Plate heat exchanger arrangement

Abstract

A plate heat exchanger arrangement (1) comprising at least a first plate pack (2) and a second plate pack (3) arranged next to each other inside an outer casing, and the first plate pack (2) has a diameter larger than the diameter of the second plate pack (3) as defined by the outer edges of the heat exchanger plates.

Description

Technical Field

[0001] This invention relates to a plate heat exchanger arrangement according to the following description. The invention also relates to a modular structure comprising the plate heat exchanger arrangement according to the invention. Background Technology

[0002] A plate and shell type plate heat exchanger consists of a plate assembly formed by heat exchange plates and an outer shell surrounding it, which functions as a pressure vessel. The plate assembly comprises several plate pairs. Each plate pair typically consists of two heat exchange plates attached together at least at their periphery. Each heat exchange plate has at least two openings for the flow of the heat exchange medium. Adjacent plate pairs are attached to each other by attaching the openings of two adjacent plate pairs to each other. The internal portions of the plate pairs are arranged to be interconnected via flow paths formed by the openings in the heat exchange plates, wherein the main circuit of the heat exchanger is formed between the openings in the heat exchange plates. Auxiliary circuits are formed between connectors in the outer shell surrounding the plate assembly, and they are arranged to spatially connect with the plate pairs of the plate assembly. The heat exchange medium on the main side flows in every other plate space, and the heat exchange medium on the auxiliary side flows in every other plate space.

[0003] In some applications, there may be a need for several heat exchangers, but the space available for heat exchangers is limited, in which case it may be beneficial if the heat exchangers can be arranged as compactly as possible. Summary of the Invention

[0004] The objective of this invention is to provide a compact plate heat exchanger arrangement comprising at least two plate assemblies located inside the same common outer casing, and these plate assemblies having a common casing side.

[0005] Another objective of this invention is to provide a plate heat exchanger arrangement that can be used as such a heat exchanger, but can also be utilized in a modular structure.

[0006] Furthermore, the objective of this invention is to provide a plate heat exchanger structure that is easy to manufacture.

[0007] A typical plate heat exchanger arrangement according to the present invention includes at least the following:

[0008] -First board group, and

[0009] -Second board group

[0010] The first and second plate groups are formed by heat exchange plates having at least two openings and arranged vertically to each other, and the heat exchange plates are attached to each other as a plate pair. The internal portions of the plate pair are arranged to be connected to each other via flow passages formed by the openings in the heat exchange plates, wherein the main circuit of the heat exchanger is formed between the openings in the heat exchange plates.

[0011] - A common outer shell surrounding the first and second plate groups, the outer shell comprising a longitudinal cylindrical shell and end plates disposed at both ends of the shell.

[0012] - The inlet and outlet connectors of the first plate group are connected to the flow path of the first plate group.

[0013] - The inlet and outlet connectors of the second plate assembly are connected to the flow path of the second plate assembly.

[0014] - Inlet and outlet connections for the heat exchange medium flowing inside the shell, these connections being arranged through the outer shell, wherein auxiliary circuits are formed between the connections of the outer shell arranged to spatially connect with the pairs of plates of the plate assembly.

[0015] Furthermore, the first and second plate groups in the heat exchanger arrangement have a common shell side for the heat exchange medium flowing inside the shell, and

[0016] In this plate heat exchanger arrangement, the first plate group and the second plate group are arranged adjacent to each other inside a common outer casing, and the first plate group has a diameter that is larger than the diameter of the second plate group, defined by the outer edge of the heat exchange plate.

[0017] In a typical plate heat exchanger arrangement according to the invention, at least two plate groups with different diameters, defined by the outer edges of the heat exchange plates of the plate group, are arranged adjacent to each other inside the same common outer casing. This arrangement provides more space for arranging the inlet and / or outlet connections of the plate groups through the same end plate of the outer casing. Furthermore, when two or more plate groups are arranged inside the same common outer casing, they can divide a common shell side in the heat exchanger arrangement. These are advantageous constructions if space available for multiple heat exchangers is limited. In a typical embodiment according to the invention, the shell side is common to all plate groups in the arrangement. The shell side can be constructed simply without complex structures; for example, this simplifies the piping required for the heat exchanger arrangement according to the invention.

[0018] A typical modular structure according to the invention includes at least two modules arranged inside the same outer housing, the modules being separated from each other by partition walls, and at least one module being formed by a plate heat exchanger according to the invention comprising at least two plate groups.

[0019] According to an embodiment of the invention, the arrangement according to the invention provides a fully welded plate heat exchanger arrangement that does not affect the pressure tightness of the heat exchanger. Attached Figure Description

[0020] The invention will be described in more detail with reference to the accompanying drawings, in which...

[0021] Figure 1 An arrangement of a plate heat exchanger according to an embodiment of the present invention is shown, wherein two plate groups are arranged inside the same common outer casing.

[0022] Figure 2 A plate heat exchanger arrangement according to another embodiment of the invention is shown, wherein two plate groups are arranged inside the same common outer housing, and

[0023] Figure 3 This is a plate heat exchanger arrangement according to an embodiment of the present invention, wherein three plate groups are arranged inside the same common outer casing. Detailed Implementation

[0024] The plate heat exchanger arrangement according to the invention comprises at least two plate groups: a first plate group and a second plate group, and an outer shell surrounding them. The outer shell includes a shell and first and second end plates arranged at the ends of the shell. In a typical embodiment according to the invention, the shell is a generally horizontal cylindrical shell, and the end plates are vertical end plates. The longitudinal direction of the outer shell or cylindrical shell is the direction between the end plates of the outer shell, typically meaning the horizontal direction. If the cylindrical shell of the outer shell is a straight cylinder, its longitudinal direction is the same as the direction of the central axis of the cylinder under discussion.

[0025] In the plate heat exchanger arrangement according to the invention, a first plate group and a second plate group are formed by heat exchange plates having at least two openings and arranged vertically to each other. The plate group includes ends in the direction of the heat exchange plates and an outer surface defined by the outer edges of the heat exchange plates. In a preferred embodiment of the invention, the two ends of the plate group include separate support end plates. The plate group consists of several plate pairs. Each plate pair is typically formed by two heat exchange plates attached together at least at their peripheries. Each heat exchange plate has at least two openings for the flow of the heat exchange medium. Adjacent plate pairs are attached to each other by attaching the openings of two adjacent plate pairs to each other. The internal portions of the plate pair are arranged to be connected to each other via flow paths formed by the openings of the heat exchange plates. In the plate group, the heat exchange medium can flow from one plate pair to another via the openings. In embodiments according to the invention, the heat exchange plates are typically circular heat exchange plates, wherein the plate group is predominantly cylindrical in shape. The plate group can also be formed by, for example, semi-circular or elliptical heat exchange plates. The longitudinal direction of the plate group is the same as the longitudinal direction of the cylindrical shell.

[0026] A common outer shell surrounds plate assemblies arranged adjacent to each other inside the outer shell; preferably, a common cylindrical shell surrounds the plate assemblies. In embodiments of the invention, a first plate assembly and a second plate assembly are arranged adjacent to each other inside the same common outer shell, and the first plate assembly has a diameter defined by the outer edge of the heat exchange plate that is larger than the diameter of the second plate assembly.

[0027] In embodiments of the invention, at least one partition plate is arranged between a first plate group and a second plate group. In embodiments of the invention, the partition plate arranged between adjacent plate groups has a size at least corresponding to the size of the plate group having a larger diameter. In embodiments of the invention, the partition plate has a size in which the partition plate is connected from one edge to the inner surface of the outer shell. The partition plate between adjacent plate groups makes it possible to provide a compact configuration even when the plate groups have different sizes defined by the diameter of the heat exchange plates. In embodiments of the invention, the partition plate is arranged to extend from the outer surface of the plate group to the inner surface of the shell on one side of the plate group, and thus the partition plate forms a plurality of channels for the heat exchange medium in the common shell side of the heat exchanger.

[0028] According to an embodiment of the invention, the partition plate arranged between adjacent plate groups has a thickness of approximately 20 to 100 mm. The intermediate plate supports the structure of the plate group and improves its pressure resistance.

[0029] According to an embodiment of the invention, a plate heat exchanger arrangement further includes a third plate group, wherein three adjacent plate groups (a first plate group, a second plate group, and a third plate group) are arranged inside the same common outer casing. Like the first and second plate groups, the third plate group is also formed by heat exchange plates having at least two openings and arranged vertically to each other. The third plate group includes ends in the direction of the heat exchange plates and an outer surface defined by the outer edges of the heat exchange plates, and the heat exchange plates are attached to each other as a plate pair, the inner portions of which are arranged to be connected to each other via flow passages formed by the openings of the heat exchange plates. According to an embodiment of the invention, the three plate groups are arranged adjacent to each other inside the same common outer casing, and at least the first plate group has a diameter larger than that of the second and third plate groups. According to an embodiment of the invention, the third plate group has a diameter defined by the outer edges of the heat exchange plates that is at least smaller than the diameter of the first plate group. According to an embodiment of the invention, the third plate group has a diameter defined by the outer edges of the heat exchange plates that is smaller than the diameter of the first and second plate groups. The plate groups can be arranged adjacent to each other inside the outer casing in any order. According to the invention, at least one plate group has a diameter larger than that of the other plate groups. In an embodiment of the invention, all the plate groups arranged adjacent to each other have different diameters.

[0030] When the plate heat exchanger arrangement includes three plate groups, the plate heat exchanger arrangement may further include a second partition plate disposed between the third plate group and a plate group arranged adjacent to the third plate group. The partition plate corresponds to the partition plate between the first and second plate groups as defined above. The partition plate has a size at least corresponding to the size of the plate group having a larger diameter. In a typical embodiment, the partition plate has a size in which the partition plate is connected to the inner surface of the outer shell from one edge of the partition plate. In embodiments of the invention that include three plate groups adjacent to each other, intermediate plate groups are located between the partition plates, and these partition plates may further define flow channels for heat exchange media flowing inside the common shell side, i.e., these partition plates extend from the outer surface of the plate group to the inner surface of the shell on one side of the plate group. In embodiments of the invention, the shell side has a common inlet connection, and the shell side outlet connection is disposed into the space between these partition plates.

[0031] The plate heat exchanger arrangement according to the invention may also include more than three plate groups, wherein at least the first plate group has a larger diameter than the other plate groups. The invention is not limited to the arrangement described above, which includes two or three plate groups of different sizes. The plate heat exchanger arrangement may also include plate groups of similar sizes, but the invention is based on at least two plate groups of different sizes arranged adjacent to each other inside the same common outer casing, and thus provides more space to arrange the inlet / outlet connections of the larger diameter plate group and the inlet and outlet connections of the smaller diameter plate group to the same end plate of the outer casing.

[0032] The plate assembly according to the invention may include different numbers of plate pairs. The size of the plate assembly may be determined based on the requirements of the application.

[0033] The plate heat exchanger arrangement according to the invention includes inlet and outlet connections for each plate group, these connections being connected to the flow channels of the plate group. The main circuit of the plate group is thus formed between the inlet and outlet connections of the plate group portion. In the space between the plate pairs, inlet and outlet connections of auxiliary circuits are arranged via an outer housing to connect to the inside of the outer housing. Typically, the main and auxiliary circuits of the plate group are separate from each other, i.e., the heat exchange medium flowing in the inner portion of the plate group portion cannot mix with the heat exchange medium flowing in the outer housing, and cannot mix with the heat exchange medium flowing in the inner portion of another plate group portion.

[0034] In the plate heat exchanger arrangement of the present invention, the inlet and outlet connections of the first plate group are arranged to connect with the flow passage of the first plate group. The inlet and outlet connections include connecting pipes arranged to pass through the end plate of the outer housing and connect to the flow passage of the plate group. The inlet and outlet connections of the second plate group, arranged to connect with the flow passage of the second plate group, include connecting pipes arranged to pass through the end plate of the outer housing and connect to the flow passage of the plate group. Correspondingly, according to an embodiment of the present invention, the third plate group includes inlet and outlet connections, which include connecting pipes arranged to pass through the end plate of the outer housing and connect to the flow passage of the third plate group.

[0035] Adjacent plate assemblies with different outer diameters make it easy to arrange the inlet and / or outlet connections of the larger plate assembly through the same end plate of the outer housing as the inlet and outlet connections of the smaller plate assembly. According to embodiments of the invention, when the first plate assembly has a diameter defined by the outer edge of the heat exchange plate that is larger than the diameter of the second plate assembly, the inlet and / or outlet connections of the first plate assembly are arranged outside the outer surface of the second plate assembly, and / or when the second plate assembly has a diameter defined by the outer edge of the heat exchange plate that is larger than the diameter of the third plate assembly, the inlet and / or outlet connections of the second plate assembly are arranged outside the outer surface of the third plate assembly. In a preferred embodiment of the invention, the inlet and / or outlet connections of the first plate assembly and the outlet and inlet connections of the second plate assembly are arranged through the same end plate, wherein the first plate assembly has a diameter defined by the outer edge of the heat exchange plate that is larger than the diameter of the second plate assembly, and the inlet and / or outlet connections of the first plate assembly are arranged outside the outer surface of the second plate assembly. In addition, in the same manner, in embodiments of the invention that include three or more plate groups, the inlet connector and / or outlet connector of each plate group are preferably arranged through the same end plate.

[0036] According to an embodiment of the invention, the inlet and outlet connections of the plate assembly include connecting pipes, and they are nested, wherein the outer diameter of the inner connecting pipe is smaller than the diameter of the outer connecting pipe and the flow passage of the plate assembly. This allows the inlet and outlet connections of the plate assembly to be arranged through the same end plate of the outer housing, and provides a more compact structure. When the inlet and outlet connections are nested and connected to a flow passage of the plate assembly, the inlet connection of the plate assembly is formed by arranging the connecting pipe through the outlet connection of the plate assembly, wherein the inlet connection pipe extends inside the flow passage of the plate assembly, and the outlet connection pipe is attached to the end of the plate assembly to form a connection with the flow passage.

[0037] According to an embodiment of the invention, a plate heat exchanger arrangement provides a compact structure because the inlet and outlet connections of the plate assembly can be arranged through an end plate of the outer housing. This plate heat exchanger arrangement according to the invention can be formed with an openable end plate structure, and the plate assembly can be easily removed from the outer housing if required, for example, for cleaning.

[0038] In the plate heat exchanger arrangement of the present invention, the inlet and outlet connections for the heat exchange medium flowing inside the shell are arranged through the outer shell, typically through the shell of the outer shell. The inlet and outlet connections on the shell side may be arranged through end plates or through the shell, or any combination thereof. In a preferred embodiment of the invention, a single heat exchange medium flows inside the shell side of the plate heat exchanger arrangement, i.e., the shell side is common to all plate groups. According to an embodiment of the invention, when a partition plate between adjacent plate groups divides a portion of the shell into two separate sections at the edge of the outer shell, each section including its own outlet connection, the plate heat exchanger arrangement includes one inlet connection and two outlet connections for the heat exchange medium flowing in the shell side. In an embodiment of the invention, where the arrangement includes three plate groups and two partition plates, the plate heat exchanger arrangement may include one inlet connection and three outlet connections for the heat exchange medium flowing in the shell side, each section divided by the partition plate including its own outlet connection.

[0039] According to an embodiment of the invention, a separate stopper plate is disposed at least on one side of the plate assembly between the outer surface of the plate assembly and the inner surface of the shell to form multiple channels for heat exchange medium in the shell side of the heat exchanger. According to an embodiment of the invention, the stopper plate may be welded to a partition plate disposed between adjacent plate assemblies. In an embodiment, the stopper plate is substantially planar along the direction of the heat exchange plates and is disposed in the plate heat exchanger structure along the direction of the heat exchange plates of the plate assembly.

[0040] In the plate heat exchanger according to the invention, the heat exchange medium can be arranged to flow in a co-current, counter-current, or cross-current manner.

[0041] The plate heat exchanger arrangement according to the invention may be such a heat exchanger, or it may be part of a modular structure.

[0042] The modular structure according to the invention comprises at least two modules arranged inside the same outer housing, these modules being separated from each other by partition walls, and at least one module being formed by a plate heat exchanger arrangement according to the invention comprising at least two plate assemblies. In embodiments, the outer housing of the modules is continuous along the length of the modular structure. In the modular structure, the partition wall between the plate heat exchanger arrangement and adjacent modules is an end plate of the outer housing of the plate heat exchanger arrangement. The arrangement according to the invention provides a compact modular structure because at least two plate assemblies having heat exchange medium circulation can be arranged inside a single module portion. These types of structures can be advantageous when space is limited for heat exchanger applications.

[0043] Detailed description of the attached diagram

[0044] For clarity, the same reference numerals are used for corresponding parts in different embodiments.

[0045] Figure 1-3 The proposed plate heat exchanger arrangement 1 includes an outer shell formed by a generally horizontal cylindrical shell 4 and a generally vertical first end plate 5a and a second end plate 5b.

[0046] exist Figure 1 and Figure 2 In this assembly, the first plate group 2 and the second plate group 3 are arranged inside the same common outer casing. The first plate group 2 and the second plate group 3 are formed by heat exchange plates having two openings and arranged vertically to each other. In this assembly, the heat exchange plates are attached to each other as plate pairs, and the internal portions of these plate pairs are arranged to be connected to each other via flow passages 2a, 2b, 3a, 3b formed by the openings in the heat exchange plates. Each plate group includes several plate pairs. The number of plate pairs can vary, and the lengths of the plate groups along the longitudinal direction of the plate groups can differ from one another. The diameter of the first plate group 2, defined by the outer edges of the heat exchange plates, is larger than the diameter of the second plate group 3.

[0047] The first plate group 2 and the second plate group 3 are arranged adjacent to each other, and a partition plate 9 is arranged between the plate groups. As shown in the figure, the partition plate 9 has a size larger than that of the plate groups with larger diameters, such that the partition plate is connected to the inner surface of the outer shell from one edge of the partition plate, and thus the partition plate forms multiple channels for heat exchange medium in the shell side of the heat exchanger. Typically, the partition plate 9 is arranged over at least the entire area of ​​the plate groups with larger diameters.

[0048] exist Figure 1 In the first plate group 2, the inlet connector 6a and the outlet connector 6b are arranged through different end plates 5a and 5b of the outer casing. For example... Figure 1As shown, one of the outlet connectors 6b is arranged on the outer side of the outer surface of the second plate assembly 3, and therefore it can be easily arranged through the end plate 5b of the outer housing. Thus, the inlet connector 7a and outlet connector 7b of the second plate assembly 3, and the outlet connector 6b of the first plate assembly 2, are arranged through the same end plate 5b. It is possible that the inlet connector 6a and outlet connector 6b of the first plate assembly 2 are nested and the internal connecting pipe extends at least partially inside the flow channel 2b. Figure 1 (Not shown in the image). The heat exchange medium loop of the first plate group 2 is formed between the inlet connector 6a and the outlet connector 6b, and the flow direction can be arbitrary. Figure 1 In the second plate group 3, the heat exchange medium loop is formed between the inlet connector 7a and the outlet connector 7b, and the flow direction can be arbitrary.

[0049] exist Figure 2 In the first plate group 2, the inlet connector 6a and the outlet connector 6b are arranged to pass through the same end plate 5a. In the second plate group 3, the inlet connector 7a and the outlet connector 7b are arranged to pass through the other end plate 5b of the outer housing.

[0050] exist Figure 1 and 2 In this plate heat exchanger, the shell side includes an inlet connector 8a and two outlet connectors 8b and 8c. The shell side also includes two channels formed by partition plates 9 arranged between the plate groups.

[0051] exist Figure 3 In the proposed embodiment, the plate heat exchanger arrangement 1 includes three plate groups: a first plate group 2, a second plate group 3, and a third plate group 10. The diameter of the third plate group 10, defined by the outer edges of the heat exchange plates, is smaller than the diameters of the first plate group 2 and the second plate group 3. The diameter of the second plate group 3 is also smaller than the diameter of the first plate group 2. The plate groups are separated from each other by partition plates 9 and 11 arranged between them. Figure 3 As shown, the partition plates 9 and 11 extend to the inner surface of the outer shell at one edge of the partition plate and form multiple channels for the heat exchange medium in the shell side of the heat exchanger. The partition plates 9 and 11 cover the entire area of ​​the larger plate group to which they are connected. The heat exchange medium loop of the first plate group 2 is formed in conjunction with... Figure 1 Between inlet connector 6a and outlet connector 6b of the same type. The inlet connector 7a of the second plate group 3 is arranged inside the outlet connector 7b of the second plate group, wherein connectors 7a and 7b are nested and the inner connector 7a extends at least partially inside the flow channel 3b. Figure 3In the third plate assembly 10, the heat exchange medium loop is formed between the inlet connector 12a and the outlet connector 12b, and the flow direction can be arbitrary. The inlet connector 12a and the outlet connector 12b are connected to the flow channels 10a and 10b of the third plate assembly. Figure 3 In this configuration, when the first plate group has a diameter defined by the outer edge of the heat exchange plate that is larger than the diameter of the second plate group, one of the connectors of the first plate group 2 is arranged outside the outer surface of the second plate group 3. Furthermore, when the second plate group has a diameter defined by the outer edge of the heat exchange plate that is larger than the diameter of the third plate group, the inlet connector 7a and outlet connector 7b of the second plate group 3 are arranged outside the outer surface of the third plate group 10. Therefore, the inlet or outlet connectors of the first plate group 2, the outlet and inlet connectors of the second plate group 3, and the outlet and inlet connectors of the third plate group 10 are arranged through the same end plate 5b of the outer housing.

[0052] exist Figure 3 In this plate heat exchanger, the shell side includes one inlet connector 8a and three outlet connectors 8b, 8c, and 8d. The shell side includes three channels for the heat exchange medium flowing inside the shell, formed by partition plates 9 and 11 arranged between the plate groups. The outlet connectors 8b, 8c, and 8d connect to shell sections divided by the partition plates 9 and 11, each section including its own outlet connector.

[0053] In the figure, the first plate group 2 includes support end plates 13a and 13b at the ends of the plate group, the second plate group 3 includes support end plates 14a and 14b, and the third plate group 10 includes support end plates 15a and 15b.

[0054] Figure 1-3 The plate heat exchanger arrangements proposed in the paper can be configured in such a way that they are part of a modular structure. In a modular structure, Figure 1-3 The plate heat exchanger arrangement proposed in the paper can be a module of a modular structure, and the end plate 5a forms a partition wall between the arrangement and the second module of the modular structure.

Claims

1. A plate heat exchanger (1), comprising at least: -First board group (2), and -Second plate group (3), The first plate group (2) and the second plate group (3) are formed by heat exchange plates having at least two openings and arranged vertically to each other, and the heat exchange plates are attached to each other as a plate pair. The internal portions of the plate pair are arranged to be connected to each other via flow passages (2a, 2b, 3a, 3b) formed by the openings of the heat exchange plates, wherein the main circuit of the heat exchanger is formed between the openings in the heat exchange plates. - A common outer shell surrounding the first plate group (2) and the second plate group (3), the outer shell comprising a longitudinal cylindrical shell (4) and end plates (5a, 5b) disposed at both ends of the shell. - The inlet connector (6a) and the outlet connector (6b) of the first plate group are connected to the flow passages (2a, 2b) of the first plate group. - The inlet connector (7a) and outlet connector (7b) of the second plate group are connected to the flow passages (3a, 3b) of the second plate group. - Inlet connectors (8a) and outlet connectors (8b, 8c) for the heat exchange medium flowing inside the shell, the inlet connectors and the outlet connectors being arranged through the outer shell, wherein an auxiliary circuit is formed between the connectors of the outer shell arranged to spatially connect with the pairs of plates of the plate assembly. The first plate group (2) and the second plate group (3) are arranged adjacent to each other inside the common outer shell, and the first plate group (2) has a diameter defined by the outer edge of the heat exchange plate that is larger than the diameter of the second plate group (3), and at least one partition plate (9) is arranged between the first plate group (2) and the second plate group (3), the partition plate (9) having a size at least corresponding to the size of the plate group with the larger diameter, and the partition plate (9) is further arranged to extend from the outer surface of the plate group to the inner surface of the shell on one side of the plate group to form a plurality of channels for heat exchange medium in the shell side of the heat exchanger. The first plate group and the second plate group have a common shell side in the heat exchanger for a heat exchange medium flowing inside the shell, wherein a single heat exchange medium is arranged to flow inside the shell side of the plate heat exchanger.

2. The plate heat exchanger according to claim 1, characterized in that, The plate heat exchanger further includes a third plate group (10) having a diameter defined by the outer edge of the heat exchange plate that is at least smaller than the diameter of the first plate group (2).

3. The plate heat exchanger according to claim 2, characterized in that, The plate heat exchanger includes a third plate group (10) having a diameter smaller than that of the first plate group (2) and the second plate group (3).

4. The plate heat exchanger according to claim 2, characterized in that, The first plate group, the second plate group, and the third plate group are arranged adjacent to each other inside the same common outer shell.

5. The plate heat exchanger according to claim 2, characterized in that, The plate heat exchanger includes a second partition plate (11) arranged between the third plate group (10) and the plate group arranged adjacent to the third plate group.

6. The plate heat exchanger according to any one of claims 1-5, characterized in that, - The inlet connector (6a) and / or the outlet connector (6b) of the first plate group (2) are arranged on the outer side of the outer surface of the second plate group (3).

7. The plate heat exchanger according to any one of claims 2-5, characterized in that, - The inlet connector (7a) and / or the outlet connector (7b) of the second plate group (3) are arranged on the outer side of the outer surface of the third plate group (10).

8. The plate heat exchanger according to any one of claims 1-5, characterized in that, At least one of the plate groups (2, 3, 10) includes inlet connectors (6a, 7a, 12a) and outlet connectors (6b, 7b, 12b) comprising nested connecting pipes, wherein the outer diameter of the inner connecting pipe is smaller than the diameter of the outer connecting pipe and the flow passage of the plate group.

9. A modular structure comprising at least two modules arranged inside the same outer housing, the modules being separated from each other by partition walls, characterized in that, At least one module is formed from a plate heat exchanger according to any one of claims 1 to 8.

10. The modular structure according to claim 9, characterized in that, The outer shell of the module is continuous along the length of the modular structure.

11. The modular structure according to claim 9 or claim 10, characterized in that, The partition wall between the plate heat exchanger and the adjacent module is the end plate (5a) of the outer casing of the plate heat exchanger (1).

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