CN205560814U - Prevent flue device and boiler system of super temperature of boiler heating surface - Google Patents
Prevent flue device and boiler system of super temperature of boiler heating surface Download PDFInfo
- Publication number
- CN205560814U CN205560814U CN201620362773.9U CN201620362773U CN205560814U CN 205560814 U CN205560814 U CN 205560814U CN 201620362773 U CN201620362773 U CN 201620362773U CN 205560814 U CN205560814 U CN 205560814U
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- Prior art keywords
- flue
- air outlet
- cooling
- cooling air
- wind
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses a prevent flue device and boiler system of super temperature of boiler heating surface. The flue device includes the heat exchanger in flue and the flue, and the flue device includes still that the cooling air spouts into the pipeline, and the cooling air spouts to have into the pipeline locates the interior cooling air export of flue, the heat exchanger upper reaches are located in the cooling air export. The utility model discloses can effectively solve in the boiler flue problem of high temperature over heater or the super temperature of high -temperature reheater, have simple structure, arrange convenient advantage, can be directly transform in the boiler of present various grades, transform with low costsly, be particularly useful for receiving the serious power plant boiler of the super temperature of hot side.
Description
Technical field
This utility model belongs to the overtemperture control field of boiler heating surface, is specifically related to a kind of cigarette preventing boiler heating surface overtemperature
Duct device and steam generator system.
Background technology
Along with the fast development of China's power industry, coal burning boiler of power station also develops towards high parameter, jumbo direction,
The proportion shared in generating set of the unit of 600MW, 1000MW installed capacity is more and more higher, and has and progressively become the main force
The trend of generating set, and the manufacturing technology almost all of the above unit of China 600MW is introduced from external.
For introduction of boiler, although each manufacturing firm all have employed the most state-of-the-art technology, but owing to various countries' technology is sent out
The difference of exhibition level, inevitably also exists defect in design and manufacture, therefore builds up rear unit various problem also layer and go out
The poorest.Adding pressure, temperature grade more and more higher, the development more developed country of China's iron and steel cause is the most backward, boiler
Using the reasons such as coal type change is big, boiler heating surface overtemperature becomes great majority and introduces the common problem that unit exists, and this is right
The safe operation of boiler constitutes serious threat.
Heating surface overtemperature is the most serious, can be eliminated by cold test or firing optimization, but serious for some overtemperatures
, the overtemperatute of heating surface can not be effectively solved by above-mentioned adjustment.In heating surface in flue, high temperature superheater and
The overheating problem of high temperature reheater is the most prominent；High temperature superheater and high temperature reheater are that coal-burning boiler improves the important of the thermal efficiency
Heat exchanger, is also the parts that Temperature of Working is the highest in boiler, the most effectively controls the temperature of high temperature superheater and high temperature reheater
Operation safety and the thermal efficiency to coal-burning boiler are most important.
CN101776529B discloses a kind of structure preventing overtemperature of superheated vapor, and it is by offering bypass valve connection burner hearth and right
Flow flue reduces the exhaust gas volumn through high temperature superheater to regulate boiler heating surface temperature.This kind of structure constraint in boiler construction,
It is not particularly suited for high temperature superheater and coal burning boiler of power station that high temperature reheater is located in horizontal flue.If to superheater and reheating
Device entirety is transformed, and the most costly, on the other hand can not meet again boiler and transport under underload or event of overload
The requirement of vapor (steam) temperature during row；Prior art lacks the device of a kind of simple and effective reduction boiler heating surface overtemperature.
Utility model content
Content of the present utility model is to provide a kind of flue device preventing boiler heating surface overtemperature, thus directly at existing boiler
On the basis of structure, the problem of simple and effective solution boiler heating surface overtemperature.This utility model provides on a kind of use simultaneously
State the steam generator system of flue device.
In order to realize object above, this utility model prevents the flue device of boiler heating surface overtemperature from be the technical scheme is that
A kind of flue device preventing boiler heating surface overtemperature, including the heat exchanger in flue and flue, flue device also includes
Cooling wind sprays into pipeline, and cooling wind sprays into pipeline and has the cooling air outlet being located in flue, and described cooling air outlet is located at and is changed
Hot device upstream.
Described heat exchanger includes high temperature superheater and/or high temperature reheater.
Described cooling wind sprays into pipeline and is provided with electric flow control valve, and electric flow control valve controls connection controller, cigarette
The temperature sensor of the outlet temperature for detecting heat exchanger being connected with controller signals it is provided with in road.Temperature sensor is pacified
It is contained on the outlet tube wall of heating surface, or the method introduced according to CN103528041B, rationally increase high-temperature surface tube wall
Temperature measuring point, the pipe wall temperature change of monitoring high-temperature surface.Controller change according to the wall temperature of heating surface control out greatly or
Turn down valve opening, and then control cooling airflow amount.
Cooling wind sprays into pipeline and has the cooling air inlet for being connected with the air outlet of air preheater.Air preheater
Air outlet includes that First air outlet and secondary wind export, and the cooling air inlet that secondary wind outlet sprays into pipeline with cooling wind is connected.
The flue-gas temperature in this region can be effectively reduced after hot secondary wind and flue gas mixing；Meanwhile, being negative pressure in flue, secondary wind is just
Pressure, in the case of need not booster fan, secondary wind well can mix with flue gas.
Described cooling air outlet is towards heat exchanger.The quantity of cooling air outlet has multiple, and each cooling air outlet is arranged at least two
Individual along flue width spaced cooling air outlet group；Each cooling air outlet group all includes that at least two is along flue height
The spaced described cooling air outlet in direction.By the layout of the plurality of cooling air outlet group, cooling air outlet can be effective
Covering the whole overtemperature region of heat exchanger, by the overtemperature situation of cooling air outlet corresponding region, the corresponding cooling wind that controls sprays into
Flow, thus on the basis of taking into account boiler thermal output, effectively prevent High-temperature Superheater In A Boiler and/or high temperature reheater overtemperature.
The flue device preventing boiler heating surface overtemperature of the present utility model, has the advantages that (1) this utility model
Simple in construction, it is convenient to arrange, can directly transform in the boiler of existing various grades, and improvement cost is low, the suitableeest
For the station boiler that heating surface overtemperature is serious；(2) cooling air outlet is forward arranged along flue gas flow direction, can effectively prevent stifled ash；
(3) temperature sensor accesses the original intelligent front end of boiler, cost-effective；(4) secondary wind and flue it are effectively utilized
Pressure differential, secondary wind easily mixes with flue gas；(5) arrange many group cooling air outlet groups at flue width, can be sparged into
Cooling wind effectively covers whole region, it is achieved the Based Intelligent Control of wall temperature of heated surface.
Steam generator system of the present utility model be the technical scheme is that to include burner hearth and flue device, flue device include with
Flue that burner hearth is connected and the heat exchanger be located in flue, flue device also includes that cooling down wind sprays into pipeline, and cooling wind sprays into pipe
Road has the cooling air outlet being located in flue, and described cooling air outlet is located at heat exchanger upstream.
Steam generator system also includes air preheater, and air preheater has air outlet；Air outlet sprays into the cold of pipeline with cooling wind
But wind entrance is connected.The air outlet of air preheater includes that First air outlet and secondary wind export, secondary wind outlet and cooling
Wind sprays into the cooling air inlet of pipeline and is connected.
Preferably, the quantity of cooling air outlet has multiple, and each cooling air outlet is arranged at least two along between flue width
Every the cooling air outlet group arranged；Each cooling air outlet group all includes that at least two is spaced described along flue height direction
Cooling air outlet.
Steam generator system of the present utility model, does not limit original structure of boiler, arranges cooling by the upstream at heat exchanger
Wind exports, and can effectively prevent the heating surface overtemperature of boiler, it is adaptable to various coal burning boiler of power station, and application prospect is good.
Accompanying drawing explanation
Fig. 1 be this utility model steam generator system an embodiment in the structural representation of flue device part.
Detailed description of the invention
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
The embodiment of steam generator system of the present utility model, as it is shown in figure 1, include burner hearth, air heat exchanger and flue device,
Flue device includes that horizontal flue 1 and the high temperature superheater 2 being located in horizontal flue 1, its structure and annexation are existing
Technology；The direction of arrow is flue gas flow direction, and flue device also includes that cooling down wind sprays into pipeline, and described cooling wind sprays into pipeline and includes
Female pipe 8 and first arm the 3, second arm the 4, the 3rd arm 5, cooling air outlet group 30 corresponding to three arms is along flue
Width interval is arranged, and each cooling air outlet group 30 (cooling wind sprays into grid) has and sets along interval, flue height direction
Three cooling air outlets put；Cooling air outlet is positioned at high temperature superheater upstream, and towards high temperature superheater.First arm 3,
Being equipped with electric flow control valve 6 on second arm the 4, the 3rd arm 5, electric flow control valve 6 controls connection control
The controller of valve opening, controller is used for detecting the sensor of high temperature superheater outlet wall temperature with corresponding arm corresponding region
Signal connects, and opens big according to the temperature conditions of corresponding region or turns down valve opening.On female pipe 8, string is provided with total electronic stream
Regulation valve 7, total electronic stream regulation valve 7 controls connection a controller, controller be used for detecting high temperature superheater all outlet ports
The sensor signal of wall temperature connects, and regulates valve 7 aperture according to the required total electronic stream of cooling wind overall control.
Flue afterbody is provided with air preheater, air preheater have First air outlet and secondary wind export, First air outlet with
The First air entrance of boiler is connected, and secondary wind outlet connects secondary wind entrance and the cooling air inlet of female pipe 8 of boiler side by side.
The steam generator system of the present embodiment operationally, as the region of the first arm 3 correspondence, the outlet of high temperature superheater detected
Wall temperature exceeds standard, and temperature signal obtains the cooling airflow amount needed, total electronic stream regulation valve 7 and first after control centre calculates
The electric flow control valve that arm is corresponding controls valve opening, sprays into cooling wind to the region of the first arm 3 correspondence, thus has
Effect solves the high temperature superheater overheating problem of respective regions.
In other embodiments of steam generator system of the present utility model, heat exchanger can be high temperature reheater, can be respectively at high temperature
Superheater, the upstream of high temperature reheater arrange cooling wind and spray into pipeline；Temperature sensor can be in heating surface typical case's overtemperature region
It is arranged；Flue can be vertical flue；The quantity of arm can be more than 3 or less than 3, each arm cold
But wind outlet is not limited to 3；Cooling air inlet can connect the First air outlet of air preheater or be passed directly into less than cigarette
The cooling wind of temperature.
The flue device preventing boiler heating surface overtemperature of the present utility model, as it is shown in figure 1, the concrete structure of flue device with
Flue device in above-mentioned each steam generator system embodiment is identical, is not described in detail in this.
Claims (10)
1. prevent a flue device for boiler heating surface overtemperature, including the heat exchanger in flue and flue, it is characterised in that
Flue device also includes that cooling down wind sprays into pipeline, and cooling wind sprays into pipeline and has the cooling air outlet being located in flue, described cold
But wind outlet is positioned at heat exchanger upstream.
Prevent the flue device of boiler heating surface overtemperature the most as claimed in claim 1, it is characterised in that described cooling wind sprays
Entering pipeline and be provided with electric flow control valve, electric flow control valve controls connection controller, is provided with and controls in flue
The temperature sensor of the outlet temperature for detecting heat exchanger that device signal connects.
Prevent the flue device of boiler heating surface overtemperature the most as claimed in claim 1, it is characterised in that cooling air outlet court
To heat exchanger.
Prevent the flue device of boiler heating surface overtemperature the most as claimed in claim 1, it is characterised in that cooling wind sprays into pipe
There is the cooling air inlet for being connected with the air outlet of air preheater.
5. the flue device preventing boiler heating surface overtemperature as described in Claims 1 to 4 any one, it is characterised in that cold
But the quantity of wind outlet has multiple, and each cooling air outlet is arranged at least two along flue width spaced cooling wind
Outlet group；Each cooling air outlet group all include at least two along flue height direction spaced described cooling air outlet.
6. a steam generator system, including burner hearth and flue device, flue device includes the flue being connected with burner hearth and is located at flue
In heat exchanger, it is characterised in that flue device also includes that cooling down wind sprays into pipeline, and cooling wind sprays into pipeline to be had and be located at cigarette
Cooling air outlet in road, described cooling air outlet is located at heat exchanger upstream.
7. steam generator system as claimed in claim 6, it is characterised in that described cooling wind sprays into pipeline and is provided with electric flow
Regulation valve, electric flow control valve control connection have controller, be provided with in flue be connected with controller signals for detecting
The temperature sensor of the outlet temperature of heat exchanger.
8. steam generator system as claimed in claim 6, it is characterised in that steam generator system also includes air preheater, and air is pre-
Hot utensil has air outlet；The cooling air inlet that air outlet sprays into pipeline with cooling wind is connected.
9. steam generator system as claimed in claim 8, it is characterised in that the air outlet of air preheater includes that First air exports
Exporting with secondary wind, the cooling air inlet that secondary wind outlet sprays into pipeline with cooling wind is connected.
10. the steam generator system as described in claim 6～9 any one, it is characterised in that the quantity of cooling air outlet has many
Individual, each cooling air outlet is arranged at least two along flue width spaced cooling air outlet group；Each cooling wind goes out
Mouthful group all include at least two along flue height direction spaced described cooling air outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620362773.9U CN205560814U (en) | 2016-04-26 | 2016-04-26 | Prevent flue device and boiler system of super temperature of boiler heating surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620362773.9U CN205560814U (en) | 2016-04-26 | 2016-04-26 | Prevent flue device and boiler system of super temperature of boiler heating surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205560814U true CN205560814U (en) | 2016-09-07 |
Family
ID=56806681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620362773.9U Expired - Fee Related CN205560814U (en) | 2016-04-26 | 2016-04-26 | Prevent flue device and boiler system of super temperature of boiler heating surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205560814U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110207140A (en) * | 2019-04-25 | 2019-09-06 | 华电电力科学研究院有限公司 | A kind of heating surface of coal-fired boiler wall temperature regulating system and its working method |
| CN114754345A (en) * | 2022-04-24 | 2022-07-15 | 西安热工研究院有限公司 | Boiler and thermal power generating unit with baffle plate assembly |
-
2016
- 2016-04-26 CN CN201620362773.9U patent/CN205560814U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110207140A (en) * | 2019-04-25 | 2019-09-06 | 华电电力科学研究院有限公司 | A kind of heating surface of coal-fired boiler wall temperature regulating system and its working method |
| CN110207140B (en) * | 2019-04-25 | 2024-01-19 | 华电电力科学研究院有限公司 | Wall temperature adjusting system for heating surface of coal-fired boiler and working method thereof |
| CN114754345A (en) * | 2022-04-24 | 2022-07-15 | 西安热工研究院有限公司 | Boiler and thermal power generating unit with baffle plate assembly |
| CN114754345B (en) * | 2022-04-24 | 2024-05-24 | 西安热工研究院有限公司 | Boiler and thermal power generating unit with baffle assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160907 Termination date: 20170426 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |