JP2805190B2 - Asphalt mixture production equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt mixture manufacturing apparatus provided with a recycling plant capable of heating and regenerating asphalt pavement waste materials to an asphalt plant for producing asphalt mixtures as road pavement materials.

[0002]

2. Description of the Related Art Waste asphalt pavement material (hereinafter referred to as "waste material") excavated by road construction or the like is heated and regenerated and reused as an asphalt mixture. A dryer having almost the same structure as that of the asphalt plant that heats the air is often used.

[0003]

However, when waste material to which asphalt is adhered is heated by a waste material dryer, a bad odor gas is generated depending on the heating conditions, causing a bad odor around the plant, which cannot be ignored in terms of pollution. May cause.

In view of the above, the present invention proposes an asphalt mixture production apparatus for deodorizing odor gas discharged from a waste material dryer.

[0005]

In order to achieve the above object, the present invention provides a new material dryer for heating a new aggregate and a waste material dryer for heating a waste material, wherein the new material dryer includes a burner flame and a waste material. A combustion chamber for contacting odor gas derived from a dryer is provided. The combustion chamber includes an outer cylinder and an inner cylinder having a predetermined length, and the odor gas is introduced into the inner cylinder from the outer cylinder side. While a large number of slits are formed, the exhaust pipe of the waste material dryer is connected to the outer cylinder, and the exhaust gas passing through the inner cylinder is led into the new material dryer.

[0006]

In the asphalt mixture manufacturing apparatus according to the present invention, the odor gas generated from the waste material dryer when the waste material is heated is introduced into the combustion chamber of the new material dryer. At this time, the odor gas is first introduced into the outer cylinder of the combustion chamber, and is introduced into the inner cylinder through a number of slits formed in the inner cylinder while passing through the gap between the outer cylinder and the inner cylinder. A flame is formed in the inner cylinder, and the odor gas that has passed through the many slits is dispersed around the flame and comes into contact with the flame in the inner cylinder. When it comes into contact with the odor gas flame, the odor components contained in the odor gas are ignited and burned and decomposed into carbon dioxide gas and water vapor. The decomposed odor components lose odor and are deodorized.

Further, when the odor gas is introduced into the combustion chamber, the odor gas passes through the gap between the outer cylinder and the inner cylinder, so that the inner cylinder is cooled by the odor gas and the combustion chamber is heated more than necessary. To prevent

[0008]

An embodiment of the present invention will be described below with reference to the drawings.

1 is a new material dryer for heating a new aggregate, 2
Reference numeral 3 denotes a waste material dryer that heats the waste material, and 3 denotes a dust collector that captures dust contained in exhaust gas derived from the new material dryer 1.

The new material dryer 1 rotatably inclines and supports a cylindrical drum 4 by a support roller 6 disposed on a machine base 5 and rotates the drum 4 at a predetermined speed by a driving device (not shown). A large number of scraping blades are arranged inside the drum 4, and the new aggregate sent by the aggregate transport device (not shown) is scraped up by the scraping blades, and the inside of the drum 4 is dropped while falling in a curtain shape. Roll down. Then, the burner 7 is burned to form a flame in the combustion chamber 8, and a high-temperature gas flow passing through the drum 4 is maintained by being sucked by the exhaust fan 10 disposed at the end of the exhaust flue 9 connected to the drum 4. Then, the aggregate is heated to a predetermined temperature by the hot air.

Exhaust gas discharged from the drum 4 passes through the exhaust flue 9 and is introduced into the dust collecting device 3. After dust in the exhaust gas is captured, the exhaust gas passes through the exhaust fan 10 and enters the atmosphere from the chimney 11. Released. The heated aggregate discharged from the drum 4 is lifted by a vertical transport device (not shown), transferred to the upper part of the plant body, stored in an aggregate storage bin for each particle size, and used as a material of the asphalt mixture. .

The waste material dryer 2 has substantially the same structure as the new material dryer 1, and is rotatable by a support roller 14 in which a cylindrical drum 12 in which a number of scraping blades are disposed is mounted on a machine base 13. , And can be rotated at a predetermined speed by a driving device (not shown).

A burner 15 is provided at one end of the drum 12.
A flame is formed in a combustion chamber 16 disposed in front of the burner 15 to feed hot air into the drum 12, and exhaust gas is sucked by an exhaust fan 18 disposed in an exhaust flue 17. Waste material conveying device (not shown) disposed on the burner 15 side while maintaining the gas flow passing through the inside of the drum 12
The waste material is supplied to the inside of the drum 12 and heated to a predetermined temperature while being rolled down in the drum while being scraped up by the scraping blades and temporarily stored in the waste material hopper 19.

The heated waste material temporarily stored in the waste material hopper 19 is discharged to a lower mixer (not shown) by a predetermined amount, mixed and adjusted, and then the recycled waste material is set on a side portion of the plant body. It is transported and stored in a waste material storage bin (not shown), and is shipped as an asphalt mixture of 100% waste material, or is mixed with a predetermined amount of asphalt mixture produced in the main body of the plant for use.

When the waste material to which the asphalt component adheres is heated in the waste material dryer 2, an odor and bull smoke are generated.
This odor gas is led out of the drum 12 through the exhaust flue 17, but the exhaust flue 17 is connected to the combustion chamber 8 of the new material dryer 1 in order to burn and deodorize the odor gas.
It is burned by the burner 7 of the new material dryer 1 to decompose it into carbon dioxide gas and water vapor for odorless treatment.

FIG. 2 is a partially cutaway perspective view of the combustion chamber 8, which is constituted by a cylindrical outer cylinder 20 with both sides closed, and a frusto-conical inner cylinder 21 disposed therein. I have. The end of the burner 7 is inserted into one end of the outer cylinder 20 so as to form a flame toward the inside of the inner cylinder 21, and the other end of the outer cylinder 20 has an odor generated from the waste material dryer 2. An exhaust flue 17 serving as a gas passage is connected.

The end of the inner cylinder 21 on the small diameter side is closed, and a number of slits 22 are formed in the inner cylinder 21. Therefore, most of the odor gas introduced into the combustion chamber 8 from the exhaust flue 17 passes through the slit 22 and passes through the inner cylinder 21.
And is brought into contact with the flame of the burner 7 to burn and decompose odorous components. The high-temperature gas generated in the combustion chamber 8 is led out from a lead-out pipe 23 disposed through the outer cylinder 20,
It is fed into the drum 4 of the new material dryer 1.

There is a slight gap between the outer cylinder 20 of the combustion chamber 8 and the large diameter portion of the inner cylinder 21, and a part of the odor gas introduced into the combustion chamber 8 passes through the gap. Care is taken to cool the cylinder 21 from the outside.

FIG. 3 shows another embodiment of the combustion chamber for deodorizing odorous gas. The same reference numerals as in FIG. 2 denote the same components. In this embodiment, the burner 7 and the new material dryer 1 are linearly arranged, and the exhaust flue 17
Are fixed on both sides inside the outer cylinder 24 of the combustion chamber 8 to which are connected, and a large number of slits 27 are formed between the circular plates 25 and 26. The inner cylinder 28 is fixed.

Therefore, the odorous gas introduced from the exhaust flue 17 into the combustion chamber 8 is introduced between the outer cylinder 24 and the inner cylinder 28, passes through a number of slits 27 and enters the inner cylinder 28, The stench component is burned and decomposed by contact with the flame of the burner 7. Then, the high temperature gas that has passed through the inner cylinder 28 is sent into the drum 4 of the new material dryer 1.

When the asphalt-adhered waste material is heated by the waste material dryer 2, the odorous exhaust gas passes through the exhaust flue 17 to the downstream, and flows into the new material dryer 1.
Into the combustion chamber 8. The odor gas introduced into the combustion chamber 8 is first introduced into the outer cylinder 24 of the combustion chamber 8,
From 4, it passes through the slit 27 of the inner cylinder 21 and is dispersed around the flame of the burner 7. The odor gas dispersed around the flame comes into contact with the flame, the odor component burns and ignites, and is decomposed into carbon dioxide gas and water vapor to perform odorless treatment.

[0022]

As described above, in the asphalt mixture producing apparatus according to the present invention, the combustion chamber 8 of the new material dryer 1 into which the odor gas generated from the waste material dryer 2 is fed is formed by the outer cylinder 24 and the inner cylinder 21. The odor gas introduced into the combustion chamber 8 passes through the slit of the inner cylinder 21 so that the burner 7
Can be dispersed around the flame, and the odor component can be brought into contact with the flame to burn and ignite, and the odor component of the odor gas generated from the waste material dryer 2 can be decomposed to have no odor. Can be prevented from drifting.

Further, since a part of the odor gas introduced into the combustion chamber 8 passes through the gap between the outer cylinder 24 and the inner cylinder 21, the inner cylinder 21 can be cooled from the outside, and the combustion chamber 8 is overheated. Can be prevented, and the life of the combustion chamber 8 can be prolonged.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of an asphalt mixture production apparatus according to the present invention.

FIG. 2 is an enlarged perspective view of a combustion chamber with a partial cutout.

FIG. 3 is an enlarged perspective view, partially cut away, of another embodiment of the combustion chamber.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 ... New material dryer 2 ... Waste material dryer 3 ... Dust collection device 7 ... Burner 8 ... Combustion chamber 9 ... Exhaust flue 10 ... Exhaust gas 15 ... Burner 17 ... Exhaust flue 18 ... Exhaust gas 19 ... Waste material hopper 20 ... Outer cylinder Reference numeral 21: inner cylinder 22: slit 23: outlet pipe 24: outer cylinder 25, 26: circular plate 27: slit 28: inner cylinder

Claims (1)

(57) [Claims] A new material dryer for heating new aggregate and a waste material dryer for heating waste material are provided, and the new material dryer is provided with a combustion chamber for contacting a burner flame with an odor gas derived from the waste material dryer. The combustion chamber includes an outer cylinder and an inner cylinder having a predetermined length. The inner cylinder is provided with a number of slits for introducing odor gas into the inner cylinder from the outer cylinder side, while the outer cylinder has the waste material dryer. An asphalt mixture producing apparatus, wherein the exhaust flue is connected to the exhaust pipe and the exhaust gas passing through the inner cylinder is led into the new material dryer.