JPH0423925B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an apparatus for producing asphalt composite material, which is a road paving material, and particularly relates to an apparatus capable of heating and regenerating asphalt pavement waste material.

[Prior art] Asphalt pavement waste material (hereinafter referred to as "waste material") dug up during road construction, etc. has been heated and recycled and used as asphalt composite material, but there are no recycling plants that heat and regenerate this waste material. They are rarely installed independently on factory grounds, and are usually installed alongside an asphalt plant that manufactures new asphalt mixtures.

[Problems to be Solved by the Invention] However, the amount of waste material processed in the recycling plant is very small compared to the amount of mixed material produced in the asphalt plant, and having both plants separately poses a large economic burden. Considering this economical aspect, a device that can heat new aggregate and waste material with a single dryer is desired.

[Means for Solving the Problems] In view of the above-mentioned points, the present invention has been developed in order to solve the above-mentioned problems by installing a burner at one end of the aggregate drum which is rotatably supported at an angle, and a new burner at the other end. A conveyor for supplying aggregate is provided, a waste material drum is inserted from the conveyor side of the aggregate drum and fixed to the aggregate drum, and a burner and a conveyor for supplying waste material are provided at one end of the waste material drum. A discharge passage is provided at the other end in a direction perpendicular to the drum axis, and the discharge passage passes through the aggregate drum wall and opens into an annular passage provided around the outer periphery of the aggregate drum. At the top of the passageway, an exhaust flue is installed that connects to the exhaust flue of the aggregate drum.
An object of the present invention is to provide an asphalt mixture manufacturing apparatus characterized in that a chute is disposed at the lower part of the annular passage.

[Function] According to the present invention, when heating new aggregate and waste material at the same time, the aggregate drum is rotated and hot air is sent into the aggregate drum from an aggregate burner disposed at one end, while New aggregate is supplied from the other end of the aggregate drum and heated to a desired temperature while rolling and flowing down the aggregate drum.

In addition, while hot air is sent from a waste material burner into the waste material drum that rotates together with the aggregate drum,
The waste material is supplied from the waste material burner side, heated while rolling down inside the waste material drum, and the heated waste material is dropped from the discharge passage at the end of the waste material drum into the annular passage provided around the outer periphery of the aggregate drum, and is then passed through the lower part of the annular passage. Discharge from the discharge chute. The hot air that has passed through the waste material drum is led out from the discharge passage to the exhaust flue via the annular passage, where it joins with the hot air taken out from the aggregate drum and flows downstream.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

1 is an aggregate drum for heating new aggregate;
A cylindrical drum having a large number of raking blades 2 arranged around its inner periphery is tilted and rotatably supported by support rollers 3, and is rotated at a predetermined speed by a drive device (not shown). Reference numeral 4 denotes an aggregate burner, which sends hot air into the aggregate drum 1, while conveying new aggregate from an aggregate hopper 5 that stores new aggregate according to various particle sizes via a conveyor 6. The new aggregate is fed from the other end of the drum 1 and scraped up by the blade 2.
The new aggregate is heated to a desired temperature while being raked up and rolled down, and is discharged from the discharge section 7. The combustion amount of the burner 4 is controlled by detecting the temperature of the new aggregate heated by a temperature sensor 8 disposed in the discharge part 7, and controlling the combustion amount so that the aggregate temperature is set in advance. .

Reference numeral 9 denotes a waste material drum for heating waste material, in which a cylindrical drum having a large number of scraping blades 10 arranged around its inner periphery is inserted and fixed into the aggregate drum 1, and rotates together with the aggregate drum 1. I'm starting to do that. 1
1 is a waste material burner which forms a flame in the combustion chamber 12 and sends hot air into the waste material drum 9;
The waste material is supplied into the waste material drum 9 by the waste material hopper 13 via the conveyor 14, and heated to a desired temperature while rolling and flowing down while being scraped up by the scraping blades 10. A discharge passage 15 is provided at the tip of the waste material drum 9 in a direction perpendicular to the drum axis.
The discharge passage 15 penetrates the wall of the aggregate drum 1 and opens into an annular passage 16 provided around the outer periphery of the aggregate drum 1. An exhaust flue 1 is provided in the upper part of the annular passage 16.
7 and a discharge chute 18 at the bottom of the annular passage 16.
are arranged. The exhaust flue 17 is connected to the exhaust flue 19 of the aggregate drum 1, and the exhaust flue 17 is connected to the exhaust flue 19 of the aggregate drum 1.
The gas flow passed through the exhaust passage 15 and the annular passage 1.
6 and an exhaust flue 17, the gas flows through the aggregate drum 1, and are discharged into the atmosphere from a chimney via a downstream dust collector 20 and an exhaust fan (not shown). 21 and 22 are dampers for adjusting the air volume of both drums. Reference numeral 23 denotes a screw feeder disposed between the discharge section 7 and the discharge chute 18, and by closing the on-off valve 24 disposed at the lower part of the discharge chute 18 and driving the screw feeder 23. The material discharged from the waste drum 9 can be mixed with the new aggregate discharged from the aggregate drum 1. Reference numeral 25 denotes a temperature sensor for the material discharged from the waste material drum 9 when the on-off valve 24 is opened, and the temperature sensor 25 provides feedback to control the combustion amount of the waste material burner 11.

Therefore, when heating and drying new aggregate and waste material at the same time, the on-off valve 24 is opened, the aggregate burner 4 and the waste material burner 11 are burned, and the aggregate drum 1
New aggregate is supplied to the waste material drum 9, and waste material is supplied to the waste material drum 9, heated and dried while rolling down each drum, and the temperature sensor 8 detects the temperature of the new aggregate discharged from the discharge section 7. The temperature of the waste material discharged from the discharge chute 18 is detected by a temperature sensor 25 and fed back to the combustion amount control of the aggregate burner 4 and the waste material burner 11, thereby controlling each aggregate to a predetermined temperature. . The heated new aggregate is transported to the plant main body, sieved into various particle sizes and stored in storage bins, and the heated waste material is also transported to the plant main body and stored in the waste material storage bins. Note that when the on-off valve 24 is closed,
The screw feeder 23 can also be driven to mix the waste material into the new aggregate.

When only new aggregate is heated and dried, open/close valve 2
4 and drive the screw feeder 23,
In the same manner as described above, the aggregate burner 4 and the waste material burner 11 are burned to supply new aggregate to the aggregate drum 1 and also to the waste material drum 9. The new aggregate discharged from the waste material drum 9 is combined with the new aggregate discharged from the aggregate drum 1 by the screw feeder 23, and is conveyed to the plant main body. Waste material burner 1 in this case
The combustion amount control No. 1 is controlled by the aggregate temperature detected by the temperature sensor 8.

When only waste material is heated and dried, use aggregate drum 1.
Close the damper 21 disposed in the exhaust flue 19 of
The on-off valve 24 is opened, only the waste material burner 11 is combusted, and the waste material is supplied to the waste material drum 9 and heated and dried.

[Effects of the Invention] As described above, the apparatus of the present invention can heat and dry both new aggregate and waste material, and uses a countercurrent heating method with high thermal efficiency to heat the new aggregate. The waste material is heated using a parallel current heating method that does not overheat the waste material, making it possible to efficiently heat and dry both new aggregate and waste material.

[Brief explanation of drawings]

FIG. 1 is a schematic partial cross-sectional view of the apparatus of the present invention, and FIG. 2 is an enlarged vertical cross-sectional view taken along the line A--A in FIG. DESCRIPTION OF SYMBOLS 1... Aggregate drum, 4... Aggregate burner, 5... Aggregate hopper, 7... Discharge part, 9... Waste material drum, 11... Waste material burner, 13... Waste material hopper, 15... Discharge passage, 1
6... Annular passage, 17, 19... Exhaust flue, 18... Exhaust chute, 20... Dust collector, 21, 22... Damper for adjusting air volume, 23... Screw feeder, 2
4...Opening/closing valve.

Claims (1)

[Claims] 1. A burner is installed at one end of an aggregate drum that is rotatably supported at an angle, and a conveyor for supplying new bones is installed at the other end, and a waste drum is inserted from the conveyor side of the aggregate drum to supply aggregate. In addition to being fixed to the drum, a burner and a conveyor for supplying waste materials are provided at one end of the waste material drum, and a discharge passage is provided at the other end in a direction perpendicular to the drum axis. The wall of the aggregate drum is penetrated to open to an annular passage provided around the outer periphery of the aggregate drum, and an exhaust flue connected to the exhaust flue of the aggregate drum is provided at the upper part of the annular passage, and an exhaust flue is provided at the lower part of the annular passage. An asphalt mixture manufacturing device characterized by being equipped with a discharge chute.