EP3790671B1 - Drive arrangement for a heat exchanger cleaning device - Google Patents
Drive arrangement for a heat exchanger cleaning device Download PDFInfo
- Publication number
- EP3790671B1 EP3790671B1 EP19722795.2A EP19722795A EP3790671B1 EP 3790671 B1 EP3790671 B1 EP 3790671B1 EP 19722795 A EP19722795 A EP 19722795A EP 3790671 B1 EP3790671 B1 EP 3790671B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- heat exchanger
- drive
- cylinder tube
- threaded spindle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004140 cleaning Methods 0.000 title claims description 53
- 230000008878 coupling Effects 0.000 claims description 21
- 238000010168 coupling process Methods 0.000 claims description 21
- 238000005859 coupling reaction Methods 0.000 claims description 21
- 238000001816 cooling Methods 0.000 description 21
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 239000002826 coolant Substances 0.000 description 9
- 239000012530 fluid Substances 0.000 description 9
- 239000003345 natural gas Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 8
- 239000003999 initiator Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000009429 electrical wiring Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
- F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/045—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes the cleaning devices being rotated while moved, e.g. flexible rotating shaft or "snake"
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/08—Non-rotary, e.g. reciprocated, appliances having scrapers, hammers, or cutters, e.g. rigidly mounted
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/14—Pull-through rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G15/04—Feeding and driving arrangements, e.g. power operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G15/08—Locating position of cleaning appliances within conduits
Definitions
- the invention relates to a drive device for a cleaning device for a heat exchanger, a cleaning device and a heat exchanger with such a drive device.
- the invention is thus particularly in the field of heat exchangers.
- Condensing and freezing accompanying substances such as water, CO 2 and hydrocarbon compounds are separated on the heat transfer surfaces and thus reduce the heat transfer.
- Methane hydrate can also form on the heat transfer surfaces even at operating temperatures above the freezing point of water.
- Cylinder tubes of heat exchangers can be provided, for example, with a cleaning device, by means of which deposits from the Heat transfer surfaces in the cylinder tubes are eliminated mechanically
- such a cleaning device has the disadvantage that electrical wiring must be provided for the drive element, which is typically designed as an electric motor. Since the electric motor together with the cleaning device often has to be accommodated in a pressure-tight environment with the interior of the cylinder tube, a pressure-tight power bushing is therefore typically necessary in order to be able to supply the drive element with electrical energy from an external energy source. This not only increases the manufacturing effort and thus the manufacturing costs, but also increases the maintenance effort and the risk of leaks in the heat exchanger system.
- the invention in a first aspect, relates to a drive device for a cleaning device for a cylinder tube of a heat exchanger.
- the driving device has a screw shaft, which is designed to be arranged in an axial direction coaxially with the cylinder tube of the heat exchanger in the cylinder tube and, by rotation, to displace a cleaning element in the cylinder tube along the axial direction.
- the drive device has a coupling element with a first rotor and a second rotor coupled to the first rotor, the first rotor being mechanically rigid with the threaded spindle and being connectable to the cylinder tube in a fluid-tight and/or pressure-tight manner, and the second rotor having a drive element is mechanically connectable in such a way that the threaded spindle can be rotated by the drive element via the second rotor and the first rotor.
- the invention relates to a cleaning device for a heat exchanger, comprising a drive device according to the invention and a cleaning element which can be attached to the threaded spindle in such a way that the cleaning element can be displaced in the axial direction through the cylinder tube by rotating the threaded spindle.
- the invention relates to a heat exchanger, comprising at least one cylinder tube, wherein the at least one cylinder tube is equipped with a cleaning device according to the invention, and at least one drive element, which is mechanically connected to the second rotor of the at least one cleaning device such that the second rotor can be driven by the drive element.
- first rotor can be connected to the cylinder tube in a fluid-tight and/or pressure-tight manner means that the first rotor can be connected to the cylinder tube in such a way that no fluid can penetrate between the first rotor and the cylinder tube and that no fluid can penetrate through the first rotor can escape from the cylinder barrel. If the first rotor is connected to the cylinder tube in a pressure-tight manner, no fluid can penetrate between the first rotor and the cylinder tube or through the first rotor, even if the fluid has a significant overpressure compared to the ambient pressure outside the cylinder tube and/or outside the first rotor , For example, an overpressure of 10 bar, 20 bar, 50 bar or 100 bar.
- threaded spindle is rotatable or can be rotated means that the threaded spindle is rotatable about its longitudinal axis, which extends in the axial direction.
- the invention offers the advantage that, by means of the coupling element, an efficient transmission of the drive force and/or a drive torque can be transmitted from the drive element to the threaded spindle and thus to the cleaning element without an interruption and/or passage through a delimitation or Shielding of a pressure area inside the cylinder barrel from an outside area outside Cylinder tube and / or outside of the first rotor is required.
- the preferably closed interior of the cylinder tube when it is connected to the first rotor, does not have to be made accessible in order to provide the driving force from the drive element to the first rotor. In this way, the manufacturing outlay for the drive device can be reduced, as a result of which the manufacturing costs can also be lowered.
- the invention also offers the advantage that passages through a boundary or housing or wall, for example for supply lines, are not required, since the drive element according to the invention is not necessarily arranged in a pressure area which is in fluid communication with the interior of the cylinder tube must. Rather, the drive element can be arranged outside of this pressure range, where, for example, an ambient pressure prevails, which can be significantly lower than the pressure prevailing in the pressure range in the interior of the cylinder tube. As a result, it is not absolutely necessary for the drive element to also be designed for operation under high pressure. Rather, commercially available drive elements, such as commercially available electric motors, can preferably be used, which are not necessarily suitable for operation under high pressure. As a result, the manufacturing costs can be further reduced.
- the invention offers the advantage that the risk of leaks can be reduced since bushings which are conventionally required for connecting an energy supply to a drive element arranged in the pressure area can be dispensed with. As a result, on the one hand the maintenance effort can be reduced and on the other hand a susceptibility to errors or downtimes of the heat exchanger can be reduced.
- the second rotor is preferably separated from the first rotor in a fluid-tight and/or pressure-tight manner.
- the first rotor and the second rotor are coupled to one another in such a way that there is no fluidic connection between the two.
- This offers the advantage that even then no fluid can penetrate to a coupling point between the first and the second rotor if a higher or lower pressure prevails at the position of the first rotor than at the position of the second rotor.
- the first rotor and the second rotor are particularly preferred separated from each other in a fluid-tight manner, so that even with a large pressure difference, no fluid can penetrate from the first rotor to the second rotor, or vice versa.
- This makes it possible, for example, for the first rotor to be arranged in the pressure area which is in fluid communication with the interior of the cylinder tube, while the second rotor is arranged outside, for example at ambient pressure, or vice versa.
- the coupling element preferably has a magnetic coupling or is designed as such. This enables efficient coupling by means of magnetic forces, so that a mechanical connection between the first and the second rotor is not necessarily required for power transmission. This is particularly advantageous in that it enables a simple and/or efficient fluid-tight and/or pressure-tight delimitation between the first and the second rotor.
- the coupling element particularly preferably has a containment shell which delimits the first rotor and the second rotor from one another in a fluid-tight and/or pressure-tight manner.
- the first rotor can be arranged inside the containment shell, preferably on a side of the clutch unit that faces the cylinder tube and/or the threaded rod, while the second rotor is arranged outside of the containment shell, preferably on a side that faces away from the cylinder tube and/or the threaded rod clutch unit.
- the first rotor and the second rotor can preferably be magnetically coupled through the containment shell.
- the coupling element is preferably designed in such a way that a torque applied to the second rotor by the drive element can be at least partially transmitted to the first rotor.
- the first rotor can be at least partially driven by driving the second rotor.
- the transmission of the driving force acting by the driving element on the second rotor or the driving torque to the first rotor can be subject to slip.
- a heat exchanger preferably has a plurality of cylinder tubes, each with a cleaning device.
- a heat exchanger particularly preferably has a plurality of drive elements.
- each cylinder tube of a heat exchanger can have its own cleaning device and preferably its own drive element connected thereto. Alternatively, several cleaning devices can be driven via a drive unit.
- the heat exchanger preferably includes a control unit which is set up to determine a position of the at least one cleaning element along the at least one threaded spindle and/or along the at least one cylinder tube in the axial direction and/or to control the at least one drive element in this way and/or to regulate that the at least one cleaning element assumes a predetermined position and/or executes a predetermined movement in the axial direction.
- the control unit can, for example, be integrated into the drive unit and/or the drive element and/or the cleaning device or be connected to it.
- Each cleaning device and/or each drive element can preferably be regulated and/or controlled via its own control unit, or a control unit can be designed to control and/or regulate a number of cleaning devices and/or drive elements.
- figure 1 shows schematically a longitudinal section through an embodiment of a heat exchanger.
- figure 2 shows a functional principle of a control for a drive device in a schematic representation.
- FIG 1 shows schematically a longitudinal section through an embodiment of a heat exchanger 13, as it can be used in particular for cooling natural gas.
- the heat exchanger 13 has an outer cylinder tube 1 which surrounds a cylinder tube which is designed as a cooling coil 2 .
- This cooling coil 2 has at least one, preferably spiral-shaped, channel 23 on its outer surface, which serves to guide a coolant.
- This channel 23 is created by a corresponding coil 21 on the outer surface of the cooling coil 2 .
- the inner surface of the hollow-cylindrical cooling coil 2 has guide or profile grooves (not shown), which are used to guide a cleaning element 12, which is also referred to as a scraper.
- the cleaning element 12 can be designed as an ice scraper.
- the heat exchanger 13 has a cleaning device 10 which has a threaded spindle 3 located inside the cooling coil 2 and running in an axial direction 100 .
- the threaded spindle 3 is driven via a first rotor 32 which is designed as an internal rotor and is mounted in a bearing point which is preferably designed as an axial/radial mixed bearing 5 .
- a first rotor 32 which is designed as an internal rotor and is mounted in a bearing point which is preferably designed as an axial/radial mixed bearing 5 .
- a radial bearing point which is preferably designed as a plain bearing bush.
- a thermally decoupled condensate reservoir and a heating element for heating condensate in the condensate reservoir can also be present at the other end of the heat exchanger 13 in order to melt and discharge the condensate conveyed there by the cleaning element 12 .
- the first rotor 32 is designed as an inner rotor as part of a clutch element 30, which also includes a second rotor 34, or is designed as an outer rotor.
- the coupling element 30 is designed as a magnetic coupling, so that the first rotor 32 and the second rotor 34 are separated from one another by a containment shell 36 and are coupled to one another via a magnetic force provided by the magnetic elements 38 .
- This enables the rotor to be in fluid communication with the interior 2a of the cooling coil 2, while the second rotor 34 is arranged separately therefrom and can be exposed to an ambient pressure, for example.
- the first rotor 32 another Be exposed to pressure than the second rotor 32.
- the containment shell is designed in such a way that it can withstand a pressure difference between the interior 2a and the environment outside the cooling coil 2 or the second rotor 34 and that the first rotor 32 and the second rotor 34 can couple through the containment shell 36 via the magnetic elements 38 .
- the second rotor 34 can be driven by a drive element (not shown) arranged outside of the heat exchanger 13 or the cooling coil 2, the driving force being transmitted at least partially via the magnetic coupling to the first rotor 32 in order to rotate the threaded rod 3 and thereby to move the cleaning element 12.
- Rotating the second rotor 34 thus causes the threaded spindle 3 to rotate, so that the cleaning element 12 on the threaded spindle 3 is displaced in the axial direction along the cooling coil 2 .
- a threaded spindle 3 is used, for example with a trapezoidal profile. A reversal of the direction of movement of the raker 12 requires a reversal of the direction of rotation of the threaded spindle 3 .
- moist, contaminated working medium for example, is fed via a working medium inlet opening 14 on both sides into the space between the threaded spindle 3 and between the cooling coil 2 or into the interior of the cylinder tube and flows in the axial direction 100 to the working medium outlet opening (not shown ) at the other end of the heat exchanger 13.
- the working medium flows on the inner surface of the hollow-cylindrical cooling coil 2 along the axial direction 100.
- Coolant is supplied to the space between the cooling coil 2 and the outer cylinder tube 1 via a coolant inlet opening 16 on both sides, which coolant flows to the other end of the heat exchanger 13 flows and this through the coolant outlet opening (not shown) leaves.
- the coolant flows spirally in the axial direction in the channel 23 formed between the outer cylinder tube 1 and the cooling coil 2 .
- the coolant extracts heat from the cooling coil 2, so that heat is in turn extracted from the working medium.
- nitrogen can be used as an accompanying substance at high pressure (e.g. at 10 bar) by liquid nitrogen at low pressure (e.g. at 1 bar), caused by the different pressure-dependent phase transitions, are liquefied and separated.
- the heat exchanger 13 proposed here can thus also be used for the liquefaction of nitrogen.
- the threaded spindle 3 is rotated by a drive element via the coupling element.
- the cleaning element 12, which engages in the thread of the threaded spindle 3, is thereby set in a translational movement in the axial direction.
- the cleaning element 12 takes the condensed accompanying substances mentioned with it. When they reach the condensate reservoir at the other end of the heat exchanger, these are pushed into the same.
- heat exchanger 13 explained here can be adapted and used not only for natural gas liquefaction, but also for a large number of industrial applications with corresponding working media.
- the cleaning device 10 and/or the cleaning element 12 can be adapted to the needs of the respective areas of use as less complex replacement parts and can be quickly replaced in the event of damage.
- FIG 2 shows a schematic representation of a functional principle of a controller 200 for a drive device or a cleaning device 10 or a heat exchanger 13.
- a control unit is provided which can have, for example, a drive controller 202, which can be connected to a computing unit 204 in terms of communication and /or can be integrated with the computing unit 204 in the control unit.
- the drive controller 202 is supplied with electrical energy or voltage by an energy supply or voltage supply 206 .
- the voltage supply 206 is preferably designed to also provide the electrical energy or voltage required for the drive element 208, which can be designed as an electric motor.
- Drive controller 202 and/or computing unit 204 calculates the electrical voltage applied to drive element 208, For example, with the help of stored characteristic data of the drive element, a resulting torque, which is provided by the drive element 208 on the second rotor of the clutch element 210, which can be designed as a magnetic clutch. Furthermore, drive controller 202 and/or computing unit 204 allow the measurement or determination of a rotational speed of drive element 208 and thus a relative angle of rotation of the drive motor and, if applicable, of the second rotor of clutch element 210. Drive element 210 is connected to clutch element 210, in particular to its second rotor, mechanically connected to directly transmit a driving force and/or a driving torque.
- the torque provided by drive element 210 is introduced into the second rotor of the clutch element and, preferably via the magnetic coupling, applied to the first rotor, which can represent an inner rotor, and thus to the threaded spindle of heat exchanger 212.
- This torque transmission can be subject to slip, ie deviations can occur between the torque provided at the first rotor and the torque transmitted to the second rotor.
- a ratio of torque to slip angle can be formed.
- the position of the cleaning element along the axial direction can then be determined via a previously known thread pitch of the threaded spindle of the heat exchanger 212 and/or a change in position can be assigned to a motor rotation of the drive element 208 .
- Reaching end positions of the cleaning element in the axial direction in the cylinder tube or along the threaded spindle can be determined, for example, via a first initiator 214 for the first end position and a second initiator 216 for the second end position.
- the torque that the drive element 208 exerts on the second rotor of the clutch element 210 can be 40 Nm and a slip angle with the torque of 40 Nm can be 7°.
- a thread pitch of the threaded spindle is 8mm per thread revolution according to this embodiment.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cleaning In General (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
Die Erfindung betrifft eine Antriebsvorrichtung für eine Reinigungsvorrichtung für einen Wärmetauscher, eine Reinigungsvorrichtung und einen Wärmetauscher mit einer derartigen Antriebsvorrichtung. Die Erfindung liegt somit insbesondere auf dem Gebiet der Wärmetauscher.The invention relates to a drive device for a cleaning device for a heat exchanger, a cleaning device and a heat exchanger with such a drive device. The invention is thus particularly in the field of heat exchangers.
Wärmetauscher zum Wärmen oder zum Abkühlen eines Arbeitsmediums sind aus dem Stand der Technik vielfältig bekannt. Ohne Beschränkung der Allgemeinheit soll im Folgenden das Arbeitsmedium Erdgas näher betrachtet werden. Erdgas aus Bodenspeichern weist häufig einen besonders hohen Prozentsatz an unerwünschten Begleitstoffen und besonders hohe Wasseranteile auf. Es ist wünschenswert, die Begleitstoffe sowie den Wasseranteil aus dem Erdgas zu entfernen, bevor es für weitere Zwecke eingesetzt wird. Eine Möglichkeit hierzu stellt die Kühlung des Erdgases in einem oder mehreren Schritten auf geeignete tiefe Temperaturen dar. Insbesondere kann hierbei eine Verflüssigung des Erdgases zweckmäßig sein.Various heat exchangers for heating or cooling a working medium are known from the prior art. Without restricting the generality, the working medium natural gas is to be considered in more detail below. Natural gas from ground storage often has a particularly high percentage of undesirable accompanying substances and a particularly high proportion of water. It is desirable to remove the accompanying substances and the water content from the natural gas before it can be used for other purposes. One possibility for this is the cooling of the natural gas in one or more steps to suitably low temperatures. In particular, liquefaction of the natural gas can be expedient here.
Bei der Abkühlung von Erdgas kommt es durch die genannten Begleitstoffe im Wärmetauscher zumeist zu Ablagerungen auf den Wärmeübertragungsflächen, wobei der zeitliche Verlauf solcher Ablagerungen von den Betriebsbedingungen und der jeweiligen Erdgaszusammensetzung abhängt. Die Wärmeübertragungsflächen müssen daher in bestimmten Intervallen gereinigt werden. Aus den genannten Gründen ist es allerdings schwierig, allgemein gültige Reinigungsintervalle für die betreffenden Wärmetauscher anzugeben.When natural gas is cooled, the accompanying substances mentioned in the heat exchanger usually cause deposits on the heat transfer surfaces, with the course of such deposits over time depending on the operating conditions and the respective composition of the natural gas. The heat transfer surfaces must therefore be cleaned at certain intervals. For the reasons mentioned, however, it is difficult to specify generally applicable cleaning intervals for the relevant heat exchangers.
Kondensierende und gefrierende Begleitstoffe wie Wasser, CO2 sowie Kohlenwasserstoffverbindungen scheiden sich an den Wärmeübertragungsflächen ab und reduzieren somit den Wärmeübergang. Auch bei Betriebstemperaturen über dem Gefrierpunkt von Wasser kann es ferner an den Wärmeübertragungsflächen zu Bildung von Methanhydrat kommen.Condensing and freezing accompanying substances such as water, CO 2 and hydrocarbon compounds are separated on the heat transfer surfaces and thus reduce the heat transfer. Methane hydrate can also form on the heat transfer surfaces even at operating temperatures above the freezing point of water.
Zylinderrohre von Wärmetauschern können beispielsweise mit einer Reinigungsvorrichtung versehen sein, mittels welcher Ablagerungen von den Wärmeübertragungsflächen in den Zylinderrohren mechanisch beseitigt werdenCylinder tubes of heat exchangers can be provided, for example, with a cleaning device, by means of which deposits from the Heat transfer surfaces in the cylinder tubes are eliminated mechanically
können. Beispielsweise offenbart die
Eine derartige Reinigungsvorrichtung weist jedoch den Nachteil auf, dass für das Antriebselement, welches typischerweise als ein Elektromotor ausgebildet ist, eine elektrische Verkabelung bereitgestellt werden muss. Da der Elektromotor zusammen mit der Reinigungsvorrichtung häufig in einer druckdichten Umgebung mit dem Innenraum des Zylinderrohrs untergebracht werden muss, ist daher typischerweise ein druckdichte Stromdurchführung notwendig, um das Antriebselement mit elektrischer Energie von einer externen Energiequelle versorgen zu können. Dies erhöht nicht nur den Fertigungsaufwand und somit die Herstellungskosten, sondern erhöht auch den Wartungsaufwand und die Gefahr von Undichtheiten im Wärmetauschersystem.However, such a cleaning device has the disadvantage that electrical wiring must be provided for the drive element, which is typically designed as an electric motor. Since the electric motor together with the cleaning device often has to be accommodated in a pressure-tight environment with the interior of the cylinder tube, a pressure-tight power bushing is therefore typically necessary in order to be able to supply the drive element with electrical energy from an external energy source. This not only increases the manufacturing effort and thus the manufacturing costs, but also increases the maintenance effort and the risk of leaks in the heat exchanger system.
Es ist daher die Aufgabe der vorliegenden Erfindung, eine vereinfachte und zuverlässigere Möglichkeit zum Reinigen der Zylinderrohre von Wärmeabscheidern bereitzustellen.It is therefore the object of the present invention to provide a simplified and more reliable option for cleaning the cylinder tubes of heat separators.
Diese Aufgabe wird durch eine Antriebsvorrichtung, eine Reinigungsvorrichtung und einen Wärmetauscher mit den Merkmalen der jeweiligen unabhängigen Ansprüche gelöst. Bevorzugte Ausführungsformen sind Gegenstand der abhängigen Ansprüche sowie der nachfolgenden Beschreibung.This object is achieved by a drive device, a cleaning device and a heat exchanger having the features of the respective independent claims. Preferred embodiments are the subject of the dependent claims and the following description.
In einem ersten Aspekt betrifft die Erfindung eine Antriebsvorrichtung für eine Reinigungsvorrichtung für ein Zylinderrohr eines Wärmetauschers. Die Antriebsvorrichtung weist eine Gewindespindel auf, welche dazu ausgelegt ist, in einer axialen Richtung koaxial mit dem Zylinderrohr des Wärmetauschers in dem Zylinderrohr angeordnet zu werden und durch Drehung ein Reinigungselement in dem Zylinderrohr entlang der axialen Richtung zu verschieben. Ferner weist die Antriebsvorrichtung ein Kupplungselement mit einem ersten Rotor und einem mit dem ersten Rotor gekoppelten zweiten Rotor auf, wobei der erste Rotor mit der Gewindespindel mechanisch starr und mit dem Zylinderrohr fluiddicht und/oder druckdicht verbindbar ist, und wobei der zweite Rotor mit einem Antriebselement derart mechanisch verbindbar ist, dass die Gewindespindel durch das Antriebselement über den zweiten Rotor und den ersten Rotor drehbar ist.In a first aspect, the invention relates to a drive device for a cleaning device for a cylinder tube of a heat exchanger. The driving device has a screw shaft, which is designed to be arranged in an axial direction coaxially with the cylinder tube of the heat exchanger in the cylinder tube and, by rotation, to displace a cleaning element in the cylinder tube along the axial direction. Furthermore, the drive device has a coupling element with a first rotor and a second rotor coupled to the first rotor, the first rotor being mechanically rigid with the threaded spindle and being connectable to the cylinder tube in a fluid-tight and/or pressure-tight manner, and the second rotor having a drive element is mechanically connectable in such a way that the threaded spindle can be rotated by the drive element via the second rotor and the first rotor.
In einem weiteren Aspekt betrifft die Erfindung eine Reinigungsvorrichtung für einen Wärmetauscher, umfassend eine erfindungsgemäße Antriebsvorrichtung, sowie ein Reinigungselement, welches derart auf der Gewindespindel anbringbar ist, dass das Reinigungselement durch Drehung der Gewindespindel in axialer Richtung durch das Zylinderrohr verschiebbar ist.In a further aspect, the invention relates to a cleaning device for a heat exchanger, comprising a drive device according to the invention and a cleaning element which can be attached to the threaded spindle in such a way that the cleaning element can be displaced in the axial direction through the cylinder tube by rotating the threaded spindle.
In einem weiteren Aspekt betrifft die Erfindung einen Wärmetauscher, umfassend zumindest ein Zylinderrohr, wobei das zumindest eine Zylinderrohr mit einer erfindungsgemäßen Reinigungsvorrichtung ausgestattet ist, sowie zumindest ein Antriebselement, welches derart mit dem zweiten Rotor der zumindest einen Reinigungsvorrichtung mechanisch verbunden ist, dass der zweite Rotor durch das Antriebselement antreibbar ist.In a further aspect, the invention relates to a heat exchanger, comprising at least one cylinder tube, wherein the at least one cylinder tube is equipped with a cleaning device according to the invention, and at least one drive element, which is mechanically connected to the second rotor of the at least one cleaning device such that the second rotor can be driven by the drive element.
Dass der erste Rotor mit dem Zylinderrohr fluiddicht und/oder druckdicht verbindbar ist, bedeutet dabei, dass der erste Rotor derart mit dem Zylinderrohr verbunden werden kann, dass kein Fluid zwischen dem ersten Rotor und dem Zylinderrohr hindurchdringen kann und dass kein Fluid über den ersten Rotor aus dem Zylinderrohr entweichen kann. Sofern der erste Rotor druckdicht mit dem Zylinderrohr verbunden ist, kann auch dann kein Fluid zwischen dem ersten Rotor und dem Zylinderrohr oder durch den ersten Rotor hindurchdringen, wenn das Fluid einen signifikanten Überdruck gegenüber dem Umgebungsdruck außerhalb des Zylinderrohrs und/oder außerhalb des ersten Rotors aufweist, beispielsweise einen Überdruck von 10 bar, 20 bar, 50 bar oder 100 bar.The fact that the first rotor can be connected to the cylinder tube in a fluid-tight and/or pressure-tight manner means that the first rotor can be connected to the cylinder tube in such a way that no fluid can penetrate between the first rotor and the cylinder tube and that no fluid can penetrate through the first rotor can escape from the cylinder barrel. If the first rotor is connected to the cylinder tube in a pressure-tight manner, no fluid can penetrate between the first rotor and the cylinder tube or through the first rotor, even if the fluid has a significant overpressure compared to the ambient pressure outside the cylinder tube and/or outside the first rotor , For example, an overpressure of 10 bar, 20 bar, 50 bar or 100 bar.
Dass die Gewindespindel drehbar ist bzw. in Drehung versetzt werden kann, bedeutet dabei, dass die Gewindespindel um ihre Längsachse, welche sich in die axiale Richtung erstreckt, drehbar ist.The fact that the threaded spindle is rotatable or can be rotated means that the threaded spindle is rotatable about its longitudinal axis, which extends in the axial direction.
Die Erfindung bietet den Vorteil, dass mittels des Kupplungselements eine effiziente Übertragung der Antriebskraft und/oder eines Antriebsmoments von dem Antriebselement auf die Gewindespindel und somit auf das Reinigungselement übertragen werden kann, ohne dass dafür eine Unterbrechung und/oder eine Durchführung durch eine Abgrenzung bzw. Abschirmung eines Druckbereichs innerhalb des Zylinderrohrs gegenüber einem Außenbereich außerhalb des Zylinderrohrs und/oder außerhalb des ersten Rotors erforderlich ist. Mit anderen Worten muss der vorzugsweise abgeschlossene Innenraum des Zylinderrohrs, wenn dieser mit dem ersten Rotor in Verbindung steht, nicht zugänglich gemacht werden, um die Antriebskraft von dem Antriebselement dem ersten Rotor bereitzustellen. Auf diese Weise kann der Herstellungsaufwand für die Antriebsvorrichtung reduziert werden, wodurch auch die Herstellungskosten gesenkt werden können.The invention offers the advantage that, by means of the coupling element, an efficient transmission of the drive force and/or a drive torque can be transmitted from the drive element to the threaded spindle and thus to the cleaning element without an interruption and/or passage through a delimitation or Shielding of a pressure area inside the cylinder barrel from an outside area outside Cylinder tube and / or outside of the first rotor is required. In other words, the preferably closed interior of the cylinder tube, when it is connected to the first rotor, does not have to be made accessible in order to provide the driving force from the drive element to the first rotor. In this way, the manufacturing outlay for the drive device can be reduced, as a result of which the manufacturing costs can also be lowered.
Ferner bietet die Erfindung den Vorteil, dass Durchführungen durch eine Abgrenzung bzw. Einhausung bzw. Wandung, etwa für Versorgungsleitungen, nicht erforderlich sind, da das Antriebselement erfindungsgemäß nicht notwendigerweise in einem Druckbereich, welcher mit dem Innenraum des Zylinderrohrs in fluidischer Verbindung steht, angeordnet werden muss. Vielmehr kann das Antriebselement außerhalb dieses Druckbereichs angeordnet werden, wo beispielsweise ein Umgebungsdruck herrscht, welcher deutlich niedriger sein kann, als der im Druckbereich im Innenraum des Zylinderrohrs vorherrschende Druck. Dadurch ist es nicht zwingend erforderlich, dass das Antriebselement auch für einen Betrieb unter hohem Druck ausgelegt ist. Vielmehr können vorzugsweise handelsübliche Antriebselemente, wie etwa handelsübliche Elektromotoren, verwendet werden, welche nicht notwendigerweise für einen Betrieb unter hohem Druck geeignet sind. Dadurch können die Herstellungskosten weiter gesenkt werden.The invention also offers the advantage that passages through a boundary or housing or wall, for example for supply lines, are not required, since the drive element according to the invention is not necessarily arranged in a pressure area which is in fluid communication with the interior of the cylinder tube must. Rather, the drive element can be arranged outside of this pressure range, where, for example, an ambient pressure prevails, which can be significantly lower than the pressure prevailing in the pressure range in the interior of the cylinder tube. As a result, it is not absolutely necessary for the drive element to also be designed for operation under high pressure. Rather, commercially available drive elements, such as commercially available electric motors, can preferably be used, which are not necessarily suitable for operation under high pressure. As a result, the manufacturing costs can be further reduced.
Zudem bietet die Erfindung den Vorteil, dass die Gefahr von Leckagen reduziert werden kann, da auf Durchführungen, welche herkömmlicherweise zum Anschließen einer Energieversorgung an ein im Druckbereich angeordnetes Antriebselement erforderlich sind, verzichtet werden kann. Dadurch kann zum einen der Wartungsaufwand reduziert werden und zum anderen eine Fehleranfälligkeit bzw. Ausfallzeiten des Wärmetauschers reduziert werden.In addition, the invention offers the advantage that the risk of leaks can be reduced since bushings which are conventionally required for connecting an energy supply to a drive element arranged in the pressure area can be dispensed with. As a result, on the one hand the maintenance effort can be reduced and on the other hand a susceptibility to errors or downtimes of the heat exchanger can be reduced.
Vorzugsweise ist der zweite Rotor fluiddicht und/oder druckdicht von dem ersten Rotor abgegrenzt. Mit anderen Worten sind der erste Rotor und der zweite Rotor derart miteinander gekoppelt, dass keine fluidische Verbindung zwischen beiden besteht. Dies bietet den Vorteil, dass auch dann kein Fluid an eine Koppelstelle zwischen dem ersten und dem zweiten Rotor hindurchdringen kann, wenn an der Position des ersten Rotors ein höherer oder niedrigerer Druck vorherrscht, als an der Position des zweiten Rotors. Besonders bevorzugt sind der erste Rotor und der zweite Rotor derart voneinander fluiddicht abgegrenzt, dass auch bei einem großen Druckunterschied kein Fluid vom ersten Rotor zum zweiten Rotor hindurchdringen kann, oder umgekehrt. Dies ermöglicht beispielsweise, dass der erste Rotor im Druckbereich, welcher mit dem Innenraum des Zylinderrohrs in fluidischer Verbindung steht, angeordnet werden kann, während der zweite Rotor außerhalb, beispielsweise bei Umgebungsdruck, angeordnet ist, oder umgekehrt.The second rotor is preferably separated from the first rotor in a fluid-tight and/or pressure-tight manner. In other words, the first rotor and the second rotor are coupled to one another in such a way that there is no fluidic connection between the two. This offers the advantage that even then no fluid can penetrate to a coupling point between the first and the second rotor if a higher or lower pressure prevails at the position of the first rotor than at the position of the second rotor. The first rotor and the second rotor are particularly preferred separated from each other in a fluid-tight manner, so that even with a large pressure difference, no fluid can penetrate from the first rotor to the second rotor, or vice versa. This makes it possible, for example, for the first rotor to be arranged in the pressure area which is in fluid communication with the interior of the cylinder tube, while the second rotor is arranged outside, for example at ambient pressure, or vice versa.
Vorzugsweise weist das Kupplungselement eine Magnetkupplung auf, oder ist als solche ausgebildet. Dies ermöglicht ein effizientes Koppeln mittels Magnetkräften, so dass nicht notwendigerweise eine mechanische Verbindung zwischen dem ersten und dem zweiten Rotor zur Kraftübertragung erforderlich ist. Dies ist insbesondere dahingehend vorteilhaft, dass dies eine einfache und/oder effiziente fluiddichte und/oder druckdichte Abgrenzung zwischen dem ersten und dem zweiten Rotor ermöglicht. Besonders bevorzugt weist das Kupplungselement einen Spalttopf auf, welcher den ersten Rotor und den zweiten Rotor fluiddicht und/oder druckdicht voneinander abgrenzt. Dabei kann beispielsweise der erste Rotor innerhalb des Spalttopfes angeordnet sein, vorzugsweise auf einer dem Zylinderrohr und/oder der Gewindestange zugewandten Seite der Kupplungseinheit, während der zweite Rotor außerhalb des Spalttopfes angeordnet ist, vorzugsweise auf einer dem Zylinderrohr und/oder der Gewindestange abgewandten Seite der Kupplungseinheit. Dabei sind der erste Rotor und der zweite Rotor vorzugsweise durch den Spalttopf hindurch magnetisch koppelbar. Dabei ist das Kupplungselement vorzugsweise derart ausgebildet, dass ein durch das Antriebselement auf den zweiten Rotor beaufschlagtes Drehmoment zumindest teilweise auf den ersten Rotor übertragbar ist. Mit anderen Worten kann durch ein Antreiben des zweiten Rotors der erste Rotor zumindest teilweise angetrieben werden. Die Übertragung der durch das Antriebselement auf den zweiten Rotor wirkenden Antriebskraft bzw. des Antriebsmoments auf den ersten Rotor kann dabei schlupfbehaftet sein.The coupling element preferably has a magnetic coupling or is designed as such. This enables efficient coupling by means of magnetic forces, so that a mechanical connection between the first and the second rotor is not necessarily required for power transmission. This is particularly advantageous in that it enables a simple and/or efficient fluid-tight and/or pressure-tight delimitation between the first and the second rotor. The coupling element particularly preferably has a containment shell which delimits the first rotor and the second rotor from one another in a fluid-tight and/or pressure-tight manner. In this case, for example, the first rotor can be arranged inside the containment shell, preferably on a side of the clutch unit that faces the cylinder tube and/or the threaded rod, while the second rotor is arranged outside of the containment shell, preferably on a side that faces away from the cylinder tube and/or the threaded rod clutch unit. The first rotor and the second rotor can preferably be magnetically coupled through the containment shell. The coupling element is preferably designed in such a way that a torque applied to the second rotor by the drive element can be at least partially transmitted to the first rotor. In other words, the first rotor can be at least partially driven by driving the second rotor. The transmission of the driving force acting by the driving element on the second rotor or the driving torque to the first rotor can be subject to slip.
Vorzugsweise weist ein Wärmetauscher eine Mehrzahl von Zylinderrohren mit jeweils einer Reinigungsvorrichtung auf. Besonders bevorzugt weist ein Wärmetauscher eine Mehrzahl von Antriebselementen auf. Insbesondere kann jedes Zylinderrohr eines Wärmetauschers eine eigene Reinigungsvorrichtung und vorzugsweise ein damit verbundenes eigenes Antriebselement aufweisen. Alternativ können mehrere Reinigungsvorrichtungen über eine Antriebseinheit angetrieben werden.A heat exchanger preferably has a plurality of cylinder tubes, each with a cleaning device. A heat exchanger particularly preferably has a plurality of drive elements. In particular, each cylinder tube of a heat exchanger can have its own cleaning device and preferably its own drive element connected thereto. Alternatively, several cleaning devices can be driven via a drive unit.
Vorzugsweise umfasst der Wärmetauscher eine Steuereinheit, welche dazu eingerichtet ist, eine Position des zumindest einen Reinigungselements entlang der zumindest einen Gewindespindel und/oder entlang des zumindest einen Zylinderrohrs in der axialen Richtung zu ermitteln und/oder das zumindest eine Antriebselement derart zu steuern und/oder zu regeln, dass das zumindest eine Reinigungselement eine vorbestimmte Position einnimmt und/oder eine vorbestimmte Bewegung in der axialen Richtung ausführt. Die Steuereinheit kann dabei beispielsweise in die Antriebseinheit und/oder in das Antriebselement und/oder in die Reinigungsvorrichtung integriert sein oder mit dieser verbunden sein. Vorzugsweise kann jede Reinigungsvorrichtung und/oder jedes Antriebselement über eine eigenen Steuereinheit geregelt und/oder gesteuert werden, oder es kann eine Steuereinheit dazu ausgelegt sein, mehrere Reinigungsvorrichtungen und/oder Antriebselemente zu steuern und/oder zu regeln.The heat exchanger preferably includes a control unit which is set up to determine a position of the at least one cleaning element along the at least one threaded spindle and/or along the at least one cylinder tube in the axial direction and/or to control the at least one drive element in this way and/or to regulate that the at least one cleaning element assumes a predetermined position and/or executes a predetermined movement in the axial direction. The control unit can, for example, be integrated into the drive unit and/or the drive element and/or the cleaning device or be connected to it. Each cleaning device and/or each drive element can preferably be regulated and/or controlled via its own control unit, or a control unit can be designed to control and/or regulate a number of cleaning devices and/or drive elements.
Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It goes without saying that the features mentioned above and those still to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present invention.
Die Erfindung ist anhand eines Ausführungsbeispiels in den Zeichnungen schematisch dargestellt und wird im Folgenden unter Bezugnahme auf die Zeichnungen beschrieben.The invention is shown schematically in the drawings using an exemplary embodiment and is described below with reference to the drawings.
Der Wärmetauscher 13 weist eine Reinigungsvorrichtung 10 auf, welche eine im Inneren der Kühlwendel 2 befindliche, in eine axiale Richtung 100 verlaufende Gewindespindel 3 aufweist. Die Gewindespindel 3 ist über einen ersten Rotor 32, welcher als Innenrotor ausgebildet ist, angetrieben und ist in einer Lagerstelle gelagert, die vorzugsweise als Axial-/Radial-Mischlager 5 ausgeführt ist. Am anderen Ende der Gewindespindel 3 kann diese in einer radialen Lagerstelle, die vorzugsweise als Gleitlagerbuchse ausgeführt ist, gelagert sein (nicht gezeigt). An dem anderen Ende des Wärmetauschers 13 kann außerdem ein thermisch entkoppeltes Kondensatreservoir sowie ein Heizelement zur Erhitzung von Kondensat in dem Kondensatreservoir vorhanden sein, um das durch das Reinigungselement 12 dort hin beförderte Kondensat zu schmelzen und abzuführen.The heat exchanger 13 has a
Der erste Rotor 32 ist dabei als Innenrotor als ein Teil eines Kupplungselements 30 ausgebildet, welches ferner einen zweiten Rotor 34, oder als ein Außenrotor ausgebildet ist, umfasst. Das Kupplungselement 30 ist dabei als eine Magnetkupplung ausgebildet, sodass der erste Rotor 32 und der zweite Rotor 34 durch einen Spalttopf 36 voneinander getrennt sind und über eine Magnetkraft, welche von den Magnetelementen 38 bereitgestellt wird, miteinander koppeln. Dies ermöglicht, dass der Rotor mit dem Innenraum 2a der Kühlwendel 2 in fluidischer Verbindung steht, während der zweite Rotor 34 davon getrennt angeordnet ist und beispielsweise einem Umgebungsdruck ausgesetzt sein kann. Somit kann der erste Rotor 32 einem anderen Druck ausgesetzt sein, als der zweite Rotor 32. Der Spalttopf ist dabei derart ausgebildet, dass dieser einem Druckunterschied zwischen dem Innenraum 2a und der Umgebung außerhalb der Kühlwendel 2 bzw. des zweiten Rotors 34 standhalten kann und dass der erste Rotor 32 und der zweite Rotor 34 über die Magnetelemente 38 durch den Spalttopf 36 hindurch koppeln können. Somit kann der zweite Rotor 34 von einem außerhalb des Wärmetauschers 13 bzw. der Kühlwendel 2 angeordneten Antriebselement (nicht gezeigt) angetrieben werden, wobei die Antriebskraft zumindest teilweise über die Magnetkupplung auf den ersten Rotor 32 übertragen wird, um die Gewindestange 3 zu drehen und dadurch das Reinigungselement 12 zu bewegen.The first rotor 32 is designed as an inner rotor as part of a clutch element 30, which also includes a
Durch ein Drehen des zweiten Rotors 34 wird somit die Gewindespindel 3 in Drehung versetzt, sodass das Reinigungselement 12 auf der Gewindespindel 3 entlang der Kühlwendel 2 in axialer Richtung verschoben wird. Im vorliegenden Beispiel wird eine Gewindespindel 3 beispielsweise mit Trapezprofil eingesetzt. Eine Umkehr der Bewegungsrichtung des Räumers 12 setzt eine Umkehr der Rotationsrichtung der Gewindespindel 3 voraus.Rotating the
Im Betrieb des Wärmetauschers 13 wird über eine beidseitige Arbeitsmedium-Eintrittsöffnung 14 beispielsweise feuchtes, verschmutztes Arbeitsmedium in den Zwischenraum zwischen Gewindespindel 3 und zwischen Kühlwendel 2 bzw. in den Innenraum des Zylinderrohrs geführt und strömt in axialer Richtung 100 zu der Arbeitsmedium-Austrittsöffnung (nicht gezeigt) am anderen Ende des Wärmetauschers 13. Das Arbeitsmedium strömt auf der Innenfläche der hohlzylindrischen Kühlwendel 2 entlang der axialen Richtung 100. Über eine beidseitige Kühlmittel-Eintrittsöffnung 16 wird dem Raum zwischen Kühlwendel 2 und Außenzylinderrohr 1 Kühlmittel zugeführt, das zum anderen Ende des Wärmetauschers 13 fließt und diesen durch die Kühlmittel-Austrittsöffnung (nicht gezeigt) verlässt. Das Kühlmittel strömt dabei in dem zwischen Außenzylinderrohr 1 und Kühlwendel 2 gebildeten Kanal 23 spiralförmig in axialer Richtung. Das Kühlmittel entzieht der Kühlwendel 2 Wärme, sodass wiederum dem Arbeitsmedium Wärme entzogen wird.During operation of the heat exchanger 13, moist, contaminated working medium, for example, is fed via a working medium inlet opening 14 on both sides into the space between the threaded spindle 3 and between the cooling coil 2 or into the interior of the cylinder tube and flows in the
Durch die unterschiedlichen Druckverhältnisse zwischen dem Kühlmedium, beispielsweise Stickstoff bei maximal 10 bar, und dem Arbeitsmedium, hier CNG mit Begleitstoffen unter anderem von Stickstoff von 4 bis 220 bar, und einem Umgebungsdruck von ca. 1 bar, kann Stickstoff als Begleitstoff bei hohem Druck (bspw. bei 10 bar) durch Flüssigstickstoff bei niedrigem Druck (bspw. bei 1 bar), bedingt durch die unterschiedlichen druckabhängigen Phasenübergänge zum Verflüssigen gebracht und abgeschieden werden. Der hier vorgeschlagene Wärmetauscher 13 kann somit auch zur Verflüssigung von Stickstoff eingesetzt werden.Due to the different pressure ratios between the cooling medium, for example nitrogen at a maximum of 10 bar, and the working medium, here CNG with accompanying substances including nitrogen from 4 to 220 bar, and an ambient pressure of approx. 1 bar, nitrogen can be used as an accompanying substance at high pressure (e.g. at 10 bar) by liquid nitrogen at low pressure (e.g. at 1 bar), caused by the different pressure-dependent phase transitions, are liquefied and separated. The heat exchanger 13 proposed here can thus also be used for the liquefaction of nitrogen.
Zum Zwecke der Reinigung der Wärmeübertragungsflächen, beispielsweise von Wasser bzw. Eis in der ersten Stufe bzw. von höheren Kohlenwasserstoffen, CO2 und/oder weiteren Begleitstoffen, wird die Gewindespindel 3 von einem Antriebselement über das Kupplungselement in Drehung versetzt. Das Reinigungselement 12, das in das Gewinde der Gewindespindel 3 eingreift, wird hierdurch in eine Translationsbewegung in axiale Richtung versetzt. Auf seinem Weg in axiale Richtung nimmt das Reinigungselement 12 die genannten auskondensierten Begleitstoffe mit. Diese werden bei Erreichen des Kondensatreservoirs am anderen Ende des Wärmetauschers in das selbige geschoben.For the purpose of cleaning the heat transfer surfaces, for example water or ice in the first stage or higher hydrocarbons, CO 2 and/or other accompanying substances, the threaded spindle 3 is rotated by a drive element via the coupling element. The cleaning element 12, which engages in the thread of the threaded spindle 3, is thereby set in a translational movement in the axial direction. On its way in the axial direction, the cleaning element 12 takes the condensed accompanying substances mentioned with it. When they reach the condensate reservoir at the other end of the heat exchanger, these are pushed into the same.
Es sei darauf hingewiesen, dass der hier erläuterte Wärmetauscher 13 nicht nur für die Erdgasverflüssigung, sondern für eine Vielzahl industrieller Anwendungen mit entsprechenden Arbeitsmedien adaptierbar und einsetzbar ist. Die Reinigungsvorrichtung 10 und/oder das Reinigungselement 12 können als wenig komplexe Austauschteile an die Bedürfnisse der jeweiligen Einsatzgebiete angepasst und im Schadensfall rasch ersetzt werden.It should be pointed out that the heat exchanger 13 explained here can be adapted and used not only for natural gas liquefaction, but also for a large number of industrial applications with corresponding working media. The
Gemäß einer bevorzugten Ausführungsform kann beispielsweise das Drehmoment, welches das Antriebselement 208 auf den zweiten Rotor des Kupplungselements 210 ausübt, 40 Nm betragen und ein Schlupfwinkel bei dem Drehmoment von 40 Nm 7° betragen. Eine Gewindesteigung der Gewindespindel beträgt 8mm pro Gewindeumdrehung gemäß dieser Ausführungsform. Bei einem relativen Drehwinkel von 7200° seit der Abfahrt weg vom ersten Initiator 214 in axiale Richtung zum zweiten Initiator kann die Position des Reinigungselements wie folgt errechnet werden: (7200°-7°)*8mm/360°=159,84mm.According to a preferred embodiment, for example, the torque that the
- 11
- Außenzylinderrohrouter cylinder tube
- 22
- Kühlwendelcooling coil
- 2a2a
- Innenraum der KühlwendelInterior of the cooling coil
- 33
- Gewindespindellead screw
- 55
- Axial-/Radial-MischlagerMixed axial/radial bearings
- 1010
- Reinigungsvorrichtungcleaning device
- 1212
- Reinigungselementcleaning element
- 1313
- Wärmetauscherheat exchanger
- 1414
- Arbeitsmedium-EintrittsöffnungWorking medium inlet opening
- 1616
- Kühlmitteleintrittsöffnungcoolant inlet opening
- 2121
- Wendel auf der Außenfläche der KühlwendelCoil on the outer surface of the cooling coil
- 2323
- Kanal der Kühlwendelchannel of the cooling coil
- 3030
- Kupplungselementcoupling element
- 3232
- erster Rotorfirst rotor
- 3434
- zweiter Rotorsecond rotor
- 3636
- Spalttopfcontainment shell
- 3838
- Magnetelementemagnetic elements
- 100100
- axiale Richtungaxial direction
- 200200
- Funktionsweise der Regelungfunctioning of the regulation
- 202202
- Antriebsreglerdrive controller
- 204204
- Recheneinheitunit of account
- 206206
- Spannungsversorgungpower supply
- 208208
- Antriebselementdrive element
- 210210
- Kupplungselementcoupling element
- 212212
- Wärmetauscherheat exchanger
- 214214
- erster Initiatorfirst initiator
- 216216
- zweiter Initiatorsecond initiator
Claims (11)
- A drive arrangement for a cleaning device (10) for a cylinder tube of a heat exchanger (13, 212), the drive arrangement comprising:- a threaded spindle (3) which is designed to be arranged in the cylinder tube coaxially with the cylinder tube of the heat exchanger (13) in an axial direction (100), and to displace a cleaning element (12) in the cylinder tube in the axial direction (100) via rotation;- a coupling element (30, 210) with a first rotor (32), wherein the first rotor (32) can be rigidly mechanically connected to the threaded spindle (3);characterized in that
the coupling element (30, 210) has a second rotor (34) which is coupled to the first rotor (32), wherein the first rotor (32) can be connected to the cylinder tube in a fluid-tight and/or pressure-tight manner, and wherein the second rotor (34) can be mechanically connected to a drive element (208) such that the threaded spindle (3) is rotatable via the second rotor (34) and the first rotor (32) by means of the drive element (208). - The drive arrangement according to claim 1, wherein the second rotor (32) is isolated from the first rotor (34) in a fluid-tight and/or pressure-tight manner.
- The drive arrangement according to claim 1 or 2, wherein the coupling element (30, 210) has a magnetic coupling or is designed as such.
- The drive arrangement according to claim 3, wherein the coupling element (30, 210) has a containment shell (36) which delimits the first rotor (32) and the second rotor (34) from one another in a fluid-tight and/or pressure-tight manner.
- The drive arrangement according to claim 4, wherein the first rotor (32) and the second rotor (34) can be magnetically coupled through the containment shell (36).
- The drive arrangement according to any one of the preceding claims, wherein the coupling element (30, 210) is designed such that a torque charged to the second rotor (34) by the drive element (208) can be transmitted at least partially to the first rotor (32).
- A cleaning device (10) for a heat exchanger (13), comprising:- a drive arrangement according to any one of the preceding claims;- a cleaning element (12) which can be attached to the threaded spindle (3) such that the cleaning element (12) can be displaced in the axial direction (100) through the cylinder tube by rotation of the threaded spindle (3).
- A heat exchanger (13), comprising:- at least one cylinder tube, wherein the at least one cylinder tube is equipped with a cleaning device (10) according to claim 7;- at least one drive element (208) which is mechanically connected to the second rotor (34) of the at least one cleaning device (10) such that the second rotor (10) can be driven by the drive element (208).
- The heat exchanger (13) according to claim 8, wherein the drive element (208) comprises an electric motor or is designed as such.
- The heat exchanger (13) according to claim 8 or 9, wherein the heat exchanger (13) comprises a plurality of cylinder tubes respectively comprising a cleaning device (10) according to claim 7, and a plurality of drive elements (208).
- The heat exchanger (13) according to any one of claims 8 to 10, further comprising a control unit which is configured to determine a position of the at least one cleaning element (12) along the at least one threaded spindle (3) and/or along the at least one cylinder tube in the axial direction (100), and/or to control and/or regulate the at least one drive element (208) such that the at least one cleaning element (12) assumes a predefined position in the axial direction (100) and/or executes a predefined movement in the axial direction (100).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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EP18020198.0A EP3567333A1 (en) | 2018-05-09 | 2018-05-09 | Drive device for a cleaning device for a heat exchanger |
PCT/EP2019/025135 WO2019214850A1 (en) | 2018-05-09 | 2019-05-02 | Drive apparatus for a cleaning apparatus for a heat exchanger |
Publications (3)
Publication Number | Publication Date |
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EP3790671A1 EP3790671A1 (en) | 2021-03-17 |
EP3790671C0 EP3790671C0 (en) | 2023-08-09 |
EP3790671B1 true EP3790671B1 (en) | 2023-08-09 |
Family
ID=62167092
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18020198.0A Withdrawn EP3567333A1 (en) | 2018-05-09 | 2018-05-09 | Drive device for a cleaning device for a heat exchanger |
EP19722795.2A Active EP3790671B1 (en) | 2018-05-09 | 2019-05-02 | Drive arrangement for a heat exchanger cleaning device |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18020198.0A Withdrawn EP3567333A1 (en) | 2018-05-09 | 2018-05-09 | Drive device for a cleaning device for a heat exchanger |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP3567333A1 (en) |
ES (1) | ES2958109T3 (en) |
HU (1) | HUE063326T2 (en) |
PL (1) | PL3790671T3 (en) |
WO (1) | WO2019214850A1 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1761371A (en) * | 1928-07-03 | 1930-06-03 | Spratt Baylor | Boiler-scale-removing device |
DE3939778A1 (en) * | 1989-12-01 | 1991-06-06 | Wilhelm Haeberle | Heat-exchanger with cleaning system - has driven rotary tube working against scrapers on fixed inner and outer tubes |
JP2005501702A (en) * | 2001-08-29 | 2005-01-20 | コンアグラ グロサリイ プロダクツ カンパニー | Device and method for removing deposits on measuring instruments |
CH696551A5 (en) * | 2002-10-28 | 2007-07-31 | Sonceboz Sa | linear actuator for controlling a valve. |
DE102009052856B3 (en) * | 2009-11-11 | 2010-09-09 | Leistritz Ag | Pump i.e. screw pump, has magnetic clutch provided with rotor shaft that is rotatably supported by pump housing, and suction chamber and slit pot connected with each other over line by fluid |
DE102015010455A1 (en) | 2015-08-11 | 2017-02-16 | Linde Aktiengesellschaft | heat exchangers |
-
2018
- 2018-05-09 EP EP18020198.0A patent/EP3567333A1/en not_active Withdrawn
-
2019
- 2019-05-02 PL PL19722795.2T patent/PL3790671T3/en unknown
- 2019-05-02 WO PCT/EP2019/025135 patent/WO2019214850A1/en unknown
- 2019-05-02 HU HUE19722795A patent/HUE063326T2/en unknown
- 2019-05-02 ES ES19722795T patent/ES2958109T3/en active Active
- 2019-05-02 EP EP19722795.2A patent/EP3790671B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
PL3790671T3 (en) | 2023-10-09 |
EP3790671A1 (en) | 2021-03-17 |
WO2019214850A1 (en) | 2019-11-14 |
EP3790671C0 (en) | 2023-08-09 |
ES2958109T3 (en) | 2024-02-01 |
HUE063326T2 (en) | 2024-01-28 |
EP3567333A1 (en) | 2019-11-13 |
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