JP5945879B2 - Heated asphalt regeneration system - Google Patents

Description

  The present invention relates to an asphalt reclamation system that allows an asphalt layer (RAP) that is desired to be reclaimed to be stripped from its location and converted into recycled asphalt concrete (RAC), in particular, claim 1 Relates to an asphalt regeneration system for the prior art part.

  As is known, asphalt concrete obtained from a mixture of aggregate and bitumen is used on the upper roadbed as various layers such as corrosion layers, binders, rectifying layers and base layers. Each of these layers is made with recipes created in the laboratory for international standard methods to achieve different performance requirements. The different performance expected for each layer comes from recipes made with different maximum dimensions of the particles, different gradations and different proportions of bitumen. These performance requirements are also valid for layers realized using recycled asphalt concrete (RAC).

  Asphalt concrete applied to roads should be stripped after certain uses. Today, stripped asphalt concrete should be recycled for environmental conditions and used to make new asphalt concrete. Furthermore, it is economical to recycle the stripped asphalt concrete (hereinafter referred to as RAP) and use it to make new asphalt concrete. As the percentage of stripped asphalt usage increases in the production of new asphalt concrete, the economic benefits that result are increased.

  Therefore, in the relevant technical field, regeneration can be realized by using stripped asphalt concrete (RAP) for the production of new asphalt concrete. In the current technology, there are several technical regeneration methods used for asphalt regeneration.

  Whatever the regeneration method, the regeneration of RAP and the proportion of RAP in the new mixture will depend on the maximum grain size, tone, and the proportion of bitumen contained, as well as the results of measurements of the aging and fatigue properties of the bitumen involved. Stripped asphalt concrete can be added at a rate that allows the new mixture to achieve the desired performance characteristics.

  The most frequent regeneration method is to add the stripped asphalt concrete to the new asphalt mixture realized in the asphalt plant mixer at room temperature and at a determined rate. This method is called room temperature regeneration. Using this method, the maximum regeneration rate that can be obtained is 20%. In another frequent regeneration method, the RAP is brought to process temperature with a heating mechanism operating in conjunction with the existing asphalt plant, after which a new mixture is added to the asphalt plant. This method is called heat regeneration. Using this method, the regeneration rate is initially higher than the regeneration rate at room temperature regeneration, but during the heating of the RAP in this system and in the system, the RAP is advanced and fed into the asphalt plant mixer. Due to the shortcomings encountered in between, the regeneration rate decreases during use.

  One of the disadvantages mentioned above is that the bitumen in the RAP is heated, which results in the bitumen becoming fluid and sticky, so that the RAP can be heated and transported by a medium (heating drum and conveyor or elevating). May be drawn into the medium. As work continues, the RAP that is drawn deeper into the media wall and adheres reduces the efficiency of the mechanism (flow rate, heat, etc.). In addition, during work, the RAP adheres to the inner wall of the media and narrows the media to which the RAP is attached, so the RAP must be cleaned frequently and therefore the mechanism must be stopped and cooled. . This reduces the efficiency of the system. A second disadvantage is that the asphalt plant is freely heated before adding RAP to the new mixture in the mixer, and further, the uniformity of the mixture during transport of the mixture to the asphalt plant. This uniformity is once again not brought about. Another disadvantage is that in the current heat regeneration method, hot air obtained from a heat source (burner) directly and immediately hits the RAP containing bitumen during heating. This situation results in deterioration of the bitumen in the RAP that is already aging and fatigued.

  Another important drawback relates to the chemical additives used. As is known, various chemical additives improve RAP that has deteriorated due to aging and fatigue, and thus can provide RACs with higher performance and higher regeneration levels. To achieve the desired effect on RAP, such chemical additives that are desired to be effective on RAP should be used taking into account the entire mixture. In other words, the chemical additive should have a greater proportion in the mixture.

  As a solution to the above-mentioned problems, the present applicant has provided patent application WO200909058103. This application discloses a system having a body with a delivery passage having at least three edges and extending along the outer periphery. Accordingly, the RAP moves along the outer periphery of the body by the pallet inside the delivery passage, while the RAP is exposed to heat to have the required process temperature. After the desired process temperature is obtained, the RAP is stored in a storage tank, the temperature of this storage tank is maintained, and the RAP is automatically transferred to the asphalt plant mixer, where the asphalt plant mixer New asphalt and concrete production will be realized. Therefore, regeneration can be performed by bringing RAP to process temperature by efficient and uniform heating and adding necessary additives.

  However, when using this new and advantageous system, to make RAC from RAP, the system must work with an asphalt plant. As a result of the studies recognized by the applicant, it has been found that a new revision allows the system to be used for RAC production by operating independently of the asphalt plant.

International Publication No. 2009058103

  The present invention is a novel heated asphalt regeneration system that eliminates the above-mentioned drawbacks and provides new advantages in the related art.

  The purpose of the subject invention is to increase the heating efficiency of a system that supplies heated RAP to an asphalt plant for use in making new asphalt concrete, and therefore the objective is to use RAP in new asphalt mixtures. Is made available at the maximum rate.

  Another object of the subject invention is to make a RAC independent of an asphalt plant that will form a bitumen base from asphalt (RAP) where regeneration is desired.

  In order to achieve the above object, the present invention is a heated asphalt regeneration system for obtaining a RAC for use in the preparation of both asphalt layers (binder or bitumen base) from RAP material, which has a closed volume. A body; at least one RAP material delivery passage within the framework, the delivery passage embodied to generate a geometry having at least three edges; displaced and constant within the RAP material delivery passage A delivery path having a plurality of delivery plates positioned thereon at intervals; an outer air passage substantially surrounding the delivery path and circulating hot air therein; a specific temperature formed in the body and maintaining a specific temperature of the RAP A storage tank for storing the RAP in the storage tank; and heated asphalt comprising a discharge unit used to discharge the heated RAP material in the storage tank to the desired medium Relating to the reproduction system.

  The system is positioned in the inner volume of the body to lengthen the path for taking hot air into the body and hence efficiently supplied to the RAP by the heat source and circulated in the body, An inner air passage connecting a resulting air inlet pipe to the outer air passage, and at least one section extending near the delivery path.

  Another improvement of the system is that the system produces RAC from the heated RAP stored in the storage tank independently of the asphalt plant, RAP reached from the discharge mechanism, a predetermined amount of new bitumen and optionally at least Providing a mixer for mixing one chemical additive for a predetermined time.

  In a preferred embodiment of the present invention, at least a portion of the inner air passage comprises a portion that extends with the delivery passage so as to partially extend substantially parallel to the delivery passage.

  In another preferred embodiment of the present invention, the horizontal portion passes through the accumulation tank of the inner air passage.

  In another preferred embodiment of the present invention, the inner air passage is a lower part extending to the bottom of the body so as to connect the inner air passage to the outer air passage; A vertical portion extending to contact the inside of the delivery passage along a portion of the edge; a horizontal portion extending substantially horizontally at a continuation portion of the vertical portion; and extending to a continuation portion of the horizontal portion An exit portion is provided.

  In another preferred embodiment of the present invention, the outlet of the outer air passage is connected to a heating tank formed in the inner volume of the main body so that the hot air emitted from the outer air passage can be conveyed again to the inner volume of the main body. An intermediate connection is provided.

  In another preferred embodiment of the present invention, the heating tank includes at least one first guide vane and one second guide vane extending on a main body inner volume of the heating tank.

  In another preferred embodiment of the invention, the first guide vane is at least along a portion of the oblique edge of the body so as to have a constant distance between the first guide vane and the second guide vane. An extending flat portion is provided.

  In another preferred embodiment of the subject system, the second guide vane extends substantially starting from the point of the lower alignment of the first guide vane, and the lower alignment of the reservoir base It extends to near the department.

  In another preferred embodiment of the subject system, a bitumen supply unit is provided, which is controlled by an automatic control system that delivers new additional bitumen to the mixer at the desired time and in the desired amount. .

  In another preferred embodiment of the present invention, at least one chemical supply unit is provided, which is controlled by an automatic control system that allows the chemical additive to be dispensed at a desired time and in a desired amount. Transport to mixer.

  In another preferred embodiment of the subject system, a guidance unit is provided for guiding the material leaving the mixer to a RAC silo or asphalt plant.

  In another preferred embodiment of the subject system, the guide unit closes the silo outlet or the asphalt plant outlet in response to at least one silo outlet, at least one asphalt plant outlet, and an automatic control system command. At least one flap is provided.

  In another preferred embodiment of the subject system, the delivery plate is in substantial contact with the inner wall of the delivery channel to prevent the heated and adhesive RAP from sticking to the inner wall of the delivery channel. Dimension to advance.

  In another preferred embodiment of the subject system, the subject system operates independently of the asphalt plant and produces a RAC for use in bitumen-based creation.

  In another preferred embodiment of the subject system, when working with an asphalt plant, a RAC is created for use in creating a wear layer or binder.

The subject invention is a heated asphalt regeneration method applied to obtain RAC by use of RAP when RAP is used to make one of the asphalt layers by use of RAP, the following steps:
a) providing a body having a closed volume substantially insulated from the external environment;
b) advancing the RAP into a delivery passage extending in a direction defining at least three corners in the body;
c) circulating the hot air obtained from the hot air supply part into the main body inner volume part so as to enable heat transfer to the specific part of the RAP in the delivery passage during the advancement step;
d) circulating hot air along the outer periphery of the body to allow heat transfer to a specific part of the RAP within the delivery passage;
e) circulating the hot air by guiding the hot air into the body to allow direct and indirect heat transfer to the RAP;
f) circulating the heating RAP in the main body so as to guide the RAP to the accumulation tank in which the RAP is accumulated;
g) transporting heated RAP in the storage tank to the mixer in a predetermined configuration h) transporting new additional bitumen and optionally at least one chemical additive to the mixer in a predetermined configuration;
i) heating comprising mixing heated RAP material, new additional bitumen and optionally at least one chemical additive in a mixer for a predetermined time and discharging the mixture to a desired outside environment This is an asphalt regeneration method.

  In another preferred application of the subject method, in step (c), the hot air is partially circulated near the delivery path so as to be substantially parallel to the delivery path.

  In another preferred application of the subject method, in step (c), hot air passes through a storage tank.

  In another preferred application of the subject method, in step (e), the hot air circulates to advance along a particular portion of the beveled edge of the body.

  In another preferred application of the subject method, in said step (j), the material leaving the mixer is guided to an asphalt plant for operating options with an asphalt plant or an operating option without an asphalt plant Will be guided to the silo.

  In another preferred application of the subject method, a RAC material is produced that will form a bitumen base when operating independently of an asphalt plant.

  In another preferred application of the subject method, a RAC material is produced that, when working with an asphalt plant, will form a wear or binder layer.

  The detailed description set forth with reference to the drawings of the present invention provides a more accurate understanding of the structure and properties of the subject invention and all of the advantages. Accordingly, the present invention should be evaluated in conjunction with the detailed description and figures set forth below.

1 is a representative diagram of a system to which the subject asphalt regeneration system is applied. 1 is a single perspective view of the subject asphalt regeneration system. FIG. 1 is a perspective view of the inner structure of the subject asphalt regeneration system. FIG. It is a figure which shows the inner structure of the subject asphalt reproduction | regeneration system. It is a figure which shows the inner structure of the subject asphalt reproduction | regeneration system. It is a figure which shows the inner structure of the subject asphalt reproduction | regeneration system. It is a figure which shows the inner structure of the subject asphalt reproduction | regeneration system.

1 is a representative diagram of operation of a subject asphalt regeneration system with an asphalt plant. FIG.

1 is a representative diagram of the operation of a subject asphalt regeneration system without an asphalt plant. FIG.

  In this detailed description, in order to make the subject more understandable, the subject heated asphalt regeneration system will be described with reference to the drawings without the creation of any limiting effect.

  Referring to FIG. 1, the hot air required for the subject heated asphalt regeneration system (hereinafter referred to as RS) is preferably supplied by a hot air generator (70), preferably a burner. In this application of the subject invention, air supplied by the hot air generator (70) and having a temperature of 650 ° C. is reduced to 400-450 ° C. by an air cooling system at the outlet of the hot air generator (70). Hot air is supplied from the hot air generator (70) to the RS by an air inlet pipe (241). Depending on the outside environmental conditions, the temperature of the hot air that advances along the air inlet tube (241) in direct contact with the outside environment decreases until the hot air reaches the RS inlet, for example in a preferred application, the air entering the RS. Has a temperature between 390 and 440 ° C.

  The room temperature RAP material processed by the RS and the additional aggregate mixed with the room temperature RAP material are conveyed to the RS by the input unit (10). The charging unit (10) includes at least one additional aggregate silo (11), at least one cold RAP silo (12), a band conveyor (13) positioned under the silo (11, 12), a band There is a vertical elevator (14) positioned at the end of the conveyor (13). The silo (11, 12) has a metering unit (not shown) controlled by an automatic control unit of the RS. With this metering unit, the automatic control unit is able to transport the material to the band conveyor (13) for the proportion of room temperature RAP and additional aggregate used in the mixture, the details of which are determined by the following method Adjust the amount. For example, if 70% RAP material and 30% aggregate are used in the mixture, the RAP silo (12) metering unit and the aggregate silo (11) metering unit function for these proportions. The material supply unit continuously supplies the material to the band conveyor (13) at a desired ratio. As a result, the material on the band conveyor (13) is raised by the vertical elevator (14) to the supply inlet (28) on the upper edge of the RS, and the material is conveyed to the RS.

  Referring to FIG. 2a, the lower corner end of the RS comprises a body (20) having a vertically cut triangular cross-section and having an adiabatic closed volume. The heating process of the RAP material is realized in the main body (20). Accordingly, the hot air entering the body (20) through the air inlet tube (241), preferably through the lateral surface of the body (20), is conveyed to a normal temperature RAP that is circulated efficiently and uniformly in the system. At the end of the process, hot air is conveyed to the filter (71) by the air outlet pipe (247), and from the filter (71), the hot air is conveyed to the surroundings. For example, in one preferred embodiment, the temperature of the air that is between 390-440 ° C. at the inlet (241) is reduced to about 150-190 ° C. at the air outlet tube (247).

  Referring to FIGS. 3a and 3b, the RS has a delivery passageway (21) that extends along the inner periphery of the body (20) and preferably has a hollow rectangular cross section. Have. The delivery passageway (21) terminates (211) at a point close to the middle of the upper edge of the body (20), and this base is open, so that the carried RAP material is removed from the body (20). It accumulates in the accumulation tank (26) formed inside. The storage tank (26) preferably has an inverted trapezoidal cross section extending substantially downwardly from the upper side of the body (20).

  In more detail, referring to FIGS. 3b and 3c, there is a delivery path (23) in the delivery path (21), which circulates the room temperature RAP contained in the RS, while , Subjecting the RAP to heat as detailed below. The delivery path (23) has a plurality of delivery plates (231), and these delivery plates (231) are positioned with respect to each other so as to have a certain space between them, and with respect to the extending direction of the delivery passage (21). In the delivery passageway (21) so as to be substantially perpendicular. Accordingly, the RAP material advanced by the delivery plate (231) circulates in the delivery passageway (21).

  The delivery plate (231) is dimensioned to substantially contact the inner wall of the delivery passageway (21). Due to this dimension, the delivery plate (231) continuously strips off the inner wall of the delivery passageway (21) during circulation, so the delivery plate (231) is pulled deep and adheres due to temperature. Stripping RAP, in particular, the delivery plate (231) strips the bitumen from the wall, thus preventing the bitumen from accumulating on the wall, thereby reducing the inefficiency of heat transfer. prevent. This feature eliminates the problem of reduced thermal efficiency due to adhesive RAP, which was one of the largest handicaps in previous systems. The delivery plate (231) is preferably connected on a chain (232), the chain (232) is connected to a chain gear (233), and each chain gear (233) is connected to the body (20). Is positioned at one corner. Therefore, when the chain gear (233) is rotated by a drive mechanism (not shown) having a speed reducer and an electric motor controlled by an automatic control unit of the RS, the delivery path (23) is in the delivery path (21). Start moving. On the other hand, different drive systems may be used in alternative embodiments.

  Referring again to FIGS. 3b and 3c, the asphalt injected into the supply inlet (28) from the end of the vertical elevator (14) and preferably transported to the delivery path (23) by an asphalt supply screw (not shown). The room temperature RAP is moved along the delivery passage (21), and at the end of the delivery passage (21), the asphalt and the room temperature RAP are discharged to the accumulation tank (26) and accumulated from the accumulation tank (26). It is conveyed from the heating RAP outlet (261) of the tank (26) to the discharge unit with load cell (27). More particularly, as determined by the automatic control system, the valve (not shown) at the heating RAP outlet (261) is opened, so that heating RAP is injected into the load celled discharge unit (27). When the amount of heated RAP injected into the discharge unit with load cell (27) reaches a certain weight (for example, 1750 kg), the heated RAP is injected into the mixer (50). The weight is defined in the memory of the automated control system by pre-determining for the type of asphalt desired to be made and similar variables.

  Hot air supplied by a hot air generator (70) for use in making at least the bitumen base, as well as for making other bitumen layers, independent of the asphalt plant (90). Should be moved to the RAP carried in the delivery passageway (21) and heated most efficiently and indirectly so as not to damage the structural properties of the bitumen. In this regard, referring to FIGS. 2b and 3a, specially designed outer air passages (24) and inner air passages (25) allow hot air to flow in the RS body (20) as correlated with RAP. Circulation is realized.

  Thus, the air inlet tube (241) is connected to the inner air passage (25) embodied on the inner volume of the body (20). The inner air passage (25) is positioned at the lower side of the body (20) to connect the inner air passage (25) to the outer air passage (24) and has a U-shaped cross section (251). ); A vertical part (252) extending at a continuation part of the lower part (251) along a part of the vertical edge of the body (20) to contact the inside of the delivery passage (21); A horizontal portion (253) that extends essentially horizontally to pass through the storage tank (26) at a continuation portion of (252); and an outlet portion (254) that extends to a continuation portion of the horizontal portion (253). Prepare. Due to the special design of the inner air passage (25), the distance that the hot air advances in the body (20) is maximized, and during this circulation, the delivery passage (21) and thus the RAP has the greatest heat transfer. Brought about.

  Air exiting the inner air passage (25) is conveyed to the outer air passage (24) by the delivery pipe (248). The outer air passage (24) extends along the outer edge of the body (20) so as to contact the outside of the delivery passage (21) at each point. More specifically, the outer air passage (24) starts from the region where the storage tank (26) begins and extends along the upper edge of the body (20); the upper part (245); the upper part (245) An oblique portion (243) extending along the oblique side edge of the main body (20) at a continuation portion of the main body (20); a lower side portion (244) extending along the short side of the main body (20); It essentially comprises a vertical portion (242) extending along the vertical edge. Referring to FIGS. 2b and 3d, the continuation part of the upper part (245) extends parallel to the field outside the lateral surface of the main body (20) and extends from the other end to the inside of the main body (20). There is an interconnect (246) that opens into a heating bath formed in the volume. Therefore, the hot air coming out of the outer air passage (24) is conveyed again to the heating tank (22) on the opposite side.

  The heating bath (22) is defined by a first guide vane (221) and a second guide vane (222). The first guide vane (221) starts from the end of the delivery path (23), and the main body has a specific distance between the first guide vane (221) and the second guide vane (222). It extends along the oblique edge of (20). The second guide vane (222) starts at a certain point on the oblique edge of the main body (20) and extends to the lower alignment portion of the base of the storage tank (26), and the first guide vane (221) ) Extending substantially below the alignment portion.

  More specifically, the first guide vane (221) has a curved portion that starts from the end of the delivery path (23) and extends in a convex shape, and is opposed to the continuation portion of the delivery path (23). And a flat portion extending along the line. The second guide vane (222) has an inflection point in its middle region so that the flap defines an open V-shape, and because of this inflection point, the second guide vane (222) is initially It extends towards the base of the storage chamber (26) at a narrower angle with respect to the site and then at a near normal angle. On the other hand, the inner wall of the delivery passage (21) has an open structure so that hot air can be brought into direct contact with the RAP along the heating tank (22). Therefore, the hot air comes into direct contact with the RAP along the extending direction of the first guide vane (221), and then the hot air is lowered by the second guide vane (222) on the lower side portion of the accumulation chamber (26). It is conveyed to. Due to this feature and the horizontal part (253) of the inner air passage (25) through the storage tank (26), the heating RAP (100) in the storage tank (26) can keep the heat continuously. .

  In order to make the subject more understandable, the path taken by the hot air is indicated by arrows in FIGS. 3a and 3d, and the hot air enters the body (20) through the air inlet tube (241) and enters the inner air passage ( 25) along the outer air passage (24) and then guided towards the heating tank (22) in the main body (20) 22), moves from the heating tank (22) to the storage tank (26), and exits the body (20) by the air outlet pipe (247).

  As a result, a more efficient heat transfer to the RAP can be achieved by the special design of the inner air passage (25) and the special design of the outer air passage (24). Efficient heat transfer realizes that the heated RAP exiting the RS is at the desired temperature (preferably 120-130 ° C.), which is detailed below, regardless of the asphalt plant (90). As such, the heated RAP (100) from the RS can be processed and the heated RAP (100) can be used as a RAC that will form the bitumen base.

  In order to achieve the above, in the subject invention, in addition to the improvements described above, the mixer (50) is in the lower alignment of the discharge unit with load cell (27). In order to obtain a bitumen base, in addition to the heated RAP (100) exiting the RS, additional new bitumens and, if necessary, a plurality of chemicals that improve the properties of the material (eg antiwear chemicals) Should be added to the mixture. Accordingly, the bitumen supply unit (30) and the chemical substance supply unit (40) convey further bitumen and chemical additives to the mixer (50) at predetermined intervals, respectively. In this way, in the mixer (50), a mixture comprising heated RAP, fresh bitumen and optionally chemical additives is mixed for a desired period of time. Both the bitumen supply unit (30) and the chemical substance supply unit (40) are preferably equipped with one proportional pump (not shown) controlled by an automatic control system. Thus, prior to the process, the amount of bitumen and / or chemical added to the mixture is determined in the memory of the automatic control system and the metering pump (not shown) is controlled accordingly.

  On the other hand, the subject invention can be used with an asphalt plant (90), particularly where it is desirable to produce a binder layer or wear layer, so that the asphalt layer is the largest possible It can be made by an asphalt plant (90) using a proportion of RAP. Therefore, there is a guide unit (60) at the outlet of the mixer (50). The guide unit (60) has at least one RAC silo outlet (61) and at least one asphalt plant outlet (62), and a flap (63) whose movement is controlled by an automatic control system, these outlets according to the conditions. One of (61, 62) is closed. In other words, when it is desirable to operate independently of the asphalt plant to create the bitumen base, only the RS is used so the asphalt plant outlet (62) is closed and exits the mixer (50) Material is conveyed directly to the silo (80) through the silo tube. If it is desirable to run the RS together with the asphalt plant to create a binder or wear layer, the material coming out of the mixer (50) is then subjected to further processing, which is passed through the plant tube. It is conveyed to the plant mixer (91).

  It is desirable that the RAC used in the asphalt layer has certain characteristics. These standards are determined by national or international standards, and these standards also apply to asphalt concrete (RAC) made from RAP by RS.

  In order to produce RAC without using RAP in an asphalt plant, multiple inspections in the laboratory should be realized in advance, and accordingly, first, the aggregate that is the raw material used for production And the characteristics of the bitumen should be determined, and therefore a recipe for the mixture should be created that meets the optimum level of asphalt layer performance characteristics, which should be produced under certain process conditions. Various methods are used for recipe preparation, and the most frequent method is the Marshall method.

  Therefore, recipes created in the laboratory determine the gradation of aggregates that have certain physical, chemical and geometric properties and are used as raw materials, which is expected to be optimal from asphalt-concrete mixtures Performance characteristics (stability, specific gravity relative to actual volume, porosity, asphalt-filled voids, VFA and flow rate criteria) will be provided, and the percentage of bitumen added to the mixture will be determined.

  To make a RAC using RAP, laboratory testing must be accomplished using the method described above. The only difference here is that when creating the above-mentioned recipe, the characteristics of the RAP used in the mixture are taken into account. The most important factor in creating a RAC recipe is that characteristics such as bitumen penetration and smoothing points that RAP provides deteriorate due to effects such as fatigue and aging. Such property degradation is predetermined and is improved and optimized by a plurality of chemical additives. Of course, in RAC fabrication, stripped asphalt concrete is used with appropriate properties. The properties of the RAP material determine the usage ratio for RAC fabrication. The better the RAP properties, the higher the ratio of RAP material used in the new mixture. As a result of the inspection realized in the laboratory, various regeneration ratios can be obtained under various operating conditions. By taking these values into account, the subject asphalt regeneration system is operated by adapting to all of the different operating conditions.

  In addition to the details described above, the automatic control system used in the subject invention is heated within the body (20) to obtain a mixture suitable for the criteria for making one of the asphalt layers in the mixer (50). Room temperature RAP material; additional aggregate amount added to room temperature RAP; heated RAP (100) conveyed to mixer (50); additional new bitumen conveyed to mixer (50); and optionally automatic Essentially comprising a value relating to the amount of chemical additive in the memory of the control system, with regard to said value, the subject invention consists of a cold RAP silo (12), an additional aggregate silo (11), a band conveyor (13), a load The metered discharge unit (27), the bitumen supply unit (30) and optionally the chemical substance supply unit (40) are each controlled. The control system further controls the advance speed of the delivery path (23), the temperature of the air used in the system, the flow rate, the operation process of the mixer, and the timing and sequence of the processes described in this paragraph.

DESCRIPTION OF SYMBOLS 10 Input unit 11 Aggregate silo 12 Room temperature RAP silo 13 Band conveyor 14 Vertical elevator 20 Main body 21 Delivery path 211 Delivery path end 22 Heating tank 221 First guide vane 222 Second guide vane 23 Delivery path 231 Delivery plate 232 Chain 233 Chain gear 24 Outer air passage 241 Air inlet pipe 242 Vertical portion 243 Oblique portion 244 Lower side 245 Upper portion 246 Interconnection portion 247 Air outlet pipe 248 Delivery pipe 25 Inner air passage 251 Lower side 252 Vertical portion 253 Horizontal part 254 Outlet part 26 Accumulation tank 261 Heating RAP outlet 27 Discharge unit with load cell 28 Supply inlet 30 Bitumen supply unit 40 Chemical substance supply unit 50 Mixer 60 Guide unit 61 Silo outlet 62 Asphalt plant outlet 63 Flat 70 Hot air generator 71 Filter 80 RAC silo 90 Asphalt plant 91 Plant mixer 100 Heated RAP material

Claims (15)

A heated asphalt regeneration system for obtaining RAC to use the RAP material in the production of asphalt layer (binder or bitumen-based),
An insulated body (20) with a closed volume ;
Wherein a body at least one delivery passageway for (20) in the heated RAP material (100) (21), sending embodying to produce a geometric shape having at least three edges Passage (21);
A delivery path (23) provided thereon with a plurality of delivery plates (231) displaced in the delivery path (21) and positioned at regular intervals;
An outer air passage (24) substantially surrounding the delivery passage (21) and through which hot air circulates;
A storage tank (26) formed in the body (20) and stored at the specific temperature such that the RAP maintains a specific temperature; and the heated RAP material (100) in the storage tank (26) in hot asphalt reproducing system comprising a discharge unit (27) which is used to discharge the desired medium, for a longer path to take hot air into said body (20), i.e., circulating said body (20) In order to efficiently transfer heat to the RAP, an air inlet pipe (241) positioned in the inner volume of the body (20) and providing main hot air input to the body (20) is connected to the outer air passage (24 ) Connected to the inner air passage (25) , at least part of which extends near the delivery passage (23), and stored in the storage tank (26). The RAP arrived from the discharge unit (27), a predetermined amount of new bitumen and optional to make a RAC independent of the asphalt plant (90) from the heated RAP material (100) loaded A mixer (50) for mixing at least one chemical additive at a predetermined time
A heated asphalt regeneration system comprising:   At least a portion of the inner air passage (25) includes a portion that extends with the delivery passage (21) so as to partially extend substantially parallel to the delivery passage (21). The heated asphalt regeneration system according to claim 1. The heated asphalt regeneration system according to claim 1, characterized in that the horizontal portion (253) of the inner air passage (25) passes through the storage tank (26).   The inner air passage (25) has a lower side (251) extending to the bottom of the body (20) to connect the inner air passage (25) to the outer air passage (24); A vertical portion (252) extending at a continuation portion of the side portion (251) along a part of a vertical edge of the main body (20) to contact the inside of the delivery passageway (21); 252) a horizontal portion (253) extending substantially horizontally at the continuation portion; and an outlet portion (254) extending to the continuation portion of the horizontal portion (253). The heated asphalt regeneration system according to any one of items 1 to 3. Wherein the hot air exiting from the outside air passage (24) to allow again conveyed to the inner volume of the body (20), the inner volume of the body of the outlet (20) of the outer air passage (24) The heating asphalt regeneration system according to claim 1 or 4, characterized in that an intermediate connection (246) connected to the heating tank (22) formed in the above is provided. The heating tank (22) includes at least one first guide vane (221) and one second guide vane (222) extending on the inner volume of the main body (20). The heated asphalt regeneration system according to claim 5.   The first guide vane (221) has an oblique edge portion of the main body (20) such that the first guide vane (221) has a certain distance between the first guide vane (221) and the second guide vane (222). The heated asphalt regeneration system according to claim 6, further comprising at least a flat portion extending at least along a part of the heating asphalt regeneration system. The second guide vane (222) extends substantially starting from the point of the lower alignment portion of the first guide vane (221), and the lower side of the base of the storage tank (26) The heated asphalt regeneration system according to claim 6 or 7, characterized in that it extends to the vicinity of the section (251) .   A bitumen supply unit (30) is provided, and the bitumen supply unit (30) is controlled by an automatic control system, and a new additional bitumen is conveyed to the mixer (50) in a desired time and in a desired amount by the automatic control system. The heated asphalt regeneration system according to claim 1, characterized in that it enables. At least one chemical substance supply unit (40) is provided, the at least one chemical substance supply unit (40) being controlled by the automatic control system, wherein the automatic control system allows the chemical additive to be dispensed for a desired time and in a desired amount. The heated asphalt regeneration system according to claim 9 , characterized in that it can be conveyed to the mixer (50). The heated asphalt regeneration system according to claim 9 , characterized in that a guide unit (60) is provided for guiding the material leaving the mixer (50) to a RAC silo (80) or an asphalt plant (90).   The guide unit (60) includes at least one silo outlet (61), at least one asphalt plant outlet (62), and the silo outlet (61) or the asphalt plant in response to commands of the automatic control system. 12. A heated asphalt regeneration system according to claim 11, characterized in that it comprises at least one flap (63) closing the outlet (62).   In order to prevent the RAP from adhering to the inner wall of the delivery passage (21) when the RAP is heated and becomes adhesive, the delivery plate (231) is provided on the delivery passage (21). The heated asphalt regeneration system according to claim 1, wherein the heated asphalt regeneration system has a size so as to substantially contact the inner wall. 14. The heated asphalt regeneration system operates independently of the asphalt plant (90) and produces a RAC for use in bitumen-based production. The heated asphalt regeneration system according to one item. A heated asphalt regeneration according to any one of the preceding claims, characterized in that, when cooperating with the asphalt plant (90) , a RAC used for the production of a wear layer or binder is produced. system.

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