A surface regenerator

Abstract

This invention belongs to the technical field of gas turbine auxiliary equipment, specifically relating to a surface regenerator. It includes corrugated plates; the corrugated plates include a first corrugated plate and a second corrugated plate; the first and second corrugated plates are elongated strips, with the two ends of the first corrugated plate fixed to the two ends of the second corrugated plate respectively, forming a closed loop; the first and second corrugated plates are arranged parallel to each other and rolled up to form a rolled structure; corrugated flow channels connecting the two end faces of the rolled structure are provided on the upper and lower surfaces of both the first and second corrugated plates; a first medium flow channel is formed inside the closed loop, and a second medium flow channel is formed outside the closed loop. The surface regenerator proposed in this invention is integrally wound with corrugated plates, resulting in a simple structure that transforms the heat exchange medium from advection to turbulence, improving heat exchange efficiency and increasing the heat exchange area while maintaining the same length and number of spiral turns.

Description

Technical Field

[0001] This invention belongs to the technical field of gas turbine auxiliary equipment, and specifically relates to a surface regenerator. Background Technology

[0002] Gas turbines are classified into heavy-duty gas turbines, light-duty gas turbines, and micro gas turbines. With changes in energy structure and the continuous development of distributed energy, micro gas turbines have also been widely used in some fields. Unlike heavy-duty gas turbines, micro gas turbines use a simple cycle, consisting of a compressor, combustion chamber, and turbine. They do not have a combined cycle waste heat recovery furnace to recover heat from the flue gas. The flue gas temperature discharged from a micro gas turbine is as high as 500℃-700℃. Direct emission would result in significant energy waste. Typically, a regenerator is installed at the gas turbine outlet. The regenerator is a gas-to-gas heat exchanger used to exchange heat between the compressed air from the compressor and the exhaust gas from the turbine. This increases the temperature of the air entering the combustion chamber, raising the combustion temperature, and reduces the flue gas temperature, thereby improving the thermal efficiency of the gas turbine and reducing fuel consumption.

[0003] Existing regenerators include tube-fin type, plate type, plate-fin type, and single-surface type, which have technical defects such as low heat transfer efficiency, large size and heavy weight. Summary of the Invention

[0004] In view of this, the present invention proposes a surface regenerator, which is integrally wound with corrugated plates. The structure is simple, and the heat exchange medium is transformed from laminar flow to turbulent flow, thereby improving the heat exchange efficiency and increasing the heat exchange area with the same length and number of spiral turns.

[0005] To achieve the above-mentioned technical objectives, the specific technical solution adopted by the present invention is as follows:

[0006] A surface regenerator includes a corrugated plate; the corrugated plate includes a first corrugated plate and a second corrugated plate.

[0007] The first corrugated plate and the second corrugated plate are elongated corrugated plates. One end of the first corrugated plate is fixedly connected to one end of the second corrugated plate, and the other end of the first corrugated plate is fixedly connected to the other end of the second corrugated plate. The first corrugated plate and the second corrugated plate form a closed loop. The first corrugated plate and the second corrugated plate are arranged in parallel and rolled up to form a rolled structure.

[0008] The upper and lower surfaces of the first and second corrugated plates are provided with corrugated flow channels that connect the two end faces of the roll structure; a first medium flow channel is formed inside the closed ring, and a second medium flow channel is formed outside the closed ring.

[0009] Furthermore, the surface regenerator also includes:

[0010] A spacer is provided on both ends of the roll structure to divide the roll structure into a first medium flow area and a second medium flow area that are separated from each other.

[0011] The edge strip, disposed between the first corrugated plate and the second corrugated plate, is used to cooperate with the partition strip to close the second medium flow channel in the first medium flow area at the end face of the roll structure, and also to cooperate with the partition strip to close the first medium flow channel in the second medium flow area at the end face of the roll structure.

[0012] Furthermore, the surface regenerator also includes:

[0013] An irregularly shaped end cap, fixed to one end face of the roll structure, serves as the sole inlet for all the first medium flow areas.

[0014] Furthermore, the surface regenerator also includes:

[0015] A sleeve, disposed in the axial core region of the coiled structure, is used to form the winding core of the first corrugated plate and the second corrugated plate.

[0016] Furthermore, the distribution direction of the corrugated flow channels is parallel to the central axis of the roll structure.

[0017] Furthermore, the corrugated flow channel is a continuous S-shaped flow channel.

[0018] Furthermore, the cross-section of the corrugated flow channel is rectangular.

[0019] Furthermore, the upper surface of the corrugated plate is composed of corrugated channels and corrugated protrusions of the same shape arranged at intervals; the corrugated protrusions on the upper surface of the corrugated plate are the outer surface material of the corrugated channels on the lower surface of the corrugated plate.

[0020] Furthermore, the lower surface of the corrugated plate is composed of corrugated channels and corrugated protrusions of the same shape arranged at intervals; the corrugated protrusions on the lower surface of the corrugated plate are the outer surface material of the corrugated channels on the upper surface of the corrugated plate.

[0021] Furthermore, the corrugated plate is made by a stamping process.

[0022] Furthermore, the edge strip is welded onto the roll structure.

[0023] Furthermore, the corrugated plate is located at the beginning and end of the winding of the rolled structure as a transition section; the cylindrical outer surface of the rolled structure is fitted with an outer plate and a reinforcing steel strip.

[0024] By adopting the above technical solution, the present invention can bring the following beneficial effects:

[0025] The surface regenerator of this invention can be integrally molded, reducing welding workload. Furthermore, since it consists of two integral corrugated plates, the medium on both sides naturally forms two different flow channels, resulting in good sealing performance and further reducing the welding workload of traditional surface regenerators. In addition, this invention solves the problem of different sizes and models of heat exchange elements due to varying heat exchange areas in traditional regenerators. The advantage of this invention is that the outer diameter of the corrugated plate unit can be adjusted according to the different heat exchange areas, i.e., the rolling length of the corrugated plate unit can be adjusted, which is very flexible. Moreover, the utilization rate of the corrugated plate material is close to 100%, with almost no waste.

[0026] The surface-type regenerator of this invention has a simple structure, is easy to manufacture, has low processing costs, can be automated, and significantly improves heat exchange efficiency, reduces pressure loss, and increases the compactness of the regenerator. More importantly, the absence of welds between the axial corrugated plates ensures the airtightness of the entire regenerator core. This also greatly shortens the manufacturing time of the regenerator heat exchange core, reduces costs, and allows this highly efficient and compact heat exchanger to serve more civilian applications. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the external structure of a surface regenerator according to a specific embodiment of the present invention;

[0029] Figure 2 This is a disassembled diagram of the coiled structure of a surface regenerator according to a specific embodiment of the present invention;

[0030] Figure 3 This is a partial fit diagram of the first corrugated plate and the second corrugated plate of a surface regenerator in a specific embodiment of the present invention.

[0031] The components are: 1. Sleeve; 2. Inner transition section; 3. Second medium flow channel; 4. First corrugated plate; 5. Second corrugated plate; 6. Edge strip; 7. Second medium flow area; 8. Shaped end cap; 9. Outer transition section; 10. Outer plate; 11. Reinforcing steel strip. Detailed Implementation

[0032] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0033] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this invention, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0035] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0036] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0037] In one embodiment, a surface regenerator is proposed, such as Figure 1 As shown, it includes a corrugated plate; the corrugated plate includes a first corrugated plate 4 and a second corrugated plate 5;

[0038] The first corrugated plate 4 and the second corrugated plate 5 are long strip corrugated plates. One end of the first corrugated plate 4 is fixedly connected to one end of the second corrugated plate 5, and the other end of the first corrugated plate 4 is fixedly connected to the other end of the second corrugated plate 5. The first corrugated plate 4 and the second corrugated plate 5 form a closed loop. The first corrugated plate 4 and the second corrugated plate 5 are arranged in parallel and rolled up to form a rolled structure.

[0039] The upper and lower surfaces of the first corrugated plate 4 and the second corrugated plate 5 are provided with corrugated flow channels connecting the two end faces of the coiled structure; a first medium flow channel is formed inside the closed ring, and a second medium flow channel 3 is formed outside the closed ring.

[0040] In this embodiment, corrugated plates are used in the regenerator, which can increase the heat exchange area and change the flow of the medium in the regenerator from laminar flow to turbulent flow, thus greatly improving the heat exchange efficiency of the heat exchanger.

[0041] In one embodiment, such as Figure 1 or Figure 3 As shown, the surface regenerator also includes:

[0042] Separator ( Figure 1 The middle part is covered by the edge of the irregular head 8. Figure 3 (Not shown), is set on both ends of the roll structure to divide the roll structure into a first medium flow area and a second medium flow area 7 that are separated from each other;

[0043] The edge strip 6 is disposed between the first corrugated plate 4 and the second corrugated plate 5, and is used to cooperate with the partition strip to seal the second medium flow channel 3 in the first medium flow area at the end face of the roll structure, and also to cooperate with the partition strip to seal the first medium flow channel in the second medium flow area 7 at the end face of the roll structure.

[0044] In this embodiment, as Figure 1 As shown, the end faces of the first medium flow area and the second medium flow area 7 are both fan-shaped. The edge strips 6 block the first medium flow channel in the first medium area and block the second medium flow channel 3 in the second medium area. In the specific structure, this is reflected in the staggered blocking, and the edge strips 6 of two adjacent first medium flow areas and second medium flow areas 7 are staggered. This structure can ensure that the two media will not mix when the first medium is introduced into all first medium flow areas and the second medium is introduced into all second medium flow areas 7. The first medium and the second medium are separated by only one corrugated plate. Due to the multi-point separation of the first medium and the second medium, the utilization rate of the corrugated plate is improved, making it almost wasteless, which greatly improves the heat exchange efficiency of the regenerator in this embodiment.

[0045] In this embodiment, as Figure 1 As shown, the surface regenerator also includes:

[0046] The irregularly shaped end cap 8 is fixed to one end face of the roll structure and serves as the sole inlet for all first medium flow areas.

[0047] In this embodiment, the end face shapes of each first medium flow area are exactly the same, as shown in the figure. The irregular end cap 8 includes a near-hole shape that is fastened to the first medium flow area, and a vent hole is opened at the bottom to conduct the first medium into each vent hole; the irregular end cap 8 is provided on the other end face of the roll structure corresponding to this face.

[0048] In this embodiment, the surface regenerator further includes:

[0049] Sleeve 1 is set in the core area of ​​the roll structure and is used to form the winding core of the first corrugated plate 4 and the second corrugated plate 5.

[0050] In this embodiment, in order to reduce assembly difficulty, the distribution direction of the corrugated flow channels is parallel to the central axis of the roll structure.

[0051] In one embodiment, such as Figure 2 or Figure 3 As shown, the corrugated flow channel is a continuous S-shaped flow channel.

[0052] In this embodiment, as Figure 2 or Figure 3 As shown, the cross-section of the corrugated flow channel is rectangular.

[0053] In this embodiment, as Figure 2 or Figure 3 As shown, the upper surface of the corrugated plate consists of corrugated channels and corrugated protrusions of the same shape arranged at intervals; the corrugated protrusions on the upper surface of the corrugated plate are the outer surface material of the corrugated channels on the lower surface of the corrugated plate.

[0054] In this embodiment, as Figure 2 or Figure 3 As shown, the lower surface of the corrugated plate consists of corrugated channels and corrugated protrusions of the same shape arranged at intervals; the corrugated protrusions on the lower surface of the corrugated plate are the outer surface material of the corrugated channels on the upper surface of the corrugated plate.

[0055] In this embodiment, the corrugated plate is made by stamping. In order to facilitate the sealing of the edge strip 6, the side part of the corrugated plate is stamped into a flat plate shape. The flat plate part and the upper surface of the corrugated protrusion on one side are on the same plane to ensure that the S-shaped flow channel on the other side is unobstructed.

[0056] In one embodiment, both the edge strip 6 and the spacer are welded to the roll structure by MIG welding.

[0057] In one embodiment, such as Figure 1 As shown, in order to ensure airtightness and stability, the two corrugated plates are at the beginning and end of the winding of the roll structure as the transition section; the outer surface of the cylindrical roll structure is fitted with an outer plate 10 and a reinforcing steel strip 11.

[0058] The inner transition section 2 can be formed by gradually transitioning multiple layers of thin steel plates, so that a gap of a set thickness is formed between the two corrugated plates; the outer transition section 9 is transitioned into a smooth ring using a similar method, and then wrapped with an outer plate 10, welded into a ring, and finally wrapped with a reinforcing steel strip 11 to prevent the rolled heat exchange core unit from deforming or loosening.

[0059] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A surface regenerator, characterized in that: It includes a corrugated plate, a spacer strip, and a side strip; the corrugated plate includes a first corrugated plate and a second corrugated plate; The first corrugated plate and the second corrugated plate are elongated corrugated plates. One end of the first corrugated plate is fixedly connected to one end of the second corrugated plate, and the other end of the first corrugated plate is fixedly connected to the other end of the second corrugated plate. The first corrugated plate and the second corrugated plate form a closed loop. The first corrugated plate and the second corrugated plate are arranged in parallel and rolled up to form a rolled structure. The upper and lower surfaces of the first and second corrugated plates are provided with corrugated flow channels that connect the two end faces of the roll structure; a first medium flow channel is formed inside the closed ring, and a second medium flow channel is formed outside the closed ring; The partition strip is disposed on the two end faces of the roll structure to divide the roll structure into a first medium flow area and a second medium flow area that are separated from each other. The edge strip is disposed between the first corrugated plate and the second corrugated plate, and is used to cooperate with the partition strip to close the second medium flow channel in the first medium flow area at the end face of the roll structure, and is also used to cooperate with the partition strip to close the first medium flow channel in the second medium flow area at the end face of the roll structure. The corrugated plate is made by stamping, and the corrugated flow channel is a continuous S-shaped flow channel. In order to facilitate the sealing of the edge strip, the side part of the corrugated plate is stamped into a flat plate shape.

2. The surface regenerator according to claim 1, characterized in that, The surface regenerator also includes: An irregularly shaped end cap, fixed to one end face of the roll structure, serves as the sole inlet for all the first medium flow areas.

3. The surface regenerator according to claim 1, characterized in that, The surface regenerator also includes: A sleeve, disposed in the axial core region of the coiled structure, is used to form the winding core of the first corrugated plate and the second corrugated plate.

4. The surface regenerator according to claim 1, characterized in that, The distribution direction of the corrugated flow channels is parallel to the central axis of the roll structure.

5. The surface regenerator according to claim 1, characterized in that, The corrugated flow channel has a rectangular cross-section.

6. The surface regenerator according to claim 5, characterized in that, The upper surface of the corrugated plate is composed of corrugated channels and corrugated protrusions of the same shape arranged at intervals; the corrugated protrusions on the upper surface of the corrugated plate are the outer surface material of the corrugated channels on the lower surface of the corrugated plate; the lower surface of the corrugated plate is composed of corrugated channels and corrugated protrusions of the same shape arranged at intervals; the corrugated protrusions on the lower surface of the corrugated plate are the outer surface material of the corrugated channels on the upper surface of the corrugated plate.

7. The surface regenerator according to claim 1, characterized in that, The edge strip is welded onto the roll structure.

8. The surface regenerator according to claim 1, characterized in that, The corrugated plate is located at the beginning and end of the winding of the roll structure as a transition section; the cylindrical outer surface of the roll structure is fitted with an outer plate and a reinforcing steel strip.

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