Process for reacting pumpable high solids sewage sludge slurry

Details Process for reacting pumpable high solids sewage sludge slurry Process for reacting pumpable high solids sewage sludge slurry

1991-09-19

1993-05-18

Kratz, Peter

Gas: heating and illuminating

Processes

Fuel mixtures

48197A, 48206, 48209, 48DIG7, 110341, 110346, 110347, 210758, 252373, C10J 346, C02F 1106

Patent

active

052117235

ABSTRACT:
This invention relates to a novel pumpable sewage sludge fuel and process for burning it. An aqueous slurry of sewage sludge is dewatered and dried to a solids content in the range of about 50 to 99 wt. % in a drying zone in the absence of free-oxygen containing gas but while in contact with a gaseous material selected from the group consisting of N.sub.2, CO.sub.2, H.sub.2, CO, and mixtures thereof. The dried sewage sludge is mixed with a supplementary fuel from the group consisting of solid carbonaceous fuel, liquid hydrocarbonaceous fuel, mixtures thereof, and optionally with water to produce a pumpable slurry fuel feedstream having a solids content in the range of about 50 to 65 wt. % and a higher heating value of at least about 6,000 Btu/lb. The slurry fuel feedstream may be burned in a partial oxidation gasifier, furnace, boiler, or incinerator.

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Perry's Chemical Engineers' Handbook, McGraw-Hill, Fourth Edition, 1963, pp. 19-50.

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