CN108590787A - Supercritical generating sets steam extraction heat regenerative system with steam condenser - Google Patents
Supercritical generating sets steam extraction heat regenerative system with steam condenser Download PDFInfo
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- CN108590787A CN108590787A CN201810715368.4A CN201810715368A CN108590787A CN 108590787 A CN108590787 A CN 108590787A CN 201810715368 A CN201810715368 A CN 201810715368A CN 108590787 A CN108590787 A CN 108590787A
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- steam extraction
- adjustment steam
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- 238000000605 extraction Methods 0.000 title claims abstract description 152
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 22
- 238000001816 cooling Methods 0.000 claims description 14
- 230000002209 hydrophobic effect Effects 0.000 claims description 9
- 238000009833 condensation Methods 0.000 claims description 8
- 230000005494 condensation Effects 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 4
- 229910000679 solder Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 230000002427 irreversible effect Effects 0.000 abstract description 4
- 239000003245 coal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/44—Use of steam for feed-water heating and another purpose
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/006—Auxiliaries or details not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
Abstract
The supercritical generating sets steam extraction heat regenerative system with steam condenser that the invention discloses a kind of, including eight non-adjustment steam extractions, the inside of eight non-adjustment steam extractions are sequentially installed with the non-adjustment steam extraction of level-one, the non-adjustment steam extraction of two level, the non-adjustment steam extraction of three-level, the non-adjustment steam extraction of level Four, the non-adjustment steam extraction of Pyatyi, six grades of non-adjustment steam extractions, seven grades of non-adjustment steam extractions and eight grades of non-adjustment steam extractions from left to right, and the non-adjustment steam extraction of the level-one, the non-adjustment steam extraction of two level and the non-adjustment steam extraction of three-level are connected with alone high-pressure heater.The present invention in the corresponding high-pressure heater of the non-adjustment steam extraction of three-level by installing externally arranged steam cooler, using the water supply of the non-adjustment steam extraction of level-one corresponding high-pressure heater outlet come reduce the corresponding high-pressure heater of the non-adjustment steam extraction of three-level into the vapour degree of superheat, reduce heat transfer temperature difference, irreversible heat exchange loss is reduced, the heat-economy of unit is made to improve.
Description
Technical field
It is specifically a kind of to be cooled down with steam the present invention relates to 350MW supercritical generating sets steam extraction heat regenerative systems field
The supercritical generating sets steam extraction heat regenerative system of device.
Background technology
Feed-water heater is using steam turbine intermediate extraction come the steam-water heat exchanging Unit of heating boiler feed water, also known as backheat
Heater, feed-water heater include Gao ﹑ low-pressure heaters and oxygen-eliminating device, the water lateral pressure between condenser and oxygen-eliminating device compared with
Low is low-pressure heater, and the higher water lateral pressure after feed pump is high-pressure heater, and feed-water heater is passed by carbonated drink
Hot mode can be divided into surface-type and two kinds hybrid, and low-pressure heater mostly uses surface-type, and high-pressure heater is all made of surface-type,
Surface heater is divided into two kinds of incense coil tubular type and U-tube formula by structure type, and U-tube formula is according to water inlet position and arrangement
It is divided into vertical and horizontal, is divided into as just vertical and two kinds of side-stand type according to water inlet pipe position, for the item constant in extraction pressure
The leaving water temperature that heater is improved under part is equipped with superheated steam cooling section and hydrophobic in the heater of large capacity resuperheat unit
Cooling section, by using in 350MW supercritical generating sets steam extraction heat regenerative systems.
But the 350MW supercritical generating sets steam extraction heat regenerative system heat transfer temperature differences of existing exemplary configurations are higher, cause
Irreversible heat exchange loss is excessive, and the heat regenerative system thermal efficiency is relatively low, to keep the heat-economy of unit relatively low, while actually answering
It is larger with middle net coal consumption rate.
Invention content
The supercritical generating sets steam extraction heat regenerative system with steam condenser that the purpose of the present invention is to provide a kind of, with
Solve the problems mentioned above in the background art.
To achieve the above object, the present invention provides the following technical solutions：
A kind of supercritical generating sets steam extraction heat regenerative system with steam condenser, including eight non-adjustment steam extractions, described eight
The inside of a non-adjustment steam extraction is sequentially installed with the non-adjustment steam extraction of level-one, the non-adjustment steam extraction of two level, the non-adjustment of three-level from left to right
Steam extraction, the non-adjustment steam extraction of level Four, the non-adjustment steam extraction of Pyatyi, six grades of non-adjustment steam extractions, seven grades of non-adjustment steam extractions and eight grades of non-adjustment
Steam extraction, the non-adjustment steam extraction of the level-one, the non-adjustment steam extraction of two level and the non-adjustment steam extraction of three-level are connected with alone high-pressure heater,
The non-adjustment steam extraction of level Four is connected with oxygen-eliminating device, and the non-adjustment steam extraction of the Pyatyi, six grades of non-adjustment steam extractions, seven grades of non-adjustment are taken out
Vapour and eight grades of non-adjustment steam extractions are respectively to be connected with low-pressure heater, the corresponding high-pressure heater of the non-adjustment steam extraction of three-level
Side is equipped with externally arranged steam cooler.
As a further solution of the present invention：The non-adjustment steam extraction of level Four is also water supply other than for oxygen-eliminating device steam supply
Mercury vapour turbine and Auxiliary Steam steam supply.
As further scheme of the invention：The non-adjustment steam extraction of the level-one, the non-adjustment steam extraction of two level and the non-tune of three-level
The high-pressure heater that whole steam extraction is correspondingly connected with is horizontal, U-tube, double-flow structure.
As further scheme of the invention：The non-adjustment steam extraction of the level-one, the non-adjustment steam extraction of two level and the non-tune of three-level
The inside for the high-pressure heater that whole steam extraction is correspondingly connected with is made of steam cooling section, condensation section and hydrophobic cooling section.
As further scheme of the invention：The non-adjustment steam extraction of the Pyatyi, six grades of non-adjustment steam extractions, seven grades of non-adjustment
The low-pressure heater that steam extraction and eight grades of non-adjustment steam extractions are correspondingly connected with is horizontal, full solder type structure.
As further scheme of the invention：The non-adjustment steam extraction of the Pyatyi, six grades of non-adjustment steam extractions, seven grades of non-adjustment
The inside for the low-pressure heater that steam extraction and eight grades of non-adjustment steam extractions are correspondingly connected with is made of condensation section and hydrophobic cooling section.
As further scheme of the invention：What seven grades of non-adjustment steam extractions and eight grades of non-adjustment steam extractions were correspondingly connected with
Low-pressure heater is the compound heater for sharing a shell, and horizontal type structure is arranged in the throat of condenser.
As further scheme of the invention：Do not pacify inside the oxygen-eliminating device that the non-adjustment steam extraction of level Four is correspondingly connected with
Fill drain cooler.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention is right on the basis of heat regenerative system is exemplary configurations
Heat regenerative system is optimized, by installing externally arranged steam cooler in the corresponding high-pressure heater of the non-adjustment steam extraction of three-level,
Water supply using the corresponding high-pressure heater outlet of the non-adjustment steam extraction of level-one adds to reduce the corresponding high pressure of the non-adjustment steam extraction of three-level
Hot device into the vapour degree of superheat, reduce heat transfer temperature difference, reduce irreversible heat exchange and lose, make full use of steam extraction to cross heat content, by carrying
High feed temperature improves the heat regenerative system thermal efficiency, to make the heat-economy of unit improve, and can reduce in practical applications
About 0.4 gram/kilowatt hour of net coal consumption rate.
Description of the drawings
Fig. 1 is the therrmodynamic system structural schematic diagram of the present invention.
Fig. 2 is the corresponding heat balance diagram of therrmodynamic system of the present invention.
Fig. 3 is the front and back comparison diagram of present invention optimization.
Specific implementation mode
Please refer to Fig.1~3, in the embodiment of the present invention, a kind of supercritical generating sets steam extraction with steam condenser is returned
Hot systems, including eight non-adjustment steam extractions, the inside of eight non-adjustment steam extractions are sequentially installed with the non-adjustment of level-one and take out from left to right
The non-adjustment steam extraction of vapour, two level, the non-adjustment steam extraction of three-level, the non-adjustment steam extraction of level Four, the non-adjustment steam extraction of Pyatyi, six grades of non-adjustment are taken out
Vapour, seven grades of non-adjustment steam extractions and eight grades of non-adjustment steam extractions, the non-adjustment steam extraction of level-one, the non-adjustment steam extraction of two level and the non-adjustment of three-level are taken out
Vapour is connected with alone high-pressure heater, and the non-adjustment steam extraction of level-one, the non-adjustment steam extraction of two level and the non-adjustment steam extraction of three-level correspond to and connect
The high-pressure heater connect is horizontal, U-tube, double-flow structure, and internal by steam cooling section, condensation section and hydrophobic cooling
Duan Zucheng, the non-adjustment steam extraction of level Four are also feed pump turbine and Auxiliary Steam steam supply other than for oxygen-eliminating device steam supply, five
The non-adjustment steam extraction of grade, six grades of non-adjustment steam extractions, seven grades of non-adjustment steam extractions and eight grades of non-adjustment steam extractions are respectively to be connected with low pressure to add
Hot device, the non-adjustment steam extraction of Pyatyi, six grades of non-adjustment steam extractions, seven grades of non-adjustment steam extractions and eight grades of non-adjustment steam extractions are correspondingly connected with low
It is horizontal, full solder type structure to press heater, and inside is made of condensation section and hydrophobic cooling section, wherein seven grades of non-adjustment
The low-pressure heater that steam extraction and eight grades of non-adjustment steam extractions are correspondingly connected with is the compound heater for sharing a shell, horizontal type structure cloth
The throat in condenser is set, is fitted without drain cooler inside the oxygen-eliminating device that the non-adjustment steam extraction of level Four is correspondingly connected with, three-level is non-
The side of the corresponding high-pressure heater of adjustment steam extraction is equipped with externally arranged steam cooler.
The present invention operation principle be：By using the non-adjustment steam extraction of level-one, the non-adjustment steam extraction of two level and the non-adjustment of three-level
The high-pressure heater that steam extraction is correspondingly connected with is horizontal, U-tube, double-flow structure, and internal by steam cooling section, condensation section
It is formed with hydrophobic cooling section, while the non-adjustment steam extraction of level Four is other than for oxygen-eliminating device steam supply, is also feed pump turbine and auxiliary
Vapour system steam supply；And then use the non-adjustment steam extraction of Pyatyi, six grades of non-adjustment steam extractions, seven grades of non-adjustment steam extractions and eight grades of non-adjustment
The low-pressure heater that steam extraction is correspondingly connected with is horizontal, full solder type structure, and internal by condensation section and hydrophobic cooling section group
At wherein the low-pressure heater that seven grades of non-adjustment steam extractions and eight grades of non-adjustment steam extractions are correspondingly connected with is the compound of a shared shell
Heater, horizontal type structure are arranged in the throat of condenser, are fitted without inside the oxygen-eliminating device that the non-adjustment steam extraction of level Four is correspondingly connected with
Drain cooler utilizes level-one by installing externally arranged steam cooler in the corresponding high-pressure heater of the non-adjustment steam extraction of three-level
The water supply of non-adjustment steam extraction corresponding high-pressure heater outlet come reduce the corresponding high-pressure heater of the non-adjustment steam extraction of three-level into
The vapour degree of superheat reduces heat transfer temperature difference, reduces irreversible heat exchange loss, makes full use of steam extraction to cross heat content, by improving to water temperature
It spends to improve the heat regenerative system thermal efficiency, to make the heat-economy of unit improve, and net coal consumption rate can be reduced in practical applications
About 0.4 gram/kilowatt hour.
Claims (8)
1. a kind of supercritical generating sets steam extraction heat regenerative system with steam condenser, including eight non-adjustment steam extractions, special
Sign is：The inside of eight non-adjustment steam extractions is sequentially installed with the non-adjustment steam extraction of level-one from left to right, the non-adjustment of two level is taken out
The non-adjustment steam extraction of vapour, three-level, the non-adjustment steam extraction of level Four, the non-adjustment steam extraction of Pyatyi, six grades of non-adjustment steam extractions, seven grades of non-adjustment steam extractions
With eight grades of non-adjustment steam extractions, the non-adjustment steam extraction of the level-one, the non-adjustment steam extraction of two level and the non-adjustment steam extraction of three-level connect alone
There is a high-pressure heater, the non-adjustment steam extraction of level Four is connected with oxygen-eliminating device, and the non-adjustment steam extraction of the Pyatyi, six grades of non-adjustment are taken out
Vapour, seven grades of non-adjustment steam extractions and eight grades of non-adjustment steam extractions are respectively to be connected with low-pressure heater, the non-adjustment steam extraction pair of three-level
The side for the high-pressure heater answered is equipped with externally arranged steam cooler.
2. a kind of supercritical generating sets steam extraction heat regenerative system with steam condenser according to claim 1, special
Sign is：The non-adjustment steam extraction of level Four also supplies for feed pump turbine and Auxiliary Steam other than for oxygen-eliminating device steam supply
Vapour.
3. a kind of supercritical generating sets steam extraction heat regenerative system with steam condenser according to claim 1, special
Sign is：The non-high-pressure heater for adjusting steam extraction, the non-adjustment steam extraction of two level and the non-adjustment steam extraction of three-level and being correspondingly connected with of the level-one
It is horizontal, U-tube, double-flow structure.
4. a kind of supercritical generating sets steam extraction heat regenerative system with steam condenser according to claim 1, special
Sign is：The non-high-pressure heater for adjusting steam extraction, the non-adjustment steam extraction of two level and the non-adjustment steam extraction of three-level and being correspondingly connected with of the level-one
Inside by steam cooling section, condensation section and hydrophobic cooling section form.
5. a kind of supercritical generating sets steam extraction heat regenerative system with steam condenser according to claim 1, special
Sign is：The non-adjustment steam extraction of the Pyatyi, six grades of non-adjustment steam extractions, seven grades of non-adjustment steam extractions and eight grades of non-adjustment steam extractions correspond to and connect
The low-pressure heater connect is horizontal, full solder type structure.
6. a kind of supercritical generating sets steam extraction heat regenerative system with steam condenser according to claim 1, special
Sign is：The non-adjustment steam extraction of the Pyatyi, six grades of non-adjustment steam extractions, seven grades of non-adjustment steam extractions and eight grades of non-adjustment steam extractions correspond to and connect
The inside of the low-pressure heater connect is made of condensation section and hydrophobic cooling section.
7. a kind of supercritical generating sets steam extraction heat regenerative system with steam condenser according to claim 1 or 6,
It is characterized in that：The low-pressure heater that seven grades of non-adjustment steam extractions and eight grades of non-adjustment steam extractions are correspondingly connected with is to share a shell
Compound heater, horizontal type structure is arranged in the throat of condenser.
8. a kind of supercritical generating sets steam extraction heat regenerative system with steam condenser according to claim 1, special
Sign is：It is fitted without drain cooler inside the oxygen-eliminating device that the non-adjustment steam extraction of level Four is correspondingly connected with.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810715368.4A CN108590787A (en) | 2018-06-29 | 2018-06-29 | Supercritical generating sets steam extraction heat regenerative system with steam condenser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810715368.4A CN108590787A (en) | 2018-06-29 | 2018-06-29 | Supercritical generating sets steam extraction heat regenerative system with steam condenser |
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| CN108590787A true CN108590787A (en) | 2018-09-28 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2275513C1 (en) * | 2004-12-15 | 2006-04-27 | Государственное образовательное учреждение высшего профессионального образования "Ульяновский государственный технический университет" | Thermal power station |
| CN101650022A (en) * | 2009-08-21 | 2010-02-17 | 上海电力学院 | Steam turbine interstage back-heating heater cross-class connecting system |
| CN202403258U (en) * | 2011-11-22 | 2012-08-29 | 邹治平 | Water-supply steam-extraction regenerative heating system of coal-fired power plant |
| CN202546728U (en) * | 2012-01-17 | 2012-11-21 | 浙江省电力设计院 | External tandem type steam cooler in heat regenerative system of large thermal power plant |
| CN104990061A (en) * | 2015-07-31 | 2015-10-21 | 魏熙臣 | Externally-arranged steam cooler connection system in steam turbine heat regenerative system |
| CN105863754A (en) * | 2016-04-19 | 2016-08-17 | 东南大学 | 700 DEG C ultra-supercritical secondary reheating thermodynamic system |
| CN208619183U (en) * | 2018-06-29 | 2019-03-19 | 神华国华广投（柳州）发电有限责任公司 | Supercritical generating sets steam extraction heat regenerative system with steam condenser |
-
2018
- 2018-06-29 CN CN201810715368.4A patent/CN108590787A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2275513C1 (en) * | 2004-12-15 | 2006-04-27 | Государственное образовательное учреждение высшего профессионального образования "Ульяновский государственный технический университет" | Thermal power station |
| CN101650022A (en) * | 2009-08-21 | 2010-02-17 | 上海电力学院 | Steam turbine interstage back-heating heater cross-class connecting system |
| CN202403258U (en) * | 2011-11-22 | 2012-08-29 | 邹治平 | Water-supply steam-extraction regenerative heating system of coal-fired power plant |
| CN202546728U (en) * | 2012-01-17 | 2012-11-21 | 浙江省电力设计院 | External tandem type steam cooler in heat regenerative system of large thermal power plant |
| CN104990061A (en) * | 2015-07-31 | 2015-10-21 | 魏熙臣 | Externally-arranged steam cooler connection system in steam turbine heat regenerative system |
| CN105863754A (en) * | 2016-04-19 | 2016-08-17 | 东南大学 | 700 DEG C ultra-supercritical secondary reheating thermodynamic system |
| CN208619183U (en) * | 2018-06-29 | 2019-03-19 | 神华国华广投（柳州）发电有限责任公司 | Supercritical generating sets steam extraction heat regenerative system with steam condenser |
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Application publication date: 20180928 |