Hitachi, Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

Tsuyoshi Shibata

Yoshiharu Hayashi

Masayuki Taniguchi

Akihiro Yamada

Naoyuki Nagafuchi

Kenji Yamamoto

Naohiro Kusumi

Nobuyuki Hokari

Hisayuki Orita

Masaaki Mukaide

Masato Handa

Mitsuko Fukuda

Shinji Matsuura

Tetsuma Tatsumi

A thermal power plant is proposed for achieving high reliability, low material cost, and low construction cost by devising the arrangement and structures of a boiler, steam turbines, and a flue gas treatment apparatus to reduce a usage amount of high-temperature resistance material and further to reduce a thermal elongation of piping. In a thermal power plant including a 2 pass-type boiler having a furnace for burning fuel, a rear heat recovery area for recovering heat from combustion gas exhausted from the furnace, steam turbines are arranged near the rear heat recovery area.

Thermal power plant

An oxyfuel combustion boiler plant comprising: an air separation unit for manufacturing oxygen by separating nitrogen from air, a boiler having a burner for burning the oxygen supplied from the air separation unit and pulverized coal, and a primary system pipe for supplying the pulverized coal to the burner, an exhaust gas recirculation system pipe for supplying combustion exhaust gas discharged from the boiler to the primary system pipe, and a carbon dioxide capture unit for capturing carbon dioxide in the exhaust gas discharged from the boiler, the oxyfuel combustion boiler plant is further comprising: an oxygen supply pipe for supplying the oxygen manufactured by the air separation unit to the primary system pipe in the burner, and a pipe for supplying the combustion exhaust gas discharged from the boiler to the oxygen supply pipe, wherein an injection port of the oxygen supply pipe is disposed on an upstream side of an injection portion of the burner.

Oxyfuel combustion boiler plant

An oxyfuel combustion boiler plant having a first boiler and a second boiler for injecting gas including oxygen in higher concentration than that in the air, gas including carbon dioxide in higher concentration than that in the air, and fuel from a burner and generating steam by combustion gas in a furnace, respectively, comprising:

Oxyfuel combustion boiler plant and operating method for the same

An oxyfuel combustion boiler plant comprising:

Oxyfuel combustion boiler plant and operation method of oxyfuel combustion boiler plant

The present invention discloses a carbon dioxide capture power generation system provided with a boiler to combust a fuel in the oxygen atmosphere, a carbon dioxide capture equipment to remove carbon dioxide in the wake flow of the boiler, a piping branching from the wake flow of the boiler to recycle the combustion exhaust gas to the boiler, and a desulfurization equipment to remove sulfur oxides and a sulfuric acid removal equipment to remove a sulfuric acid gas in the upstream of carbon dioxide capture equipment and in the wake flow of the boiler.

Carbon dioxide capture power generation system

An oxyfuel boileris equipped with an oxygen separation apparatusto produce oxygen by separating oxygen from the air, a recirculation fanto supply a portion of combustion flue gas branched from the combustion flue gas discharged from the boiler to the oxyfuel boiler, a temperature sensorto detect gas temperature at a boiler outletin the oxyfuel boiler, and a control apparatusto calculate gas temperature at a furnace outletin the boiler from the gas temperature at the boiler outletdetected by the temperature sensorand control the operating condition of the recirculation fanso that the calculated gas temperature at the furnace outletbecomes a desired preset gas temperature.

Oxyfuel boiler and a method of controlling the same

A method for retrofitting a pulverized coal boiler in an air combustion boiler system is disclosed, which has a plurality of burners over a plurality of stages along the vertical direction on a wall surface of a furnace of the pulverized coal boiler and an after-air port for introducing air for two-stage combustion located above the burners to retrofit into a two-stage combustion pulverized coal boiler in an oxyfuel combustion boiler system.

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Hitachiota, Japan

Tsuyoshi Shibata