JPH0489904A - Manufacturing of asphalt compound and manufacturing device thereof - Google Patents

Abstract

PURPOSE:To reduce noise pollution by establishing a compound manufacturing plant excluding a heating and drying system, and supplying heated aggregate from a heated aggregate supply plant which is equipped with a heating and drying system and which is established at a separate location. CONSTITUTION:A compound manufacturing plant 11 is established excluding a heating and drying system such as a burner, an exhauster and the like that will be the source of noise. A heated aggregate supply plant 1 equipped with a heating and drying system such as a dryer 2 and the like is established in a location apart from the plant 11 where noise pollution is not a problem. The heated aggregate is issued from a storage silo 3 of the heated aggregate supply plant 1 based on a shipping program, conveyed to the compound manufacturing plant 11 and stored in a storage bin 12. In response to a request for shipment, a required amount of the heated aggregate is picked out from the storage bin 12 after weighing, charged into a mixer 16 together with stone dust and melted asphalt separately weighed, mixed and adjusted.

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.

[Conventional technology] Asphalt plants that manufacture asphalt mixture are
A burner sends hot air to the dryer, which is an aggregate heating device.
In addition, the installation location is restricted to areas similar to industrial areas because it includes equipment that is a source of high noise, such as an exhaust fan that sucks and exhausts the exhaust gas that has passed through the dryer.

[Problems to be Solved by the Present Invention] Therefore, there has been a problem in that it is quite difficult to install an asphalt plant in an area near the city center where noise regulations are strict.

In view of the above-mentioned points, it is an object of the present invention to provide a manufacturing method and a manufacturing apparatus for asphalt mixture, which enable manufacturing and shipping of asphalt mixture even in the suburbs of urban areas.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a dryer for heating and drying aggregates, a storage silo for storing the aggregates heated and dried by the dryer, and a storage silo located below the storage silo. A heated aggregate supply plant consisting of an aggregate measuring tank and a mixer, etc. installed, a vibrating sieve separated from the heated aggregate supply plant to sieve the aggregate to the particle size side, and a vibrating sieve located below the vibrating sieve to the particle size side. A storage bin for storing sieved heated aggregate on the particle size side, an aggregate measuring tank disposed below the storage bin, a measuring tank disposed for weighing stone powder and asphalt, and a measuring tank disposed below the measuring tank. This is a mixed material manufacturing plant consisting of mixers, etc.

[Function] According to the present invention, a mixture manufacturing plant is installed in a place where it is impossible to install an asphalt plant due to noise regulations, and the heating drying system is installed without using a heating drying system such as a burner or an exhaust fan, which is a source of noise. A heated aggregate supply plant having the above-mentioned composite material manufacturing plant is installed in a place where there is no noise pollution problem, and heated aggregate is supplied from the heated aggregate supply plant to the composite material manufacturing plant. be. If the asphalt mixture is scheduled to be shipped at the mixed material manufacturing plant, the heated aggregate is discharged from the storage silo of the heated aggregate supply plant and transported to the mixed material manufacturing plant. In the composite material manufacturing plant, this heated aggregate is transported to the upper part of the plant, placed into a vibrating sieve, sieved into grain sizes, and stored in lower storage bins. Then, when there is a request for shipment of asphalt mix from the construction site, a predetermined amount of heated aggregate is weighed from the storage bin based on the mix composition requested for shipment,
It is put into a mixer together with separately measured stone powder and molten asphalt, mixed and adjusted to produce a predetermined asphalt mixture.

[Example 1 Embodiments of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a heated aggregate supply plant that manufactures and ships heated aggregate, which includes a dryer 2 that heats and dries the aggregate, a dust collector (not shown) that captures dust scattered by the dryer 2,
and a storage silo 3 for storing heated aggregate.

The dryer 2 rotatably supports a cylindrical drum having a large number of scraping blades around its inner periphery, and scrapes up the cold aggregate supplied via an aggregate hopper 4 and a belt conveyor 5. After heating the aggregate to a desired temperature by bringing it into contact with hot air sent from the burner 6 while stirring it up with blades and flowing down the drum while dropping it like a curtain,
It is supplied to the storage silo 3 via a vertical conveyor 7.

The storage silo 3 may have a heating and heat-insulating structure as required, and a plurality of storage silos 3 may be installed to store heated aggregates by type. An aggregate measuring tank 8 and a mixer 9 are installed below the storage silo 3, and a predetermined amount of molten asphalt can be measured and added to the heated aggregate to prevent dust from scattering when the heated aggregate is transported. An asphalt measuring tank 10 is installed in the
A small amount of molten asphalt measured in the asphalt measuring tank 10 is injected into the mixer 9 from an injection nozzle.

11 is a mixed material manufacturing plant installed at a location away from the heated aggregate supply plant 1, and has a configuration that eliminates heating drying systems such as burners and exhaust fans that are a source of noise in asphalt plants. The heated aggregate that is heated and transported in the material supply plant 1 is temporarily stored, and when the asphalt mix is required, it is measured and mixed to produce the desired asphalt mix. It is a large-capacity storage bottle that stores on the particle size side, and has a structure in which the inside is divided to heat and keep several types of materials warm.Storage bottle 12
A vibrating sieve 14 for sieving the heated aggregate conveyed by the vertical conveying device 13 according to particle size is disposed on the top of the , and the heated aggregate is sieved by the vibrating sieve 14 and stored in storage bins 12 according to particle size. to be stored. An aggregate measuring tank 15 is disposed below the storage bin 12, and the heated aggregate measured in a predetermined amount in the aggregate measuring tank 15 is fed into a mixer 16 located below, and at the same time, it is transported by a stone powder elevator 17. A predetermined amount of stone powder is discharged from a stone powder storage bin 18 that stores stone powder, weighed in a stone powder measuring tank 19 and put into the mixer 16, and molten asphalt is measured in an asphalt measuring tank 20 and added to the aggregate in the mixer 16. Asphalt mixture is manufactured by mixing.

Next, a method for manufacturing asphalt mixture in the mixture production plant 11 will be described. First, it is necessary to produce heated aggregate for the composite material manufacturing plant 11 in the heated aggregate supply plant 1. Therefore, the desired aggregate is cut out from the aggregate hopper 4, which stores aggregate according to particle size, and supplied to the dryer 2 where it is heated and dried. Then, if there is a shipping request from the mixed material manufacturing plant 11, the heated aggregate from the storage silo 3 is weighed in a predetermined amount by the aggregate measuring tank 8 and delivered to the lower mixer 9. ,
Loaded onto a waiting truck and moved to composite material manufacturing plant 11
Transport to. If the aggregate is dry during this transportation and dust is scattered, which is unfavorable in terms of pollution, the heated aggregate is put into the mixer 9 and at the same time, a small amount of molten asphalt is measured in the asphalt measuring tank 10. After that, it is preferable to spray the mixture into the mixer 9 and mix it to prevent the dust from scattering.

The heated aggregate that has been transported to the composite material manufacturing plant 11 is transported to the upper part of the plant by a vertical transport device 13 and supplied to a vibrating screen 14 . The heated aggregates sieved by the vibrating sieve 14 are stored in storage bins 12 according to particle size. Then, one batch of heated aggregate is discharged from the storage bin 12 and weighed in the aggregate measuring tank 15 based on the mix composition based on the shipping request, for example, the aggregate mix composition such as dense grain size, coarse grain size, modified topeka, etc. At the same time as stone powder is added to the mixer 16,
The stone powder weighed in step 9 and the molten asphalt weighed in asphalt measuring tank 20 are charged into mixer 16 and mixed and adjusted to produce a desired asphalt mixture.

Further, when the amount stored in the storage bin 12 decreases due to shipping, a desired amount of heated aggregate is discharged from the storage silo 3 of the heated aggregate supply branch 1-1 and supplied to the composite material manufacturing plant 11.

[Effects of the Invention] As described above, according to the present invention, a mixture manufacturing plant is installed that eliminates heating drying systems such as burners and exhaust fans, which are sources of noise in asphalt plants, and also Since heated aggregate is to be supplied from a heated aggregate supply plant that has a heated drying system installed at a distance, if the plant is a plant with few noise sources, such as the above-mentioned composite material manufacturing plant, there will be no noise pollution. It can be installed near urban areas without any problems, and can supply high-quality asphalt mixture even in urban areas.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a heated aggregate supply plant and a composite material manufacturing plant showing one embodiment of the present invention. ■... Heated aggregate supply plant 2... Dryer 3
...Storage silo 8...Aggregate measuring tank 10...Asphalt measuring tank 9...Mixer 11...Mixture manufacturing plant 12...Storage bin 14...Vibrating sieve 1
5... Aggregate measuring tank 16... Mixer 19... Stone powder measuring tank 20... Asphalt measuring tank

Claims (2)

[Claims] (1) The heated aggregate heated and dried by a dryer, which is an aggregate heating device, is temporarily stored in a storage silo, the heated aggregate is appropriately discharged from the storage silo, and the heated aggregate is installed away from the heated aggregate supply plant. transported to a mixed lumber manufacturing plant,
In a mixed material manufacturing plant, the aggregate is sieved according to particle size and stored in storage bins, and when asphalt mix is required, a predetermined amount of heated aggregate is weighed from the storage bin based on the desired composition and transferred to a mixer located below. 1. A method for producing an asphalt mixture, the method comprising producing an asphalt mixture by adding molten asphalt and mixing while adding molten asphalt. (2) A heated aggregate supply plant consisting of a dryer that heats and dries the aggregate, a storage silo that stores the aggregate that has been heated and dried by the dryer, and an aggregate measuring tank and mixer located below the storage silo. , a vibrating sieve separate from the heated aggregate supply plant for sieving the aggregate according to particle size, a storage bin below the vibrating sieve for storing the heated aggregate sieved according to particle size, and the storage An asphalt material manufacturing plant comprising an aggregate measuring tank arranged below a bin, a measuring tank for measuring stone powder and asphalt, and a mixer arranged below the measuring tank. Mixed lumber manufacturing equipment.