FIELD: oil and gas industry.
SUBSTANCE: brown coal with the moisture content of 20-53% up to the fraction size of 2-3 mm and then delivered to two-stage vortex drying by the intake of a part of a generator gas from a gas-generator plant with a temperature of 960°C with O2 unavailable in it. Dried coal is mixed with water to receive a coal-water slurry, which is subject to fine grinding, thereafter it is diluted by water up to the ratio of L:S=2:3, and gasification is made by the delivery of air at a pressure of 0.1-0.11 MPa at a temperature of 850-1100°C. The quantity of blown air (α) is equal to 0.25-0.35 of stoichiometric quantity (α=1), required for the complete oxidation of carbon, hydrogen and sulphur contained in dry ash-free basis of the gasified brown coal.
EFFECT: invention allows improving the efficiency factor and the production output of the gasification process and exclusion of the explosive risk.
1 dwg
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