Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Patent
1985-08-19
1991-08-20
Pal, Asok
Cleaning and liquid contact with solids
Processes
Hollow work, internal surface treatment
15302, 134 19, 1341044, 2102571, 210332, B08B 908
Patent
active
050411659
ABSTRACT:
The disclosed cleaning method is carried out using a pressure vessel containing a cleaning liquid pumped out of the pressure vessel and into a dirty tank. Cleaning liquid and dislodged contaminants are sucked up from the dirty tank by a partial vacuum created above the cleaning liquid within the pressure vessel. Solids and cleaning liquid are pumped from the pressure vessel at a first rate and are separated by a solids separator with the cleaning liquid being centrifuged to remove fine solids and then collected in a makeup tank. Cleaning liquid from the makeup tank is pump into the dirty tank at a second rate, less than the first rate. Excess liquid in the makeup tank is sucked back into the pressure vessel. A phase separator, mounted beneath the suction inlet, speeds the separation and concentration of solids, liquids and gases/vapors. The phase separator includes a number of vertically aligned, downwardly and inwardly tapered truncated conical concentrators with open tops and open bottoms above and below the free surface.
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Oliver, J. T., Western Electric Technical Digest No. 37, pp. 19-20, Jan. 1975.
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