CN206439801U - Double reheat boiler tail twin flue structure - Google Patents
Double reheat boiler tail twin flue structure Download PDFInfo
- Publication number
- CN206439801U CN206439801U CN201720118510.8U CN201720118510U CN206439801U CN 206439801 U CN206439801 U CN 206439801U CN 201720118510 U CN201720118510 U CN 201720118510U CN 206439801 U CN206439801 U CN 206439801U
- Authority
- CN
- China
- Prior art keywords
- temperature
- flue
- low
- temperature zone
- economizer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model is a kind of double reheat boiler tail twin flue structure, the twin flue that back-end ductwork is disposed adjacent before and after being divided into, respectively the first flue and the second flue；First flue sequentially sets the first economizer is set below single reheat device low-temperature zone and secondary reheater low-temperature zone, secondary reheater low-temperature zone from top to bottom, and first stack base sets the first temperature-adjusting baffle；Second flue sets and the second economizer is set below low temperature superheater, the low temperature superheater, and second stack base sets the second temperature-adjusting baffle；3rd economizer is set between the single reheat device low-temperature zone and secondary reheater low-temperature zone.Having the beneficial effect that produced by the utility model：The utility model provides one kind once and double reheat steam temperature can be adjusted conveniently, highly reliable novel secondary reheat boiler afterbody twin flue structure.
Description
Technical field
The utility model is a kind of double reheat boiler tail structure in thermal power plant, for once and double reheat vapour
Temperature regulation.
Background technology
At present, China's Coal-fired group has been enter into maximization, high parameter stage, the 600MW of large quantities of 600 DEG C of grades and
1000MW ultra supercritical single reheat units have been put into commercial operation.Under current material structure（With HR3C, super 304H,
P91 and P92 materials are core）, it is difficult to greatly improve steam parameter again.Further to improve generatine set heat efficiency, current China exists
The exploitation of large-scale double reheat power generation sets is carried forward vigorously, and existing a small amount of double reheat power generation sets are put into commercial operation.For two
Secondary reheat boiler, difficult point is single reheat steam exit temperature and double reheat steam exit temperature in wide load range
（50%~100%BMCR）Regulation and can reach design load.
For the regulation of double reheat Boiler Reheated-steam Temperature, the temperature adjustment means that domestic and international boiler maker is used mainly have two
Kind, scheme one, the damper adjustment based on afterbody twin flue（It is auxiliary）The temperature adjustment of+flue gas recirculation（It is main）；Scheme two, based on three flues
Damper adjustment.The temperature adjustment principle of scheme one：Back-end ductwork is divided into the equal one-level reheater of arrangement in former and later two flues, each flue
Low-temperature zone and economizer, be respectively provided with baffle plate in each stack base.And set and pass through under flue gas recirculation system, different load
The flow of flue gas recirculation is adjusted to increase the heat exchange amount of back-end ductwork heating surface.It is aided with baffle plate regulation again, to adjust two
The flue gas flow of reheater in flue, and then adjust reheat steam temperature；The temperature adjustment principle of scheme two：Before, during and after back-end ductwork is divided into
Be respectively arranged once in three flues, three flues it is low again, it is secondary it is low again, low mistake, it is each it is low again with it is low later arrangement economizer,
Each flue outlet is respectively arranged gas proportioning damper.Design is reached by the regulating guarantee of three baffle plates reheat steam temperatures at different levels
Value.Scheme one, the problem of adjusting sensitive, but there is recirculation blower poor reliability, influence boiler efficiency；Scheme two, three gears
Plate is adjusted simultaneously, there is the problem of regulation performance is poor.
Utility model content
The technical problem that the utility model is solved i.e. provide it is a kind of once and double reheat steam temperature can be adjusted conveniently,
Highly reliable novel secondary reheat boiler afterbody twin flue structure.
The technological means that the utility model is used is as follows.A kind of double reheat boiler tail twin flue structure, afterbody cigarette
The twin flue that road is disposed adjacent before and after being divided into, respectively the first flue and the second flue；First flue is sequentially set from top to bottom
Put single reheat device low-temperature zone and secondary reheater low-temperature zone, the first economizer is set below secondary reheater low-temperature zone, this
One stack base sets the first temperature-adjusting baffle；Second flue, which is set, sets second below low temperature superheater, the low temperature superheater
Economizer, second stack base sets the second temperature-adjusting baffle；The single reheat device low-temperature zone and secondary reheater low-temperature zone it
Between set the 3rd economizer.
Having the beneficial effect that produced by the utility model：The utility model provides one kind once and double reheat steam temperature can
To facilitate regulation, highly reliable novel secondary reheat boiler afterbody twin flue structure.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in figure 1, the utility model is directed to the coal-powder boiler that П types are arranged, a kind of double cigarettes of double reheat boiler tail are provided
Road structure, the twin flue that its back-end ductwork is disposed adjacent before and after being divided into, respectively the first flue 1 and the second flue 2；
First flue 1 sequentially sets single reheat device low-temperature zone 11 and secondary reheater low-temperature zone 12, two from top to bottom
The secondary lower section of reheater low-temperature zone 12 sets the first economizer 13, and the bottom of the first flue 1 sets the first temperature-adjusting baffle 14.
Second flue 2 sets low temperature superheater 21, and the lower section of low temperature superheater 21 sets the second economizer 22, and this second
The bottom of flue 2 sets the second temperature-adjusting baffle 23.
3rd economizer 15 is set between the single reheat device low-temperature zone 11 and secondary reheater low-temperature zone 12.
When actual use, enthalpy that can be according to needed for heating surface increases reasonable selection and arrangement, it is ensured that main under design conditions to steam
The parameter of vapour, single reheat steam and double reheat steam reaches design load.
When working conditions change or steam parameter off-design value, to go bail for, steam parameter reaches design load, by turning down（It is negative
Lotus reduces）Or open big（Load rises）Second temperature-adjusting baffle 23 of the second flue 2 and the first temperature adjustment for suitably adjusting the first flue 1
Baffle plate 14, to change the flow in two flues, so as to change the heat exchange amount of two flue internal heating surfaces, realizes single reheat vapour
The regulation of gentle double reheat steam temperature, and realize that single reheat steam temperature reaches design load in this link.Due to secondary reheater
Enthalpy increase and be less than single reheat device, the suction of secondary reheater low-temperature zone is adjusted by the feedwater flow for adjusting the 3rd economizer 15
Heat, realizes that double reheat steam temperature reaches design load.
All parts are existing equipment in the utility model, and the connection of its working method and respective line is art technology
Known to personnel, it will not be repeated here.
Claims (1)
1. a kind of double reheat boiler tail twin flue structure, it is characterised in that it is double that back-end ductwork is disposed adjacent before and after being divided into
Flue, respectively the first flue and the second flue；
First flue sequentially sets single reheat device low-temperature zone and secondary reheater low-temperature zone from top to bottom, and secondary reheater is low
First economizer is set below temperature section, and first stack base sets the first temperature-adjusting baffle；
Second flue, which is set, sets the second economizer below low temperature superheater, the low temperature superheater, second stack base is set
Put the second temperature-adjusting baffle；
3rd economizer is set between the single reheat device low-temperature zone and secondary reheater low-temperature zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720118510.8U CN206439801U (en) | 2017-02-09 | 2017-02-09 | Double reheat boiler tail twin flue structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720118510.8U CN206439801U (en) | 2017-02-09 | 2017-02-09 | Double reheat boiler tail twin flue structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206439801U true CN206439801U (en) | 2017-08-25 |
Family
ID=59634414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720118510.8U Active CN206439801U (en) | 2017-02-09 | 2017-02-09 | Double reheat boiler tail twin flue structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206439801U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542076A (en) * | 2019-07-30 | 2019-12-06 | 东方电气集团东方锅炉股份有限公司 | Steam extraction modification method, structure and control method of flue gas baffle-based temperature-regulating boiler |
-
2017
- 2017-02-09 CN CN201720118510.8U patent/CN206439801U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542076A (en) * | 2019-07-30 | 2019-12-06 | 东方电气集团东方锅炉股份有限公司 | Steam extraction modification method, structure and control method of flue gas baffle-based temperature-regulating boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202032544U (en) | Invert pulverized-coal fired boiler arrangement structure for ultrahigh steam temperature steam parameter | |
| CN101261002B (en) | Improvement method of super or super supercritical coal fired power generation heat system | |
| CN102147105A (en) | Arrangement structure of inverted pulverized-coal fired boiler suitable for ultra-high steam temperature steam parameters | |
| CN107270274B (en) | Novel starting mode of ultra-supercritical coal-fired unit realizes unit full-load denitration input | |
| CN102128443A (en) | Pulverized coal boiler suitable for ultrahigh steam temperature | |
| CN104676573B (en) | A kind of 720 DEG C of efficient ultra supercritical double reheat station boilers | |
| CN103363516B (en) | A kind of CFBB with double reheat | |
| TW201533392A (en) | Superheated steam boiler of horizontal circulating fluidizing bed | |
| CN201954519U (en) | Pulverized-coal fired boiler applicable to ultrahigh steam temperature | |
| CN107101187B (en) | Heating system and heating method for supercritical carbon dioxide boiler | |
| CN103486563A (en) | Supercritical once-through boiler capable of firing eastern Junggar coal | |
| CN103574589A (en) | Tube wall overtemperature control method for platen superheater in 1045-megawatt ultra supercritical boiler | |
| CN206439801U (en) | Double reheat boiler tail twin flue structure | |
| CN201697098U (en) | Outlet smoke temperature adjusting system for waste heat boiler | |
| CN208998043U (en) | It is a kind of to use supercritical CO2For the new test boiler of working medium | |
| CN114909193B (en) | Thermal power generating unit flexible operation system based on fused salt heat storage | |
| CN208204952U (en) | The tower type solar photo-thermal steam generating system adjusted using sloppy heat salt | |
| CN203431837U (en) | Circulating fluidized bed boiler with secondary reheat function | |
| CN207247250U (en) | Coal-fired supercritical carbon dioxide power generation flue gas can be with working medium energy sub-prime classified utilization system | |
| CN110360538A (en) | A kind of vapor (steam) temperature control method of double reheat boiler during varying duty | |
| CN206207454U (en) | A kind of mechanism for wind-warm syndrome of raising boiler milling system | |
| CN205878138U (en) | Wide turndown ratio's of high reheat steam temperature 1000MW ultra supercritical double reheat boiler | |
| CN110006027B (en) | Boiler ceiling and rear vertical shaft film wall working medium flow arrangement structure and control method thereof | |
| CN111765775A (en) | Adjustable step waste heat recovery system of cement kiln head | |
| CN108826347A (en) | A kind of back-end ductwork arragement construction of double reheat boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |