FIELD: fuel gas production. SUBSTANCE: ash-rich hydrocarbons are subjected to partial oxidation. Resultant crude gas is cooled first in radiation-type refrigerator and then in convection one, whereupon is washed with water in wet separator to separate solids. Washing water from wet separator is combined with water phase from radiation-type refrigerator and combined liquid is filtered in separating apparatus to filter off precipitate. The latter undergoes partial dehydration and then is treated with acid in separating apparatus. Steam-saturated gas from wet separator is cooled. EFFECT: improved process flowsheet. 5 cl, 1 dwg
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