CN2451997Y - Heat-transfer tube of air preheating device for boiler - Google Patents
Heat-transfer tube of air preheating device for boiler Download PDFInfo
- Publication number
- CN2451997Y CN2451997Y CN 00261134 CN00261134U CN2451997Y CN 2451997 Y CN2451997 Y CN 2451997Y CN 00261134 CN00261134 CN 00261134 CN 00261134 U CN00261134 U CN 00261134U CN 2451997 Y CN2451997 Y CN 2451997Y
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- CN
- China
- Prior art keywords
- heat
- boiler
- transfer tube
- utility
- preheating device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a heat-transfer tube of an air preheating device for a boiler, which belongs to the technical field of heat exchange. The utility model is characterized in that the utility model comprises a heat-transfer tube and a ceramic coating which is arranged on the end inner wall of the heat-transfer tube. The utility model solves the problems of corrosion and increased wind resistance caused by dust and water which are easy to accumulate at the end of the air preheating device for a boiler in use, extends the service life of the heat-transfer tube, and eliminates the wind resistance which is caused by dust accumulated in the heat-transfer tube.
Description
The utility model belongs to technical field of heat exchange, relates generally to the heat exchanger tube that is used for the employed boiler air preheater of steam power plant.
At present, being widely used in the Coefficient of Tube-type Air Preheater in Boiler of power plant, is to utilize the air waste heat in the boiler of power plant to carry out the heat conduction.But because it is longer to be used for heat conducting metal tube, and when hot gas reach its when terminal because heat falls sharply, temperature reduces and is easy to generate ponding and dust stratification, these ponding, dust stratification can produce serious corrosion to the end of heat-transfer pipe, shorten its service life (generally only being 2-3), and the dust of deposition is to the mobile operating efficiency that has produced large drag forces, had a strong impact on boiler air preheater of hot-air.
This novel purpose of this reality just provides a kind of air preheater heat transfer pipe that can overcome the terminal laying dust ponding of heat-transfer pipe and have antiseptic property.
The purpose of this utility model is achieved through the following technical solutions:
The boiler air preheater heat-transfer pipe is the metal cylinder that comprises air inlet and gas outlet, scribbles one deck ceramic layer on the inside pipe wall of gas outlet end.
In addition: the thickness of described ceramic layer is between 0.4-1mm; The length of the ceramic layer in the preheater heat-transfer pipe is 150-1000mm.
The boiler air preheater heat-transfer pipe that the utility model proposed is compared with prior art, owing in the 150-1000mm scope of the end of the heat-transfer pipe of preheater, be coated with the thin ceramic layer of one deck, make laying dust or ponding that it is terminal isolate, played etch-proof effect with metal inner surface.Bright and clean owing to ceramic aspect in addition, thus dust is difficult for piling up the windage that can reduce dust accretions greatly and form, and has improved the operating efficiency of boiler air preheater.
Be described in further detail below in conjunction with the structure and the principle of accompanying drawing the boiler air preheater heat-transfer pipe that the utility model proposed:
Fig. 1: the schematic diagram of boiler air preheater;
Fig. 2: be the profile of boiler air preheater heat-transfer pipe.
Be illustrated in figure 1 as the schematic diagram of boiler air preheater, its structure comprises the heat exchange casing 3 that has water inlet 1 and delivery port 2, and row has some metallic heat exchanger tubes 4 side by side on casing.High temperature hot gas in the boiler enters in pipe after tube wall is finished heat exchange with the water the casing from the air inlet 5 of metallic heat exchanger tube, and Cryogenic air is come out from the other end that exchanges pipe, finishes heat exchanging process.Be illustrated in figure 2 as the profile of heat exchange metal tube, on the inwall 7 of the gas outlet of metallic heat exchanger tube pipe 6 ends, be coated with the smooth ceramic layer 8 of a layer thickness 0.4-1mm, its length is decided according to the length l of metal tube, is generally 150mm-1000mm.This smooth ceramic layer can play the effect of flue gas laying dust to the corrosion of tube wall 7 that prevent, prolongs the service life of heat-exchange tube greatly.
Claims (3)
1. a boiler air preheater heat-transfer pipe is the metal cylinder that comprises air inlet and gas outlet, it is characterized by and scribble one deck ceramic layer on the inside pipe wall of gas outlet end.
2. boiler air preheater heat-transfer pipe as claimed in claim 1, the thickness that it is characterized by described ceramic layer is between 0.4-1mm.
3. boiler air preheater as claimed in claim 1 or 2, the length of heat-transfer pipe ceramic layer are 150-1000mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00261134 CN2451997Y (en) | 2000-10-31 | 2000-10-31 | Heat-transfer tube of air preheating device for boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00261134 CN2451997Y (en) | 2000-10-31 | 2000-10-31 | Heat-transfer tube of air preheating device for boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2451997Y true CN2451997Y (en) | 2001-10-03 |
Family
ID=33616734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00261134 Expired - Fee Related CN2451997Y (en) | 2000-10-31 | 2000-10-31 | Heat-transfer tube of air preheating device for boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2451997Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1299082C (en) * | 2003-10-24 | 2007-02-07 | 上海工程技术大学 | Preheater with controllable wind temperature for porcelain clay and methal |
| CN104374225A (en) * | 2014-11-20 | 2015-02-25 | 碧海舟（北京）石油化工设备有限公司 | Ceramic base body for industrial furnace heat exchanger and heat exchanger |
-
2000
- 2000-10-31 CN CN 00261134 patent/CN2451997Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1299082C (en) * | 2003-10-24 | 2007-02-07 | 上海工程技术大学 | Preheater with controllable wind temperature for porcelain clay and methal |
| CN104374225A (en) * | 2014-11-20 | 2015-02-25 | 碧海舟（北京）石油化工设备有限公司 | Ceramic base body for industrial furnace heat exchanger and heat exchanger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |