JPH0724404Y2 - Asphalt plant mixing tower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a mixing tower installed in an asphalt plant for producing an asphalt mixture which is a road paving material.

[Prior Art] An asphalt plant has an aggregate dryer for heating and drying aggregate, a dust collector for capturing dust derived from the aggregate dryer, and a mixing tower for storing, measuring, and mixing the heated aggregate. It consists of an aggregate storage hopper that stores the asphalt mixture material, a stone dust storage silo, and an asphalt tank, which are installed on the factory premises.

In addition, asphalt waste materials have been reused in recent years, and the number of cases in which a recycling plant, which is this recycling apparatus, is installed together with an asphalt plant is increasing. This recycling plant consists of a recycled material dryer that heats asphalt waste materials (hereinafter referred to as "recycled material"), a dust collector that captures the dust derived from the recycled material dryer, and a recycled material storage silo that temporarily stores heated recycled material. Etc., which are also installed on the same factory site.

Furthermore, an asphalt mixture storage silo for storing the asphalt mixture produced in the above mixing tower for a long time is also installed in the same factory premises.

[Problems to be solved by the invention] As mentioned above, asphalt plants in recent years have increased the number of constituent devices, and on the other hand, land prices in recent years have skyrocketed. It is becoming very difficult to secure a large factory site for installing a factory. Therefore, it is necessary to integrate a plant including many devices as much as possible to save space.

In addition, in urban plants installed near urban areas,
It requires the building to be a pollution-free and building-like structure with an exterior so as not to spoil the scenery of the urban area. For that purpose, it is necessary to integrate each device as much as possible. .

In view of the above points, the present invention provides a mixing tower for an asphalt plant in which space is saved by incorporating a stone powder storage silo and a recycled material storage silo that were conventionally installed on the ground surface of a factory site into the mixing tower. That is the purpose.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention forms a large aggregate storage bin for storing heated aggregate installed in a mixing tower of an asphalt plant according to particle size, A large stone powder storage bin that doubles as a stone powder storage silo and a recycled material storage bin that stores recycled material heated by a recycled material dryer are installed next to the storage bin, and the stone powder that was previously installed on the ground surface of the factory site. Storage silos and recycled material storage silos are integrated into the mixing tower of an asphalt plant.

[Operation] In the mixing tower of the asphalt plant according to the present invention, a large stone powder storage bin, which also functions as a stone powder storage silo, is arranged beside the large aggregate storage bin of the mixing tower and incorporated into the mixing tower. This eliminates the need for a vertical cylindrical stone dust storage silo that was previously installed on the ground surface away from the mixing tower, and also incorporates a recycled material storage bin that stores recycled material heated by a recycled material dryer into the mixing tower. As a result, it is possible to save space by eliminating the need for a silo for storing recycled materials, which was previously installed on the ground surface away from the mixing tower. Furthermore, by integrating it in the mixing tower, it is possible to reduce the number of parts and the number of parts of the equipment related to the stone powder storage silo and the recycled material storage silo installed on the ground surface.
Also, the exterior covering that covers the entire plant can be easily and inexpensively performed.

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

The asphalt plant is an aggregate dryer 1 for heating and drying aggregates, a dust collector 2 for capturing dusts derived from the aggregate dryer 1, a mixing tower 3 for storing, measuring and mixing heated aggregates, and manufacturing. It is composed of an asphalt mixture storage silo 4 for storing the asphalt mixture and other auxiliary equipment.

The aggregate dryer 1 is of a rotary kiln type, in which a cylindrical drum having a large number of scraping blades around its inner periphery is rotatably supported by an inclination and is rotated at a predetermined speed. The aggregate put in the dryer 1 is heated to a predetermined temperature by being brought into contact with the hot air sent from the burner while being rolled up and down in the drum while being scraped by the scraping blades, and passes through the chute 5 at the end of the drum. Is put into the hot elevator 6 and is lifted to above the mixing tower 3 by the hot elevator 6. In addition, the exhaust gas discharged from the aggregate dryer 1 is introduced into the dust collector 2 to capture dust in the gas, passes through the exhaust fan 7, and is discharged from the chimney 8 into the atmosphere. The fine dust captured by the dust collector 2 is stored in the dust storage bin 9.

The recycling plan for heating and recycling the recycled material uses the recycled material dryer 10 for heating the recycled material and the dust collecting device 2 for capturing the dust discharged from the recycled material dryer 10 (also used as the dust collector of the aggregate dryer 1). ), A vertical transfer device 11 for lifting the recycled material heated and recycled by the recycled material dryer 10 above the mixing tower 3, a recycled material storage bin 12 incorporated in the mixing tower 3, and the like.

The recycled material dryer 10 is of a rotary kiln type having substantially the same structure as that of the aggregate dryer 1, and supports a cylindrical drum rotatably inclined around an inner peripheral portion with a large number of scraping blades. It is rotating at a specified speed, and the recycled material put into this recycled material dryer 10 comes into contact with the hot air sent from the burner while rolling down in the drum while being scraped up by the scraping blades until it reaches a specified temperature. It is heated and temporarily stored in the recycled material hopper 13 at the end of the drum. Recycled material hopper
The heated reclaimed material temporarily stored in 13 is dropped into the transporting bucket 15 of the vertical transporting device 11 through the chute 14 by a predetermined amount, and is pulled up by the winch (not shown) to [the guide rail 16 made of die steel. The roller mounted on the bucket 15 is slidably contacted with the inner sliding surface to move up. And
When it reaches a position facing the charging port of the recycled material storage bin 12, the heating and recycled material is stopped and charged into the bottle.

On the other hand, the exhaust gas discharged from the recycled material dryer 10 is introduced into the dust collector 2 that processes the exhaust gas of the aggregate dryer 1, the dust in the gas is captured, passes through the exhaust fan 7, and is discharged from the stack 8 to the atmosphere. Released inside.

The recycled material dryer 10 and the dust collector 2 are assembled into a stand.
It is placed on 17 and stacked above the aggregate dryer 1 and is three-dimensionally arranged to save space.

A screen 18 for sieving the aggregate heated by the aggregate dryer 1 is mounted on the upper part of the mixing tower 3, and the aggregate sieved by the screen 18 is stored in an aggregate storage bin 19 below the screen 18. Stored. The aggregate storage bin 19 is configured to store the aggregate according to the grain size by partitioning the inside, and is formed larger than a normal storage capacity (about 8 to 10 batches) according to the stone powder storage bin described later. If necessary, the wall surface has a heat insulation structure.

On the side of the aggregate storage bin 19, there is provided a large stone powder storage bin 20 which replaces the vertical cylindrical stone powder storage silo conventionally installed on the ground surface apart from the mixing tower 3. The stone powder is supplied to the stone powder storage bottle 20 by pressure feeding from a ground truck.

Further, the recycled material storage bin 12 is also provided beside the aggregate storage bin 19 and is provided with a heat retaining structure as needed.
This recycled material storage bin 12, aggregate storage bin and stone powder storage bin
20 is incorporated in the upper layer portion of the mixing tower 3 assembled by the frame 21.

An aggregate measuring tank 22, a stone powder / dust measuring tank 23, and a recycled material measuring tank 24 are provided below the storage bin group. The aggregate or recycled material is discharged to the aggregate measuring tank 22 and the recycled material measuring tank 24 by gravity, and the stone powder / dust measuring tank 23 is discharged below the recycled material storage bin 12 and the dust storage bin 20. Screw feeder 25,26.
The material measured in the measuring tank is the lower mixer.
It is put into 27 and mixed and adjusted.

Reference numeral 28 denotes a vertical transfer device for transferring the asphalt mixture mixed and manufactured by the mixer 27 to the asphalt mixture storage silo 4, and has a structure similar to that of the vertical transfer device 11 described above. A line is attached, the line is wound up by a winch, and it is fed out to reciprocate between the lower part of the mixer 27 and the upper part of the asphalt mixture storage silo 4 to convey and store the asphalt mixture to the asphalt mixture storage silo 4.

Reference numeral 30 is, for example, an imaginary line showing a building in the case of covering the entire plant, which is a space-saving high-rise building by accumulating scattered equipment groups.

In this asphalt plant, however, a large amount of aggregate heated to a desired temperature by the aggregate dryer 1 is stored in the aggregate storage bin 19 of the mixing tower 3 by the hot elevator 6, and a desired amount is generated by the recycled material dryer 10. The recycled material heated to the temperature is stored in the recycled material storage bin 12 by the vertical transport device 11, and if the shipping amount is sufficient, the shipping operation is performed by operating only the mixing tower 3. In accordance with the composition of the mixture to be shipped, a predetermined amount of material is dispensed from each storage tank to the mixer 27, mixed and adjusted, and shipped. Further, in the case where the shipment is temporarily concentrated, a method of preliminarily storing the mixed and adjusted asphalt mixture in the asphalt mixture storage silo 4 is adopted.

[Effects of the Invention] As described above, in the asphalt plant mixing tower according to the present invention, the aggregate storage bin 19 that stores the heated aggregate installed in the asphalt plant mixing tower 3 according to the grain size is provided beside the aggregate storage bin 19. Since a large stone powder storage bin 20 also serving as a stone powder storage silo and a recycled material storage bin 12 were arranged and incorporated into the mixing tower 3, the stone powder storage silo and the recycled material storage silo that were conventionally installed on the site were installed. No space is required, and space can be saved to effectively use the factory premises.

In addition, devices related to both storage silos for stone powder and recycled materials that have been conventionally installed on the ground surface, such as a stone powder elevator that lifts stone powder from the stone powder storage silo to the mixing tower 3, or a recycled material storage silo for the mixer 27. No need for a device for transferring wastewater, and since the recycled material storage bin 12 and the stone powder storage bin 20 are supported using the frame of the mixing tower 3, the device is simplified compared to the conventional system, and the number of parts and the number of members are increased. Can be significantly reduced.

Furthermore, by integrating the stone powder storage silo and the recycled material storage silo, which were conventionally installed separately from the mixing tower 3, into the mixing tower 3, the entire plant becomes compact, and the building covering the entire plant is simple and inexpensive. Can be installed.

Furthermore, as the stone powder storage bin 20 becomes larger, the aggregate storage bin 19
If it is also formed in a large size, a large amount of heated aggregate can be stored, and when the shipping amount is sufficient, shipping can be performed only by weighing and mixing in the mixing tower 3. It is possible to operate quietly even at night with less noise, making it an optimal plant for urban type.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an asphalt plant according to the present invention, FIG. 2 is a side view of a mixing tower, and FIG. 3 is a plan view of FIG. 1 ... Aggregate dryer, 2 ... Dust collector, 3 ... Mixing tower, 4 ... Asphalt mixture storage silo, 10 ... Recycled material dryer, 11 ... Vertical transport device, 12 ... Recycled material storage bin, 18 ... Screen, 19 ... Aggregate storage bin, 20 ... Stone powder storage bin, 22 ... Aggregate weighing tank, 23 ... Stone dust / dust weighing tank, 24 ... Recycled material weighing tank, 27 ... Mixer, 28 ... Vertical transport device

Claims (1)

[Scope of utility model registration request] 1. An aggregate dried by heating with an aggregate drier is sorted by particle size and stored in an aggregate storage bin, and a predetermined amount of the aggregate stored in the aggregate storage bin is weighed and put into a lower mixer. In addition, in a mixing tower of an asphalt plant that further measures a predetermined amount of stone powder and asphalt and puts them in a mixer and adjusts the mixture to produce an asphalt mixture, while forming a large aggregate storage bin for storing the aggregate, A mixing tower for an asphalt plant, which is equipped with a large stone powder storage bin that also functions as a stone powder storage silo and a recycled material storage bin that stores recycled material heated by a recycled material dryer, beside the aggregate storage bin.