| 摘要 |
<p>PURPOSE:To improve thermal efficiency of an electric power plant by branching a fuel gas guiding passage for guiding fuel gas formed by refining crude formation gas generated by a pressurized gasifying furnace into a gas turbine, and partially supplying fuel gas in order to clean a heat transferring surface of the pressurized gasifying furnace. CONSTITUTION:Coal is gasified by using air by a combustor 3 of a pressurized gasifying furnace 1, and the reaction of the obtained crude formation gas 4 is promoted by a reaction tower 3a composed of a steam generator 4a. The crude formation gas 4 is supplied into a gas cooler 5 and a cyclone 6, and then particle groups are collected and separated, moreover dusts of fine particles are precisely removed by a high-temperature dust removing device 7. After that, the gas is supplied as fuel gas into a gas turbine generator 9. In this case, an auxiliary gas circuit 22 is branched from a fuel gas introducing passage 8, and fuel gas guided into the auxiliary gas circuit 22 is supplied as auxiliary gas into the pressurized gasifying furnace 1 through a heat exchanger 23, a blower 24 and a buffer tank 25, so as to be used for cleaning for a heat transferring surface.</p> |
