JPH0415775Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for producing an asphalt mixture that is a road paving material, and particularly relates to an apparatus that can also heat and regenerate asphalt pavement waste material.

[Prior art] Asphalt pavement waste material (hereinafter referred to as "waste material") excavated by road construction etc. has been heated and recycled and used as asphalt composite material. Recycling plants are rarely installed independently on factory grounds, and are usually installed alongside asphalt plants that produce 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, it is desirable to have a device that can heat both new aggregate and waste materials with a single dryer.

[Means for Solving the Problems] In view of the above-mentioned points, the present invention has been proposed in order to solve the above-mentioned problems by disposing a burner at one end of the aggregate drum which is rotatably supported at an angle, while at the other end. An exhaust flue and a conveyor for supplying new aggregate are installed at the end, and a waste drum is inserted from the conveyor side of the aggregate drum and fixed to the aggregate drum, and a drum is attached to the tip of the waste drum. A discharge passage is arranged in a direction perpendicular to the axis, and the discharge passage penetrates the wall of the aggregate drum and opens to an annular exhaust passage provided around the outer periphery of the aggregate drum. An exhaust flue is provided to connect with the exhaust flue of the aggregate drum, an exhaust chute is provided at the bottom of the exhaust annular passage, and through holes are bored at appropriate intervals along the peripheral wall of the aggregate drum. The through hole is surrounded by a cover body having an opening on the burner side from the inside, and a return annular passage is surrounded from the outer periphery, and a blower is interposed between the return annular passage and the waste material drum. The present invention provides an asphalt mixture production apparatus characterized in that the asphalt mixture is connected by a flue connected to the waste material drum, and a waste material conveyor for supplying waste material is disposed on the flue connection side of the waste material drum.

[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 the aggregate burner disposed at one end. 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, a part of the hot air passing through the aggregate drum is sucked in by an exhaust fan from the return annular passage and sent into the waste drum, which rotates together with the aggregate drum. The waste material is supplied and heated while rolling down inside the waste material drum.
The heated waste material is dropped from the discharge passage of the waste material drum into the discharge annular passage provided around the outer periphery of the aggregate drum, and is discharged from the discharge chute at the bottom of the discharge annular passage. The exhaust gas that has passed through the waste material drum is led out to the exhaust flue through the exhaust annular passage at the end of the waste material drum, where it joins with the exhaust gas led out from the aggregate drum and flows downstream.

[Example] Embodiments of the present invention will be described below with reference to 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). 4 is an aggregate burner, which sends hot air into the aggregate drum 1. New aggregate is transferred from an aggregate hopper 5, which stores new aggregate according to various particle sizes, to the aggregate drum via a conveyor 6. The new aggregate is fed from the other end of the aggregate drum 1, and is heated to a desired temperature while being rolled down in the aggregate drum 1 while being scraped up by the scraping blades 2, and then 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 through holes drilled at appropriate intervals along the peripheral wall of the aggregate drum 1. From the inside of the aggregate drum 1, the aggregate drum is surrounded by a cover body 10 having an opening on the burner 4 side. The new aggregate rolling down in the aggregate drum 1 is prevented from flowing out from the through hole 9, and a return annular passage 11 surrounding the through hole 9 is provided on the outer periphery of the aggregate drum 1. Reference numeral 12 is a waste material drum for heating waste material, and a cylindrical drum having a number of scraping blades 13 arranged around the inner circumference is inserted and fixed into the aggregate drum 1, and rotates together with the aggregate drum 1. I'm starting to do that. Reference numeral 14 designates a part of the hot air passing through the aggregate drum 1 to be transferred from the return annular passage 11 to the waste material drum 12.
A part of the hot air is sucked through a through hole 9 formed in the peripheral wall of the rotating drum 1 by an exhaust fan 15 installed in the flue 14, and is provided as necessary. Hot air is sent into the waste material drum 12 while capturing the scattered dust with the dust collector 16, while the waste material is supplied into the waste material drum 12 from the waste material hopper 17 via the waste material conveyor 18, and is rolled while being raked up with the raking blades 13. It is heated to the desired temperature while flowing down. A discharge passage 19 is provided at the tip of the waste drum 12 in a direction perpendicular to the drum axis, and the discharge passage 19 penetrates the wall of the aggregate drum 1 and extends around the outer periphery of the aggregate drum 1. An exhaust flue 21 is provided at the upper part of the exhaust annular passage 20, and an exhaust chute 22 is provided at the lower part of the exhaust annular passage 20. The exhaust flue 21 is connected to the exhaust flue 23 of the aggregate drum 1, and the gas flow passing through the waste drum 12 passes through the exhaust passage 19, the annular exhaust passage 20 and the exhaust flue 21 to the aggregate drum. The gas flow that has passed through 1 is merged with the downstream dust collector 24 and exhaust fan (not shown).
It is then released into the atmosphere from chimneys. 25,2
6 and 27 are dampers for adjusting the air volume of both drums. Reference numeral 28 denotes a screw feeder disposed between the discharge section 7 and the discharge chute 22. By closing the on-off valve 29 disposed at the lower part of the discharge chute 22 and driving the screw feeder 28, the waste material is removed. The material discharged from the drum 12 can be mixed with the new aggregate discharged from the aggregate drum 1. 30 is the waste material drum 12 when the on-off valve 29 is opened.
It is a temperature sensor for the material discharged from the waste material drum 12, and feeds back to the opening amount control of the air volume adjustment damper 25, which adjusts the amount of hot air sent to the waste material drum 12.

In the case of heating and drying new aggregate and waste material at the same time, the on-off valve 29 is opened, the aggregate burner 4 is combusted, and high-temperature gas is sent to the aggregate drum 1, while being exhausted from the return annular passage 11. Hot air sucked through the air blower 15 is sent to the waste material drum 12, new aggregate is fed to the aggregate drum 1, and new aggregate is transferred to the waste material drum 1.
2 is supplied with waste material, 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, and the temperature of the waste material discharged from the discharge chute 22 is detected. The temperature of each aggregate is controlled to a predetermined temperature by detecting the temperature with a temperature sensor 30 and providing feedback to the combustion amount control of the aggregate burner 4 and the opening amount control of the opening/closing damper 25. 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 it is also possible to close the on-off valve 29 and drive the screw feeder 28 to mix the waste material into the new aggregate.

[Effects of the device] As described above, the device of the present invention can heat and dry both new aggregate and waste material, and uses a countercurrent method with high thermal efficiency to heat the new aggregate. For heating, we adopted a parallel current heating method that does not overheat the waste material, so both new aggregate and waste material can be efficiently heated and dried.

[Brief explanation of the drawing]

FIG. 1 is a schematic partial cross-sectional view of the device 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... Burner, 5... Aggregate hopper, 7... Discharge part, 9... Through hole, 10... Cover body, 11... Return annular passage, 12...
Waste drum, 14... flue, 15... exhaust fan, 1
7...Waste material hopper, 19...Discharge passage, 20...
Exhaust annular passage, 21...exhaust flue, 22...exhaust chute, 23...exhaust flue, 25, 26, 2
7...Damper for adjusting air volume, 28...Screw feeder, 29...Opening/closing valve.

Claims (1)

[Scope of utility model registration request] A burner is disposed at one end of the aggregate drum which is rotatably supported at an angle, while an exhaust flue and a conveyor for supplying new aggregate are disposed at the other end. A waste material drum is inserted and fixed to the aggregate drum, and a discharge passage is arranged at the tip of the waste material drum in a direction perpendicular to the drum axis, and the discharge passage penetrates the wall of the aggregate drum to remove the aggregate. The exhaust flue is open to an annular exhaust passage provided around the outer periphery of the drum, an exhaust flue is provided at the upper part of the exhaust annular passage to connect with the exhaust flue of the aggregate drum, and an exhaust chute is provided at the lower part of the exhaust annular passage. In addition to arranging
Through-holes are bored at appropriate intervals along the peripheral wall of the aggregate drum, and the through-holes are surrounded by a cover body having an opening on the burner side from the inside, and surrounded by a return annular passage from the outer periphery. The asphalt is characterized in that the return annular passage and the waste material drum are connected by a flue with an exhaust fan interposed therebetween, and a waste material conveyor for supplying waste material is disposed on the flue connection side of the waste material drum. Composite material manufacturing equipment.