摘要:
A compact pressurized high-temperature gas cooler having superior heat exchange performance and excellent economical efficiency is provided. A return-flow structure is formed in which a flue through which high-temperature gas flows is formed in a pressure container, a heat exchanger is disposed in the flue, and a partition dividing the internal cross-sectional area of the flue is provided so that the high-temperature gas supplied from a bottom or a top portion of the pressure container flows back in a return direction. The cross-sectional-area division ratio dividing the internal cross-section of the flue is set so that the flow rate of the high-temperature gas flowing in one direction matches that flowing in the direction opposite thereto.
摘要:
A compact pressurized high-temperature gas cooler having superior heat exchange performance and excellent economical efficiency is provided. A return-flow structure is formed in which a flue through which high-temperature gas flows is formed in a pressure container, a heat exchanger is disposed in the flue, and a partition dividing the internal cross-sectional area of the flue is provided so that the high-temperature gas supplied from a bottom or a top portion of the pressure container flows back in a return direction. The cross-sectional-area division ratio dividing the internal cross-section of the flue is set so that the flow rate of the high-temperature gas flowing in one direction matches that flowing in the direction opposite thereto.
摘要:
In a coal gasification furnace adapted to feed pulverized coal thereinto by the use of inert carrier gas and gasify the same, any startup burner can be unnecessitated thereby eliminating any startup combustion chamber. Further, even in the use of a startup burner, it is smaller and lighter in weight than conventional startup burners, allowing the startup combustion chamber to be compact and limiting the height of the entirety of the gasification furnace. As a characteristic feature, a pulverized coal fuel supply passageway (23) to a combustor burner (9) is provided at its midstream portion with a startup gas supply passageway (29) for supply of a startup combustible gas (NG1). After reaching of the temperature of the furnace interior to a first temperature (T1) allowing ignition of pulverized coal with reference to a detected value from furnace interior temperature detecting means (41), transition to combustion by the pulverized coal and carrier gas is effected by increasing the input rate of pulverized coal and carrier gas while decreasing the supply rate of combustible gas (NG1) from the startup gas supply passageway (29).
摘要:
In a coal gasification furnace adapted to feed pulverized coal thereinto by the use of inert carrier gas and gasify the same, any startup burner can be unnecessitated thereby eliminating any startup combustion chamber. Further, even in the use of a startup burner, it is smaller and lighter in weight than conventional startup burners, allowing the startup combustion chamber to be compact and limiting the height of the entirety of the gasification furnace. As a characteristic feature, a pulverized coal fuel supply passageway (23) to a combustor burner (9) is provided at its midstream portion with a startup gas supply passageway (29) for supply of a startup combustible gas (NG1). After reaching of the temperature of the furnace interior to a first temperature (T1) allowing ignition of pulverized coal with reference to a detected value from furnace interior temperature detecting means (41), transition to combustion by the pulverized coal and carrier gas is effected by increasing the input rate of pulverized coal and carrier gas while decreasing the supply rate of combustible gas (NG1) from the startup gas supply passageway (29).
摘要:
A dust collector that collects dust (12) in gas (11) and purifies the gas (11) includes a tube plate (16) being provided in a dust collector frame (13) that separates an interior into a gas introduction chamber (14) and a gas discharge chamber (15), a plurality of dust collection pipes (17) being hung from the tube plate (16) that feeds the gas (11) from outside to inside and removes the dust (12) on a surface thereof, a gas introduction pipe (18) being provided in the gas introduction chamber (14) that includes a gas opening end portion (18a) positioned near the tube plate (16), and supplies the gas (11) to the dust collection pipes (17) in a downflow direction, a diffuser (19) being provided at the opening end portion (18a) of the gas introduction pipe (18), and a gas discharging unit (21) being provided in the gas discharge chamber (15) that discharges purified gas (20).
摘要:
A dust collector that collects dust (12) in gas (11) and purifies the gas (11) includes a tube plate (16) being provided in a dust collector frame (13) that separates an interior into a gas introduction chamber (14) and a gas discharge chamber (15), a plurality of dust collection pipes (17) being hung from the tube plate (16) that feeds the gas (11) from outside to inside and removes the dust (12) on a surface thereof, a gas introduction pipe (18) being provided in the gas introduction chamber (14) that includes a gas opening end portion (18a) positioned near the tube plate (16), and supplies the gas (11) to the dust collection pipes (17) in a downflow direction, a diffuser (19) being provided at the opening end portion (18a) of the gas introduction pipe (18), and a gas discharging unit (21) being provided in the gas discharge chamber (15) that discharges purified gas (20).
摘要:
Synthesis gas (syngas) gasified in a gasification furnace to which coal is introduced burns in a combustor. An exhaust-heat recovery boiler generates steam by using exhaust gas let out from a gas turbine equipped with the combustor. The steam generated in the exhaust-heat recovery boiler is introduced to a steam turbine. A generator is driven by the steam turbine and the gas turbine to generate electrical power. Part of the exhaust gas let out from the gas turbine is introduced to a carbon-dioxide recovery unit, where carbon dioxide is recovered therefrom. Coal is carried to the gasification furnace by the carbon dioxide.
摘要:
Synthesis gas (syngas) gasified in a gasification furnace to which coal is introduced burns in a combustor. An exhaust-heat recovery boiler generates steam by using exhaust gas let out from a gas turbine equipped with the combustor. The steam generated in the exhaust-heat recovery boiler is introduced to a steam turbine. A generator is driven by the steam turbine and the gas turbine to generate electrical power. Part of the exhaust gas let out from the gas turbine is introduced to a carbon-dioxide recovery unit, where carbon dioxide is recovered therefrom. Coal is carried to the gasification furnace by the carbon dioxide.
摘要:
A filter regeneration apparatus of a coal gasification system having a filter for capturing char (unburned matter) present in exhaust gas at an exhaust gas passage communicating with exhaust gas source including a coal gasification furnace, fills the filter container with inactive gas having oxygen concentration of less than 5 vol. % and heat the filter to a target temperature of 400 to 450° C. and feed ashing gas having oxygen concentration of 5 to 15 vol. %, thereby ashing char in the filter. This method and apparatus achieve ashing of char in a safe manner and shortens the time of regenerating the filter by controlling the oxygen concentration in the ashing gas and the filter temperature constantly to reach preset target values.
摘要:
An integrated gasification combined cycle that can adjust the balance of pressure/temperature in an overall plant and can stabilize the output of a gas turbine at an early stage during load variation, and an operation control method of the integrated gasification combined cycle are provided. When a calorific abnormality of fuel gas is detected during load variation of a gas turbine (5b), a load change command value of the gas turbine (5b) is set to zero or is decreased, and based on this load change command value, a power generation output command of the gas turbine (5b) is generated.