JPH0830322B2 - Asphalt mixture manufacturing method and manufacturing apparatus - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method and an apparatus for producing an asphalt mixture which is a road paving material.

[Prior Art] An asphalt plant that manufactures asphalt mixture has a burner that sends hot air to a dryer that is an aggregate heating device, and a device that becomes a high sound source such as an exhaust machine that sucks and exhausts exhaust gas that has passed through the dryer. Therefore, the installation location is restricted to an area similar to the industrial area.

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

The present invention has been made in view of the above points, and an object thereof is to provide a manufacturing method and a manufacturing apparatus of an asphalt mixture, which enables the asphalt mixture to be manufactured and shipped even in the vicinity of an urban area.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a vibrating screen that sifts the aggregate heated and dried by a dryer according to the particle size and a particle size below the vibrating screen. It consists of a storage bottle for storing aggregates by particle size, an aggregate measuring tank arranged below the storage bottle, a measuring tank for measuring stone powder and asphalt, and a mixer arranged below the measuring tank. A surge bin for temporarily storing aggregate heated by a dryer without passing through the vibrating sieve is arranged on the side of the plant body, and a mixer dedicated to mixing heated aggregate discharged from the surge bin is arranged below the surge bin. The asphalt plant is used as a heating aggregate supplying plant, and the vibrating sieve is further separated from the heating aggregate supplying plant to screen the aggregate according to the particle size, and the heating aggregate sieved according to the particle size under the vibrating screen is particle size. A storage bin to be stored separately and the storage bin The aggregate measuring tank arranged under the storage bin, the measuring tank for measuring stone powder and asphalt, and the mixing material manufacturing plant consisting of a mixer arranged under the measuring tank are installed. is there.

[Operation] According to the present invention, the asphalt plant is installed in a place where it cannot be installed due to noise regulations, and a burner manufacturing plant excluding a heating and drying system such as a burner and an exhaust fan, which are noise sources, is installed, It is intended to reinforce the heated aggregate from the plant. If you plan to ship asphalt mix at the mix production plant, first supply the desired aggregate to the dryer of the asphalt plant, which is the heating aggregate supply plant, and heat dry it. It is transported to the upper part and put into a surge bin on the side of the plant body for temporary storage without passing through a vibrating screen. If there is a request for shipment, a predetermined amount of heated aggregate is discharged from the surge bin and put into a mixer exclusively for shipment to a lower-level compound material manufacturing plant, and an appropriate amount of molten asphalt is added to prevent dust scattering, and then compound material is manufactured. Ship to plant. In addition, if there is a request to ship the asphalt mixture during shipping to the compound manufacturing plant, it will be shipped from the plant body as usual. Then, in the composite material manufacturing plant, the heated aggregate is conveyed to the upper part of the plant, put into a vibrating sieve, sieved according to particle size, and stored in a lower storage bin. Then, when there is a request for shipment of asphalt mixture from the enforcement site, a predetermined amount of heated aggregate is weighed from the storage bottle based on the composition composition requested for shipment, and put into a mixer together with separately measured stone powder and molten asphalt. Adjust the mix,
A given asphalt mix is manufactured.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes an asphalt plant, which is a heating and supplying plant for aggregates, including a dryer 2 for heating and drying the aggregates, a dust collector (not shown) for capturing dust scattered from the dryers 2, and storing and measuring the heated aggregates. , A plant main body 3 for mixing, and other auxiliary equipment. The dryer 2 rotatably tilts and supports a cylindrical drum having a large number of scraping blades around its inner circumference, and cools cold aggregates supplied from an aggregate hopper 4 through a belt conveyor 5 to the scraping blades. Scrape up with, and while rolling down in the drum while dropping it like a curtain, the aggregate is brought into contact with the hot air sent from the burner 6 to heat up the aggregate to a desired temperature, and then to the plant body 3 via the hot elevator 7. We are supplying. The plant body 3 is a storage bin 10 equipped with a vibrating screen 9 for sieving the heated aggregate supplied from the guide chute 8 of the hot elevator 7 according to particle size, a stone powder storage bin 12 for storing stone powder supplied from the stone powder elevator 11, It is composed of an aggregate measuring tank 13, a stone powder measuring tank 14, an asphalt measuring tank 15, a mixer 16 and the like arranged below them. In addition, a branch chute 17 is provided in the middle of the guide chute 8 above the hot elevator 7.
The lower end of the branch chute 17 is connected to a surge bin 18 having a heating and heat retaining structure arranged on the side of the plant body 3. By operating the switching damper 19 provided at the branch portion of the guide chute 8, the heated aggregate flowing in the guide chute 8 is caused to flow toward the vibrating screen 9 side or the surge bin 18 side. Below the surge bin 18, an aggregate measuring tank for measuring the heated aggregate discharged from the surge bin 18
Twenty are arranged. And a mixer 21 dedicated to shipment of the composite material manufacturing plant is arranged below the aggregate measuring tank 20,
Further, an asphalt measuring tank 22 is arranged above the mixer 21 so that a desired amount of molten asphalt can be added toward the mixer 21.

Reference numeral 23 is a mix manufacturing plant installed at a place distant from the asphalt plant 1 which is a heating aggregate supplying plant, and temporarily stores the heated aggregate transported by being heated by the asphalt plant 1 and The asphalt mixture is manufactured by adjusting the mixing and mixing when necessary. Reference numeral 24 is a large-capacity storage bottle that stores the heated aggregate according to the particle size, and has a structure in which the inside is partitioned and several kinds of materials can be heated and kept warm. A vertical transfer device 25 is provided above the storage bin 24.
A vibrating screen 26 for sieving the heated aggregate conveyed by means of particle size is arranged. The vibrating screen 26 sifts the heated aggregate and stores it in a storage bin 24 according to particle size. An aggregate measuring tank 27 is disposed below the storage bin 24, and at the same time the heated aggregate measured in a predetermined amount by the aggregate measuring tank 27 is charged into the lower mixer 28,
A predetermined amount of stone powder is discharged from the stone powder storage bin 30 that stores the stone powder conveyed by the right powder elevator 29, and the stone powder measuring tank 31
Is measured and charged into the mixer 28, and molten asphalt is measured in the asphalt measuring tank 32 and added to and mixed with the aggregate in the mixer 28 to produce an asphalt mixture.

Next, a method of manufacturing the asphalt mixture in the mixture manufacturing plant 23 will be described. First, it is necessary to manufacture the heated aggregate for the composite material manufacturing plant 23 in the asphalt plant 3 of the heated aggregate supplying plant. in this case,
The desired aggregate is cut out from the aggregate hopper 4 which stores the aggregate according to the particle size, and is supplied to the dryer 2 to be heated and dried. It may be cut out, or may be cut out from only one aggregate hopper 4. Then, the aggregate heated and dried by the dryer 2 is conveyed to the upper part of the plant body 3 by the hot elevator 7. At this time, the switching damper 19 provided in the middle of the guide chute 8 of the hot elevator 7 is operated to allow the heated aggregate to flow to the surge bin 18 side. As a result, the heated aggregate conveyed by the hot elevator 7 flows through the guide chute 8 and is guided to the branch chute 17 to be thrown into the surge bin 18. The heated aggregate stored in the surge bin 17 is weighed in a predetermined amount in an aggregate measuring tank 20 in accordance with a shipment request from the composite material manufacturing plant 23 and discharged to a lower mixer 21, and an appropriate amount in an asphalt measuring tank 22. The molten assalt of the above is weighed and added to the mixer 21, and the dust is not scattered from the heated aggregate.
Transport to 23. It should be noted that the addition of molten asphalt is for preventing dust scattering, and is not limited to molten asphalt at all, and if there is a material that prevents dust scattering and does not adversely affect the product, it may be used. .

If there is a request for shipment of asphalt mixture during shipment to this composite material manufacturing plant 23, a predetermined heating aggregate is dispensed from the storage bin 10 based on the composition composition requested for shipment as in the conventional case, and the aggregate measuring tank 13 Measure a predetermined amount with, and put it into the mixer 16 and measure a predetermined amount of stone powder in the stone powder measuring tank 14, and also measure a predetermined amount of molten asphalt in the asphalt measuring tank 15 and add it into the mixer 16. Mix and adjust before shipping. In this way, in the asphalt plant 1 of the heating aggregate supplying plant, the asphalt mixture can be shipped by itself while the heated aggregate is shipped to the mixture manufacturing plant 23.

The heated aggregate transported to the composite material manufacturing plant 23 is transported to the upper part of the plant by the vertical transport device 25 and supplied to the vibrating screen 26. The heated aggregate sieved by the vibrating sieve 26 is stored in the storage bin 24 according to the particle size. Then, one batch of the heated aggregate is dispensed from the storage bin 24 and weighed in the aggregate measuring tank 27 based on the composition according to the shipping request, for example, the composition of aggregate such as dense particle size, coarse particle size, and modified topeca. At the same time as the mixing into the mixer 28, the stone powder measured in the stone powder measuring tank 31 and the molten asphalt measured in the asphalt measuring tank 32 are charged into the mixer 28 and mixed and adjusted to produce a desired asphalt mixture.

If the storage amount of the storage bin 24 decreases due to shipping, a desired amount of heated aggregate is discharged from the surge bin 18 on the asphalt plant 3 side and supplied to the composite material manufacturing plant 23. At this time, when the storage amount of the surge bin 18 is small, the heated aggregate to be replenished is not stored in the surge bin 18, or when the aggregate mixture ratio in the surge bin 18 does not correspond to the shipping requirement. Asphalt plant 3
Performing shipping operations flexibly such as discharging desired heating aggregates from the storage bin 10.

In addition, although an example in which one surge bin 18 is installed is shown in the embodiment, it is not limited to any single surge bin 18 and a plurality of surge bins may be installed to further increase the storage capacity, and the heated aggregate is stored according to the particle size. It may be done. Further, when the method of frequently storing the heated aggregate in the surge bin 18 according to the particle size is adopted, a structure is added so that it can be directly charged into the storage bin 24 without passing through the vibrating screen 26 of the composite material manufacturing plant 23. You may stay.

[Effects of the Invention] As described above, according to the present invention, a composite material manufacturing plant with less noise sources, which excludes a heating and drying system such as a burner and an exhaust fan, which are noise sources, is installed, and heating is performed in the composite material manufacturing plant. Since it is intended to reinforce the heated aggregate from the asphalt plant, which will be the aggregate supply plant, a composite material manufacturing plant with a small number of noise sources can be installed in the suburbs of urban areas without any problems due to noise pollution. Of.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an asphalt plant and a composite material manufacturing plant showing an embodiment of the present invention. 1 ... Asphalt plant, 2 ... Dryer, 3 ...
Plant body, 9 ... Vibrating screen, 10 ... Storage bottle, 13 ...
Aggregate weighing tank, 14 …… Stone powder weighing tank, 15 …… Asphalt weighing tank, 16 …… Mixer, 18 …… Surge bin, 20 …… Aggregate weighing tank, 21 …… Composite manufacturing plant, 22 …… Storage bottle ,twenty one…
… Mixer, 26 …… Vibration sieve, 27 …… Aggregate measuring tank, 28 …… Mixer, 30 …… Stone powder measuring tank, 32 …… Asphalt measuring tank

Claims (2)

[Claims] 1. An aggregate supplied to a dryer of an asphalt plant, which is a heating aggregate supply plant, and dried by heating is temporarily stored in a surge bin disposed on a side of a plant body, and the heated aggregate stored in the surge bin is desired. After taking out the amount, putting it in a mixer arranged separately from the plant body under the surge bin and mixing it, the heated aggregate is transported to a mixture manufacturing plant installed separately from the heated aggregate supply plant, and mixed. In the production plant, the particles are sieved according to particle size and stored in a storage bin, and when the asphalt mixture is required, a predetermined amount of the heated aggregate is measured from the storage bin based on the desired composition, and the mixture is placed in a mixer arranged below. A method for producing an asphalt mixture, which comprises producing an asphalt mixture by adding molten asphalt while mixing the mixture. 2. A vibrating screen for sieving the aggregate heated and dried by a dryer by particle size, a storage bin for storing the aggregate screened by particle size under the vibrating screen by particle size, and a storage bin of the storage bin. The vibrating sieve is an aggregate measuring tank arranged in a lower order, a measuring tank for measuring stone powder and asphalt, and an aggregate heated by a dryer on the side of the plant body including a mixer etc. arranged in a lower position of the measuring tank. The asphalt plant is equipped with a surge bin for temporary storage without passing through and a mixer dedicated to mixing the heated aggregate discharged from the surge bin below the surge bin is used as the heating aggregate supply plant. A vibrating sieve for sieving aggregate by particle size apart from the plant, a storage bin for storing heated aggregate sieved for each particle size by particle size below the vibrating sieve, and a storage bin disposed under the storage bin Aggregate weighing tank, stone powder and asphalt A measuring tank for measuring the belt, the metering chamber apparatus for manufacturing asphalt mixture, characterized in that installed configuration the mixture material manufacturing plant than provided by the mixer or the like to the lower.