Air preheater with tube bundle convenient to disassemble

Abstract

The utility model belongs to the technical field of air preheaters, and particularly discloses an air preheater with a tube bundle convenient to disassemble, which comprises two supporting plates, a plurality of smoke tubes, a plurality of first clamping plates and a plurality of second clamping plates, four supporting frames are arranged between the two supporting plates, each supporting plate is provided with a plurality of through holes, and the through holes are communicated with the smoke tubes. The two ends of each flue gas pipe rotationally penetrate through the through holes in the supporting plates, each first clamping plate and each second clamping plate are provided with limiting grooves used for being connected with a row of flue gas pipes in a clamped mode, and each first clamping plate and each second clamping plate are detachably connected. The air preheater aims at solving the problems that an existing air preheater cannot be disassembled, and when a tube bundle is corroded and damaged, damaged parts cannot be replaced conveniently and rapidly. By arranging the first clamping plate and the second clamping plate which are detachably connected and the smoke pipe rotationally penetrating through the supporting plate, the pipe bundle can be conveniently and rapidly detached, and the corroded and damaged smoke pipe can be conveniently replaced.

Description

Technical Field

[0001] This utility model relates to the field of air preheater technology, and specifically to an air preheater with easily detachable tube bundles. Background Technology

[0002] In modern industrial boiler systems, tubular air preheaters play a crucial role. Their working principle involves utilizing waste heat from flue gas to preheat the air entering the boiler for combustion. During this heat transfer process, the air effectively absorbs heat from the flue gas. On one hand, by lowering the boiler's exhaust temperature, this significantly reduces heat loss carried away by the exhaust, improving energy efficiency and effectively increasing the overall thermal efficiency of the boiler system while reducing energy consumption costs. On the other hand, the preheated air entering the boiler creates more favorable conditions for fuel combustion, thereby improving combustion efficiency, ensuring more complete combustion, and enhancing the stability of the combustion process.

[0003] However, when it is necessary to overhaul the existing air preheater, the tube bundle is fixed in the overall structure and cannot be disassembled. When the tube bundle has problems such as corrosion or damage, it is not easy to replace the damaged parts. This will not only reduce the performance of the air preheater, but also cause the entire boiler system to operate unstably. Utility Model Content

[0004] The purpose of this invention is to provide an air preheater with easily disassembled tube bundles, in order to solve the problem that existing air preheaters cannot be disassembled and that damaged parts cannot be easily replaced when the tube bundles are corroded or broken.

[0005] To achieve the above objectives, the basic solution provided by this utility model is as follows: an air preheater with easily detachable tube bundles, comprising two support plates, several flue gas pipes, several clamping plates one and two, four support frames between the two support plates, several through holes on each support plate, both ends of each flue gas pipe rotating through the through holes on the support plate, and limiting grooves on each clamping plate one and two for engaging a row of flue gas pipes, and each clamping plate one and two can be detachably connected.

[0006] The working principle of this utility model is as follows: When it is necessary to install the flue gas pipes of the air preheater, firstly, pass both ends of a row of flue gas pipes through the through holes on the support plate, then bring clamp plate one and clamp plate two closer from both sides of the row of flue gas pipes so that each flue gas pipe is located in the limiting groove. Then, connect the connecting blocks at both ends of clamp plate one and clamp plate two, so that clamp plate one and clamp plate two can clamp a row of flue gas pipes. After that, install the air preheater in the boiler system, and the flue gas enters the air between the flue gas pipes for high-efficiency heat exchange.

[0007] When maintenance is required, first remove the detachable connection on the connecting block, then remove clamp plate one and clamp plate two, unscrew the limit ring, and the flue pipe can be taken out from the through hole of the support plate for replacement or repair.

[0008] The beneficial effects of this utility model are as follows: by setting up detachable clamping plates one and two, and flue gas pipes that rotate through the support plate, the tube bundle can be disassembled conveniently and quickly, making it easy to replace flue gas pipes that are corroded or damaged, thus improving maintenance efficiency and ensuring the performance of the air preheater and the stable operation of the boiler system.

[0009] Option 2, which is a preferred option of the basic option, has connecting blocks at both ends of each of the first and second clamping plates, and the two connecting blocks are bolted together. By connecting the connecting blocks at both ends of the first and second clamping plates with bolts, it is easy to disassemble them by simply unscrewing the bolts, thus improving the convenience of disassembly and installation.

[0010] Option 3, a preferred option of the basic option, has a threaded end at one end of each flue gas pipe extending to the support plate, and a limit ring is threaded to both ends of each flue gas pipe. The limit ring is located directly above the limit groove. The limit ring can prevent the flue gas pipe from falling out of the through hole of the support plate during operation, further fix the position of the flue gas pipe, and improve the stability of the tube bundle.

[0011] Option 4, which is the preferred option of Option 3, has a flared nozzle on the limiting ring; the flared nozzle facilitates the guidance of flue gas into the flue pipe, making the flue gas flow more smoothly and improving the heat transfer efficiency.

[0012] Option 5, which is the preferred option of option 4, has a filter screen on the nozzle; the filter screen can filter impurities in the flue gas, prevent impurities from entering the flue pipe, avoid blockage or wear of the flue pipe, and extend the service life of the flue pipe.

[0013] Option 6, which is a preferred option of the basic option, has several baffles between the two support plates. The baffles can change the flow path of the flue gas, allowing the flue gas to flow fully in the air preheater, increasing the contact time and area between the flue gas and the flue gas pipe, and improving the heat transfer efficiency. Attached Figure Description

[0014] Figure 1 This is a front view of an air preheater with easily detachable tube bundles according to this utility model;

[0015] Figure 2 for Figure 1 Sectional view at point AA;

[0016] Figure 3 This is a top view of an air preheater with easily detachable tube bundles according to this utility model;

[0017] Figure 4 This is a partial perspective view of the connection between the flue gas pipe and clamp plate one and clamp plate two in an air preheater with an easily disassembled tube bundle according to this utility model.

[0018] Figure 5 This is a partial exploded view of the connection between the flue gas pipe and clamp plate one and clamp plate two in an air preheater with easily disassembled tube bundle according to this utility model. Detailed Implementation

[0019] The present invention will be further described in detail below through specific embodiments:

[0020] The reference numerals in the accompanying drawings of the instruction manual include: 1. support plate; 2. flue pipe; 3. clamping plate one; 4. clamping plate two; 5. limiting groove; 6. connecting block; 7. limiting ring; 8. horn nozzle; 9. filter screen; 10. baffle plate; 11. support frame.

[0021] like Figures 1 to 5 The image shows an air preheater with easily disassembled tube bundles, comprising two support plates 1, several flue gas pipes 2, several clamping plates 3 and 4, four support frames 11 between the two support plates 1, each support plate 1 having several through holes, both ends of each flue gas pipe 2 rotatably passing through the through holes on the support plate 1, the outer wall of each flue gas pipe 2 being coated with an anti-rust coating, each clamping plate 3 and clamping plate 4 having limiting grooves 5 for engaging a row of flue gas pipes 2, and both ends of each clamping plate 3 and clamping plate 4 having connecting blocks 6. Two connecting blocks 6 are connected by bolts. Each flue pipe 2 extends to one end of the support plate 1 and is threaded. Both ends of each flue pipe 2 are threaded with limit rings 7. The limit rings 7 are located directly above the limit grooves 5. The limit rings 7 are provided with bell mouths 8. A filter screen 9 is tied to the bell mouths 8 with wire. Several baffles 10 are provided between the two support plates 1. The two support frames 11 are bolted together with reinforcing ribs. The surface of the reinforcing ribs is connected to the surface of the outermost flue pipe to prevent air impact from causing deformation of the outermost flue pipe.

[0022] The implementation method of this embodiment is as follows: When it is necessary to install the flue gas pipe 2 of the air preheater, first pass both ends of the flue gas pipe 2 through the through holes on the support plate 1, then bring the clamp 3 and clamp 4 close to both sides of the flue gas pipe 2 so that each flue gas pipe 2 is located in the limiting groove 5. Then connect the connecting blocks 6 at both ends of the clamp 3 and clamp 4 with bolts, then screw the limiting ring 7 on the end of the flue gas pipe 2 that extends out of the support plate 1, and finally tie the filter screen 9 to the horn mouth 8 with iron wire. Then install the air preheater in the boiler system. The flue gas enters the flue gas pipe 2 through the horn mouth 8, the filter screen 9 filters impurities, and the air enters the gap between each flue gas pipe 2 through one side of the air preheater. The baffle 10 guides the air flow to carry out high-efficiency heat exchange.

[0023] When maintenance is required, unscrew the bolts on the connecting block 6, disassemble the clamping plate 3 and clamping plate 4, and unscrew the limiting ring 7. Then the flue pipe 2 can be removed from the through hole of the support plate 1 for replacement or repair.

[0024] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An air preheater with easily disassembled tube bundles, characterized in that, It includes two support plates (1), several flue pipes (2), several clamping plates one (3) and clamping plates two (4), four support frames (11) are provided between the two support plates (1), each support plate (1) is provided with several through holes, both ends of each flue pipe (2) are rotatably connected to the through holes on the support plate (1), each clamping plate one (3) and clamping plate two (4) is provided with several limiting grooves (5) for clamping a row of flue pipes (2), and both ends of each clamping plate one (3) and clamping plate two (4) are detachably connected.

2. An air preheater with easily disassembled tube bundles according to claim 1, characterized in that, Each of the first clamping plate (3) and the second clamping plate (4) is provided with a connecting block (6) at both ends, and the two connecting blocks (6) are bolted together.

3. An air preheater with easily disassembled tube bundles according to claim 1, characterized in that, Each of the flue pipes (2) is threaded at one end extending to the support plate (1), and each of the flue pipes (2) is threaded to both ends with a limiting ring (7), which is located directly above the limiting groove (5).

4. An air preheater with easily disassembled tube bundles according to claim 3, characterized in that, The limiting ring (7) is provided with a flared mouth (8).

5. An air preheater with easily disassembled tube bundles according to claim 4, characterized in that, The horn mouth (8) is provided with a filter screen (9).

6. An air preheater with easily disassembled tube bundles according to claim 1, characterized in that, A plurality of baffles (10) are provided between the two support plates (1).

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