Gas: heating and illuminating – Processes – Fuel mixtures
Patent
1991-06-28
1993-08-10
Kratz, Peter
Gas: heating and illuminating
Processes
Fuel mixtures
48197A, 48209, 48DIG7, 48206, 110346, 210758, C10J 346
Patent
active
052344690
ABSTRACT:
A process for disposing of sewage sludge comprising the steps of, (1) dewatering the sewage sludge to produce an aqueous slurry of sewage sludge having a solids content of about 10 to 50 wt. %; (2) heating and mildly shearing said dewatered sewage sludge at about 150.degree. F. to 210.degree. F. in the absence of air for 3 seconds to 60 minutes by a rotor/mixer at a speed of about 15 to 1000 r.p.m., thereby producing a pumpable slurry having a viscosity of less than about 2500 centipoise; (3) mixing at a temperature in the range of about ambient to 200.degree. F. the slurry of sewage sludge from (2) with a supplemental fuel to produce a pumpable slurry of sewage sludge and supplemental fuel having a solids content in the range of about 50 to 65 wt. % and a higher heating value in the range of about 6,000 to 18,000 BTU/LB; and (4) burning said pumpable slurry from (3) in a partial oxidation gasifier, furnace, boiler, or incinerator to produce an effluent gas stream. In a preferred embodiment, the effluent gas stream is cleaned and purified and non-contaminating ash and slag are separated. By this process, noxious sewage sludge may be disposed of without contaminating the environment.
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Albert Christine C.
DeCanio Stephen J.
Khan Motasimur R.
McKeon Ronald J.
McMahon Matthew A.
Brent Albert
Kratz Peter
O'Loughlin James J.
Texaco Inc.
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