Air preheater convenient to disassemble and assemble and boiler system

Abstract

The utility model discloses an air preheater convenient to disassemble and assemble and a boiler system, and relates to the technical field of boiler equipment. The fixed bracket is used for supporting the air preheater main body; the air preheater body is detachably connected with the fixing support, and gaps are arranged between the two sides of the air preheater body and the fixing support. The air preheater main body can be independently detached from the fixed bracket, so that the maintenance and replacement processes are greatly simplified, and the maintenance cost and time are reduced; in addition, due to the interval design between the air preheater main body and the fixing support, not only is a moving space provided for disassembly and assembly work, but also the air preheater main body can be allowed to properly expand and contract at different temperatures, and the adaptability and durability of equipment are improved. The air preheater can be conveniently integrated into an existing boiler system, a boiler body does not need to be transformed on a large scale, and good compatibility and expansibility are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler equipment, in particular to an air preheater and a boiler system which are convenient for disassembly and assembly. Background Art

[0002] An air preheater is a heat exchange device widely used in boiler systems. Its main function is to preheat the air entering the boiler by using the heat in the boiler flue gas, thereby improving the thermal efficiency of the whole system and reducing fuel consumption. By recovering the heat in the flue gas, the air preheater can not only reduce the flue gas temperature and heat loss, but also effectively improve the operation efficiency of the boiler.

[0003] Although the air preheater plays an important role in the boiler system, there are some defects in the design of the existing air preheaters. The traditional air preheater and the fixed bracket are usually designed as a whole, which makes it necessary to disassemble the whole when maintenance or replacement of the air preheater is required. This process is not only time-consuming and laborious, but also increases the maintenance cost. Due to the fixed connection mode between the air preheater and the fixed bracket, the inspection and cleaning work of the air preheater becomes complicated, especially in the boiler flue gas passage with limited space. The rigid connection between the fixed bracket and the air preheater may cause deformation of the equipment in a high-temperature environment, affecting its long-term stability and reliability. Summary of the Utility Model

[0004] One of the purposes of the utility model is to provide an air preheater which is convenient for disassembly and assembly to improve the maintenance convenience of the air preheater.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme: an air preheater which is convenient for disassembly and assembly, comprising:

[0006] An air preheater main body for preheating the air input into the boiler;

[0007] A fixed bracket for supporting the air preheater main body;

[0008] The air preheater main body is detachably connected to the fixed bracket, and there is also a gap between both sides of the air preheater main body and the fixed bracket.

[0009] Preferably, a smoke inlet pipe body for connecting the flue gas passage is fixedly installed at the top of the fixed bracket, and a smoke outlet pipe body for connecting the flue gas passage is fixedly installed at the bottom of the fixed bracket. The upper and lower ends of the air preheater main body are detachably connected to the smoke inlet pipe body and the smoke outlet pipe body respectively.

[0010] More preferably, a sealing sleeve is connected between the upper end of the air preheater main body and the smoke inlet pipe body, and between the lower end of the air preheater main body and the smoke outlet pipe body.

[0011] More preferably, both sides of the middle part of the air preheater main body are respectively connected to a fixed bracket through a group of connecting rods. One end of the connecting rod is welded to the air preheater main body, and the other end is threadedly connected to the fixed bracket.

[0012] More preferably, a plurality of guide pipes for the flue gas to disperse and pass through are evenly arranged inside the air preheater main body. An air inlet is provided at the lower part of the rear side of the air preheater main body, and an exhaust port is provided at the upper part of the rear side. A U-shaped pipe for guiding air to pass through the gaps between the guide pipes for heat exchange is connected between the air inlet and the exhaust port.

[0013] In addition, the present utility model also provides a boiler system, which includes a boiler main body. The boiler main body is connected with the above-mentioned air preheater that is convenient for disassembly and assembly to improve the thermal efficiency of the boiler.

[0014] Compared with the prior art, by adopting a detachable connection structure, the air preheater main body can be independently disassembled from the fixed bracket, greatly simplifying the maintenance and replacement process, and reducing the maintenance cost and time. In addition, the interval design between the air preheater main body and the fixed bracket not only provides a moving space for the disassembly and assembly work, but also allows the air preheater main body to expand and contract appropriately at different temperatures, improving the adaptability and durability of the equipment. This air preheater can be conveniently integrated into the existing boiler system without large-scale modification of the boiler main body, and has good compatibility and expansibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure in the embodiment;

[0016] Figure 2 It is a schematic side view structure diagram in the embodiment;

[0017] Figure 3 For Figure 1 The cross-sectional structure diagram taken along the A-A direction in

[0018] In the figure:

[0019] 1 - air preheater main body 2 - fixed bracket 3 - smoke inlet pipe body

[0020] 4 - smoke exhaust port pipe body 5 - connecting rod 6 - guide pipe

[0021] 7 - air inlet 8 - exhaust port 9 - sealing sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] For the convenience of those skilled in the art, the present utility model will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the embodiments does not limit the present utility model.

[0023] It should be noted in advance that in the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween.

[0024] As Figures 1 to 3 shown, an air preheater that is convenient for disassembly and assembly includes an air preheater main body 1 for preheating the air input into the boiler; a fixed bracket 2 for supporting the air preheater main body 1; the air preheater main body 1 is detachably connected to the fixed bracket 2, and there is also a gap between the two sides of the air preheater main body 1 and the fixed bracket 2.

[0025] In the above structure, a smoke inlet pipe body 3 for connecting the flue gas passage is fixedly installed at the top end of the fixed bracket 2, and a smoke exhaust pipe body 4 for connecting the flue gas passage is fixedly installed at the bottom end of the fixed bracket 2. The upper and lower ends of the air preheater main body 1 are respectively detachably connected to the smoke inlet pipe body 3 and the smoke exhaust pipe body 4. To ensure the sealing effect, both between the upper end of the air preheater main body 1 and the smoke inlet pipe body 3 and between the lower end of the air preheater main body 1 and the smoke exhaust pipe body 4 are connected by a sealing sleeve 9, which can effectively prevent flue gas leakage and ensure the sealing and safety of the heat exchange process. In addition, the sealing sleeve 9 can be connected to the two structural parts by means of threaded connection to achieve the purpose of convenient disassembly and assembly.

[0026] Since the air preheater main body 1 usually has a relatively large length in the height direction, then considering the stability of the air preheater main body 1, both sides in the middle of the air preheater main body 1 are respectively connected to the fixed bracket 2 by a set of connecting rods 5. Among them, one end of the connecting rod 5 is welded to the air preheater main body 1 and the other end is threadedly connected to the fixed bracket 2.

[0027] In this embodiment, a plurality of diversion pipes 6 for the flue gas to disperse and pass through are evenly arranged inside the air preheater main body 1 (as Figure 3As shown in the figure, an air inlet 7 is provided at the lower part of the rear side of the air preheater main body 1, and an exhaust outlet 8 is provided at the upper part of the rear side. A U-shaped pipe for guiding air to pass through the gaps between the respective guide pipes 6 for heat exchange is connected between the air inlet 7 and the exhaust outlet 8. This structure can effectively guide air to pass through the gaps between the guide pipes for heat exchange, thereby improving the heat recovery utilization rate of the flue gas and the thermal efficiency of the boiler.

[0028] The disassembly and assembly steps of the easily disassembled and assembled air preheater provided by the above embodiment are as follows: First, shut down the boiler system to ensure safe operation. Before any disassembly and assembly work, it must be ensured that the boiler system has been completely shut down and cooled to a safe temperature. Then disconnect the connection between the air preheater main body 1 and the flue gas inlet pipe body 3 and the flue gas outlet pipe body 4, which can be achieved by untying the sealing sleeve 9. Next, remove the connecting rods 5 on both sides of the middle part of the air preheater main body 1 from the fixed bracket 2, and simply loosen the threaded connection. Using the detachable connection structure, the air preheater main body 1 can be independently disassembled from the fixed bracket 2. Then, necessary inspections, cleaning, or replacement of internal components such as the guide pipes or U-shaped pipes can be carried out on the disassembled air preheater main body 1. When reinstalling, reconnect the upper end of the air preheater main body 1 to the flue gas inlet pipe body 3 and the lower end to the flue gas outlet pipe body 4 through the sealing sleeve 9 to ensure tightness, and thread-connect all the connecting rods 5 to the fixed bracket 2. After completing all the disassembly and assembly steps, check the entire system to ensure that all components are correctly installed and firmly fixed, and then the boiler system can be restarted for operation testing.

[0029] Regarding the working principle process of this air preheater: First, the flue gas generated by the boiler enters the flue gas inlet end of the air preheater main body 1 through the flue gas inlet pipe body 3. And the unheated air enters through the air inlet 7 at the rear side of the air preheater main body 1, ready for heat exchange. The flue gas disperses into each guide pipe 6 inside the air preheater main body 1 and exchanges heat with the air guided by the U-shaped pipe, transferring the heat to the air. After heat exchange, the air is preheated and then discharged through the exhaust outlet 8 at the rear side of the air preheater main body 1. The preheated air is sent into the boiler combustion chamber, improving the combustion efficiency and thermal efficiency, and reducing fuel consumption at the same time.

[0030] The easily disassembled and assembled air preheater provided by the present utility model can not only be independently disassembled from the fixed bracket for convenient maintenance and replacement, but also can be easily integrated into the existing boiler system without large-scale modification of the boiler main body, and has good compatibility and expandability.

[0031] In order to enable those of ordinary skill in the art to more conveniently understand the improvements of the present utility model over the prior art, some of the drawings and descriptions of the present utility model have been simplified, and the above embodiments are preferred implementation schemes of the present utility model. In addition, the present utility model can also be implemented in other ways. Any obvious substitution without departing from the concept of the technical solution is within the protection scope of the present utility model.

Claims

1. An air preheater that is easy to disassemble and assemble, characterized in that: include: The air preheater body (1) is used to preheat the boiler input air; A fixed bracket (2) for supporting the air preheater body (1); The air preheater body (1) is detachably connected to the fixed bracket (2), and a gap is provided between the two sides of the air preheater body (1) and the fixed bracket (2).

2. The air preheater that is easy to disassemble and assemble according to claim 1 is characterized in that: A smoke inlet pipe body (3) for connecting to a smoke passage is fixedly mounted on the top end of the fixed bracket (2), a smoke exhaust pipe body (4) for connecting to the smoke passage is fixedly mounted on the bottom end of the fixed bracket (2), and the upper and lower ends of the air preheater body (1) are detachably connected to the smoke inlet pipe body (3) and the smoke exhaust pipe body (4), respectively.

3. The air preheater that is easy to disassemble and assemble according to claim 2 is characterized in that: The upper end of the air preheater body (1) and the smoke inlet pipe body (3), and the lower end of the air preheater body (1) and the smoke exhaust pipe body (4) are both connected via a sealing sleeve (9).

4. The air preheater that is easy to disassemble and assemble according to claim 3 is characterized in that: Both sides of the middle of the air preheater body (1) are connected to the fixed bracket (2) via a set of connecting rods (5), one end of the connecting rod (5) is welded to the air preheater body (1), and the other end is threadedly connected to the fixed bracket (2).

5. The air preheater that is easy to assemble and disassemble according to claim 4 is characterized in that: A plurality of guide tubes (6) for dispersing and passing smoke are evenly arranged inside the air preheater body (1); an air inlet (7) is arranged at the lower part of the rear side of the air preheater body (1); and an exhaust port (8) is arranged at the upper part of the rear side; a U-shaped tube is connected between the air inlet (7) and the exhaust port (8) to guide air to pass through the gaps between the guide tubes (6) so as to perform heat exchange.

6. A boiler system, comprising a boiler body, characterized in that: The boiler body is connected to the easily disassembled air preheater as claimed in claim 5, so as to improve the thermal efficiency of the boiler.

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