CN206257685U - The high-temperature flue gas EGR of high temperature corrosion is prevented for tower boiler - Google Patents
The high-temperature flue gas EGR of high temperature corrosion is prevented for tower boiler Download PDFInfo
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- CN206257685U CN206257685U CN201620893065.8U CN201620893065U CN206257685U CN 206257685 U CN206257685 U CN 206257685U CN 201620893065 U CN201620893065 U CN 201620893065U CN 206257685 U CN206257685 U CN 206257685U
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- flue gas
- tower boiler
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- burner hearth
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Abstract
The utility model is related to a kind of high-temperature flue gas EGR for preventing high temperature corrosion for tower boiler.Most domestic power plant all employs low nitrogen grading combustion technology, the discharge for reducing nitrogen oxides；But the application of grading combustion technology 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：Tower boiler burner hearth（1）, tower boiler flue gas spout is installed on the region of the easy generation high temperature corrosion in described tower boiler burner hearth（2）, described flue gas spout is by expansion joint（3）With flue gas recycled flue（4）Connection, described flue gas recycled flue and tower boiler smoking port（5）Connection, described tower boiler smoking port is arranged on the high-temperature flue gas area in tower boiler burner hearth exit, has flue gas blower fan on described flue gas recycled flue（7）, described tower boiler burner hearth is by flue and deduster（6）Connection.The utility model is applied to tower pulverized-coal fired boiler high temperature corrosion resistance.
Description
Technical field：
The utility model is related to a kind of high-temperature flue gas EGR for preventing high temperature corrosion for tower boiler.
Background technology：
At present, most domestic power plant all employs low nitrogen grading combustion technology, the discharge for reducing nitrogen oxides；But
It is the application of grading combustion technology 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 combustion technology 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
Because the problem booster phenomenon of high temperature corrosion takes place frequently in the situation of water wall high temperature corrosion, 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 be to provide it is a kind of for tower boiler prevent high temperature corrosion high-temperature flue gas recycle dress
Put.
Above-mentioned purpose is realized by following technical scheme：
A kind of high-temperature flue gas EGR for preventing high temperature corrosion for tower boiler, its composition includes：Tower boiler
Burner hearth, is provided with tower boiler flue gas spout on the region of the easy generation high temperature corrosion in described tower boiler burner hearth, described
Flue gas spout be connected with flue gas recycled flue by expansion joint, described flue gas recycled flue and tower boiler smoking port
Connection, described tower boiler smoking port is arranged on the high-temperature flue gas area in tower boiler burner hearth exit, described tower boiler
Burner hearth is connected by flue with deduster.
The beneficial effects of the utility model：
The utility model prevents the smoking mouthful of the high-temperature flue gas recirculating technique of high temperature corrosion for tower boiler according to reality
Border situation is arranged in the high-temperature flue gas region in tower boiler burner hearth exit, higher by fully burning, oxygen amount to extract
High-temperature flue gas, by after flue, in the presence of flue gas blower fan, the spout being arranged on tower boiler burner hearth is injected into flue gas
Easily there is the nearly water-cooled wall region of high temperature corrosion, significantly reduce the S compounds of nearly water-cooled wall region（H2S）Concentration, reduce
There is the probability of high temperature corrosion.Due to that only need to form one layer of wind film 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 proportioning of tower boiler boiler, meanwhile, should
Blower fan is devised on flue, ensure that fully burning, oxygen amount high-temperature flue gas higher have enough pressure in nearly water-cooling wall area
Domain forms the wind film of high speed.
The utility model is applied on generating plant pulverized coal boiler, can effectively reduce the H of nearly water-cooled wall region2S 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 high-temperature flue gas EGR for preventing high temperature corrosion for tower boiler, its composition includes：Tower boiler
Burner hearth 1, tower boiler flue gas spout 2, institute are provided with the region of the easy generation high temperature corrosion in described tower boiler burner hearth
The flue gas spout stated is connected by expansion joint 3 with flue gas recycled flue 4, has flue gas wind on described flue gas recycled flue
Machine 7, described flue gas recycled flue is connected with tower boiler smoking port 5, and described tower boiler smoking port is arranged on tower
High-temperature flue gas area at boiler furnace outlet, described tower boiler burner hearth is connected by flue with deduster 6.
Claims (1)
1. a kind of high-temperature flue gas EGR for preventing high temperature corrosion for tower boiler, its composition includes：Tower type boiler
Thorax, it is characterized in that：The spray of tower boiler flue gas is installed on the region of the easy generation high temperature corrosion in described tower boiler burner hearth
Mouthful, and the spout being arranged on tower boiler burner hearth is injected into the nearly water-cooled wall region of easily generation high temperature corrosion, and it is described
Flue gas spout is connected by expansion joint with flue gas recycled flue, has flue gas blower fan, institute on described flue gas recycled flue
The flue gas recycled flue stated is connected with extraction by the tower boiler smoking port of fully burning, oxygen amount high-temperature flue gas higher, institute
The tower boiler smoking port stated is arranged on the high-temperature flue gas area in tower boiler burner hearth exit, and described tower boiler burner hearth passes through
Flue is connected with deduster, and described flue gas blower fan is available to the pressure of high-temperature flue gas so that high-temperature flue gas have enough pressure
The blower fan of the wind film of high speed is formed in nearly water-cooled wall region, one layer of wind film is formed come in preventing flue gas in nearly water-cooled wall region
Sulfide contacts water-cooling wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620893065.8U CN206257685U (en) | 2016-08-17 | 2016-08-17 | The high-temperature flue gas EGR of high temperature corrosion is prevented for tower boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620893065.8U CN206257685U (en) | 2016-08-17 | 2016-08-17 | The high-temperature flue gas EGR of high temperature corrosion is prevented for tower boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206257685U true CN206257685U (en) | 2017-06-16 |
Family
ID=59023750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620893065.8U Active CN206257685U (en) | 2016-08-17 | 2016-08-17 | The high-temperature flue gas EGR of high temperature corrosion is prevented for tower boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206257685U (en) |
-
2016
- 2016-08-17 CN CN201620893065.8U patent/CN206257685U/en active Active
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