A boiler flue gas heat exchange structure and an organic heat carrier boiler

Abstract

The utility model relates to the technical field of boilers, and specifically to a boiler flue gas heat exchange structure and an organic heat carrier boiler, comprising a heat exchange tube, a first heat exchange terminal and a second heat exchange terminal, wherein the heat exchange tube is horizontally arranged, and one end of the heat exchange tube is connected to the first heat exchange terminal, and the other end of the heat exchange tube is connected to the second heat exchange terminal, adjacent first heat exchange terminals located in the same vertical plane are connected through a connecting tube, and adjacent second heat exchange terminals located in the same vertical plane are connected through a connecting tube, wherein a heat exchange tube support structure is arranged below the heat exchange tube, and the heat exchange tube support structure passes through adjacent heat exchange tubes and is connected to an inner wall of an organic heat carrier boiler, and the heat exchange tube support structure is arranged to support the heat exchange tube, so that the overall weight is distributed by the inner wall of the organic heat carrier boiler, thereby reducing the burden of the flue gas heat exchange structure itself, thereby being able to arrange more heat exchange tubes, and to reduce the frequency of manual inspections to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a boiler flue gas heat exchange structure and an organic heat carrier boiler. Background Art

[0002] The main principle of the organic heat carrier boiler is to use organic heat carrier to exchange heat in the combustion chamber of the boiler, and then transport the heat out of the boiler to achieve heat transfer and exchange.

[0003] A Chinese patent with announcement number CN220648647U discloses an organic heat carrier boiler, which improves the overall flue gas heat utilization rate by adding a waste heat heat exchange device in the flue. However, in actual use, a flue gas heat exchange structure is provided in the upper furnace body, which heats the working medium in the heat exchange tube by the high-temperature flue gas obtained by combustion, and converts the thermal energy into mechanical energy. In order to further improve the heat utilization rate, multiple layers of heat exchange tubes are often added, which increases the overall weight of the boiler flue gas heat exchange structure. The heat exchange tubes are prone to bending during use, making the entire equipment unstable and requiring a large amount of manpower for regular inspections. Utility Model Content

[0004] In view of the above problems, the utility model provides a boiler flue gas heat exchange structure and an organic heat carrier boiler.

[0005] The technical solution adopted is a boiler flue gas heat exchange structure, comprising a heat exchange tube, a first heat exchange terminal and a second heat exchange terminal, wherein the heat exchange tube is horizontally arranged, and one end of the heat exchange tube is connected to the first heat exchange terminal, and the other end of the heat exchange tube is connected to the second heat exchange terminal, adjacent first heat exchange terminals located in the same vertical plane are connected through a connecting pipe, and adjacent second heat exchange terminals located in the same vertical plane are connected through a connecting pipe, wherein a heat exchange tube support structure is arranged under the heat exchange tube, and the heat exchange tube support structure passes through adjacent heat exchange tubes and is connected to the inner wall of the organic heat carrier boiler.

[0006] Optionally, along the flow direction of the heat exchange fluid in the heat exchange tube, the cross-section of the heat exchange tube is a triangular structure.

[0007] Optionally, the heat exchange tube is an inverted triangle structure, and the two inclined surfaces of the heat exchange tube are the windward surfaces of the flue gas.

[0008] Optionally, two ends of the heat exchange tube are connected to two transfer tubes through two flange sections, and the two transfer tubes are respectively connected to the first heat exchange terminal and the second heat exchange terminal.

[0009] Optionally, the heat exchange tube support structure includes a support sheet and a support rod, and a groove matching the heat exchange tube is provided on the upper portion of the support sheet;

[0010] The support sheet is provided with a through hole, and the support rod passes through the through hole, and both ends of the support rod are respectively connected to the inner wall of the organic heat carrier boiler.

[0011] Optionally, the groove is filled with a heat-resistant gasket.

[0012] The utility model also provides an organic heat carrier boiler adapted thereto, comprising an organic heat carrier boiler body, the organic heat carrier boiler body comprising an upper furnace body and a lower furnace body, the upper furnace body being connected to a chimney, the chimney being connected to a waste heat utilization device, wherein a flue gas heat exchange cavity is arranged in the upper furnace body, and the boiler flue gas heat exchange structure is arranged in the flue gas heat exchange cavity.

[0013] The beneficial effects of the present utility model include at least one of the following:

[0014] 1. By setting up a heat exchange tube support structure to support the heat exchange tube, the overall weight is distributed by the inner wall of the organic heat carrier boiler, reducing the burden of the flue gas heat exchange structure itself, so that more heat exchange tubes can be set, which can reduce the frequency of manual inspections to a certain extent.

[0015] 2. It solves the problem that the existing boiler flue gas heat exchange structure often adds multiple layers of heat exchange tubes, which increases the overall weight of the boiler flue gas heat exchange structure. The heat exchange tubes are prone to bending during use, making the entire equipment unstable and requiring a large amount of manpower for regular inspections. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an organic heat carrier boiler;

[0017] Figure 2 This is a schematic diagram of the top view of the structure of an organic heat carrier boiler;

[0018] Figure 3 It is a structural schematic diagram of the boiler flue gas heat exchange structure;

[0019] Figure 4 It is a structural schematic diagram of the boiler flue gas heat exchange structure from another perspective;

[0020] Figure 5 is a structural schematic diagram of a heat exchange tube support structure;

[0021] The figure numbers are as follows: 1 is the organic heat carrier boiler body, 2 is the base, 3 is the upper furnace body, 4 is the lower furnace body, 6 is the chimney, 7 is the waste heat utilization device, 8 is the boiler flue gas heat exchange structure, 9 is the flue gas heat exchange cavity, 10 is the first heat exchange terminal, 11 is the second heat exchange terminal, 12 is the heat exchange tube, 13 is the transfer tube, 14 is the flange, 15 is the support plate, 17 is the support rod, 18 is the heat-resistant gasket, and 19 is the through hole. DETAILED DESCRIPTION

[0022] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0024] like Figures 1 to 5 As shown, a boiler flue gas heat exchange structure includes a heat exchange tube 12, a first heat exchange terminal 10 and a second heat exchange terminal 11, wherein the heat exchange tube 12 is horizontally arranged, and one end of the heat exchange tube 12 is connected to the first heat exchange terminal 10, and the other end of the heat exchange tube 12 is connected to the second heat exchange terminal 11, adjacent first heat exchange terminals 10 located in the same vertical plane are connected through a connecting pipe, and adjacent second heat exchange terminals 11 located in the same vertical plane are connected through a connecting pipe, wherein a heat exchange tube support structure is arranged below the heat exchange tube 12, and the heat exchange tube support structure passes through adjacent heat exchange tubes 12 and is connected to the inner wall of the organic heat carrier boiler.

[0025] The purpose of this design is to support the heat exchange tubes by setting up a heat exchange tube support structure, so that the overall weight is distributed by the inner wall of the organic heat carrier boiler, reducing the burden of the flue gas heat exchange structure itself, so that more heat exchange tubes can be set up, which can reduce the frequency of manual inspections to a certain extent. It solves the problem that the existing boiler flue gas heat exchange structure often adds multiple layers of heat exchange tubes, which increases the overall weight of the boiler flue gas heat exchange structure, and the heat exchange tubes are prone to bending during use, making the entire equipment unstable and requiring a large amount of manpower for regular inspections.

[0026] In this embodiment, a specific structure of a heat exchange tube is provided, wherein along the flow direction of the heat exchange liquid in the heat exchange tube 12, the cross-section of the heat exchange tube 12 is a triangular structure, the heat exchange tube 12 is an inverted triangular structure, and the two inclined surfaces of the heat exchange tube 12 are the windward surfaces of the flue gas.

[0027] The purpose of this design is to set up an inverted triangle structure of heat exchange tubes. Under the condition of the same surface area, this structure has more contact area with high-temperature flue gas than a circular structure, thereby improving the heat utilization efficiency to a certain extent.

[0028] In this embodiment, two ends of the heat exchange tube 12 are connected to two transfer tubes 13 through two flanges 14 , and the two transfer tubes 13 are connected to the first heat exchange terminal 10 and the second heat exchange terminal 11 , respectively.

[0029] The purpose of this design is that since the heat exchange pipe adopts an inverted triangle structure, when it is connected with a conventional heat exchange terminal, the connection mechanism is prone to mismatch. Therefore, it is connected to the heat exchange terminal in the form of a flange and a transfer tube. On the one hand, it solves the mismatch problem, and on the other hand, it provides an easy-to-disassemble structure.

[0030] In this embodiment, a specific composition of a heat exchange tube support structure is provided, wherein the heat exchange tube support structure includes a support sheet 15 and a support rod 17, and a groove matching the heat exchange tube 12 is provided on the upper portion of the support sheet 15;

[0031] The support sheet 15 is provided with a through hole 19 , and the support rod 17 passes through the through hole 19 , both ends of the support rod 17 are respectively connected to the inner wall of the organic heat carrier boiler, and the groove is filled with a heat-resistant gasket 18 .

[0032] The purpose of such a design is to support the heat exchange tube by means of the support plate, and at the same time, the supported weight is transferred to the inner wall of the organic heat carrier boiler via the support rod, thereby greatly reducing the supported weight of the heat exchange terminal part. In specific implementation, those skilled in the art can set them at a certain distance according to actual conditions, and by adding a heat-resistant gasket, the contact area between the support plate and the heat exchange tube can be increased, thereby reducing the probability of damage to the heat exchange tube.

[0033] In this embodiment, an organic heat carrier boiler using this boiler flue gas heat exchange structure is also provided, which includes an organic heat carrier boiler body 1, the organic heat carrier boiler body 1 includes an upper furnace body 3 and a lower furnace body 4, the upper furnace body 3 is connected to the chimney 6, and the chimney 6 is connected to the waste heat utilization device 7, wherein a flue gas heat exchange cavity 9 is arranged in the upper furnace body 3, and a boiler flue gas heat exchange structure is arranged in the flue gas heat exchange cavity 9.

[0034] It should be pointed out that when the applicant implemented the technical solution with announcement number CN220648647U, it was found that although this organic heat carrier boiler improved the overall flue gas heat utilization rate, the daily maintenance cost was relatively high. This was mainly because as the number of heat exchange tubes increased, the weight of the heat exchange terminal and the rectified heat exchange structure increased significantly. Even if an additional connecting structure was added, most of the weight was still applied to the heat exchange terminal. The heat exchange terminal not only served as a heat exchange liquid transport and circulation function, but also needed to provide necessary support for the entire flue gas heat exchange structure. The material selection was difficult. The technical solution provided in this embodiment was adopted to transfer part of the weight of the heat exchange tube to the inner wall of the organic heat carrier boiler. In the process of standardized production, it would not bring much increase in the process, but the operating stability of the entire equipment could be greatly improved.

[0035] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A boiler flue gas heat exchange structure, comprising a heat exchange tube (12), a first heat exchange terminal (10) and a second heat exchange terminal (11), wherein the heat exchange tube (12) is arranged horizontally, and one end of the heat exchange tube (12) is connected to the first heat exchange terminal (10), and the other end of the heat exchange tube (12) is connected to the second heat exchange terminal (11), adjacent first heat exchange terminals (10) located in the same vertical plane are connected through a connecting pipe, and adjacent second heat exchange terminals (11) located in the same vertical plane are connected through a connecting pipe, characterized in that: A heat exchange tube support structure is provided below the heat exchange tube (12), and the heat exchange tube support structure passes between adjacent heat exchange tubes (12) and is connected to the inner wall of the organic heat carrier boiler.

2. A boiler flue gas heat exchange structure according to claim 1, characterized in that: Along the flow direction of the heat exchange fluid in the heat exchange tube (12), the cross section of the heat exchange tube (12) is a triangular structure.

3. A boiler flue gas heat exchange structure according to claim 2, characterized in that: The heat exchange tube (12) is an inverted triangle structure, and the two inclined surfaces of the heat exchange tube (12) are smoke windward surfaces.

4. A boiler flue gas heat exchange structure according to claim 2, characterized in that: Both ends of the heat exchange tube (12) are connected to two transfer tubes (13) via two flanges (14), and the two transfer tubes (13) are respectively connected to the first heat exchange terminal (10) and the second heat exchange terminal (11).

5. The boiler flue gas heat exchange structure according to claim 3, characterized in that: The heat exchange tube support structure comprises a support plate (15) and a support rod (17); a groove matching the heat exchange tube (12) is provided on the upper part of the support plate (15); The support sheet (15) is provided with a through hole (19), and the support rod (17) passes through the through hole (19), and both ends of the support rod (17) are respectively connected to the inner wall of the organic heat carrier boiler.

6. A boiler flue gas heat exchange structure according to claim 5, characterized in that: The groove is filled with a heat-resistant gasket (18).

7. An organic heat carrier boiler, comprising an organic heat carrier boiler body (1), the organic heat carrier boiler body (1) comprising an upper furnace body (3) and a lower furnace body (4), the upper furnace body (3) being connected to a chimney (6), the chimney (6) being connected to a waste heat utilization device (7), characterized in that: A flue gas heat exchange chamber (9) is provided in the upper furnace body (3), and a boiler flue gas heat exchange structure according to any one of claims 1 to 6 is provided in the flue gas heat exchange chamber (9).

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