Furnaces – With fuel treatment means – Preliminary refuse treatment means
Patent
1981-06-15
1983-06-21
Favors, Edward G.
Furnaces
With fuel treatment means
Preliminary refuse treatment means
110221, 110238, F23G 504
Patent
active
043888755
ABSTRACT:
An evaporative concentrator for sewage sludge installed between hopper A and drying furnace C; the one set consisting of heating chamber B.sub.1 and evaporation chamber B.sub.2 having a construction so that the said one set or several sets are provided in series.
Sewage sludge in the hopper-type bottom of evaporating chamber B.sub.2 is pressurized and sent into sewage sludge pass-way 42 in heating chamber B.sub.1 by compulsory supply means 48, the sewage sludge is heated in heating chamber B.sub.1, the pressurized and heated sewage sludge is led to the upper space of evaporating chamber B.sub.2, a part of the water content is vaporized by allowing the said sewage sludge to be sprayed into the said upper space in which the pressure is lowered, the steam is taken out of the system through exhaust gas pipe 46 having condenser 47 at the end, the sewage sludge somewhat cooled by evaporative latent heat removed is recovered in the hopper of evaporating chamber B.sub.2 and is recirculated by compulsory supply means, while sewage sludge is fed by another compulsory supply means 1 and a part of the sewage sludge is discharged by distribution means 51.
The several sets of heating chamber B.sub.1 and evaporating chamber B.sub.2 are connected in series to concentrate sewage sludge by evaporation.
REFERENCES:
patent: 4153411 (1979-05-01), Isheim
patent: 4232614 (1980-11-01), Fitch et al.
patent: 4245570 (1981-01-01), Williams
patent: 4311103 (1982-01-01), Hirose
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