US20140013746A1 - Coal-fired power generating system and coal-fired power generating method - Google Patents

Coal-fired power generating system and coal-fired power generating method Download PDF

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Publication number
US20140013746A1
US20140013746A1 US14/005,691 US201214005691A US2014013746A1 US 20140013746 A1 US20140013746 A1 US 20140013746A1 US 201214005691 A US201214005691 A US 201214005691A US 2014013746 A1 US2014013746 A1 US 2014013746A1
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United States
Prior art keywords
steam
coal
heat
heat recovery
boiler
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.)
Abandoned
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US14/005,691
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English (en)
Inventor
Toshiyuki Kimura
Takayuki Noguchi
Masaki Kataoka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsukishima Kikai Co Ltd
Original Assignee
Tsukishima Kikai Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tsukishima Kikai Co Ltd filed Critical Tsukishima Kikai Co Ltd
Assigned to TSUKISHIMA KIKAI CO., LTD. reassignment TSUKISHIMA KIKAI CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KATAOKA, MASAKI, KIMURA, TOSHIYUKI, NOGUCHI, TAKAYUKI
Publication of US20140013746A1 publication Critical patent/US20140013746A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • 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
    • F01K19/00—Regenerating or otherwise treating steam exhausted from steam engine plant
    • 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
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
    • F23K1/04—Heating fuel prior to delivery to combustion apparatus

Definitions

  • the amount of steam flowing at the final stage of the steam turbine may be reduced significantly in comparison with a design value in some cases.
  • Such a significant reduction in the amount of steam may lead to a reduction in turbine efficiency, serving as an impediment to a sufficient improvement in efficiency of the power generation expected through the predrying of the coal.
  • the coal-fired power generating system being configured to heat boiler supply water for the coal-fired boiler with extracted steam extracted from the steam turbine,
  • the wet scrubber which is a circulating water—condensate—liquid type heat exchanger, provides significantly higher efficiency of the heat recovery in comparison. Furthermore, the wet scrubber also offers ease of control over the amount of circulating water thereof, and hence, it facilitates forming a heat recovery quantity adjusting unit.
  • the temperature of the dry exhaust gas at an outlet of a first-stage scrubber is cooled to approximately 65° C.
  • the sensible heat and the latent heat of condensation of the dry exhaust gas are transferred to circulating water of the first-stage scrubber.
  • Heat exchanging is performed between the circulating water of the first-stage scrubber and the condensate to heat the condensate.
  • the condensate has a temperature equal to or lower than that of the dry exhaust gas.
  • FIG. 1 is a partially cutout perspective view of a steam tube dryer applied to a first embodiment according to the present invention.
  • a driven gear 40 is provided on a circumference of the rotating shell 30 to be in mesh with a driving gear 43 , so that the torque of a motor 41 transmitted through a speed reducer 42 causes the driven gear 40 to rotate about the shaft center of the rotating shell 30 .
  • a carrier gas CG is introduced through a carrier gas inlet nozzle 61 into the rotating shell 30 .
  • the carrier gas CG entrains steam formed by the vaporization of the water contained in the coal or the organic material, which is the material to be processed, and is discharged through a carrier gas outlet nozzle 62 as a dry exhaust gas DEG.
  • extracted steam of a first steam turbine 6 which will be described hereinafter, is used as a heat source to allow the steam tube dryer 1 to perform the preliminary drying of the coal WC and obtain the dried coal DC.
  • Another flow extracted from the low-pressure steam turbine 8 of the first steam turbine 6 namely the extracted steam S 7 , is used as the heat source for the steam tube dryer 1 .
  • the extracted steam 37 is also fed to a second steam turbine 9 , which is a low-pressure steam turbine, to allow a power generator 9 A associated with the second steam turbine 9 to generate electric power.
  • flows of extracted steam S 8 and S 9 which are part of extracted steam from the second steam turbine 9 , are merged with the drain D discharged by the steam tube dryer 1 to be supplied to the water supply pipeline 12 .
  • the flows of the extracted steam S 8 and S 9 are supplied directly to the water supply pipeline 12 to similarly heat the boiler supply water D 2 .
  • the coal-fired power generating system uses the latent heat of condensation of the extracted steam S 7 from the steam turbine 6 as a heat source for the steam tube dryer 1 to predry the coal WC
  • the system allows recovery of the latent heat of condensation and the like from the dry exhaust gas DEG discharged from the steam tube dryer 1 .
  • the present embodiment can reduce coal consumption and CO 2 emissions per unit amount of power generation, and hence, allows a coal-fired power generating system, such as a coal-fired power plant, to generate power more efficiently.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Drying Of Solid Materials (AREA)
US14/005,691 2011-03-25 2012-02-27 Coal-fired power generating system and coal-fired power generating method Abandoned US20140013746A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2011067437A JP5535112B2 (ja) 2011-03-25 2011-03-25 石炭火力発電設備及び石炭火力発電方法
JP2011-067437 2011-03-25
PCT/JP2012/054761 WO2012132700A1 (ja) 2011-03-25 2012-02-27 石炭火力発電設備及び石炭火力発電方法

Publications (1)

Publication Number Publication Date
US20140013746A1 true US20140013746A1 (en) 2014-01-16

Family

ID=46930456

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/005,691 Abandoned US20140013746A1 (en) 2011-03-25 2012-02-27 Coal-fired power generating system and coal-fired power generating method

Country Status (6)

Country Link
US (1) US20140013746A1 (zh)
JP (1) JP5535112B2 (zh)
KR (1) KR101879471B1 (zh)
AU (1) AU2012235025B2 (zh)
TW (1) TWI544183B (zh)
WO (1) WO2012132700A1 (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104197360A (zh) * 2014-09-16 2014-12-10 上海理工大学 带有乏气水回收的炉烟干燥闭式制粉燃煤锅炉机组
DE102015101921A1 (de) 2014-12-12 2016-06-16 Taiwan Carbon Nanotube Technology Corporation Verfahren zum Herstellen einer Metallelektrode mit Hilfe von Salzwasser und zum Erzeugen von elektrischem Strom mit einer solchen Metallelektrode
CN107559059A (zh) * 2017-09-29 2018-01-09 西安热工研究院有限公司 一种利用汽轮机低压级抽汽加热原煤发电系统
CN113268887A (zh) * 2021-06-22 2021-08-17 西安热工研究院有限公司 一种煤电机组锅炉暖风器最佳热源确定系统及方法
CN114046495A (zh) * 2021-11-16 2022-02-15 国网青海省电力公司 火电机组灵活性改造辅助蒸汽汽源装置

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6162468B2 (ja) * 2013-04-26 2017-07-12 三菱日立パワーシステムズ株式会社 石炭ガス化システム及び石炭ガス化発電システム
JP2015055375A (ja) * 2013-09-10 2015-03-23 周南バルクターミナル株式会社 発電方法
JP6088056B2 (ja) * 2014-06-30 2017-03-01 ＡｖａｎＳｔｒａｔｅ株式会社 ガラス基板の製造方法、ガラス基板、及びガラス基板積層体
JP6364266B2 (ja) * 2014-07-11 2018-07-25 株式会社トクヤマ 石炭の輸送方法
CN104373947B (zh) * 2014-11-13 2016-05-25 上海理工大学 过热蒸汽干燥制粉型燃煤发电系统
CN104373951B (zh) * 2014-11-13 2016-06-08 上海理工大学 过热蒸汽干燥制粉型燃煤发电系统
GB201509651D0 (en) * 2015-06-03 2015-07-15 Castle Europ Ltd Turbine system and method
CN107023813B (zh) * 2017-04-27 2019-11-19 江苏科技大学 一种非蒸汽低温余热回收系统
CN109882250A (zh) * 2019-02-27 2019-06-14 张国安 一种火电厂乏汽余热再生发电系统及其实现方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4291539A (en) * 1978-02-10 1981-09-29 Monash University Power generation system
US20060010712A1 (en) * 2004-07-19 2006-01-19 Earthrenew Organics Ltd. Process and apparatus for manufacture of fertilizer products from manure and sewage
US20100281878A1 (en) * 2007-06-13 2010-11-11 Wormser Energy Solutions, Inc. Mild gasification combined-cycle powerplant

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56119416A (en) * 1980-02-25 1981-09-19 Tsukishima Kikai Co Ltd Sludge drying and incinerating appatatus
JPS6422997A (en) * 1987-07-16 1989-01-25 Kawasaki Heavy Ind Ltd Drying and crushing of solid fuel
JPH0759709B2 (ja) * 1987-09-03 1995-06-28 三井鉱山株式会社 石炭の調湿方法
JPH08296835A (ja) * 1995-04-27 1996-11-12 Hitachi Ltd 微粉炭焚火力発電システム
JP4153448B2 (ja) * 2004-02-26 2008-09-24 株式会社神戸製鋼所 低品位炭を燃料とする発電方法
JP5461100B2 (ja) * 2009-02-27 2014-04-02 三菱重工業株式会社 低品位炭を燃料とする火力発電プラント

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4291539A (en) * 1978-02-10 1981-09-29 Monash University Power generation system
US20060010712A1 (en) * 2004-07-19 2006-01-19 Earthrenew Organics Ltd. Process and apparatus for manufacture of fertilizer products from manure and sewage
US20100281878A1 (en) * 2007-06-13 2010-11-11 Wormser Energy Solutions, Inc. Mild gasification combined-cycle powerplant

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104197360A (zh) * 2014-09-16 2014-12-10 上海理工大学 带有乏气水回收的炉烟干燥闭式制粉燃煤锅炉机组
DE102015101921A1 (de) 2014-12-12 2016-06-16 Taiwan Carbon Nanotube Technology Corporation Verfahren zum Herstellen einer Metallelektrode mit Hilfe von Salzwasser und zum Erzeugen von elektrischem Strom mit einer solchen Metallelektrode
US9496564B2 (en) 2014-12-12 2016-11-15 Taiwan Carbon Nano Technology Corporation Method for fabricating metal electrode from seawater and generating electric power with metal electrode
CN107559059A (zh) * 2017-09-29 2018-01-09 西安热工研究院有限公司 一种利用汽轮机低压级抽汽加热原煤发电系统
CN113268887A (zh) * 2021-06-22 2021-08-17 西安热工研究院有限公司 一种煤电机组锅炉暖风器最佳热源确定系统及方法
CN114046495A (zh) * 2021-11-16 2022-02-15 国网青海省电力公司 火电机组灵活性改造辅助蒸汽汽源装置

Also Published As

Publication number Publication date
TWI544183B (zh) 2016-08-01
JP2012202607A (ja) 2012-10-22
KR101879471B1 (ko) 2018-07-18
AU2012235025B2 (en) 2016-05-26
WO2012132700A1 (ja) 2012-10-04
JP5535112B2 (ja) 2014-07-02
TW201319474A (zh) 2013-05-16
KR20140002743A (ko) 2014-01-08
AU2012235025A1 (en) 2013-10-10

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Legal Events

Date Code Title Description
AS Assignment

Owner name: TSUKISHIMA KIKAI CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIMURA, TOSHIYUKI;NOGUCHI, TAKAYUKI;KATAOKA, MASAKI;REEL/FRAME:031346/0845

Effective date: 20130919

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION