JPH072652Y2 - Dryer for recycling asphalt pavement waste - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a dryer for heating and regenerating waste asphalt pavement excavated by road construction and the like according to the present invention.

[Prior Art] A dryer having almost the same structure as a dryer for heating a new aggregate of an asphalt plant is used to recycle asphalt pavement waste material (hereinafter referred to as "waste material") dug up by road construction or the like. This regeneration dryer rotatably supports a cylindrical drum and is fed from a burner while rolling down the waste material while scraping up waste material by a large number of scraping blades provided around the inner circumference of the drum. The waste material is regenerated by bringing it into contact with hot air and heating to a desired temperature.

[Problems to be solved by the invention] However, as the waste material rolls and flows down while being heated, the asphalt adhering to the surface of the waste material melts and the waste material becomes sticky. The waste material gradually adheres to and grows on the scraping blade, and eventually the function of the scraping blade is impaired. Then, in order to remove the adhered and deposited waste material, it is necessary for an operator to enter the narrow drum and perform the shaving work, which is a problem in terms of maintenance.

SUMMARY OF THE INVENTION In view of the above points, the present invention has an object to provide a dryer for asphalt pavement waste material recycling dryer, which enables waste material removal work to be easily performed from outside the drum even if waste material adheres and accumulates on the material scraping section. .

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a drum peripheral wall in a dryer for recycling asphalt pavement waste material having a large number of scraping blades on the inner peripheral portion of a drum rotatably supported in an inclined manner. The present invention provides a dryer for recycling asphalt pavement waste material, characterized in that slits are formed at appropriate positions at appropriate intervals, and a material carrier having a bulge outward from the outer peripheral portion of the drum is attached to the slits.

[Operation] In the dryer for recycling asphalt pavement waste material according to the present invention, the waste material supplied into the drum rolls down while being heated, and when it reaches the slit position punched in the drum, it passes through the slit to store the material. It falls into the carrier and is lifted up as the drum rotates. Then, as the material carrier moves to the upper part, the waste material in the material carrier is gradually dropped, and the material carrier serves as a scraping blade.

When the waste material adheres and accumulates on the material carrier, the material carrier is removed from the outside of the drum, and the work of removing the adhered material is performed outside the drum.

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

Reference numeral 1 denotes a dryer capable of heating a new aggregate and a waste material, which comprises a cylindrical drum 2 and a support roller 4 on a machine base 3.
Is tilted and supported by a drive device (not shown)
To rotate at a predetermined speed. A burner 5 is arranged at one end of the drum 2, and a flame is formed in the combustion chamber 6 by the burner 5 to send hot air from the hot hopper 7 side into the drum 2 and at the other end of the drum 2. An exhaust fan (not shown) provided at the end of the exhaust flue 9 connected to the cold hopper 8 sucks the exhaust gas to maintain the gas flow passing through the drum 2. And cold hopper 8
A belt conveyor 10 for material supply is arranged on the side,
The material fed to the cold hopper 8 side by the belt conveyor 10 is fed into the drum by the feeding blades 11 and is brought into contact with a high temperature gas stream while being rolled down while being lifted by the scraping blades 12 and heated to a predetermined temperature. There is.

A plurality of slits 13 formed by cutting a steel plate of the drum 2 in an appropriate size are provided at appropriate intervals in the circumferential direction at a position near the material input side of the drum 2 where the waste material is likely to adhere and accumulate. Although two rows of slits 13 are formed in the longitudinal direction of the drum in FIG. 1, several rows may be formed as appropriate.
The position for drilling may be appropriately determined by finding the position where the waste material is easily attached by experience.

A material carrier 14 is attached to the slit 13 so as to cover the slit 13 from the outside of the drum 2. The material carrier 12 is formed by recessing a steel plate such as stainless steel into a bucket shape, and is detachably attached by a bolt / nut 15 with a bulge outward of the drum 2. The material carrier 12 holds the material in the recessed portion and lifts the upper portion thereof, and functions as a scraping blade.
Therefore, the scraping capacity should be appropriately designed in the same manner as the design of the scraping blades according to the dryer's capacity, etc., and the shape should be a structure that minimizes the adhesion of waste material, and the material to which waste material does not easily adhere. The inside may be lined with.

Then, the waste material thrown into the drum is sent to the inside of the drum by the feed blade 11, and when it reaches the position of the material conveying body 14, it passes through the slit 13 formed in the peripheral wall of the drum and drops into the material conveying body 14, It is lifted to the top as it rotates. Then, as the material transfer body 14 moves to the upper part, the waste material in the material transfer body 14 gradually drops and is heated by being brought into contact with the gas flow passing through the inside of the drum. The waste material that has passed through the zone in which the material carrier 14 is arranged is also lifted by the scraping blades 12 at the downstream side and flows to the drum discharge portion while falling so as to interrupt the gas flow, while being heated and heated to a desired temperature. It is.

Then, if the waste material adheres and accumulates on the material carrier 14, the bolts and nuts 15 fixing the material carrier 14 are released to remove the material carrier 14, and the work of removing the deposits is performed outside the drum. Of.

In addition, in the embodiment, the dryer for exclusive use of recycling of waste material is described, but the dryer is not limited to this type of exclusive dryer, and various types of dryers having a structure capable of heating both new aggregate and waste material can also be used as a waste material drum. The same effect can be obtained if the section has the same structure as that of the present invention, and the adoption in such a dryer is included in the present invention unless it deviates from the object of the present invention.

[Effect of the Invention] As described above, in the asphalt pavement waste material recycling dryer according to the present invention, even if the waste material adheres and accumulates on the material carrier 14 that functions as a scraping blade, the material carrier 14 Since it can be removed from the outside of the drum, it is possible to perform the work of removing the deposits without entering the drum where the working environment is bad, and there is an advantage that the workability is improved.

[Brief description of drawings]

FIG. 1 is a schematic front view of a dryer for recycling waste asphalt pavement material according to an embodiment of the present invention, in which a part is cut away, FIG. 2 is a partially enlarged view in the vicinity of the material carrier of FIG. 1, and FIG. It is the sectional view on the AA line of a figure. 1 ... Dryer, 2 ... Drum, 13 ... Slit 14 ... Material carrier

Claims (1)

[Scope of utility model registration request] 1. A drier for asphalt pavement waste material recycling, which has a large number of scraping blades on an inner peripheral portion of a drum rotatably supported by inclination, having slits formed at appropriate positions on a drum peripheral wall at appropriate intervals. A dryer for recycling waste asphalt pavement, characterized in that a material carrier having a bulge outward from the outer peripheral portion of the drum is attached to the.