Hitachi, Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

Nobuyoshi Mishima

Naoyuki Nagafuchi

Takashi Sugiura

Tetsuya Kosaka

Yoshiki Noguchi

Toshio Katsube

Hisayuki Orita

Jun Shimamura

Yasushi Takeda

Kouichi Yokoyama

Hirotsugu Fukuhara

Kishu Hosoi

Yoshihiro Kidera

Toshiyuki Osada

Toshihiko Sakakura

Osamu Matsuura

A solar thermal power generation system includes a solar heat collection system that generates superheated steam by solar heat, a main power generation system that performs power generation by part of the superheated steam generated by the solar heat collection system, a solar heat storage/release system that stores heat in a heat storage medium or releases the heat stored in the heat storage medium, and a secondary power generation system that performs power generation by saturated steam generated by the heat storage or the heat release in the solar heat storage/release system. The solar heat storage/release system includes a heat storage heater for exchanging heat between the rest of the superheated steam generated by the solar heat collection system and the heat storage medium to store heat in the heat storage medium and to generate saturated steam, a low-temperature tank for containing the heat storage medium to be supplied to the heat storage heater, and a high-temperature tank for containing the heat storage medium after the heat storage in the heat storage heater. The secondary power generation system includes a saturated steam turbine into which the saturated steam generated by the heat storage heater can be introduced.

Solar thermal power generation system and solar thermal power generation method

The invention provides a solar/air turbine generator system that reduces construction and power generating costs and does not require the use of fossil fuel. A solar/air turbine generator system comprises: a compressor for drawing in and compressing air; a solar receiver for heating the air compressed by the compressor with the use of solar heat collected by a solar collector; an air turbine for driving the compressor and a generator by receiving the compressed air heated by the solar receiver; a regenerative heat exchanger, located between the compressor and the solar receiver, for heating the air compressed by the compressor using the exhaust of the air turbine as a heating medium; and a distribution device, located between the compressor and the regenerative heat exchanger, for distributing the compressed air to the side of the regenerative heat exchanger and to a bypass side, the bypass side being the inlet side of the air turbine. The solar/air turbine generator system further includes a control device for maintaining the air temperature at the inlet of the air turbine at a constant value by adjusting the flow rate of the air turbine exhaust that flows into the regenerative heat exchanger as a heating medium.

Solar/air turbine generator system

The object is to simplify systems in a solar thermal power generation plant and thereby provide a solar thermal power generation system achieving reduction in the construction cost and the power generation cost. The solar thermal power generation system comprises: a solar heat collection device which collects solar heat and thereby heats up molten salt as a primary heat medium; a solar heat accumulation/radiation device including a low-temperature tank which stores molten salt to be supplied to the solar heat collection device, a high-temperature tank which stores high-temperature molten salt heated by the solar heat collection device, and a secondary heat medium heater which heats up a secondary heat medium by using the high-temperature molten salt supplied from the high-temperature tank as a heating medium; and a compressor/high-temperature turbine power generation device including a compressor which generates compressed air as the secondary heat medium by compressing air taken in from the atmosphere to a prescribed pressure and a high-temperature air turbine which drives a generator by taking in the compressed air heated by the secondary heat medium heater.

Solar thermal power generation system

A combustion exhaust gas treatment system comprising: a heat exchanger (A) for recovering heat contained in the combustion exhaust gas into heat medium, an absorption column for obtaining COremoved gas by absorbing COin the combustion exhaust gas into absorbent, a heat exchanger (B) for applying heat recovered by heat medium to the COabsorbed absorbent, a desorption column for desorbing the absorbent by removing COfrom the COabsorbed absorbent, a flash tank for flash vaporizing the desorbed absorbent and a heat exchanger (E) for transferring heat from the desorbed absorbent to the COabsorbed absorbent, wherein the COabsorbed absorbent can be supplied from the absorption column to the desorption column via the heat exchanger (E) and the heat exchanger (B) in this order, and the desorbed absorbent can be supplied from the desorption column to the absorption column via the flash tank and the heat exchanger (E) in this order.

Combustion exhaust gas treatment system and method of treating combustion exhaust gas

A thermal power plant includes a boiler for burning fossil fuel to generate steam, a steam turbine including a high-pressure turbine, an intermediate-pressure turbine, and a low-pressure turbine which are driven by steam generated in the boiler, an absorber for absorbing and capturing COcontained in boiler exhaust gas discharged from the boiler in an absorbing liquid, a desorber for circulating the absorbing liquid between the desorber and the absorber and separating COfrom the absorbing liquid that has absorbed CO, a reboiler for feeding a heating source for separating COfrom the absorbing liquid to the desorber, a steam pipe system for feeding steam taken out from the high-pressure turbine and the intermediate-pressure turbine to the reboiler, and a steam feed source switching device.

Thermal power plant, steam turbine and control method for a thermal power plant

A gasification power generation system provided with a carbon dioxide separation and recovery device is disclosed. The system includes a carbon dioxide separation and recovery device having a shift reactor to convert carbon monoxide contained in fuel gas into carbon dioxide by mixing steam into the fuel gas containing carbon monoxide and hydrogen to cause a shift reaction; a carbon dioxide absorption tower to produce fuel gas from which carbon dioxide has been removed by allowing an absorption liquid to absorb carbon dioxide from the fuel gas containing carbon dioxide flowing down the shift reactor; an absorption liquid recycling device to recycle an absorption liquid by separating carbon dioxide absorbed by the absorption liquid in the carbon dioxide absorption tower; and a gasification power generation system.

Gasification power generation system provided with carbon dioxide separation and recovery device

A boiler apparatus is provided that generates a heat source capable of efficiently regenerating absorbing liquid while maintaining steam turbine efficiency to a maximum extent. The boiler apparatus includes: an economizerpreheating water serving as working fluid of a steam turbine system; an air preheaterinstalled downstream of the economizer; an evaporatorinstalled downstream of the economizer; an evaporator drumusing the water vapor from the evaporatorto generate saturated water vapor; a reboilerusing the saturated water vapor from the evaporator drumto evaporate the absorbing liquid from a regeneration tower; a steam bypass pipeconnected to a steam pipethrough which the saturated water vapor from the evaporator drumpasses; a steam escape valveinstalled in the steam bypass pipe; an exhaust gas bypass pipeconnected to an exhaust gas pipeconnecting the air preheaterwith an absorption tower; and a butterfly valveinstalled in the exhaust gas bypass pipe

Boiler apparatus

A combined cycle power plant includes a water treatment apparatus for removing iron oxides in condensate provided in a partial condensate flow line for selectively flowing a portion of the condensate into a condenser. The partial condensate flow line recirculates a portion of the condensate from and to the condenser through the condensate feed line connected to a boiler utilizing exhaust gas from a gas turbine. A heating apparatus heats the condensate to reduce the concentration of oxygen by deaeration, and a drum blow off water recovery line is connected to the boiler and to the condenser for blowing off part of the condensate in the boiler.

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Hitachi, Japan

Nobuyoshi Mishima