CN204006045U - Thermal power plant's double reheat boiler one-phase step-down in parallel blow tube construction - Google Patents
Thermal power plant's double reheat boiler one-phase step-down in parallel blow tube construction Download PDFInfo
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- CN204006045U CN204006045U CN201420410020.1U CN201420410020U CN204006045U CN 204006045 U CN204006045 U CN 204006045U CN 201420410020 U CN201420410020 U CN 201420410020U CN 204006045 U CN204006045 U CN 204006045U
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Abstract
The utility model discloses a kind of thermal power plant double reheat boiler one-phase step-down in parallel blow tube construction and comprises that superheater, single reheat device, secondary reheater, two adjustment doors and two face and blow door, wherein, superheater is provided with two-way pipeline, one road device for cleaning pipeline is crossed first and is faced to blow and connect a single reheat device, the outlet conduit of single reheat device connects exhaust apparatus by the first adjustment doors, another road device for cleaning pipeline is crossed second and is faced and blow a connecting secondary reheater, the outlet conduit of secondary reheater by second adjustment doors connect exhaust apparatus, each face to blow be provided with behind the door granulating device.The utility model is carry out research and innovation and propose for the blowpipe problem of thermal power plant's double reheat unit; can under the prerequisite that ensures blowpipe coefficient and blowpipe effect, better control superheater and double reheating actuator temperature; can protect and face the safety of blowing door equipment simultaneously; ensure that blowpipe carries out safely and effectively, blowpipe effect is up to standard.
Description
Technical field
The utility model relates to thermal power plant's double reheat boiler one-phase step-down in parallel blow tube construction.
Background technology
It is in order further to improve the thermal efficiency of unit that unit adopts the object of double reheat, and meets the requirement of the final exhaust steam moisture of unit low pressure (LP) cylinder.Ultra supercritical double reheat boiler has advance technically.There is economically good benefit, and promote preferably environmental protection characteristic, it is a kind of efficient, oligosaprobic coal fired power generation technology of maturation in the world, Ye Shi China have ready conditions most at present development an advanced generation technology, there is the very strong market competitiveness, there is vast potential for future development in China.
In the parameter area situations such as identical unit capacity, identical main steam pressure, adopt double reheat technology more can make unit heat economy be improved, its relative heat consumption rate improvement value is about 1.4%～1.6%.The steam turbine suction parameter of double reheat unit be 31.4MPa 600 620 620 DEG C, the 25.0MP generally applying with respect to current ultra supercritical unit 600 600 DEG C of parameters, the thermal efficiency of unit has improved approximately 2.4～2.6% left and right, can significantly reduce unit coal consumption, therefore adopting double reheat unit is large-capacity ultra-supercritical unit development dominant direction.
The difficult point of double reheat boiler blow piping is the control of secondary reheater inlet temperature.If adopt conventional one-phase step-down blowpipe, secondary reheater inlet temperature can only be burnt to adjust by fume side and be controlled, and the temperature control of fume side is limited, so during the coal dust blowpipe that comes into operation, secondary reheater inlet temperature probably occurs to transfinite; In conventional single reheat boiler one-phase step-down blowpipe process, the blowpipe coefficient of superheater is often on the low side, although meet national standard, blowpipe effect is not good enough, and double reheat boiler probably exists identical problem, and may be more obvious.
Utility model content
The utility model is in order to address the above problem, thermal power plant's double reheat boiler one-phase step-down in parallel blow tube construction has been proposed, superheater is exported to temporary pipeline and be divided into two-way, door is blown to single reheat device through granulating device with facing in one tunnel, door is blown to secondary reheater through granulating device and facing in another road, once and secondary reheater export pipeline reconsolidate the interim pipeline in Wei Yi road to exhaust apparatus.
To achieve these goals, the utility model adopts following technical scheme:
A kind of thermal power plant double reheat boiler one-phase step-down in parallel blow tube construction, comprising that superheater, single reheat device, secondary reheater, two adjustment doors and two face blows door, wherein, superheater is provided with two-way pipeline, one road device for cleaning pipeline is crossed first and is faced to blow and connect a single reheat device, the outlet conduit of single reheat device connects exhaust apparatus by the first adjustment doors, another road device for cleaning pipeline is crossed second and is faced and blow a connecting secondary reheater, the outlet conduit of secondary reheater by second adjustment doors connect exhaust apparatus, each face to blow be provided with behind the door granulating device.
Described first faces and blows door and second and face and blow a simultaneously unlatching, makes the steam of superheater be divided into two-way and enters single reheat device and secondary reheater.
Described first faces and blows door and second and face and blow door and be used alternatingly after superheater purges totally.
Operation principle of the present utility model is: open two first simultaneously and face and blow door, the steam of the superheater of flowing through is like this divided into two-way in superheater outlet and enters double reheating device, thereby overall resistance reduces, and has improved the blowpipe coefficient of superheater.After superheater purges totally, two can be faced and blow alternately unlatching of door, purge respectively firsts and seconds reheater, the sweeping coefficient of reheater also can be very high like this, purges effect also fine.
The beneficial effects of the utility model are:
1) temperature is easy to control: only need to control superheater outlet temperature, needn't worry overtemperature and owe warm problem;
2) can adopt conventional blowpipe pressure: if adopt series connection one-phase blowpipe mode, because increased secondary reheater, for ensureing blowpipe coefficient, will improve superheater outlet pressure, also will improve and face the withstand voltage rank of blowing door, and face, to blow the puckery fault of badge be recurrent in blowpipe process, and one-phase step-down blowpipe mode in parallel can adopt conventional blowpipe pressure, is conducive to ensure carrying out smoothly of blowpipe;
3) be conducive to improve superheater blowpipe coefficient, adopt one-phase step-down blowpipe in parallel, superheater outlet is divided into two-way, and downstream passage section increases, and is conducive to improve superheater blowpipe coefficient.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is conventional one-phase step-down blow tube construction schematic diagram.
Wherein, 1, superheater; 2, first faces and blows door; 3, single reheat device; 4, secondary reheater; 5, the first adjustment doors; 6, exhaust apparatus; 7, bypass door; 8, second faces and blows door; 9, the second adjustment doors.
Detailed description of the invention:
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
As shown in Figure 1, a kind of thermal power plant double reheat boiler one-phase step-down in parallel blow tube construction, comprise superheater 1, single reheat device 3, secondary reheater 4, two adjustment doors 5 and two face and blow door 2, wherein, superheater 1 is provided with two-way pipeline, one road device for cleaning pipeline is crossed first and is faced and blow door 2 and connect single reheat devices 3, the outlet conduit of single reheat device 3 connects exhaust apparatus 6 by the first adjustment doors 5, another road device for cleaning pipeline cross second face blow door 8 connecting secondary reheaters 4, the outlet conduit of secondary reheater 4 connects exhaust apparatus 6 by the second adjustment doors 9, after each, be provided with granulating device, face and blow a side and be provided with bypass door.
As shown in Figure 2, the difficult point of double reheat boiler blow piping is the control of secondary reheater inlet temperature.If adopt conventional one-phase step-down blowpipe, secondary reheater inlet temperature can only be burnt to adjust by fume side and be controlled, and the temperature control of fume side is limited, so during the coal dust blowpipe that comes into operation, single reheat device outlet temperature probably occurs to transfinite.
For this situation, we advise that double reheat boiler adopts one-phase step-down blowpipe in parallel: superheater outlet temporary pipeline is divided into two-way, one tunnel is faced and is blown door to single reheat device through granulating device and first, another road is faced and is blown door to secondary reheater through granulating device and second, once and secondary reheater export pipeline reconsolidate the interim pipeline in Wei Yi road to exhaust apparatus.
In actual blowpipe process, to open two first simultaneously and face and blow door, the steam of the superheater of flowing through is like this divided into two-way in superheater outlet and enters double reheating device, thus overall resistance reduces, and has improved the blowpipe coefficient of superheater.After superheater purges totally, two can be faced and blow alternately unlatching of door, purge respectively firsts and seconds reheater, the sweeping coefficient of reheater also can be very high like this, purges effect also fine.
This blowpipe mode has following some benefit:
1) temperature is easy to control.Only need to control superheater outlet temperature, needn't worry overtemperature and owe warm problem;
2) can adopt conventional blowpipe pressure, increase secondary reheater, for ensureing blowpipe coefficient, will improve superheater outlet pressure, also will improve and face the withstand voltage rank of blowing door, and face, to blow the puckery fault of badge be recurrent in blowpipe process, and one-phase step-down blowpipe mode in parallel can adopt conventional blowpipe pressure, is conducive to ensure carrying out smoothly of blowpipe.
3) be conducive to improve superheater blowpipe coefficient.In conventional single reheat boiler one-phase step-down blowpipe process, the blowpipe coefficient of superheater is often on the low side, although meet national standard, blowpipe effect is not good enough.Probably there is identical problem in double reheat boiler, and may be more obvious.Adopt one-phase step-down blowpipe in parallel, superheater outlet is divided into two-way, and downstream passage section increases, and is conducive to improve superheater blowpipe coefficient.
By reference to the accompanying drawings detailed description of the invention of the present utility model is described although above-mentioned; but the not restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendments that creative work can make or distortion still in protection domain of the present utility model.
Claims (3)
1. thermal power plant's double reheat boiler one-phase step-down in parallel blow tube construction, it is characterized in that: comprising that superheater, single reheat device, secondary reheater, two adjustment doors and two face blows door, wherein, superheater is provided with two-way pipeline, one road device for cleaning pipeline is crossed first and is faced to blow and connect a single reheat device, the outlet conduit of single reheat device connects exhaust apparatus by the first adjustment doors, another road device for cleaning pipeline is crossed second and is faced and blow a connecting secondary reheater, the outlet conduit of secondary reheater by second adjustment doors connect exhaust apparatus, each face to blow be provided with behind the door granulating device.
2. thermal power plant as claimed in claim 1 double reheat boiler one-phase step-down in parallel blow tube construction, is characterized in that: described first faces and blow door and second and face and blow a unlatching simultaneously, makes the steam of superheater be divided into two-way and enters single reheat device and secondary reheater.
3. thermal power plant as claimed in claim 1 double reheat boiler one-phase step-down in parallel blow tube construction, is characterized in that: described first faces and blow door and second and face and blow door and be used alternatingly after superheater purges totally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420410020.1U CN204006045U (en) | 2014-07-23 | 2014-07-23 | Thermal power plant's double reheat boiler one-phase step-down in parallel blow tube construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420410020.1U CN204006045U (en) | 2014-07-23 | 2014-07-23 | Thermal power plant's double reheat boiler one-phase step-down in parallel blow tube construction |
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| Publication Number | Publication Date |
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| CN204006045U true CN204006045U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420410020.1U Expired - Fee Related CN204006045U (en) | 2014-07-23 | 2014-07-23 | Thermal power plant's double reheat boiler one-phase step-down in parallel blow tube construction |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019735A (en) * | 2017-12-22 | 2018-05-11 | 山东中实易通集团有限公司 | A kind of double reheat power generation sets steam blowing out by pressure reduction system and method |
| CN108661733A (en) * | 2018-06-25 | 2018-10-16 | 西安热工研究院有限公司 | A kind of enclosed purge system and method suitable for supercritical carbon dioxide Brayton cycle |
| CN110608633A (en) * | 2019-10-15 | 2019-12-24 | 中冶南方都市环保工程技术股份有限公司 | Boiler steam oxygenation depressurization blowing pipe system and method |
| CN112325267A (en) * | 2020-10-22 | 2021-02-05 | 山东中实易通集团有限公司 | Pressure-stabilizing steam blowing pipe system and method for double reheat boiler |
-
2014
- 2014-07-23 CN CN201420410020.1U patent/CN204006045U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019735A (en) * | 2017-12-22 | 2018-05-11 | 山东中实易通集团有限公司 | A kind of double reheat power generation sets steam blowing out by pressure reduction system and method |
| CN108019735B (en) * | 2017-12-22 | 2023-08-18 | 山东中实易通集团有限公司 | Pressure-reducing steam blowpipe system and method for secondary reheating unit |
| CN108661733A (en) * | 2018-06-25 | 2018-10-16 | 西安热工研究院有限公司 | A kind of enclosed purge system and method suitable for supercritical carbon dioxide Brayton cycle |
| CN108661733B (en) * | 2018-06-25 | 2023-11-14 | 西安热工研究院有限公司 | Closed purging system and method suitable for supercritical carbon dioxide Brayton cycle |
| CN110608633A (en) * | 2019-10-15 | 2019-12-24 | 中冶南方都市环保工程技术股份有限公司 | Boiler steam oxygenation depressurization blowing pipe system and method |
| CN112325267A (en) * | 2020-10-22 | 2021-02-05 | 山东中实易通集团有限公司 | Pressure-stabilizing steam blowing pipe system and method for double reheat boiler |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20200723 |