Providing supplemental pulverized coal for load regain

Details Providing supplemental pulverized coal for load regain Providing supplemental pulverized coal for load regain

F - Mech Eng,Light,Heat,Weapons

23

C

110/31

F23C 1/10 (2006.01) F23C 1/00 (2006.01) F23K 3/02 (2006.01)

Patent

CA 1131508

PROVIDING SUPPLEMENTAL PULVERIZED COAL FOR LOAD REGAIN Abstract of the Disclosure An apparatus and method for maintaining the heat input to a pulverized coal-fired steam generator when firing a lower grade coal than for which the pulverizers were designed. A dense phase pulverized coal stream consisting essentially of a mixture of pulverized coal and air having an air-to-coal weight ratio below approximately 1.0 is injected into main pulverized coal stream, thereby providing the necessary supplemental fuel for maintaining the heat input at that full load level.

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