CN206257659U - The middle temperature flue gas recirculation device of high temperature corrosion is prevented for PI type boilers - Google Patents
The middle temperature flue gas recirculation device of high temperature corrosion is prevented for PI type boilers Download PDFInfo
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- CN206257659U CN206257659U CN201620893112.9U CN201620893112U CN206257659U CN 206257659 U CN206257659 U CN 206257659U CN 201620893112 U CN201620893112 U CN 201620893112U CN 206257659 U CN206257659 U CN 206257659U
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Abstract
A kind of middle temperature flue gas recirculation device for preventing high temperature corrosion for PI type boilers.At present, most domestic power plant all employs low nitrogen staged combustion device, the discharge for reducing nitrogen oxides；But the application of staged combustion device so that main burner region is chronically under high-temperature reductibility atmosphere, the region is easy to the phenomenon that high temperature corrosion occurs.The utility model composition includes：Smoking mouth（1）, described smoking mouthful is installed in boiler economizer（2）Exit region Zhong Wen flue gases area, described smoking mouthful and flue gas recycled flue（3）Connection, blower fan is provided with described flue gas recycled flue（4）, described flue gas recycled flue and expansion joint（5）Connection, described expansion joint and flue gas spout（6）Connection, described flue gas spout is arranged on easily there is the burner hearth of high temperature corrosion（7）Region, described burner hearth passes through flue and deduster（8）Connection.The utility model is applied to PI type pulverized-coal fired boiler high temperature corrosion resistances.
Description
Technical field：
The utility model is related to a kind of middle temperature flue gas recirculation device for preventing high temperature corrosion for PI type boilers.
Background technology：
At present, most domestic power plant all employs low nitrogen staged combustion device, the discharge for reducing nitrogen oxides；But
It is the application of staged combustion device so that main burner region is chronically under high-temperature reductibility atmosphere, the region is easy to hair
The phenomenon of raw high temperature corrosion.Even if existing burner prevents the generation of phenomenon here, but effect by designing the thoughts such as adherent wind
Fruit is not obvious；Simultaneously very big plus the fluctuation of burning coal sulfur content, the sulfur content of many atures of coal is very high, more exacerbates in stove
The situation of water wall high temperature corrosion；Because the problem booster phenomenon of high temperature corrosion takes place frequently in stove, the safety of boiler has been had a strong impact on
Stable operation；In the unit that this phenomenon generally existing is run with the country.
The content of the invention：
The purpose of this utility model is to provide and a kind of prevents the middle temperature flue gas recirculation of high temperature corrosion from filling for PI type boilers
Put.
Above-mentioned purpose is realized by following device scheme：
A kind of middle temperature flue gas recirculation device for preventing high temperature corrosion for PI type boilers, its composition includes：PI type boilers
Smoking mouth, described PI type boiler smokings mouth is arranged on PI type boiler economizer exit region Zhong Wen flue gases area, described PI types
Boiler smoking mouth is connected with flue gas recycled flue, and blower fan, described recycling are provided with described flue gas recycled flue
Flue gases duct is connected with expansion joint, and described expansion joint is connected with PI type boiler smoke spouts, described PI type boiler smoke gas blowouts
Mouth is arranged on easily there is the hearth region of high temperature corrosion, and described burner hearth is connected by flue with deduster.
The beneficial effects of the utility model：
The utility model is used for PI type boilers prevents the PI types boiler of the middle temperature flue gas recirculation device of high temperature corrosion from smoking
Mouthful according to actual conditions be arranged in PI types boiler economizer outlet after middle temperature smoke-gas area, so as to extract by fully burning,
The middle temperature flue gas that oxygen amount is higher, hydrogen sulfide content is very low；Flue gas is by after flue, in the presence of flue gas blower fan, being arranged at
Spout on boiler furnace is injected into easily there is the nearly water-cooled wall region of high temperature corrosion, significantly reduce the S of nearly water-cooled wall region
Compound（H2S）Concentration, reduce occur high temperature corrosion probability；Due to only one layer of wind film need to be formed in nearly water-cooled wall region,
To prevent the S compounds in flue gas（H2S）Contact water-cooling wall, therefore required exhaust gas volumn very little, do not interfere with the overall caloric receptivity of boiler
Proportioning, meanwhile, blower fan is devised on the flue, ensure that wherein warm flue gas has enough pressure to be formed in nearly water-cooled wall region
The wind film of high speed.
This, on generating plant pulverized coal boiler, can effectively reduce the H of nearly water-cooled wall region using new application2S concentration, Ke Yi great
Width slows down the high temperature corrosion phenomenon of water-cooling wall so that boiler safe and stable can run.
Brief description of the drawings：
Accompanying drawing 1 is structural representation of the present utility model.
Specific embodiment：
Embodiment 1：
A kind of middle temperature flue gas recirculation device for preventing high temperature corrosion for PI type boilers, its composition includes：PI type boilers
Smoking mouth 1, described PI type boiler smokings mouth is arranged on the exit region Zhong Wen flue gases area of PI types boiler economizer 2, described PI
Type boiler smoking mouth is connected with flue gas recycled flue 3, is provided with blower fan 4 on described flue gas recycled flue, it is described again
Circulating flue gas flue is connected with expansion joint 5, and described expansion joint is connected with flue gas spout 6, described PI type boiler smoke spouts
Installed in easily there is the region of burner hearth 7 of high temperature corrosion, described PI types boiler furnace is connected by flue with deduster 8.
Claims (1)
1. a kind of middle temperature flue gas recirculation device for preventing high temperature corrosion for PI type boilers, its composition includes：Extract through overcharging
The PI type boiler smoking mouths of the middle temperature flue gas that divided combustion, oxygen amount are higher, hydrogen sulfide content is very low, it is characterized in that：Described PI types
Boiler smoking mouth is arranged on PI type boiler economizer exit region Zhong Wen flue gases area, described PI types boiler smoking mouth and recycling
Flue gases duct is connected, and blower fan is provided with described flue gas recycled flue, and described flue gas recycled flue connects with expansion joint
Connect, described expansion joint is connected with PI type boiler smoke spouts；Described PI type boiler smokes spout is arranged on easily there is high temperature
The hearth region of corrosion, and it is arranged at the nearly water-cooling wall area that the spout on boiler furnace is injected into easily generation high temperature corrosion
Domain, described burner hearth is connected by flue with deduster, and described blower fan is available to the pressure of middle temperature flue gas so that middle temperature cigarette
Gas has enough pressure that the blower fan of the wind film of high speed is formed in nearly water-cooled wall region, and one layer of wind film is formed in nearly water-cooled wall region,
To prevent the sulfide in flue gas from contacting water-cooling wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620893112.9U CN206257659U (en) | 2016-08-17 | 2016-08-17 | The middle temperature flue gas recirculation device of high temperature corrosion is prevented for PI type boilers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620893112.9U CN206257659U (en) | 2016-08-17 | 2016-08-17 | The middle temperature flue gas recirculation device of high temperature corrosion is prevented for PI type boilers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206257659U true CN206257659U (en) | 2017-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620893112.9U Active CN206257659U (en) | 2016-08-17 | 2016-08-17 | The middle temperature flue gas recirculation device of high temperature corrosion is prevented for PI type boilers |
Country Status (1)
| Country | Link |
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| CN (1) | CN206257659U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906511A (en) * | 2017-12-07 | 2018-04-13 | 浙江大学 | A kind of middle low-temperature flue gas dual-cycle plant and its method for preventing high-alkali coal slagging |
| CN110486716A (en) * | 2019-09-11 | 2019-11-22 | 西安热工研究院有限公司 | A kind of system and method reducing the NOx that W flame boiler combustion generates |
-
2016
- 2016-08-17 CN CN201620893112.9U patent/CN206257659U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906511A (en) * | 2017-12-07 | 2018-04-13 | 浙江大学 | A kind of middle low-temperature flue gas dual-cycle plant and its method for preventing high-alkali coal slagging |
| CN110486716A (en) * | 2019-09-11 | 2019-11-22 | 西安热工研究院有限公司 | A kind of system and method reducing the NOx that W flame boiler combustion generates |
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