Process of controlling the starting up of the gasification of so

Details Process of controlling the starting up of the gasification of so Process of controlling the starting up of the gasification of so

1991-10-15

1992-09-08

Kratz, Peter

Gas: heating and illuminating

Processes

Fuel mixtures

48203, 48206, 48210, 48DIG4, C10J 354

Patent

active

051454912

ABSTRACT:
Fuels are gasified in a fluidized state by a treatment with oxygen-containing gas and water vapor in a gasifying reactor. A solids mixture which contains ash and fine-grained fuels is combusted in a heating-up phase, which precedes the gasification and in which the temperature in the reactor is increased approximately to the temperature desired for the gasification. In a succeeding inertizing phase the supply rate of oxygen-containing gas is decreased and an inert gas is fed to the reactor until the product gas no longer contains free oxygen whereas the temperature is maintained virtually constant. In the succeeding gasification the fuel supply rate is increased and, after an adjusting time, the temperature is maintained virtually constant at the value desired for the gasification in the range from 600.degree. to 1500.degree. C. The gasification temperature is controlled by a change of the fuel supply rate.

REFERENCES:
patent: 4113445 (1978-09-01), Gettert et al.
patent: 4255135 (1981-03-01), Grim
patent: 4338074 (1982-07-01), Johansson
patent: 4353712 (1982-10-01), Marion et al.
patent: 4378974 (1983-04-01), Petit et al.
patent: 4594967 (1981-06-01), Wolowodark
patent: 4809624 (1989-03-01), Van Der Bungt
patent: 4881949 (1989-11-01), Brungel et al.
patent: 5014632 (1991-05-01), Fraksson

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