JPS5812404B2 - Heating device for recycling asphalt waste material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved heating device for recycling asphalt waste material, which improves thermal efficiency by using a raking blade whose base is embedded in the inner wall surface of a rotating drum, and also improves thermal efficiency between the raking blade and the rotating drum. The asphalt waste material sliding down the inner wall surface through the gap with the inner wall surface can prevent the asphalt waste material from adhering to the inner wall surface of the rotating drum, and can uniformly heat and regenerate the asphalt waste material.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The base portions 3 of a plurality of raking blades 2 are welded or other means at symmetrical positions on the inner wall circumference of the rotary drum 1, which is rotated by an appropriate drive mechanism. The base portions 5 of the plurality of raking blades 4, which are planted in the longitudinal direction and arranged at approximately equal intervals between the plurality of raking blades 2, are bent in the rotational direction of the rotating drum 1, and are attached to the inner wall surface of the rotating drum 1. A gap 6 is maintained between the rotary drum 1 and the base plate 7, which is fixed by welding or other means to the inner wall surface of the rotating drum 1, and both ends of the raking blade 4 are fixed by welding or other means, and both ends are closed. It is shaped like a long box.

A raking blade 2 with a base 3 planted on the inner wall surface of a rotating drum 1
It is shaped like a long box, with both side edges thereof fixed by welding or other means to a support plate 8 which is implanted on the inner wall surface of the rotating drum 1 by welding or other means, and both ends of which are closed.

9 is a chain with both ends fixed to the tip edge of the raking blades 2 and 4, 1
0 is a flue; 11 is a chute for feeding asphalt waste into the rotary drum 1; 12 is a plurality of feeding blades installed at an angle on the inner wall surface of the inlet of the rotary drum 1; and 13 is a discharge of processed asphalt waste. The outlet, 14 is a burner, and 15 is an air suction port whose opening degree can be adjusted.

In the present invention, the rotary drum 1 is rotated in the direction of the arrow A, and hot air from the burner 14 is brought into the rotary drum 1 at an appropriate temperature by outside air flowing through the air suction port 15 whose opening degree is adjusted.

When asphalt waste generated during asphalt pavement resurfacing work is thrown into the rotating drum 1 through the chute 11, the asphalt waste is forcibly fed into the rotating drum 1 by the feed blade 12 and scraped by the raking blades 2, 4. Raised by.

The asphalt waste scraped up by the raking blades 2 falls in its entirety from the tip edge of the raking blades 2 into the rotating drum 1, and is heated and regenerated by hot air gas during its fall.
A part of the asphalt waste scraped up by the scraping blade 4 having a gap 6 between the inner wall surface of the rotary drum 1 and the base 5 slides down on the inner wall surface of the rotary drum 1 through the gap 6, and the rest slides down on the inner wall surface of the rotary drum 1. It falls into the rotating drum 1 from the tip edge of the raking blade 4, and is heated and regenerated by hot air gas while falling.

When the raking blades 2 and 4 are located below, the chain 9 attached to the raking blades 2 and 4 is inside the raking blades 2 and 4 together with the asphalt waste material, and when the raking blades 2 and 4 are located above, the chains 9 are raked up. The asphalt waste is pushed out by the chain 9, and the asphalt waste is scattered by the vibration and rocking of the chain 9, and the asphalt waste is quickly heated and regenerated. This removes asphalt waste.

In the present invention, several raking blades 2 having a base 3 embedded in the inner wall surface of the rotating drum 1 are arranged depending on the diameter of the rotating drum 1. Several rows of blades 16 are provided as necessary.

In the present invention, the bases 3 of a plurality of raking blades 2 are installed in the longitudinal direction of the rotating drum 1 at symmetrical positions on the inner wall surface of the rotating drum 1 through which hot air gas is sent, and the bases 3 of a plurality of raking blades 2 are installed in the middle of the raking blades 2. A plurality of raking blades 4 are adhered to the inner wall surface of the rotary drum 1 at approximately equal intervals in the longitudinal direction of the rotary drum 1, with gaps 6 maintained between the base portions 5 and the inner wall surface of the rotary drum 1. ,
A raking blade 2 with a base 3 planted on the inner wall surface of a rotating drum 1
The asphalt waste material 17 at the bottom is scraped up and uniformly heated and regenerated, and a part of the asphalt waste material scraped up by the scraping blade 4 having a gap 6 between the base 5 and the inner wall surface of the rotating drum 1 is removed from the gap 6. This can prevent the asphalt waste material from sliding down along the inner wall surface of the rotating drum 1 and adhering to the inner wall surface of the rotating drum 1, thereby improving the thermal efficiency within the rotating drum 1 and reducing asphalt waste material due to local overheating of the asphalt waste material. It is very effective in preventing pollution because it prevents the deterioration of asphalt and the generation of blue smock containing harmful gases generated by the combustion of asphalt, and it also prevents the formation of agglomerates of fine particles adhering to the inner wall surface of the rotating drum 1. It is possible to obtain a high-quality recycled composite of asphalt waste.

[Brief explanation of drawings]

Figure 1 is a partially cutaway side view, Figure 2 is A-A of Figure 1.
FIG. 3 is a partially enlarged sectional view taken along the line. 1... Rotating drum, 2, 4... Raising blade, 3, 4... Base,
6... Gap.

Claims (1)

[Claims] 1. The bases of a plurality of raking blades are planted in the longitudinal axis direction of the rotating drum at symmetrical positions on the inner wall circumferential surface of the rotating drum that sends hot air gas, and a plurality of other raking blades are installed in the middle of the raking blades. A heating device for recycling asphalt waste material, comprising blades attached to the inner wall surface of the rotary drum at approximately equal intervals in the longitudinal direction of the rotary drum, with gaps maintained between the base portions of the blades and the inner wall surface of the rotary drum.