EP3790671A1 - Antriebsvorrichtung für eine reinigungsvorrichtung für einen wärmetauscher - Google Patents
Antriebsvorrichtung für eine reinigungsvorrichtung für einen wärmetauscherInfo
- Publication number
- EP3790671A1 EP3790671A1 EP19722795.2A EP19722795A EP3790671A1 EP 3790671 A1 EP3790671 A1 EP 3790671A1 EP 19722795 A EP19722795 A EP 19722795A EP 3790671 A1 EP3790671 A1 EP 3790671A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- drive
- heat exchanger
- cylinder tube
- cleaning
- 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.)
- Granted
Links
Classifications
-
- 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
-
- 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"
-
- 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, and a cleaning device and a heat exchanger with such a drive device.
- the invention is therefore particularly in the field of heat exchangers.
- Heat exchangers for heating or for cooling a working medium are widely known from the prior art. Without restricting generality, the working medium natural gas will be considered in more detail below. Natural gas off
- Soil storage often has a particularly high percentage of unwanted impurities and particularly high water content. It is desirable to remove the impurities as well as the water content from the natural gas before it is used for further purposes. One way to do this is the cooling of the
- Natural gas in one or more steps to suitable low temperatures may be appropriate.
- a liquefaction of the natural gas may be appropriate.
- Heat exchangers mostly to deposits on the heat transfer surfaces, the time course of such deposits on the operating conditions and the respective natural gas composition depends.
- the heat transfer surfaces must therefore be cleaned at certain intervals. For the reasons mentioned, however, it is difficult to specify generally valid cleaning intervals for the relevant heat exchangers.
- Hydrocarbon compounds separate on the heat transfer surfaces and thus reduce the heat transfer. Even at operating temperatures above the freezing point of water, it may also come to the heat transfer surfaces to form methane hydrate.
- Cylinder tubes of heat exchangers for example, with a
- the invention relates to a drive device for a
- Drive device comprises a threaded spindle which is adapted to be in an axial direction coaxial with the cylinder tube of the heat exchanger in the
- Cylinder tube to be arranged and to move by rotation a cleaning element in the cylinder tube along the axial direction. Furthermore, the
- a coupling element having a first rotor and coupled to the first rotor second rotor, wherein the first rotor with the
- Threaded spindle mechanically rigid and fluid-tight and / or pressure-tight with the cylinder tube is connectable, and wherein the second rotor is mechanically connectable to a drive element such that the threaded spindle is rotatable 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, that the cleaning element is displaceable by rotation of the threaded spindle in the axial direction through the cylinder tube.
- 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 with the second rotor of the at least one
- Cleaning device is mechanically connected, that the second rotor is 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 there is no fluid between the first rotor and the cylinder tube
- threaded spindle is rotatable or can be set in rotation, means that the threaded spindle about its longitudinal axis, which in the axial
- the invention offers the advantage that by means of the coupling element efficient transmission of the driving force and / or a drive torque of the
- Drive element can be transferred to the threaded spindle and thus to the cleaning element, without causing an interruption and / or a
- a delimitation or shielding of a pressure area within the cylinder tube with respect to an outside area outside the Cylinder tube and / or outside of the first rotor is required.
- the preferably closed interior of the cylinder tube, when it is in communication with the first rotor, must not be made accessible in order to provide the driving force from the drive element to the first rotor. In this way, the manufacturing cost of the drive device can be reduced, whereby the manufacturing cost can be reduced.
- the invention offers the advantage that bushings through a delimitation 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 region which is in fluid communication with the interior of the cylinder tube got to. Rather, the drive element can be arranged outside this pressure range, where, for example, an ambient pressure prevails, which can be significantly lower than the pressure prevailing in the pressure region in the interior of the cylinder tube pressure. As a result, it is not absolutely necessary that the drive element is also designed for operation under high pressure. Rather, commercially available drive elements, such as commercially available electric motors, may be used, which are not necessarily suitable for operation under high pressure. As a result, the production costs can be further reduced.
- the invention has the advantage that the risk of leaks can be reduced since it is possible to dispense with bushings which are conventionally required for connecting a power supply to a drive element arranged in the pressure region. This can on the one hand the
- the second rotor is defined fluid-tight and / or pressure-tight from the first rotor.
- 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.
- first rotor and the second rotor are so separated fluid-tight from each other, that even with a large pressure difference no fluid can pass from the first rotor to the second rotor, or vice versa.
- first rotor in the pressure region which is in fluid communication with the interior of the cylinder tube, can be arranged, while the second rotor is arranged outside, for example at ambient pressure, or vice versa.
- the coupling element 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 for power transmission is not necessarily required.
- the coupling element has a containment shell which delimits the first rotor and the second rotor in a fluid-tight and / or pressure-tight manner from one another.
- the first rotor may be arranged within the containment shell, preferably on a side facing the cylinder tube and / or the threaded rod side of the coupling unit, while the second rotor is disposed outside of the split pot, preferably on a side facing away from the cylinder tube and / or the threaded rod side clutch unit.
- the first rotor and the second rotor can preferably be magnetically coupled through the gap pot.
- the coupling element is preferably designed such that a torque applied to the second rotor by the drive element is at least partially transferable to the first rotor.
- the first rotor can be at least partially driven.
- the transmission of the driving force acting on the second rotor by the drive element or of the drive torque on the first rotor may be subject to slip.
- a heat exchanger has a plurality of cylinder tubes, each with a cleaning device.
- a heat exchanger has a plurality of drive elements.
- each cylinder tube of a heat exchanger may have its own cleaning device and preferably a drive element connected thereto.
- the heat exchanger comprises a control unit which is adapted 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 and / or at least one drive element to control that the at least one cleaning element occupies a predetermined position and / or performs a predetermined movement in the axial direction.
- the control unit can, for example, in the
- Control unit can be controlled and / or controlled, or it can be designed to control a plurality of cleaning devices and / or drive elements and / or regulate a control unit.
- FIG. 1 shows schematically a longitudinal section through an embodiment of a heat exchanger.
- FIG. 2 shows a schematic representation of a principle of operation of a control for a drive device. Detailed description of the figures
- 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 a the heat exchanger 13 a
- This cooling coil 2 has at least one, preferably
- This channel 23 is generated by a corresponding helix 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), the leadership of a
- Serve cleaning element 12 which is also referred to as a scraper.
- the cleaning element 12 may be formed as an ice scraper.
- the heat exchanger 13 has a cleaning device 10, which is located in the interior of the cooling coil 2, in an axial direction 100 extending
- the threaded spindle 3 is driven via a first rotor 32, which is designed as an inner rotor, and is mounted in a bearing point, which is preferably designed as an axial / radial mixing bearing 5. At the other end of the threaded spindle 3, this can be stored in a radial bearing, which is preferably designed as a plain bearing bush (not shown). At the other end of the heat exchanger 13 may also be a thermally decoupled
- Condensate reservoir and a heating element for heating condensate may be present in the condensate reservoir in order to melt and remove the condensate transported through the cleaning element 12 there.
- the first rotor 32 is formed as an inner rotor as part of a coupling element 30, which further comprises a second rotor 34, or as an outer rotor comprises.
- the coupling element 30 is designed as a magnetic coupling, so that the first rotor 32 and the second rotor 34 are separated from each other by a split pot 36 and a magnetic force, which of the
- Magnet elements 38 is provided, couple together. This allows the rotor to be in fluid communication with the interior 2a of the cooling coil 2, while the second rotor 34 is disposed apart therefrom and may, for example, be exposed to ambient pressure.
- the first rotor 32 may be another The split pot is designed such that it can withstand a pressure difference between the interior 2a and the environment outside the cooling coil 2 and the second rotor 34 and that the first rotor 32 and the second rotor 34 can be coupled through the gap pot 36 via the magnetic elements 38.
- the second rotor 34 can be driven by a drive element (not shown) arranged outside the heat exchanger 13 or the cooling coil 2, the drive force being at least partially transmitted 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.
- the threaded spindle 3 is thus set in rotation, so that the cleaning element 12 is displaced on the threaded spindle 3 along the cooling coil 2 in the axial direction.
- a threaded spindle 3 is used for example with trapezoidal profile. A reversal of the direction of movement of the reamer 12 requires a reversal of the direction of rotation of the threaded spindle 3.
- moist, contaminated working medium is introduced into the intermediate space between threaded spindle 3 and between cooling coil 2 or into the interior of the cylinder tube via a double-sided working medium inlet opening 14 and flows in the axial direction 100 to the working medium outlet opening (not shown)
- 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 flows to the other end of the heat exchanger 13 flows and leaves through the coolant outlet opening (not shown).
- the coolant flows spirally in the axial direction in the channel 23 formed between the outer cylindrical tube 1 and the cooling coil 2.
- the coolant removes heat from the cooling coil 2, which in turn removes heat from the working medium.
- nitrogen at a maximum of 10 bar and the working medium, here CNG with impurities including nitrogen from 4 to 220 bar, and a
- Ambient pressure of about 1 bar nitrogen can be used as a companion at high pressure (For example, at 10 bar) by liquid nitrogen at low pressure (for example, at 1 bar), due to the different pressure-dependent phase transitions to
- Heat exchanger 13 can thus also be used for the liquefaction of nitrogen.
- Cleaning element 12 which engages in the thread of the threaded spindle 3, is thereby displaced in a translational movement in the axial direction. On its way in the axial direction, the cleaning element 12 takes with it the aforementioned condensed accompanying substances. These are pushed into the same upon reaching the condensate reservoir at the other end of the heat exchanger.
- 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 appropriate working media.
- Cleaning device 10 and / or the cleaning element 12 can be adapted as a little complex replacement parts to the needs of the respective application areas and quickly replaced in the event of damage.
- FIG. 2 shows a schematic illustration 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 may have, for example, a drive controller 202 which is connected to a computer 204 in terms of communication technology can and / or can be integrated with the arithmetic unit 204 in the control unit.
- the drive controller 202 is supplied by a power supply or power supply 206 with electrical energy or voltage.
- the power supply 206 is preferably designed to also provide the required electrical energy or voltage for the drive element 208, which may be designed as an electric motor
- the drive controller 202 and / or the computing unit 204 calculates the electrical voltage applied to the drive element 208, For example, with the aid 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 coupling element 210, which may be designed as a magnetic coupling. Furthermore, the drive controller 202 and / or the arithmetic unit 204 allow measuring or determining a rotational speed of the drive element 208 and thus a relative rotational angle of the drive motor, and optionally of the second rotor of the coupling element 210.
- the drive element 210 is connected to the coupling element 210, in particular with its second rotor, mechanically connected to one
- Drive element 210 wide torque is introduced into the second rotor of the coupling element and, preferably via the magnetic coupling, to the first rotor, which can represent an inner rotor, and thus the
- Threaded spindle of the heat exchanger 212 applied.
- This torque transmission may be slip-related, i. that there are deviations between the torque provided at the first rotor and that transmitted to the second rotor
- Torque can come. According to previously determined characteristics of the drive element 208 and the coupling element 210, which are stored for example in the arithmetic unit 204, a ratio of torque to slip angle can be formed. Via a previously known thread pitch of the threaded spindle of the heat exchanger 212, the position of the cleaning element along the axial direction can then be determined and / or a change in position of a
- first initiator 214 for the first end position 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.
- a thread pitch of the threaded spindle is 8mm per
- Thread rotation according to this embodiment.
Landscapes
- 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)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP18020198.0A EP3567333A1 (de) | 2018-05-09 | 2018-05-09 | Antriebsvorrichtung für eine reinigungsvorrichtung für einen wärmetauscher |
| PCT/EP2019/025135 WO2019214850A1 (de) | 2018-05-09 | 2019-05-02 | Antriebsvorrichtung für eine reinigungsvorrichtung für einen wärmetauscher |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3790671A1 true EP3790671A1 (de) | 2021-03-17 |
| EP3790671B1 EP3790671B1 (de) | 2023-08-09 |
| EP3790671C0 EP3790671C0 (de) | 2023-08-09 |
Family
ID=62167092
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18020198.0A Withdrawn EP3567333A1 (de) | 2018-05-09 | 2018-05-09 | Antriebsvorrichtung für eine reinigungsvorrichtung für einen wärmetauscher |
| EP19722795.2A Active EP3790671B1 (de) | 2018-05-09 | 2019-05-02 | Antriebsvorrichtung für eine reinigungsvorrichtung für einen wärmetauscher |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18020198.0A Withdrawn EP3567333A1 (de) | 2018-05-09 | 2018-05-09 | Antriebsvorrichtung für eine reinigungsvorrichtung für einen wärmetauscher |
Country Status (5)
| Country | Link |
|---|---|
| EP (2) | EP3567333A1 (de) |
| ES (1) | ES2958109T3 (de) |
| HU (1) | HUE063326T2 (de) |
| PL (1) | PL3790671T3 (de) |
| WO (1) | WO2019214850A1 (de) |
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 (de) * | 1989-12-01 | 1991-06-06 | Wilhelm Haeberle | Einrichtung zur vermeidung der grenzschicht bei waermetauschern |
| AU2002332783A1 (en) * | 2001-08-29 | 2003-03-18 | Conagra Grocery Products Company | Device and method for removing build-up on measurement gauges |
| CH696551A5 (fr) * | 2002-10-28 | 2007-07-31 | Sonceboz Sa | Actionneur linéaire pour la commande d'une vanne. |
| DE102009052856B3 (de) * | 2009-11-11 | 2010-09-09 | Leistritz Ag | Pumpe mit einer Magnetkupplung |
| DE102015010455A1 (de) | 2015-08-11 | 2017-02-16 | Linde Aktiengesellschaft | Wärmetauscher |
-
2018
- 2018-05-09 EP EP18020198.0A patent/EP3567333A1/de not_active Withdrawn
-
2019
- 2019-05-02 EP EP19722795.2A patent/EP3790671B1/de active Active
- 2019-05-02 PL PL19722795.2T patent/PL3790671T3/pl unknown
- 2019-05-02 ES ES19722795T patent/ES2958109T3/es active Active
- 2019-05-02 HU HUE19722795A patent/HUE063326T2/hu unknown
- 2019-05-02 WO PCT/EP2019/025135 patent/WO2019214850A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| EP3567333A1 (de) | 2019-11-13 |
| EP3790671B1 (de) | 2023-08-09 |
| PL3790671T3 (pl) | 2023-10-09 |
| EP3790671C0 (de) | 2023-08-09 |
| HUE063326T2 (hu) | 2024-01-28 |
| WO2019214850A1 (de) | 2019-11-14 |
| ES2958109T3 (es) | 2024-02-01 |
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