Tube bundle anti-freezing arrangement of natural ventilation cooling system

Abstract

The utility model discloses a tube bundle anti-freezing arrangement of a natural ventilation cooling system, which comprises two heat exchange components, a shutter component and a steel support component, one sides of the two heat exchange components are connected with each other, and the other sides of the two heat exchange components are connected with two sides of the shutter component. The two heat exchange assemblies and the shutter assembly are arranged in the shape of an acute triangle along the section in the horizontal direction, the steel supporting assembly is installed on the surface, close to the two heat exchange assemblies, of the shutter assembly, and the two sides of the steel supporting assembly are connected with the two sides of the shutter assembly. According to the pipe bundle anti-freezing arrangement of the natural ventilation cooling system, the louver body is arranged, the flow of air flowing into a structure defined by the two heat exchange assemblies and the louver assembly from the outside can be controlled, and therefore the temperature of the air in a framework is increased, and the heat exchange efficiency is improved. Therefore, air convection heat exchange is reduced, and tube bundle freezing is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial cooling devices, in particular to a tube bundle antifreeze arrangement of a natural ventilation cooling system. Background Art

[0002] Air cooling systems currently used in coal-fired power plants, petrochemicals, and chemical industries can be primarily categorized by ventilation method: direct mechanical ventilation systems and indirect natural ventilation systems. Natural ventilation systems are a novel type of air cooling system that combines the advantages of both direct and indirect systems. However, the common tube bundle layout of existing air cooling systems can lead to freezing, deformation, and cracking of the air cooling tube bundles during low-load winter operation, when the total steam turbine exhaust volume is reduced. Utility Model Content

[0003] In view of this, in order to solve the above problems, the purpose of the present invention is to provide a tube bundle antifreeze arrangement for a natural ventilation cooling system, comprising:

[0004] Two heat exchange assemblies, a shutter assembly, and a steel support assembly, one side of the two heat exchange assemblies being connected to each other, the other sides of the two heat exchange assemblies being connected to two sides of the shutter assembly, the two heat exchange assemblies and the shutter assembly being arranged in an acute-angled triangle along a horizontal cross-section, the steel support assembly being mounted on a surface of the shutter assembly close to the two heat exchange assemblies, and the two sides of the steel support assembly being connected to two sides of the shutter assembly;

[0005] Among them, each of the heat exchange components includes at least two heat exchange units, and the two heat exchange units are arranged up and down. Each of the heat exchange units includes: at least one countercurrent heat exchange tube bundle, an exhaust pipe, a downstream heat exchange tube bundle and two header units. The countercurrent heat exchange tube bundle is arranged between the downstream heat exchange tube bundles, and both ends of the two downstream heat exchange tube bundles are connected to the two header units. The upper end of the countercurrent heat exchange tube bundle is connected to the exhaust pipe, and the lower end of the countercurrent heat exchange tube bundle is connected to the header unit.

[0006] In another preferred embodiment, the countercurrent heat exchange tube bundle includes: a plurality of countercurrent heat exchange pipes, the plurality of countercurrent heat exchange pipes are arranged parallel to each other, the upper ends of the plurality of countercurrent heat exchange pipes are connected to the exhaust pipe, and the lower ends of the plurality of countercurrent heat exchange pipes are connected to the manifold unit.

[0007] In another preferred embodiment, each of the downstream heat exchange tube bundles comprises: a plurality of downstream heat exchange pipes, the plurality of downstream heat exchange pipes are arranged parallel to each other, and both ends of the plurality of downstream heat exchange pipes are connected to the two header units.

[0008] In another preferred embodiment, each of the manifold units includes: a manifold body and a tube sheet, the manifold body is installed on the upper surface of the tube sheet, the tube sheet is provided with a plurality of through holes, each of the countercurrent heat exchange pipes and the downstream heat exchange pipe passes through a corresponding through hole and is connected to the manifold body.

[0009] In another preferred embodiment, each of the counter-flow heat exchange pipes and the co-flow heat exchange pipe has an elliptical cross-section along the horizontal direction.

[0010] In another preferred embodiment, the outer wall of each of the counter-flow heat exchange pipes and one of the downstream heat exchange pipes is provided with heat dissipation fins.

[0011] In another preferred embodiment, it further comprises: a plurality of fixing seats, wherein two ends of the plurality of fixing seats are connected to two upper and lower adjacent header bodies.

[0012] In another preferred embodiment, the shutter assembly includes: a mounting frame and a shutter body, the shutter body is mounted on the inner side of the mounting frame, and both sides of the mounting frame are connected to the two heat exchange assemblies via a plurality of connecting rods.

[0013] In another preferred embodiment, the steel support assembly includes: a plurality of first rods and a plurality of second rods, wherein the plurality of first rods together form a U-shaped frame, and the open end of the U-shaped frame is installed on a surface of the mounting frame; the plurality of second rods together form a W-shaped frame, and the open end of the W-shaped frame is installed on a surface of the mounting frame, and the W-shaped frame is connected to the U-shaped frame.

[0014] In another preferred embodiment, it further comprises: a support leg, the upper end of the support leg is mounted on the lower surface of the header body below.

[0015] Due to the adoption of the above technical solution, the present invention has the following positive effects compared with the prior art: through the application of the present invention, an anti-freezing arrangement for the tube bundle of a natural ventilation cooling system is provided. By setting the shutter body, the air flow from the outside into the structure enclosed by the two heat exchange components and the shutter component can be controlled to reduce air convection heat exchange and thus prevent the tube bundle from freezing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A top view of a tube bundle antifreeze arrangement for a natural ventilation cooling system according to the present invention;

[0017] Figure 2 This is a front view of a heat exchange component of a tube bundle antifreeze arrangement for a natural ventilation cooling system according to the present invention;

[0018] Figure 3 A side view of a heat exchange component of a tube bundle antifreeze arrangement for a natural ventilation cooling system according to the present invention;

[0019] Figure 4 This is a front view of a downstream heat exchange tube bundle of a natural ventilation cooling system according to the present invention, with an antifreeze arrangement for the tube bundle;

[0020] Figure 5 A side view of a downstream heat exchange tube bundle of a natural ventilation cooling system according to the present invention with an antifreeze arrangement for the tube bundle;

[0021] Figure 6 This is a top view of a downstream heat exchange tube bundle of a natural ventilation cooling system according to the utility model with an anti-freezing arrangement of the tube bundle.

[0022] In the attached figure: 1. heat exchange unit; 2. countercurrent heat exchange tube bundle; 3. exhaust pipe; 4. cocurrent heat exchange tube bundle; 5. header body; 6. tube sheet; 7. fixing seat; 8. support leg; 9. louver assembly; 10. first rod body; 11. second rod body; 12. steel support assembly; 13. heat exchange assembly; 14. heat sink fin. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0024] like Figures 1 to 6 FIG. 1 shows a tube bundle antifreeze arrangement of a natural ventilation cooling system according to a preferred embodiment 1, comprising:

[0025] Two heat exchange components 13, a shutter component 9, and a steel support component 12. One side of the two heat exchange components 13 is connected to each other, and the other side of the two heat exchange components 13 is connected to both sides of the shutter component 9. The two heat exchange components 13 and the shutter component 9 are arranged in an acute triangle along the horizontal cross-section. The steel support component 12 is installed on a surface of the shutter component 9 close to the two heat exchange components 13. The two sides of the steel support component 12 are connected to both sides of the shutter component 9.

[0026] Among them, each heat exchange assembly 13 includes at least two heat exchange units 1, and the two heat exchange units 1 are arranged up and down. Each heat exchange unit 1 includes: at least one countercurrent heat exchange tube bundle 2, an exhaust pipe 3, a downstream heat exchange tube bundle 4 and two header units. The countercurrent heat exchange tube bundle 2 is arranged between the two downstream heat exchange tube bundles 4. Both ends of the two downstream heat exchange tube bundles 4 are connected to the two header units. The upper end of the countercurrent heat exchange tube bundle 2 is connected to the exhaust pipe 3, and the lower end of the countercurrent heat exchange tube bundle 2 is connected to the header unit.

[0027] During actual use, during low-load operation in winter, the shutter opening is adjusted to reduce the amount of outside air entering the structure enclosed by the two heat exchange components 13 and the shutter component 9, or to isolate the outside air for anti-freezing protection. In addition, by installing an exhaust pipe 3 at the upper end of the countercurrent heat exchange tube bundle 2, air and non-condensable gas are discharged from the countercurrent heat exchange tube bundle 2 to prevent condensed water from freezing and causing the downstream heat exchange tube bundle 4 or the countercurrent heat exchange tube bundle 2 to freeze and crack.

[0028] Furthermore, as a preferred embodiment, the countercurrent heat exchange tube bundle 2 includes: a plurality of countercurrent heat exchange pipes, the plurality of countercurrent heat exchange pipes are arranged parallel to each other, the upper ends of the plurality of countercurrent heat exchange pipes are connected to the exhaust pipe 3, and the lower ends of the plurality of countercurrent heat exchange pipes are connected to the manifold unit.

[0029] Furthermore, as a preferred embodiment, each downstream heat exchange tube bundle 4 includes: a plurality of downstream heat exchange pipes, the plurality of downstream heat exchange pipes are arranged in parallel with each other, and both ends of the plurality of downstream heat exchange pipes are connected to two header units.

[0030] Furthermore, as a preferred embodiment, each header unit includes: a header body 5 and a tube sheet 6, the header body 5 is installed on the upper surface of the tube sheet 6, the tube sheet 6 is provided with a plurality of through holes, and each countercurrent heat exchange pipe and a downstream heat exchange pipe passes through a corresponding through hole and is connected to the header body 5.

[0031] Furthermore, as a preferred embodiment, each counterflow heat exchange pipe and each downstream heat exchange pipe has an elliptical cross-section along the horizontal direction. Furthermore, the elliptical cross-sections of the counterflow heat exchange pipe and the downstream heat exchange pipe release freezing stress through micro-deformation, thereby preventing the counterflow heat exchange pipe or the downstream heat exchange pipe from freezing and cracking, thereby improving safety performance.

[0032] Furthermore, as a preferred embodiment, the outer wall of each counter-flow heat exchange pipe and a downstream heat exchange pipe is provided with heat dissipation fins 14. Furthermore, the heat dissipation fins 14 are used to improve the heat exchange effect.

[0033] Furthermore, as a preferred embodiment, it further comprises: a plurality of fixing seats 7 , both ends of which are connected to two upper and lower adjacent header bodies 5 .

[0034] Furthermore, as a preferred embodiment, the shutter assembly 9 includes a mounting frame and a shutter body. The shutter body is mounted on the inner side of the mounting frame, and the two sides of the mounting frame are connected to the two heat exchange assemblies 13 via a plurality of connecting rods. Furthermore, in actual use, the shutter body is preferably an electric shutter to facilitate adjustment of the shutter body. Electric shutters are conventional in the art and will not be described in detail here.

[0035] Further, as a preferred embodiment, the steel support assembly 12 includes: a plurality of first rods 10 and a plurality of second rods 11, wherein the plurality of first rods 10 together form a U-shaped frame, the open end of the U-shaped frame is mounted on a surface of the mounting frame, and the plurality of second rods 11 together form a W-shaped frame, the open end of the W-shaped frame is mounted on a surface of the mounting frame, and the W-shaped frame is connected to the U-shaped frame.

[0036] Furthermore, as a preferred embodiment, it further comprises: a support leg 8 , the upper end of the support leg 8 is mounted on the lower surface of the header body 5 below.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A tube bundle antifreeze arrangement for a natural ventilation cooling system, characterized in that: include: Two heat exchange assemblies, a shutter assembly, and a steel support assembly, one side of the two heat exchange assemblies being connected to each other, the other sides of the two heat exchange assemblies being connected to two sides of the shutter assembly, the two heat exchange assemblies and the shutter assembly being arranged in an acute-angled triangle along a horizontal cross-section, the steel support assembly being mounted on a surface of the shutter assembly close to the two heat exchange assemblies, and the two sides of the steel support assembly being connected to two sides of the shutter assembly; Among them, each of the heat exchange components includes at least two heat exchange units, and the two heat exchange units are arranged up and down. Each of the heat exchange units includes: at least one countercurrent heat exchange tube bundle, an exhaust pipe, a downstream heat exchange tube bundle and two header units. The countercurrent heat exchange tube bundle is arranged between the two downstream heat exchange tube bundles, and both ends of the two downstream heat exchange tube bundles are connected to the two header units. The upper end of the countercurrent heat exchange tube bundle is connected to the exhaust pipe, and the lower end of the countercurrent heat exchange tube bundle is connected to the header unit.

2. The tube bundle antifreeze arrangement of the natural ventilation cooling system according to claim 1, characterized in that: The countercurrent heat exchange tube bundle includes: a plurality of countercurrent heat exchange pipes, the plurality of countercurrent heat exchange pipes are arranged parallel to each other, the upper ends of the plurality of countercurrent heat exchange pipes are connected to the exhaust pipe, and the lower ends of the plurality of countercurrent heat exchange pipes are connected to the header unit.

3. The tube bundle antifreeze arrangement of the natural ventilation cooling system according to claim 2, characterized in that: Each of the downstream heat exchange tube bundles comprises: a plurality of downstream heat exchange pipes, the plurality of downstream heat exchange pipes are arranged in parallel with each other, and both ends of the plurality of downstream heat exchange pipes are connected to the two header units.

4. The tube bundle antifreeze arrangement of the natural ventilation cooling system according to claim 3, characterized in that: Each of the manifold units includes: a manifold body and a tube sheet, the manifold body is installed on the upper surface of the tube sheet, the tube sheet is provided with a plurality of through holes, each of the countercurrent heat exchange pipes and the downstream heat exchange pipe passes through a corresponding through hole and is connected to the manifold body.

5. The tube bundle antifreeze arrangement of the natural ventilation cooling system according to claim 3, characterized in that: The cross-section of each of the countercurrent heat exchange pipes and the downstream heat exchange pipe along the horizontal direction is elliptical.

6. The tube bundle antifreeze arrangement of the natural ventilation cooling system according to claim 3, characterized in that: The outer wall of each of the counter-current heat exchange pipes and one of the downstream heat exchange pipes is provided with heat dissipation fins.

7. The tube bundle antifreeze arrangement of the natural ventilation cooling system according to claim 4, characterized in that: Also includes: A plurality of fixing seats are provided, and two ends of the fixing seats are connected to two upper and lower adjacent header bodies.

8. The tube bundle antifreeze arrangement of the natural ventilation cooling system according to claim 1, characterized in that: The shutter assembly comprises: a mounting frame and a shutter body. The shutter body is mounted on the inner side of the mounting frame. Both sides of the mounting frame are connected to the two heat exchange assemblies via a plurality of connecting rods.

9. The tube bundle antifreeze arrangement of the natural ventilation cooling system according to claim 8, characterized in that: The steel support assembly includes: a plurality of first rods and a plurality of second rods, wherein the plurality of first rods together form a U-shaped frame, the open end of the U-shaped frame is mounted on a surface of the mounting frame, and the plurality of second rods together form a W-shaped frame, the open end of the W-shaped frame is mounted on a surface of the mounting frame, and the W-shaped frame is connected to the U-shaped frame.

10. The tube bundle antifreeze arrangement of the natural ventilation cooling system according to claim 4, characterized in that: Also includes: The upper end of the support leg is installed on the lower surface of the header body below.

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