DE2656117A1 - METHOD AND DEVICE FOR REGENERATING ASPHALT WASTE - Google Patents

Description

üinno .Michio JiF 7601

Case JIN 7601
tM / th

Jinno Michio, 6-3, Yasudadohri, Showa-ku, Nagoya-shi, Aichi-ken, Japan

Method and device for the regeneration of asphalt waste.

The invention relates to a method and a device for regenerating or recovering Asphalt such as is used for road construction.

In the case of road surface renewal, the asphalt commonly used for road construction is the this is generated as waste, usually discarded. The disposal of this asphalt waste not only leads to economic losses, but also pollution. Furthermore, the transport of the

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Jir.nc Michio JTN 7C01

Waste a considerable amount of time and money. This is also due to the global raw material crisis Disposal of this asphalt waste is to be regarded as undesirable.

Therefore, there has long been a need to reclaim or recycle asphalt. So far proposed recycling or regeneration methods are the asphalt waste with high frequency Waves or to heat directly with the flame; treating them with steam; them indirectly with to heat a highly heated oil; and / or crushing them. Neither of these procedures is different Reasons, for example a low profitability or a reduction in quality, economical satisfactory.

The object of the invention is therefore to provide a method and a device for regenerating or regenerating. Recycle asphalt to create that is suitable for practical use and does not impair the Quality of the asphalt.

This object is now achieved by the asphalt recovery method according to the invention for regeneration solved by asphalt waste, which is characterized in that one

Introducing steam into water held in a container to heat it;

introducing the asphalt waste into the hot water present in the container;

heating the asphalt waste in the water to a predetermined temperature to soften it; and the heated and softened asphalt waste brought into the water with the help of a mechanical separation device into separate aggregate grains or elements, the surfaces of which are covered with a thin

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Asphalt layer are covered, separates.

The invention also relates to a device for carrying out this method, which is characterized by

a container for holding water to a predetermined level;

means for introducing steam into the water to be heated present in the container; and a device for the mechanical separation or division of the heated and softened by the steam Asphalt waste in the water.

According to a preferred embodiment of the invention steam is introduced into water in order to regenerate the previously discarded asphalt waste, whereby remarkably improved treatment effects can be achieved. One of the main features of the present Invention is to be seen in the fact that steam is introduced into water, whereby the asphalt waste in the presence be heated by water.

According to the asphalt waste are both during during heating as well as during their separation or division or comminution in the water. This is also an essential feature of the invention. The use of steam is also essential to the invention, but the desired effect is only achieved if the steam is used in combination with water. Hence this is based The method according to the invention is based on a principle that is fundamentally different from the previously known Regeneration system in which the asphalt waste is a Exposed to a steam atmosphere and thus heated. Although various heating media are known, according to the invention, high temperature steam is used to the asphalt waste present in the water

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to heat.

With the method according to the invention, the asphalt waste to be regenerated or processed in the state as they are tarred and to be renewed Road surface are removed. In other words, sorting or washing of the garbage pieces is not necessary. This represents a considerable advantage in practice. If the material is used before the regeneration treatment must be sorted or washed, there is a considerable expenditure of time and high costs, in particular when there is a very large volume of asphalt waste to be treated.

In the method according to the invention there is the further advantage that due to the fact that the asphalt waste that has been softened and brought into the water is separated from one another or divided or crushed will,. the aggregates formed do not adhere to the treatment tank or other aggregates.

Furthermore, the separation or division or comminution of the softened and into the Water brought in asphalt waste has the further advantage that only individual aggregate grains from each other are separated and the aggregate granules as such are not broken or crushed. This is of considerable importance, especially as regards the strength of the material. As is well known, the The shape or the design of the aggregate grains is a significant factor that determines the strength of the Material formed asphalt cement influences or determines. For this reason, asphalt regeneration systems, in which the aggregates are destroyed, for example the grinding process, for practice not suitable. In contrast, the invention

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According to the method, the aggregates are only separated from one another and retain their original shape so that the problem of strength deterioration does not arise.

Further embodiments, objects and advantages of Invention emerge from the further description in which reference is made to the accompanying drawings is. In these drawings show:

1 shows a schematic vertical sectional view of an asphalt regeneration device according to the invention;

2 shows a plan view of a further asphalt regeneration device according to the invention;

Fig. 3 is a schematic vertical sectional view of part of the asphalt) shown in Fig. 2 regeneration device;

4 shows a schematic plan view of a further asphalt regeneration device according to the invention and

FIG. 5 is a side view of the device shown in FIG.

According to the invention, heated steam is first introduced into the water present in a container, into which the asphalt waste is then entered and heated to a predetermined temperature. Normally, the preferred temperature of the asphalt waste extends at atmospheric pressure of 80 to 100 ⁰ C and in particular about 90 ° C. (It goes without saying that other temperatures can be used when working under high pressure or under other unusual ambient conditions.) The asphalt waste heated in this way is separated or divided in the water with the aid of a suitable mechanical device. For example, the asphalt waste in the

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Container present water entered, heated for about 20 minutes to 80 to 100 ° C and in the water separated or divided into individual granules with the help of, for example, a snail.

In the separation or division according to the invention The mixture formed consists of a large number of aggregate grains, each of which has a surface with are covered by a thin layer of asphalt or a thin film of asphalt. The particle size of the aggregates depends on the amount of asphalt waste originally put into the water. The particle size can be uniform or inconsistent. The layer of asphalt on the surface of a granule of asphalt waste shows strong adhesiveness to the corresponding granule but not to others Aggregate granules or against the asphalt coating present on their surfaces. Hence one obtains a loose collection of aggregate granules with asphalt-coated surfaces that are independent of each other can move. Accordingly, these aggregate granules can easily be used if necessary be sorted or classified by sieves into the desired number of particle size groups.

The asphalt coating on the surfaces of the aggregates may contain a small amount of an active substance. Preferably the amount in which this active substance is present is in the range of 5 to 20% by weight, and more preferably about 10% by weight, on a weight basis. (The ratio can be varied depending on the intended use of the product, the type and dimensions of the aggregates, the particular type of asphalt, etc.) Although various active substances can be used ₇ , active china clay (kaolin or terra alba ) and activated carbon together

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used. Experimental investigations have shown that favorable results are obtained when the active ingredient consists of about 80 to 95% active china clay and about 2 to 5% activated carbon. The best results are achieved when using 90% active china clay and 10% activated carbon, although the results are to some extent dependent on other conditions of use.

The asphalt coating can also contain lime. Of the suitable lime content varies widely depending on the intended use of the product; yet it is usually beneficial to use about the same amount of lime as asphalt.

The mixture of the asphalt-coated aggregates having different particle size can be put to various uses as it is. The area of application can, however, be expanded if this material is divided into different groups with approximately the same Particle size is separated. For example, one can divide the mixture into the following four with the help of sieves Divide groups that are then used for different purposes:

a) granules ranging in diameter from 20 mm to 13 mm;

b) granules ranging in diameter from 13 to 5 mm;

c) granules with a diameter in the range of 5 now to 2.5 mm; and

d) granules less than 2.5 mm in diameter.

It is also possible to combine the aggregates of these different particle size groups in a suitable Mixing ratio to mix with each other.

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The following are particularly preferred embodiments the invention explained in more detail with reference to the accompanying drawings.

Fig. 1 shows that inside a container 4 in the following order one below the other a wire mesh 5, a steam pipe 3 and a comminuting device are arranged. If desired, the wire network 5 and the shredding device 6 can be dispensed with. At the bottom of the container 4 is a transport device, for example a screw 8 is arranged. The screw 8 can also serve as a separating device, so that the asphalt can be separated or divided without using the crusher 6 can. The screw 8 is also with the lower end of a conveyor 9 for upward conveyance of the hot connected with good. At the point where the asphalt waste from the upper end of the conveyor 9 are discharged, a selection or sorting device, for example a vibrating screen 11, is provided The sieve 11 is connected to the sorting lines 13. The steam pipes 2 of the boiler 1 are with the Container 4, the upward conveyor 9 and the screw 8 connected, in each of which a porous or arranged with openings provided steam pipe 3 is. The container 4 and the conveyor 9 are filled with water up to the predetermined level X. About the pores or openings in the steam pipe 3 is heated steam introduced or pressed into the water contained in the container 4.

The method of operation of the device according to the invention described above will be explained in more detail below.

The asphalt waste blocks 15 are from above into the container 4 thrown, which can be effectively done with the help of a shovel loader. the

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Blocks are first roughly sorted with the aid of the wire mesh 5. In the embodiment shown in FIG. 1, the water level X is located in the container 4 above the wire mesh 5. From the boiler is heated via the steam pipes 2 and 3 in the in the Container 4 containing water is introduced, whereby the temperature of the system is brought to a reasonable value is, for example to a temperature of 90 ° C. The asphalt waste heated in this way are divided into the units with the help of the shredding device 6 and / or the screw 8 or broken up. The units separated from one another in this way are moved with the aid of the upward conveyor 9 transferred to the vibrating screen 11, where they are in the desired number according to their particle size separated by particle size groups.

The aggregates separated and sorted in this way are combined with a volatile liquid and a Emulsifiers mixed and then processed into regenerated asphalt blocks (room temperature asphalt blocks). It is still possible to obtain a regenerated asphalt mix by sorting the Heated aggregates. In this way the asphalt waste can be regenerated and used again for the usual training be used by road surfaces.

The following is a further embodiment of the invention Asphalt waste regenerating apparatus explained with reference to Figs.

Although two containers 10 and 12 are shown in FIG you can work with any number of containers. This means that you can be a single or more than two containers, depending on the situation. The containers 10 and 12 are connected to the drive source 18

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connected, which is controlled via the control device 20 will. The container 10 is connected to a boiler so that it becomes possible under high pressure introduce standing heated steam into the container. Similarly, the container 12 is with the kettle 22, from which it is supplied with high-pressure, highly heated steam. The boilers can also be united in a boiler.

The essential features of the device described above will be considered in the following with reference to FIG Fig. 3 described. The boiler 22 is provided with a plurality of tubes 26, some of which are connected to the conveyor 14 for upward conveyance of the hot material and in part with the interior of the container 12 in connection stand. The tube 26a in the container 12 is perforated or provided with openings through which the heated steam is introduced or pressed into the water. At the bottom of the container 12 is a separating device or Dividing device 28 arranged. The separator 28 shown in the embodiment is a Screw separator which effects the separation or division of the material to be treated during this this moves from left to right, as shown in the drawing. The container 12 is filled with water up to level X. The conveyor 14 for upward conveyance of the hot material is connected to the container 12 via the pipe 26. Therefore, the water level X in the container 12 and the Conveyor 14 the same. Asphalt waste blocks are entered into the container 12 from above and heated in the superheated water to the predetermined temperature. Then the blocks are to the right promoted, whereby they are separated into individual aggregate grains under the action of the screw. the Aggregate grains separated from one another in this way are moved upwards with the aid of the conveyor device 14

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conveyed and from there into the sorting device 16 (for example a sieve) where they are separated into different particle size groups.

In this embodiment, the appropriate one extends Temperature of the water from 80 to 100 ° C and is in particular around 90 ° C. The temperature is however variable according to the special environmental conditions, especially when working under increased pressure.

Indeed, the separator 28 is not limited to one screw separating direction. The sorting facility or the sieve device 16 is preferably designed in such a way that it cuts the aggregate grains accordingly their diameter can be divided into four groups, that is, groups with particles following Diameter:

a) 20 mm to 13 mm,

b) 13 mm to 5 mm,

c) 5 mm to 2.5 mm and

d) less than 2.5 mm.

It can be seen that, depending on the requirements, a sorting or classification with respect to other particle sizes can be made.

As shown in Fig. 2, the particles of each group, with the aid of the sieve device 16 have been sorted (which aggregate grains are coated on the surface with a layer of asphalt which are the sticking together of the aggregate grains prevented) in the corresponding hopper. For example, the granules are marked with a Diameter from 20 mm to 13 mm fed to the hopper. The granules with diameters from 13 mm to 5 mm are the hopper 34, which is with a

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Diameter from 5 mm to 2.5 mm the hopper 36 and those with a diameter of less than 2.5 mm are fed to the hopper 38. In a similar way hoppers 40, 42, 44 and 46 are provided, which are used to receive the aggregate granules with diameters of 20 to 13 mm, 13 to 5 mm, 5 to 2.5 mm or less than 2.5 mm are provided. The hoppers 32, 34, 36 and 38 are connected to a common conveyor 41 connected, depending on the control signal of the control device 20 either from the right to moved left or left to right. The conveyor 41 is also provided with a reserve hopper 42 which serves to contain any suitable mixture. It can be seen that if necessary, more than one spare hopper can be arranged. At one end of the conveyor 41 is a working at room temperature Mixing device 43 arranged for dry asphalt, which via the conveyor 45 with a Clay kneading mixer 48 operating at room temperature is connected. The mixing device 48 is in turn connected via the conveying device 50 to an asphalt storage device 52 kept at room temperature. Any desired amount of room temperature asphalt can be withdrawn from the storage facility as required 52 can be removed. On the other hand, the other end of the conveyor 41 is with a heated mixing device connected to mix the dry asphalt. The mixing device 54 protrudes the conveyor 56 with the dry mixer 58 in connection, which in turn via a conveyor 60 is connected to the buffer tank 62. The heated asphalt mix can vary depending on the Needs can easily be taken from the buffer tank 62. The aggregates with a particle size of more than 20 mm are discharged in the direction of arrow 64.

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Furthermore, the hoppers 32, 34, 36 and 38 are provided with valves 32a, 34a, 36a and 38a, respectively. Through appropriate Controlling these valves via the control device 20 can be the mixing ratio of the Freely select asphalt mix. Furthermore, from the hoppers 40, 42, 44 and 46, the corresponding Asphalt mixture with uniform particle size removed via valves 40a, 42a, 44a and 46a, respectively will.

In the following, a further embodiment of the invention will be explained with reference to FIG. 4.

4 shows an underframe 110 which is movable due to the wheels 112. In the embodiment shown, the underframe is located on a truck with the driver's cab on the left. To the right of the cab, that is, behind it, as is arranged in FIG. 4, the underframe 110, which is connected to the Frame is integrated. If necessary, however, the underframe 110 can be accessed from the operator's cab or from the Frame can be separated by placing it on a trailer or other facility.

The treatment tank 114 is on the base 110 and is designed so that it can receive water up to a predetermined level. in the A separating device 116 is arranged in the lower region of the container 114. The special embodiment of the separator 116 is not critical, it being said that in the illustrated embodiment a screw system is used. The separating device 116 is connected to a conveyor device 118, which in the illustrated embodiment is a bucket elevator. The conveyor 118 extends from the separator 116 up to

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a position above the treatment container 114 and is inclined at an angle. The conveyor 118 is driven by the motor 120. A sorting device 122 is located at the front end of the conveyor device 118 arranged.

As shown in FIG. 4, the treatment tank 114 is connected to a boiler 124 via the pipe 126, so that the water filled in the tank 114 up to a predetermined level to the predetermined level Temperature is heated with the aid of steam which is introduced from the boiler 124. the The type of boiler 124 is not critical and a conventional boiler can be used.

The top of the treatment tank 114 is provided with a Opening 114a provided through which the asphalt waste to be treated can be introduced. It is natural possible to design the opening differently and, for example, to close the top and the container to be provided with an opening at another point.

In the illustrated embodiment, the top of the treatment tank 114 in that described above Way opened, whereupon the asphalt waste blocks with the help of the conveyor 128 up to opening 114a can be raised from where it is automatically fall into the water in the container. When the conveyor 128 is not in use, you can remove the asphalt waste blocks directly with the help of other equipment, for example a shovel loader, Enter into the container through opening 114a. The asphalt mixture to be treated is poured into the container 114 introduced and there with the help of the water, which by blowing in the steam from the boiler 114 on has been heated to the predetermined temperature

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heated to the specified temperature. The asphalt mixture softened in this way by the heating is comminuted or separated by the separating device 116 while it is being conveyed to the left (as shown in the drawing). After the division treatment, the aggregate granules separated from one another are transferred to the sorting device 122 with the aid of the conveying device 118.

An example of a sorting device 122 will be explained in more detail below. In the embodiment shown, a vibrating screen is used as the sorting device 122. The vibrating screen is vibrated and simultaneously moved back and forth from right to left (in the drawing) with the aid of the motor 130, whereby the treated material is sorted. In the particular embodiment shown, the material is divided into four groups according to the particle size. Below the sorting device 124, four guide devices or hoppers 132, 134, 136 and 138 are arranged, which the granules with diameters of 20 mm to 13 mm, from 13 mm to 5 mm, from 5 mm to 2.5 mm or less forward or record than 2.5 mm. The guide means or hopper 132, 134, 136 and 138 are provided with valves 132a _f 134a, 136a and 138a provided. By appropriately controlling the valves, the mixing ratio of the asphalt mixture can be set in the desired manner. Furthermore, the three guide devices or hopper 134, 136 and 138 are combined via the guide device or hopper 140 . Indeed, the outlet 132b represents the outlet of the guide device or hopper 132 , while outlet 140a is the outlet of the guide device or hopper 140.

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The subframe 110 is further provided with a drive source 142, a water tank 144 and a fuel tank 146 provided. The drive source 142 drives and is for the required motors Purpose connected to the motor 130 and the motor 148 (with which the separating device 116 is driven will). The water tank 144 is connected to the boiler 124 and furthermore to the treatment tank 114 via the pipe 150. The fuel container 146 supplies the boiler 124 with fuel.

The facilities described above can be operated manually, but are shown in FIG Embodiment automatically via the control device 152 controlled. The connection of the control device 152 with the individual devices is not shown, It must be said, however, that all connections are electrically secured. It is certainly possible operate some facilities automatically and the rest manually. However, this depends on the desires of the User. It can also be seen that the tube 126 with a valve 126a and the tube 150 with a Valve 150a are provided.

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Claims (9)

PATENT ANW '. LTE TER MEER - MÜLLER - STEINMEISTER D-8OOO Munich 22 D-48OO Bielefeld ",. "Triftstraße 4 Siekerwall 7 ZDOOlI / Dec 10, 1976 Jinno Michio JIN 7601 patent claims 1. Asphalt reclamation process for regenerating Asphalt waste, characterized in that one Introduces steam into water that is in a container, to heat it; the asphalt waste into the one present in the container enters hot water; heating the asphalt waste in the water to a predetermined temperature to soften it; and the heated and softened asphalt waste brought into the water with the help of a mechanical Separating device into separate aggregate grains or elements, the surface of which with a covered with a thin layer of asphalt. 2. The method according to claim 1, characterized in that the aggregate grains are eichnet or elements sorted into a predetermined number of particle size groups. 3. The method according to claim 1, characterized in that that before the asphalt waste is added to the water, an active preparation is added to the one present in the container Brings in water. 709825/0916 ORSGlMAL INSPECTED J \ n ~ o Michio CIN 7 601 4. The method according to claim 3, characterized in that g e mark eichnet that one as an active preparation a mixture of about 80 to about 95% active clay or active soil and about 20 to about 5% activated carbon used. 5. The method according to claim 1, characterized in that the asphalt waste is heated ^{to a temperature of about 80 to about 100 ° C. under atmospheric pressure.} 6. The method according to claim 5, characterized in that it is in the container existing water with a mixture of about 80 to about 95% active clay or active earth and about 20 to about 5% activated carbon and the aggregate granules or elements in a predetermined Sorted number of particle size groups. 7. Device for the regeneration of asphalt waste, characterized by a container (4) for holding water up to a predetermined level X; a device (1, 2, 3) for introducing steam into that which is present in the container and is to be heated Water; and a device for mechanical separation (6 and / or 8) of the heated and softened by steam Asphalt waste in the water (Fig. 1). 8. Apparatus according to claim 7, characterized in that the device for Introducing steam comprises steam pipes (3), some of which are provided with a plurality of openings, via which the steam can be introduced into the water (Fig. 1). 70982 5/0916 Michio 9. Apparatus according to claim 8, characterized g e k .e -η. η ζ e i c h η e t that they are a body (9) to promote the granules or elements produced by separating or dividing the heated and softened asphalt waste formed in the water, and means (11) for sorting the granules or has elements in a predetermined number of particle size groups (Fig. 1). 70982 5/0916