CN202329337U - Finned tube with low temperature dew point corrosion-resistant coating - Google Patents
Finned tube with low temperature dew point corrosion-resistant coating Download PDFInfo
- Publication number
- CN202329337U CN202329337U CN2011204381269U CN201120438126U CN202329337U CN 202329337 U CN202329337 U CN 202329337U CN 2011204381269 U CN2011204381269 U CN 2011204381269U CN 201120438126 U CN201120438126 U CN 201120438126U CN 202329337 U CN202329337 U CN 202329337U
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- finned tube
- coating
- diamond
- dew point
- tube
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Abstract
The utility model discloses a finned tube with a low temperature dew point corrosion-resistant coating, which includes a heat exchange tube and fins, wherein diamond-like coatings are attached onto the outer surfaces of the heat exchange tube and the fins by adopting the technology of plasma omnibearing deposition. The surface attachment rate is high, and the corrosion prevention effect is excellent; as the diamond-like coatings have smooth surface, low friction coefficient and excellent self abrasion resistance, the possibility of coating damage is little and the corrosion prevention effect is further improved; as the diamond-like coatings have high rigidity, the surface rigidity of the finned tube is greatly improved; and by adopting the technology of plasma omnibearing deposition, the finned tube has simple machining process, and is convenient to produce and low in cost.
Description
Technical field
The utility model relates to a kind of finned tube, relates in particular to a kind of finned tube with anti-low-temperature dew point corrosion coating.
Background technology
As everyone knows, finned tube normally passes through to increase fin structure on the surface of heat exchanger tube, increases the heat exchange area of heat exchanger tube, thereby reaches the purpose that improves heat exchange efficiency.Finned tube is as heat exchange element, is in for a long time under the environment of tail flue gas of firing equipment.Abominable such as boiler heat-exchanger with the finned tube environment for use, HTHP and be in corrosive atmosphere, this just requires finned tube should have very high performance indications.In actual use, owing to element sulphur in the fuel generates SO when burning
2, SO
3, mix with flue gas and to wash away finned tube.When the hull-skin temperature of finned tube is lower than the flue gas dew point temperature, on heat-transfer surface, will form the sulfuric acid mist dewdrop, cause finned tube to receive dew point corrosion.So-called dew point corrosion is exactly that process gas reaches transformation temperature at temperature-fall period and produces liquid dewfall (being dew point) in a broad aspect.At this moment, will in the moisture of dewfall, enrichment form acid as if some acidic materials of existence (as: sulphur, chlorine, nitrogen etc.) in the medium.Result from the flue gas of boiler emission such as modal dew point corrosion, main acidic materials are sulfide---sulfuric acid, sulfurous acid, and its concentration can particularly produce strong corrosion to stainless steel to metal up to 85%, cause the damage of finned tube.At present, the normal safeguard procedures that adopt of finned tube are: how apply erosion shield on the finned tube top layer, divide from the coating kind, be main with organic coating and metal coating.Wherein, organic coating is used for the protective lotion spot corrosion, and is simple relatively, with low cost on technology, but that ubiquitous drawback is a heatproof is low, heat transfer efficiency is poor, and for the higher coat of heatproof, its curing process is very complicated again and cost is higher; Come the protective lotion spot corrosion with metal coating; Heatproof is high, heat transfer efficiency is high, such as having solved heating furnace convection tube, preheater pipeline, electric precipitator etc., but in the processing metal coating; When adopting the plasma spraying metal dust, there is the lower shortcoming of adhesive rate on the curved surface.
The utility model content
The purpose of the utility model is to provide a kind of finned tube with anti-low-temperature dew point corrosion coating, and its face coat adhesive rate is high, and coating surface is smooth, wearability is good, makes anticorrosion ability obvious; Processing technology is simple, be convenient to produce, and cost is lower.
The purpose of the utility model is to realize through following technical scheme:
A kind of finned tube with anti-low-temperature dew point corrosion coating comprises heat exchanger tube and fin, all is attached with diamond-like coating on said heat exchanger tube and the fin outer surface.
Further, said diamond-like coating adopts the comprehensive deposition technique of plasma attached on heat exchanger tube and the fin outer surface.
The described finned tube with anti-low-temperature dew point corrosion coating of the utility model, its diamond-like coating adopt the comprehensive deposition technique of plasma attached on heat exchanger tube and the fin outer surface, and the surface attachment rate is high, and anticorrosion ability is good; Adopt diamond-like coating, coating surface is smooth, and coefficient of friction is low, and diamond-like coating self wearability is good simultaneously, makes that coating is difficult for being damaged, and has further improved anticorrosion ability; Diamond-like coating, hardness is high, has increased the case hardness of finned tube greatly; Adopt the comprehensive deposition technique of plasma, processing technology is simple, be convenient to produce, and cost is lower.
Description of drawings
According to accompanying drawing and embodiment the utility model is done further explain below.
Fig. 1 is the said fin tube structure sketch map with anti-low-temperature dew point corrosion coating of the utility model.
Among the figure:
1, heat exchanger tube, 2, fin, 3, diamond-like coating.
The specific embodiment
As shown in Figure 1, provided the said fin tube structure sketch map of the utility model with anti-low-temperature dew point corrosion coating, comprise heat exchanger tube 1 and fin 2, all be attached with diamond-like coating 3 on said heat exchanger tube 1 and fin 2 outer surfaces.
During production; Heat exchanger tube 1 and fin 2 are assembled; Then finned tube is installed in the vacuum tank, earlier the air in the vacuum tank is extracted out, make when vacuum in the vacuum tank is pumped to very low-pressure; Adopt argon gas exchange heat pipe 1 to carry out sputter clean, guarantee that can there be good adhesive on the surface with fin 2 surfaces.Under not removing vacuum condition, acetylene gas is injected in the vacuum system then; At this moment continuous being added on the finned tube of pulse voltage, will produce the aura pulsed discharge in the vacuum tank, produce plasma; The while pulse voltage also attracts the ion in the plasma to be attached to the surface of heat exchanger tube 1 and fin 2; According to ion energy (pulse voltage) and ionic species (discharge gas), accomplish the diamond-like coating deposition, thereby obtain desirable diamond-like coating.
Can improve the antiwear property and the corrosion resistance of finned tube material significantly through the evidence diamond-like coating.
Below be the test data contrast:
Correction data before and after the table one finned tube coating diamond-like coating
Correction data before and after handling in table two erosion test
| ? | Lesion width (μ m) | The lesion degree of depth (μ m) |
| Before stainless steel is handled | 7012 | 8.75 |
| After stainless steel is handled | 845 | 0.54 |
| Improvement effect | 8.3 doubly | 16.1 doubly |
Said finned tube with anti-low-temperature dew point corrosion coating, its face coat adhesive rate is high, and coating surface is smooth, wearability is good, makes anticorrosion ability obvious; Processing technology is simple, be convenient to produce, and cost is lower.
Claims (2)
1. the finned tube with anti-low-temperature dew point corrosion coating comprises heat exchanger tube (1) and fin (2), it is characterized in that: all be attached with diamond-like coating (3) on said heat exchanger tube (1) and fin (2) outer surface.
2. the finned tube with anti-low-temperature dew point corrosion coating according to claim 1 is characterized in that: said diamond-like coating (3) adopts the comprehensive deposition technique of plasma attached on heat exchanger tube (1) and fin (2) outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204381269U CN202329337U (en) | 2011-11-08 | 2011-11-08 | Finned tube with low temperature dew point corrosion-resistant coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204381269U CN202329337U (en) | 2011-11-08 | 2011-11-08 | Finned tube with low temperature dew point corrosion-resistant coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202329337U true CN202329337U (en) | 2012-07-11 |
Family
ID=46441318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204381269U Expired - Lifetime CN202329337U (en) | 2011-11-08 | 2011-11-08 | Finned tube with low temperature dew point corrosion-resistant coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202329337U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673712A (en) * | 2013-12-09 | 2014-03-26 | 杭州兴环科技开发有限公司 | Anti-corrosion finned tube |
-
2011
- 2011-11-08 CN CN2011204381269U patent/CN202329337U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673712A (en) * | 2013-12-09 | 2014-03-26 | 杭州兴环科技开发有限公司 | Anti-corrosion finned tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BIHAIZHOU (BEIJING) ENERGY SAVING AND ENVIRONMENTA Free format text: FORMER NAME: BIHAIZHOU (BEIJING) PETROCHEMICAL EQUIPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 100029 Beijing city Chaoyang District Xiaoguan Beili 45 Jiayuan century No. 5 Building 7 layer Patentee after: Bi Haizhou (Beijing) energy saving environmental protection equipment Co., Ltd. Address before: 100029 Beijing city Chaoyang District Xiaoguan Beili 45 Jiayuan century No. 5 Building 7 layer Patentee before: Bihaizhou (Beijing) Petrochemical Equipment Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |
|
| CX01 | Expiry of patent term |