Water cooling wall structure

Abstract

The utility model discloses a water cooling wall structure, which comprises water cooling wall tubes and fins, the fins are fixed between two adjacent water cooling wall tubes, and the fins are provided with stress release structures. According to the utility model, the running deformation stress of the tube panel is released, and damage is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of water-cooled wall technology, and specifically relates to a water-cooled wall structure. Background Technology

[0002] Since the "dual carbon" target was proposed, the installed capacity and power generation of new energy sources have grown rapidly. Due to the fluctuating, random, and intermittent power generation characteristics of new energy sources, they pose an impact on the reliability and stability of the power system. The supporting and regulating role of coal power will remain crucial for a long period of time.

[0003] Currently in China, large-capacity, high-parameter ultra-supercritical pulverized coal boilers are generally operating under deep peak-shaving conditions. As the boiler load decreases and changes frequently, the deviations on both the flue gas side and the working fluid side of the furnace water-cooled wall increase, and the temperature deviation of the water-cooled wall also increases. Excessive deviation will inevitably cause deformation of the water-cooled wall tubes, leading to the risk of water-cooled wall cracking, and even causing tube rupture and leakage, seriously affecting the safe operation of the boiler unit. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a water-cooled wall structure that releases stress caused by deformation during tube panel operation, thereby preventing damage.

[0005] The embodiments of this utility model are achieved through the following technical solutions:

[0006] A water-cooled wall structure includes water-cooled wall tubes and fins, wherein the fins are fixed between two adjacent water-cooled wall tubes and the fins are provided with stress relief structures.

[0007] In one embodiment of this utility model, the stress relief structure is a stress relief seam.

[0008] In one embodiment of this utility model, the stress relief joint is provided with a crack-stopping hole at its end.

[0009] In one embodiment of this utility model, the water-cooled wall tube is fixed with a flexible sealing device, and the stress relief structure is located inside the flexible sealing device.

[0010] In one embodiment of the present invention, the flexible sealing device includes a sealing plug, a sealing folding plate, and an expansion joint. The expansion joint is fixed with sealing folding plates on both sides. The sealing folding plates are welded to the sealing plug. The sealing plug is fixed between two adjacent water-cooled wall tubes.

[0011] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0012] This invention incorporates stress relief seams on the fins in areas of the water-cooled wall prone to tearing. During operation, these seams effectively release the deformation stress of the tube wall, reducing the risk of tearing and tube bursting. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the water-cooled wall structure in this utility model;

[0015] Figure 2 This is a schematic diagram of the stress relief seam on the fin in this utility model.

[0016] Icons: 1-Stress relief joint, 2-Water-cooled wall tube, 3-Fin, 4-Sealing plug, 5-Sealing fold, 6-Expansion joint, 7-Crack arresting hole. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this utility model, it should be noted that if terms such as "inner" or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "configure," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example

[0023] Please refer to Figure 1 and Figure 2 This embodiment provides a water-cooled wall structure, which includes a water-cooled wall tube 2 and fins 3. The fins 3 are made of flat steel and are welded between two adjacent water-cooled wall tubes 2. The fins 3 are provided with a stress relief structure, which can be a stress relief seam 1 or a U-shaped plate. During the operation of the water-cooled wall, the stress relief seam 1 or the U-shaped plate provides space for the expansion and deformation of the water-cooled wall, which can reduce the risk of tube rupture. In this embodiment, the stress relief structure can be a stress relief seam 1, which can effectively release the deformation stress of the tube screen during the operation of the water-cooled wall, thereby reducing the risk of tube rupture.

[0024] In this embodiment, the end of the stress relief joint 1 is also provided with a crack prevention hole 7 to prevent the end of the stress relief joint 1 from being easily deformed and damaged due to stress concentration.

[0025] In this embodiment, the water-cooled wall tube 2 is fixed with a flexible sealing device, which includes a sealing plug 4, a sealing baffle 5, and an expansion joint 6. The expansion joint 6 is a commercially available corrugated plate. The sealing baffle 5 is welded to both sides of the expansion joint 6. The sealing baffle 5 is welded to the sealing plug 4. The sealing plug 4 is welded between two adjacent water-cooled wall tubes 2. Moreover, the stress relief joint 1 is located inside the flexible sealing device. When the water-cooled wall is running, water flows in the water-cooled wall tube 2, and high-temperature flue gas flows in the flexible sealing device. The flexible sealing device prevents high-temperature flue gas from leaking.

[0026] It should be noted that the left and right sides of the flexible sealing device are sealed by welding the sealing baffles 5 to the expansion joint 6, and the upper and lower ends of the flexible sealing device are sealed by welding the end plates to the expansion joint 6. The end plates can be steel plates or corrugated joints. Although the welding of the end plates to the expansion joint 6 will affect the expansion deformation of the expansion joint 6, the overall structure of the water-cooled wall is large, and the size of the flexible sealing device and the expansion joint 6 is also large. Therefore, from the perspective of the overall deformation of the expansion joint 6, the restriction at the edge of the expansion joint 6 is almost negligible and does not affect the overall deformation.

[0027] This invention provides stress relief seams 1 on the fins 3 in areas of the water-cooled wall prone to cracking. During operation, this effectively releases the deformation stress of the tube screen and reduces the risk of cracking and tube bursting.

[0028] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A water-cooled wall structure, characterized by, The water-cooled wall pipe and the fin are fixed between two adjacent water-cooled wall pipes, and the fin is provided with a stress release structure, the water-cooled wall pipe is fixed with a flexible sealing device, and the stress release structure is located in the flexible sealing device, the flexible sealing device comprises a sealing plug, a sealing flap and an expansion joint, the sealing flap is fixed on both sides of the expansion joint, and the sealing flap is welded with the sealing plug, and the sealing plug is fixed between two adjacent water-cooled wall pipes.

2. A water cooled wall structure according to claim 1, wherein The stress release structure is a stress release seam.

3. A water cooled wall structure according to claim 2, wherein The stress release seam is provided with a crack arrest hole at the end.

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