Providing supplemental pulverized coal for load regain

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

1979-02-08

1981-04-28

Yuen, Henry C.

Furnaces

Including fluid fuel burner

Powdered solid fuel

110104B, 110263, 110347, F23C 110

Patent

active

042638569

ABSTRACT:
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.

REFERENCES:
patent: 738131 (1903-09-01), Weaver
patent: 1042576 (1912-10-01), Lindhard
patent: 1179784 (1916-04-01), Von Porat
patent: 1354741 (1920-10-01), Harder
patent: 1559220 (1925-10-01), Caracristi
patent: 1562411 (1925-11-01), Caracristi et al.
patent: 2053340 (1936-09-01), Kennedy
patent: 2427903 (1947-09-01), Crites
patent: 3881857 (1975-05-01), Hoy et al.

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