CN206257688U - The middle temperature flue gas recirculation device of high temperature corrosion is prevented for tower boiler - Google Patents
The middle temperature flue gas recirculation device of high temperature corrosion is prevented for tower boiler Download PDFInfo
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- CN206257688U CN206257688U CN201620893084.0U CN201620893084U CN206257688U CN 206257688 U CN206257688 U CN 206257688U CN 201620893084 U CN201620893084 U CN 201620893084U CN 206257688 U CN206257688 U CN 206257688U
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Abstract
A kind of middle temperature flue gas recirculation device for preventing high temperature corrosion for tower boiler.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：Tower boiler burner hearth（1）, tower boiler flue gas spout is installed in tower boiler burner hearth（2）, tower boiler flue gas spout is by expansion joint（3）With flue gas recycled flue（4）Connection, has flue gas blower fan on flue gas recycled flue（5）, flue gas recycled flue and tower boiler smoking port（6）Connection, tower boiler smoking port is arranged on the Zhong Wen flue gases area of tower boiler exhanst gas outlet（7）, tower boiler smoking port front end has tower boiler economizer（8）, tower boiler exhanst gas outlet tail end has deduster（9）.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 middle temperature flue gas recirculation device for preventing high temperature corrosion for tower boiler.
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 tower boiler
Put.
Above-mentioned purpose is realized by following technical scheme：
A kind of middle temperature flue gas recirculation device for preventing high temperature corrosion for tower boiler, its composition includes：Tower boiler
Burner hearth, is provided with tower boiler flue gas spout in described tower boiler burner hearth, described tower boiler flue gas spout is by swollen
Swollen section is connected with flue gas recycled flue, has flue gas blower fan, described flue gas recycled on described flue gas recycled flue
Flue is connected with tower boiler smoking port, and described tower boiler smoking port is arranged on the middle temperature flue gas of tower boiler exhanst gas outlet
Area, described tower boiler smoking port front end has tower boiler economizer, and described tower boiler exhanst gas outlet tail end has
Deduster.
The beneficial effects of the utility model：
The utility model prevents the tower boiler of the middle temperature flue gas recirculation device of high temperature corrosion from smoking for tower boiler
Mouthful the middle temperature smoke-gas area after tower boiler economizer exit is arranged according to actual conditions, 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.
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 middle temperature flue gas recirculation device for preventing high temperature corrosion for tower boiler, its composition includes：Tower boiler
Burner hearth 1, is provided with tower boiler flue gas spout 2 in described tower boiler burner hearth, described tower boiler flue gas spout passes through
Expansion joint 3 is connected with flue gas recycled flue 4, has flue gas blower fan 5, described recycling on described flue gas recycled flue
Flue gases duct is connected with tower boiler smoking port 6, and described tower boiler smoking port is arranged in tower boiler exhanst gas outlet
Warm flue gas area 7, described tower boiler smoking port front end has tower boiler economizer 8, described tower boiler exhanst gas outlet
Tail end has deduster 9.
Claims (1)
1. a kind of middle temperature flue gas recirculation device for preventing high temperature corrosion for tower boiler, its composition includes：Tower type boiler
Thorax, it is characterized in that：Tower boiler flue gas spout is installed in described tower boiler burner hearth, and is arranged on boiler furnace
Spout be injected into the nearly water-cooled wall region of high temperature corrosion easily occur, described tower boiler flue gas spout by expansion joint with again
Circulating flue gas flue is connected, and has flue gas blower fan on described flue gas recycled flue, described flue gas recycled flue with take out
Learn from else's experience and overcharge that divided combustion, oxygen amount be higher, the connection of tower boiler smoking port of the very low middle temperature flue gas of hydrogen sulfide content, described is tower
Boiler smoking port is arranged on the Zhong Wen flue gases area of tower boiler exhanst gas outlet, and described tower boiler smoking port front end has tower
Boiler economizer, described tower boiler exhanst gas outlet tail end has deduster, and described flue gas blower fan is available to middle temperature cigarette
The pressure of gas causes that middle temperature flue gas has enough pressure that the blower fan of the wind film of high speed is formed in nearly water-cooled wall region, in nearly water-cooling wall
Region forms one layer of wind film to prevent the sulfide in flue gas from contacting water-cooling wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620893084.0U CN206257688U (en) | 2016-08-17 | 2016-08-17 | The middle temperature flue gas recirculation device of high temperature corrosion is prevented for tower boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620893084.0U CN206257688U (en) | 2016-08-17 | 2016-08-17 | The middle temperature flue gas recirculation device of high temperature corrosion is prevented for tower boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206257688U true CN206257688U (en) | 2017-06-16 |
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ID=59022927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620893084.0U Active CN206257688U (en) | 2016-08-17 | 2016-08-17 | The middle temperature flue gas recirculation device of high temperature corrosion is prevented for tower boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206257688U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822413A (en) * | 2019-11-11 | 2020-02-21 | 新疆大学 | Low NO of tower boiler under low loadXModerate temperature flue gas recirculation system and method |
| CN112880204A (en) * | 2021-03-15 | 2021-06-01 | 伟明环保设备有限公司 | Method for protecting smoke side smoke screen of boiler |
-
2016
- 2016-08-17 CN CN201620893084.0U patent/CN206257688U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822413A (en) * | 2019-11-11 | 2020-02-21 | 新疆大学 | Low NO of tower boiler under low loadXModerate temperature flue gas recirculation system and method |
| CN112880204A (en) * | 2021-03-15 | 2021-06-01 | 伟明环保设备有限公司 | Method for protecting smoke side smoke screen of boiler |
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