JPS62242001A - Apparatus for producing asphalt compounded material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an apparatus for manufacturing asphalt mixture, which is a road paving material.

(b) Prior art In recent years, asphalt pavement waste material (hereinafter referred to as waste material) dug up during road construction, etc. has come to be recycled by heating, and generally, a predetermined amount of heated waste material is mixed into new asphalt mixture. There are many methods of reproduction.

Therefore, recycling plants that heat and recycle waste materials are installed alongside asphalt plants that produce new asphalt mixtures. This recycling plant consists of a system that is almost the same as the asphalt heating system, and includes a waste material dryer that heats the waste material, a cyclone collector that is the primary dust collector that captures the dust scattered from the dryer, and a secondary dust collector. It consists of a wet type dust collector.

The problem when heating waste wood is that when the asphalt contained in the waste wood is heated, oil smoke, which is a volatile component, is generated in the exhaust gas, and when this oil smoke is released from the chimney along with the exhaust gas, the smoke becomes yellow. When the water vapor disappears on a clear day, it becomes pale and billowing smoke, which is called blue smoke, and it causes a foul odor in the vicinity and is a pollution problem that cannot be ignored. In order to suppress the amount of oil smoke generated, it is important not to overheat the waste material more than necessary, and various measures have been taken for waste material dryers in this regard.

(c) Problems that the invention aims to solve As mentioned above, waste material dryers have been devised to minimize the amount of oil smoke generated, but as long as the waste material is heated, the generation of oil smoke cannot be completely eliminated. do not have.

In addition, the dust collector that captures the dust scattered from the waste material dryer of the Recycle Rant cannot use a bag filter that uses filter cloth due to the stickiness of the oil smoke contained in the exhaust gas, so a wet type dust collector is used as a secondary dust collector. However, asphalt plants are also equipped with cyclone dust collectors as secondary dust collectors and bag filters as secondary dust collectors.

Thus, it is uneconomical to have independent dust collectors in both plants.

In view of the above points, the present invention aims to remove as much as possible the oil smoke contained in the exhaust gas of a recycling plant, and to integrate the dust collectors of the recycling plant and the asphalt plant.

(d) Means for Solving the Problems The present invention connects the exhaust flue 7 of the waste material dryer 1 of a recycling plant to the burner 10 side of the aggregate dryer 9 of an asphalt plant, so that the exhaust gas led out from the waste material dryer 1 is fed into the aggregate dryer 9 and passed through the aggregate dryer 9, and an exhaust flue 13 downstream of the aggregate dryer 9 is provided with a dust collector for capturing dust.

(E) Function When manufacturing asphalt mixture, aggregate is supplied to the aggregate dryer 9, and waste material is supplied to the waste material dryer 1. At this time, in the waste material dryer 1, the waste material containing asphalt is heated, thereby producing oil smoke, which is a volatile matter, in the exhaust gas.

This exhaust gas passes through the exhaust flue 7 and is introduced into the burner 10 side of the aggregate dryer 9, and a part of the oil smoke in the exhaust gas is combusted by the flame of the burner 10.

While the oil smoke that could not be combusted is guided downstream, it collides with the aggregate flowing down in the aggregate dryer 9, and a part of it adheres to the aggregate due to the stickiness of the oil smoke. Further, the oil smoke that could not adhere to the aggregate collides with the dust flying up inside the aggregate dryer 9, and the surface is coated and becomes non-adhesive dust. This non-adhesive dust passes through without adhering to the inner surface of the downstream exhaust flue 13, and the coarse part of the dust is captured by the cyclone dust collector, which is the secondary dust collector, and the fine part of the dust is captured by the bag filter, which is the secondary dust collector. It will be done.

(f) Example 1 is a recycling plan that heats waste materials) (7) This is a waste material dryer, which is a rotary kiln type, rotating a cylindrical drum with a large number of scraping blades 2 arranged around the inner periphery. It is freely tilted and pivoted, and is rotated at a predetermined speed by a drive device (not shown). 3 is a burner, and a combustion chamber 4
A flame is formed inside the waste material dryer l to send high-temperature gas into the waste material dryer 1, while the waste material is introduced via the conveyor 5, and the waste material is heated to a desired temperature while being transferred and flowed down by the scraping blades 2. , is discharged from the discharge section 6.

Reference numeral 7 denotes an exhaust flue connected to the waste material dryer 1, and the exhaust flue 7 is provided with a fan 8 for sucking exhaust gas. The exhaust flue 7 is branched and one side is connected to the combustion chamber 4 of the waste material dryer 1, and a part of the exhaust gas is circulated to the combustion chamber 4 of the waste material dryer 1 and mixed with the combustion gas.
The temperature of the hot air supplied inside is lowered to prevent the waste material from overheating. The other side of the one-branched flue 7 is connected to the hot hopper 11 on the burner 10 side of the aggregate dryer 9 of the known Asalto Plant, and the flame of the burner IO is brought into contact with the exhaust gas, so that the oil smoke in the exhaust gas is removed. I am trying to burn some parts. While the oil smoke that could not be combusted passes through the aggregate dryer 9 together with the combustion gas, it collides with the aggregates supplied via the conveyor 12 disposed at the other end of the aggregate dryer 9, and the adhesiveness of the oil smoke is removed. Depending on the nature, it adheres to the aggregate and decreases. Further, the oil smoke that has not been able to adhere to the aggregate collides with the dust thrown up by the gas flow, and its surface is coated with dust and becomes non-adhesive, and is led out from the aggregate dryer 9. The oil smoke that has become non-adhesive passes through the downstream flue 13 without adhering to it, and the cyclone dust collector 14 removes coarse particles of dust from the exhaust gas into the bag filter 15.
The fine particulate matter of the dust is captured and the purified gas is released into the atmosphere from the chimney 16.

As described above, in the present invention, the exhaust gas discharged from the waste material dryer 1 of the recycling plant is introduced into the aggregate dryer 9 of the asphalt plant, but when both plants are operated at the same time, normally the aggregate dryer 9 of the asphalt plant is Since the capacity is lowered by reducing the amount of aggregate supplied to the asphalt plant, there is a margin in the amount of exhaust gas to be sucked in, and there is no problem in introducing the exhaust gas from the recycling plant into the aggregate dryer 9. The dust collection system can be used as is.

(e) Effect The present invention connects the exhaust flue 7 of the waste material dryer 1 of a recycling plant to the burner 10 side of the aggregate dryer 9 of an asphalt plant, and introduces the exhaust gas of the waste material dryer 1 into the aggregate dryer 9. Therefore, the oil smoke generated by heating the waste material in the waste material dryer 1 is sent to the aggregate dryer 9 together with the exhaust gas, where it can be partially combusted by the flame of the burner 10, and the oil smoke that could not be combusted is removed from the aggregate. It collides with the aggregate in the dryer 9 and adheres to the aggregate due to the stickiness of the oil smoke, so it can be reduced. Furthermore, the oil smoke that could not adhere to the aggregate collides with the dust flying up inside the aggregate dryer 9 and becomes coated and becomes non-adhesive, so that it does not adhere to downstream equipment such as the flue 13. Even a bag filter 15, which could not be used conventionally due to the stickiness of oil smoke, can now trap the oil smoke, and the dust collector of an asphalt plant can be used as it is, so it has great economical benefits.

[Brief explanation of drawings]

FIG. 1 is a partially vertical schematic diagram of an embodiment of the device of the present invention. 1... Waste material dryer 7... Exhaust flue 9... Aggregate dryer 10... Burner 11... Hot hopper 13... Exhaust flue 14... Cyclone dust collector 15... Bag filter -

Claims (1)

[Claims] Connect the exhaust flue of the recycling plant's waste material dryer to the burner side of the asphalt plant's aggregate dryer,
An asphalt compound characterized in that exhaust gas derived from a waste material dryer is sent to an aggregate dryer and passed through the aggregate dryer, and a dust collector for capturing dust is disposed in an exhaust flue downstream of the aggregate dryer. Material manufacturing equipment.