Three-dimensional variable-space bulging heat exchange plate and equal-flow-path closed heat exchanger

Abstract

The invention relates to the field of heat exchangers, in particular to a three-dimensional variable-space bulging heat exchange plate and an equal-flow-path closed heat exchanger. The heat exchange plate comprises two sets of plate pieces with the edges welded and fixed, plate bodies of the two plate pieces are welded and fixed through evenly-arranged welding spots, a plate cavity of the heat exchange plate is pressurized and expanded to form a plurality of sets of heat exchange medium flowing cavities, and each heat exchange medium flowing cavity takes four sets of welding spots arranged in a rhombus shape as boundary points. Openings of the heat exchange medium flowing cavities are formed between the two adjacent sets of welding spots of the upper plate piece and the lower plate piece, and the openings of the heat exchange medium flowing cavities are communicated with the adjacent heat exchange medium flowing cavities. 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 blockage.

Description

Technical Field

[0001] The invention relates to the field of heat exchangers, in particular to a three-dimensional variable space bulging heat exchange plate and a constant flow path closed heat exchanger. Background Art

[0002] With the rapid development of heat exchanger technology, non-clean working fluid heat exchangers have been developed for special scenarios of non-clean working fluids such as crude oil chemical industry, textile, industrial wastewater containing solid particles, sewage / mud containing biomass, etc. The current traditional heat exchanger, as described in the publication number "CN106403397A", ​​includes an air inlet manifold, a liquid outlet manifold, and a plurality of heat exchange tubes connected between the air inlet manifold and the liquid outlet manifold. The multiple heat exchange tubes are arc-shaped and arranged at intervals in the radial direction. This type of annular heat exchange tube and plate structure has a heat exchange medium flow channel formed in the tube body or plate body for the clean working fluid to flow, and a non-clean working fluid flow channel is formed between adjacent heat exchange tubes.

[0003] In order to ensure the passability of the working fluid in the non-clean side channel and avoid clogging by large particles, the non-clean working fluid flow channel is often wider, resulting in a low one-sided convective heat transfer coefficient of the heat exchange medium flow channel, a large heat exchanger volume, and difficulty in extracting heat from the non-clean working fluid. The heat exchange efficiency and the 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 three-dimensional variable space bulging heat exchange plate and a closed heat exchanger with equal flow path. 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 three-dimensional variable space bulging heat exchange plate, the heat exchange plate comprises two groups of plates fixed by edge welding, the plate bodies of the two plates are welded and fixed by evenly arranged welding points, the plate cavity of the heat exchange plate is pressurized and bulged to form multiple groups of heat exchange medium flow cavities, each heat exchange medium flow cavity has four groups of diamond-shaped welding points as boundary points, and the opening of the heat exchange medium flow cavity is formed between two adjacent groups of welding points of the upper and lower plates, and each opening of the heat exchange medium flow cavity is connected to the adjacent heat exchange medium flow cavity.

[0007] As a further solution of the present invention: the welding point is a circular welding point, and a spatial rectangular coordinate system is established with the center of the welding point as the origin. 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 in opposition to each other at a long distance in the heat exchange medium flow cavity is 2S. T The distance between the other two sets of welding points arranged in close opposition 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:

[0008]

[0009] A closed heat exchanger with equal flow path, wherein a three-dimensional variable space bulging heat exchange plate is concentrically arranged in a barrel-shaped shell, N rings of annular heat exchange plates are coaxially arranged in the shell, and the flow path of each heat exchange plate increases arithmetically from the inside to the outside; the inner cavity of the heat exchange plate constitutes a heat exchange medium flow channel, and the sewage flow channel is formed between adjacent heat exchange plates; partition welding lines are vertically arranged on the heat exchange plate, and the partition welding lines divide the heat exchange medium flow channel of the heat exchange plate into two groups of independent heat exchange areas; the two heat exchange areas of each heat exchange plate are provided with a heat exchange medium inlet joint and a heat exchange medium outlet joint; the heat exchange medium outlet joint of one group of heat exchange areas in the i-th circle of heat exchange plates is connected with the heat exchange medium inlet joint of one group of heat exchange areas in the N+1-i-th circle of heat exchange plates through a distribution pipe to form N groups of heat exchange medium channels with the same flow rate.

[0010] As a further solution of the present invention: the heat exchange medium inlet joint and the heat exchange medium outlet joint are both arranged at the bottom of each heat exchange zone, and the heat exchange plates located in each heat exchange zone are provided with separation welds, the separation welds include vertical welds and staggered horizontal welds, and a medium rising channel corresponding to the position of the heat exchange medium inlet joint is formed between the vertical welds and the edge of the heat exchange plate, and an S-shaped flow channel is formed between the horizontal welds, and the two ends of the S-shaped flow channel are respectively connected to the medium rising channel and the heat exchange medium outlet joint.

[0011] As a further solution of the present invention: a heat exchange medium inlet pipe and a heat exchange medium outlet pipe are arranged on the shell, and the heat exchange medium inlet pipe transports the heat exchange medium to the corresponding heat exchange zone through the inlet branch pipe; the heat exchange medium outlet pipe receives the heat exchange medium discharged from the corresponding heat exchange zone through the outlet branch pipe.

[0012] As a further solution of the present invention: equal flow holes are evenly opened along the circumferential direction on the welding line at the bottom of each heat exchange plate to connect the sewage flow channels on both sides of the heat exchange plate.

[0013] As a further solution of the present invention: the top of the heat exchange plate is provided with an exhaust hole connected to the heat exchange medium flow channel, the corner end of the top of the heat exchange plate is opened to form an overflow port for sewage to pass through, and the overflow port of each heat exchange plate corresponds to the height of the sewage outlet pipe on the shell.

[0014] As a further solution of the present invention: a sewage pipe box connected to the sewage inlet pipe is arranged at the bottom of the shell, and distribution holes corresponding to the positions of each sewage flow channel are opened on the sewage pipe box, and each distribution hole provides sewage to each sewage flow channel from bottom to top; a sewage outlet for discharging sewage to the outside is arranged at the bottom of the shell, and a sewage discharge joint is opened on the sewage pipe box outside the shell.

[0015] As a further solution of the present invention: the opening on the top of the shell is closed by a cover, and an inspection hole is provided on the cover, and the exhaust holes on each heat exchange plate are located within the projection range of the inspection hole along the vertical direction; reinforcing ribs are evenly arranged along the radial direction on the cover, and the cover is also provided with lifting ears for lifting the cover.

[0016] As a further solution of the present invention: a driving shaft is axially arranged in the shell, and the driving shaft is driven to rotate by a driving motor. A cleaning rod is fixed on the driving shaft and is radially arranged along the shell. There is an installation gap between the cover and the heat exchange ring plate for the cleaning rod to rotate. Brushes are arranged vertically at intervals on the cleaning rod, and the brush surface of the brush is in contact with the plate surface of the corresponding heat exchange plate.

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

[0018] 1. The present invention performs an expansion design on the heat exchange plate and obtains the optimal expansion profile of the heat exchange plate by calculation to maximize the heat exchange efficiency. While reducing the volume of the heat exchanger, it can ensure that the heat exchanger has a high heat exchange efficiency and is not prone to blockage inside the heat exchanger.

[0019] 2. The equal flow path design of the heat exchange medium flow channel of the present invention ensures that when the heat exchange medium passes through the inside of the heat exchanger, the flow cross-sectional area and flow length of all heat exchange medium flow paths are exactly the same, thereby achieving uniform distribution of the heat exchange medium flow rate, fully utilizing the heat of the clean working fluid, improving the heat exchange efficiency, and avoiding the influence of heat exchange on the inner and outer circle flow paths of the concentric circle design heat exchange tube being inconsistent.

[0020] 3. The non-clean working fluid of the present invention is distributed to the sewage flow channel between adjacent heat exchange plates through the distribution holes of the sewage pipe box, flows from bottom to top and converges through the overflow port and then flows out from the sewage outlet pipe. The flow paths in the vertical direction are the same, forming a sewage flow path with equal flow paths to ensure uniform heat exchange.

[0021] 4. There are no pipeline obstacles between adjacent heat exchange plates of the present invention. The cleaning rod is driven by a motor to rotate, which will make the raw sewage have a concentric rotation speed in the horizontal direction. On the one hand, this rotation increases the flow rate of the sewage itself and increases turbulent disturbance. On the other hand, the soft bristles on the brush group directly physically contact the heat exchange surface of the heat exchange plate to remove dirt and biofilm deposition that may be generated by long-term operation. The outer side of the plate always remains in a "brand new" state. While physically removing the biofilm or dirt deposited on the surface, the wall thermal resistance on the sewage side is made to 0, maintaining the heat exchange performance of the heat exchanger, and achieving the dual purposes of "preventive self-cleaning" and "non-clean side turbulence heat exchange enhancement". BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is a schematic diagram of the structure of the heat exchange ring plate after being spread out in the present invention.

[0024] Figure 3 The figure is a schematic diagram of the flow path trajectory of the heat exchange medium distributed by the two groups of heat exchange plates through the distribution pipes in the present invention.

[0025] Figure 4 It is a partial cross-sectional view of the heat exchange plate in the present invention.

[0026] Figure 5 It is a schematic diagram of the structural layout of the heat exchange ring plate in the present invention.

[0027] Figure 6 It is a schematic diagram of the structure of the sealing cover in the present invention.

[0028] In the figure:

[0029] 1. Shell; 11. Heat exchange medium inlet pipe; 111. Inlet branch pipe;

[0030] 12. Heat exchange medium outlet pipe; 121. Outlet branch pipe;

[0031] 13. Distribution pipe; 14. Sewage inlet pipe;

[0032] 141. Sewage pipe box; 142. Distribution hole; 143. Sewage connection;

[0033] 15. Sewage outlet pipe; 16. Sewage outlet;

[0034] 2. Cover; 21. Inspection hole; 22. Lifting lug; 23. Reinforcement rib;

[0035] 3. driving motor; 4. driving shaft; 5. cleaning rod; 51. brush;

[0036] 6. Heat exchange plate; 60. Partition welding line; 61. Plate; 62. Heat exchange medium flow cavity; 63. Welding point;

[0037] 64. Heat exchange medium inlet joint; 65. Heat exchange medium outlet joint;

[0038] 66. Overflow port; 67. Exhaust hole; 68. Separation welding line; 69. Flow equalizing hole. 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 6 In an embodiment of the present invention, a three-dimensional variable space bulging heat exchange plate and an equal flow path closed heat exchanger, the shell 1 is a barrel-shaped structure with an open top, and a cover 2 is installed at the bottom opening.

[0041] The cover 2 is coaxially fixed to the top of the shell 1. The cover 2 can be fixed to the shell 1 by integral welding or by bolts. An inspection hole 21 is provided on the cover 2. The exhaust holes 67 of each heat exchange plate 6 are located within the projection range of the inspection hole 21 in the vertical direction, ensuring that maintenance personnel can directly open and close the exhaust holes 67 through the inspection hole 21. Reinforcement ribs 23 are evenly arranged on the top of the cover 2 along the radial direction, and lifting ears 22 are provided on the cover 2 for lifting operations.

[0042] A plurality of circles of heat exchange plates 6 are coaxially arranged in the shell 1, and each heat exchange plate 6 is provided with two symmetrically arranged partition welding lines 60 along the vertical direction. The partition welding lines 60 divide the plate cavity of the heat exchange plate 6 into two groups of independent heat exchange zones, and the inner cavities of the two heat exchange zones constitute independent heat exchange medium flow channels.

[0043] The heat exchange plate 6 is a hollow plate, which is bent and welded to form an annular plate. The heat exchange plate 6 includes two groups of plates 61, the edges of the two plates 61 are welded and fixed, and 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 each welding point 63. Specifically, the plate 61 is formed by laser or resistance welding after two metal plates are overlapped, and then the inlet and outlet pipes are connected, and the remaining edge of the plate is sealed again by laser or resistance welding, and finally, it is formed by hydraulic bulging.

[0044] The arrangement of the welding points 63 is to form a multi-row arrangement on the vertical plate surface of the plate 61, and 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. The heat exchange medium flow cavity 62 is formed between the 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 the opening of the adjacent heat exchange medium flow cavity 62, so that the heat exchange medium can flow in the three-dimensional space bulging in the heat exchange plate 6. The welding point 63 is preferably a circular ring welding point, and the central hole of the welding point 63 can allow the medium on both sides of the heat exchange plate 6 to pass through.

[0045] A spatial rectangular coordinate system is established with the center of the welding point 63 as the origin. The 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 distance between two groups of welding points 63 arranged in opposition to each other at a long distance in the heat exchange medium flow cavity 62 is 2S. T The distance between the other two groups of welding points 63 arranged in close opposition 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:

[0046]

[0047] An annular sewage flow channel is formed between adjacent heat exchange ring plates, and each circle of sewage flow channels is in a connected state. A driving motor 3 is arranged on the cover 2, and the driving motor 3 controls the rotation of the driving shaft 4 through a reducer. The driving shaft 4 extends axially along the shell 1 into the shell 1. A cleaning rod 5 is fixed on the driving shaft 4, and the rod body of the cleaning rod 5 is arranged along the diameter direction of the shell 1. A brush 51 corresponding to the height of the heat exchange ring plate is vertically arranged on the cleaning rod 5. Preferably, two groups of brushes 51 are symmetrically arranged in each sewage flow channel. When the driving motor 3 drives the cleaning rod 5 to rotate through the driving shaft 4, the brush surface of the brush 51 fits the plate body of the heat exchange plate 6 on both sides of the brush 51, and the heat exchange plate 6 is brushed and cleaned.

[0048] A sewage pipe box 141 is provided at the bottom of the shell 1, and the sewage pipe box 141 is connected to the sewage inlet pipe 14. A plurality of distribution holes 142 are opened on the sewage pipe box 141. The number of the distribution holes 142 corresponds to the number of sewage flow channels. The distribution holes 142 are preferably rectangular holes. A sewage discharge joint 143 is also provided on the sewage pipe box 141, which is used to independently discharge the sludge in the sewage pipe box 141 after opening.

[0049] The outer plate 61 of the heat exchange plate 6 located in the outermost circle is 0.3-0.5 mm thicker than the inner plate. Only one set of arc-shaped overflow ports 66 is opened on the top of the heat exchange plate 6 in the outermost circle, which is used to communicate with the sewage outlet pipe 15. Two sets of symmetrically arranged overflow ports 66 are opened on the top of the heat exchange plates 6 in other circles. The interface of the sewage outlet pipe 15 corresponds to the height of the overflow ports 66 of the heat exchange plate 6. The sewage flowing from bottom to top for heat exchange passes through the overflow ports 66 and is discharged outward along the sewage outlet pipe 15. An independent sewage outlet 16 is provided at the bottom of the shell 1. When the heat exchanger is cleaned, the dirt or impurities generated by cleaning are directly discharged outward through the sewage outlet 16. Compared with the sewage inlet pipe 14, the sewage outlet pipe 15 should be larger in size, and its top should be 2-5 cm lower than the total height of the heat exchange plate 6. The arrangement height of the heat exchange medium inlet pipe 11 and the heat exchange medium outlet pipe 12 is preferably higher than the height of the sewage inlet pipe 14 and the sewage pipe box 141.

[0050] When the heat exchange plate 6 is laid flat, the exhaust holes 67 of the two heat exchange zones of the heat exchange plate 6 are both located at the top of the heat exchange plate 6. After the heat exchange plate 6 is bent and closed, the exhaust holes 67 of the two heat exchange zones of the heat exchange plate 6 are arranged adjacent to each other for subsequent maintenance, cleaning and debugging. The heat exchange medium inlet joint 64 and the heat exchange medium outlet joint 65 are located at the two corner ends of the bottom of each heat exchange zone, and receive or inject the heat exchange medium in the vertical direction. Separation welding lines 68 are provided on the plate bodies of the two heat exchange zones of the heat exchange plate 6 to change the flow path of the heat exchange medium in the heat exchange plate 6. The trajectory of the separation welding line 68 is not limited, and the flow path of the heat exchange medium between the heat exchange medium inlet joint 64 and the heat exchange medium outlet joint 65 can be extended.

[0051] In this embodiment, the separation welding line 68 includes a vertical welding line and a horizontal welding line. The vertical welding line corresponds to the position of the heat exchange medium inlet joint 64. The vertical welding line and the weld on one side of the heat exchange plate 6 enclose a medium rising channel. After the heat exchange medium enters the heat exchange plate 6 from the heat exchange medium inlet joint 64, it rises to the top of the heat exchange plate 6 along the medium rising channel. Horizontal welding lines are staggered between the vertical welding line and the weld on the other side of the heat exchange plate 6. An S-shaped horizontal flow channel is formed between the horizontal welding lines. After the heat exchange medium enters the horizontal flow channel from the medium rising channel, it flows from top to bottom in the horizontal flow channel in an S-shaped trajectory and finally leaves the heat exchange medium outlet joint 65.

[0052] From inside to outside, the flow path of the heat exchange medium of each circle of heat exchange plates 6 increases equidistantly, and the heat exchange areas of two groups of heat exchange plates 6 located in different circles are connected through the distribution pipe 13, thereby forming a heat exchange medium channel.

[0053] The number of circles of the heat exchange plates 6 is not limited. When the heat exchange plates 6 have N circles, the heat exchange medium outlet joint 65 of one group of heat exchange zones in the i-th circle of heat exchange plates 6 is connected to the heat exchange medium inlet joint 64 of one group of heat exchange zones in the N+1-i-th circle of heat exchange plates 6 through the distribution pipe 13. The distribution pipes 13 are preferably arranged in parallel with each other.

[0054] In this embodiment, nine circles of heat exchange plates 6 are set as an example, and the two groups of heat exchange areas of each circle of heat exchange plates 6 are heat exchange area A and heat exchange area B. The two groups of heat exchange areas of each circle of heat exchange plates 6 are connected through 9 groups of distribution pipes 13, thereby forming nine heat exchange medium channels with the same flow rate. The specific connection method is as follows:

[0055] 1A-9B, 2A-8B, 3A-7B, 4A-6B, 5A-5B, 6A-4B, 7A-3B, 8A-2B, 9A-1B.

[0056] Among them, 1A-9B indicates that the heat exchange area A of the first circle of heat exchange plates 6 is connected to the heat exchange area B of the ninth circle of heat exchange plates 6 from the inside to the outside through the distribution pipe 13. The heat exchange medium inlet joint 64 of the heat exchange area A of the first circle of heat exchange plates 6 is connected to the heat exchange medium inlet pipe 11 on the shell 1 through the inlet branch pipe 111, the heat exchange medium outlet joint 65 of the heat exchange area A of the first circle of heat exchange plates 6 is connected to the heat exchange medium inlet joint 64 of the heat exchange area B of the ninth circle of heat exchange plates 6 through the distribution pipe 13, and the heat exchange medium outlet joint 65 of the heat exchange area B of the ninth circle of heat exchange plates 6 is connected to the heat exchange medium outlet pipe 12 through the outlet branch pipe 121. The connections of the remaining pipelines correspond to the above connection methods, and so on.

[0057] The number of inlet branch pipes 111 and outlet branch pipes 121 corresponds to the number of heat exchange plates 6, and is used to evenly distribute the heat exchange medium and converge the heat exchange medium. Flow equalization holes 69 are evenly spaced on the weld at the bottom of the heat exchange plate 6. After the heat exchange plate 6 is bent into a ring shape, the flow equalization holes 69 are evenly arranged along the circumference of the heat exchange plate 6. Sewage in adjacent sewage channels in the heat exchanger can flow freely through the flow equalization holes 69. The horizontal channel width formed by the horizontal weld line at the bottom of the heat exchange area is about 5 cm higher than the horizontal channel width at other heights. The flow equalization hole 69 is opened at a height of 1 cm from the weld line at the bottom of the heat exchange plate 6, and the diameter of the flow equalization hole 69 is preferably greater than 3 cm.

[0058] When the heat exchanger is started, first open the inspection hole 21 on the cover 2, and inject clean water as the heat exchange medium into each heat exchange plate 6 through the heat exchange medium inlet pipe 11. Clean water passes through the heat exchange medium channel 1A-9B. At this time, the exhaust holes 67 on the two groups of heat exchange plates 1A-9B are all opened. After the air in the heat exchange medium channel 1A-9B is completely emptied, close the exhaust holes 67 on the two groups of heat exchange plates 1A-9B, and then completely empty the air in each heat exchange medium channel by analogy, close the inspection hole 21, tighten the fixing bolts of the inspection hole 21, open the sewage inlet pipe 14, and after the liquid level is flush with the inspection hole 21, drive the drive motor 3 to drive the sewage to rotate through the brush 51, and remove the accumulated dirt on the surface of the heat exchanger 6 through physical contact. Then loosen the fixing bolts of the inspection hole 21 at intervals, and tighten the fixing bolts of the inspection hole 21 again after the gas in the sewage channel in the heat exchanger 6 is completely exhausted. After the sealing is completed, the valve of the sewage outlet pipe 15 is opened, and the heat exchanger is started.

[0059] In the operating state, the sewage outside the heat exchanger enters the sewage channels of the heat exchanger through the distribution hole 142 of the sewage pipe box 141, and flows freely through the equalizing hole 69, so that the sewage level in the heat exchanger is balanced. When the driving motor 3 drives the brush 51 to rotate, the raw sewage will have a concentric rotation speed in the horizontal direction. This rotation will produce two beneficial effects. On the one hand, the flow rate of the fluid itself increases, increasing turbulent disturbance. On the other hand, the soft bristles on the brush group directly physically contact the heat exchange surface of the heat exchange plate 6, removing the dirt and biofilm deposition that may be generated by long-term operation, and the outer side of the plate always maintains a "brand new" state.

[0060] When draining and inspecting and maintaining, close the sewage outlet pipe 15, open the sewage outlet 16 at the bottom of the heat exchanger and the sewage outlet joint 143 on the sewage pipe box 141, and the sewage flows out through the sewage outlet 16 and the sewage outlet joint 143 under the action of gravity. After the sewage is completely drained, open the inspection hole 21 and use a high-pressure water gun to flush from the top downward to remove the accumulated dirt at the opening of the distribution hole 142 of the sewage pipe box 141. In addition, the sewage inlet pipe 14 and the sewage pipe box 141 can be directly cleaned with a high-pressure water gun. Dirt or impurities can be directly discharged from the sewage outlet 16 by cleaning with a water gun.

[0061] 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 annular heat exchange plate formed by bending 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.

[0062] Table 1

[0063]

[0064] 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.

[0065] 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 three-dimensional variable space bulging heat exchange plate, characterized in that: The heat exchange plate (6) comprises two groups of plate sheets (61) fixed by edge welding, the plate bodies of the two plate sheets (61) are welded and fixed by evenly arranged welding points (63), the plate cavity of the heat exchange plate (6) is pressurized and expanded to form a plurality of groups of heat exchange medium flow cavities (62), each heat exchange medium flow cavity (62) has four groups of diamond-shaped arranged welding points (63) as boundary points, and the opening of the heat exchange medium flow cavity (62) is formed between two adjacent groups of welding points (63) of the upper and lower plate sheets (61), and each opening of the heat exchange medium flow cavity (62) is connected to an adjacent heat exchange medium flow cavity (62).

2. The three-dimensional variable space bulging heat exchange plate according to claim 1, characterized in that: The welding point (63) is a circular welding point. A spatial rectangular coordinate system is established with the center 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 in opposition to each other at a long distance in the heat exchange medium flow cavity (62) is 2S. T The distance between the other two groups of welding points (63) arranged in close opposition 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 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:

3. A closed heat exchanger with equal flow path, characterized in that: A three-dimensional variable space bulging heat exchange plate as claimed in claim 1 or 2 is coaxially arranged in a barrel-shaped shell (1), and N rings of annular heat exchange plates (6) are coaxially arranged in the shell (1), and the flow path of each heat exchange plate (6) increases arithmetic difference from the inside to the outside; the inner cavity of the heat exchange plate (6) constitutes a heat exchange medium flow channel, and the adjacent heat exchange plates (6) constitute a sewage flow channel; a partition welding line (60) is vertically arranged on the heat exchange plate (6), and the partition welding line (60) divides the heat exchange of the heat exchange plate (6) The medium flow channel is divided into two groups of independent heat exchange areas; the two heat exchange areas of each heat exchange plate (6) are provided with a heat exchange medium inlet joint (64) and a heat exchange medium outlet joint (65); the heat exchange medium outlet joint (65) of one group of heat exchange areas in the i-th circle of heat exchange plates (6) is connected to the heat exchange medium inlet joint (64) of one group of heat exchange areas in the N+1-i-th circle of heat exchange plates (6) through a distribution pipe (13), so as to form N groups of heat exchange medium channels with the same flow rate.

4. The equal flow path closed heat exchanger according to claim 3, characterized in that: The heat exchange medium inlet joint (64) and the heat exchange medium outlet joint (65) are both arranged at the bottom of each heat exchange zone. The heat exchange plates (6) located in each heat exchange zone are each provided with a separation weld line (68). The separation weld line (68) includes a vertical weld line and staggered horizontal weld lines. A medium ascending channel corresponding to the position of the heat exchange medium inlet joint (64) is formed between the vertical weld line and the edge of the heat exchange plate (6). An S-shaped flow channel is formed between each horizontal weld line. Both ends of the S-shaped flow channel are respectively connected to the medium ascending channel and the heat exchange medium outlet joint (65).

5. The equal flow path closed heat exchanger according to claim 3, characterized in that: The shell (1) is provided with a heat exchange medium inlet pipe (11) and a heat exchange medium outlet pipe (12); the heat exchange medium inlet pipe (11) transports the heat exchange medium to the corresponding heat exchange zone through the inlet branch pipe (111); and the heat exchange medium outlet pipe (12) receives the heat exchange medium discharged from the corresponding heat exchange zone through the outlet branch pipe (121).

6. The equal flow path closed heat exchanger according to claim 3, characterized in that: Flow equalizing holes (69) are evenly opened in the circumferential direction on the welding line at the bottom of each heat exchange plate (6) to connect the sewage flow channels on both sides of the heat exchange plate (6).

7. The equal flow path closed heat exchanger according to claim 3, characterized in that: The top of the heat exchange plate (6) is provided with an exhaust hole (67) connected to the heat exchange medium flow channel, and the corner end of the top of the heat exchange plate (6) is opened to form an overflow port (66) for sewage to pass through, and the overflow port (66) of each heat exchange plate (6) corresponds in height to the sewage outlet pipe (15) on the shell (1).

8. The equal flow path closed heat exchanger according to claim 7, characterized in that: A sewage pipe box (141) connected to the sewage inlet pipe (14) is arranged at the bottom of the shell (1), and distribution holes (142) corresponding to the positions of the sewage flow channels are opened on the sewage pipe box (141), and each distribution hole (142) provides sewage to each sewage flow channel from bottom to top; a sewage outlet (16) for discharging sewage to the outside is arranged at the bottom of the shell (1), and a sewage discharge joint (143) is opened on the sewage pipe box (141) outside the shell (1).

9. The equal flow path closed heat exchanger according to claim 3, characterized in that: The opening at the top of the shell (1) is closed by a cover (2), and an inspection hole (21) is provided on the cover (2). The exhaust holes (67) on each heat exchange plate (6) are located within the projection range of the inspection hole (21) along the vertical direction. Reinforcing ribs (23) are evenly arranged on the cover (2) in a radial direction, and a lifting lug (22) for lifting the cover (2) is also provided on the cover (2).

10. The equal flow path closed heat exchanger according to claim 9, characterized in that: A driving shaft (4) is axially arranged in the shell (1), and the driving shaft (4) is driven to rotate by a driving motor (3). A cleaning rod (5) is fixed on the driving shaft (4) and is radially arranged in the shell (1). An installation gap exists between the sealing cover (2) and the heat exchange ring plate to allow the cleaning rod (5) to rotate. Vertically arranged brushes (51) are arranged at intervals on the cleaning rod (5), and the brush surface of the brush (51) contacts the plate surface of the corresponding heat exchange plate (6).

Images