KR102599013B1 - A mixer in which heat is circulated, a movable apparatus for manufacturing asphalt mixture using the same, and a method for manufacturing asphalt mixture using the same, and an asphalt mixture produced therefrom - Google Patents

Abstract

A thermal circulation mixer, a mobile asphalt mixture manufacturing apparatus using the same, a manufacturing method thereof, and an asphalt mixture manufactured therefrom are introduced.
The mobile asphalt mixture manufacturing apparatus of the present invention includes a first hopper into which aggregate is input; a first supply conveyor belt installed below the first hopper to transport aggregate discharged from the first hopper; a second supply conveyor belt disposed at a rear end of the first supply conveyor belt and transporting dried aggregate supplied from the first supply conveyor belt; An asphalt supply unit located on the path of the second supply conveyor belt and supplying asphalt onto the second supply conveyor belt; a mixer unit that mixes the aggregate and asphalt supplied from the second supply conveyor belt while heating; A burner for primary combustion of fuel so that combustion gas for heating aggregate and asphalt can be supplied to the mixer unit, one side is in communication with the burner, the other side is open, and an air supply port is formed to allow outside air to flow into the burner. A combustion chamber for secondary combustion by mixing combustion gas produced by primary combustion in the burner and external air introduced from the air supply port, the combustion chamber is built in, and its inner wall and the A flow path is formed between the combustion chambers, and a main chamber in which external air introduced along the flow path and secondary combustion gas are mixed between the open other end of the combustion chamber and the inner wall thereof to perform tertiary combustion, A heating unit including a blower that supplies external air to the flow path of the main chamber; and a main trailer in which the first hopper, the first supply conveyor belt, the second supply conveyor belt, the asphalt supply part, and the mixer part are sequentially installed on the upper part along the moving direction of the aggregate and asphalt, and are equipped with moving means on both sides to enable movement. Includes ;

Description

A thermal circulation mixer, a movable asphalt mixture manufacturing apparatus and method using the same, and an asphalt mixture. {A mixer in which heat is circulated, a movable apparatus for manufacturing asphalt mixture using the same, and a method for manufacturing asphalt mixture using the same , and an asphalt mixture produced there}

The present invention relates to a thermal circulation mixer, a mobile asphalt mixture manufacturing apparatus using the same, a manufacturing method thereof, and an asphalt mixture manufactured therefrom. More specifically, the present invention relates to a road surface so that it can be easily moved and the asphalt adhesion and compaction density can be improved. A mobile asphalt mixture manufacturing device capable of producing an asphalt mixture while heating and laying and compacting the produced asphalt mixture on a heated road surface, a manufacturing method thereof, and an asphalt mixture manufactured therefrom and a thermal circulation mixer used therefor. will be.

Generally, roads are paved using cement or asphalt, and when there is a need to quickly open the road, the asphalt paving method is mainly applied.

Asphalt pavement has the disadvantage of being inferior in durability to cement pavement, having a relatively high risk of plastic deformation in the summer, and requiring frequent road repairs due to the high possibility of road surface damage such as potholes during rainfall.

Asphalt paving is mainly done using fixed asphalt manufacturing equipment. After heating the road surface and cutting the heated area, the cut material is mixed with new asphalt concrete or new aggregate, asphalt, and additives and laid on the cut road surface area. Repackaging is carried out in this way.

At this time, the asphalt mixture manufactured in the fixed asphalt manufacturing facility is transported by dump truck. Especially in winter, the temperature of the surface in contact with the outside air decreases during the transportation process, resulting in a temperature difference between the entire asphalt mixture during the laying and compaction process. Compaction deviations due to temperature differences occur, which causes defects such as potholes and road damage.

Accordingly, insulating dump trucks or MTV (material transfer vehicles) have been developed to solve the above problems, but they are expensive and must be kept warm while transporting the asphalt mixture, which has the problem of increasing packaging costs.

Accordingly, in order to solve the above problems, the present inventor has developed a “mobile asphalt mixture manufacturing device, an asphalt mixture manufactured using the same, its manufacturing method, and a construction method using the mobile asphalt mixture manufacturing device.”

However, the heating means for producing the asphalt mixture is limited to the mixer, so the amount of heating heat is insufficient, and when moisture-rich aggregate is used, it takes a long time to dry the aggregate, which reduces productivity.

For reference, the amount of heat required to convert 1 kg of water (100℃) into steam is 538 kcal/hr (specific heat of water 1), and the amount of heat required to raise the temperature of 1 kg of aggregate by 1℃ is 0.2 kcal/hr (specific heat of aggregate) 0.2), there is an urgent need to develop technology that can heat the aggregate after first removing moisture in order to improve the productivity of asphalt mixtures.

The matters described as the above background art are only for the purpose of improving the understanding of the background of the present invention, and should not be taken as an acknowledgment that they correspond to prior art already known to those skilled in the art.

KR 10-1971865 B1 (2019.04.18.)

The present invention was developed to solve the above problems, and is a mobile device that has excellent mobility, can manufacture asphalt mixtures on-site and pave roads, and can easily manage the temperature of the manufactured asphalt mixtures. An asphalt mixture manufacturing device is provided.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description of the present invention.

The thermal circulation mixer of the present invention includes a mixer unit that heats and mixes aggregate and asphalt supplied from a conveyor belt, or toned bag half asphalt; and a main chamber installed with a partition wall bent on one side to divide the interior into a flow path and a combustion chamber, and a primary combustion chamber installed on one side of the main chamber to supply combustion gas that heats the aggregate and asphalt to the mixer. It includes a burner that generates combustion gas, and a blower that supplies outside air to the flow passage, wherein the partition wall is on one side to blow outside air introduced through the blower to secondary combustion of the combustion gas that is primarily burned in the burner. It includes a heating unit in which an air supply port is formed to supply to one side of the combustion chamber, and an open area is formed in the other side through which external air is introduced to allow third combustion of combustion gas secondary to combustion in one side of the combustion chamber, wherein the heating unit includes: Combustion gas is generated through primary combustion in the burner, and the primary combustion combustion gas is mixed with external air introduced through the air supply port on one side of the combustion chamber and undergoes secondary combustion, and the open area is on the other side of the combustion chamber. It is characterized in that it is mixed with external air introduced through and undergoes tertiary combustion to generate combustion gas supplied to the mixer unit.

The mixer unit includes a screw mixer that receives aggregate and asphalt and transports the aggregate and asphalt while primary heating them to produce an asphalt mixture; a main mixer that receives combustion gas from the heating unit, receives aggregate and asphalt from the screw mixer, and mixes them while performing secondary heating; and an exhaust pipe that discharges combustion gas supplied into the main mixer, wherein the heating unit further includes a recovery pipe branched from the exhaust pipe and connected to the main chamber, wherein the blower is installed in the path. The combustion gas discharged from the exhaust pipe is supplied to the main chamber and the combustion chamber along with new air absorbed from the blower, and is used for re-combustion, secondary combustion, and tertiary combustion of the unburned gas.

The mobile asphalt mixture manufacturing apparatus of the present invention includes a first hopper into which aggregate is input; a first supply conveyor belt installed below the first hopper to transport aggregate discharged from the first hopper; a second supply conveyor belt disposed at a rear end of the first supply conveyor belt and transporting dried aggregate supplied from the first supply conveyor belt; An asphalt supply unit located on the path of the second supply conveyor belt and supplying asphalt onto the second supply conveyor belt; a mixer unit that mixes the aggregate and asphalt supplied from the second supply conveyor belt while heating; A main chamber equipped with a partition wall bent on one side to divide the interior into a flow path and a combustion chamber, and a primary combustion chamber installed on one side of the main chamber to supply combustion gas that heats the aggregate and asphalt to the mixer. It includes a burner that generates combustion gas, and a blower that supplies outside air to the flow passage, wherein the partition wall is on one side to blow outside air introduced through the blower to cause secondary combustion of the combustion gas that is primarily burned in the burner. An air supply port is formed on one side of the chamber, and on the other side, an open area is formed through which external air flows in to cause third combustion of combustion gas secondary combustion on one side of the combustion chamber, so that combustion gas is produced through primary combustion in the burner. The primary combustion combustion gas is mixed with external air flowing in through the air supply port on one side of the combustion chamber to produce secondary combustion, and is mixed with external air flowing in through the open area on the other side of the combustion chamber to produce tertiary combustion. a heating unit that generates combustion gas that is combusted and supplied to the mixer unit; and a main trailer in which the first hopper, the first supply conveyor belt, the second supply conveyor belt, the asphalt supply part, and the mixer part are sequentially installed on the upper part along the moving direction of the aggregate and asphalt, and are equipped with moving means on both sides to enable movement. Includes ;

The mixer unit includes a screw mixer that receives aggregate and asphalt and transports the aggregate and asphalt while primary heating them to produce an asphalt mixture; a main mixer that receives combustion gas from the heating unit, receives aggregate and asphalt from the screw mixer, and mixes them while performing secondary heating; and an exhaust pipe that discharges combustion gas supplied into the main mixer, wherein the heating unit further includes a recovery pipe branched from the exhaust pipe and connected to the main chamber, wherein the blower is installed in the path. The combustion gas discharged from the exhaust pipe is supplied to the main chamber and the combustion chamber along with new air absorbed from the blower, and is used for re-combustion, secondary combustion, and tertiary combustion of the unburned gas.

The first hopper is characterized in that it is installed in the front upper part of the main trailer into which new aggregate is input, and the second hopper into which waste aggregate and additives generated in the field are input; And a third supply conveyor belt installed on one side of the second hopper and transporting the waste aggregate fed into the second hopper to the second conveyor belt, wherein the first hopper separates the aggregate and the additive. It is characterized in that it is divided into a plurality of partitions based on the partition wall.

It further includes an auxiliary trailer in which moving means are installed on both sides so that it can be moved by being integrated with the main trailer, and the second hopper and the third supply conveyor belt are installed on the top.

The present invention further includes a dryer, which has an inlet and an outlet on both sides, and heats the aggregate introduced inside to remove moisture, wherein the dryer is provided in the shape of a tube with both ends opened, and is mounted on the main trailer. A dryer body rotatably installed; a dryer burner that generates hot air to heat the dryer body; and a dryer circulation flow path connected to both ends of the dryer body to circulate hot air generated by the dryer burner.

The asphalt supply unit includes an asphalt tank containing asphalt therein; And an asphalt burner installed on one side of the asphalt tank to heat the inside of the asphalt tank.

The present invention may further include a road surface heating unit installed below the main trailer to heat the road surface on which the asphalt mixture is laid.

The road surface heating unit includes a road surface heating body provided in the shape of a box with an open bottom and installed at the lower part of the main trailer; and a road surface heating burner installed on one side of the road surface heating body to supply hot air into the road surface heating body.

The screw mixer may be arranged so that a plurality of transfer screws are stacked in the height direction and rotate alternately in the horizontal forward direction and the horizontal reverse direction.

The asphalt mixture manufacturing method of the present invention includes the process of preparing waste aggregate or new aggregate by spraying a regenerative additive when cutting the road surface; A process of first heating while mixing the prepared waste aggregate and new aggregate; The process of preparing asphalt by heating it; A process of preparing a primary mixture by mixing heated asphalt and aggregate with secondary heating; And a process of preparing an asphalt mixture by mixing the primary mixture with third heating, wherein the regenerative additives include SBS (Styrene-Butadiene-Styrene copolymer), SIS (Styrene-Isoprene-Styrene copolymer), and EVA (Ethylene). -Vinyl-Acetate), LDPE (Low-density polyethylene), HDPE (High-density polyethylene), rosin, wax, process oil, and rubber powder, and the process of producing the asphalt mixture includes a heating unit. The combustion gas generated in the mixer is supplied to the mixer unit, and the primary mixture is introduced into the mixer unit and mixed while heating using the tertiary combustion combustion gas, and the heating unit divides the interior into a flow path and a combustion chamber. A main chamber installed with a partition wall bent on one side inside, a burner installed on one side of the main chamber to generate primary combustion combustion gas to supply combustion gas for heating the aggregate and asphalt to the mixer, and the flow It includes a blower that supplies outside air to the flow path, wherein the partition wall has an air supply port on one side that supplies outside air introduced through the blower to one side of the combustion chamber for secondary combustion of combustion gas that is primarily burned in the burner. An open area is formed on the other side of the combustion chamber through which external air flows in to cause third combustion of the secondarily burned combustion gas on one side of the combustion chamber, and primary combustion occurs in the burner to generate combustion gas, and the first combustion gas is Combustion gas is mixed with external air introduced through the air supply port on one side of the combustion chamber and undergoes secondary combustion, and is mixed with external air introduced through the open area on the other side of the combustion chamber for tertiary combustion and is supplied to the mixer unit. It is characterized by generating.

The process of manufacturing the asphalt mixture includes heating the primary mixture using the tertiary combustion gas in the mixer unit, discharging the tertiary combustion gas through the exhaust pipe, and burning the combustion gas discharged through the exhaust pipe. It is characterized by mixing some of the gas with external air and using it in the secondary combustion and tertiary combustion processes.

The asphalt mixture of the present invention is characterized by being manufactured by the above-described production method.

According to an embodiment of the present invention, an asphalt mixture can be produced and laid on site, and a high-quality asphalt mixture can be produced, especially in terms of temperature management.

In addition, there is an advantage in that various types of asphalt mixtures can be manufactured depending on site conditions, etc.

In addition, heating the road surface before paving has the effect of improving pavement quality by improving the compaction and adhesion of the asphalt mixture, and has the effect of preventing problems caused by cold road surfaces, especially in winter or in cold regions. .

In addition, by producing and laying the asphalt mixture directly on site, there is an advantage of ensuring temperature uniformity, maintaining quality by securing road surface adhesion and compaction, as well as solving the cause of potholes that occur after laying existing asphalt.

In addition, by heating the asphalt and aggregate while sufficient combustion occurs in the screw mixer, there is an effect of improving fuel efficiency and productivity of the asphalt mixture.

1 is a diagram schematically showing a mobile asphalt mixture manufacturing apparatus according to an embodiment of the present invention;
Figure 2 is a diagram showing a first hopper divided by a partition wall according to an embodiment of the present invention;
Figure 3 is a diagram showing a heating unit according to an embodiment of the present invention,
Figure 4 is a cross-sectional view of the mixer unit and the heating unit according to an embodiment of the present invention viewed from the top.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in this description, the same numbers refer to substantially the same elements, and under these rules, the description can be made by citing the content shown in other drawings, and content that is judged to be obvious to those skilled in the art or that is repeated can be omitted.

In order to easily manage the temperature of the asphalt mixture, the present invention manufactures an asphalt mixture immediately on site using new aggregate or aggregate prepared by mixing new aggregate and waste aggregate generated on site, and immediately produces the asphalt mixture. The main feature is to improve the quality of road pavement by ensuring that the road is paved.

Figure 1 is a diagram schematically showing a mobile asphalt mixture manufacturing apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the mobile asphalt mixture manufacturing apparatus according to an embodiment of the present invention includes a first hopper 100 into which aggregate is input, and a first hopper 100 through which aggregate discharged from the first hopper 100 is transported. A supply conveyor belt 200, a dryer 300 for primary heating while drying moisture in the aggregate, a second supply conveyor belt 400 for transporting the dry aggregate discharged from the dryer 300, and a second supply conveyor An asphalt supply unit 500 that adds asphalt to the aggregate transported along the belt 400, and a mixer unit 600 that produces an asphalt mixture by mixing and heating the aggregate and asphalt transported along the second supply conveyor belt 400. ) and a heating unit 700 that supplies heated combustion air to the mixer unit 600 to suppress hardening of the asphalt mixture.

At this time, the dryer 300 is detachably coupled to the main trailer 10 as needed, and when the dryer 300 is removed, the first supply conveyor belt 200 transfers the aggregate directly to the second supply conveyor belt ( 400).

The first hopper 100 according to an embodiment of the present invention is preferably placed forward in the direction of travel of the main trailer 10, because the first hopper 100 contains aggregate, which is a material of the asphalt mixture. This is because the asphalt mixture is arranged to be completed toward the rear of the main trailer 10, where it is input, thereby minimizing unnecessary transport of the asphalt mixture or its materials, making temperature control easier and reducing manufacturing costs.

Figure 2 is a diagram showing a first hopper divided by a partition wall according to an embodiment of the present invention.

As shown in FIG. 2, the first hopper 100 according to an embodiment of the present invention is preferably provided divided into a plurality of areas by one or more partition walls 110, because one first hopper This is because new aggregate, waste aggregate, and various additives can be inputted separately into (100), allowing the work to be performed smoothly.

Various additives may be injected through the first hopper 100, or may be sprayed (recycled additives) during the process of cutting the road surface to prepare waste aggregate.

In the present invention, additives include, for example, fillers, reforming additives, process oils, and elastic chips. The filler is made of one or more selected from cement, slaked lime, and quicklime, and the process oil is aroma oil, paraffin oil, or naphtha. It is prepared including one or more selected from oils.

The additives of the present invention are not limited to the additives listed above, and various additives can be selectively used depending on requirements such as PG grade and specifications of the paved road.

More preferably, according to an embodiment of the present invention, the mobile asphalt mixture manufacturing device is a dryer (300) for the second hopper 800 and the waste aggregate of the second hopper 800 into which the waste aggregate and additives generated in the field are input. ) may further include a third supply conveyor belt 900 that transfers to ).

At this time, when the dryer 300 is removed, the third supply conveyor belt 200 is configured to directly supply the waste aggregate to the second supply conveyor belt 400.

At this time, it is desirable to inject new aggregate through the first hopper 100 and waste aggregate through the second hopper 800, because the amount of new aggregate and waste aggregate can be easily adjusted. This is because the operation of the dryer 300 can be controlled due to the difference in moisture content between waste aggregate and new aggregate.

Specifically, since the spray cutting method is usually used when preparing waste aggregate by cutting the road surface at the site, the prepared waste aggregate may contain a large amount of moisture and can be adjusted to be divided and injected with new aggregate as needed.

Accordingly, the operation of the dryer 300 can be selectively controlled depending on the moisture content of the aggregate input into the dryer 300, which has the effect of preventing an increase in cost due to unnecessary heating.

At this time, a first waste aggregate discharge port is provided on one side of the second hopper 800, and the third supply conveyor belt 900 transfers the waste aggregate discharged through the first waste aggregate discharge port to the dryer 300.

In addition, the second hopper 800 according to an embodiment of the present invention has a second waste aggregate outlet formed on the surface opposite to the first waste aggregate outlet, and has a direction inside from the first waste aggregate outlet to the second waste aggregate outlet. It may further include a waste aggregate screen (not shown) inclined downward.

Accordingly, the waste aggregate introduced into the second hopper 800 is selected according to particle size, and the waste aggregate contained within the standard particle size is discharged through the first waste aggregate discharge port through the waste aggregate screen to the third supply conveyor belt 900. It is transferred to the dryer 300, and the waste aggregate that does not meet the standard particle size is discharged to the outside of the second hopper 800 through the second waste aggregate discharge port along the waste aggregate screen formed to be inclined downward.

Accordingly, the quality of the manufactured asphalt mixture can be improved by allowing the operator to re-inject it into the second hopper 800 after going through a separate crushing process or by screening it, and further improve the quality of the pavement.

In addition, in the present invention, the second hopper 800, like the first hopper 100 described above, may be divided into a plurality of parts through partitions, etc. so that waste aggregates and additives can be selectively inputted by type.

More preferably, the mobile asphalt mixture manufacturing device according to an embodiment of the present invention is provided to be selectively coupled to the main trailer 10, and is provided with moving means on both sides so that it can be moved along the main trailer 10. It may further include an auxiliary trailer (20).

At this time, the second hopper 800 and the third supply conveyor belt 900 may be installed on the auxiliary trailer 20 and combined with the main trailer 10 to form an integrated unit. At this time, the third supply conveyor belt 900 ) is preferably installed so that the inclination angle can be adjusted so that waste aggregate can be supplied to the inlet of the dryer 300 installed on the main trailer 10.

Accordingly, the inclination angle of the third supply conveyor belt 900 can be adjusted according to conditions such as the size and location of the dryer 300 installed on the main trailer 10, thereby ensuring smooth assembly.

In the present invention, the transport means installed on both sides of the main trailer 10 and the auxiliary trailer 20 are various transport means capable of moving the main trailer 10 and the auxiliary trailer 20, such as wheels, wheels, and rollers. It can be applied.

The dryer 300 according to an embodiment of the present invention is for removing moisture contained therein by first heating aggregate made of waste aggregate or new aggregate, and includes a dryer body 310 provided in the shape of a tube with openings at both ends. and a dryer burner 320 that heats the dryer body 310 by generating hot air to dry the aggregate contained within the dryer body 310, and a dryer circulation passage 330 that circulates the hot air generated by the dryer burner 320. It consists of

The dryer body 310 has an aggregate inlet formed in front of the main trailer 10 and an aggregate outlet formed in the rear of the main trailer 10.

At this time, the dryer body 310 is preferably installed to be rotatable to facilitate movement and drying of the aggregate.

The dryer circulation passage 330 according to an embodiment of the present invention is configured to be connected to both ends of the dryer body 310 to connect the aggregate inlet and the aggregate outlet, and the dryer burner 320 is located on the dryer circulation passage 330. is installed in

Accordingly, the hot air generated in the dryer burner 320 is supplied to the aggregate inlet of the dryer body 310 along the dryer circulation passage 330, and moves along with the aggregate toward the aggregate outlet while primary heating and drying the aggregate.

At this time, the hot air whose temperature has been lowered while heating the aggregate moves through the dryer circulation passage 330 installed at the aggregate outlet, is reheated by the dryer burner 320, and is re-supplied to the dryer body 310 through the aggregate inlet.

Accordingly, the dryer burner 320 recovers some of the hot air whose temperature is higher than that of the surrounding area, reheats it, and supplies it, thereby minimizing energy consumption and further reducing manufacturing costs.

In the present invention, new aggregate, waste aggregate, or a mixed aggregate of new and waste aggregate can be used as the aggregate, and the mixing ratio can be adjusted according to the characteristics of the road to be paved.

The aggregate dried as described above is transported to the mixer unit 600 installed at the rear of the main trailer 10 along the second supply conveyor belt 400. At this time, the length of the second supply conveyor belt 400 is at a minimum. It is desirable to install it lengthwise.

The reason is that by minimizing the cooling of the first heated aggregate as it dries by being exposed to the air, costs can be reduced during the second and third heating thereafter.

Meanwhile, the asphalt supply unit 500 according to an embodiment of the present invention is installed near the second supply conveyor belt 400 to supply primary heated asphalt to the aggregate transported along the second supply conveyor belt 400. do.

More specifically, the asphalt supply unit 500 includes an asphalt tank 510 containing asphalt and an asphalt burner 520 installed on one side of the asphalt tank 510 to heat the asphalt contained within the asphalt tank 510.

Accordingly, when manufacturing an asphalt mixture, the asphalt burner 520 primarily heats the asphalt contained in the asphalt tank 510 and supplies it to the second supply conveyor belt 400.

More preferably, the asphalt tank 510 preferably further includes an asphalt stirring means (not shown) for stirring the asphalt inside so that the asphalt contained therein is evenly heated.

As described above, the primary heated aggregate and asphalt are transferred to the mixer unit 600 along the second supply conveyor belt 400.

The mixer unit 600 produces an asphalt mixture by heating and mixing the aggregate and the asphalt mixture. Specifically, one or more screw mixers 610 for mixing and transporting the aggregate and asphalt introduced inside and the lower part of the screw mixer 610. It consists of a main mixer 620 that mixes the aggregate and asphalt supplied from the screw mixer 610 with secondary heating to produce an asphalt mixture.

Figures 3 and 4 are cross-sectional views for explaining a mixer unit and a heating unit according to an embodiment of the present invention.

As shown in Figures 3 and 4, the screw mixer 610 according to an embodiment of the present invention is configured by installing a transfer screw 611 for transferring aggregate and asphalt inside an insulated body.

At this time, it is preferable that an insulating layer such as glass fiber is formed on the inside of the body surrounding the transfer screw 611. This is because it primarily prevents the heated asphalt and aggregate from being cooled by external air, thereby protecting the asphalt mixture being manufactured. This is because it can improve quality and increase productivity.

In the present invention, the screw mixer 610 can be provided in a one-layer or two-layer or more multi-layer structure depending on the required production volume of the mixture of aggregate and asphalt. At this time, it is preferable that the screw mixers 610 adjacent to each other up and down are installed to transport the aggregate and asphalt in opposite directions and move the aggregate and asphalt mixture in a zigzag direction.

Accordingly, the aggregate and asphalt are mixed and moved in the forward direction along the plurality of transfer screws 611, mixed and transferred again in the reverse direction, and mixed and moved again in the forward direction, allowing the asphalt and aggregate to be sufficiently mixed.

In the present invention, the screw mixer 610 can adjust the number of transfer screws 611 depending on the amount of asphalt mixture to be produced.

The aggregate and asphalt mixed through the screw mixer 610 are supplied into the main mixer 620 and mixed with secondary heating to form an asphalt mixture.

In the present invention, the screw mixer 610 and the asphalt mixture are heated using combustion gas (G) supplied from the heating unit 700, which will be described in detail in the description of the heating unit 700.

The heating unit 700 is installed on the side of the screw mixer 610 and mixes the exhaust gas discharged from the chamber 710 with the flow passage 711 and the main mixer 620 with the external air to form the chamber 710. ), a blower 720 that supplies air to the flow passage 711, a combustion chamber 730 installed inside the chamber 710 that receives air from the flow passage 711 at a plurality of locations, and air and fuel It is configured to include a burner 740 that supplies combustion gas (G) mixed and ignited into the combustion chamber 730.

At this time, the chamber 710 and the combustion chamber 730 are configured as a kind of double chamber, and the combustion chamber 730 is divided by a partition wall 733 inside the chamber 710, and the remainder excluding the combustion chamber 730 is provided. The space functions as a flow path 711 through which the air delivered from the blower 720 flows.

In addition, the flow path 711 serves as a buffer to separate the combustion chamber 730 from the wall of the chamber 710, thereby preventing the combustion gas (G) inside the combustion chamber 730 from being cooled by external air temperature. It performs the function of an insulating layer.

Through this, the combustion gas (G) flowing through the combustion chamber 730 can be supplied to the main mixer 620 with the maximum amount of heat preserved.

The burner 740 is installed outside the chamber 710, and is configured to mix fuel, such as oil or gas, with air and then ignite it to supply heated combustion gas (G). The burner 740 and the combustion chamber 730 are connected through a combustion pipe 741, and the combustion pipe 741 may be formed in the shape of a pipe penetrating the chamber 710.

As described above, the combustion chamber 730 is provided with a flow path 711 therebetween so as to be spaced apart from the wall of the chamber 710, and the combustion pipe 741 is formed in the shape of a pipe penetrating this spaced gap. do.

The mixture of fuel and air ignited in the burner 740 is primarily burned in the combustion pipe 741, increasing the amount of heat. However, the volume of the burner 740 and the combustion pipe 741 is relatively small, and the time it takes for the combustion gas (G) to pass through these structures is short, so the combustion gas (G) is not completely burned and remains in an incomplete combustion state. I do it.

Accordingly, additional air is supplied to the combustion chamber 730 so that the incompletely burned combustion gas (G) can be completely burned and the heat content can be further increased.

That is, the partition wall 733 that partitions the combustion chamber 730 is provided with an air supply port 731 and an open area 732 at separate locations, and the air supply port 731 is connected to the combustion pipe 741. It is provided on one wall of the combustion chamber 730 connected to, and the open area 732 is provided on the wall at the opposite end of the combustion pipe 741.

In this way, the air supply port 731 and the open area 732 are provided in the partition wall 733, so that the air supplied from the blower 720 can flow into the combustion chamber 730 through the flow passage 711. .

The combustion gas (G) primarily burned in the combustion pipe 741 spreads inside the combustion chamber 730 and reacts with the air supplied through the air supply port 731, causing secondary combustion, and the combustion chamber 730 As it moves toward the other side of 730, it reacts again with the air supplied through the open area 732, causing third combustion.

As the fuel is burned in three stages at the combustion pipe 741, one end of the combustion chamber 730, and the other end of the combustion chamber 730, the fuel is completely burned and the maximum amount of heat from the fuel can be extracted. , fuel consumption can be reduced and hot air with the maximum amount of heat can be supplied to the main mixer 620.

The completely burned combustion gas (G) flows into the main mixer 620 through the combustion gas supply port 734 formed at the bottom of the chamber 710, heating the aggregate and asphalt introduced into the main mixer 620. This maintains fluidity and provides heat so that they can be mixed well.

After heating the aggregate and asphalt, the combustion gas (G) is discharged to the outside through the exhaust pipe 621 installed in the main mixer 620, and some or all of the combustion gas (G) discharged through this exhaust pipe 621 is It flows into the blower 720 through the recovery pipe 721.

The blower 720 sucks in the relatively high temperature combustion gas (G) recovered through the recovery pipe 721 and a portion of the outside air and flows it back into the flow path 711 of the chamber 710.

This is to recycle the heat remaining in the recovered combustion gas (G) and supply it back to the main mixer 620. The recovered combustion gas (G) is reheated in the combustion chamber 730 and supplied to the main mixer 620. Can be resupplied.

At this time, when only the recovered combustion gas (G) is injected again into the combustion chamber 730, it is difficult to completely combust the fuel due to the small amount of oxygen inside the combustion gas (G), so additional outside air is sucked in from the blower 720. Provides oxygen. Through this, the heat of the combustion gas (G) can be utilized to the maximum extent and supplied to the main mixer (620).

As described above, the asphalt mixture produced in the main mixer is discharged from the rear end of the main trailer 10, so the asphalt mixture can be laid on the road surface.

When the asphalt mixture is laid on the road surface as described above, it is compacted using rollers, etc. and then cured to complete the road paving.

More preferably, the mobile asphalt mixture manufacturing apparatus according to an embodiment of the present invention further includes a road surface heating unit 11 installed below the main trailer 10 to heat the road surface on which the asphalt mixture is laid.

More specifically, the road surface heating unit 11 includes a road surface heating body 11a in the shape of a box with an open bottom, and one or more road surface heating burners 11b installed on one side of the road surface heating plate to supply hot air into the road surface heating body 11a. ) includes.

Accordingly, before laying the asphalt mixture on the road surface, the road surface heating unit 11 preheats the road surface to be paved, thereby preventing the asphalt mixture laid on the road surface from being damaged due to sudden temperature changes or reducing adhesion to the road surface. This has the effect of improving packaging quality.

Hereinafter, a method for producing an asphalt mixture according to an embodiment of the present invention will be described.

An asphalt mixture manufacturing method according to an embodiment of the present invention includes a process of preparing waste aggregate, a process of preparing aggregate by drying and mixing waste aggregate, new aggregate, and additives, a process of preparing asphalt, and prepared asphalt It includes a process of preparing a primary mixture while heating the aggregate and a process of mixing the primary mixture while heating it a third time to prepare an asphalt mixture.

The process of preparing waste aggregate can be prepared by cutting and pulverizing the road surface to be paved on site. More specifically, road surface cutting can use a spray cutting method to prevent dust, etc. from scattering.

When road surface cutting is completed, the cut road surface is crushed into a certain size according to the preset particle size of the aggregate to prepare waste aggregate.

When the waste aggregate is prepared as described above, new aggregate, waste aggregate, and additives are inputted through the first and second hoppers (100, 800), respectively, and the input raw materials are fed along the first and third supply conveyor belts (200, 900). It is transferred to the dryer 300.

In the present invention, the additive is SBS (Styrene-Butadiene-Styrene copolymer), SIS (Styrene-Isoprene-Styrene copolymer), EVA (Ethylene-Vinyl-Acetate), LDPE (Low-density polyethylene), HDPE (High-density polyethylene) , rosin, wax, process oil, and rubber powder may be included.

Meanwhile, the waste aggregate introduced into the second hopper 800 may be configured to be additionally screened for particle size through a screen installed inside and then transported through the third supply conveyor belt 900.

As described above, when the new aggregate, waste aggregate, and additives are supplied into the dryer body 310, the dryer heats and dries the new aggregate, waste aggregate, and additives using the dryer burner 320 and the dryer circulation passage 330. Prepare the aggregate.

The process of preparing asphalt is prepared by heating the asphalt contained in the asphalt tank 510 using an asphalt burner 520.

As described above, the heated aggregate and asphalt are loaded on the second supply conveyor belt 400 and transferred to the screw mixer 610.

At this time, a plurality of screw mixers 610 are stacked in the height direction, arranged to rotate alternately in the horizontal positive direction and horizontal reverse direction, and are provided to the upper screw mixer 610 through the second supply conveyor belt 400. The introduced materials are mixed and supplied to the main mixer (620).

At this time, the main mixer 620 receives high-temperature combustion gas from the heating unit 700 and reheats the aggregate heated in the dryer 300 and the asphalt heated in the asphalt supply unit 500 to maintain fluidity and mix. helps. In this process, the heating unit 700 can combust the fuel close to complete combustion by supplying additional air to the combustion gas several times.

To describe the combustion process in more detail, primary combustion of fuel occurs in the burner 740, and combustion gas generated by primary combustion undergoes secondary combustion inside the combustion chamber 730. Combustion can also be aided by introducing new outside air into the combustion chamber 730 and supplying additional oxygen.

Afterwards, external air is again supplied to the combustion gas discharged from secondary combustion in the combustion chamber 730 to cause tertiary combustion, and then the tertiary combustion gas is supplied to the main mixer 620 to be produced inside the main mixer 620. The primary mixture of asphalt and aggregate is heated.

By burning the combustion gas three times in this way, the combustion rate can be maximized to achieve combustion close to exchange combustion, and through this, the heat content of the fuel can be utilized to the maximum.

The tertiary combustion gas may be discharged to the outside through the exhaust pipe 621 after heating the primary mixture of asphalt and aggregate in the main mixer 620.

Some of the combustion gas discharged through the exhaust pipe 621 may be mixed with external air supplied to secondary combustion and tertiary combustion and supplied back to the combustion chamber 730.

In this way, by resupplying the discharged combustion gas, it is possible to recycle the amount of heat remaining in the combustion gas, and by also burning combustible substances volatilized from asphalt, the amount of heat of the combustion gas supplied to the main mixer 620 is maximized. It can be done.

The mixture prepared as above is finally heated and mixed in the main mixer 620 to produce an asphalt mixture, and the work is completed.

As described above, although the present invention has been described with reference to preferred embodiments, those skilled in the art may make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can do it.

10: Main trailer 11: Road surface heating unit
11a: road surface heating body 11b: road surface heating burner
20: Auxiliary trailer 100: First hopper
200: first supply conveyor belt 300: dryer
310: dryer body 320: dryer burner
330: Dryer circulation path 400: Second supply conveyor belt
500: Asphalt supply unit 510: Asphalt tank
520: Asphalt burner 600: Mixer unit
610: screw mixer 620: main mixer
700: Heating unit 710: Main chamber
711: Flow path 720: Blower
730: Combustion chamber 731: Air supply port
732: Open area 740: Burner
741: Combustion pipe 800: Second hopper
900: Third supply conveyor belt

Claims (14)

A mixer unit that heats and mixes aggregate and asphalt or toned bag half asphalt supplied from a conveyor belt; and
A main chamber equipped with a partition wall bent on one side to divide the interior into a flow path and a combustion chamber, and a primary combustion chamber installed on one side of the main chamber to supply combustion gas that heats the aggregate and asphalt to the mixer. It includes a burner that generates combustion gas and a blower that supplies outside air to the flow passage,
The partition wall is formed on one side with an air supply port for supplying external air introduced through the blower to one side of the combustion chamber for secondary combustion of the combustion gas primarily combusted in the burner, and on the other side, the secondary air from one side of the combustion chamber is formed. It includes a heating part in which an open area is formed into which external air flows in to allow third combustion of the burned combustion gas,
The heating unit generates combustion gas through primary combustion in the burner, and the primary combustion combustion gas is mixed with external air introduced through the air supply port on one side of the combustion chamber to produce secondary combustion, and on the other side of the combustion chamber. A thermal circulation mixer, characterized in that it is mixed with external air introduced through the open area and undergoes tertiary combustion to produce combustion gas supplied to the mixer unit.
In claim 1,
The mixer unit,
A screw mixer that receives aggregate and asphalt and transports the aggregate and asphalt while primary heating them to produce an asphalt mixture;
a main mixer that receives combustion gas from the heating unit, receives aggregate and asphalt from the screw mixer, and mixes them while performing secondary heating; and
It includes an exhaust pipe that discharges combustion gas supplied into the main mixer,
The heating unit,
Branched from the exhaust pipe and connected to the main chamber, it further includes a recovery pipe in which the blower is installed,
The combustion gas discharged from the exhaust pipe is supplied to the main chamber and combustion chamber along with new air absorbed from the blower, and is used for re-combustion, secondary combustion, and tertiary combustion of unburned gas. mixer.
A first hopper into which aggregate is input;
a first supply conveyor belt installed below the first hopper to transport aggregate discharged from the first hopper;
a second supply conveyor belt disposed at a rear end of the first supply conveyor belt and transporting dried aggregate supplied from the first supply conveyor belt;
An asphalt supply unit located on the path of the second supply conveyor belt and supplying asphalt onto the second supply conveyor belt;
a mixer unit that mixes the aggregate and asphalt supplied from the second supply conveyor belt while heating;
A main chamber equipped with a partition wall bent on one side to divide the interior into a flow path and a combustion chamber, and a primary combustion chamber installed on one side of the main chamber to supply combustion gas that heats the aggregate and asphalt to the mixer. It includes a burner that generates combustion gas and a blower that supplies outside air to the flow passage,
The partition wall is formed on one side with an air supply port for supplying external air introduced through the blower to one side of the combustion chamber for secondary combustion of the combustion gas primarily combusted in the burner, and on the other side, the secondary air from one side of the combustion chamber is formed. An open area is formed through which external air flows in to cause third combustion of the burned combustion gas, and primary combustion occurs in the burner to generate combustion gas. The primary combustion gas is discharged from one side of the combustion chamber through the air supply port. a heating unit that mixes with external air introduced into the combustion chamber for secondary combustion, and mixes with external air introduced through the open area from the other side of the combustion chamber for tertiary combustion to produce combustion gas supplied to the mixer unit; and
A main trailer in which the first hopper, the first supply conveyor belt, the second supply conveyor belt, the asphalt supply part, and the mixer part are sequentially installed on the upper part along the movement direction of the aggregate and asphalt, and are equipped with moving means on both sides to enable movement; A mobile asphalt mixture manufacturing device comprising a.
In claim 3,
The mixer unit,
A screw mixer that receives aggregate and asphalt and transports the aggregate and asphalt while primary heating them to produce an asphalt mixture;
a main mixer that receives combustion gas from the heating unit, receives aggregate and asphalt from the screw mixer, and mixes them while performing secondary heating; and
It includes an exhaust pipe that discharges combustion gas supplied into the main mixer,
The heating unit,
Branched from the exhaust pipe and connected to the main chamber, it further includes a recovery pipe in which the blower is installed,
Combustion gas discharged from the exhaust pipe is supplied to the main chamber and combustion chamber along with new air absorbed from the blower, and is used for reburning, secondary combustion, and tertiary combustion of unburned gas. A mobile asphalt mixture. Manufacturing equipment.
In claim 3,
The first hopper,
Characterized in that new aggregate is introduced and installed at the front upper part of the main trailer,
A second hopper into which waste aggregate and additives generated on site are input; and
It further includes a third supply conveyor belt installed on one side of the second hopper and transporting the waste aggregate introduced into the second hopper to the second conveyor belt,
The first hopper is a mobile asphalt mixture manufacturing device, characterized in that it is divided into a plurality of partitions based on a partition wall so that aggregate and additives can be separately introduced.
In claim 5,
A mobile asphalt mixture manufacturing apparatus further comprising: an auxiliary trailer with moving means installed on both sides so that it can be moved by being integrally coupled with the main trailer, and with the second hopper and a third supply conveyor belt installed on the upper part.
In claim 3,
It further includes a dryer, which has an inlet and an outlet on both sides, and heats the aggregate introduced inside to remove moisture,
The dryer is
A dryer body provided in the shape of a tube with openings at both ends and rotatably installed on the upper part of the main trailer;
a dryer burner that generates hot air to heat the dryer body; and
A mobile asphalt mixture manufacturing device comprising: a dryer circulation flow path connected to both ends of the dryer body to circulate hot air generated in the dryer burner.
In claim 3,
The asphalt supply department,
Asphalt tank containing asphalt inside; and
A mobile asphalt mixture manufacturing device comprising: an asphalt burner installed on one side of the asphalt tank to heat the inside of the asphalt tank.
In claim 3,
A mobile asphalt mixture manufacturing device further comprising a road surface heating unit installed below the main trailer to heat the road surface on which the asphalt mixture is laid.
In claim 9,
The road surface heating unit,
A road surface heating body provided in the shape of a box with an open bottom and installed at the lower part of the main trailer; and
A road surface heating burner installed on one side of the road surface heating body to supply hot air into the road surface heating body. A mobile asphalt mixture manufacturing device comprising a.
In claim 4,
The screw mixer,
A mobile asphalt mixture manufacturing apparatus, characterized in that a plurality of the transfer screws are stacked in the height direction and arranged to rotate alternately in the horizontal forward direction and the horizontal reverse direction.
A process of preparing waste aggregate or new aggregate by spraying a regenerative additive when cutting the road surface;
A process of first heating while mixing the prepared waste aggregate and new aggregate;
The process of preparing asphalt by heating it;
A process of preparing a primary mixture by mixing heated asphalt and aggregate with secondary heating; and
A process of producing an asphalt mixture by mixing the primary mixture with third heating,
The regenerative additives include SBS (Styrene-Butadiene-Styrene copolymer), SIS (Styrene-Isoprene-Styrene copolymer), EVA (Ethylene-Vinyl-Acetate), LDPE (Low-density polyethylene), HDPE (High-density polyethylene), Contains at least one of rosin, wax, process oil, and rubber powder,
In the process of manufacturing the asphalt mixture, the combustion gas generated in the heating unit is supplied to the mixer unit, and the primary mixture is introduced into the mixer unit and mixed while heating using the tertiary combustion combustion gas. The unit has a main chamber installed with a partition wall bent on one side to divide the interior into a flow path and a combustion chamber, and is installed on one side of the main chamber to supply combustion gas that heats the aggregate and asphalt to the mixer unit for primary combustion. It includes a burner that generates combustion gas, and a blower that supplies outside air to the flow passage, wherein the partition wall is on one side to blow outside air introduced through the blower to secondary combustion of the combustion gas that is primarily burned in the burner. An air supply port is formed on one side of the combustion chamber, and on the other side, an open area is formed through which external air flows in to cause third combustion of combustion gas secondary combustion on one side of the combustion chamber, and primary combustion occurs in the burner to produce combustion gas. generates, and the primary combustion combustion gas is mixed with external air introduced through the air supply port on one side of the combustion chamber to cause secondary combustion, and is mixed with external air introduced through the open area on the other side of the combustion chamber to produce 3 A method of producing an asphalt mixture, characterized in that combustion gas is produced by secondary combustion and supplied to the mixer unit.
In claim 12,
The process of producing the asphalt mixture is,
After heating the primary mixture using the tertiary combustion gas in the mixer unit, the tertiary combustion gas is discharged through the exhaust pipe,
An asphalt mixture manufacturing method, characterized in that some of the combustion gases discharged through the exhaust pipe are mixed with external air and used in secondary combustion and tertiary combustion processes.
An asphalt mixture prepared by the method of any one of claims 12 and 13.