A high-efficiency all-welded plate heat exchanger and its application method

Abstract

This invention provides a high-efficiency fully welded plate heat exchanger and its usage method, comprising an upper sealing plate and a lower sealing plate, which are fixedly connected by a mounting bracket and partitions. Multiple heat exchange plates are fixedly installed between the partitions, and each heat exchange plate has symmetrical corrugated channels on its outer surface. Adjacent heat exchange plates form heat exchange channels through these corrugated channels. Compared with traditional flat plate heat exchangers, this invention offers a larger surface area and higher heat transfer efficiency. Furthermore, due to its corrugated structure, it can accommodate more fluid channels, thereby improving the mixing efficiency of liquids. By improving the structure of the plate heat exchanger, especially in the geometry of the heat exchange plates and the design of the corrugated channels, this invention significantly improves heat transfer efficiency, reduces flow resistance, and lowers system energy consumption.

Description

Technical Field

[0001] This invention relates to the field of plate heat exchanger technology, and in particular to a high-efficiency fully welded plate heat exchanger and its usage method. Background Technology

[0002] With the increasing severity of global climate change, carbon dioxide (CO2) emissions have become a growing global concern. Chemical absorption (CEA), a primary CO2 capture technology, plays a crucial role in industrial CO2 capture. CEA utilizes MEA solutions to absorb carbon dioxide and is widely used in industries such as thermal power generation and steel manufacturing.

[0003] Traditional heat exchangers play a crucial role in heat transfer in chemical absorption systems; however, these processes are energy-intensive, especially during heat exchange. Existing heat exchangers still suffer from low heat exchange efficiency, uneven fluid flow, and limited heat transfer area. Therefore, improving heat exchange efficiency, reducing flow resistance, and optimizing heat exchanger plate design are important directions in current heat exchanger research. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency fully welded plate heat exchanger and its application method, which is applied to a chemical absorption carbon capture system to improve the heat exchange efficiency of carbon dioxide absorbent. By optimizing the structure and geometry of the heat exchange plates, the heat exchange efficiency is improved while reducing flow resistance and improving the overall system performance.

[0005] According to one objective of the present invention, the present invention provides a high-efficiency fully welded plate heat exchanger, comprising an upper sealing plate and a lower sealing plate, wherein the upper sealing plate and the lower sealing plate are fixedly connected by a mounting bracket and a partition; a plurality of heat exchange plates are fixedly installed between the partitions, and the outer surface of each heat exchange plate is provided with symmetrical corrugated channels, and adjacent heat exchange plates form heat exchange channels through the corrugated channels.

[0006] Furthermore, the partition is installed at equal intervals between the upper sealing plate and the lower sealing plate.

[0007] Furthermore, side plates are fixedly installed on all four sides of the upper sealing plate and the lower sealing plate.

[0008] Furthermore, an inlet pipe is fixedly installed on the outer surface of each of the two adjacent side plates, and an outlet pipe is fixedly installed on the outer surface of each of the two adjacent side plates.

[0009] Furthermore, the corrugated channel has a corrugation angle of 45° and a corrugation depth of 2mm.

[0010] Furthermore, the hydraulic diameter of the corrugated channel is 4 mm.

[0011] Furthermore, the heat exchange plate is made of SUS304 stainless steel and has a thickness of 1mm.

[0012] Furthermore, the heat exchange area of ​​a single heat exchange plate is 0.00833㎡, and the total heat exchange area is 0.816㎡.

[0013] Furthermore, the cross-sectional area of ​​a single corrugated channel is 1.7 × 10⁻⁶. -4 ㎡, the cross-sectional area of ​​a single flow is 1.197×10 -3 ㎡.

[0014] According to another objective of the present invention, the present invention provides a method of using the above-mentioned high-efficiency all-welded plate heat exchanger, comprising the following steps:

[0015] The heat exchanger is introduced with the liquid to be exchanged, and the heat exchange fluid medium is introduced through the corrugated channels between the heat exchange plates. The inlet and outlet of the corrugated channels are connected so that the internal heat exchange fluid medium circulates from the inlet and outlet. The heat exchange plates are in full contact with the liquid to be exchanged, so that the heat exchange fluid medium carries away the excess temperature inside the liquid. The liquid is discharged after heat exchange is completed, which improves the heat exchange efficiency between the liquid and the heat exchange medium.

[0016] Compared with traditional flat plate heat exchangers, the technical solution of this invention has a larger surface area and higher heat transfer efficiency. At the same time, due to its corrugated structure, it can accommodate more fluid channels, thereby improving the mixing efficiency of liquids. By improving the structure of the plate heat exchanger, especially in the geometry of the heat exchange plate and the design of the corrugated channels, this invention significantly improves the heat transfer efficiency, reduces flow resistance, and lowers the energy consumption of the system. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the mounting bracket according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the heat exchange plate in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the flow direction of the heat exchange fluid medium in the corrugated channel according to an embodiment of the present invention.

[0023] In the diagram: 1. Upper sealing plate; 2. Lower sealing plate; 3. Side plate; 4. Inlet pipe; 5. Outlet pipe; 6. Corrugated channel; 7. Mounting bracket; 8. Baffle plate; 9. Heat exchange plate. Detailed Implementation

[0024] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Example 1

[0028] like Figures 1-5 As shown,

[0029] A high-efficiency fully welded plate heat exchanger includes an upper sealing plate 1 and a lower sealing plate 2, which are aligned vertically. Side plates 3 are fixedly installed on all four sides of the upper sealing plate 1 and the lower sealing plate 2. Liquid inlet pipes 4 are fixedly installed on the outer surfaces of two adjacent side plates 3, and liquid outlet pipes 5 are fixedly installed on the outer surfaces of two adjacent side plates 3.

[0030] like Figure 2 As shown, the upper sealing plate 1 and the lower sealing plate 2 are fixed by a mounting bracket 7 and a partition plate 8. Specifically, a mounting bracket 7 is fixedly installed between the upper sealing plate 1 and the lower sealing plate 2, and multiple partition plates 8 are evenly fixedly installed at equal intervals on the inner wall of the mounting bracket 7. The multiple partition plates 8 are installed at equal intervals between the upper sealing plate 1 and the lower sealing plate 2, and multiple heat exchange plates 9 are fixedly installed at equal intervals between two adjacent partition plates 8.

[0031] like Figure 3 and Figure 4 As shown, each heat exchange plate 9 has two corrugated channels 6 symmetrically opened on its outer surface. The heat exchange plates 9 are interlocked in pairs, so that the two corrugated channels 6 on their outer surfaces form a pipe structure, thereby improving the efficiency of heat transfer.

[0032] In this embodiment, the heat exchange plate 9 has a size of 100 mm × 100 mm and a thickness of 1 mm. The heat exchange plate 9 is made of SUS304 stainless steel. SUS304 stainless steel has excellent corrosion resistance and is resistant to many chemicals, acids, alkalis and salts. At the same time, SUS304 can maintain its structural integrity and resist oxidation at high temperatures, making it suitable for chemical absorption carbon capture systems.

[0033] like Figure 4 As shown, in this embodiment, the corrugation angle of the corrugated channel 6 is 45°, the ripple depth of the corrugated channel 6 is 2 mm, and the hydraulic diameter of the corrugated channel 6 is 4 mm. The cross-sectional area of ​​a single flow channel of a single corrugated channel 6 is 1.7 × 10⁻⁶. -4 The single-pass cross-sectional area of ​​corrugated channel 6 is 1.197 × 10 m². -3 ㎡.

[0034] In this embodiment, the number of heat exchange plates 9 is set to 100, the heat exchange area of ​​a single heat exchange plate 9 is 0.00833㎡, and the total heat exchange area of ​​the heat exchange plates 9 is 0.816㎡.

[0035] In use, the heat exchanger of this invention introduces the liquid to be exchanged through the inlet pipe 4, and then introduces the heat exchange fluid medium through the corrugated channel 6 between the heat exchange plates 9. The inlet and outlet of the corrugated channel 6 are connected, so that the internal heat exchange fluid medium circulates from the inlet and outlet. The heat exchange plates 9 are in full contact with the liquid to be exchanged, so that the heat exchange fluid medium carries away the excess temperature inside the liquid. The liquid after heat exchange is completed is discharged from the outlet pipe 5. This device improves the heat exchange efficiency between liquids.

[0036] In this embodiment, the heat exchange plate 9 is made of SUS304 stainless steel, a material that exhibits excellent performance in chemical absorption carbon capture systems, maintaining long-term stable operation in high-temperature and corrosive environments. The corrugated channel design optimizes fluid flow, improving heat transfer efficiency. Furthermore, the removable structure of the heat exchanger facilitates cleaning and maintenance, reducing equipment downtime.

[0037] The heat exchanger of the present invention sends the liquid to be heat exchanged into the heat exchanger through the liquid inlet pipe, and the heat exchange fluid in the corrugated channel carries away the heat from the liquid, thereby improving the heat exchange efficiency of the liquid.

[0038] This invention significantly improves heat transfer efficiency, reduces flow resistance, and lowers system energy consumption by improving the structure of plate heat exchangers, particularly in the geometry of the heat exchange plates and the design of the corrugated channels. Furthermore, this invention enhances the corrosion resistance and high-temperature stability of the equipment, making it highly suitable for harsh industrial environments.

[0039] Compared with traditional flat plate heat exchangers, this invention has a larger surface area and higher heat transfer efficiency. At the same time, due to its corrugated structure, it can accommodate more fluid channels, thereby improving the mixing efficiency of liquids and liquids. Furthermore, the shape of the plates can enhance the rigidity and pressure resistance of the plates to a certain extent.

[0040] The plate heat exchanger of this invention also features removable and washable side plates for routine maintenance and cleaning. This design reduces downtime and makes the heat exchanger more durable and long-lasting, as users can replace damaged parts when needed.

[0041] The heat transfer coefficient of the all-welded plate heat exchanger of this invention is much higher than that of the traditional shell-and-tube heat exchanger. For a carbon capture system with 30 wt% MEA absorbent, when the absorbent flow velocity in the corrugated channel is 0.1 to 0.7 m / s, the heat transfer coefficient of the all-welded plate heat exchanger is 858-2891 W / m2·K.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-efficiency all-welded plate heat exchanger, characterized in that, The device includes an upper sealing plate and a lower sealing plate, which are fixedly connected by a mounting bracket and a partition. Multiple heat exchange plates are fixedly installed between the partitions. Each heat exchange plate has symmetrical corrugated channels on its outer surface, and adjacent heat exchange plates form heat exchange channels through these corrugated channels. The corrugated channel has a corrugation angle of 45° and a corrugation depth of 2 mm. The hydraulic diameter of the corrugated channel is 4 mm. The cross-sectional area of ​​a single corrugated channel is 1.7 × 10⁻⁶. -4 m 2 The cross-sectional area of ​​a single flow path is 1.197 × 10⁻⁶. -3 m 2 .

2. The high-efficiency fully welded plate heat exchanger according to claim 1, characterized in that, The partition is installed at equal intervals between the upper sealing plate and the lower sealing plate.

3. The high-efficiency fully welded plate heat exchanger according to claim 1, characterized in that, Side plates are fixedly installed on all four sides of the upper sealing plate and the lower sealing plate.

4. The high-efficiency fully welded plate heat exchanger according to claim 3, characterized in that, An inlet pipe is fixedly installed on the outer surface of each of the two adjacent side plates, and an outlet pipe is fixedly installed on the outer surface of each of the two adjacent side plates.

5. The high-efficiency fully welded plate heat exchanger according to claim 1, characterized in that, The heat exchange plate is made of SUS304 stainless steel and has a thickness of 1mm.

6. The high-efficiency fully welded plate heat exchanger according to claim 1, characterized in that, The heat exchange area of ​​a single heat exchange plate is 0.00833 m². 2 The total heat exchange area is 0.816m². 2 .

7. The method of using the high-efficiency fully welded plate heat exchanger according to claim 1, characterized in that, Includes the following steps: The heat exchanger is introduced with the liquid to be exchanged, and the heat exchange fluid medium is introduced through the corrugated channels between the heat exchange plates. The inlet and outlet of the corrugated channels are connected so that the internal heat exchange fluid medium circulates from the inlet and outlet. The heat exchange plates are in full contact with the liquid to be exchanged, so that the heat exchange fluid medium carries away the excess temperature inside the liquid. The liquid is discharged after heat exchange is completed, which improves the heat exchange efficiency between the liquid and the heat exchange medium.

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