JPH10168807A - Recycle drier of asphalt pavement waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the adhesion of an asphalt pavement waste by arranging a scraping blade in the circumferential direction of the drum part inner wall of a recycle drier, and forming its drum part-rotating directional front surface into a curved scraping surface, and the rotating directional rear surface into a slide guide surface formed into an inclined surface. SOLUTION: A scraping blade part formed of first to fourth scraping blade parts is provided between the feeding blade and regenerating material discharge port of a drum body 3. When asphalt pavement waste is put into the drum body 3, the waste is carried on the blocking plate surface of the scraping blade 17, situated in the rotating directional front of the drum part, and moved to the scraping surface 19 of the drum part-rotating directional front surface the base end side of which is fixed to the inner wall of the drum body 3. The waste falls onto the slide guide surface 21 situated in the drum part-rotating directional rear surface when it reaches the upper side by the rotation of the drum body 3, and transferred onto the scraping surface 19 of the scraping blade 17 situated in the rotating directional rear. Thus, the asphalt pavement waste is carried to the discharge port without being adhered to the drum part while scraping, falling and sliding are repeated to the fourth scraping blade 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recycle dryer for waste asphalt pavement for heating and regenerating asphalt pavement waste.

[0002]

2. Description of the Related Art Hitherto, asphalt pavement waste generated when an asphalt pavement is replaced has been heated and regenerated by a rotary drum type recycle dryer a shown in FIGS. 6 and 7 in order to effectively use its resources. .

[0003] In this recycle dryer a,
While rotating the cylindrical drum main body b having its axis inclined and supported, the high-temperature combustion gas from the burner c is sent into the drum main body b, and the asphalt pavement waste material input from the input port d is transferred to the drum main body. While being repeatedly scraped and dropped by the scraping blades e provided in b, the scraping blades are brought into contact with the combustion gas to be stirred and flow toward the discharge port f.

[0006] However, since the scraping blades e are simply provided with a strip-shaped steel material at predetermined intervals in the circumferential direction of the inner wall of the drum body b, the scraping surfaces g of the scraping blades e are provided. And, asphalt pavement waste material adheres and accumulates on the back surface h, and in order to reduce the heating and regeneration efficiency by the rotating drum, a worker enters the drum body b periodically to remove the adhered and accumulated asphalt pavement waste material. Has to be performed, and the removal operation requires a great deal of time and labor.

[0005]

SUMMARY OF THE INVENTION According to the present invention, asphalt pavement waste material adhering to a scraping blade is prevented from sticking by scraping off the scraping material. It is an object of the present invention to provide a recycle dryer for asphalt pavement waste material in which the adhesion phenomenon is reduced.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, such as the necessity of removing asphalt pavement waste, and the like. When the asphalt pavement waste material is scraped up and dropped, it is slid on the upper surface of the asphalt pavement, and the fallen asphalt pavement waste material is slid on the slip guidance surface to lift the asphalt pavement. An object of the present invention is to provide a recycling dryer for asphalt pavement waste material, which aims to prevent asphalt pavement waste material from adhering and accumulating and to eliminate asphalt pavement waste material, thereby solving the above-mentioned problems.

[0007] The above-mentioned recycle dryer has, on the inner wall thereof, a scraping blade portion for scraping up and dropping asphalt pavement waste material, and rotatably supports a drum portion having a material input port and a recycled material discharge port in an inclined manner. .

[0008] The scraping blade portion is composed of a large number of scraping blades, which have a predetermined length in the axial direction of the drum portion and are arranged at predetermined intervals in the circumferential direction of the inner wall of the drum portion. Has been established.

The scraper blade is formed in a hollow shape, and the end face on the raw material input port side is formed in an inclined surface with respect to the recycled material discharge port side.

In addition, the front surface in the rotation direction of the drum portion of the scraping blade is formed in a curved surface to form a top surface, and the rear surface in the rotation direction is formed in an inclined surface up to the inner wall of the drum portion to form a sliding guide surface. Has formed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 is a recycled dryer for asphalt pavement waste according to the present invention. The cylindrical drum main body 3 is rotatably supported by being inclined, and the rotation of the drum main body 3 is controlled at a desired rotational speed by a driving device (not shown).

A cover 4 is provided at one end of the drum body 3 on the upper side of the slope. The cover 4 has a raw material inlet 5 for charging asphalt pavement waste into the drum body 3.
And a combustion burner 6 for feeding high-temperature combustion gas into the drum body 3, while the drum body 3
A lid 7 is also provided on the other end side of the container. The lid 7 is connected to a regenerated material discharge port 8 for discharging the regenerated asphalt material that has been heated and regenerated, and a blower (not shown). An exhaust port 9 for exhausting air is provided to form a drum section 10.

Reference numeral 11 denotes a feed blade. The feed blade 11 is provided in a spiral shape in the circumferential direction of the inner wall of the drum portion 10 on the side of the material input port 5 in the drum body 3. The asphalt pavement waste material introduced from 5 is sent to the recycled material discharge port 8 side.

Reference numeral 12 denotes a scraping feather county.
Are provided between the feed blade 11 in the drum main body 3 and the recycle material discharge port 8, and the first to fourth scraping blade portions 13, 14, 15, 16 are sequentially arranged from the raw material input port 5 side. The drum body 3
In the direction of the axis.

First, as the first scraping blade section 13,
The drum body 3 is constituted by a large number of raking blades 17 arranged at predetermined intervals in the circumferential direction of the inner wall of the drum body 3.

The scraping blades 17 form a strip-shaped member having a predetermined length into a curved surface so as to form a substantially arcuate shape, and a curvature of the curved surface of the scraping plate 18. The center side,
The base end side is fixed to the inner wall of the drum main body 3 so as to be located in front of the drum unit 10 in the rotation direction, and the front surface in the rotation direction of the drum unit 10 is formed as the upper surface 19.

Also, a drum section is provided from the top side of the scraping plate 18.
A sliding plate 20 formed of a gentle curved surface having a curvature larger than the curvature of the raking plate 18 up to the inner wall of the drum body 3 at the rear of the rotation direction of the drum 10 is positioned at the center of the curvature of the curved surface of the sliding plate 20 as a drum portion. The sliding guide 20 is provided rearward in the rotational direction of the sliding plate 20 and forms a sliding guiding surface 21 that forms a rear surface in the rotating direction of the drum unit 10 in an inclined surface shape. A hollow portion is formed on the other side to form a hollow shape.

In addition, a closing plate 22 is provided at an opening at an end of the first scraping blade portion 13 on the side of the material input port 5, and
The end face on the raw material input port 5 side, which is the surface of the closing plate 22, is formed in an inclined surface shape with respect to the recycled material discharge port 8 side.

Further, the second to fourth lifting blades 1 on the downstream side
4, 15 and 16 are formed in substantially the same manner as the first scraping blade portion 13, and are formed in a hollow shape by the scraping plate 18, the sliding plate 20, and the closing plate 22, As for the sliding plate 20, as shown in FIG. 3, a strip-shaped member is formed as the sliding plate 20, and the sliding plate 20 extends from a substantially intermediate position on the rear surface of the scraping plate 18 to the inner wall of the drum body 3. The sliding guide surface 21 may be constituted by the scraping plate 18 and the sliding plate 20.

Further, the first to fourth scraping blades 13,
A closing plate 22a is provided at the opening at the end of the recycled material discharge port 8 at 14, 15, and 16, and the hollow space is closed by the closing plate 22 and the closing plate 22a.

Further, since it is located on the downstream side of the first raking blades 13, the overall size is approximately half of that of the first raking blades 13, and the arrangement pitch in the circumferential direction is also half. And the number of blades is doubled.

The adjacent first to fourth scraping blades 13, 14, 15, and 16 are provided at shifted positions in the circumferential direction to enable a screen-like film made of falling asphalt pavement waste material. It is made as thin as possible, making the passage of combustion gas good.

Next, the operation of the asphalt pavement waste material recycling dryer according to the present invention will be described.
While rotating the drum main body 3 at a predetermined number of revolutions, the combustion burner 6 is operated to send high-temperature combustion gas into the drum main body 3, and the inside of the drum main body 3 is heated until reaching a predetermined temperature. Asphalt pavement waste material to be heated and regenerated sequentially from 5 is charged.

The asphalt pavement waste material that has been thrown in is not lifted up by the divided spiral feed blades 11, but slides on the inner wall below the drum body 3 while being scraped.
It flows upstream of 12.

Thereafter, the asphalt pavement waste material that has reached the first scraping blade section 13 in the scraping blade group 12 slides on the surface of the closing plate 22 of the scraping blade 17 provided on the raw material input port 5 side in an inclined manner. While flowing, moving to the upper surface 19 of the upper plate 18,
From this state, asphalt pavement waste was scraped up,
When the asphalt pavement waste material reaches the upper side due to the rotation of the drum body 3, the asphalt pavement waste material falls while sliding on the scraping surface 19, and from the sliding plate 20 provided on the rear side of the scraping plate 18 of the scraping blade 17 located below. Then, while falling on the sliding guide surface 21 and sliding on the sliding guide surface 21, it moves to the upper surface 19 of the lifting blade 17 located rearward in the next rotation direction.

The asphalt pavement waste in contact with the combustion gas is heated and regenerated while the scraping, dropping, and sliding operations are sequentially repeated up to the fourth raking blades 16, and discharged from the regenerated material outlet 8. .

[0027]

In short, the present invention is directed to a drum section having a raw material input port 5 and a regenerated material discharge port 8 and being rotatably inclined and supported.
In the recycle dryer 1 provided on the inner wall of the recycle dryer 1 with a scraping blade portion 13 for scraping up and dropping asphalt pavement waste material, the scraping blade portion 13 has a predetermined length in the axial direction of the drum portion 10. It is composed of a number of raking blades 17 arranged at predetermined intervals in the circumferential direction of the inner wall.
The front surface in the rotation direction of the drum unit 10 is formed into a curved surface and
19, and the rear surface in the rotational direction of the drum unit 10 is formed into an inclined surface up to the inner wall of the drum unit 10 to form a sliding guide surface 21.
As the asphalt pavement waste material, the scraping surface 19 of the scraping blade 17 is formed in a curved surface, and when falling, it flows while sliding on the scraping surface 19, so that the asphalt pavement waste material is scraped off. As a result, the asphalt pavement waste material that has fallen and flowed from the scraping upper surface 19 falls on the sliding guiding surface 21 of the scraping blade 17, and the sliding guiding surface 21 is formed into an inclined surface. As a result, the asphalt pavement waste material can be prevented from adhering to the sliding guide surface 21 and the scraping surface 19 in the same manner as described above by flowing to the rear of the scraping surface 19 while sliding. Can be eliminated.

Further, in the above-mentioned scraping blade 17, the end face of the scraping blade 17 on the side of the raw material inlet 5 is formed to be inclined with respect to the side of the recycled material discharge port 8. Since the input asphalt pavement waste material flows downstream while sliding on the surface of the obstruction plate 22, even if there is asphalt pavement waste material that is going to adhere to the surface of the obstruction plate 22, the asphalt pavement waste material can be prevented from being adhered by being scraped off. .

Further, in the above-described scraping blade 17, since the scraping blade 17 is formed in a hollow shape, the inside of the scraping blade 17 serves as a hot air pool, thereby increasing the temperature of the scraping blade 17. As a result, the asphalt pavement waste material regeneration efficiency is improved, and the raking blades 17 are uniformly heated, so that the adhesion effect of the asphalt pavement waste material to the raking blades 17 due to a temperature difference can be reduced, and the practical effect is extremely large. It becomes.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a asphalt pavement waste material recycling dryer according to the present invention.

FIG. 2 is a sectional view of a main part taken along line AA of FIG. 1;

FIG. 3 is a cross-sectional view of a main part BB of FIG. 1;

FIG. 4 is a perspective view taken along the arrow CC in FIG. 1;

FIG. 5 is a diagram showing a scraping and falling state of asphalt pavement waste material by a scraping blade.

FIG. 6 is a schematic sectional view of a conventional recycle dryer.

FIG. 7 is a sectional view of a principal part taken along line DD of FIG. 6;

[Explanation of symbols]

 5 Raw material input port 8 Recycled material discharge port 10 Drum section 13 Raising blade section 17 Raising blade 19 Raised upper surface 21 Sliding guide surface

Claims (3)

[Claims] 1. A recycle dryer having a material inlet and a recycle material discharge port, and a scraping blade portion for scraping and dropping asphalt pavement waste material on the inner wall of a rotatably inclined drum part, The blade portion has a predetermined length in the axial direction of the drum portion, and is composed of a large number of raking blades arranged at predetermined intervals in the circumferential direction of the inner wall of the drum portion. Asphalt pavement characterized in that the front surface is formed in a curved shape to form a top surface, and the rear surface in the rotation direction of the drum portion is formed in a slope shape up to the inner wall of the drum portion to form a slip guiding surface. Recycle dryer for waste materials. 2. The asphalt pavement waste material according to claim 1, wherein the end surface of the raking blade on the side of the raw material input port is formed to be inclined with respect to the side of the recycled material discharge port. Recycle dryer. 3. A recycling dryer for asphalt pavement waste material according to claim 1, wherein said scraping blade is formed in a hollow shape.