CN206257658U - The low-temperature flue gas EGR of high temperature corrosion is prevented for tower boiler - Google Patents
The low-temperature flue gas EGR of high temperature corrosion is prevented for tower boiler Download PDFInfo
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- CN206257658U CN206257658U CN201620893111.4U CN201620893111U CN206257658U CN 206257658 U CN206257658 U CN 206257658U CN 201620893111 U CN201620893111 U CN 201620893111U CN 206257658 U CN206257658 U CN 206257658U
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Abstract
A kind of low-temperature flue gas EGR for preventing high temperature corrosion for tower boiler.At present, most domestic power plant employs low nitrogen grading combustion technology；But the application of grading combustion technology so that main burner region is chronically under high-temperature reductibility atmosphere, the region is susceptible to the phenomenon of high temperature corrosion.The utility model composition includes：Tower boiler smoking mouth（1）, installed in the low-temperature flue gas area of tower boiler flue, tower pot smoking mouth front end is provided with deduster to tower boiler smoking mouth（2）, tower boiler smoking mouth and flue gas recycled flue（3）Connection, has flue gas blower fan on flue gas recycled flue（4）, flue gas recycled flue is by expansion joint（5）With tower boiler chimney（6）Connection, tower boiler chimney is arranged on easily there is high temperature corrosion tower boiler burner hearth（7）On region.The utility model is applied to tower power station pulverized-coal fired boiler high temperature corrosion resistance.
Description
Technical field：
The utility model is related to a kind of low-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
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 be to provide it is a kind of for tower boiler prevent high temperature corrosion low-temperature flue gas recycle dress
Put.
Above-mentioned purpose is realized by following technical scheme：
A kind of low-temperature flue gas EGR for preventing high temperature corrosion for tower boiler, its composition includes：Tower boiler
Smoking mouth, described tower boiler smoking mouth is arranged on the low-temperature flue gas area of tower boiler flue, described tower pot smoking mouth
Front end is provided with deduster, and described tower boiler smoking mouth is connected with flue gas recycled flue, described flue gas recycled cigarette
There is flue gas blower fan, described flue gas recycled flue is connected by expansion joint with tower boiler chimney, described tower on road
Formula boiler chimney is arranged on easily to be occurred on high temperature corrosion tower boiler burner hearth region.
The beneficial effects of the utility model：
The smoking mouthful of the low-temperature flue gas recirculating technique for preventing high temperature corrosion for tower boiler of the invention is according to reality
Situation is arranged in the low-temperature flue gas region after boiler dust remover, to extract by desulfurization, out of stock, dustless flue gas, 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 easily there is high temperature corruption
The nearly water-cooled wall region of erosion, significantly reduces the S compounds of nearly water-cooled wall region（H2S）Concentration, reduce generation high temperature corrosion
Probability, prevent the S compounds in flue gas due to only one layer of wind film need to be formed in nearly water-cooled wall region（H2S）Contact water-cooling wall,
Therefore required exhaust gas volumn very little, the overall caloric receptivity proportioning of tower boiler is not interfered with, meanwhile, blower fan, energy are devised on the flue
Enough ensure that desulfurization, out of stock, dustless flue gas are formed the wind film of high speed by enough pressure in nearly water-cooled wall region.
The utility model is used for generating plant pulverized coal boiler, can effectively reduce the H of nearly water-cooled wall region2S concentration, can be significantly
Slow 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 low-temperature flue gas EGR for preventing high temperature corrosion for tower boiler, its composition includes：Tower boiler
Smoking mouth 1, described tower boiler smoking mouth is arranged on the low-temperature flue gas area of tower boiler flue, described tower pot smoking mouth
Front end is provided with deduster 2, and described tower boiler smoking mouth is connected with flue gas recycled flue 3, described flue gas recycled
There is flue gas blower fan 4, described flue gas recycled flue is connected by expansion joint 5 with tower boiler chimney 6, described on flue
Tower boiler chimney be arranged on easily and occur on the region of high temperature corrosion tower boiler burner hearth 7.
Claims (1)
1. a kind of low-temperature flue gas EGR for preventing high temperature corrosion for tower boiler, its composition includes：Extract by de-
Sulphur, denitration, the tower boiler smoking mouth of dustless flue gas, it is characterized in that：Described tower boiler smoking mouth is arranged on tower boiler
The low-temperature flue gas area of flue, described tower pot smoking mouth front end is provided with deduster, described tower boiler smoking mouth with again
Circulating flue gas flue is connected, and has flue gas blower fan on described flue gas recycled flue, and described flue gas recycled flue passes through
Expansion joint is connected with tower boiler chimney, and described tower boiler chimney is arranged on easily occurs high temperature corrosion tower type boiler
On thorax region, and the spout being arranged on tower boiler burner hearth is injected into and the nearly water-cooled wall region of high temperature corrosion easily occurs,
Described flue gas blower fan is available to the pressure of flue gas so that flue gas has enough pressure to form high speed in nearly water-cooled wall region
The blower fan of wind film, forms one layer of wind film to prevent the sulfide in flue gas from contacting water-cooling wall in nearly water-cooled wall region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620893111.4U CN206257658U (en) | 2016-08-17 | 2016-08-17 | The low-temperature flue gas EGR of high temperature corrosion is prevented for tower boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620893111.4U CN206257658U (en) | 2016-08-17 | 2016-08-17 | The low-temperature flue gas EGR of high temperature corrosion is prevented for tower boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206257658U true CN206257658U (en) | 2017-06-16 |
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ID=59022800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620893111.4U Active CN206257658U (en) | 2016-08-17 | 2016-08-17 | The low-temperature flue gas EGR of high temperature corrosion is prevented for tower boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206257658U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283741A (en) * | 2020-10-30 | 2021-01-29 | 陕西能源赵石畔煤电有限公司 | Device for preventing corrosion of water cooled wall of high-sulfur coal million units boiler |
-
2016
- 2016-08-17 CN CN201620893111.4U patent/CN206257658U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283741A (en) * | 2020-10-30 | 2021-01-29 | 陕西能源赵石畔煤电有限公司 | Device for preventing corrosion of water cooled wall of high-sulfur coal million units boiler |
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