CN218936406U

CN218936406U - High-temperature air preheater

Info

Publication number: CN218936406U
Application number: CN202223308659.2U
Authority: CN
Inventors: 叶丽蓉; 许亚成; 朱超盛; 郭旺
Original assignee: Wuxi Tenghao Machinery Manufacturing Co ltd
Current assignee: Wuxi Tenghao Machinery Manufacturing Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-04-28
Anticipated expiration: 2032-12-09

Abstract

The utility model relates to a high-temperature air preheater which comprises a framework, wherein the framework is of a hollow structure, tube plates are respectively arranged at the left side and the right side of the inside of the framework, a plurality of heat exchange tubes penetrate through the tube plates, a tube orifice is arranged at the lower end of the outer part of the framework, a second inlet is arranged at the left side of the outer part of the framework, a second outlet is arranged at the right side of the outer part of the framework, the second inlet, the heat exchange tubes and the second outlet are communicated, the tube orifice is communicated with a diversion bellows, a first medium flows into the framework from one end of the tube orifice and flows out from the other end of the tube orifice, and a second medium flows into the heat exchange tubes from the second inlet and flows out from the second outlet so as to realize heat exchange between the first medium and the second medium. According to the high-temperature air preheater, the modularized heat exchange core is arranged on the framework, so that the structure is simple, and the replacement is convenient.

Description

High-temperature air preheater

Technical Field

The utility model relates to the technical field of preheaters, in particular to a high-temperature air preheater.

Background

The air preheater is an important device for preheating the air entering the boiler by utilizing the waste heat of the flue gas so as to improve the efficiency of the heating furnace and save energy and reduce consumption, so that in the design of the boiler, how to reasonably select the air preheater is important. The flue gas used by the high-temperature air preheater is generally more than 400 ℃, the heat exchange tube is extremely easy to crack by thermal expansion in a high-temperature environment, and the high-temperature flue gas is generally high in dust content, so that the heat exchange tube is seriously scoured due to the too high wind speed, and the service life of the heat exchange tube is shortened.

Therefore, it is necessary to design an air preheater structure with high heat exchange efficiency and long service life.

Disclosure of Invention

In view of the foregoing shortcomings of the prior art, it is an object of the present utility model to provide a high temperature air preheater that solves one or more of the problems of the prior art.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a high temperature air pre-heater, high temperature air pre-heater includes the skeleton, the skeleton has hollow structure, the inside left and right sides of skeleton sets up the tube sheet respectively, pass a plurality of heat exchange tubes between the tube sheet, the outside lower extreme of skeleton sets up the mouth of pipe, the outside left side of skeleton sets up the second import, the outside right side of skeleton sets up the second export, second import, heat exchange tube, second export intercommunication, mouth of pipe and water conservancy diversion bellows intercommunication, in the first medium flowed into the skeleton from mouth of pipe one end, the rethread mouth of pipe other end flowed, and the second medium flowed into the heat exchange tube from the second import, flowed through the second export to realize first medium and second medium heat transfer.

Further, a partition plate is arranged in the pipe orifice, and divides the pipe orifice into a first inlet and a first outlet.

Further, the heat exchange tube is a wave tube.

Further, the heat exchange tube is welded and fixed with the tube plate.

Furthermore, the heat exchange tube is made of aluminum alloy materials.

Further, a guide air box is arranged at the upper end of the outer part of the framework.

Further, the guide bellows is a semi-closed big-end.

Further, the front and the rear of the framework are respectively provided with a side plate.

Further, the pipe orifice, the second inlet and the second outlet are big and small heads.

Furthermore, the framework is formed by welding square pipes.

Compared with the prior art, the utility model has the following beneficial technical effects:

according to the high-temperature air preheater disclosed by the utility model, the modularized heat exchange core is arranged on the framework, so that the structure is simple, and the replacement is convenient.

And (II) the utility model adopts the wave tube, and the wave-shaped heat exchange tube can be freely expanded and contracted, thereby effectively avoiding thermal stress cracking.

And thirdly, the large and small head structures of the corrugated pipe and the pipe orifice reduce the flow rate of the flue gas, reduce the flushing of the flue gas on the heat exchange pipe, and prolong the service life of the equipment.

Drawings

Fig. 1 shows a schematic structural diagram of a high-temperature air preheater according to a first embodiment of the present utility model.

Fig. 2 shows a schematic structural diagram of a high-temperature air preheater according to a first embodiment of the present utility model.

Fig. 3 shows a schematic structural diagram of a high-temperature air preheater according to a first embodiment of the present utility model.

The reference numerals in the drawings:

1. a skeleton; 2. a tube sheet; 3. a wave tube; 4. a guide bellows; 5. a pipe orifice; 51. a first inlet; 52. a first outlet; 53. a partition plate; 6. a second inlet; 7. a second outlet; 8. and a side plate.

Detailed Description

For a better understanding of the utility model with objects, features and advantages, refer to the drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that any modifications, changes in the proportions, or adjustments of the sizes of structures, proportions, or otherwise, used in the practice of the utility model, are included in the spirit and scope of the utility model which is otherwise, without departing from the spirit or essential characteristics thereof.

In the description of the present utility model, the positional or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1

Referring to fig. 2, a high temperature air preheater comprises a framework 1, the framework 1 has a hollow structure, tube plates 2 are respectively arranged at the left side and the right side of the interior of the framework 1, a plurality of heat exchange tubes penetrate between the tube plates 2, a tube orifice 5 is arranged at the lower end of the exterior of the framework 1, a second inlet 6 is arranged at the left side of the exterior of the framework 1, a second outlet 7 is arranged at the right side of the exterior of the framework 1, the second inlet 6, the heat exchange tubes and the second outlet 7 are communicated, the tube orifice 5 is communicated with a guide bellows 4, a first medium flows into the framework 1 from one end of the tube orifice 5, flows out from the other end of the tube orifice 5, flows into the heat exchange tubes from the second inlet 6, and flows out from the second outlet 7, so that heat exchange between the first medium and the second medium is realized.

Specifically, in the high-temperature air preheater according to the first embodiment of the present utility model, the first medium is cold flue gas, and the second medium is hot flue gas.

Referring to fig. 1, 2 and 3, further, a partition 53 is disposed in the nozzle 5, and the partition 53 partitions the nozzle 5 into a first inlet 51 and a first outlet 52.

Referring to fig. 2, further, the heat exchange tube is a wave tube 3, and the wave heat exchange tube can be freely expanded and contracted, so as to effectively avoid thermal stress cracking. Specifically, the heat exchange tube is welded and fixed with the tube plate 2, and the heat exchange tube is made of an aluminum alloy material, and the aluminum alloy material has the advantages of light weight, low cost and high heat transfer efficiency.

Referring to fig. 2 and 3, further, a guide bellows 4 is disposed at the upper end of the outer portion of the framework 1. Referring to fig. 2 and 3, specifically, the guide bellows 4 is a semi-closed size head, and is capable of guiding the first medium entering from the first inlet 51 to the first outlet 52.

Referring to fig. 2, further, side plates 8 are respectively disposed at the front and rear sides of the framework 1, for sealing the front and rear ends of the framework 1.

Referring to fig. 1, 2 and 3, further, the nozzle 5, the second inlet 6 and the second outlet 7 are big and small heads, and the big and small heads have the functions of reducing the flow rate of the medium, damping and reducing the noise.

Furthermore, the framework 1 is formed by welding square pipes.

The specific working procedure of the utility model is as follows:

the second medium flows into the heat exchange tube from the second inlet 6 and conducts heat to the heat exchange tube and out through the second outlet 7. The first medium flows into the framework 1 from the first inlet 51, passes through gaps among the heat exchange tubes to reach the guide air box 4, turns through the guide air box 4, flows out through the first outlet 52, and takes away heat of the heat exchange tubes.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A high temperature air preheater, characterized in that: the high-temperature air preheater comprises a framework, the framework is provided with a hollow structure, tube plates are respectively arranged at the left side and the right side of the inside of the framework, a plurality of heat exchange tubes are penetrated between the tube plates, a tube orifice is arranged at the lower end of the outer part of the framework, a second inlet is arranged at the left side of the outer part of the framework, a second outlet is arranged at the right side of the outer part of the framework, the second inlet, the heat exchange tubes and the second outlet are communicated, the tube orifice is communicated with a guide bellows, a first medium flows into the framework from one end of the tube orifice, flows out from the other end of the tube orifice, flows into the heat exchange tubes from the second inlet, and flows out from the second outlet so as to realize heat exchange between the first medium and the second medium.

2. A high temperature air preheater as set forth in claim 1, wherein: a partition plate is arranged in the pipe orifice, and divides the pipe orifice into a first inlet and a first outlet.

3. A high temperature air preheater as set forth in claim 1, wherein: the heat exchange tube is a wave tube.

4. A high temperature air preheater as set forth in claim 3, wherein: the heat exchange tube is welded and fixed with the tube plate.

5. A high temperature air preheater as set forth in claim 3, wherein: the heat exchange tube is made of aluminum alloy materials.

6. A high temperature air preheater as set forth in claim 1, wherein: the upper end of the outer part of the framework is provided with a guide air box.

7. A high temperature air preheater as set forth in claim 6, wherein: the guide bellows is a semi-closed big-end and small-end.

8. A high temperature air preheater as set forth in claim 1, wherein: the front and the back of the framework are respectively provided with a side plate.

9. A high temperature air preheater as set forth in claim 1, wherein: the pipe orifice, the second inlet and the second outlet are big and small heads.

10. A high temperature air preheater as set forth in claim 1, wherein: the framework is formed by welding square tubes.