Heat exchange plate, heat exchange plate pair, core plate bundle and heat exchanger

Abstract

The utility model provides a heat exchange plate, a heat exchange plate pair, a core plate bundle and a heat exchanger, the heat exchange plate comprises a plate body, the two ends of the plate body are flow guide areas, the middle of the plate body is a heat exchange area, and corner holes are formed in the flow guide areas; a plurality of rows of protrusion sets are arranged in the heat exchange area in the length direction of the plate body at intervals, each row of protrusion sets is perpendicular to the length direction, and a first flow guide groove extending to the edge of the plate body is formed between every two adjacent rows of protrusion sets. The protrusion set comprises a plurality of first protrusions arranged at intervals in the width direction of the plate body, and at least part of the first protrusions are arranged in a staggered mode in the length direction. The heat exchange plate, the heat exchange plate pair, the core plate bundle and the heat exchanger are simple in structure, convenient to manufacture, easy to disassemble and clean through mechanical cleaning, meanwhile, the heat exchange effect is ensured, the service life of the heat exchanger is prolonged, and the heat exchanger can operate efficiently.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a heat exchange plate, a heat exchange plate pair, a core plate bundle, and a heat exchanger. Background Art

[0002] Plate heat exchangers are devices that transfer part of the heat of a hot fluid to a cold fluid. They play an important role in chemical, petroleum, power, food and many other industrial production. Among them, plate and shell heat exchangers are more suitable for working conditions with high pressure, high temperature and hazardous media due to their compact structure, small footprint, flexible process combination, solid overall shell structure, fully welded core plate bundle and no sealing gaskets. They are especially popular in the petrochemical industry.

[0003] Existing plate and shell heat exchangers mostly use a herringbone corrugated structure to increase fluid disturbance and improve heat exchange efficiency. After a period of use, the heat exchanger needs to be cleaned regularly due to scaling and other factors that affect the heat exchange efficiency. However, the herringbone corrugation makes it difficult to clean the shell side of the heat exchanger. When the heat exchanger is disassembled and mechanically cleaned, usually only the outer periphery of the core plate bundle can be partially flushed, and the inside cannot be cleaned. As for chemical cleaning, on the one hand, the conditions are not met in many applications, and on the other hand, it is rarely used because it can easily damage the core plate bundle, pipelines, etc. Therefore, there is an urgent need for a heat exchanger that is easy to clean while ensuring heat exchange efficiency. Summary of the Invention

[0004] In view of this, the purpose of this application is to propose a heat exchange plate, a heat exchange plate pair, a core plate bundle and a heat exchanger to solve the related problems mentioned in the background technology.

[0005] In a first aspect of the present application, a heat exchange plate is provided, comprising a plate body, wherein both ends of the plate body are guide areas, and the middle portion is a heat exchange area, wherein corner holes are provided in the guide areas; the heat exchange areas are provided with multiple rows of protrusion groups at intervals along the length direction of the plate body, and each row of the protrusion groups is arranged perpendicular to the length direction, and a first guide groove extending to the edge of the plate body is formed between two adjacent rows of the protrusion groups; the protrusion group includes a plurality of first protrusions arranged at intervals along the width direction of the plate body, and at least some of the first protrusions are staggered along the length direction.

[0006] Furthermore, the guide area includes multiple rows of corrugation groups arranged at intervals, each row of the corrugation groups connects the corner holes and the heat exchange area, and a second guide groove is formed between two adjacent rows of the corrugation groups.

[0007] Furthermore, the corrugation group includes alternately arranged second protrusions and second recesses, the height of the second protrusions is equal to 1 / 2 of the height of the first protrusions; along the extension direction of the corrugation group, the length of the second protrusions is less than or equal to the length of the second recesses.

[0008] Furthermore, the plate body is oblong, the heat exchange area is rectangular, the corner holes are located in the middle of the guide area, and multiple rows of the corrugation groups are arranged radially.

[0009] Furthermore, the heat exchange zone includes a low resistance zone arranged at the corners and a high resistance zone arranged in the middle, the first protrusions in the low resistance zone are aligned along the length direction, and the first protrusions in the high resistance zone are staggered along the length direction.

[0010] Furthermore, the length of the low resistance zone is less than or equal to 1 / 2 of the length of the heat exchange zone, and the width of the low resistance zone is less than or equal to 1 / 3 of the width of the heat exchange zone.

[0011] In a second aspect of the present application, a heat exchange plate pair is provided, comprising two heat exchange plates as described in the first aspect above, arranged opposite to each other, with the first protrusions of the two heat exchange plates arranged back to back, forming a first medium flow channel between the two heat exchange plates.

[0012] The third aspect of the present application provides a core plate bundle, comprising a plurality of stacked heat exchange plate pairs as described in the second aspect above, wherein the first protrusions of two adjacent heat exchange plate pairs are arranged opposite to each other, forming a second medium flow channel between the two adjacent heat exchange plate pairs.

[0013] Furthermore, pressure plates are respectively provided on both sides of the plurality of stacked heat exchange plate pairs in the thickness direction, and elastic baffles are provided on the sides of the plurality of stacked heat exchange plate pairs.

[0014] In a fourth aspect of the present application, a heat exchanger is provided, comprising a shell and a flange cover plate, wherein the shell is provided with a core plate bundle as described in the third aspect above, the side of the flange cover plate is connected to a first medium inlet and outlet, and the side of the shell is connected to a second medium inlet and outlet.

[0015] From the above description, it can be seen that the heat exchange plate, heat exchange plate pair, core plate bundle and heat exchanger provided by the present application include a plate body, the two ends of the plate body are guide areas, the middle part is a heat exchange area, and corner holes are provided in the guide area; the heat exchange area is provided with multiple rows of protrusion groups at intervals along the length direction of the plate body, and each row of protrusion groups is arranged perpendicular to the length direction, and a first guide groove extending to the edge of the plate body is formed between two adjacent rows of protrusion groups. By setting a vertical protrusion group, a straight flow channel can be formed. In this way, after scaling and clogging in the heat exchange area, the belt can be directly mechanically flushed from the shell side of the heat exchanger. The heat exchange plate, heat exchange plate pair, core plate bundle and heat exchanger have simple structures, are easy to manufacture, are easy to disassemble and can be cleaned by mechanical cleaning, while ensuring the heat exchange effect, increasing the service life of the heat exchanger and making the heat exchanger run efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 This is a structural schematic diagram of a heat exchange plate in an embodiment of the present application;

[0018] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of the middle heat exchange plate at A;

[0019] Figure 3 for Figure 2 Schematic diagram of the cross section of the middle heat exchange plate forming a heat exchange plate pair at CC;

[0020] Figure 4 for Figure 2 Schematic diagram of the cross section of the middle heat exchange plate forming a heat exchange plate pair at DD;

[0021] Figure 5 for Figure 1 Schematic diagram of the enlarged structure of the middle heat exchange plate at B;

[0022] Figure 6 for Figure 5 Schematic diagram of the cross section of the middle heat exchange plate forming a heat exchange plate pair at EE;

[0023] Figure 7 for Figure 1 Schematic diagram of the enlarged structure of the middle heat exchange plate at F;

[0024] Figure 8 This is a schematic diagram of a three-dimensional structure of a core plate bundle in an embodiment of the present application;

[0025] Figure 9 This is a schematic diagram of the three-dimensional structure of a heat exchanger in an embodiment of the present application.

[0026] Figure numerals: 1, plate body; 2, guide area; 2-1, corner hole; 3, heat exchange area; 3-1, low resistance area; 3-2, high resistance area; 4, protrusion group; 4-1, first protrusion; 5, first guide groove; 6, corrugation group; 6-1, second protrusion; 6-2, second depression; 7, second guide groove; 8, heat exchange plate pair; 9, pressure plate; 10, elastic baffle; 11, shell; 11-1, second medium inlet and outlet; 12, flange cover; 12-1, first medium inlet and outlet. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0028] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] Plate heat exchangers are devices that transfer part of the heat of a hot fluid to a cold fluid. They play an important role in chemical, petroleum, power, food and many other industrial production. Among them, plate and shell heat exchangers are more suitable for working conditions with high pressure, high temperature and hazardous media due to their compact structure, small footprint, flexible process combination, solid overall shell structure, fully welded core plate bundle and no sealing gaskets. They are especially popular in the petrochemical industry.

[0030] Existing plate and shell heat exchangers mostly use a herringbone corrugated structure to increase fluid disturbance and improve heat exchange efficiency. After a period of use, the heat exchanger needs to be cleaned regularly due to scaling and other factors that affect the heat exchange efficiency. However, the herringbone corrugation makes it difficult to clean the shell side of the heat exchanger. When the heat exchanger is disassembled and mechanically cleaned, usually only the outer periphery of the core plate bundle can be partially flushed, and the inside cannot be cleaned. As for chemical cleaning, on the one hand, the conditions are not met in many applications, and on the other hand, it is rarely used because it can easily damage the core plate bundle, pipelines, etc. Therefore, there is an urgent need for a heat exchanger that is easy to clean while ensuring heat exchange efficiency.

[0031] In addition, because the corrugated structure of the plates that make up the core plate bundle is mostly a herringbone corrugated structure, there is a lack of a fluid distribution area with a diversion function, which makes the flow distribution of the fluid on the plate side very uneven and the retention area is large. This will not only cause the retention area of the plate side flow channel that cannot be cleaned to be prone to scaling, but the uneven heat exchange temperature will often shorten the life of the core plate bundle. At the same time, the insufficient heat exchange performance also causes low efficiency and waste of operating energy.

[0032] For example, patent CN220270193U discloses a heat transfer plate for a plate and shell heat exchanger, which has a common herringbone corrugated structure of the core plate of a plate and shell heat exchanger. This patent mainly adds a V-ribbed design structure to solve the rigidity problem of the plate. There is no guide setting for the plate side flow channel, and the flow distance between the two corner holes is the shortest, resulting in uneven distribution of the heat transfer fluid, which affects the heat transfer performance.

[0033] For another example, patent CN107076520B discloses a heat transfer plate and a plate heat exchanger. The circular plate is cut into an oblong structure, which reduces the area of ineffective heat transfer and increases the flow diversion space of the shell-side fluid. At the same time, the diversion design of the corner hole area on the plate side is added, and a positive and negative corrugated structure is adopted to reduce the resistance drop of the heat exchanger. The disadvantage is that the cleaning effect of this design structure on the shell side is still unsatisfactory. At the same time, the heat transfer area lacks a drag reduction design at different flow lengths, the flow distribution effect is poor, and the heat transfer performance is affected.

[0034] The following is a specific embodiment and combined with Figures 1 to 9 To describe the technical solution of this application in detail.

[0035] In some embodiments of the present application, a heat exchange plate is provided, such as Figure 1As shown, it includes a plate body 1, the two ends of the plate body 1 are guide areas 2, the middle part is a heat exchange area 3, and the guide area 2 is provided with a corner hole 2-1; the heat exchange area 3 is provided with multiple rows of protrusion groups 4 at intervals along the length direction of the plate body 1, and each row of the protrusion groups 4 is arranged perpendicular to the length direction, and a first guide groove 5 extending to the edge of the plate body 1 is formed between two adjacent rows of the protrusion groups 4; the protrusion group 4 includes a plurality of first protrusions 4-1 arranged at intervals along the width direction of the plate body 1, and at least part of the first protrusions 4-1 are staggered along the length direction.

[0036] The heat exchange plate includes a plate body 1, such as Figure 1 As shown in the figure, the L direction is the length direction of the plate body 1, and the W direction is the width direction of the plate body 1. The plate body 1 is an oblong, and both ends of the plate body 1 are guide areas 2. The shape of the guide area 2 is, for example, semicircular. Corner holes 2-1 are provided in the guide area 2 for the fluid medium to enter and exit. On the plate side, the fluid can flow in from the corner hole 2-1 above the plate body 1 and flow out from the corner hole 2-1 below. The corner hole 2-1 of the plate body 1 can cooperate with the corner hole 2-1 of the other heat exchange plate in the heat exchange plate pair 8 to form a complete fluid inlet and outlet port for the first medium flow channel.

[0037] The middle part of the plate body 1 is a heat exchange area 3, which is rectangular in shape and is used for fluid heat exchange. The heat exchange area 3 is provided with multiple rows of protrusion groups 4 at intervals along the length direction of the plate body 1, and each row of protrusion groups 4 is arranged perpendicular to the length direction. Figure 1 and Figure 2 As shown, a first guide groove 5 extending to the edge of the plate body 1 is formed between two adjacent rows of protrusion groups 4. The first guide groove of the plate body 1 can cooperate with the first guide groove of another pair of heat exchange plate pairs 8 to form a second medium flow channel. The second medium flow channel is a shell-side flow channel. The fluid can flow from one side of the heat exchange area 3 to the other side along the width direction. By setting a vertical protrusion group 4, a straight flow channel can be formed. In this way, after the heat exchange area 3 is scaled and blocked, impurities can be directly mechanically flushed away from the shell side of the heat exchanger to ensure that the shell side can be cleaned.

[0038] The protrusion group 4 includes a plurality of first protrusions 4-1 arranged at intervals along the width direction of the plate body 1. The shape of the first protrusion 4-1 is, for example, rectangular. The first protrusion 4-1 is used to provide support and form a first medium flow channel. Figure 3 As shown, at least part of the first protrusions 4-1 are staggered along the length direction to form three-dimensional alternating flow channels on the plate side of the heat exchange zone 3, thereby enhancing the disturbance of the medium and ensuring the heat exchange effect. This design will not affect the cleaning of the shell side.

[0039] The heat exchange plate has a simple structure, is easy to manufacture, and is easy to disassemble and clean through mechanical cleaning. At the same time, it ensures the heat exchange effect, increases the service life of the heat exchanger, enables the heat exchanger to operate efficiently, and saves energy.

[0040] In some embodiments, as Figure 1 and Figure 2 As shown, the guide area 2 includes multiple rows of corrugation groups 6 arranged at intervals, each row of the corrugation groups 6 connects the corner holes 2 - 1 and the heat exchange area 3 , and a second guide groove 7 is formed between two adjacent rows of the corrugation groups 6 .

[0041] like Figure 1 As shown, the guide area 2 includes multiple rows of corrugation groups 6 for providing support and disturbing the fluid. The corrugation groups 6 connect the corner holes 2-1 and the heat exchange area 3 to guide the fluid to flow between the corner holes 2-1 and the heat exchange area 3. Second guide grooves 7 are formed between adjacent corrugation groups 6. The second guide grooves 7 can be used to form both the first medium flow channel and the second medium flow channel. After the second medium flow channel is formed, it is also convenient for the shell side to mechanically clean part of the guide area 2.

[0042] In some embodiments, as Figure 7 As shown, the corrugation group 6 includes alternately arranged second protrusions 6-1 and second recesses 6-2, and the height of the second protrusion 6-1 is equal to 1 / 2 of the height of the first protrusion 4-1; along the extension direction of the corrugation group 6, the length of the second protrusion 6-1 is less than or equal to the length of the second recess 6-2.

[0043] like Figure 7 As shown, the corrugation group 6 includes alternately arranged second protrusions 6-1 and second recesses 6-2, and the height of the second protrusion 6-1 is equal to 1 / 2 of the height of the first protrusion 4-1, so that the guide area 2 forms a mid-surface guide structure. Because a tubular structure flow channel is formed in the first medium flow channel, this can reduce the fluid flow resistance and make the operation more energy-efficient. The tubular structure flow channel is also beneficial for the fluid in the second medium flow channel to be diverted from the inlet to the area blocked by the two corner holes 2-1, which can improve the heat exchange effect. Combined with the radial arrangement of the corrugation group 6, it is easier to help mechanical flushing and reduce resistance.

[0044] Along the extension direction of the corrugation group 6, the length of the second recess 6-2 is set to be greater than the length of the second protrusion 6-1. For example, the length of the second recess 6-2 is more than 1.5 times the length of the second protrusion 6-1. In this way, the spacing between adjacent second protrusions 6-1 on the shell side along the extension direction of the corrugation group 6 is larger, which is more conducive to mechanical cleaning. At the same time, the resistance is smaller, which is conducive to the flow of the second medium, reduces the area of the retention area blocked by the corner hole 2-1, and improves the heat exchange effect; and setting a shorter second protrusion 6-1 can also make the gap of the flow channel of the tubular structure of the first medium smaller, and it is not easy to form a diversion of the tubular structure.

[0045] In some embodiments, as Figure 1As shown, the plate body 1 is oblong, the heat exchange area 3 is rectangular, the corner hole 2 - 1 is located in the middle of the guide area 2 , and multiple rows of the corrugation groups 6 are arranged radially.

[0046] The corner hole 2-1 is arranged in the middle of the guide area 2, and the corrugation group 6 is arranged radially from the corner hole 2-1 to the heat exchange area 3. Compared with the corner hole 2-1 being arranged at the end of the guide area 2, the fluid flow flowing to the heat exchange area 3 can be distributed relatively evenly.

[0047] In some embodiments, as Figure 1 、 Figure 2 and Figure 5 As shown, the heat exchange zone 3 includes a low resistance zone 3-1 arranged at the corners and a high resistance zone 3-2 arranged in the middle. The first protrusions 4-1 in the low resistance zone 3-1 are aligned along the length direction, and the first protrusions 4-1 in the high resistance zone 3-2 are staggered along the length direction.

[0048] like Figure 1 As shown, because the distances from the corner hole 2-1 to different positions of the heat exchange zone 3 are different, the flow lengths of the fluid flowing from the corner hole 2-1 to the heat exchange zone 3 are also different. The left and right sides of the heat exchange zone 3 are farther away from the corner hole 2-1, the flow lengths are longer, and the flow resistance of the fluid is relatively large, while the middle part of the heat exchange zone 3 is closer to the corner hole 2-1, the flow lengths are shorter, and the flow resistance of the fluid is relatively small. This leads to uneven fluid distribution, and stagnation areas are easily formed on the left and right sides of the heat exchange zone 3, affecting the heat exchange effect.

[0049] To balance the flow, Figure 1 As shown, the heat exchange zone 3 is structurally divided into a low resistance zone 3-1 and a high resistance zone 3-2. The low resistance zone 3-1 is located at the four corners of the heat exchange zone 3 and has a wedge or triangle shape. The area of the heat exchange zone 3 other than the low resistance zone 3-1 is the high resistance zone 3-2 and has an octagon or hexagon shape. The low resistance zone 3-1 and the high resistance zone 3-2 are connected. The location of the low resistance zone 3-1 is the area where the fluid is easily retained. The flow rate is balanced by designing the structure of different resistances in the heat exchange zone 3.

[0050] like Figure 2 As shown in FIG. 3 , which is an enlarged schematic diagram of the low resistance area 3 - 1 , the first protrusions 4 - 1 therein are aligned along the length direction to form a uniform array arrangement structure. Figure 3 As shown, a long contact is formed at the first protrusion 4-1, and as shown Figure 4As shown, a continuous wavy straight flow channel is formed in the gap of the first protrusion 4-1, so that the first medium mainly undergoes two-dimensional disturbance at this location, so the flow resistance in this area is relatively small, which is conducive to balancing the flow during use and ensuring the heat exchange effect of this area. It is also beneficial to reduce the overall resistance of the product and achieve the purpose of energy saving; and from the middle of the heat exchange zone 3 to both sides in the width direction, the length of the low resistance zone 3-1 is constantly increasing, so the wavy straight flow channel is also constantly growing, so that the closer to the edge of the heat exchange zone 3, the smaller the flow resistance, thereby balancing the overall flow of the heat exchange zone 3 and avoiding the formation of a stagnation zone.

[0051] like Figure 5 As shown in FIG. 3 , it is an enlarged schematic diagram of the high resistance area 3 - 2 , where the first protrusions 4 - 1 are arranged in a staggered manner along the length direction. Figure 6 As shown, discontinuous flow channels and discontinuous contacts are formed at the first protrusions 4-1. The discontinuous flow channels will enhance the turbulence and increase the resistance at the same time, thereby improving the heat transfer effect of the product. Alternating and staggered first protrusions 4-1 are set in the high resistance area 3-2, so that the fluid in this area undergoes more three-dimensional turbulent disturbances, ensuring better heat exchange effects.

[0052] The heat exchange plate also performs different flow resistance balance designs on the heat exchange zone 3, eliminating the retention area of the heat exchanger, making the product have better heat exchange performance, longer service life, saving operating energy, and not affecting the flow channel cleaning on the shell side.

[0053] In some embodiments, as Figure 1 As shown, in order to achieve a smooth transition between the high resistance area 3-2 and the low resistance area 3-1, the lengths of the first protrusions 4-1 are arranged alternately long and short along the dividing line between the high resistance area 3-2 and the low resistance area 3-1, thereby ensuring the structural stability of the heat exchange plate while achieving the transition between the aligned arrangement and the staggered arrangement of the first protrusions 4-1.

[0054] In some embodiments, as Figure 1 As shown, the length of the low resistance zone 3 - 1 is less than or equal to 1 / 2 of the length of the heat exchange zone 3 , and the width of the low resistance zone 3 - 1 is less than or equal to 1 / 3 of the width of the heat exchange zone 3 .

[0055] The shape of the low resistance zone 3-1 is, for example, a triangle or a wedge, and is not specifically limited. The length of the low resistance zone 3-1 is less than or equal to 1 / 2 of the length of the heat exchange zone 3, for example, the length of the low resistance zone 3-1 is 1 / 2, 1 / 3 or 1 / 4 of the length of the heat exchange zone 3, etc., to ensure the heat exchange effect of the high resistance zone 3-2; the width of the low resistance zone 3-1 is less than or equal to 1 / 3 of the width of the heat exchange zone 3, for example, the width of the low resistance zone 3-1 is 1 / 3, 1 / 4 or 1 / 5 of the width of the heat exchange zone 3, etc., and is not specifically limited, to ensure a balanced effect on the flow.

[0056] In some embodiments of the present application, a heat exchange plate pair 8 is provided, comprising two heat exchange plates as described in any of the above embodiments arranged opposite to each other, with the first protrusions 4-1 of the two heat exchange plates arranged back to back to form a first medium flow channel between the two heat exchange plates.

[0057] The heat exchange plate pair 8 includes two heat exchange plates arranged opposite to each other. The edges of the plate bodies 1 of the two heat exchange plates are welded together. The first protrusions 4-1 of the two plate bodies 1 are arranged back to back, forming a first medium flow channel between the two heat exchange plates. The first medium flow channel is a plate side flow channel. The heat exchange plate pair 8 can effectively even out the fluid flow and improve the heat exchange effect.

[0058] In some embodiments of the present application, a core plate bundle is provided, such as Figure 8 As shown, it includes a plurality of stacked heat exchange plate pairs 8 as described in any of the above embodiments, and the first protrusions 4 - 1 of two adjacent heat exchange plate pairs 8 are arranged opposite to each other, forming a second medium flow channel between the two adjacent heat exchange plate pairs 8 .

[0059] like Figure 8 As shown, the core plate bundle includes multiple stacked heat exchange plate pairs 8, and the first protrusions 4-1 of two adjacent heat exchange plate pairs 8 are offset against each other to form a second medium flow channel between the two heat exchange plate pairs 8. The second medium flow channel is a shell-side flow channel. The first protrusions 4-1 in different areas of the heat exchange zone 3 are combined by rotating 180 degrees along the center axis of the corner hole 2-1 to form one-to-one corresponding contacts. The first guide grooves 5 relatively form straight channel flow channels, and the second protrusions 6-1 and second recesses 6-2 of different guide areas 2 also have one-to-one corresponding corrugations. Overall, after the core plate bundle is scaled and blocked, the heat exchange zone 3 can be completely mechanically cleaned, and the guide area 2 can also be partially cleaned.

[0060] In some embodiments, as Figure 8 As shown, pressure plates 9 are respectively provided on both sides of the plurality of stacked heat exchange plate pairs 8 in the thickness direction, and elastic baffles 10 are provided on the sides of the plurality of stacked heat exchange plate pairs 8 .

[0061] Pressure plates 9 are provided on both sides of the core plate bundle, and a plurality of elastic baffles 10 are provided on the side surfaces. The elastic baffles 10 are used to provide support and buffering and prevent leakage.

[0062] In some embodiments of the present application, a heat exchanger is provided, such as Figure 9 As shown, it includes a shell 11 and a flange cover 12. The shell 11 is provided with a core plate bundle as described in any of the above embodiments. The side of the flange cover 12 is connected to a first medium inlet and outlet 12-1, and the side of the shell 11 is connected to a second medium inlet and outlet 11-1.

[0063] like Figure 9As shown, the heat exchanger includes an elongated shell 11 and a flange cover 12. A core plate bundle is provided in the shell 11, and the core plate bundle can be welded to the flange cover 12. After a certain period of use, the core plate bundle can be pulled out for mechanical cleaning. Two first medium inlets and outlets 12-1 are provided on the flange cover 12. The first medium inlet and outlet 12-1 are opposite to the corner hole 2-1 of the plate body 1 and connected to the first medium flow channel; a second medium inlet and outlet 11-1 is provided on the opposite sides of the shell 11 respectively, and the second medium inlet and outlet 11-1 are opposite to the side of the core plate bundle and connected to the second medium flow channel.

[0064] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0065] In addition, when details are set forth to describe exemplary embodiments of the present application, it will be apparent to those skilled in the art that the present application embodiments can be implemented without these details or with variations in these details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0066] While the present application has been described in conjunction with the embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0067] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of this application.

Claims

1. A heat exchange plate, characterized in that: It includes a plate body, the two ends of the plate body are guide areas, the middle part is a heat exchange area, and the guide area is provided with corner holes; The heat exchange area is provided with multiple rows of protrusion groups at intervals along the length direction of the plate body, each row of the protrusion groups is arranged perpendicular to the length direction, and a first guide groove extending to the edge of the plate body is formed between two adjacent rows of the protrusion groups; The protrusion group includes a plurality of first protrusions arranged at intervals along the width direction of the plate body, and at least some of the first protrusions are arranged in a staggered manner along the length direction.

2. The heat exchange plate according to claim 1, characterized in that The guide area includes multiple rows of corrugation groups arranged at intervals, each row of the corrugation groups connects the corner holes and the heat exchange area, and a second guide groove is formed between two adjacent rows of the corrugation groups.

3. The heat exchange plate according to claim 2, characterized in that: The corrugation group includes alternately arranged second protrusions and second recesses, the height of the second protrusions is equal to 1 / 2 of the height of the first protrusions; along the extension direction of the corrugation group, the length of the second protrusions is less than or equal to the length of the second recesses.

4. The heat exchange plate according to claim 2, characterized in that: The plate body is oblong, the heat exchange area is rectangular, the corner holes are located in the middle of the guide area, and multiple rows of corrugation groups are arranged radially.

5. The heat exchange plate according to claim 1, characterized in that: The heat exchange area includes a low resistance area arranged at the corners and a high resistance area arranged in the middle. The first protrusions in the low resistance area are aligned along the length direction, and the first protrusions in the high resistance area are staggered along the length direction.

6. The heat exchange plate according to claim 5, characterized in that: The length of the low resistance zone is less than or equal to 1 / 2 of the length of the heat exchange zone, and the width of the low resistance zone is less than or equal to 1 / 3 of the width of the heat exchange zone.

7. A heat exchange plate pair, characterized in that: The method comprises two heat exchange plates according to any one of claims 1 to 6 arranged opposite to each other, wherein the first protrusions of the two heat exchange plates are arranged back to back to form a first medium flow channel between the two heat exchange plates.

8. A core plate bundle, characterized in that: The heat exchange plate pairs according to claim 7 are stacked together, wherein the first protrusions of two adjacent heat exchange plate pairs are arranged opposite to each other, and a second medium flow channel is formed between the two adjacent heat exchange plate pairs.

9. The core plate bundle according to claim 8, characterized in that: Pressure-bearing plates are respectively provided on both sides of the plurality of stacked heat exchange plate pairs in the thickness direction, and elastic baffles are respectively provided on the side surfaces of the plurality of stacked heat exchange plate pairs.

10. A heat exchanger, characterized in that: It comprises a shell and a flange cover, wherein the core plate bundle as claimed in claim 8 or 9 is arranged in the shell, the side of the flange cover is connected to the first medium inlet and outlet, and the side of the shell is connected to the second medium inlet and outlet.

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