A heat exchange module and a plate anti-fouling heat exchanger

Abstract

This invention relates to the field of heat exchangers, specifically a heat exchange module and a plate-type anti-fouling heat exchanger. The heat exchange module includes two sets of box-type heat exchange sub-units. Each sub-unit has heat exchange plates arranged parallel to each other. The inner cavity of each heat exchange plate forms a heat exchange medium flow channel, and adjacent heat exchange plates form a wastewater flow channel. A partition plate is arranged in a cross-shaped staggered arrangement with the heat exchange plates and is inserted into both the wastewater and heat exchange medium flow channels, dividing them into S-shaped flow channels. The wastewater and heat exchange medium flow channels within each sub-unit flow in opposite directions. This invention reduces the size of the heat exchanger while ensuring high heat exchange efficiency and minimizing internal clogging.

Description

Technical Field

[0001] This invention relates to the field of heat exchangers, specifically a heat exchange module and a plate-type anti-fouling heat exchanger. Background Technology

[0002] With the rapid development of heat exchanger technology, heat exchangers for non-clean working fluids, such as floating head heat exchangers and U-tube heat exchangers, have been developed for special scenarios involving non-clean working fluids, such as petrochemicals, textiles, industrial wastewater containing solid particles, and sewage / sludge containing biomass. Achieving stable and efficient heat transfer over long periods is extremely difficult in the field of process fluid heat exchange with non-clean working fluids. In such applications, even if the heat exchanger performs satisfactorily at the beginning of operation, the surfaces of the heat transfer elements in contact with the non-clean working fluid quickly become contaminated, and even further, a biofilm may form on the surface, causing a rapid deterioration in the overall heat exchange efficiency of the heat exchanger. This necessitates periodic disassembly and manual cleaning during shutdown, or the use of complex online cleaning devices, resulting in high operating and labor costs.

[0003] While floating head heat exchangers and U-tube heat exchangers are suitable for heat exchange with non-clean working fluids, their heat exchange efficiency is generally much lower than that of conventional plate heat exchangers, making it impossible to efficiently extract and utilize the energy contained in the fluid working fluid. Furthermore, if plate heat exchangers are used, to ensure the flow of the working fluid in the non-clean side channels and avoid blockage by large particles, larger channels are often used on the non-clean side. This results in a lower unilateral convective heat transfer coefficient on the non-clean side, leading to a large plate heat exchanger size and making heat extraction from non-clean working fluids difficult. Therefore, it is imperative to address the trade-off between high heat exchange efficiency and large heat exchanger size. Summary of the Invention

[0004] To avoid and overcome the technical problems existing in the prior art, the present invention provides a heat exchange module and a plate-type anti-fouling heat exchanger. The present invention reduces the size of the heat exchanger while ensuring high heat exchange efficiency and minimizing internal blockage.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A heat exchange module includes a box-type heat exchange subunit. Each heat exchange subunit has heat exchange plates arranged in parallel at intervals. The inner cavity of the heat exchange plate forms a heat exchange medium flow channel, and the space between adjacent heat exchange plates forms a sewage flow channel. A partition plate is arranged in a cross shape with the heat exchange plates and is inserted into both the sewage flow channel and the heat exchange medium flow channel, dividing the sewage flow channel and the heat exchange medium flow channel into an S-shaped flow channel. The sewage flow channel and the heat exchange medium flow channel in each heat exchange subunit flow in opposite directions.

[0007] As a further aspect of the present invention: two sets of heat exchange sub-units are provided in the heat exchange module. The sewage and heat exchange medium in the two adjacent heat exchange sub-units form an S-shaped flow trajectory along the vertical direction. One of the sub-units is provided with a heat exchange medium inlet pipe box and a heat exchange medium reversing pipe box at its upper and lower ends, respectively. The other sub-unit is provided with a heat exchange medium outlet pipe box and a heat exchange medium reversing pipe box at its upper and lower ends, respectively. The heat exchange medium in one set of heat exchange sub-units is reversed through the heat exchange medium reversing pipe box and enters the other set of heat exchange sub-units.

[0008] As a further aspect of the present invention: each heat exchange plate is provided with two sets of heat exchange medium interfaces along the vertical direction, one set of heat exchange medium interfaces is connected to the heat exchange medium reversing pipe box, and the other set of heat exchange medium interfaces is connected to the heat exchange medium inlet pipe box or the heat exchange medium outlet pipe box.

[0009] As a further aspect of the present invention: each heat exchange plate has an opening at the corner of the plate body at the reversing connection point of two adjacent heat exchange sub-units, and the opening of each heat exchange plate and the adjacent partition plate enclose a reversing channel, through which the sewage in one set of heat exchange sub-units enters another set of heat exchange sub-units.

[0010] As a further embodiment of the present invention: the heat exchange plate includes two sets of plates with edges welded and fixed. The plates are welded and fixed together by uniformly arranged weld points. Each weld point is annular and has a central opening to allow sewage to flow between adjacent heat exchange plates. The plate cavity of the heat exchange plate is pressurized and expanded so that a flat curved heat exchange medium flow cavity is formed between the four adjacent sets of weld points. The opening of each heat exchange medium flow cavity is connected to the adjacent heat exchange medium flow cavity.

[0011] Each weld point is elliptical. A spatial rectangular coordinate system is established with the center point of each weld point as the origin. The arrangement direction of the heat exchange plates corresponds to the plane formed by the Z-axis and X-axis in the spatial rectangular coordinate system. The distance between two sets of weld points arranged opposite each other in the heat exchange medium flow cavity is 2S. T The spacing between the other two sets of weld points arranged opposite each other in the heat exchange medium flow cavity is 2S. L The maximum expansion height of the heat exchange medium flow cavity along the Y-axis is δ; then, in the spatial rectangular coordinate system, the contour coordinates of the heat exchange medium flow cavity along the Y-axis are:

[0012]

[0013] As a further aspect of the present invention: two parallel welding lines are provided on the heat exchange plate at the corresponding insertion position of the partition plate to separate the flow channels in the heat exchange plate, and an insertion channel is formed between the two parallel welding lines for the partition plate to be inserted; the distance between the center lines of two adjacent plates in the heat exchange subunit is 20-50mm, the thickness of the plates is 0.8-2.0mm, and the material of the plates is one of SUS304 stainless steel, 316L stainless steel, titanium, 2205 stainless steel and 2507 stainless steel.

[0014] A plate-type anti-fouling heat exchanger is provided, wherein at least one set of the aforementioned heat exchange modules is arranged inside the heat exchanger housing. Along the arrangement direction of the heat exchange sub-units inside the housing, the sewage flow channel of the heat exchange sub-unit at the first end of the housing is connected to the sewage inlet pipe, and the sewage flow channel of the heat exchange sub-unit at the last end of the housing is connected to the sewage outlet pipe. The sewage flow channels in two adjacent heat exchange sub-units are connected through reversing channels. After the sewage is reversing in each heat exchange sub-unit through each reversing channel, it travels along an S-shaped trajectory.

[0015] As a further embodiment of the present invention: the heat exchange medium inlet connector provides heat exchange medium to each heat exchange medium inlet pipe box after being diverted by the heat exchange medium inlet branch pipe; the heat exchange medium outlet connector receives heat exchange medium from each heat exchange medium outlet pipe box after being diverted by the heat exchange medium outlet branch pipe.

[0016] As a further aspect of the present invention: after the actual heat exchanger heat exchanger heat exchanger heat exchanger heat exchange medium heat exchange medium inlet joint and heat exchange medium outlet joint water inlet and outlet directions are reversed, and the sewage inlet pipe and sewage outlet pipe water inlet and outlet directions are reversed, so as to back-flushing the heat exchange medium flow channel and sewage flow channel.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This invention uses an interlaced layout design of partition plates, and also designs the heat exchange medium flow channel in the heat exchange plate cavity and the sewage flow channel in the heat exchange sub-unit as an S-shaped flow channel. The entire heat exchanger contains only heat exchange plates and partition plates, without any pipe connection structure. There are no blockage points or flow dead zones in the internal space. While reducing the size of the heat exchanger, it can ensure that the heat exchanger has high heat exchange efficiency and that the heat exchanger is not prone to blockage.

[0019] 2. This invention is formed by the series and parallel design of heat exchange sub-units, which allows multiple heat exchange modules to be freely combined and spliced ​​to expand and meet the needs of different working conditions. The dual-port design on the heat exchange plate, through the design of the tube box on the box body, can simultaneously supply heat exchange medium to each heat exchange plate in the heat exchange sub-unit and simultaneously discharge heat exchange medium. Moreover, with the help of the reversing tube box, the two sets of heat exchange sub-units in the heat exchange module can be reversed, which effectively extends the flow path of the heat exchange medium.

[0020] 3. The hot plate of the present invention is a non-rectangular plate with an opening at the end of the reversing channel of the sewage flow channel. The opening and the partition plate enclose the reversing channel to form a reversing channel. After the non-clean medium of each sewage flow channel in any heat exchange sub-unit converges in the reversing channel, it enters the reversing channel of the adjacent heat exchange sub-unit along the reversing channel in one of the heat exchange sub-units, thereby realizing the reversal of the non-clean working medium.

[0021] 4. Although the overall flow velocity of this invention is tortuous, the heat exchange medium and non-clean working fluid are both in pure counter-current heat exchange, whether in the overall or local flow path. For the local clean working fluid and non-clean working fluid heat exchange units, the flow path of the surrounding heat exchange units is opposite to that of the clean working fluid and non-clean working fluid. Moreover, the inlet and outlet water directions of the non-clean working fluid and heat exchange medium in the heat exchanger can be switched periodically to maintain pure counter-current heat exchange while flushing the surface of the heat exchange plate in the opposite direction. By repeatedly switching the flow direction, the dirt on the heat exchange surface can be removed, and the heat exchanger can achieve self-cleaning function.

[0022] 5. The heat exchange module of the present invention is centrally symmetrically designed. It provides the input and output of heat exchange medium and non-clean working fluid to the heat exchange sub-units in each heat exchange module through an external pipeline system. The detachable design of the end cover of the box allows the end cover of the box and the drain port at the bottom of the box to be opened and the dirt to be quickly removed by high-pressure water jet flushing under conditions of long-term and large-scale dirt accumulation or regular maintenance, thereby restoring the heat transfer performance.

[0023] 6. The heat exchange plate of this invention, formed by bulging, creates a three-dimensional variable space structure inside, which significantly improves heat exchange efficiency compared to a flat pure plate cavity structure. Through three-dimensional expansion, the process heat capacity flow rate on both sides is matched to make them close or the same. By utilizing the series and parallel connection of the pipes on the outer shell, the overall heat exchange is optimized while maximizing the use of space layout. The elliptical design of its weld points, with a central opening, allows non-clean working fluids to flow and converge on both sides of the heat exchange plate after passing through the central hole of the weld point, thereby achieving turbulence enhancement. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of the first embodiment of the heat exchange plate in this invention.

[0026] Figure 3 This is a schematic diagram of the structure of the second embodiment of the heat exchange plate in this invention.

[0027] Figure 4 This is a schematic diagram of the arrangement of the heat exchange plates inside the box in this invention.

[0028] Figure 5 This is a partial cross-sectional view of the heat exchange plate in this invention.

[0029] Figure 6This is a schematic diagram showing the switching of the inlet and outlet flow paths during backwashing according to the present invention.

[0030] In the picture:

[0031] 1. Housing; 11. Heat exchange medium inlet pipe housing;

[0032] 12. Heat exchange medium reversing pipe box; 13. Heat exchange medium outlet pipe box;

[0033] 2. Heat exchange module; 21. Heat exchange subunit;

[0034] 3. Heat exchange medium inlet connector; 31. Heat exchange medium inlet branch pipe;

[0035] 4. Heat exchange medium outlet joint; 41. Heat exchange medium outlet branch pipe;

[0036] 51. Sewage inlet pipe; 52. Sewage outlet pipe;

[0037] 6. Heat exchange plate; 61. Plate; 62. Heat exchange medium flow chamber;

[0038] 63. Welding point; 64. Partition plate; 65. Reversing channel; 66. Heat exchange medium interface. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figures 1-5 In this embodiment of the invention, a heat exchange module and a plate-type anti-fouling heat exchanger are provided. The housing 1 of the heat exchanger is composed of at least one set of heat exchange modules 2 arranged horizontally side by side. Taking the setting of two sets of heat exchange modules 2 as an example, each set of heat exchange modules 2 includes two sets of heat exchange sub-units 21 arranged horizontally side by side. The heat exchange sub-units 21 have a box-type structure, and the shell of each heat exchange sub-unit 21 has an integral structure.

[0041] The heat exchange subunit 21 has multiple sets of heat exchange plates 6 arranged vertically inside. Each heat exchange plate 6 includes two sets of plates 61. The edges of the two plates 61 are welded and fixed to the housing 1. The two plates 61 are welded and fixed together by evenly arranged weld points 63. When pressure is applied between the two sets of plates 61, an expanded three-dimensional space is formed between each weld point 63. Specifically, the plates 61 are made by stacking two metal plates together and forming them using laser or resistance welding. Then, the inlet and outlet pipes are connected, and the remaining edge parts of the plates are sealed again using laser or resistance welding. Finally, they are formed by hydraulic expansion.

[0042] The solder joints 63 are arranged in multiple rows on the vertical surface of the plate 61, with equal spacing between each row and staggered vertically between adjacent rows. For example... Figure 5 As shown, the heat exchange medium flow chambers 62 are formed between the four sets of diamond-shaped weld points 63. Multiple sets of heat exchange medium flow chambers 62 are provided, and each non-edge heat exchange medium flow chamber 62 has four openings, each opening communicating with an adjacent heat exchange medium flow chamber 62, thereby allowing the heat exchange medium to flow in the three-dimensional space bulging within the heat exchange plate 6. The weld points 63 are preferably annular elliptical weld points, and the central hole of the weld point 63 allows the external medium on both sides of the heat exchange plate 6 to flow through and converge.

[0043] A spatial rectangular coordinate system is established with the center point of weld point 63 as the origin. The arrangement direction of the heat exchange plate 6 corresponds to the plane formed between the Z-axis and X-axis in the spatial rectangular coordinate system. The distance between the two sets of weld points 63 arranged opposite each other in the heat exchange medium flow cavity 62 is 2S. T The distance between the other two sets of weld points 63 arranged opposite each other in the heat exchange medium flow cavity 62 is 2S. L The maximum expansion height of the heat exchange medium flow cavity 62 along the Y-axis is δ; therefore, in the spatial rectangular coordinate system, the contour coordinates of the heat exchange medium flow cavity 62 along the Y-axis are:

[0044]

[0045] Two sets of heat exchange medium inlets 66 are provided at the top and bottom of the heat exchange plate 6. One set of heat exchange medium inlets 66 is the inlet of the heat exchange plate 6, and the other set is the outlet of the heat exchange plate 6. The inlet and outlet positions of the heat exchange plate 6 vary depending on its location within the housing 1. The heat exchanger typically has an even number of heat exchange sub-units 21. The inlet and outlet positions of the heat exchange plates 6 in adjacent heat exchange sub-units 21 are opposite, but the vertical positions of the inlet and outlet of each heat exchange plate 6 usually correspond.

[0046] The heat exchange plate 6 has welds arranged horizontally. The number of welds is usually an odd number. The welds extend from one side of the plate 61 to the other side. The starting points of two adjacent sets of welds are located on both sides of the plate 6, thus forming a staggered arrangement. This divides the plate cavity of the heat exchange plate 6 into an S-shaped heat exchange medium flow channel, allowing the heat exchange medium to flow from top to bottom or from bottom to top in an S-shaped trajectory.

[0047] The horizontal weld seam on the heat exchange plate 6 is preferably a double-long weld line, with a long strip-shaped notch matching the thickness of the partition plate 64 within the double-long weld line for the partition plate 64 to be inserted. Multiple sets of heat exchange plates 6 share a partition plate 64 at corresponding heights. A wastewater flow channel is formed between two adjacent sets of heat exchange plates 6 and the partition plate 64. In this embodiment, wastewater refers to all non-clean working fluids. The wastewater flow channel is the same as the heat exchange medium flow channel, also in an S-shaped flow channel, except that the flow direction of the wastewater flow channel in each heat exchange subunit 21 is completely opposite to that in the heat exchange medium flow channel.

[0048] The heat exchange plate 6 has two arrangement forms, such as Figure 2 As shown, in the first embodiment, there is only one set of heat exchange modules. At this time, there is only one set of heat exchange sub-units 21 on the adjacent side of the heat exchange sub-unit 21. An opening is provided at the corner end of one of the heat exchange medium interfaces 66 adjacent to the heat exchange plate 6. The opening is a rectangular notch and is opposite to the sewage inlet or sewage outlet in the vertical position.

[0049] like Figure 3 As shown, in the second embodiment, it is composed of at least two sets of heat exchange modules. For the heat exchange sub-units 21 on both sides, their heat exchange plates 6 are still... Figure 2 As shown, however, for the middle heat exchange subunit 21, there are heat exchange subunits 21 on both adjacent sides. Openings are provided at the corners of the two adjacent sets of heat exchange medium interfaces 66 on one side of the heat exchange plate 6. The openings are rectangular notches, as shown... Figure 3 As shown.

[0050] In both embodiments described above, the opening of the heat exchange plate 6 and the enclosure 1 form a reversing channel 65. Wastewater in each heat exchange sub-unit 21 flows from top to bottom or bottom to top along an S-shaped trajectory, then enters the adjacent heat exchange sub-unit 21 through the reversing channel 65, forming an S-shaped flow trajectory opposite to that of the adjacent heat exchange sub-unit 21. The top of the enclosure between the two sets of heat exchange modules 2 is sealed to prevent water from entering the heat exchange sub-unit 21 at that location simultaneously from both the top and bottom. The distance between the centerlines of two adjacent plates 61 within the heat exchange sub-unit 21 is 20–50 mm, the thickness of the plates 61 is 0.8–2.0 mm, and the material of the plates 61 is one of SUS304 stainless steel, 316L stainless steel, titanium, 2205 stainless steel, and 2507 stainless steel.

[0051] Wastewater inlet pipe 51 and wastewater outlet pipe 52 are located at the bottom of heat exchange sub-units 21 on both sides of the housing 1, supplying wastewater horizontally into the heat exchange sub-units 21. The overall flow trajectory of each wastewater channel is S-shaped, and the overall wastewater flow trajectory between each heat exchange sub-unit 21 is as follows: Figure 1 As indicated by the middle arrow, it also forms an S-shape.

[0052] Along the arrangement direction of the heat exchange subunits 21, heat exchange medium inlet pipe box 11 and heat exchange medium outlet pipe box 13 are alternately arranged at the bottom of each heat exchange subunit 21. The heat exchange subunit 21 corresponding to the sewage inlet pipe 51 has a heat exchange medium outlet pipe box 13 at its bottom, and the heat exchange subunit 21 corresponding to the sewage outlet pipe 52 has a heat exchange medium inlet pipe box 11 at its bottom. Each heat exchange module 2 has a heat exchange medium reversing pipe box 12 at its top. The heat exchange medium in one set of heat exchange subunits 21 is reversed through the heat exchange medium reversing pipe box 12 before entering another set of heat exchange subunits 21, thus changing the flow direction of the heat exchange medium. The front and rear ends of the housing 1 are equipped with detachable end caps. The end cap frames are sealed with bolts and gaskets. The interface flanges of the sewage inlet pipe 51 and the sewage outlet pipe 62 are directly welded to the end caps. Drainage ports can be opened at the bottom of each heat exchange module 2 for drainage during maintenance. The heat exchange medium inlet connector 3 provides heat exchange medium to each heat exchange medium inlet pipe box 11 after being diverted through the heat exchange medium inlet branch pipe 31; the heat exchange medium outlet connector 4 receives heat exchange medium from each heat exchange medium outlet pipe box 13 after being diverted through the heat exchange medium outlet branch pipe 41; depending on the number of heat exchange modules 2, the heat exchange medium inlet connector 3 and the heat exchange medium outlet connector 4 are designed as tee or multi-way structures.

[0053] Under normal heat exchange conditions, the double-sided bulging heat exchange plate 6 has a smooth surface free of scale buildup, and the heat exchange module 2 lacks common components that easily cause scale buildup and blockage, such as connecting pipes, fluid distributors, and intermediate connecting pipes, ensuring long-term operation. In case of blockage or during maintenance, all drain ports at the bottom of the housing 1 are opened simultaneously. By increasing the flow rate and velocity of the fluid on the shell side, scale or solid particles are discharged from the drain ports at the bottom of the housing 1 before the drain ports are closed. In cases of extreme blockage leading to obstructed flow paths, or during routine maintenance, the end caps of each heat exchange module can be opened, along with the drain ports at the bottom of the housing 1. A high-pressure water gun can then be used to directly flush the scale on the outside of the heat exchange plate 6 in both directions, directly removing accumulated scale from the shell side and restoring the heat exchanger's performance.

[0054] After the actual heat exchanger capacity drops below 85% of the rated heat exchanger capacity, the positions of heat exchange medium inlet connector 3 and heat exchange medium outlet connector 4 are swapped, as are the positions of sewage inlet pipe 51 and sewage outlet pipe 52, to backflush the heat exchange medium flow channel and sewage flow channel. Before and after the position swapping, as... Figure 6As shown, heat exchanger 6 switches the flow path between the following two operating conditions.

[0055] Operating Condition 1: The heat exchange medium enters plate-side pipeline c through plate-side tee a, and then enters heat exchange plate 6 from plate-side a (i.e., heat exchange medium inlet connector 3) via plate-side pipeline c. After exchanging heat with the non-clean working medium on the shell side, it flows out from plate-side b (i.e., heat exchange medium outlet connector 4) to plate-side tee b, and finally leaves the heat exchanger. At the same time, the non-clean working medium enters shell-side pipeline c from shell-side tee b, enters heat exchange plate 6 from shell-side b (i.e., wastewater inlet pipe 51), and flows out from shell-side a (i.e., wastewater outlet pipe 52) to shell-side tee a, and finally leaves the heat exchanger.

[0056] Operating Condition 2: The heat exchange medium enters plate-side pipeline b via plate-side tee a, then enters heat exchange plate 6 via plate-side pipeline b (i.e., heat exchange medium outlet joint 4). After exchanging heat with the non-clean working medium on the shell side, it flows out from plate-side a (i.e., heat exchange medium inlet joint 3), flows through plate-side pipeline a to plate-side tee b, and finally leaves the heat exchanger. At the same time, the non-clean working medium enters shell-side pipeline b via shell-side tee b, enters heat exchange plate 6 via shell-side a (i.e., wastewater outlet pipe 52), flows out from shell-side b (i.e., wastewater inlet pipe 51), flows through shell-side pipeline a to shell-side tee a, and finally leaves the heat exchanger.

[0057] During the switching process between the two flow paths, the plate side and shell side of the heat exchanger always maintain countercurrent flow, and the heat exchange efficiency always remains at its best.

[0058] Using Reynolds number as a variable, under the same conditions of heat exchange medium, heat exchange velocity, and flow rate, the convective heat transfer coefficients of the existing rectangular hollow heat exchange plate and the heat exchange plate 6 of the present invention are compared as shown in Table 1 below. It can be seen that, under the same conditions, the heat exchange efficiency of the heat exchange plate of the present invention is much higher than that of the traditional rectangular hollow heat exchange plate.

[0059] Table 1

[0060]

[0061] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0062] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

Claims

1. A heat exchange module, characterized in that, The heat exchange module (2) includes two sets of box-type heat exchange sub-units (21). Each heat exchange sub-unit (21) has heat exchange plates (6) arranged in parallel at intervals. The inner cavity of the heat exchange plate (6) forms a heat exchange medium flow channel, and the adjacent heat exchange plates (6) form a sewage flow channel. The partition plate (64) is arranged in a cross shape with the heat exchange plate (6) and is inserted into the sewage flow channel and the heat exchange medium flow channel at the same time, dividing the sewage flow channel and the heat exchange medium flow channel into an S-shaped flow channel. The sewage flow channel and the heat exchange medium flow channel in each heat exchange sub-unit (21) flow in opposite directions. Two sets of heat exchange sub-units (21) are set in the heat exchange module (2). The sewage and heat exchange medium in the two adjacent heat exchange sub-units (21) form an S-shaped flow trajectory along the vertical direction. One of the sub-units (21) is provided with a heat exchange medium inlet pipe box (11) and a heat exchange medium reversing pipe box (12) at the upper and lower ends respectively. The other sub-unit is provided with a heat exchange medium outlet pipe box (13) and a heat exchange medium reversing pipe box (12) at the upper and lower ends respectively. The heat exchange medium in one set of heat exchange sub-units (21) enters the other set of heat exchange sub-units (21) after being reversed by the heat exchange medium reversing pipe box (12).

2. The heat exchange module according to claim 1, characterized in that, Each heat exchange plate (6) has two sets of heat exchange medium interfaces (66) along the vertical direction. One set of heat exchange medium interfaces (66) is connected to the heat exchange medium reversing pipe box (12), and the other set of heat exchange medium interfaces (66) is connected to the heat exchange medium inlet pipe box (11) or the heat exchange medium outlet pipe box (13).

3. A heat exchange module according to claim 1, characterized in that, Each heat exchange plate (6) has an opening at the corner of the plate body at the reversing connection point of two adjacent heat exchange sub-units (21). The opening of each heat exchange plate (6) and the adjacent partition plate (64) enclose a reversing channel (65). After the sewage in one set of heat exchange sub-units (21) passes through the reversing channel (65), it enters another set of heat exchange sub-units (21).

4. A heat exchange module according to any one of claims 1 to 3, characterized in that, The heat exchange plate (6) includes two sets of plates (61) with their edges welded and fixed. The plates (61) are welded and fixed together by uniformly arranged welding points (63). Each welding point (63) is annular with a central hole for sewage to flow between adjacent heat exchange plates (6). The plate cavity of the heat exchange plate (6) is pressurized and expanded so that a flat curved heat exchange medium flow cavity (62) is formed between the four adjacent sets of welding points (63). The opening of each heat exchange medium flow cavity (62) is connected to the adjacent heat exchange medium flow cavity (62).

5. A heat exchange module according to claim 4, characterized in that, Each weld point (63) is an elliptical weld point. A spatial rectangular coordinate system is established with the center point of the weld point (63) as the origin. The arrangement direction of the heat exchange plate (6) corresponds to the plane formed between the Z-axis and X-axis in the spatial rectangular coordinate system. The distance between two sets of weld points (63) arranged opposite each other in the heat exchange medium flow cavity (62) is 2S. T The distance between the other two sets of weld points (63) arranged opposite each other in the heat exchange medium flow chamber (62) is 2S. L The maximum expansion height of the heat exchange medium flow cavity (62) along the Y-axis is δ; then, in the spatial rectangular coordinate system, the contour coordinates of the heat exchange medium flow cavity (62) along the Y-axis are:

6. A heat exchange module according to any one of claims 1 to 3, characterized in that, Two parallel welding lines are provided on the heat exchange plate (6) at the corresponding insertion position of the partition plate (64) to separate the flow channels in the heat exchange plate (6). An insertion channel is formed between the two parallel welding lines for the partition plate (64) to be inserted. The distance between the center lines of two adjacent plates (61) in the heat exchange subunit (21) is 20-50 mm. The thickness of the plate (61) is 0.8-2.0 mm. The material of the plate (61) is one of SUS304 stainless steel, 316L stainless steel, titanium, 2205 stainless steel and 2507 stainless steel.

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