ES2600000T3 - Device for storing viscous media - Google Patents

Abstract

Device for the storage of viscous media, comprising the device (1) a. a container (2) for storage of the medium (3), b. an extraction pump (6) for the extraction of at least a partial volume of the medium (3), c. a jet device (12, 13), which has at least one jet nozzle (28, 29), arranged in the container (2), which is in extraction connection with the extraction pump (6), which enables a jet agitator (48) for agitation of the medium (3), the agitator jet (48) to be emitted from the jet apparatus (12, 13) being flared relative to a jet of propellant medium to be supplied to the jet (12, 13) and, therefore, presenting an increased volume and/or causing a reduced momentum loss of the medium (3) to be stirred for an intermixing of the medium in laminar flow conditions, characterized in that the apparatus (12, 13) has a first jet nozzle (28) comprising a first propulsion nozzle section (30), a first suction nozzle section (53), a first mixing nozzle section (31) and a first diffuser (32) as well as a second jet nozzle (29) arranged behind along d the longitudinal axis of the jet apparatus (18, 19), comprising a second propulsion nozzle section (33), a second suction nozzle section (54), a second mixing nozzle section (34) and a second diffuser (35).

Description

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DESCRIPTION

Device for storing viscous media

The invention relates to a device for storing viscous media, especially medium to high viscosity media.

US 3,166,020 discloses a device according to the preamble of claim 1 that can be economically produced.

WO 2008/034783 A1 discloses a process for the intermingling of a liquid that is in a closed container and a solid of fine particles.

EP 0 209 095 A2 discloses a procedure for gasification.

Document DE 26 44 378 A1 discloses a process for the introduction of carbon dioxide gas into a beverage that flows into a conduit.

Polymer bitumen is a dispersion of bitumen and polymers. Polymer bitumen is transcendental especially in the area of road construction. Polymer bitumen has only limited storage stability. In the case of a longer storage of the polymer bitumen, for example, in a tank in an asphalt mixing facility or in a product storage tank in a polymer bitumen manufacturer, an intermingling of the raw material is necessary of polymer bitumen. Intermingling is also required in the case of longer storage of the bitumen emulsion. A bitumen emulsion is a colloidal mixture of bitumen used in the construction of roads and water. The intermingling of the polymer bitumen of a bitumen emulsion can be done by mechanical stirrers. Mechanical agitators are suitable for intermingling medium viscosity media such as mud, especially putrid sludge, and foods such as tomato concentrate. Mechanical agitators are constructively complex and subject to wear. The organization and performance of maintenance and repair work on agitators of this type is complicated. Methods for mixing the stored polymer bitumen in which the stored polymer bitumen is circulated by pumping the storage vessel are also known. The intermingling of the stored polymer bitumen achieved during pumping is correspondingly limited to the volumetric capacity of the pump. Especially, a homogeneous mixture of the entire contents of the storage container is not guaranteed.

The aim of the present invention is to provide a device for the storage of viscous media, especially polymer bitumen, in which a homogeneous mixture of the stored medium is inexpensively guaranteed.

This objective is achieved by the features of claim 1. The essential part of the invention consists in providing a jet apparatus in a storage vessel that makes available a stirring jet for the agitation of the medium, presenting the stirring jet that is going to an increased volume is emitted from the jet apparatus with respect to a jet of propellant medium to be supplied to the jet apparatus and / or causing a reduced pulse loss. The jet apparatus has a first jet nozzle and a second jet nozzle that are arranged one behind the other along the longitudinal axis of the jet apparatus. This is achieved because the agitator jet is flared compared to the propellant jet. The stirring jet is bulky and flows at a relatively reduced flow rate, thus, especially with an increased volume flow and mass flow. According to the invention, it has been recognized that a homogeneous mixture of the entire contents of the container is reliably made by means of a stirring jet formed of this type. The device according to the invention provides the stirring jet having a relatively large flow cross-sectional area and a relatively reduced flow rate. Under laminar flow conditions in the medium to be agitated, the stirring jet may cause sufficient mixing of the medium in the case of low impulse loss. Especially, an intermingling is improved compared to an agitator jet having a relatively small cross-sectional flow surface and a high flow rate. In the case of medium and high viscosity media and usual measurements of a storage container, especially along a longitudinal axis of the storage container according to the state of the art, turbulent flow conditions cannot be generated or generated Only in a very expensive way. The device according to the invention is suitable for decreasing fundamentally without losing high relative speeds with losses in laminar flow conditions within a short mixing stretch. This makes it possible to avoid long stretches of mixing, especially with high relative speeds, within the storage vessel. Especially due to friction losses that are caused by the high viscosity at high speeds of the medium, long mixing sections are problematic for a complete and homogeneous intermingling of the medium. The volume of the stirring jet is at least quintupled and especially decuplicated compared to the jet of the propellant medium. By a serial connection of two jet nozzles in the jet apparatus an additional multiplication of the volume of the stirring jet is achieved in comparison with the volume of the jet of the propellant medium.

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The device according to the invention enables an advantageous operation of a container for the storage of a medium. In such a container, an extraction pump and / or a dosing pump is usually present. The extraction pump can be used as a circulation pump to circulate the medium. The dosing pump is used for a downstream mixer in an asphalt mixing installation. Due to the independent operation of the extraction pump as a circulation pump and the dosing pump, a mixture of types in the bitumen ducts of the asphalt mixing installation is discarded. It is also conceivable to use only the extraction pump or only the dosing pump, then taking advantage of the pump used both to circulate and to dose. This can reduce the number of components required for the operation of the container. Especially, it is possible to create the device according to the invention by retrofitting an existing device with the jet apparatus. Such retrofitting is possible quickly and without complications. A retrofitting of an existing device to give rise to the device according to the invention for the storage of viscous media is economically possible. As a viscous medium within the meaning of this application, a medium to high viscosity liquid is applied whose dynamic viscosity amounts to more than 100 mPas and less than 10,000 mPas. This is the case, for example, of polymer bitumen, polymer emulsion and cooking oil.

For statistical reasons, it is generally not possible to retrofit an existing vessel with a mechanical stirrer. Especially, in an existing distribution installation, at least one filling pump and one dosing pump are generally provided. These pumps can be used as an extraction pump for the extraction of at least a partial volume of the medium for the generation of the stirring jet.

The jet apparatus has a first jet nozzle and a second jet nozzle that are arranged one behind the other along the longitudinal axis of the jet apparatus. The first jet nozzle is thus preconnected to the second jet nozzle along the direction of flow of the medium in the jet apparatus. The first jet nozzle has a first section of propulsion nozzles, a first section of aspiration nozzles, a first section of mixing nozzles and a first diffuser. The second jet nozzle has a second section of propulsion nozzles, a second section of suction nozzles, a second section of mixing nozzles and a second diffuser. A cascade connection of this type of two jet nozzles in the same jet apparatus enables the generation of a particularly efficient stirring jet. In this regard, it is taken advantage of that the agitator jet of the first jet nozzle can be used as a jet of a propellant means for the second jet nozzle. It is especially advantageous if the first diffuser and the second section of propulsion nozzles are an integral structural component, especially in one piece. Especially, the first diffuser and the second section of propulsion nozzles are the same component, thus, identical. This reduces the number of components for the jet apparatus. Especially, such a jet apparatus is made especially compact and robust. The constructive size of the jet apparatus is reduced. Especially, the constructive length along the longitudinal axis of the jet apparatus is reduced. The maximum volume increase attainable for the agitator jet is multiplied by the serial connection of two jet nozzles in the jet apparatus. Especially, the volume of the agitator jet amounts to ten times compared to the volume of the jet of propellant medium. It is possible to integrate an additional jet nozzle, thus, a third one, into the jet apparatus to cause an additional volume increase of the agitator jet.

According to an advantageous configuration, the jet apparatus has an inlet opening of the propellant means connected to the extraction pump for the supply of the propellant medium as a jet of the propellant medium to the jet apparatus and an outlet opening of the agitation medium for the emission of the agitator jet to the vessel. The inlet opening of the propellant means and the outlet opening of the stirring means are arranged coaxially with one another and especially coaxially with respect to a longitudinal axis of the jet apparatus. The jet apparatus is realized in a compact and robust way. Especially, the jet apparatus is made with small dimensions and can thus be particularly advantageously integrated in the container and advantageously arranged there. The inlet opening of the propellant means has a cross-sectional area of the propellant means oriented perpendicularly to the longitudinal axis of the jet apparatus. The outlet opening of the stirring means has a cross-sectional surface of the stirring means oriented perpendicularly to the longitudinal axis of the jet apparatus. Especially, the cross-sectional area of the propellant medium is smaller than the cross-sectional area of the stirring medium. Especially, the cross-sectional surface of the stirring medium amounts to at least 1.5 times the cross-sectional surface of the propellant medium, especially at least twice and especially at least three times.

According to an additional advantageous configuration, the jet apparatus has at least one inlet opening of suction means for aspiration of suction means in the jet apparatus. With this, it is possible to especially advantageously improve a mixture of the medium in the container. The inlet opening of the suction means is attached especially directly to the medium in the container. This means that the inlet opening of the suction means is facing the means surrounding the jet apparatus. Especially, the inlet opening of the suction means is provided in an outer wall of the jet apparatus. The inlet opening of the suction means extends especially along a perimeter around the longitudinal axis of the jet apparatus on an outer lateral surface of the jet apparatus. Especially, several inlet openings of the suction means are provided, for example, along an outer perimeter of the jet apparatus to improve the aspiration of the suction means and, with this, the mixing of the medium.

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According to a further configuration, the jet apparatus has a section of propulsion nozzles for the feeding of propellant means to the jet apparatus, a section of aspiration nozzles for the aspiration of aspiration means in the jet apparatus, a section of mixing nozzles for mixing propellant medium and aspiration medium and a diffuser for spilling the agitator jet into the vessel. Along a longitudinal axis of the jet apparatus, the propulsion nozzle section, the mixing nozzle section and the diffuser are arranged one behind the other in the opening of the propellant means. In the case of an embodiment of such a jet apparatus, the flow conditions and the mixing of the medium in the container are improved altogether. The diffuser especially generates a negative pressure in the suction area, especially in the mixing chamber, so that the suction capacity of the mixing chamber is further improved.

According to a particularly advantageous configuration, an inclined key is provided for the generation of a cross section of flow of propulsion nozzles in the propulsion nozzle section. The cross section of the flow of propulsion nozzles is especially made annularly and thereby causes increased flow rates in an outer perimeter of the cross section of flow of propulsion nozzles. This especially improves a mixture with the aspiration medium. Especially, the inclined key is arranged coaxially with respect to the longitudinal axis of the jet apparatus. The inclined key especially has a rotationally symmetrical geometry, especially a cone-shaped or truncated cone geometry. Especially, the inclined key has a variable cross-sectional surface along the longitudinal axis of the jet apparatus which increases directed from the opening of the propellant means towards the outlet of the agitation means.

It is especially advantageous if the section of mixing nozzles has a mixing chamber and a mixing section downstream along the longitudinal axis of the jet apparatus, decreasing a cross section of flow of mixing chamber along the longitudinal axis of the jet apparatus towards the outlet opening of the stirring medium and a cross section of the flow of the mixing section along the longitudinal axis of the jet apparatus being fundamentally constant. This ensures that, within the mixing nozzle section through the mixing chamber in front, due to the cross-sectional flow of decreasing mixing chamber, an aspiration effect is exerted on the propellant medium and on the suction medium previously aspirated through the intake openings of the suction medium. Next, the media streams supplied through the mixing chamber of the mixing section are mixed together within the mixing section and transmitted to the diffuser.

According to an additional advantageous configuration, the ratio of the cross section of the flow of the mixing section with respect to the cross section of the flow of the propulsion nozzles is in the range of 4 to 15, especially 6 to 12 and especially amounts to approximately 9. A relationship of this type enables a particularly advantageous flare of the agitator jet compared to the propellant jet.

According to an additional advantageous configuration, the diffuser has a cross section of diffuser flow that is flared. This means that the cross section of diffuser flow increases along the longitudinal axis of the jet apparatus towards the outlet opening of stirring medium. Especially, the cross section of diffuser flow is made in the form of a cone or in the form of a truncated cone. It is also possible that the cross section of diffuser flow is not a solid cross section but a hollow cross section, especially when an inclined key is provided in the area of the diffuser.

It is especially advantageous if a diffuser length is fixed depending on a radius of a diffuser inlet opening. Especially, the length of diffuser oriented along the longitudinal axis of the jet apparatus amounts to at least 80% and at most 230% of the radius, especially at least 100% and at most 200% of the radius and especially the length diffuser is 1.6 times the radius of the diffuser inlet opening.

According to an additional advantageous configuration, the jet apparatus has no moving part. Especially in comparison with mechanical agitators, the device is simplified so that moving and mechanical parts are suppressed. The wear of the entire device and the precise cost for maintenance and / or repair work are reduced. Due to maintenance work that is suppressed, the risk of accident is also reduced. Especially, it is not necessary to place stairs outside the container through which accessibility for the maintenance of agitators in the container is made possible. As drive shafts that pass through the vessel are not precise, the loss of energy during the intermingling of the medium in the vessel is reduced. In the case of a usual temperature difference of approximately 150 K between the stored medium and the environment, heat loss in a stirrer through a flashlight flange cannot be avoided. A heat loss of this type does not appear in the device according to the invention. Especially, the heat loss that appears in the agitators is greater than a driving power of the extraction pump in the device according to the invention, especially during short stirring intervals and / or long periods of rest, as is usual especially in the case of polymer bitumen storage. This means that, in spite of the additional drive power for the extraction pump, the device according to the invention has a reduced energy consumption compared to a storage container with

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mechanical stirrer The balance of Jan ^ a is positive. Especially in the case of media containing solvent, the storage temperature may be above the flash point of the respective medium. The risk of a formation of sparks, which is possible in the case of mechanical agitators due to friction of the bearing or breakage of the material, is ruled out in the present device. The mixing of media with the device according to the invention is carried out in such a way that the surface of the medium is mostly smooth regardless of the level of filling in the container. This reduces the contact of the medium with displacement air. The risk of oxidation is decreased. The risk of oxidation is reduced especially in comparison with mechanical agitators that, for example, operate on the surface of the medium and cause a surge. Especially, the inertization of the displacement air and / or the shock-resistant design of the vessel is not necessary. The device according to the invention, especially the jet nozzle and the precise connection ducts therefor, can be advantageously arranged especially in a lower area of the container which is positioned in a particularly vertically oriented manner. Especially, no additional component is provided in the upper area of the container. Internal and upper structures can be suppressed for the repair of the upper area of the vessel, such as an access hole, internal and external stairs, a round platform and / or a flashlight flange. The realization of such a container is simplified and is especially economical. Apart from this, the device according to the invention enables an advantageous and energy efficient operation of the storage and intermingling of the medium. Through the jet nozzle it is possible to intermingle and especially heating the medium stored in the container even when not all the volume of the medium is present in liquid form. A mixture can start locally in the area of the jet apparatus and give rise, through a heat supply, to an improved heat input in the area of the jet nozzle. This advantageously takes advantage of the heating capacity. The heat exchange is improved by mixing through the jet apparatus. Especially, it is not necessary to start a mixture only when the stored medium is completely present in liquid form, as would be necessary in the case of a mechanical stirrer. The jet apparatus does not need maintenance. Especially, the entire device does not fundamentally need maintenance, requiring only the extraction pump in case of maintenance, but the extraction pump being arranged especially outside the container and being especially accessible from outside. Especially when the fluid to be stored is made without abrasive components, the life of the jet apparatus is fundamentally unlimited. It has been shown that gear pumps and rotary vane pumps are constructive forms especially suitable for the realization of the extraction pump. In particular, this allows an increase in the useful life of the extraction pump. Gear pumps and rotary vane pumps can, for example, have an efficiency rating of 70% and enable the generation of a jet of medium propellant with a volume flow of 40 m3 / h at a pressure of 3 bars. From an actuation power of approximately 5 kW, they can be mixed reliably and homogeneously, therefore, approximately 50 to 100 m3 of the medium in the container.

According to an advantageous configuration, the jet apparatus is oriented with the longitudinal axis of the jet apparatus parallel to a longitudinal axis of the container. This improves the mixing of the medium in the container. Especially, the container with the longitudinal axis of the container is positioned vertically oriented with respect to the bottom.

It is especially advantageous if several jet apparatus are arranged in the container. This further improves the intermingling. It is possible to arrange several jet apparatus in a plane perpendicular to the longitudinal axis of the container, especially along an interior wall of the container. It is also conceivable to arrange several other jet apparatus along the longitudinal axis of the container.

Other advantageous configurations, additional features and details of the invention are deduced from the following description of an embodiment by drawing. They show:

Fig. 1 a schematic representation of the device according to the invention and

Fig. 2 an enlarged sectional representation of a device's choro apparatus according to the

invention.

The device 1 schematically represented in Fig. 1 serves for the storage of viscous media, especially medium to high viscosity media such as polymer bitumen. The device 1 comprises a container 2 in which the medium 3 is stored. Through a filling connector 4 the medium 3 can be supplied to a supply conduit 5. An extraction pump 6 extracts the medium 3 that is in the supply line 5 to the container 2. A first actionable shut-off valve 7 serves to separate the filling connector 4 from the supply line 5, especially when precisely no refilling of the container 2 is necessary.

An additional second shut-off valve 9 is arranged along an extraction direction 8 of the fill pump 6. Behind the second shut-off valve 9, a temperature regulator 10 is provided which serves to measure the temperature of the medium. 3 which is in the supply duct 5. In addition, a sampling point 11 is provided to take a sample of the medium 3 in the delivery duct 5. A test of this type can then be subjected to further investigation. . An investigation of this type serves to

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the analysis, for example, of the composition of the medium. The supply conduit 5 leads along the extraction direction 8 from the extraction pump 6 to the container 2. Within the container 2, a first jet apparatus 12 and a second jet apparatus 13 are arranged and connected in each case independently each other to the supply conduit 5. For this, the supply conduit 5 has a first deflection 14 which is arranged especially outside the container 2. A third shut-off valve 15 is arranged along the extraction direction 8 before the first deviation 14. With the third shut-off valve 15, the extraction connection of the extraction pump 6 to the two jet apparatus 12, 13 can be interrupted. Provided that the third shut-off valve 15 allows an extraction of the means 3, at least the first jet apparatus 12 is in extraction connection with the extraction pump 6. The second jet apparatus 13 can be connected individually through a fourth shut-off valve re 16 which is subordinate along the extraction direction 8 of the first deviation 14. Thus, it is possible that either the two jet apparatus 12, 13, only the first jet apparatus 12 or none of the apparatus of jet 12, 13 make an extraction connection with the extraction pump 6.

The container 2 has a longitudinal axis of the container 17. The container 2 is positioned vertically oriented with the longitudinal axis of the container 17. The first jet apparatus 12 has a longitudinal axis of the jet apparatus 18 that is oriented vertically. The second jet apparatus 13 has a longitudinal axis of the jet apparatus 19 which is oriented vertically. The longitudinal axis of the container 17 and the longitudinal axes of the jet apparatus 18, 19 are oriented parallel to each other. Along the longitudinal axis of the container 17, the first jet apparatus 12 is arranged before the second jet apparatus 13.

According to the exemplary embodiment shown in Fig. 1, the level of filling of the medium 3 is such that the first jet apparatus 12 is surrounded by means 3. The second jet apparatus 13 is arranged in an area raised from the container 2 that is above the filling level. In this arrangement, the second jet apparatus 13 is inactive, that is, the second jet apparatus 13 does not serve to pump the medium 3. The medium 3 is circulated exclusively through the first jet apparatus 12.

In the container 2 a filling level sensor 49 is provided that serves to monitor the current level of filling of medium 3 in the container 2. Depending on the filling level, the filling level sensor 49 can transmit a signal to a control unit 50 which then controls, for example, the extraction pump 6 and / or at least one of the shut-off valves 15, 16 for supplying the jet apparatus 12, 13. For this, the control unit 50 it is in signal connection with the extraction pump 6 and the shut-off valves 15, 16. The control unit 50 is also in signal connection with the filling level sensor 49.

According to the state shown in Fig. 1, the fourth shut-off valve 16 is connected such that the second jet apparatus 13 is separated from the supply line 5. On the contrary, the first jet apparatus 12 is in extraction connection with the extraction pump 6. The control unit 50 can also cause the first shut-off valve 7 to open and recharge medium 3 to the container 2 through the filling connector 4 and the supply line 5. It turns out It is especially conceivable that the supervision of the filling level is carried out in a regulated manner such that it does not fall below a predetermined minimum filling level in the container 2. This is possible, for example, because the regulation for the refilling of the container 2 with medium 3 it is caused when reaching and / or descending from a critical minirno filling level.

In addition, a flow sensor 51 is provided in the container 2. The flow sensor 51 is stationary placed in the container 2 and, for example, is fixedly connected to an inner wall of the container 2, especially fixed by welding to this. The flow sensor 51 is disposed adjacent to the first jet apparatus 12 along the longitudinal axis of the jet apparatus 18. The flow sensor 51 detects the flow of the medium 3 inside the container 2. The flow sensor 51 may also be disposed elsewhere in the container 2 to detect the flow conditions inside the container 2. The flow sensor 51 is in signal connection with the control unit 50. The flow sensor 51 transmits a signal to the control unit 50 which is used for the control and especially for the regulation of the number of revolutions of the extraction pump 6. For this, a frequency converter 52 can be provided along the signal connection between the control unit 50 and the pump of extraction 6. In the driving power of the extraction pump 6, the number of revolutions of the extraction pump 6 decreases with the third power. A reduction in the number of revolutions of the extraction pump 6 causes considerable savings in the operating power of the extraction pump 6. By means of the flow sensor 51 it is possible to operate the device 1 in an especially efficient and economical way.

In addition, in connection with the supply line 5, there is a supply connector 20 through which the medium 3 can be pumped directly to the container 2. A fifth shut-off valve 21 is assigned to the supply connector 20. supply connector 20 with means 3, a second deviation 22 is provided in the supply line 5 which is located in front of the third shut-off valve 15 along the extraction direction 8. Thus, it is especially possible to extract means 3 by the extraction pump 6 through the supply connector 20 directly to the container 2 without the medium 3 having to flow additionally through at least one of the jet apparatus 12, 13. This allows fast, direct and simple filling of the container .

In the receptacle 2, a tap opening 23 is provided to which a sixth shut-off valve 24 is assigned. From the tap opening 23 it can be returned by pumping medium 3 out of the bowl 2 along the direction of

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extraction 8 and return to circulation through the extraction pump 6. For a mixture of the medium 3 in the container 2, it is thus possible to extract the medium 3 that is in the container 2 through the intake opening 23 in an intake duct 25. The intake duct 25 is assigned in the area of the extraction pump 6 to the supply conduit 5, so that the means taken can be supplied through the extraction pump to the supply conduit 5 along the extraction direction 8 of the first jet apparatus 12 and / or the second jet apparatus 13. From the container 2, the intake opening 23, the intake conduit 25, the extraction pump 6 A closed circuit for the circulation of the medium is formed from the supply duct 5 and the jet apparatus 12, 13.

Next, the concrete configuration of the first jet apparatus 12 which is represented purely schematically in Fig. 1 is explained in more detail by means of Fig. 2. The jet apparatus 12, 13 are identically made.

The first jet apparatus 12 is made rotationally symmetrically with respect to the longitudinal axis of the jet apparatus 18. Fig. 2 shows a longitudinal section in a plane containing the longitudinal axis of the jet apparatus 18. The jet apparatus 12 it has an inlet opening of propellant means 26 shown on the left in Fig. 2 which serves to supply the medium 3 as a propellant means in the form of a jet of propellant medium in the jet apparatus 12. At an opposite end of the inlet opening of the propellant means 26 of the jet apparatus 12 is provided an outlet opening of the stirring means 27 to emit an agitator jet to the vessel. The stirring jet serves to stir the medium 3.

According to the embodiment shown, the jet apparatus 12 comprises a first jet nozzle 28 and a second jet nozzle 29 arranged behind the longitudinal axis of the jet apparatus 18. The first jet nozzle 28 comprises a first section of propulsion nozzles 30, a first section of aspiration nozzles 53, a first section of mixing nozzles 31 and a first diffuser 32. The second jet nozzle 29 comprises a second section of propulsion nozzles 33, a second section of suction nozzles 54, a second section of mixing nozzles 34 and a second diffuser 35. The respective sections of propulsion nozzles 30, 33, sections of suction nozzles 53, 54, sections of mixing nozzles 31,34 and diffusers 32, 35 of the jet nozzles 28, 29 are fundamentally identical from the functional point of view. It is essential that along the longitudinal axis of the jet apparatus 18, along a medium flow direction 36, the propulsion nozzle section 30, 33, the section of the propulsion nozzles 30, 33 and the section of suction nozzles 53, 54, the mixing nozzle section 31,34 and then the diffuser 32, 35.

The section of propulsion nozzles 30, 33 serves for the feeding of propellant means 3 to the respective jet nozzles 28, 29. In the case of the first section of propulsion nozzles 30, which is oriented to the opening of the inlet of the medium. propeller 26, the propellant means supplying the jet apparatus 12 through the supply line 5. In the case of the second section of propulsion nozzles 33, which is identical to the first diffuser 32, is used as the propellant means for the second nozzle of jet 29 the jet of the propellant means that comes out in the first diffuser 32 of the first jet nozzle 28.

In the area of the first section of propulsion nozzles 30, 33 there is arranged a key inclined 37 coaxially with respect to the longitudinal axis of the jet apparatus 18, which flows around through the entering propellant means. The inclined key 37 serves for the generation of a cross-sectional flow of annular propulsion nozzles. Such a cross-section of the flow of generated propulsion nozzles has an increased flow rate especially in a peripheral area of the annular surface oriented perpendicularly with respect to the longitudinal axis of the jet apparatus 18, so that a mixture with a suction means is improved sucked into the jet apparatus 12.

An aspiration of suction means is carried out through several inlet openings of suction means 38 that are arranged in the outer wall of the jet apparatus 12. With the example of embodiment shown, four inlet openings of suction means are provided 38 which are provided evenly distributed on the outer perimeter of the jet apparatus 12. The intake openings of suction means 38 are respectively separated by separating souls 55 not shown in the outer wall of the jet apparatus 12. The openings of suction means inlet 38 extend along a peripheral angle around the longitudinal axis of the jet apparatus 18 about almost 90 °. An inlet surface formed by the intake openings of suction means 38 for the suction means essentially corresponds to the outer surface of the jet apparatus. The suction means inlet openings 38 are arranged in the suction nozzle section 53. The flow of the suction means 3 through the suction means inlet openings 38 in the first section of mixing nozzles 31 is represented by the arrow 39.

The first section of mixing nozzles 31 serves for mixing propellant medium and aspiration medium. It is clear that, in the case of the propellant medium and the aspiration medium, it is the same medium 3, especially polymer bitumen. The propellant means is supplied by the flow of propellant means 40 through the inlet opening of the propellant means 26 of the first jet nozzle 28. The suction means is supplied through the inlet openings of suction means 38 as aspiration flow 39.

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The first section of mixing nozzles 31 has a first mixing chamber 41 and a first mixing section 42 downstream along the medium flow direction 36. The first mixing chamber 41 has a cross section of mixing chamber flow that decreases oriented along the direction of flow of medium 36, thus, along the longitudinal axis of the jet apparatus 18 towards the outlet opening of stirring means 27. This increases the flow rate of the medium and improves a mixture of propellant medium and aspiration medium. The mixing of the medium flows 39, 40 is then carried out especially in the first mixing section 42 which has a cross section of the mixing section flow along the longitudinal axis of the jet apparatus 18, which is essentially constant.

A cross-sectional ratio of mixing section flow to cross-sectional flow of propulsion nozzles is in the range of 4 to 15. It is advantageous if this ratio is in the range of 6 to 12. According to the realization example shown, the ratio amounts to approximately 9.

The first diffuser 32 has a cross section of diffuser flow that is flared, which has along the longitudinal axis of the jet apparatus 18 an outer contour in the form of a cone or in the form of a truncated cone. According to the embodiment shown, an additional inclined key 43 is provided in the area of the first diffuser 32. The inclined key 43 essentially fulfills the same function as the inclined key 37 in the area of the first section of propulsion nozzles 30. The reason for this is that the first diffuser 32 is made integrally in the same component as the second section of propulsion nozzles. The construction length of the jet apparatus 12 can be reduced as a whole. Due to the inclined key 43, the cross-section of diffuser flow of the first diffuser 32 is an annular jet. The medium flow leaving the area of the first diffuser 32 serves as a propellant flow 40 for the second jet nozzle 29.

The second jet nozzle 29 is essentially made identically to the first jet nozzle 28. Especially, the dimensions, especially the respective diameter of the transverse surfaces perpendicular to the longitudinal axis of the jet apparatus 18 as well as the lengths along of the longitudinal axis of the jet apparatus 18, are increased in comparison with the corresponding measures of the first jet nozzle 28. The second section of aspiration nozzles 54 has four inlet openings of aspiration means 44 arranged regularly distributed along the outer perimeter of the jet apparatus 12. The second section of mixing nozzles 34 has a second mixing chamber 45 and a second mixing section 46. Two adjacent suction means inlet openings 44 are separated from each other respectively by a separating core 56 Through the second diffuser the jet apparatus 12 is emitted on m edio 3 as a stirring jet 48 for stirring the medium 3 in the container 2.

No inclined key is provided in the area of the second diffuser 35. This means that the stirring jet 48 emitted by the jet apparatus 12 has a flow profile over the entire surface. The cross section of diffuser flow emitted in the second diffuser 35 is all over the surface. When the diffuser 35 is carried out flared along the longitudinal axis of the jet apparatus 18 and especially has a truncated cone shape, the agitator jet 48 is flared. Especially, the stirring jet 48 emitted from the jet apparatus 12 is increased with respect to the jet of propellant medium 40 supplied to the jet apparatus 12. This means that the stirrer jet 48 has an increased volume and simultaneously causes a prolonged loss of momentum due to at reduced flow rate. The agitator jet 48 thus generated is especially suitable for mixing in a complete, homogeneous and reliable way the medium 3 in the container 2. By the cascade connection shown of the jet nozzles 28, 29 the cross section of the flow of flared diffuser can be used advantageously as an inlet flow for the second jet nozzle 29. Especially, it is sufficient if a single jet apparatus 12 is arranged in a container 2. By not presenting the jet apparatus 12 any moving part, wear is reduced. Especially, the jet apparatus 12 is made so that it does not need maintenance.

The second diffuser 35 has a diffuser length Ld that is oriented along the longitudinal axis of the jet apparatus 18. The second diffuser 35 also has a radius ri of the diffuser inlet opening 47. It is applied: 0.8ri < Ld <2.3ri, especially 1.0ri <Ld <2.0ri, especially Ld = 1.6ri.

It is conceivable to provide in the jet apparatus 12 the supply of a refrigerant, especially liquid water. Especially, the refrigerant is supplied in the area of the outlet of the stirring medium 27. Especially, a small quantity is supplied, especially at most 5% of the volume of the emitted jet 48, especially at most 3% of the volume of the stirring jet 48 emitted and especially at most 1% of the volume of the stirring jet 48 emitted. The injected water evaporates due to the increased temperature of the medium, especially the polymer bitumen. The temperature of the medium 3 is reduced due to the enthalpy of phase change. Simultaneously, the impulse of the stirring jet 48 is increased. This further improves the mixing effect of the stirring jet 48. A stirring jet 48 of this type with injected water has improved efficiency. Especially, it is possible to supply the liquid water through a supply conduit not shown to the jet apparatus 12 in the area of the second diffuser 35 on an external lateral surface radially with respect to the longitudinal axis of the jet apparatus 18. It is also conceivable to integrate the supply conduit in the jet apparatus 12 such that a supply opening for the water is coaxially disposed with respect to the longitudinal axis of the jet apparatus 18. Several can also be provided

supply openings which then, for example, are concentrically arranged with respect to the longitudinal axis of the jet apparatus 18 in a plane perpendicularly with respect to the longitudinal axis of the jet apparatus 18 spaced apart from the longitudinal axis of the jet apparatus 18.

Claims (13)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 1. Device for storing viscous media, comprising the device (1) to. a container (2) for storage of the medium (3), b. an extraction pump (6) for the extraction of at least a partial volume of the medium (3), C. a jet apparatus (12, 13) having at least one jet nozzle (28, 29), disposed in the container (2), which is in extraction connection with the extraction pump (6), which enables a jet agitator (48) for agitation of the medium (3), the agitator jet (48) to be emitted from the jet apparatus (12, 13) being flared with respect to a jet of propellant medium to be supplied to the apparatus of jet (12, 13) and, therefore, presenting an increased volume and / or causing a reduced impulse loss of the medium (3) to be agitated for an intermingling of the medium in laminar flow conditions, characterized in that the jet apparatus (12, 13) has a first jet nozzle (28) comprising a first section of propulsion nozzles (30), a first section of aspiration nozzles (53), a first section of nozzles mixers (31) and a first diffuser (32) as well as a second jet nozzle (29) arranged behind the longitudinal axis of the jet apparatus (18, 19), which comprises a second section of propulsion nozzles (33 ), a second section of suction nozzles (54), a second section of mixing nozzles (34) and a second diffuser (35). 2. Device according to claim 1, characterized in that the jet apparatus (12, 13) has an inlet opening of propellant means (26) connected to the extraction pump (6) for the supply of propellant medium as a medium jet propeller to the jet apparatus (12, 13) and an outlet opening of stirring medium (27) for the emission of the stirring jet (48) to the container (2), the inlet opening of the propellant means being coaxially arranged between them ( 26) and the outlet opening of stirring medium (27). Device according to one of the preceding claims, characterized in that the jet apparatus (12, 13) has at least one inlet opening of suction means (38, 44) for aspiration of suction means in the jet apparatus (12, 13). Device according to one of the preceding claims, characterized along a longitudinal axis of the jet apparatus (18, 19) of the jet apparatus (12, 13) by a section of propulsion nozzles (30, 33) for the supply of propellant means to the jet apparatus (12, 13), a section of aspiration nozzles (53, 54) for aspiration of aspiration means in the jet apparatus (12, 13), a section of mixing nozzles (31 , 34) for mixing propellant medium and aspiration medium and a diffuser (32, 35) for spilling the stirring jet (48) to the vessel (2). Device according to claim 4, characterized in that the section of propulsion nozzles (30, 33) has an inclined key (37, 43) arranged especially coaxially with respect to the longitudinal axis of the jet apparatus (18, 19) for the generation of a cross section of flow of the propulsion nozzles, especially annular. Device according to claims 4 or 5, characterized in that the section of mixing nozzles (31, 34) has a mixing chamber (41,45) and a mixing section (42, 46) downstream along the longitudinal axis of the jet apparatus (18, 19), decreasing a cross-sectional flow of the mixing chamber along the longitudinal axis of the jet apparatus (18, 19) towards the outlet opening of stirring medium (27) and being essentially constant a cross-sectional section of mixing section flow along the longitudinal axis of the jet apparatus (18, 19). 7. Device according to claims 5 and 6, characterized by a relation of the cross section of flow of the mixing section with respect to the cross section of flow of the propulsion nozzles in the range of 4 to 15, especially 6 to 12 and especially about 9. Device according to one of claims 4 to 7, characterized in that the diffuser (32, 35) has a cross section of the diffuser flow that is flaring along the longitudinal axis of the jet apparatus (18, 19), especially cone-shaped or truncated cone-shaped. Device according to one of claims 4 to 8, characterized in that the diffuser (32, 35) has a diffuser length (Ld), the following being applied: 0.8ri <Ld <2.3ri, especially 1.0ri < Ld <2.0ri, especially Ld = 1.6ri, where ri is the radius of a diffuser inlet opening (47). Device according to one of the preceding claims, characterized in that the jet apparatus (12, 13) does not comprise any moving part. Device according to one of the preceding claims, characterized in that the first diffuser (32) and the second section of propulsion nozzles (33) are an integral component. 12. Device according to one of the preceding claims, characterized in that the jet apparatus (12, 13) is oriented with the longitudinal axis of the jet apparatus (18, 19) parallel to a longitudinal axis of container (17) especially oriented of vertical way. 5 13. Device according to one of the preceding claims, characterized by several jet units (12, 13).