Title:
COAL-FIRED POWER PLANT
Document Type and Number:
WIPO Patent Application WO/2014/013559
Kind Code:
A1
Abstract:
The objective of the present invention is to control to a constant value the respective outlet steam temperatures of a main steam system, a high-pressure reheating system, and a low-pressure reheating system, in a two-stage reheating boiler wherein a primary superheater has been eliminated. To achieve this objective, the present invention is characterized by being equipped with: a boiler, equipped with a furnace having a burner that burns coal, a rear transfer surface that guide combustion gas in the furnace to an exhaust gas purification device, and a partition wall that divides the rear transfer surface into two gas flow paths; a high-pressure reheating system, which is arranged in one of the gas flow paths of the rear transfer surface, and which reheats exhaust air from an ultra-high-pressure turbine with the combustion gas in the boiler; a high-pressure turbine to which steam that has been heated by the high-pressure reheating system is supplied; a low-pressure reheating system, which is arranged in the other of the gas flow paths of the rear transfer surface, and which reheats exhaust air from the high-pressure turbine with the combustion gas in the boiler; a gas distribution damper capable of controlling the distribution of the flow volume of the gas flowing in the two gas flow paths of the rear transfer surface; and an exhaust gas recirculation fan that recirculates to the furnace the exhaust gas discharged from the boiler.
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Inventors:
HAYASHI YOSHIHARU (JP)
SHIBATA TSUYOSHI (JP)
HANDA MASATO (JP)
SHIBATA TSUYOSHI (JP)
HANDA MASATO (JP)
Application Number:
PCT/JP2012/068141
Publication Date:
January 23, 2014
Filing Date:
July 18, 2012
Export Citation:
Assignee:
HITACHI LTD (JP)
HAYASHI YOSHIHARU (JP)
SHIBATA TSUYOSHI (JP)
HANDA MASATO (JP)
HAYASHI YOSHIHARU (JP)
SHIBATA TSUYOSHI (JP)
HANDA MASATO (JP)
International Classes:
F01K11/00; F01K13/00; F23C9/00; F23J15/00; F23L15/04
Foreign References:
| JP2012092732A | 2012-05-17 | |||
| JP2011102540A | 2011-05-26 | |||
| JP2010249050A | 2010-11-04 | |||
| JP2012093002A | 2012-05-17 | |||
| JPH05157213A | 1993-06-22 | |||
| JPH07243611A | 1995-09-19 | |||
| JPH0452407A | 1992-02-20 | |||
| JP2006132811A | 2006-05-25 |
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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