CN103017137A - Low-temperature corrosion resisting structure of boiler - Google Patents
Low-temperature corrosion resisting structure of boiler Download PDFInfo
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- CN103017137A CN103017137A CN2012105770009A CN201210577000A CN103017137A CN 103017137 A CN103017137 A CN 103017137A CN 2012105770009 A CN2012105770009 A CN 2012105770009A CN 201210577000 A CN201210577000 A CN 201210577000A CN 103017137 A CN103017137 A CN 103017137A
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- temperature
- air preheater
- low temperature
- boiler
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Abstract
The invention discloses a low-temperature corrosion resisting structure of a boiler. The structure comprises a flue, a low temperature superheater, a low temperature reheater, an air preheater and a smoke baffle, wherein the low temperature superheater and the low temperature reheater are arranged side by side on the upper part of the flue, the air preheater is arranged under the low temperature superheater and the low temperature reheater, and the smoke baffle is arranged at the left side under the air preheater. The low-temperature corrosion resisting structure is simple, is convenient to install and is low in cost, the angle of the smoke baffle is properly adjusted to enable most smoke to drift from the side without the smoke baffle, the temperature of a pipeline is raised without dew formation, and the low temperature corrosion of the air preheater is effectively prevented.
Description
Technical field
The invention belongs to boiler manufacturing technology field, be specifically related to boiler anti-low-temperature corrosion structure.
Background technology
Cold end corrosion refers to occur in the sulfuric acid corrosion of heated surface at the end of boiler (economizer, air preheater).Combustion of sulfur in the fuel generates sulfur dioxide, and sulfur dioxide further is oxidized to sulfur trioxide under the effect of catalyst, and the water vapour of sulfur trioxide in flue gas is combined and generated sulfuric acid vapor.The existence of sulfuric acid vapor significantly raises the dew point of flue gas.Because the temperature of air preheater Air is lower, the flue-gas temperature of preheater section is not high, and wall temperature often is lower than flue gas dew point, and sulfuric acid vapor will condense on the Air Preheater Heating Surface like this, causes cold end corrosion.Sulfur content is higher in fuel, excess air coefficient is larger, and sulfur trioxide content raises in the flue gas, and dew point raises, and feed temperature is when low, and economizer also cold end corrosion might occur.
During heating surface generation cold end corrosion, can cause following harm:
When (1) the heat transfer element corrosion and damage is serious, need to change a large amount of heating surfaces, increase metal wastage.
(2) cause the tubular air preheater perforation, increase inleakage, not only affect the burning of fuel, the load of blower fan is increased, power consumption increases.
(3) cold end corrosion often is accompanied by the low temperature bonding dust stratification, and not only impact is conducted heat, and exhaust gas temperature is raise, and dust stratification can stop up exhaust gases passes when serious, and the flow resistance of flue gas increases, and the blower fan overload descends boiler output even is forced to the blowing out deashing.When producing cold end corrosion, the flying dust in the flue gas easily sticks on the moist heating surface, forms the low temperature bonding dust stratification, and in addition, corrosion makes heating surface rough surface injustice also easily produce dust stratification.
Summary of the invention
The defects that exists in order to overcome the prior art field, the object of the invention is to, a kind of boiler anti-low-temperature corrosion structure is provided, it is large because of the metal wastage that cold end corrosion causes to solve prior art, fuel can not fully burn, consume electric power, and produce the low temperature bonding fouling phenomenon, impact is conducted heat, even causes problems such as being forced to blowing out.
Boiler anti-low-temperature corrosion structure provided by the invention, it comprises flue, low temperature superheater, low-temperature reheater, air preheater and gas baffle, described low temperature superheater and low-temperature reheater are arranged side by side on flue top, described air preheater is arranged on the below of low temperature superheater and low-temperature reheater, and described gas baffle is arranged on the left side, below of air preheater.
Boiler anti-low-temperature corrosion structure provided by the invention, its beneficial effect is, and is simple in structure, easy for installation, cost is low, the angle of suitably regulating gas baffle allow most of flue gas never gas baffle one sidle, pipe temperature raises, and dewfall has not effectively prevented the cold end corrosion of air preheater.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention.
Mark among the figure:
1. flue; 2. low temperature superheater; 3. low-temperature reheater; 4. air preheater; 5. gas baffle.
The specific embodiment
With reference to the accompanying drawings, in conjunction with an embodiment, boiler anti-low-temperature corrosion structure provided by the invention is described in detail.
Embodiment
With reference to Fig. 1, the boiler anti-low-temperature corrosion structure of present embodiment, it comprises flue 1, low temperature superheater 2, low-temperature reheater 3, air preheater 4 and gas baffle 5, described low temperature superheater 2 and low-temperature reheater 3 are arranged side by side on flue 1 top, described air preheater 4 is arranged on the below of low temperature superheater 2 and low-temperature reheater 3, and described gas baffle 5 is arranged on the left side, below of air preheater 4.
Claims (1)
1. boiler anti-low-temperature corrosion structure, it is characterized in that: it comprises flue, low temperature superheater, low-temperature reheater, air preheater and gas baffle, described low temperature superheater and low-temperature reheater are arranged side by side on flue top, described air preheater is arranged on the below of low temperature superheater and low-temperature reheater, and described gas baffle is arranged on the left side, below of air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105770009A CN103017137A (en) | 2012-12-27 | 2012-12-27 | Low-temperature corrosion resisting structure of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105770009A CN103017137A (en) | 2012-12-27 | 2012-12-27 | Low-temperature corrosion resisting structure of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103017137A true CN103017137A (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105770009A Pending CN103017137A (en) | 2012-12-27 | 2012-12-27 | Low-temperature corrosion resisting structure of boiler |
Country Status (1)
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| CN (1) | CN103017137A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343976A (en) * | 2013-06-06 | 2013-10-09 | 西安热工研究院有限公司 | Method for improving heat primary air temperature of boiler with high moisture coal burned |
| CN110131746A (en) * | 2019-05-10 | 2019-08-16 | 哈尔滨锅炉厂有限责任公司 | Horizontal air preheater erosion protection system and anti-corrosion method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0233998A1 (en) * | 1986-02-28 | 1987-09-02 | Deutsche Babcock Werke Aktiengesellschaft | Preset flue gas temperature-adjusting device |
| CN1533490A (en) * | 2000-12-20 | 2004-09-29 | Ͳ | Boiler internal flue gas by-pass regulator for flue gas temperature control |
| CN201396779Y (en) * | 2009-05-05 | 2010-02-03 | 西安热工研究院有限公司 | Fume flow unbalance control fume system |
| CN202018050U (en) * | 2011-03-17 | 2011-10-26 | 西安热工研究院有限公司 | Flue gas bypass system for preventing low-temperature corrosion of an air preheater |
| CN102230614A (en) * | 2011-04-07 | 2011-11-02 | 上海锅炉厂有限公司 | Tower boiler with separated flues and adjustable flow |
| CN202032544U (en) * | 2011-04-11 | 2011-11-09 | 中国华能集团清洁能源技术研究院有限公司 | Invert pulverized-coal fired boiler arrangement structure for ultrahigh steam temperature steam parameter |
| CN202403248U (en) * | 2011-12-21 | 2012-08-29 | 哈尔滨锅炉厂有限责任公司 | 660 MW (medium wave) graded supercritical boiler |
| CN203052633U (en) * | 2012-12-27 | 2013-07-10 | 青岛胜利锅炉有限公司 | Boiler lower-temperature corrosion prevention structure |
-
2012
- 2012-12-27 CN CN2012105770009A patent/CN103017137A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0233998A1 (en) * | 1986-02-28 | 1987-09-02 | Deutsche Babcock Werke Aktiengesellschaft | Preset flue gas temperature-adjusting device |
| CN1533490A (en) * | 2000-12-20 | 2004-09-29 | Ͳ | Boiler internal flue gas by-pass regulator for flue gas temperature control |
| CN201396779Y (en) * | 2009-05-05 | 2010-02-03 | 西安热工研究院有限公司 | Fume flow unbalance control fume system |
| CN202018050U (en) * | 2011-03-17 | 2011-10-26 | 西安热工研究院有限公司 | Flue gas bypass system for preventing low-temperature corrosion of an air preheater |
| CN102230614A (en) * | 2011-04-07 | 2011-11-02 | 上海锅炉厂有限公司 | Tower boiler with separated flues and adjustable flow |
| CN202032544U (en) * | 2011-04-11 | 2011-11-09 | 中国华能集团清洁能源技术研究院有限公司 | Invert pulverized-coal fired boiler arrangement structure for ultrahigh steam temperature steam parameter |
| CN202403248U (en) * | 2011-12-21 | 2012-08-29 | 哈尔滨锅炉厂有限责任公司 | 660 MW (medium wave) graded supercritical boiler |
| CN203052633U (en) * | 2012-12-27 | 2013-07-10 | 青岛胜利锅炉有限公司 | Boiler lower-temperature corrosion prevention structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343976A (en) * | 2013-06-06 | 2013-10-09 | 西安热工研究院有限公司 | Method for improving heat primary air temperature of boiler with high moisture coal burned |
| CN110131746A (en) * | 2019-05-10 | 2019-08-16 | 哈尔滨锅炉厂有限责任公司 | Horizontal air preheater erosion protection system and anti-corrosion method |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130403 |