WO2017050429A1

WO2017050429A1 - Use of different materials in multi-part heat exchangers

Info

Publication number: WO2017050429A1
Application number: PCT/EP2016/001580
Authority: WO
Inventors: Christiane Kerber; Jürgen Spreemann; Lel VIACHESLAV; Florian Deichsel
Original assignee: Linde Aktiengesellschaft
Priority date: 2015-09-23
Filing date: 2016-09-21
Publication date: 2017-03-30

Abstract

The invention relates to a heat exchanger system (1) comprising: a first heat exchanger (1a) with a first shell (301) that surrounds a first shell chamber (201), the first heat exchanger (1a) also having a first tube bundle (2a) that is arranged in the first shell chamber (201) such that a medium flowing in the first tube bundle (2a) can exchange heat indirectly with a medium flowing in the first shell chamber (201) of the first heat exchanger (1a); a second heat exchanger (1b) with a second shell (303) that surrounds a second shell chamber (203), the second heat exchanger (1b) also having at least one second tube bundle (2b) that is arranged in the second shell chamber (203) such that a medium flowing in the at least one second tube bundle (2b) can exchange heat indirectly with a medium flowing in the second shell chamber (203), wherein the at least one first and the at least one second tube bundle (2a, 2b) are fluidically interconnected. According to the invention, the at least one first tube bundle (2a) is made of a different material or contains a different material from that of the at least one second tube bundle (2b), and/or the first shell (201) is made of a different material or contains a different material from that of the second shell (203).

Description

description

Use of different materials in multi-part heat exchangers

The invention relates to a heat exchanger device. Such heat transfer devices can, for. To liquefy a hydrocarbon-rich phase (e.g., natural gas) fed gaseously into the heat exchanger means. Thereby, e.g. three tube bundles (precooler, condenser and subcooler) can be arranged one above the other in a common pressure-bearing jacket, the z. B. can be hung in a steel frame. Furthermore, according to DE 10 201 1015 433 it is also possible to use such a three-storey heat exchanger in e.g. to divide three separate apparatus, which then take over the pre-cooling, liquefaction or subcooling.

Basically, there is the problem in the meantime with the heat exchanger devices mentioned at the outset that they are due to their increasing size, their increasing weight and the increasing operating pressures at which the

Heat exchangers are driven, make special demands on the construction. On this basis, the invention is based on the object, a

To provide heat exchanger device of the type mentioned, which is improved in terms of the aforementioned problem.

This object is achieved by a heat transfer device with the features of claim 1.

Advantageous embodiments of the method according to the invention are specified in the corresponding subclaims and are described below. According to claim 1, a heat transfer device is provided, comprising: a first heat exchanger having a first jacket surrounding a first jacket space, wherein the first heat exchanger further comprises a first heat exchanger Having tube bundle, which is arranged in the first jacket space, so that a flowing in the first tube bundle medium with a medium flowing in the first jacket space of the first heat exchanger medium can exchange heat, - a second heat exchanger having a second jacket having a second jacket space wherein the second heat exchanger further comprises at least a second tube bundle disposed in the second jacket space so that a medium flowing in the at least one second tube bundle can indirectly exchange heat with a medium flowing in the second jacket space, and wherein the at least one first and the at least one second tube bundle are in fluid communication with one another, wherein furthermore according to the invention the at least one first tube bundle of the first heat exchanger is made of a different material or has a different material than that

at least one second tube bundle of the second heat exchanger and / or that the first jacket of the first heat exchanger is made of a different material or has a different material than the second jacket of the second heat exchanger.

Furthermore, e.g. the complete second heat exchanger be made of a different material than the first heat exchanger.

According to the invention, the possibility is created by an appropriate choice of material, the ever-increasing design pressures and sizes of

To realize heat exchangers, which would exceed the limits of profitability or buildability for a uniform material (usually made of an aluminum alloy) for all heat exchangers. Thus, e.g. the first or the second heat exchanger completely or with regard to individual components, such as e.g. Tube bundle and / or sheath, made of a steel, in particular carbon steel or stainless steel or nickel steel (for example X8Ni9), while the other heat exchanger is made completely or with respect to individual components, such as. Tube bundle and / or sheath, e.g. from one

Aluminum alloy is made. Other materials that may be used herein are further disclosed below and in the claims. Particularly preferably, the first and the second heat exchanger are formed separately from each other and spaced from each other, except for

Flow connections, in the form of pipelines between the

connecting tubular bundles and possibly jacket spaces run. This separation has advantages, in particular with regard to the transport of the device, since the individual heat exchangers can be transported separately. According to a preferred embodiment of the invention it is provided that the second heat exchanger is formed as a two-story heat exchanger, and at least one further third tube bundle, which is arranged in an associated third jacket space of the second heat exchanger above the second tube bundle, so that in the third Tube bundle flowing medium with a medium flowing in the third jacket space medium can exchange heat indirectly. In this case, the second heat exchanger has a second jacket which surrounds the second and third jacket spaces, such a second jacket being able to consist of two shell sections fixedly connected to one another, each of which surrounds the associated second or third jacket space. In such a two-storey second heat exchanger, it is provided, in particular, that the lower section or floor comprising the second tube bundle carries the upper section or floor comprising the third tube bundle. Furthermore, in particular the second tube bundle is in flow connection with the third tube bundle. The above-described embodiment of the invention with a first

Heat exchanger and a separate, two-storey heat exchanger can, for. obtained by separating a known from the prior art, three-storey heat exchanger, wherein each floor at least one

Having tube bundle, in which case the two individual heat exchanger of the heat exchanger device according to the invention from the possibly different

Materials are manufactured. It is possible in this case to transfer the function of the two upper floors of the originally three-storey heat exchanger to the second heat exchanger according to the invention. Accordingly, the first tube bundle is then in flow connection with the second tube bundle (and via the second tube bundle with the third tube bundle). Alternatively, it is possible to transfer the function of the two lower floors of the formerly three-storey heat exchanger to the second heat exchanger. In this case, if appropriate, the second tube bundle would then be in flow connection with the first tube bundle via the third tube bundle.

According to a preferred embodiment of the invention, in turn, e.g. the first or the second heat exchanger completely or with regard to individual components, such as e.g. Tube bundle and / or sheath, made of a steel, in particular carbon steel or stainless steel or nickel steel (for example X8Ni9), while the other heat exchanger is made completely or with respect to individual components, such as.

Tube bundle and / or sheath, e.g. is made of an aluminum alloy. Other materials that may be used herein are further disclosed below and in the claims.

Also in this embodiment of the invention with a first heat exchanger and a two-storey second heat exchanger again has the advantage that the material-related Baubarkeitsgrenzen of wound heat exchangers, which are usually made of aluminum, are obsolete.

Furthermore, the transport weight of a complete apparatus is much larger, which reduces the handling extremely. If the transport of a complete machine is no longer possible, it is currently being delivered in parts and must then be assembled or completed on site. This effort also falls at one

away according to the invention heat exchanger device away.

The heat exchanger device according to the invention, in particular with the two separated heat exchangers, can be used particularly preferably in the liquefaction of natural gas or methane, in particular on floats

(so-called floating LNG) for the liquefaction of natural gas or methane (eg Shell DMR process, MFC process or other liquefaction processes)

Natural gas / methane).

According to a further embodiment of the invention it is provided that the

Heat exchanger device comprises a third heat exchanger having a third jacket surrounding a third jacket space, wherein the third Heat exchanger further comprises at least a third tube bundle, which is arranged in the third jacket space, so that a medium flowing in the third tube bundle medium can exchange indirect heat with a medium flowing in the third jacket space of the third heat exchanger medium.

In this case, it is preferably provided that the third tube bundle of the third

Heat exchanger is made of a different material or having a different material than the first and / or the second tube bundle of the first and second heat exchanger and / or that the third jacket of the third heat exchanger is made of a different material or has a different material than that first and / or the second jacket of the first and the second heat exchanger.

In particular, therefore, all three heat exchangers can be completely or with respect to individual components, such as e.g. Tube bundle and / or sheath made of different materials disclosed herein. Thus, e.g. each apparatus or heat exchanger is made of a different material, e.g. the first

Heat exchanger made of an aluminum alloy, the second heat exchanger made of a stainless steel and the third heat exchanger made of carbon steel (short C-steel) or a nickel steel (short Ni-steel).

According to a further or alternative embodiment of the invention it is provided that the third tube bundle of the third heat exchanger is made of the same material as the first tube bundle or the second tube bundle, and / or that the third jacket is made of the same material as the first coat or the second coat.

Furthermore, it is provided according to a further embodiment of the invention that the first, the second and the third heat exchanger are formed separately from each other and spaced from each other. This can of course

Flow connections may be provided in the form of pipelines between the tube bundles and / or between the jacket spaces.

In all embodiments of the invention, the first, second, or possibly the third tube bundle may be formed from or comprise one of the following materials: an aluminum alloy, steel, stainless steel, carbon steel, nickel steel (eg, X8Ni9). Here are all imaginable combinations of these or possibly further Materials are possible, it should be noted in each case that the individual components according to the embodiments described herein may be made of different materials or have different materials. As carbon steel (also carbon steel or carbon steel) is referred to in the context of the present invention, a steel, in addition to its main component iron than

Secondary constituent mainly contains carbon (C). The carbon content can be up to 2.1%. A stainless steel in the sense of the present invention is in particular an alloyed or an unalloyed steel (for example according to DIN EN 10020) with a defined degree of purity, in particular with a sulfur and phosphorus content which is not 0.025%

exceeds. Preferably stainless steels are used in the present case. If an aluminum alloy is used as the material, preferably the following alloys are used: EN-AW 5083, AN-W 5049 or EN-AW 6060.

Other aluminum alloys are also conceivable.

Nickel steel has nickel as alloying element. In particular, X8Ni9 or W No. 1.5662 (short X8Ni9) can be used as the nickel steel.

Further, in all embodiments, the first, second, or possibly third sheath may be formed of or comprise one of the following materials: an aluminum alloy, steel, stainless steel, carbon steel, nickel steel (e.g., X8Ni9). Again, the diversity of the materials according to the embodiments described herein is to be considered again.

If herein is a material from which a tube bundle is made, so it is preferably meant that at least the tubes of the tube bundle,

in particular also the core tube, and in particular further components of the

Tube bundle (eg spacers or webs between the individual pipe layers) are made of the relevant material. If furthermore a material is mentioned from which a jacket is made, it is hereby preferably meant that at least one flat wall formed by the jacket which delimits the respective jacket space is made of this material. Particularly preferably, the first, the second and / or the third heat exchanger are each formed as a wound heat exchanger, wherein the respective tube bundle is wound on a core tube of the respective heat exchanger, which carries the load of the respective tube bundle.

Further features and advantages of the invention are intended in the following

Figure descriptions of embodiments of the invention will be explained with reference to the figures. Show it:

Fig. 1 is a schematic representation of a three-story

Heat exchanger device according to the prior art with three heat exchangers whose coats are connected to each other, so that a uniform shell of the overall apparatus is formed;

Fig. 2 is a schematic view of an invention separated

Heat transfer device with two separate heat exchangers;

Fig. 3 is a schematic view of an alternative embodiment of a

heat transfer device according to the invention;

Fig. 4 shows a further embodiment of an inventive

Heat transfer device with three separate heat exchangers; and Fig. 5 is a fragmentary sectional view of tubes of a tube bundle of a heat transfer device according to the invention, which are wound around a core tube.

Figure 1 shows a schematic view of a three-story

Heat exchanger device 1 'according to the prior art with three in the vertical Z superimposed heat exchangers 1a, 1b, 1c, the coats 301, 303, 305 are interconnected.

According to the invention, such an apparatus V according to FIGS. 2 and 3 is divided at least into a first and a second heat exchanger 1a, 1b, the first heat exchanger 1a or its tube bundle 2a and / or jacket 301 then being made is made of a different material or are as the second heat exchanger 1 b or its corresponding components (tube bundle 2b, 2c or coats 303, 305). 2, for example, the two upper heat exchangers 1 b, 1 c according to FIG. 1 form the second, now only two-storey, heat exchanger 1 b, the lowest heat exchanger a of FIG

Heat exchanger 1a according to Figure 2 forms. Possible combinations of materials for the two heat exchangers 1a, 1b according to FIG. 2 or their components 2a, 2b, 2c or 301, 302, 305 are given above. Alternatively, according to FIG. 3, the function of the two lower heat exchangers 1a, 1b of FIG. 1 can be transferred to the second heat exchanger 1b according to FIG.

The individual heat exchangers 1a, 1b, 1c according to FIGS. 2 and 3 are preferably wound heat exchangers, in which the tubes 3 of the respective tube bundle 2a, 2b, 2c are preferably wound around a core tube 4 according to FIG.

Furthermore, Figure 4 shows a schematic sectional view of another

This heat exchanger has three superimposed heat exchanger, namely along the vertical Z from bottom to top a first, a second and a third heat exchanger 1a, 1 b, 1 c, each with a separate jacket 301, 303, 305, respectively an assigned one

Enclosing space 201, 203, 205 include. The heat exchangers 1a, 1b, 1c can in principle also be arranged laterally offset from one another and do not necessarily have to be arranged vertically one above the other.

The three shells 301, 303, 305 are formed substantially hollow cylindrical and have corresponding to a longitudinal axis (cylinder axis), which is parallel to the vertical Z (based on a properly arranged

Heat exchanger device 1). The shells 301, 303, 305 further comprise a circumferential wall and a ceiling and a floor, which along the

Vertical Z face each other and complete the respective coat up or down. In the individual jackets 301, 303, 305 or shell spaces 201, 203, 205, a wound tube bundle 2a, 2b, 2c is arranged, each having a plurality of tubes which are wound around a core tube (see FIG. According to the invention, at least one of the tube bundles 2a, 2b, 2c or its tubes is made of a different material than the other tube bundles. In this case, all tube bundles 2a, 2b, 2c can be made of different materials. The materials of the tube bundles may be the materials described above.

Furthermore, additionally or alternatively, at least one of the jackets 301, 303, 305 may be made of a different material than the other jackets. This jacket can be made of the same material as the above-mentioned or associated tube bundle 2a or 2b or 2c.

Furthermore, all tube bundles 2a, 2b, 2c and / or shells 301, 303, 305 may each be made of a different material. The coats 301, 303, 305 belonging to the respective tube bundle 2a, 2b, 2c can each be made of the same material as the tube bundle 2a, 2b, 2c arranged therein.

In principle, at least one of the heat exchangers 1a, 1b, 1c can be made entirely of a different material than the other heat exchangers. Furthermore, all heat exchangers 1a, 1b, 1c can each be made of a different material than the respective other two heat exchangers.

Said tube bundles 2a, 2b, 2c form a first, a second and a third in the lowermost first jacket 301 as well as in the middle second jacket 303

Pipe space portion 101, 121, 111 and 103, 123, 124 and in the upper third shell 305 a first and a second pipe space portion 105, 127 from. Here, the individual tube space sections 101, 121, 111 or 103, 123, 124 and 105, 127 may be formed by groups of tubes of the respective tube bundle 2a, 2b, 2c.

The first tube space sections 101, 103 and 105 of the first, second and third shells 301, 303, 305 serve to receive a first medium M in the form of a hydrocarbon-rich phase to be liquefied, which passes through a first inlet E in FIG a lower part (especially bottom) of the first shell 301 is fed into the heat exchanger system 1 and flows upwards along the vertical Z. In this case, a spacing between the sheaths 301, 303, 305 is bridged by tube space section connecting means 102, 104 in the form of pipes, so that a continuous tube space is formed, which extends along the vertical Z through the three separate shells 301, 303, 305.

When passing through this tube space, the first medium M is cooled in several steps in the region of the first jacket 301, liquefied in the region of the second jacket 303 and undercooled in the region of the third jacket 305. The liquefied phase M can then be discharged from the heat exchanger device 1 via a first outlet A at an upper part of the third jacket 305 (in particular a cover).

In the other tube space sections 121, 111 and 123, 124 and 127, the second medium K (eg mixed refrigerant) is guided upwards along the vertical Z and introduced respectively at upper ends of the coats into the respective jacket spaces, so that the second medium K in the jacket spaces 301, 303, 305 along the vertical Z can flow down. For this purpose, the separate shells 301, 303, 305 are connected to each other via a first and a second jacket space connecting means 202, 204.

In order to liquefy the first medium M, the first medium M and the second medium K are conducted in cross-countercurrent to the second medium K flowing downwards in the jacket chambers 301, 303, 305. The cold end of the

Heat exchanger system 1 is thus at the upper end (third jacket 305). The second medium K can be withdrawn from the sump of the first jacket 301 via a second outlet A of the first jacket 301 and separated into a liquid and a gaseous fraction in order to separate them individually

Heat supply device 1 to be able to supply. For this purpose, the second medium K withdrawn from the sump of the first jacket 301 can be fed to a compressor (not shown). The compressor can have two compression levels. The compressed in the first compression stage second medium K (for example, refrigerant mixture) can be partially condensed in an aftercooler or heat exchanger against ambient air or water and fed to a first separator in which a

Separation into a gaseous and a liquid fraction takes place. The gaseous fraction is fed to the second compressor stage and in this on the compacted desired final pressure. Also, the second compression stage is followed by an aftercooler or heat exchanger, in which the compressed first medium K is preferably cooled against ambient air or water and then fed to a further second separator.

From the bottom of said first separator, the liquid fraction of the first medium K is then withdrawn, fed via a second inlet E 'at the lower end of the first shell 301 in the second tube space portion 111 of the first shell 301 and guided along the vertical Z upwards and then introduced at an upper end of the first shell 301 under relaxation in the first shell space 201, so that the liquid fraction of the first medium K in the first

Jacket space 201 can flow down and thereby can enter into indirect heat exchange with the first medium M, which flows through the first tube space portion 101 upwards (and with the second medium K in the third tube space portion 121 of the first shell 301). Furthermore, through a third inlet E "at the lower end of the first jacket 301, the (from the head of the second separator

withdrawn) gaseous fraction of the second medium K in the third

Pipe space portion 121 of the first shell 301 introduced and guided along the vertical Z upwards. As a result, a pre-cooling of the first medium M can thus be carried out in the first jacket 301.

The second medium K flowing upward in the third tube space section 121 is led out of the first jacket 301 from a first outlet 122a at the upper end of the first jacket 301 and separated with respect to liquid and gaseous fractions. For this purpose, the second medium K can be supplied via the first outlet 122a to a third separator (not shown). A gaseous fraction withdrawn via the head of the third separator is then introduced into the second tube space section 123 of the second jacket 303 via a first inlet 122b at the lower end of the second jacket 303, whereas a liquid fraction K withdrawn from the sump of the third separator is introduced via a second Inlet 122c at the lower end of the second shell 303 is introduced into the third tube space portion 124 of the second shell 303 and is introduced at the upper end of the second shell 303 under relaxation in the second shell space 203, so that the liquid fraction along the vertical Z down to first jacket 301 can flow, and it is in particular in indirect heat exchange with the first medium M in the first tube space portion 103 of the second jacket 303 (as well as the second medium K in the second tube space portion 123 of the second jacket 303). Of

Furthermore, the gaseous fraction of the second medium K is guided via the second tube space section 123 and via a third tube space section connecting means 126 into the second tube space section 127 of the uppermost third jacket 305. As a result, a further cooling / liquefaction of the first medium M can be achieved in the second jacket 303.

Finally, in the third jacket 305, a subcooling of the first medium M by the guided in the second tube space portion 127 of the third jacket 305 second medium K is introduced at an upper end of the third jacket 305 in the third jacket space 205 under relaxation (gaseous fraction) and along the vertical Z in the third shell space 305 is directed downwards. In this case, the second medium K enters into indirect heat exchange with the first medium M guided in the first tube space section 105 of the third jacket 305, as a result of which subcooling of the liquefied first medium M is achieved.

Of course, it is of course also possible to combine adjacent shells 301, 303 or 303, 305. Thus, for example, in the present case, the first with the second or the second with the third sheath 301, 303 or 303, 305 form a uniform shell, so that there are only two separate shells. These configurations are also generally described in Figures 2 and 3 (see above).

In principle, the first, second and third heat exchangers 1 a, 1 b, 1 c, which are described in FIGS. 1 to 4, according to FIG. 5, may be wound heat exchangers 1 a, 1 b, 1 c. In this case, tubes 3 of the respective tube bundle 2 a, 2 b, 2 c are wound on a core tube 4 that carries these tubes 3. The tubes 3 of individual layers of pipe abut each other via spacers or webs 5. Preferably, the tubes 3 of at least one or some of the tube bundles 2a, 2b, 2c and the said webs 5 between such tubes 3 may be made of a stainless steel. The web width (in this case the dimension perpendicular to the sheet plane of FIG. 5) can be in the range of 10 mm to 30 mm, for example. The web height H is in particular in a range of 2 to 32 mm, preferably in the range of 4 to 20 mm. The tubes 3 of the tube bundles 2a, 2b, 2c may have an outer diameter D in the range of 3 to 35 mm, preferably 8 to 25 mm, with wall thicknesses S in the range of 0.3 to 5 mm, preferably 0.5 to 2 mm.

LIST OF REFERENCE NUMBERS

1, r heat exchanger device

1a First heat exchanger

1 b Second heat exchanger

1c Third heat exchanger

2a First tube bundle

2b Second tube bundle

2c Third tube bundle

3 pipes

Core raw r

5 footbridge

101 First pipe space section

102 First pipe space connection means

103 First pipe section

104 second pipe space connection means

105 First pipe space section

1 11 Second pipe section

121 Third pipe section

122a First outlet

122b First inlet

122c Second inlet

123 Second pipe section

124 Third pipe section

126 Third pipe space connection means

127 Second pipe section

01 First mantle room

02 First jacket space connection means

03 Second jacket space

04 Second shell space connection means 05 Third shell space

301 First coat

303 Second coat

305 Third coat

201a Lower first mantle space 201 b Upper first mantle space

301a Lower first coat

301 b Upper first coat

101a Lower section

101 b Upper section

1 11a Lower section

111 b Upper section

121a Lower section

121 b Upper section

1 11c Fourth pipe space connection means

121c Fifth pipe space connection means

211 Third jacket space connecting means

101c Third outlet

101d Fourth inlet

A first outlet

A 'second outlet

E First inlet

E 'Second inlet

E "Third entry

M First medium

K second medium

Z vertical

H height

D diameter

S wall thickness

Claims

claims

Heat exchanger device (1), with:

a first heat exchanger (1a) having a first jacket (301)

which surrounds a first jacket space (201), wherein the first heat exchanger (1a) further comprises a first tube bundle (2a) arranged in the first jacket space (201) such that a medium flowing in the first tube bundle (2a) can exchange heat indirectly with a medium flowing in the first jacket space (201) of the first heat exchanger (1a),

a second heat exchanger (1 b) having a second jacket (303) surrounding a second jacket space (203), wherein the second heat exchanger (1b) further comprises at least one second tube bundle (2b) arranged in the second jacket space ( 203), so that a medium flowing in the at least one second tube bundle (2b) can indirectly exchange heat with a medium flowing in the second jacket space (203), and wherein

the at least one first and the at least one second tube bundle (2a, 2b) are in fluid communication with one another, characterized in that the at least one first tube bundle (2a) is made of a different material or has a different material than the at least one second tube bundle (FIG. 2b) and / or that the first jacket (301) is made of a different material or has a different material than the second jacket (303).

Heat exchanger device according to claim 1, characterized in that the first and the second heat exchanger (1a, 1b) are formed separately from each other and spaced from each other.

Heat exchanger device according to claim 1 or 2, characterized in that the second heat exchanger (1 b) is formed as a two-story heat exchanger, and a further third tube bundle (2c), in an associated third jacket space (205) of the second heat exchanger (1 b ) is arranged above the second tube bundle (2b), so that in the third tube bundle (2c) flowing medium with a medium in the third jacket space (205) flowing medium can exchange heat indirectly.

Heat exchanger device according to claim 1 or 2, characterized

characterized in that the heat transfer device (1) has a third heat exchanger (1c) which has a third jacket (305) surrounding a third jacket space (205), wherein the third heat exchanger (1c) further comprises at least a third tube bundle (2c) disposed in the third jacket space (205) such that a medium flowing in the third tube bundle (2c) has one in the third jacket space (205) of the third

Heat exchanger (1c) flowing medium can exchange heat indirectly.

Heat exchanger device according to claim 3 or 4, characterized

in that the third tube bundle (2c) is made of a different material or has a different material than the first and / or the second tube bundle (2a, 2b) and / or that the third jacket (305) is made of a different material or a different material than the first and / or the second sheath (301, 303).

Heat exchanger device according to claim 3 or 4, characterized

in that the third tube bundle (2c) is made of the same material as the first tube bundle (2a) or the second tube bundle (2b) and / or that the third jacket (305) is made of the same material as the first jacket ( 301) or the second jacket (303).

Heat transfer device according to claim 4 or claim 5 or 6 as far back referring to claim 4, characterized in that the first, the second and the third heat exchanger (1a, 1b, 1c) are formed separately from each other and spaced from each other.

Heat exchanger device according to one of the preceding claims, characterized in that the first, the second or the third

Tube bundle (2a, 2b, 2c) is formed of or comprises one of the following materials: an aluminum alloy, steel, stainless steel, carbon steel, nickel steel.

9. Heat exchanger device according to one of the preceding claims, characterized in that the first, the second or the third sheath (301, 303, 305) is formed of or comprises one of the following materials: an aluminum alloy, steel, stainless steel, carbon steel,

Nickel steel.

10. Heat exchanger device according to one of the preceding claims, characterized in that the first, the second and / or the third heat exchanger (1 a, 1 b, 1 c) is in each case formed as a coiled heat exchanger or are, wherein the respective tube bundle (2 a, 2 b, 2c) is wound on a core tube (4) of the respective heat exchanger (1a, 1b, 1c) carrying the load of the respective tube bundle (2a, 2b, 2c).