CN108442984A - A kind of micro- thermal process again of steam turbine and implementation system - Google Patents
A kind of micro- thermal process again of steam turbine and implementation system Download PDFInfo
- Publication number
- CN108442984A CN108442984A CN201810183506.9A CN201810183506A CN108442984A CN 108442984 A CN108442984 A CN 108442984A CN 201810183506 A CN201810183506 A CN 201810183506A CN 108442984 A CN108442984 A CN 108442984A
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- China
- Prior art keywords
- micro
- steam turbine
- reheating
- steam
- intermediate medium
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/10—Heating, e.g. warming-up before starting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a kind of micro- thermal process again of steam turbine and implement system, including turbine body (1), boiler (4) and micro- reheating intermediate medium pipe-line system (5)；Wherein, turbine body (1) uses the hollow heat exchange stator blade (2) of steam turbine, the hollow heat exchange stator blade (2) of steam turbine forms circulation loop with boiler (4) by micro- reheating intermediate medium pipe-line system (5), and is provided with reheat vapor cycle compressor mechanical (3) on micro- reheating intermediate medium pipe-line system (5).The heat source that the present invention generates boiler introduces hollow stationary blade of steam turbine, during steam is through-flow by stator blade, heats through-flow steam, realizes steam micro- reheating in steam turbine stator blade, the thermal procession done work in movable vane.The present invention can increase thermal power generation reheating series, be conducive to improve thermal power generation rankine cycle whole efficiency by implementing micro- reheating thermal procession.
Description
Technical field
The invention belongs to station boiler and turbine system technical fields, and in particular to a kind of micro- reheating process of steam turbine is real
Apply system.
Background technology
As China increases the requirement to improving energy utilization rate and to reducing disposal of pollutants, Thermal generation unit is improved
Efficiency become one of most important one approach, and in the method for be improved Thermal generation unit efficiency, improve firepower
Power generating thermodynamic cycle is undoubtedly maximally efficient one of method.
Thermal power generation thermodynamic cycle at present is entirely the rankine cycle with reheating once or twice.Increase reheat vapor cycle
Number is of great significance for improving rankine cycle efficiency.Increase fired power generating unit reheating number, needs to fully take into account vapour pressure
The problems such as matching, temperature parameter matching, generally require to further increase steam initial conditions, and changing with steam initial conditions
Become, difficulty, difficulty of construction and the operational reliability of relevant device manufacture greatly increase.It is limited to the technical difficulty and fortune of specific implementation
Row reliability, for a long time, fired power generating unit reheating number can not increase always.
The micro- thermal process again for implementing through-flow steam in turbine body with intermediate medium, can be effectively increased through-flow steam
Reheating number, further increase rankine cycle whole efficiency.Being conducive to steam parameter during avoiding general reheating simultaneously needs
It improves and relevant device matches the problems such as difficult.
Invention content
The purpose of the present invention is to provide one kind can effectively improve thermal power generation unit reheating number, has huge energy saving
The micro- reheating implementation Process system of steam turbine of potentiality.
The present invention adopts the following technical scheme that realize：
A kind of micro- thermal process again of steam turbine and implementation system, including turbine body, boiler and micro- reheating intermediate medium pipe
Road system；Wherein,
Turbine body uses the hollow heat exchange stator blade of steam turbine, the hollow heat exchange stator blade of steam turbine to pass through in micro- reheating with boiler
Between medium pipeline system form circulation loop, and be provided with reheat vapor cycle compressor mechanical in micro- reheating intermediate medium pipe-line system.
The present invention, which further improves, to be, the hollow heat exchange stator blade of steam turbine, which is inside, has circulation intermediate medium tube bank
The stator blade of intermediate pressure cylinder and low pressure (LP) cylinder.
The present invention, which further improves, to be, micro- reheating intermediate medium is CO2Or air.
The present invention, which further improves, to be, micro- reheating intermediate medium heating surface is also had additional in boiler.
The present invention, which further improves, to be, when work, reheat vapor cycle compressor mechanical heated in the boiler intermediate will be situated between
Matter is sent in the hollow heat exchange stator blade of steam turbine after the heating through-flow steam of steam turbine, then is sent boiler back to and continued to be heated, and is completed back
The cycle of hot intermediate medium.
The present invention has following beneficial technique effect：
In the micro- reheating implementation Process system of steam turbine provided by the invention, turbine body uses hollow heat exchange stator blade.
Heated intermediate medium is introduced in the blade interior, this stator blade is equivalent to a heat exchanger, enters steam turbine for heating
Through-flow steam, realize that the through-flow steam of steam turbine carries out the process of repeatedly micro- reheating by multistage stator blade.Intermediate medium is in boiler
After obtaining heat, after reheat vapor cycle compressor mechanical is sent into the through-flow steam of the hollow heat exchange stator blade heating of steam turbine, it is re-fed into
Boiler continues to heat, and completes the cycle of backheat intermediate medium.
In short, the present invention has the advantages that following a few places：
1, it can be effectively increased rankine cycle reheating number, inherently improve rankine cycle thermodynamic efficiency.
2, be conducive to avoid steam parameters matching during general reheating, the problems such as lectotype selection and enforcement difficulty are big.
Description of the drawings
Fig. 1 is a kind of micro- thermal process again of steam turbine of the present invention and implements system schematic.
In figure：1, turbine body, 2, the hollow heat exchange stator blade of steam turbine, 3, reheat vapor cycle compressor mechanical, 4, boiler, 5, micro-
Reheating intermediate medium pipe-line system.
Specific implementation mode
The preferred implementation example of the present invention is illustrated below in conjunction with the accompanying drawings, it should be understood that described herein preferred
Implement example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
A kind of micro- thermal process again of steam turbine provided by the invention and implement system, including turbine body 1, boiler 4 and micro-
Reheating intermediate medium pipe-line system 5；Wherein, turbine body 1 uses the hollow heat exchange stator blade 2 of steam turbine, the hollow heat exchange of steam turbine
Stator blade 2 forms circulation loop, and micro- reheating intermediate medium pipe-line system 5 with boiler 4 by micro- reheating intermediate medium pipe-line system 5
On be provided with reheat vapor cycle compressor mechanical 3.Increase micro- reheating intermediate medium heating surface in boiler 4, when intermediate medium flow field is changed through this
When hot face, can all it be heated.
Embodiment
Set initial steam pressure 3.05MPa, 535 DEG C of temperature, flow 394.8t/h.As shown in Figure 1, micro- reheating intermediate medium is
CO2Or other big specific heat capacity media.Micro- reheating intermediate medium hereinafter is only with CO2For illustrate, CO2Specific heat capacity phase
To larger, and it is cheap, easily take, property stabilization.
When work, CO2Medium temperature after boiler 4 is heated reaches 535 DEG C, and vapour is sent by reheat vapor cycle compressor mechanical 3
It is logical in heating turbine body 1 in the 3rd level (two-stage does not do hollow stationary blade transformation before steam turbine) of the hollow heat exchange stator blade 2 of turbine
It flows steam and then is sent into 4 backheat of boiler.The through-flow steam of steam turbine enter it is hollow heat exchange stator blade 2 3rd level before pressure be
2.488MPa, temperature is 503.1 DEG C, and through later, pressure is constant, temperature is 508.1 DEG C (micro- reheating temperature rises 5 DEG C), and steam passes through
Pressure after 3rd level movable vane is 2.231MPa, and 490.6 DEG C of temperature, consistent when whole grade pressure drop is with no low-grade fever system is 0.257MPa,
The grade power of the third level is 3946.1kW (the grade power of no micro- reheat system is 3918.8kW), and power increases 27.3kW；Vapour
Turbine is through-flow, and steam is often i.e. primary by heating by the hollow heat exchange stator blade 2 of first turbine, realizes multiple, micro- thermal process again, vapour
Turbine is through-flow, and the total caloric receptivity of steam increases 11824kW, it is assumed that electromechanical efficiency 98.5%, boiler efficiency 92.5%, then
Heat consumption reduces 160kJ/ (kWh), and coal consumption for power generation reduces 5.959g/ (kWh).The steam of each through-flow grade without micro- reheat system
Parameter is shown in Table 1, and the steam parameter for adding each through-flow grade of micro- reheat system is shown in Table 2, adds the forward and backward energy consumption comparison of micro- reheat system
It is shown in Table 3.
Increase CO in boiler 42Medium heating surface.Add CO2Medium circulation pipeline system introduces the hollow heat exchange of steam turbine
In stator blade 2.In CO2Reheat vapor cycle compressor mechanical 3 is added in medium circulation pipeline system, to complete CO2Medium circulation process.It is right
The intermediate pressure cylinder of turbine body 1 and the stator blade of low pressure (LP) cylinder are transformed, and are made its internal tube bank with circulation intermediate medium, are referred to as
For the hollow heat exchange stator blade of steam turbine 2.
The steam parameter of each through-flow grade of the table 1 without micro- reheat system
Table 2 adds the steam parameter of each through-flow grade of micro- reheat system
Table 3 adds the forward and backward energy consumption comparison of micro- reheat system
Claims (5)
1. a kind of micro- thermal process again of steam turbine and implementing system, which is characterized in that including turbine body (1), boiler (4) and micro-
Reheating intermediate medium pipe-line system (5)；Wherein,
Turbine body (1) uses the hollow heat exchange stator blade (2) of steam turbine, the hollow heat exchange stator blade (2) of steam turbine to pass through with boiler (4)
Micro- reheating intermediate medium pipe-line system (5) forms circulation loop, and is provided with reheating on micro- reheating intermediate medium pipe-line system (5)
Recycle compressor tool (3).
2. a kind of micro- thermal process again of steam turbine according to claim 1 and implementing system, which is characterized in that steam turbine is hollow
The stator blade (2) that exchanges heat is the stator blade of the internal intermediate pressure cylinder and low pressure (LP) cylinder with circulation intermediate medium tube bank.
3. a kind of micro- thermal process again of steam turbine according to claim 1 and implementing system, which is characterized in that among micro- reheating
Medium is CO2Or air.
4. a kind of micro- thermal process again of steam turbine according to claim 1 and implementing system, which is characterized in that in boiler (4)
Also have additional micro- reheating intermediate medium heating surface.
5. a kind of micro- thermal process again of steam turbine according to claim 1 and implementing system, which is characterized in that when work, then
The intermediate medium being heated in boiler (4) is sent in the hollow heat exchange stator blade (2) of steam turbine by thermal cycle compressor mechanical (3) to be added
It after Hot gas turbine is through-flow steam, then sends boiler (4) back to and continues to be heated, complete the cycle of backheat intermediate medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810183506.9A CN108442984A (en) | 2018-03-06 | 2018-03-06 | A kind of micro- thermal process again of steam turbine and implementation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810183506.9A CN108442984A (en) | 2018-03-06 | 2018-03-06 | A kind of micro- thermal process again of steam turbine and implementation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108442984A true CN108442984A (en) | 2018-08-24 |
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ID=63193756
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810183506.9A Pending CN108442984A (en) | 2018-03-06 | 2018-03-06 | A kind of micro- thermal process again of steam turbine and implementation system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3504495A (en) * | 1966-11-04 | 1970-04-07 | Transelektro Magyar Villamossa | Multiple reheating apparatus for steam turbines |
| JPH11315800A (en) * | 1998-04-30 | 1999-11-16 | Toshiba Corp | Air compressor |
| CN106918030A (en) * | 2017-01-11 | 2017-07-04 | 华北电力大学 | A kind of coal-saving high temperature tower-type solar thermal complementation coal fired power plant integrated system |
| CN107023317A (en) * | 2017-05-25 | 2017-08-08 | 华能国际电力股份有限公司 | A kind of reheat-type multistage axial turbine and its method of work |
| CN207960696U (en) * | 2018-03-06 | 2018-10-12 | 西安热工研究院有限公司 | A kind of micro- thermal process again of steam turbine and implementation system |
-
2018
- 2018-03-06 CN CN201810183506.9A patent/CN108442984A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3504495A (en) * | 1966-11-04 | 1970-04-07 | Transelektro Magyar Villamossa | Multiple reheating apparatus for steam turbines |
| JPH11315800A (en) * | 1998-04-30 | 1999-11-16 | Toshiba Corp | Air compressor |
| CN106918030A (en) * | 2017-01-11 | 2017-07-04 | 华北电力大学 | A kind of coal-saving high temperature tower-type solar thermal complementation coal fired power plant integrated system |
| CN107023317A (en) * | 2017-05-25 | 2017-08-08 | 华能国际电力股份有限公司 | A kind of reheat-type multistage axial turbine and its method of work |
| CN207960696U (en) * | 2018-03-06 | 2018-10-12 | 西安热工研究院有限公司 | A kind of micro- thermal process again of steam turbine and implementation system |
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