Process for gasifying or combusting solid carbonaceous material

Details Process for gasifying or combusting solid carbonaceous material Process for gasifying or combusting solid carbonaceous material

1990-02-08

1990-11-13

Kratz, Peter

Gas: heating and illuminating

Processes

Fuel mixtures

48203, 48206, 48210, 110347, 122 4D, C10J 354

Patent

active

049699300

ABSTRACT:
An apparatus for gasifying solid carbonaceous material in a circulating fluidized bed reactor. Particles are separated from the product gas at least in two stages so that in the first stage mainly coarser, so-called circulating particles are separated and returned to the reactor. In the second stage fine carbonaceous and ash-containing particulates are separated from the gas and are made to agglomerate at a raised temperature. Coarser particles thus received are returned to the reactor through a return duct together with circulating particles. Agglomeration is effected in a chamber where a fluidized bed composed of coarse particles is maintained. Fine particulate material and oxygen containing gas are introduced into the free upper part of the chamber so as to form a hot flame (e.g. 1200.degree. C.). The point of the flame penetrates into the fluidized bed. The ash material contained in the fine particulate material melts, and is conducted to the bubbling fluidized bed.

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patent: 4315758 (1982-02-01), Patel et al.
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patent: 4696678 (1987-09-01), Kayama et al.
patent: 4709662 (1987-12-01), Rawdon
patent: 4721514 (1988-01-01), Kikudo et al.
patent: 4823739 (1989-04-01), Marcellin
patent: 4896717 (1990-01-01), Campbell
patent: 4929255 (1990-05-01), Hakulin et al.

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