FIGS. 1 to 4.

Such an apparatus shown in FIG. 5 can also obtain the same effects as the hot water type asphalt regeneration apparatus shown in FIGS. 1 to 4.

In the embodiment shown in FIG. 6, the bottom portion 1a is designed to constantly vibrate so that the asphalt waste material can be easily separated. The bottom portion 1a is vibrated by a vibration motor 5.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of a hot water type asphalt regeneration device of the present invention, FIG. 2 is a side view showing an example of a hot water type asphalt regeneration device of the present invention, and FIG. 3 is a hot water type asphalt regeneration device of the present invention. FIG. 4 is a plan view showing an example of the hot water jetting pipe used in the present invention. FIG. 5 is an explanatory diagram showing another example of the hot water asphalt regeneration apparatus of the present invention. It is a front view showing still another example of the hot water type asphalt regeneration device of the present invention. 1...Dissolution tank, 2...Hot water spout pipe, 3...
Steam ejection pipe, 5... Vibration motor, 6... Bucket elevator, 7... Oversize subdivision device, 8, 9... Losttle, 10... Hoist for losttall, 11... Hoist for skip elevator, 12... Skip elevator, 13... Pump, 14... Boiler, 15... Filter, 16...
...Pump, 17...Cycle plant wet water tank, 18...Valve, 19...Vibration sieve.

Claims (1)

[Scope of Claims] 1. A plurality of rostles provided horizontally in the middle part of the melting tank in the height direction, a hot water spouting pipe or a steam spouting pipe for asphalt softening located directly below each rostle, and the melting tank. In a hot water type asphalt regeneration device equipped with a discharge gate provided below the tank and a conveyance device whose lower end is connected to the gate, the bottom of the dissolution tank is formed to be inclined toward the gate. At the same time, a plurality of hot water jetting pipes for flushing are provided along the slope of the bottom of the dissolving tank, and hot water is filled inside the dissolving tank and the conveying device to a position above the rostrum, and the top opening of the dissolving tank is filled with hot water to a position above the rostrum. The asphalt waste material inputted from the rostol is softened by hot water and steam or hot air jetted upward from the asphalt softening hot water jet pipe or steam jet pipe directly below the rostol, and the softened asphalt waste material is separated to some extent by the rostol. The asphalt waste material on the bottom of the dissolution tank is further separated into smaller pieces by hot water that is vigorously jetted downward from the hot water jetting pipe for washing away provided along the slope of the bottom of the dissolution tank. A hot water type asphalt regeneration apparatus characterized in that the recycled asphalt mixture is simultaneously swept toward the gate portion and the recycled asphalt mixture thus broken up is conveyed to the next process by the conveyance device. 2. A plurality of rostles provided in the middle part in the height direction of the melting tank, a hot water jetting pipe or a steam jetting pipe for asphalt softening located directly below each rostle, and a discharge pipe provided below the melting tank. In the hot water asphalt regeneration apparatus, the bottom of the dissolving tank is formed to be inclined toward the gate, and the bottom of the dissolving tank is formed to be inclined toward the gate, and the bottom of the dissolving tank is inclined toward the gate. A steam jet pipe for flushing is provided along the melting tank and the conveying device to a position above the rostle, and the asphalt waste material introduced from the upper opening of the melting tank is placed directly below the rostle. The asphalt is softened by hot water, steam, or hot air jetted upward from the hot water spouting pipe or steam spouting pipe for softening the asphalt, and the softened asphalt waste is separated to some extent by the rostle and dropped to the bottom of the melting tank, and then the asphalt is further melted. The asphalt waste material on the bottom of the melting tank is separated into smaller pieces by steam or hot air vigorously jetted downward from the steam blowout pipe for sweeping away, which is installed along the slope of the bottom of the tank, and at the same time, it is swept away toward the gate section. A hot water type asphalt regeneration device characterized in that the recycled asphalt mixture separated into pieces in this manner is transported to the next process by the transport device. 3. The hot water asphalt regeneration apparatus according to claim 1 or 2, wherein the bottom of the dissolution tank is vibrated by a vibration motor.