Heat exchange module and plate type anti-dirt heat exchanger

Abstract

The invention relates to the field of heat exchangers, in particular to a heat exchange module and a plate-type anti-fouling heat exchanger, the heat exchange module comprises two groups of box-type heat exchange subunits, heat exchange plates are arranged in each heat exchange subunit in parallel at intervals, inner cavities of the heat exchange plates form heat exchange medium flow channels, sewage flow channels are formed between the adjacent heat exchange plates, and the sewage flow channels are communicated with the heat exchange subunits. The partition plates and the heat exchange plates are arranged in a crossed and staggered mode and inserted into the sewage flow channels and the heat exchange medium flow channels at the same time, the sewage flow channels and the heat exchange medium flow channels are divided into S-shaped flow channels, and the flow directions of the sewage flow channels and the heat exchange medium flow channels in all the heat exchange subunits are opposite. While the size of the heat exchanger is reduced, it can be guaranteed that the heat exchanger has high heat exchange efficiency, and the interior of the heat exchanger is not prone to being blocked.

Description

Technical Field

[0001] The invention relates to the field of heat exchangers, in particular to a heat exchange module and a plate-type anti-fouling heat exchanger. Background Art

[0002] With the rapid development of heat exchanger technology, non-clean working fluid heat exchangers, such as floating head heat exchangers and U-tube heat exchangers, have been developed for special scenarios with non-clean working fluids such as crude oil chemical industry, textile, industrial wastewater containing solid particles, sewage / mud containing biomass, etc. It is very difficult to achieve long-term stable and efficient heat transfer in the field of process fluid heat exchange with non-clean working fluids. In such use scenarios, even if the performance of the heat exchanger is satisfactory when it is just running, the surface of the heat transfer element that contacts the non-clean working fluid side will quickly "get dirty", and even further form a biofilm on the surface, causing the overall heat exchange efficiency of the heat exchanger to deteriorate rapidly. It must be disassembled regularly, shut down for manual cleaning, or use complex special online cleaning devices, resulting in high operating costs and labor costs.

[0003] Although floating head heat exchangers and U-tube heat exchangers are suitable for heat exchange of non-clean working fluids, their heat exchange efficiency is usually much lower than that of conventional plate heat exchangers, and they cannot achieve efficient extraction and utilization of the energy contained in the convective working fluid. If a plate heat exchanger is used for heat exchange, in order to ensure the passability of the working fluid in the non-clean side channel and avoid blockage by large particles, a larger channel is often used on the non-clean working fluid side, resulting in a low single-sided convective heat transfer coefficient on the non-clean working fluid side. The plate heat exchanger is large in size, and it is difficult to extract heat from non-clean working fluids. The heat exchange efficiency and heat exchanger volume cannot be achieved at the same time, so it is urgent to solve this problem. Summary of the invention

[0004] In order 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 can reduce the volume of the heat exchanger while ensuring that the heat exchanger has a high heat exchange efficiency and is not prone to blockage inside the heat exchanger.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A heat exchange module comprises a box-type heat exchange sub-unit, each heat exchange sub-unit is provided with heat exchange plates in parallel and at intervals, the inner cavity of the heat exchange plates constitutes a heat exchange medium flow channel, and the adjacent heat exchange plates constitute a sewage flow channel, the partition plates are cross-arranged with the heat exchange plates and inserted into the sewage flow channel and the heat exchange medium flow channel at the same time, and the sewage flow channel and the heat exchange medium flow channel are separated into S-shaped flow channels, and the sewage flow channel and the heat exchange medium flow channel in each heat exchange sub-unit flow direction are opposite.

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

[0008] As a further solution of the present invention: two groups of heat exchange medium interfaces are opened on each heat exchange plate in the vertical direction, one group of heat exchange medium interfaces is connected to the heat exchange medium reversing pipe box, and the other group 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 solution of the present invention: each heat exchange plate is provided with an opening at the corner end of the plate body corresponding to the reversing connection between two adjacent heat exchange sub-units, and the opening of each heat exchange plate and the adjacent partition plate are enclosed to form a reversing channel, and the sewage in one group of heat exchange sub-units enters the other group of heat exchange sub-units after passing through the reversing channel.

[0010] As a further solution of the present invention: the heat exchange plate includes two groups of plates fixed by edge welding, and the plate bodies of the two plates are welded and fixed by evenly arranged welding points, each welding point is annular, and a hole is opened in the center to allow sewage to flow between two 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 adjacent four groups of welding points, and the opening of each heat exchange medium flow cavity is connected to the adjacent heat exchange medium flow cavity.

[0011] Each welding point is an elliptical welding point. The center point of the welding point is used as the origin to establish a spatial rectangular coordinate system. The plate arrangement direction of the heat exchange plate corresponds to the plane formed between the Z axis and the X axis in the spatial rectangular coordinate system. The spacing between two sets of welding points arranged oppositely in the heat exchange medium flow cavity is 2S. T The distance between the other two sets of welding points arranged opposite to each other in the heat exchange medium flow cavity is 2S L , the maximum bulging 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 on the Y axis are:

[0012]

[0013] As a further solution of the present invention: two parallel welding lines are arranged on the heat exchange plate at the plug-in position corresponding to the partition plate to separate the flow channel in the heat exchange plate, and a plug-in channel is formed between the two parallel welding lines for the partition plate to be inserted; the spacing between the center lines of two adjacent plates in the heat exchange sub-unit is 20-50 mm, the thickness of the plate is 0.8-2.0 mm, and the material of the plate 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, in which at least one group of the heat exchange modules is arranged in a box of the heat exchanger, along the arrangement direction of the heat exchange sub-units in the box, the sewage flow channel of the heat exchange sub-unit at the head end of the box is connected with the sewage inlet pipe, the sewage flow channel of the heat exchange sub-unit at the tail end of the box is connected with the sewage outlet pipe, the sewage flow channels in two adjacent heat exchange sub-units are connected through a reversing channel, and the sewage travels along an S-shaped trajectory after being reversed in each heat exchange sub-unit through each reversing channel.

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

[0016] As a further solution of the present invention: after the actual heat exchange rate of the heat exchanger drops below 85% of the rated heat exchange rate, the inlet and outlet directions of the heat exchange medium inlet joint and the heat exchange medium outlet joint are swapped, and the inlet and outlet directions of the sewage inlet pipe and the sewage outlet pipe are swapped to reversely flush the heat exchange medium flow channel and the sewage flow channel.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention adopts a staggered layout design of the partition plates, and at the same time, the heat exchange medium flow channel of the heat exchange plate cavity and the sewage flow channel in the heat exchange subunit are designed in an S-shaped flow channel. There are only heat exchange plates and partition plates in the entire heat exchanger, without any pipeline connection structure, and there are no blockage points and flow dead zones in the internal space. While reducing the volume of the heat exchanger, it can ensure that the heat exchanger has a higher heat exchange efficiency and it is not easy to get blocked inside the heat exchanger.

[0019] 2. The present invention is formed by a series-parallel design of heat exchange sub-units, so that multiple heat exchange modules can be freely combined, spliced ​​and expanded to meet the use of different working conditions; the design of double interfaces on the heat exchange plate can simultaneously supply heat exchange medium to each heat exchange plate in the heat exchange sub-unit and simultaneously export heat exchange medium through the design of the pipe box on the box body, and with the help of the reversing pipe box, the two groups of heat exchange sub-units in the heat exchange module can be reversed, effectively extending the flow path of the heat exchange medium.

[0020] 3. The heat plate of the present invention is a non-rectangular plate, and has an opening at the end of the reversing channel of the sewage flow channel. The opening and the partition plate are enclosed to form a reversing channel. After the unclean media in each sewage flow channel in any heat exchange sub-unit converge in the reversing channel, they enter the reversing channel of the adjacent heat exchange sub-unit along the reversing channel in one group of heat exchange sub-units, thereby realizing the reversal of the unclean working medium.

[0021] 4. Although the overall flow rate of the present invention is tortuous, the heat exchange medium and the unclean working fluid are all pure countercurrent heat exchange in both the overall and local flow paths. For the local clean working fluid and unclean working fluid heat exchange unit, the flow paths of the surrounding heat exchange units are opposite to them; and the inlet and outlet water directions of the unclean working fluid and the heat exchange medium in the heat exchanger can be switched regularly. While maintaining pure countercurrent heat exchange, the surface of the heat exchange plate is reversely flushed, and the flow direction is repeatedly switched, thereby achieving the removal of dirt on the heat exchange surface and realizing the self-cleaning function of the heat exchanger.

[0022] 5. The heat exchange module of the present invention is of central symmetric design. An external piping system is used to provide heat exchange medium and non-clean working fluid input and output for the heat exchange sub-units in each heat exchange module. The detachable design of the box end cover allows the box end cover and the drain port at the bottom of the box to be opened when there is a long-term large amount of dirt deposition or regular maintenance. The dirt can be quickly removed by flushing with a high-pressure water gun to restore the heat transfer performance.

[0023] 6. The bulged heat exchange plate of the present invention forms a three-dimensional variable space structure inside, which greatly improves the heat exchange efficiency compared with the flat pure plate cavity structure. Through three-dimensional expansion, the process heat capacity flow rates on both sides are matched to be close or the same, and the series and parallel connection of the pipelines on the outside of the shell is utilized to achieve overall heat exchange optimization while maximizing the utilization of space layout; the elliptical design of the welding point and the central opening allow non-clean working fluids to flow in series and converge on both sides of the heat exchange plate after passing through the central hole of the welding point, thereby achieving turbulence enhancement. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 2 It is a schematic structural diagram of the first embodiment of the heat exchange plate in the present invention.

[0026] Figure 3 It is a schematic structural diagram of the second embodiment of the heat exchange plate in the present invention.

[0027] Figure 4 It is a schematic diagram of the arrangement of the heat exchange plates in the box body in the present invention.

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

[0029] Figure 6It is a schematic diagram of switching of the inlet and outlet flow paths during reverse flushing of the present invention.

[0030] In the figure:

[0031] 1. Box body; 11. Heat exchange medium inlet pipe box;

[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 joint; 31. Heat exchange medium inlet shunt pipe;

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

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

[0037] 6. heat exchange plate; 61. plate; 62. heat exchange medium flow cavity;

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

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figures 1 to 5 In an embodiment of the present invention, a heat exchange module and a plate-type anti-fouling heat exchanger, the box body 1 of the heat exchanger is composed of at least one group of heat exchange modules 2 arranged horizontally side by side. The present invention takes the arrangement of two groups of heat exchange modules 2 as an example, each group of heat exchange modules 2 includes two groups of heat exchange sub-units 21 arranged horizontally side by side, the heat exchange sub-units 21 are box-type structures, and the shells of each heat exchange sub-unit 21 are of an integrated structure.

[0041] Multiple groups of heat exchange plates 6 are vertically arranged inside the heat exchange subunit 21. The heat exchange plates 6 include two groups of plates 61. The edges of the two plates 61 are welded and fixed to the box body 1. The two plates 61 are welded and fixed by evenly arranged welding points 63. After the two groups of plates 61 are pressurized, a bulging three-dimensional space is formed between the welding points 63. Specifically, the plates 61 are made of two metal plates stacked together and formed by laser or resistance welding. Then the inlet and outlet pipes are connected, and the remaining edge parts of the plates are sealed again by laser or resistance welding. Finally, they are formed by hydraulic bulging.

[0042] The arrangement of the welding points 63 is to form a multi-row arrangement on the vertical plate surface of the plate 61, the spacing between the welding points 63 in each row is equal, and the welding points 63 in two adjacent rows are arranged in a staggered manner in the vertical position. Figure 5 As shown, the heat exchange medium flow cavity 62 is formed between four groups of diamond-shaped welding points 63. There are multiple groups of heat exchange medium flow cavities 62, and the heat exchange medium flow cavities 62 at non-edges have four openings, each of which is connected to an adjacent heat exchange medium flow cavity 62, so that the heat exchange medium can flow in the bulging three-dimensional space in the heat exchange plate 6. The welding points 63 are preferably annular elliptical welding points, and the central holes of the welding points 63 can allow the external medium on both sides of the heat exchange plate 6 to flow and converge.

[0043] A spatial rectangular coordinate system is established with the center point of the welding point 63 as the origin. The arrangement direction of the plate surface of the heat exchange plate 6 corresponds to the plane formed between the Z axis and the X axis in the spatial rectangular coordinate system. The spacing between two sets of welding points 63 arranged opposite to each other in the heat exchange medium flow cavity 62 is 2S. T The distance between the other two groups of welding points 63 arranged opposite to each other in the heat exchange medium flow cavity 62 is 2S L , the maximum bulging 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 on the Y axis are:

[0044]

[0045] Two groups of heat exchange medium interfaces 66 are respectively provided at the top and bottom of the heat exchange plate 6, one group of heat exchange medium interfaces 66 is the inlet of the heat exchange plate 6, and the other group of heat exchange medium interfaces 66 is the outlet of the heat exchange plate 6. The inlet and outlet positions of the heat exchange plate 6 are different according to the different positions in the box body 1. An even number of heat exchange subunits 21 are usually arranged in the heat exchanger, and the inlet and outlet positions of the heat exchange plates 6 in two adjacent heat exchange subunits 21 are opposite, but usually the inlet and outlet vertical positions of each heat exchange plate 6 correspond.

[0046] The heat exchange plate 6 is provided with welds in the horizontal direction, and the number of welds is usually an odd number. The welds extend from one side of the plate 61 to the other side, and the starting points of two adjacent groups of welds are respectively located on both sides of the plate 6, thereby forming a staggered arrangement, dividing the plate cavity of the heat exchange plate 6 to form an S-shaped heat exchange medium flow channel, so that the heat exchange medium flows from top to bottom or from bottom to top in an S-shaped trajectory.

[0047] The horizontal welds on the heat exchange plates 6 are preferably double-long weld lines, and a long strip-shaped notch matching the thickness of the partition plate 64 is provided in the double-long weld line for the partition plate 64 to be inserted. Multiple groups of heat exchange plates 6 share one group of partition plates 64 at the corresponding height. A sewage flow channel is formed between two adjacent groups of heat exchange plates 6 and the partition plate 64. The sewage in this embodiment refers to all non-clean working fluids. The sewage flow channel is the same as the heat exchange medium flow channel, and is also an S-shaped flow channel, except that the sewage flow channel in each heat exchange subunit 21 flows in the opposite direction to the heat exchange medium flow channel.

[0048] There are two layout forms of the heat exchange plate 6, such as Figure 2 As shown, in the first embodiment, there is only one group of heat exchange modules, and at this time there is only one group of heat exchange sub-units 21 adjacent to the heat exchange sub-units 21, and the corner end of the heat exchange plate 6 adjacent to one group of heat exchange medium interfaces 66 is provided with an opening, and the opening is a rectangular notch, and the opening is opposite to the sewage inlet or sewage outlet in the upper and lower positions.

[0049] like Figure 3 As shown, in the second embodiment, at least two groups of heat exchange modules are combined, and the heat exchange plates 6 of the heat exchange subunits 21 on the edges of both sides are still Figure 2 As shown, for the middle heat exchange subunit 21, both adjacent sides have heat exchange subunits 21, and the corner ends of the two adjacent groups of heat exchange medium interfaces 66 of the heat exchange plate 6 are opened, and the openings are rectangular notches, such as Figure 3 shown.

[0050] In the above two embodiments, the opening of the heat exchange plate 6 and the box body 1 enclose a reversing channel 65. After the sewage in each heat exchange subunit 21 flows from top to bottom or from bottom to top along an S-shaped trajectory, it enters the adjacent heat exchange subunit 21 through the reversing channel 65, forming an S-shaped flow trajectory opposite to the adjacent heat exchange subunit 21. The top of the box body between the two groups of heat exchange modules 2 is closed to prevent the heat exchange subunit 21 at this position from being filled with water from the top and bottom at the same time. The spacing between the center lines of two adjacent plates 61 in the heat exchange subunit 21 is 20 to 50 mm, the thickness of the plate 61 is 0.8 to 2.0 mm, and the material of the plate 61 is one of SUS304 stainless steel, 316L stainless steel, titanium, 2205 stainless steel and 2507 stainless steel.

[0051] The sewage inlet pipe 51 and the sewage outlet pipe 52 are respectively located at the bottom of the heat exchange subunit 21 on both sides of the box body 1, and supply sewage to the heat exchange subunit 21 in the horizontal direction. The overall flow trajectory of each sewage flow channel is S-shaped, and the overall sewage flow trajectory between each heat exchange subunit 21 is as follows: Figure 1 As shown by the arrow in the middle, it is also S-shaped.

[0052] Along the arrangement direction of the heat exchange subunits 21, the heat exchange medium inlet pipe box 11 and the heat exchange medium outlet pipe box 13 are alternately arranged at the bottom of each heat exchange subunit 21, wherein the heat exchange medium outlet pipe box 13 is arranged at the bottom of the heat exchange subunit 21 corresponding to the sewage inlet pipe 51, and the heat exchange medium inlet pipe box 11 is arranged at the bottom of the heat exchange subunit 21 corresponding to the sewage outlet pipe 52. A heat exchange medium reversing pipe box 12 is arranged at the top of each heat exchange module 2, and the heat exchange medium in one group of heat exchange subunits 21 enters another group of heat exchange subunits 21 after reversing through the heat exchange medium reversing pipe box 12 to change the flow direction of the heat exchange medium. Removable end covers are arranged at the front and rear ends of the box body 1, and the end cover 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 and fixed to the end covers. A sewage outlet can be opened at the bottom of each heat exchange module 2 at the bottom of the box body 1 for sewage discharge under maintenance conditions. The heat exchange medium inlet joint 3 provides heat exchange medium to each heat exchange medium inlet pipe box 11 after being diverted by the heat exchange medium inlet diverter pipe 31; the heat exchange medium outlet joint 4 receives the heat exchange medium from each heat exchange medium outlet pipe box 13 after being diverted by the heat exchange medium outlet diverter pipe 41; according to the different numbers of heat exchange modules 2, the heat exchange medium inlet joint 3 and the heat exchange medium outlet joint 4 are designed as a three-way or multi-way structure.

[0053] Under normal heat exchange working conditions, the double-sided bulging heat exchange plate 6 has a smooth surface and no dirt spots, and the heat exchange module 2 has no common components that are easy to cause dirt deposition and blockage, such as pipes, fluid distributors, and intermediate connecting pipes, which can ensure long-term operation. In case of blockage or maintenance, the drainage ports at the bottom of the box 1 are opened at the same time, and the dirt or solid particle impurities are discharged from the drainage port at the bottom of the box 1 by increasing the flow rate and flow rate of the shell-side fluid, and then the drainage port is closed; in some extreme blockages that cause the flow path to be blocked or when the equipment is under regular inspection and maintenance, the end cover of each heat exchange module can be opened, and the drainage port at the bottom of the box 1 can be opened at the same time, and the dirt on the outside of the heat exchange plate 6 can be directly flushed in both directions with a high-pressure water gun, and the accumulated dirt on the shell side can be directly removed, so that the heat exchanger can restore its performance.

[0054] When the actual heat exchange of the heat exchanger drops below 85% of the rated heat exchange, the heat exchange medium inlet joint 3 and the heat exchange medium outlet joint 4 are swapped, and the sewage inlet pipe 51 and the sewage outlet pipe 52 are swapped to reversely flush the heat exchange medium flow channel and the sewage flow channel. Figure 6As shown, the heat exchanger 6 switches the flow path between the following two operating conditions.

[0055] Working condition 1: The heat exchange medium enters the plate side pipeline c through the plate side tee a, enters the heat exchange plate 6 from the plate side a (i.e., the heat exchange medium inlet joint 3) through the plate side pipeline c, exchanges heat with the unclean working medium on the shell side, flows out from the plate side b (i.e., the heat exchange medium outlet joint 4) to the plate side tee b, and finally leaves the heat exchanger. At the same time, the unclean working medium enters the shell side pipeline c from the shell side tee b, enters the heat exchanger from the shell side b (i.e., the sewage inlet pipe 51) to exchange heat with the heat exchange plate 6, and flows out to the shell side tee a through the shell side a (i.e., the sewage outlet pipe 52), and finally leaves the heat exchanger.

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

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

[0058] Taking the Reynolds number as a variable, when the heat exchange medium, heat exchange velocity and flow rate are the same, 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 when other working conditions are the same, 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 the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0062] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

Claims

1. A heat exchange module, characterized in that: The heat exchange module (2) comprises two groups of box-type heat exchange sub-units (21), each heat exchange sub-unit (21) is provided with heat exchange plates (6) in parallel and at intervals, the inner cavity of the heat exchange plates (6) constitutes a heat exchange medium flow channel, and the adjacent heat exchange plates (6) constitute a sewage flow channel. The partition plate (64) and the heat exchange plates (6) are arranged crosswise and inserted into the sewage flow channel and the heat exchange medium flow channel at the same time, so as to separate 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) have opposite flow directions.

2. A heat exchange module according to claim 1, characterized in that: Two groups of heat exchange subunits (21) are arranged in the heat exchange module (2), and the sewage and heat exchange medium in the two adjacent heat exchange subunits (21) form an S-shaped flow trajectory along the vertical direction. The upper and lower ends of one of the two heat exchange subunits (21) are respectively provided with a heat exchange medium inlet pipe box (11) and a heat exchange medium reversing pipe box (12), and the upper and lower ends of the other subunit are respectively provided with a heat exchange medium outlet pipe box (13) and a heat exchange medium reversing pipe box (12). The heat exchange medium in one group of heat exchange subunits (21) enters the other group of heat exchange subunits (21) after being reversed by the heat exchange medium reversing pipe box (12).

3. A heat exchange module according to claim 2, characterized in that: Two groups of heat exchange medium interfaces (66) are provided on each heat exchange plate (6) in a vertical direction, one group of heat exchange medium interfaces (66) is connected to the heat exchange medium reversing pipe box (12), and the other group 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).

4. A heat exchange module according to claim 2, characterized in that: Each heat exchange plate (6) is provided with an opening at a corner end of the plate body corresponding to the reversing connection between 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); sewage in one group of heat exchange sub-units (21) passes through the reversing channel (65) and then enters another group of heat exchange sub-units (21).

5. A heat exchange module according to any one of claims 1 to 4, characterized in that: The heat exchange plate (6) comprises two groups of plates (61) fixed by edge welding, the plate bodies of the two plates (61) are welded and fixed by evenly arranged welding points (63), each welding point (63) is annular, and a hole is opened in the center to allow sewage to flow between two adjacent heat exchange plates (6); the plate cavity of the heat exchange plate (6) is pressurized and expanded so that a flat curved surface heat exchange medium flow cavity (62) is formed between four adjacent groups of welding points (63), and the opening of each heat exchange medium flow cavity (62) is connected to the adjacent heat exchange medium flow cavity (62).

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

7. A heat exchange module according to any one of claims 1 to 4, characterized in that: Two parallel welding lines are arranged on the heat exchange plate (6) at the insertion position corresponding to the partition plate (64) to separate the flow channel in the heat exchange plate (6), and a plug-in channel is formed between the two parallel welding lines for the partition plate (64) to be inserted; the spacing between the center lines of two adjacent plates (61) in the heat exchange subunit (21) is 20 to 50 mm, the thickness of the plate (61) is 0.8 to 2.0 mm, and the material of the plate (61) is one of SUS304 stainless steel, 316L stainless steel, titanium, 2205 stainless steel and 2507 stainless steel.

8. A plate-type anti-fouling heat exchanger, characterized in that: The heat exchanger housing (1) is provided with at least one set of heat exchange modules (2) as claimed in any one of claims 1 to 4. Along the arrangement direction of the heat exchange subunits (21) in the housing (1), the sewage flow channel of the heat exchange subunit (21) at the head end of the housing (1) is connected to the sewage inlet pipe (51), and the sewage flow channel of the heat exchange subunit (21) at the tail end of the housing (1) is connected to the sewage outlet pipe (52). The sewage flow channels in two adjacent heat exchange subunits (21) are connected through a reversing channel (65), and the sewage travels along an S-shaped trajectory after being reversed in each heat exchange subunit (21) through each reversing channel (65).

9. A heat exchange module and plate-type anti-fouling heat exchanger according to claim 8, characterized in that: The heat exchange medium inlet joint (3) provides heat exchange medium to each heat exchange medium inlet pipe box (11) after being split by the heat exchange medium inlet splitter pipe (31); the heat exchange medium outlet joint (4) receives heat exchange medium from each heat exchange medium outlet pipe box (13) after being split by the heat exchange medium outlet splitter pipe (41).

10. A heat exchange module and plate type anti-fouling heat exchanger according to claim 8, characterized in that: After the actual heat exchange of the heat exchanger drops below 85% of the rated heat exchange, the inlet and outlet directions of the heat exchange medium inlet joint (3) and the heat exchange medium outlet joint (4) are reversed, and the inlet and outlet directions of the sewage inlet pipe (51) and the sewage outlet pipe (52) are reversed to reversely flush the heat exchange medium flow channel and the sewage flow channel.

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