| 摘要 |
PURPOSE:To save N2 gas and prevent raising of temperature and ignition by oxidation of pulverized coal in a hopper, by using part of discharge gas of discharge gas boiler outlet in cooled and compressed state as pressure medium of rock hopper system for coal supply. CONSTITUTION:The aimed apparatus has dry cool-feeding means constituted by combination of a bin system 26 and lock hopper system 28 and coal is fed into a gasification furnace 1 by the above-mentioned coal feeding means to afford combustible gas, which is purified by purification means such as dedusting apparatus 5 or desulfurization apparatus 6 and the purified combustible gas is fed to a gas turbine 10 to drive the gas turbine 10 and then electricity is generated by a generator 11 and heat is recovered by a discharge gas boiler 13 from discharge gas after combustion from the gas turbine 10. Part of the heat-exchanged discharge gas is passed into a duct 19, cooled with a cooler 13 arranged on the way to the duct 19, compressed by a compressor 17 and led into a lock hopper system 28 and coal is fed into gasification furnace 1 using the above-mentioned discharge gas as a pressure medium to operate the aimed electricity-generating apparatus. |
