JPH03100206A - Asphalt compound manufacturing method and device therefor - Google Patents

Abstract

PURPOSE:To attempt to effectively utilize a waste material dryer in low availability by arranging a branch chute in the midst of an exhaust chute, providing a waste material storing bin thereunder, and providing a passage changing damper for changing passage of passing material to the branch part. CONSTITUTION:A waste material dryer 20 is established in parallel to an asphalt plant having a new material dryer 1, a branch chute 29 in the midst of an exhaust chute 28, and a waste material storing bin 31 downward the branch chute 29 are respectively arranged. When only new material is heated, a passage changing damper 30 of the exhaust chute 28 is moved, new material is fed into a new material/waste material dryer 1, 2, heated new material is thrown into a vibration sieve 13 via elevators 10, 27, and stored in a new material storing bin 14 for every grain diameter. Moreover, when waste material is heated, the passage changing damper 30 is moved, waste material is fed into the waste material dryer 20, dropped to the branch chute 29 side via the elevator 27, and stored in the waste material storing bin 31.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method and apparatus for manufacturing asphalt mixture, which is a road paving material.

[Prior Art] Asphalt pavement waste materials (hereinafter referred to as "waste materials") dug up during road construction, etc. are being heated and regenerated, and are being reused by mixing a predetermined amount into new asphalt mixture. A dryer for waste materials that heats and recycles this waste material is often installed separately from a dryer for new materials that heats new aggregate (hereinafter referred to as "new material").

[Problem to be solved by the invention] However, the amount of recycled waste material is small compared to the production amount of new asphalt mixture, and even though the dryer for new material is operating at full capacity, the dryer for waste material is idle. The problem was that the situation often persisted, and the economic effects could not be expected to be that great considering the large amount of equipment costs invested.

Therefore, in view of the above points, the present invention aims to make effective use of a waste material dryer with a low operating rate, and by increasing its operating rate, it is an object of the present invention to propose an economical device with less waste as a whole system. It is something.

[Means for Solving the Problems] In order to achieve the above object, the present invention installs a waste material dryer that can heat both new material and waste material in an asphalt plant having a new material dryer, and The tip of the discharge chute of the vertical conveyance device connected to the material discharge section of the plant faces the inlet of the vibrating sieve at the top of the plant main body, and a branch chute is provided in the middle of the discharge chute, and the waste material is disposed below the branch chute. A waste material storage bin for temporarily storing the material is provided, and a damper for changing the route of the passing material is provided at the branch part of the branch chute.

[Function] According to the present invention, when only new material is heated, the route change damper provided in the branch chute is operated so that the material flows toward the plant main body, and the dryer for new material is heated. New material is supplied to both the waste material dryer and the waste material dryer, and the new material heated and heated by the waste material dryer is lifted to the upper part of the plant body by the vertical conveyance device, and is transported through the discharge chute along with the new material heated by the new material dryer. The material is put into a vibrating sieve in the plant body, sieved by particle size, and stored in new material storage bins.

In addition, when heating waste materials, the damper for changing the route of the branch chute is operated so that the material flows into the waste material storage bin, the waste materials are supplied to the waste material dryer, and the waste materials are heated and heated by the waste material dryer. is lifted by the vertical conveyance device, and the waste material flowing down the discharge chute is dammed by a route change damper and dropped to the branch chute side,
Pour into waste material storage bin and store.

When producing asphalt mixture, new material is removed from the new material storage bin, weighed in a predetermined amount, and put into a mixer together with separately weighed stone powder and asphalt, and mixed for a predetermined time. At this time, if necessary, a predetermined amount of waste material is taken out from the waste material storage bin and put into a mixer, where it is mixed with new material and recycled as an asphalt mixture.

〔Example] Embodiments of the present invention will be described below based on the drawings.

1 is a dryer for new materials that heats new materials, and the dryer for new materials 1 has a large number of raking blades (not shown in the drawing) on the inner circumference.
A cylindrical new material drum 2 with a cylindrical drum around the periphery is tilted and rotatably supported on a machine base 3, and is rotated at a predetermined speed by a drive device (not shown). Hot air is sent into the drum from a burner 5 installed in the hopper 4, while an exhaust flue 7 is connected to a cold hopper 6 at the other end.
A flow of hot gas is maintained through the drum 2 by suctioning the exhaust gas with a terminal exhaust fan (not shown). Then, the material is transferred to the drum 2 by the belt conveyor 8.
The new material is brought into contact with a high-temperature gas stream while flowing down inside the drum 2 while scraping up the new material with a scraping blade.
The temperature is raised to a desired temperature and then discharged from the discharge section 9 disposed in the hot hopper 5.

The new material discharged from the drum 2 is transferred to the packet elevator 10.
The waste is lifted to the top of the plant body 11 by the operator, slides down the discharge chute 12, and is thrown into the vibrating sieve 13.
The raw materials are sieved and stored in new material storage bins 14 according to particle size. Below the new material storage bin 14 in the upper part of the plant body 11, there are a new material measuring tank 15, a stone powder storage bin 16 for storing stone powder, a stone powder measuring tank 17, an asphalt measuring tank 18 for measuring molten asphalt, and a mixer 19. The asphalt mixture can be manufactured by measuring and mixing predetermined amounts of materials.

20 is a dryer for waste materials that can heat both new materials and waste materials. The dryer 20 has almost the same structure as the new material dryer 1, and detailed explanation of its structure will be omitted.

New material or waste material is supplied into the drum from the hot hopper 21 side of the waste material dryer 20 by the belt conveyor 22, while the burner 23 is combusted to form a flame in the combustion chamber 24, and the hot air is sent into the drum to dry new material. The material or waste material is heated to a desired temperature, discharged from the discharge section 26 on the side of the cold hopper 25, and lifted to the upper part of the plant main body 11 by the packet elevator 27, which is a vertical conveyance device.

The discharge chute 28 of the packet elevator 27 faces the inlet of the vibrating sieve 13 on the upper part of the plant main body 11, and a branch chute 29 is disposed in the middle of the discharge chute 28. At the branching part of the branching chute 29, a damper 30 for changing the route which divides the flow of material flowing through the discharge chute 28 into two directions is arranged so as to be rotatable around one end, as shown by the solid line in the figure. When the material is located, the material flows toward the branch chute, and when it is located as shown by the dotted line, the material flows toward the vibrating sieve 13. A waste material storage bin 31 for temporarily storing waste material is provided below the branch chute 29, and a waste material measuring tank 32 is provided below the bin 31.

When only new material is to be heated, the route changing damper 30 of the discharge chute 28 is first operated to the position shown by the dotted line. Then, new material is supplied to the dryer 1 for new material, and also to the dryer 20 for waste material. The new material heated by the waste material dryer 20 is transferred to the plant main body 1 by the packet elevator 27.
1 is lifted up to the upper part of the screen, slides down the discharge chute 28, and is thrown into the vibrating sieve 13. At this time, dryer 1 for new material
The new material heated in is also lifted by the packet elevator lO, slides down the discharge chute 12, and is thrown into the vibration 813. The new material put into the vibrating sieve 13 is sieved and stored in a new material storage bin 14 according to particle size.

In this way, if the waste material dryer 20 also heats the new material, the amount of heat treatment of the new material can be dramatically increased.

Next, when heating the waste material, the damper 30 for changing the route of the branching chute 29 is first operated to the position shown by the solid line. Then, the waste material is supplied to the waste material dryer 20, heated in the drum, and then lifted up to the upper part of the plant main body 11 by the packet elevator 27 and made to flow down the discharge chute 28. The waste material flowing down the discharge chute 28 is stopped from flowing toward the vibrating sieve 13 by the route changing damper 30, and all of it falls to the branching chute 29 side and is stored in the waste material storage bin 31.

Then, a predetermined amount of new material stored in the new material storage bin 13 is weighed and put into the mixer 19, and when waste material is mixed in, a predetermined amount of waste material stored in the waste material storage bin 31 is weighed and put into the mixer 19. The asphalt mixture is then mixed with other materials to produce an asphalt mixture.

[Effects of the Invention] According to the asphalt mixture manufacturing method and apparatus according to the present invention, when the waste material is not recycled, the waste material dryer 20 is used for heating new material, thereby further improving the new material heating ability. can. In addition, since the dryer for waste materials can be used for heating new materials, it is possible to downsize the dryer for new materials, reducing equipment costs.Furthermore, it is economically advantageous because the operating rate of the dryer for waste materials can be improved.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of an asphalt mixture manufacturing apparatus according to the present invention. 1...Dryer for new material 11...Plant main body 1
3... Vibrating sieve 14... New material storage bin 20...
Dryer for waste materials 27...Packet elevator (vertical conveyance device) 28-...Discharge chute 29...Branch chute 30...Damper for route change 31...Waste material storage bin 32...Waste material measuring tank

Claims (2)

[Claims] (1) A waste material dryer capable of heating both new material and waste material is installed in an asphalt plant equipped with a new material dryer, and the discharge chute of the vertical conveyance device connected to the material discharge section of the waste material dryer is installed at the top of the plant main body. A branching chute is provided in the middle of the discharge chute facing the inlet of the vibrating sieve, and a waste material storage bin for temporarily storing waste material is provided below the branching chute, and a branching portion of the branching chute is provided. If a damper for changing the route is installed in the branch chute and only new material is heated, the damper for changing the route installed in the branch chute is operated so that the material flows toward the plant main body, and the damper for changing the route is installed in the dryer for new material. New material is supplied to the waste material dryer, and the new material heated and heated by the waste material dryer is lifted to the upper part of the plant main body by the vertical conveyance device, and is passed through the discharge chute along with the new material heated by the new material dryer. If the waste material is to be fed into a screen, sieved according to particle size, and stored in a new material storage bin, and then heated, the damper for changing the route of the branch chute should be operated so that the material flows into the waste material storage bin. , the waste material is supplied to the waste material dryer, the waste material heated and heated by the waste material dryer is lifted up by the vertical conveyance device, the waste material flowing down the discharge chute is blocked by a route change damper, and is allowed to fall to the branch chute side for waste material storage. A method for manufacturing asphalt mixture, characterized in that it is charged and stored in a bottle. (2) A waste material dryer that can heat both new material and waste material is installed in an asphalt plant that has a dryer for new material, and the tip of the discharge chute of the vertical conveyance device connected to the material discharge part of the waste material dryer is installed in the asphalt plant. A branch chute is provided in the middle of the discharge chute facing the input port of the vibrating sieve at the top of the main body, and a waste material storage bin for temporarily storing waste material is provided below the branch chute. An asphalt mixture manufacturing device characterized in that a route changing damper for changing the route of passing material is disposed at a branching part.