Heat exchange plate, plate heat exchanger and amine method carbon capture system

Abstract

The invention relates to a heat exchange plate, a plate heat exchanger and an amine method carbon capture system. The heat exchange plate is provided with a first side face and a second side face which are opposite in the thickness direction of the heat exchange plate, the heat exchange plate comprises a first heat exchange part and a second heat exchange part, the first heat exchange part forms a groove in the first side face, the groove is provided with a smooth concave face, the first heat exchange part forms a protrusion on the second side face, and the protrusion is provided with a concave face. The protrusions are provided with smooth convex faces, the multiple first heat exchange parts are arranged in an array mode, and the adjacent second heat exchange parts are connected through the second heat exchange parts. According to the heat exchange plate, the blockage problem can be reduced, high-pressure water can be allowed to wash and take away sediments, scaling is not prone to occurring, pressure drop is small, cleaning and maintenance are easy, smooth grooves and smooth protrusions are arranged, heat exchange dead zones and scaling points are not prone to forming, running resistance loss is lower, flowing of fluid is facilitated, the fluid is kept at the high flow speed, and the heat exchange efficiency is improved. And the heat exchange effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of amine-based carbon capture, and in particular to a heat exchange plate, a plate heat exchanger and an amine-based carbon capture system. Background Art

[0002] The sensible heat of temperature rise during the absorbent regeneration process in the amine carbon capture technology accounts for a large part of the energy consumption of absorbent regeneration. The sensible heat of temperature rise is mainly determined by the heat transfer effect of the lean and rich liquid heat exchanger. The heat transfer performance of the plate heat exchanger is generally determined by the heat transfer coefficient between the plates, the internal pressure bearing capacity of the plate heat exchanger, and the mass transfer resistance of the flow channel between the plates. In the related technology, a herringbone plate type plate heat exchanger is used. However, the internal heat transfer coefficient of the herringbone heat exchange plate is low, the flow resistance is large, and it is easy to get blocked. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes a heat exchange plate that can reduce clogging problems and allow high-pressure water to flush and carry away sediments. It is not easy to scale, has a small pressure drop, is easy to clean and maintain, and the smooth grooves and smooth protrusions are not easy to form heat exchange dead zones and scaling points, and the operating resistance loss is lower, which is conducive to the flow of fluid, so that the fluid maintains a high flow rate and the heat exchange effect is better.

[0005] An embodiment of the present invention provides a plate heat exchanger.

[0006] An embodiment of the present invention provides an amine-based carbon capture system.

[0007] According to the heat exchange plate of an embodiment of the present invention, the heat exchange plate has a first side surface and a second side surface opposite to each other in the thickness direction thereof, and the heat exchange plate includes a first heat exchange portion and a second heat exchange portion, the first heat exchange portion forms a groove on the first side surface, and the groove has a smooth concave surface, the first heat exchange portion forms a protrusion on the second side surface, and the protrusion has a smooth convex surface, a plurality of the first heat exchange portions are arranged in a display, and adjacent second heat exchange portions are connected through the second heat exchange portions.

[0008] The first straight section of the amine liquid channel and the second straight section of the coolant channel of the plate heat exchanger in the embodiment of the present invention are conducive to maintaining a high flow rate of the fluid and can reduce blockage problems. The first heat exchange part improves the heat exchange effect. The groove can cause the fluid to form a vortex in the amine liquid channel, and the protrusion can cause the fluid to form a vortex in the coolant channel, thereby strengthening the heat exchange effect of the fluid in the amine liquid channel and the fluid in the coolant channel, and improving the internal heat transfer coefficient of the plate heat exchanger.

[0009] In some embodiments, grooves are laser etched on the heat exchange plate, and the grooves cover the first heat exchange portion and the second heat exchange portion.

[0010] In some embodiments, the grooves on the first side are wavy, and the grooves on the second side are herringbone.

[0011] In some embodiments, the heat exchange plate includes a substrate and a phase change material layer, and the phase change material layer is coated on the substrate.

[0012] In some embodiments, the concave surface of the groove is a spherical concave surface.

[0013] In some embodiments, the center of the groove is located on the side of the extension surface of the second heat exchange portion away from the second side surface.

[0014] In some embodiments, the notch diameter of the groove is 9-11 mm; and / or the maximum distance between the protrusion and the second side surface in the thickness direction of the heat exchange plate is 3-5 mm.

[0015] In some embodiments, the distance between adjacent first heat exchange parts is 2-4 mm.

[0016] The plate heat exchanger of the embodiment of the present invention comprises the heat exchange plates, wherein the first side surfaces of adjacent heat exchange plates are opposite to each other and form an amine liquid channel, the second side surfaces of adjacent heat exchange plates are opposite to each other and form a coolant liquid channel, and the first heat exchange parts of the plurality of heat exchange plates are opposite to each other.

[0017] The amine carbon capture system according to the embodiment of the present invention comprises the plate heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a plate heat exchanger according to an embodiment of the present invention;

[0019] Figure 2 is a partial internal schematic diagram of a plate heat exchanger according to an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of a heat exchange plate according to an embodiment of the present invention;

[0021] Reference numerals:

[0022] Plate heat exchanger 1000;

[0023] Heat exchange plate 100 , first side surface 10 , second side surface 20 , first heat exchange portion 1 , second heat exchange portion 2 , groove 3 , amine liquid channel 200 , coolant channel 300 , first straight section 201 , large capacity section 202 , second straight section 301 , small capacity section 302 . DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0025] Please refer to the attached Figure 1 refer to Figure 3 , the heat exchange plate 100, the plate heat exchanger 1000 and the amine carbon capture system according to the embodiments of the present invention are described in detail.

[0026] The amine carbon capture system according to the embodiment of the present invention includes a heat exchanger 1000 .

[0027] The heat exchanger 1000 according to the embodiment of the present invention includes a heat exchange plate 100 .

[0028] The heat exchange plate 100 of the embodiment of the present invention has a thickness in the direction (eg Figure 1 and Figure 2 The heat exchange plate 100 has a first side surface 10 and a second side surface 20 opposite to each other in the left-right direction in the figure. The heat exchange plate 100 includes a first heat exchange part 1 and a second heat exchange part 2. The first heat exchange part 1 forms a groove on the first side surface 10, and the groove has a smooth concave surface. The first heat exchange part 1 forms a protrusion on the second side surface 20, and the protrusion has a smooth convex surface. Multiple first heat exchange parts 1 are arranged in a display, and adjacent second heat exchange parts 2 are connected through the second heat exchange parts 2.

[0029] The heat exchanger 1000 has a plurality of heat exchange plates 100, the first sides 10 of adjacent heat exchange plates 100 are opposite to each other and form an amine liquid channel 200, the second sides 20 of adjacent heat exchange plates 100 are opposite to each other and form a coolant channel 300, the first heat exchange parts 1 of the plurality of heat exchange plates 100 are opposite to each other, and the second heat exchange parts 2 of the plurality of heat exchange plates 100 are opposite to each other.

[0030] When the heat exchanger 1000 of the embodiment of the present invention is in use, the amine liquid flows through the amine liquid channel 200 , the coolant flows through the coolant channel 300 , and the amine liquid with a higher temperature exchanges heat with the coolant with a lower temperature through the heat exchange plate 100 .

[0031] In the plate heat exchanger 1000 of the embodiment of the present invention, the first side surface 10 of the heat exchange plate 100 is opposite to the first side surface 10 of one of the two adjacent heat exchange plates 100 and forms an amine liquid channel 200, the second side surface 20 of the heat exchange plate 100 is opposite to the second side surface 20 of the other of the two adjacent heat exchange plates 100 and forms a coolant channel 300, and the first heat exchange parts 1 of the plurality of heat exchange plates 100 are opposite in the thickness direction, and the second heat exchange parts 2 of the plurality of heat exchange plates 100 are opposite in the thickness direction. Then, for the amine liquid channel 200, the two opposite second The heat exchange part 2 forms a first straight section 201, and the grooves of the two opposite first heat exchange parts 1 form a large-capacity section 202 that is enlarged relative to the first straight section 201. Then the amine liquid channel 200 includes multiple first straight sections 201 and enlarged large-capacity sections 202; for the coolant channel 300, the two opposite second heat exchange parts 2 form a second straight section 301, and the protrusions of the two opposite first heat exchange parts 1 form a small-capacity section 302 that is reduced relative to the second straight section 301. Then the coolant channel 300 includes multiple second straight sections 301 and reduced small-capacity sections 302.

[0032] The large-capacity through section 202 is a variable-capacity channel with a larger capacity relative to the first straight section 201, and the small-capacity through section 302 is a variable-capacity channel with a smaller capacity relative to the second straight section 301. During the flow of the fluid, the flow rate through the first straight section 201 is greater than the flow rate when flowing through the groove (large-capacity through section 202), and the flow rate of the coolant through the second straight section 301 is greater than the flow rate when flowing through the protrusion (small-capacity through section 302). On the one hand, the amine liquid flows through the large-capacity through section 202 for a longer time, which increases the heat exchange time with the coolant; on the other hand, the fluid vortexes at the position where there is a flow rate difference, such as the protrusion and the groove. The flow velocity difference at the edge of the groove is more obvious, which causes some vortices to appear in the fluid at the edges of the protrusions and grooves. The vortices are beneficial to increase the disturbance of the fluid and can enhance heat exchange. Moreover, when the overall flow velocity of the fluid increases, the vortices increase. Therefore, when the amine liquid channel 200 and the coolant channel 300 are flushed with high pressure and high speed, the disturbance generated by the vortices is beneficial to remove the sediment in the channel. Thirdly, the protrusions and grooves of the first heat exchange part 1 themselves have a large area, which can increase the heat exchange area between the amine liquid and the coolant, thereby improving the heat exchange effect of the amine liquid and the coolant when flowing through the first heat exchange part 1, and increasing the heat exchange effect of the heat exchanger 1000.

[0033] Furthermore, the concave surface of the groove is a smooth concave surface, and the contour of the concave surface of the first heat exchange part 1 is smooth and has no edges and corners. Therefore, when the amine liquid flows through the large-capacity passage 202, the velocity changes more evenly, and it is not easy to form a heat exchange dead zone and a scaling point. For example, the concave surface of the groove is a spherical surface, and the convex surface of the protrusion is a spherical surface; or, the concave surface of the groove is an elliptical spherical surface, and the convex surface of the protrusion is an elliptical spherical surface.

[0034] In addition, the first heat exchange parts 1 of the multiple heat exchange plates 100 of the heat exchanger 1000 are opposite, and the second heat exchange parts 2 of the multiple heat exchange plates 100 are opposite, so the arrangement of the grooves on the multiple heat exchange plates 100 of the plate heat exchanger 1000 is the same, and the arrangement of the protrusions on the multiple heat exchange plates 100 of the plate heat exchanger 1000 is the same, so that different heat exchange plates 100 have the same plate structure, which improves the replaceability of the heat exchange plates 100 and reduces the manufacturing cost of the plate heat exchanger 1000.

[0035] The multiple first heat exchange parts 1 (grooves / protrusions) of the heat exchange plate 100 are arranged in an array, that is, the first heat exchange parts 1 are arranged in the length direction and width direction of the heat exchange plate 100, that is, the multiple first heat exchange parts 1 are arranged in a row along the width direction of the heat exchange plate 100, and the multiple first heat exchange parts 1 in each row are arranged at equal intervals, and the multiple rows of first heat exchange parts 1 are arranged in multiple columns along the length direction of the heat exchange plate 100, and the first heat exchange parts 1 in each column are arranged at equal intervals. The array arrangement of the first heat exchange parts 1 in the length direction and width direction of the heat exchange plate 100 makes the vortex generated by the groove in the amine liquid channel 200 and the vortex generated by the protrusion in the coolant channel 300 evenly distributed, further improving the heat exchange effect of the fluid in the amine liquid channel 200 and the fluid in the coolant channel 300.

[0036] Compared with the herringbone corrugated plate heat exchanger 1000 in the related art, the plate heat exchanger 1000 of the embodiment of the present invention has smooth grooves and smooth protrusions, and the fluid can easily generate vortices at the edges of the protrusions and grooves, generating disturbances to increase heat exchange, and can reduce blockage problems, and can allow high-pressure water to flush and carry away sediments, is not easy to scale, has a small pressure drop, is easy to clean and maintain, and the smooth grooves and smooth protrusions are not easy to form heat exchange dead zones and scaling points, and the operating resistance loss is lower, which is conducive to the flow of the fluid, so that the fluid maintains a high flow rate and the heat exchange effect is better.

[0037] Therefore, the first straight section 201 of the amine liquid channel 200 and the second straight section 301 of the coolant channel 300 of the plate heat exchanger 1000 of the embodiment of the present invention are conducive to maintaining a high flow rate of the fluid and can reduce the blockage problem. The first heat exchange part improves the heat exchange effect. The groove can cause the fluid to form a vortex in the amine liquid channel 200, and the protrusion can cause the fluid to form a vortex in the coolant channel 300, thereby strengthening the heat exchange effect of the fluid in the amine liquid channel 200 and the fluid in the coolant channel 300, and improving the internal heat transfer coefficient of the plate heat exchanger 1000.

[0038] The concave surface of the groove is a spherical concave surface, and correspondingly, the convex surface of the protrusion is a spherical convex surface. Therefore, when manufacturing the heat exchange plate 100, a spherical extrusion die is used to extrude the heat exchange plate 100 to form spherical grooves and protrusions. The spherical concave surface and protrusion are relatively regular, which is convenient for processing and manufacturing the first heat exchange part 1.

[0039] The center of the groove is located on the side of the extension surface of the second heat exchange part 2 away from the second side surface 20, that is, the concave surface of the groove is smaller than half of the corresponding sphere, so that the depth of the groove is small and the opening is large, which can reduce the obstruction of the groove and the protrusion to the flow of the fluid, reduce the loss of fluid flow rate and pressure drop, and keep the fluid at a higher flow rate, further reducing the blockage problem.

[0040] Specifically, the diameter of the notch of the protrusion is 9-11 mm, and the maximum distance between the protrusion and the second side surface 20 in the thickness direction of the heat exchange plate is 3-5 mm. The maximum distance between the protrusion and the second side surface 20 in the thickness direction of the heat exchange plate is the maximum distance between the most convex part of the protrusion (that is, the position of the protrusion corresponding to the most concave part of the groove) and the second side surface 20 in the thickness direction of the heat exchange plate.

[0041] For example, the notch size of the protrusion is 9 mm, 10 mm or 11 mm, and the maximum distance between the second side surface 20 and the protrusion located thereon in the thickness direction of the heat exchange plate is 3 mm, 4 mm or 5 mm.

[0042] In this embodiment, the diameter of the notch of the protrusion is 10 mm, and the maximum distance between the second side surface 20 and the protrusion located thereon in the thickness direction of the heat exchange plate is 4 mm.

[0043] Specifically, the spacing distance between adjacent first heat exchange parts 1 is 2-4 mm.

[0044] For example, the spacing distance between adjacent first heat exchange parts 1 is 2 mm, 3 mm or 4 mm.

[0045] In this embodiment, the distance between adjacent first heat exchange parts 1 is 3 mm.

[0046] In some embodiments, the heat exchange plate 100 is laser-etched with grooves 3, which cover the first heat exchange portion 1 and the second heat exchange portion 2. The grooves 3 further increase the surface area of ​​the first heat exchange portion 1 and the second heat exchange portion 2, thereby increasing the heat exchange area of ​​the fluid, and further improving the heat exchange effect of the fluid in the amine liquid channel 200 and the fluid in the coolant channel 300.

[0047] Furthermore, the groove 3 on the first side surface 10 is in a wave shape, and the groove 3 on the second side surface 20 is in a herringbone shape.

[0048] The continuous curved surface of the wavy groove 3 can reduce the pressure drop, thereby reducing the adverse effect of the pressure drop on the flow of the amine liquid with higher viscosity. The wavy groove 3 has no sharp corners, which is conducive to reducing local deposition and has good anti-scaling ability. The herringbone groove 3 is conducive to inducing secondary swirl flow, further improving the heat exchange effect of the heat exchange plate 100, and the viscosity of the coolant is relatively low, so the herringbone groove 3 has a relatively small effect on the pressure drop of the coolant.

[0049] In some embodiments, the heat exchange plate 100 includes a substrate and a phase change material layer, and the substrate is coated with a phase change material layer. The phase change material layer can store heat energy when there is excess heat, and release the stored heat energy when the fluid temperature is low, so that the heat exchange plate 100 can achieve internal energy storage of the heat exchanger 1000, cope with the temperature fluctuation of the amine liquid, and improve the adaptability of the heat exchanger 1000 of the embodiment of the present invention.

[0050] Specifically, the phase change material layer is any one of copper nanoparticles, copper oxide nanoparticles, aluminum nanoparticles, silicon dioxide nanoparticles, graphite, graphene and carbon fiber.

[0051] Both sides of the substrate in the thickness direction of the heat exchange plate 100 are coated with a phase change material layer.

[0052] The base plate is made of nickel-based alloy plate or bidirectional stainless steel plate to ensure its corrosion resistance.

[0053] When manufacturing the heat exchange plate 100 of the embodiment of the present invention, the groove 3 is firstly laser-etched on the substrate, and then the phase change material is coated on the substrate to form a phase change material layer, and finally the spherical groove is formed by extrusion molding.

[0054] The amine carbon capture system according to the embodiment of the present invention includes the heat exchanger 1000 according to any one of the embodiments.

[0055] Therefore, the amine liquid and the coolant in the amine carbon capture system according to the embodiment of the present invention have good heat exchange effect.

[0056] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A heat exchange plate (100), characterized in that: The heat exchange plate (100) has a first side surface (10) and a second side surface (20) opposite to each other in the thickness direction thereof. The heat exchange plate (100) comprises a first heat exchange portion (1) and a second heat exchange portion (2). The first heat exchange portion (1) forms a groove on the first side surface (10), and the groove has a smooth concave surface. The first heat exchange portion (1) forms a protrusion on the second side surface (20), and the protrusion has a smooth convex surface. A plurality of the first heat exchange portions (1) are arranged in a display, and adjacent second heat exchange portions (2) are connected via the second heat exchange portions (2).

2. The heat exchange plate (100) according to claim 1, characterized in that: A groove (3) is laser-etched on the heat exchange plate (100), and the groove (3) covers the first heat exchange portion (1) and the second heat exchange portion (2).

3. The heat exchange plate (100) according to claim 2, characterized in that: The groove (3) on the first side surface (10) is in a wave shape, and the groove (3) on the second side surface (20) is in a herringbone shape.

4. The heat exchange plate (100) according to claim 1, characterized in that: The heat exchange plate (100) comprises a substrate and a phase change material layer, wherein the phase change material layer is coated on the substrate.

5. The heat exchange plate (100) according to claim 1, characterized in that: The concave surface of the groove is a spherical concave surface.

6. The heat exchange plate (100) according to claim 5, characterized in that: The center of the groove is located on the side of the extension surface of the second heat exchange portion (2) that is away from the second side surface (20).

7. The heat exchange plate (100) according to claim 6, characterized in that: The notch diameter of the groove is 9-11 mm; and / or the maximum distance between the protrusion and the second side surface (20) in the thickness direction of the heat exchange plate is 3-5 mm.

8. The heat exchange plate (100) according to claim 5, characterized in that: The distance between adjacent first heat exchange parts (1) is 2-4 mm.

9. A plate heat exchanger (1000), characterized in that: The heat exchange plate (100) comprises the heat exchange plate (100) according to any one of claims 1 to 8, wherein the first side surfaces (10) of adjacent heat exchange plates (100) are opposite to each other and form an amine liquid channel (200), the second side surfaces (20) of adjacent heat exchange plates (100) are opposite to each other and form a coolant channel (300), and the first heat exchange parts (1) of a plurality of the heat exchange plates (100) are opposite to each other.

10. An amine carbon capture system, characterized in that: Comprising the plate heat exchanger (1000) as claimed in claim 9.

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