Gasification of carbonaceous solids

Details Gasification of carbonaceous solids Gasification of carbonaceous solids

1975-08-15

1976-10-26

Lindsay, Jr., Robert L.

Gas: heating and illuminating

Generators

Cupola

48 77, 48197R, 48202, 48206, 48210, 122 5, 252373, C10J 320, C10J 306

Patent

active

039881237

ABSTRACT:
A process and apparatus for converting coal and other carbonaceous solids to an intermediate heating value fuel gas or to a synthesis gas. A stream of entrained pulverized coal is fed into the combustion stage of a three-stage gasifier along with a mixture of oxygen and steam at selected pressure and temperature. The products of the combustion stage pass into the second or quench stage where they are partially cooled and further reacted with water and/or steam. Ash is solidified into small particles and the formation of soot is suppressed by water/steam injections in the quench stage. The design of the quench stage prevents slag from solidifying on the walls. The products from the quench stage pass directly into a heat recovery stage where the products pass through the tube, or tubes, of a single-pass, shell and tube heat exchanger and steam is generated on the shell side and utilized for steam feed requirements of the process.

REFERENCES:
patent: 1467957 (1923-09-01), Snyder
patent: 2987387 (1961-06-01), Carkeek et al.
patent: 3000711 (1961-09-01), Eastman et al.
patent: 3018174 (1962-01-01), Steever

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