| 摘要 |
As shown schematically in FIG. 1 , hot gases, containing oxygen, from generator elements, ( 14 ) and ( 19 ), pass through a bed of coal chunks in an ODD reactor, ( 2 ). The oxygen content of these hot gases is less than stoichiometric, relative to the coal volatile matter content, so that partial oxidation of only the volatile matter occurs within the ODD reactor ( 2 ), during devolatilization therein. Two products are thusly created, a partially oxidized, and hence cleaner burning, volatile matter fuel gas, and a solid devolatilized coke. The hot coke is transferred, by overfeed, into a coke reactor, ( 7 ), where counterflowing primary air, via air meter, ( 12 ), gasifies the coke into carbon monoxide with some carbon dioxide. Finally, the carbon monoxide and the partially oxidized volatile matter, are admixed with overfire air, and burned fully to carbon dioxide in overfire burners, ( 23 ), ( 26 ). The resulting hot burned gases flow into the nozzle inlet, where, after mixing with bypass air, they expand through the expander portion of a gas turbine engine. Coal ashes accumulate at the bottom, ( 9 ), of the coke reactor, ( 7 ), where the overlying coal chunks prevent ash particle carryover into the turbine blades. Low cost coal can thus be cleanly used as an energy source for gas turbine engines.
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