EP1559981A2 - Heat exchanger with round profiled heat exchange plates - Google Patents

Abstract

Heat exchanger comprises a plate packet (1) delimited by a packet tension plate (3, 3a) with openings (20, 20a) having a diameter which is larger than the diameter of the plate packet. The plate packet is tensioned by four tension bolts (4) which run on the periphery of the heat exchanger plates and are welded to the packet tension plates. The tension bolts are positioned in the edge region of an opening angle on the casing side. The regions between the tension bolts lying outside the opening angle are each covered with a side metal sheet. Preferred Features: The packet tension plates are offset in the region between the tension bolts equal to the diameter of the plate packet.

Description

The invention relates to a heat exchanger from round profiled heat transfer plates with passages for heat transfer between media of a same or different state of matter, consisting from a disk pack that consists of at least two assembled heat transfer plate pairs formed which is made up of two each at the flow openings gas-tight welded heat transfer plates exist and two closure plates with passages for a medium flowing through the plate pack, the the joined heat transfer plate pairs limit on both sides, with the adjacent ones Heat transfer plate pairs and the limiting closure plates on the outer periphery to an independent Pressure chamber are gas-tight welded and one pressure stable housing with shell side arranged Passage openings for a second medium, which is the Plate package flows through the jacket side, and the front side Passage openings with connection piece, which with the Passage openings of the closure plates welded are.

In such heat exchangers is known, the shell-side supply of the second medium into the interior of the cylindrical housing very problematic to on the one hand, a bypass flow between the plate pack and the inner wall of the cylindrical housing largely or even completely avoid the efficiency of the Heat exchanger would significantly reduce and the other to form a shell-side inflow region, the maximum possible and uniform admission the designed heat transfer surface of the Ensures plate packs with the incoming jacket medium.

To avoid a bypass as possible, it is known between the outer periphery of the disk pack and the Housing interior adaptable Dürchflußleitbleche provide the rubber seals against the outer surface of the plate pack and against the inner surface Press the housing of the heat exchanger to access this Make the inflow region with respect to the remaining lateral surface to seal the plate pack. rubber seals can be brittle under thermal conditions be and break and thus lead to leaks and to others are rubber seals not for all applications suitable, such as for high-pressure and High temperature areas where such heat exchanger preferred come into use.

From WO 02/16852 A1, a heat exchanger of the type mentioned is known, in which at the periphery of the plate package Durchflußführungen for the shell side inflowing heat transfer medium are provided which have an inner tube structure of the housing and are partially in communication with the plate package, at least two of the flow guides are arranged with an inner tube structure opposite to the plate pack, which are supported against the inner wall of the surrounding housing. The portions of the flow guides having an inner tube structure and forming the inflow and outflow regions are connected to tubes which engage the inlet and outlet ports of the surrounding housing, at least one of the tubes being leak-proof against the inner wall of the inlet and / or Outlet neck is sealed metallic.
Although a bypass-side inflow region formed in this way can prevent a bypass between the inner wall of the housing and the plate pack, for use in the high-pressure region it is necessary for the regions of the flow guides which communicate with the periphery of the plate pack to be counteracted by additional measures the housing inner wall are supported in order to achieve a corresponding pressure stability of the heat exchanger. WO 02/16852 proposes, for example, that these areas are additionally filled with a non-flowing heat transfer medium. In addition, thus produced flow guides for the shell-side inflow, due to their compact design, not economically variable to each use and power range are adapted to create in this way the condition that for each intended application always the maximum flow conditions in the shell-side inflow of Heat exchanger prevail, which are known to be necessary for a uniform flow of the plate pack and thus for optimal use of the designed heat transfer surface of the plate pack. If this goal is to be achieved with the flow guides according to WO 02/16852, case-related flow guides must therefore be produced for each intended application. The production of case-related flow guides but is technically complex and therefore expensive.

From EP 07 60 078 B1 is a plate heat exchanger known, consisting of several composite disk modules which is spaced in a frame between Frame plates clamped by means of clamping screws and at which the outer most adjacent to one Heat exchange plate of adjacent modules around the passages are welded around. One such trained plate heat exchanger is for the high-pressure area and for the shell-side flow of the disk pack not suitable.

From EP 08 68 642 B1 is a plate heat exchanger known in which the abutted profiled Heat transfer plates with the through holes through Soldering permanently connected to a plate package. The plates are provided with at least one opening, in the soldered plate package a fastener channel form, through which a clamping screw for fixing the plate heat exchanger to a support element or a mounting plate, wherein the clamping screw at the same time for clamping the soldered Plate packs is used to pressure differences occurring intercept. Such a trained plate heat exchanger is also for the high pressure area and in a temperature range of -200 ° to + 900 ° completely unsuitable. But also a shell-side influx of a medium is due to the fully soldered execution not possible.

Object of the present invention is therefore, the Improve the heat exchanger mentioned above, that the heat exchanger is sealed as a metallic and wear-free compact heat exchanger for the high pressure area and for a temperature range of - 200 ° C to + 900 ° C cost-effective for the intended Purpose of prefabricated standard modules produced is designed and fluidically so can that the designed heat transfer surface at jacket-side influx of the plate package maximum for the heat transfer is used.

• das Plattenpaket beiderseits durch eine Paketspannplatte mit Durchtrittsöffnungen begrenzt ist, die einen Durchmesser aufweist, der größer als der Durchmesser des Plattenpakets ist und der dem Innendurchmesser des Gehäusemantels angepaßt ist;
• das Plattenpaket durch mindestens vier Spannbolzen verspannt ist, die an der Peripherie der Wärmeübertragungsplatten verlaufen und mit den Paketspannplatten verschweißt sind;
• die Spannbolzen im Randbereich eines vorbestimmten mantelseitigen Öffnungswinkel positioniert sind, an die bei einem mehrpässigen Plattenpaket zusätzlich ein oder mehrere Mantelabtrennungen festgelegt sind;
• die Bereiche zwischen den Spannbolzen, die außerhalb des Öffnungswinkels liegen, durch jeweils ein Seitenblech überdeckt sind, die an den angrenzenden Spannbolzen festgelegt sind und eine Form aufweisen, die der Peripherie der Wärmeübertragungsplatten des Plattenpakets angepaßt ist;
• die Seitenbleche an den Enden mit U-förmigen Abwinklungen ausgebildet sind, die sich dichtend gegen den Innendurchmesser des Gehäusemantels abstützen;
• die mantelseitigen Öffnungswinkel gegenüber den Bereichen des Plattenpakets, die von den Seitenblechen überdeckt sind, durch eine metallische Abdichtung abgedichtet sind;
• das Plattenpaket über die U-förmigen Abwinklungen der Seitenbleche im Gehäusemantel lagestabil eingelagert ist und der Gehäusemantel durch Endplatten mit Anschlußstutzen, die gleichzeitig das Plattenpaket seitlich im Gehäuse fixieren, metallisch gasdicht verschlossen ist.

This object is achieved in that

• the plate pack is bounded on both sides by a clamping plate with through openings, which has a diameter which is greater than the diameter of the plate pack and which is adapted to the inner diameter of the housing shell;
• the plate pack is braced by at least four clamping bolts which run on the periphery of the heat transfer plates and are welded to the package clamping plates;
• the clamping bolts are positioned in the edge region of a predetermined shell-side opening angle, to which one or more jacket partitions are additionally fixed in the case of a multipass board package;
• the areas between the clamping bolts, which are outside the opening angle, are covered by a respective side plate, which are fixed to the adjacent clamping bolt and have a shape which is adapted to the periphery of the heat transfer plates of the plate pack;
• the side panels are formed at the ends with U-shaped bends, which are sealingly supported against the inner diameter of the housing shell;
• the shell-side opening angles to the areas of the plate pack, which are covered by the side plates, sealed by a metallic seal;
• the plate pack is stored in a stable position on the U-shaped bends of the side plates in the housing shell and the housing shell is closed by metal gas-tight end plates with connecting pieces which simultaneously fix the plate pack laterally in the housing.

The inventive feature combination is the prerequisite created that the heat exchanger cost from prefabricated standard assemblies as metallic sealed and wear-free compact heat exchanger both in a fully welded embodiment as well as with a metallically sealed housing can be carried out for a wide industrial Application, such as for refrigeration and air conditioning, Power plant technology, building services, chem. process technology etc., at an operating temperature of - 200 ° C up to + 900 ° C can be used without interference. Through the package clamping plates, the plate package, the from gas-tight welded heat transfer plate pairs and closing plates, both sides limit and welded together by the clamping bolts are, both the pressure inside the plate pack as well as the shell-side pressure by the incoming Medium and possible pressure surges due to short-term Increases in pressure over the package clamping plates and the Clamping bolt added. Consequently, the connecting ones are and sealing welds between the heat transfer plates and the closure sheets substantially relieved of pressure, so that leakage by bursting the Welds due to the permanent pressure load in the Plate pack or a possible pressure increase, for example by inevitable pressure shocks, even then can be excluded if the heat exchanger used in the high pressure area.

By the design of the opening angle of the shell side Inflow area via the positioning of the Clamping bolts on the package clamping plate, which is the inflow area limit and the metallically sealed Overlapping the remaining periphery of the disk pack by means of the side plates, the condition is given that the shell-side inflow region in the Production of a heat exchanger very inexpensive the most optimal flow conditions of the jacket medium can be adapted for the predetermined application a uniform shell-side flow of the Disk packs and thus maximum use of the designed Ensure heat transfer surface. Furthermore, by the tension of the plate package by means of the clamping bolt in conjunction with the U-shaped Angling the ends of the overlapping side panels, the after mounting against the inner diameter of the housing shell sealingly support, also the assembly of the Heat exchanger very simplified and thus very cost-effective be performed. Rather, with the metallic sealing support of the U-shaped bends the side plates against the inner diameter of the housing shell At the same time the shell-side bypass is prevented and the plate package itself stable in the housing shell positioned.

According to a preferred embodiment of the invention the metallic seal of the shell-side opening angle executed with a gauzy metal fabric, in the area between the clamping bolts and under the Side panels in strips in the gaps between adjacent Heat transfer plate pairs inserted sealingly is. In this way, the shell-side bypass effectively counteracted at the periphery of the disk pack and the sealing with a thermal and be carried out chemically highly resistant sealing material, which is clearly fixed in position by the side plates is.

According to another preferred embodiment of Invention are the sealed areas between the Clamping bolts opposite the shell-side opening angles each evacuated by a comb plate, in the columns used adjacent heat transfer plate pairs and over the length of the clamping bolt on the clamping bolt is fixed and against the inner wall of the Housing jacket supports. Advantageously, these have Combs a comb shape on the contour of the columns matched between the heat transfer plate pairs is. With these comb plates on the one hand the seal the sealed columns between each two adjacent ones Heat transfer plate pairs in addition supported and inserted in the columns metallic Seal against the inflow clearly held in the predetermined position so that a shell-side bypass at the periphery of the plate package can be effectively prevented even if that On the shell side inflowing medium is gaseous and the others may be at a suitably designed width the combs an additional support of the plate package be created against the inner wall of the housing shell and thus the positional stability of the plate pack in the housing shell get supported.

According to another preferred embodiment of the invention are the plywood in the area between the clamping bolt, which is covered by the side plates are close to the diameter of the plate package discontinued.

In this way, the side panels after inserting the metallic seals in the columns of adjacent heat transfer plate pairs on the side the remote part of the package clamping plates and also the at the clamping bolt adjacent ridges clearly in front of the Welding fixed and fixed.

According to another preferred embodiment of the invention each of the side plates consists of two partial side plates, wherein one of the partial side plates is a straight-running End, that of the other Partial side sheet is partially covered over the area, with a Z-shaped end is provided, which is supported against the inner diameter of the housing shell. With the two-part design of the side plates and the proposed arrangement in the covered peripheral area the plate package and the Z-shaped training the free end of one of the two partial side plates, the is supported against the inner diameter of the housing shell, is the inserted metallic seal in completely covered peripheral area of the disk pack covered and stably positioned and thus a Jacketed bypass prevented. Furthermore, it is so created the condition that due to the two-part Version of the side panels the width changeable is, making it easy to adjust the side panels to be covered on the surface during assembly can. Consequently, the shell-side opening angle of Inflow area exclusively by the changed Positioning of the limiting clamping bolts on the clamping plates in the production exactly to the intended Purpose of the heat exchanger adapted be that a maximum flow through the jacket medium takes place and the designed heat transfer surface of the plate package optimal for heat transfer is being used.

The service-free design of the heat exchanger makes it is possible that advantageously the housing shell is welded to the end plates. This way you can a fully welded gas-tight compact heat exchanger be made available at the leaks and Leaks can be completely ruled out.

Of course, if necessary, one of the end plates welded to the housing shell and one of the End plates gas-tight releasably connected to the housing shell be. In this case, however, it is recommended that the detachable connection of the end plate with the housing shell is metallically sealed.

Further details of the invention will become apparent from the following detailed description and attached Drawings in which preferred embodiments are illustrated.

Fig. 1:

eine schematische Darstellung eines vollverschweißten Wärmeübertragers mit zwei plattenseitigen Anschlußstutzen und zwei Mantelstutzen;

Fig. 2:

eine schematische Darstellung eines teilweise geschnittenen Plattenpakets mit Spannbolzen und Anschlußplatte in der Vorderansicht;

Fig. 3:

einen schematisch dargestellten Schnitt A-A von Fig. 1;

Fig. 4:

eine schematische Darstellung einer teilweise ausgebrochenen Ansicht B von Fig. 3;

Fig. 5:

eine schematische Darstellung einer Paketspannplatte in der Seitenansicht mit einem geschlossenen Seitenblech und einem zweiteilig ausgeführten Seitenblech.

In the drawings show:

Fig. 1:

a schematic representation of a fully welded heat exchanger with two plate-side connecting piece and two mantle pieces;

Fig. 2:

a schematic representation of a partially cut plate pack with clamping bolt and connection plate in front view;

3:

a schematically illustrated section AA of Fig. 1;

4:

a schematic representation of a partially broken view B of Fig. 3;

Fig. 5:

a schematic representation of a package clamping plate in the side view with a closed side plate and a two-part side plate.

The heat exchanger consists essentially of a Plate package 1 with closure plates 19, 19a, the package clamping plates 3, 3a, the clamping bolt 4 - 4x, the side plates 6, 6a or the partial side plates 6b, 6c and 6d, 6e, the combs 5 - 5c, the metallic seals 11 and the housing shell 12 with the two end plates 13, 13a and at least two fixed to the housing shell 12 Sheath 14, 14a and at least two to the End plates 13, 13a fixed plate-side connecting piece 23, 23a.

The housing 21 is in the illustrated embodiment a fully welded pressure vessel, the out of the housing shell 12 and the two end plates 13; 13a with passages 25; 25a is formed on the perimeter gas-tight welded to the housing shell 12. At the passage opening 25 of the end plate 13 is the plate-side Connecting piece 23 and at the passage opening 25a of the end plate 13a of the plate-side connecting piece 23a provided, each of the end plates 13; 13a and the package clamping plate 3, 3a penetrate and am Circumference with the end plate 13; 13a are connected.

On the housing shell 12 are shell-side passage openings 15; 15a provided, to which the jacket pipe 14; 14a are welded gas-tight for the jacket medium.

The plate pack 1 consists of a number of joined together round profiled heat transfer plates 2 - 2x, for the intended use thermally determined and from the closure plates 19, 19a, the plate pack 1 at the ends close.

The heat transfer plates 2 - 2x are on the perimeter of Passage openings to heat transfer plate pairs 16; 16a gas-tight welded and the adjacent each Heat transfer plate pairs 16; 16 are common with the closing closure plates 19; 19a at the outer periphery welded together gas-tight.

The closure plates 19; 19a are with passages formed, which together with the passages the heat transfer plates 2 - 2x the passageways 24; Form 24a through the plate pack 1. At the openings of the closure plates 19; 19a are the ends of the plate-side connecting piece 23, 23a gas-tight welded, which the package clamping plate 3; 3a and the end plate 13; 13 a of the housing 21 penetrate.

The plate pack 1 is on both sides by the package clamping plates 3; 3a with the passage openings 20; 20a limited, which are clamped by means of clamping bolts 4 - 4x. The clamping bolts 4 - 4x run adjacent to the periphery of the plate package 1 and are on both sides with package clamping plates 3; 3a under predetermined bias the plate pack with the package clamping plates 3; 3a welded.

As shown in Fig. 3, the clamping bolts 4, 4b and the clamping bolts 4a, 4c on the package clamping plates 3; 3a in the end portions of the opening angle α; α1 of the shell side Anströmungsbereichs of the plate pack 1 for the Sheath medium positioned. Thus, the shell side Opening angle α; α1 before welding the clamping bolts 4, 4b and 4a, 4c in a heat exchanger economically and individually to the designed performance and the fluidic conditions of the used Sheath medium adaptable. Consequently, this is the condition created that accordingly available standing lateral surface of the plate pack 1 evenly is acted upon by the jacket medium, so that each Heat exchangers are designed for its application can that the designed heat transfer surface of the plate package 1 is used optimally thermally.

The running at the periphery of the plate package 1 Clamping bolts 4d, 4e are 90 ° to the center of the opening angle α; α1 offset and the clamping bolts 4f - 4x lie in the range of the opening angle α, α1 and are with the Package clamping plates 3; 3a to further stabilize the Plate packs 1 welded. The clamping bolts 4f; 4x are rectangular in this particular case and serve at the same time for fixing the straight-running end 18 of the Partial side panel 6c; 6f on the periphery of the disk pack 1.

The areas on the periphery of the disk pack 1, the lie between the clamping bolt 4, 4b and 4a, 4c are opposite the opening angles α; α1 of the shell side Anströmbereichs sealed metal to a shell side Bypass on the periphery of the plate pack 1 to prevent. For this purpose, in columns 22 between each adjacent heat transfer plate pairs 16, 16a metallic seals 8 in strip form sealing inserted, which preferably from a gazeartigen Metal mesh exist and spread all over Range between the clamping bolts 4, 4b and 4a, 4c extend.

The metallic seals 8 are compared with the opening angles α; α1 of the shell-side Anströmbereichs by comb plates 5, 5a and 5b, 5c position stabilized positioned, which engage in the gaps 22 of the adjacent heat transfer plate pairs 16, 16a and extend over the length of the plate pack 1. These comb plates 5; 5a; 5b; 5c extend on the opposite side of the opening angle α; α1 parallel to the clamping bolt 4; 4a; 4b; 4c and 4c are on the clamping bolt; 4a; 4b; 4c welded.
Advantageously, the combs of the comb plates 5; 5a; 5b; 5 c formed with a contour corresponding to the shape of the columns 22. In order to support the comb plates 5 - 5c at the same time the sealing of the shell-side Anströmbereichs. Advantageously, the comb plates 5 - 5c are designed in a width which is supported on the inner wall of the housing 21 after installation of the heat exchanger. Thus, the pressure-stable position of the plate package 1 in the housing 21 can be additionally improved.

The area between the clamping bolts 4, 4b and 4a, 4c and over the length of the plate pack 1, with the inserted metallic seals 8 in the columns 22 is sealed by partial side plates 6b, 6c or 6d, 6e, as shown in Fig. 5 on the left side, or one-piece side panels 6; 6a, as in FIG. 5 shown on the right, covered at the respectively adjacent clamping bolt 4; 4a; 4b; 4c welded are and the metallic seals 8 in the columns 22 between the adjacent heat transfer plate pairs 16, 16a stable on the shell side even at high pressure position.

The at the clamping bolt 4; 4a; 4b; 4c adjacent end the side panels 6; 6a and the partial side plates 6b; 6c; 6d; 6e are with congruent U-shaped bends 7, 7a and 7b, 7c formed after assembly supported sealingly on the inner wall of the housing shell 12. By these U-shaped bends 7, 7a and 7b, 7c of the side panels 6, 6a or partial side panels 6b-6e the plate pack 1 is positioned stable in the housing 21 and pressure stabilized and at the same time are the metallic seals 8 in the columns 22 through the Side plates 6, 6a or partial side plates 6b - 6e pressurized and thus sealingly pressed into the gaps 22.

As shown in FIG. 3 and on the left side of FIG. 5, the partial side plates 6c and 6e are each with a straight end 18 formed by the clamping bolt 4f; 4x and partly from a partial side panel 6d; 6b, with a Z-shaped End 17 is provided, covered. The Z-shaped End 17 of the partial side panels 6d; 6b is here for Plate package 1 spaced so that it after the Mounting on the inner wall of the housing shell 12 sealing supports and thus another support point of the plate package 1 against the inner wall of the housing shell 12th trains the positional and pressure stability of the disk pack 1 further improved. With the training of Partial side plates 6d, 6e and 6b, 6c, namely the one the two cooperating partial side panels 6d; 6e or 6b; 6c has a straight end 18, the from the other partial side panel 6d; 6c and 6b, respectively; 6c covered is, are the partial side plates 6d, 6e and 6b, 6c individually to the area to be covered, by the selected opening angle α, α1 of the shell side Anströmbereichs is determined, adaptable.

As can be seen from FIG. 3 and indicated in FIG. 2, is the described embodiment of the heat exchanger designed to fit. For this purpose is in the Through passage 24a of the plate pack 1 a metallic Plate pass 9 and coat side a metallic jacket separation 10 used. The metallic jacket separation 10 is on the side facing the plate package 1 side slotted and on the junction of two heat transfer plate pairs 16, 16a and put on the inserted metallic seals 6 in the columns 22 of the adjacent heat transfer plate pairs 16, 16 a sealed at the periphery of the plate pack 1 and shell side opposite the inner wall of the housing shell 12 sealed with a metallic seal 11 established.

The invention proposed and completely metallic sealed heat exchanger is almost service-free and thus for the compact design in one fully welded design in high pressure and high temperature range suitable. But he can also by the special embodiment very economical from prefabricated Standard construction groups for each application individually for optimal use of the designed heat transfer surface be interpreted.

Claims (9)

Heat exchanger made of round profiled heat transfer plates with passages for heat transfer between media of the same or different physical state, consisting of a plate package formed of at least two joined heat transfer plate pairs, each consisting of two gas-tight welded to the flow pass heat transfer plates and two closure plates with openings for a medium flowing through the plate package medium, which limit the joined heat transfer plate pairs on both sides, wherein the respective adjacent heat transfer plate pairs and the limiting closure plates on the outer periphery are gas-tight welded to an independent pressure chamber and a pressure-stable housing with shell-side arranged passage openings for a second medium which druchströmt the plate package shell side and end-side passages with connecting pieces, which are welded to the passages of the closure plates, characterized in that the plate pack (1) on both sides by a package clamping plate (3 or 3a) with passage openings (20 or 20a) is limited, which has a diameter which is greater than the diameter of the plate pack (1) and the inner diameter of the housing shell (12 ) is adjusted; the plate pack (1) is braced by at least four clamping bolts (4 - 4x) which run on the periphery of the heat transfer plates (2 - 2x) and are welded to the package clamping plates (3, 3a); the clamping bolts (4, 4a or 4b, 4c) are positioned in the edge region of a predetermined shell-side opening angle (α; α1) to which one or more shell partitions (10) are additionally fixed in the case of a multipass board package (1); the areas between the clamping bolts (4, 4b and 4a, 4c) are each covered by a side plate (6 or 6a) which are fixed to the adjoining clamping bolts (4, 4b, 4a, 4c) and have a shape corresponding to that of FIG Periphery of the heat transfer plates (2 - 2x) of the plate pack (1) is adapted; the side plates (6; 6a) are formed at the ends with U-shaped angled portions (7, 7a) which bear sealingly against the inner diameter of the housing shell (12); the shell-side opening angles (α, α1) are sealed off from the areas of the plate pack (1) which are covered by the side plates (6; 6a) by a metallic seal (8); the plate pack (1) via the U-shaped angled portions (7, 7a) of the side plates (6, 6a) in the housing casing (12) is stored stable position and the housing shell (12) by end plates (13 or 13a) with connecting pieces (23, 23a), which at the same time fix the plate pack (1) laterally in the housing (21), is closed in a metallic gas-tight manner. Heat exchanger according to claim 1, characterized in that the metallic seal (8) of the shell-side opening angle (α, α1) is a gauze-like metal fabric, which in the region between the clamping bolts (4; 4b; 4a; 4c) stripwise into the columns (22, 22). 22x) of adjacent heat transfer plate pairs (16-16x) sealingly inserted and covered by the side plates (6; 6a). Heat exchanger according to Claims 1 and 2, characterized in that the sealed areas between the clamping bolts (4, 4b; 4a, 4c) are evacuated in each case by a comb plate (5; 5a; 5b; 5c) in relation to the shell-side opening angles (α; inserted in the gaps (22-22x) of adjacent heat transfer plate pairs (16-16x) and fixed along the length of the clamping bolts (4; 4b; 4a; 4c) to the clamping bolts (4; 4b; 4a; 4c). Heat exchanger according to claim 3, characterized in that the comb plates (5, 5a, 5b, 5c) have a comb shape which is adapted to the contour of the gaps (22-22x) between the heat transfer plate pairs (16-16x). Heat exchanger according to one of claims 1 to 4, characterized in that the package clamping plates (3, 3a) in the region between the clamping bolts (4, 4b and 4a, 4c) are approximately offset to the diameter of the plate package (1). Heat exchanger according to one of claims 1 to 5, characterized in that the side plates (6; 6a) consist of two partial side plates (6b, 6c and 6d, 6e), one of the partial side plates (6b or 6c or 6d or 6e) straight expiring end (18) which is partially covered by the other part of the side sheet (6b or 6c or 6d or 6e), which is provided with a Z-shaped end (17) extending against the inner diameter of the housing shell ( 12) is supported. Heat exchanger according to one of claims 1 to 6, characterized in that the housing jacket (12) is welded to the end plates (13, 13a). Heat exchanger according to one of Claims 1 to 6, characterized in that one of the end plates (13; 13a) is welded to the housing jacket (12) and one of the end plates (13; 13a) is connected in a gas-tight detachable manner to the housing jacket (12). Heat exchanger according to claim 8, characterized in that the detachable connection of the end plate (13 or 13a) with the housing shell (12) is sealed metallic.

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