Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Patent
1987-03-09
1989-05-09
Sneed, H. M. S.
Cleaning and liquid contact with solids
Processes
Hollow work, internal surface treatment
134 251, 134 254, 134 39, 134 40, 134168R, 134169R, 134172, 134175, 134200, 134201, 210767, 210535, B08B 900
Patent
active
048286257
ABSTRACT:
Apparatus and method for removal of sludge (26) from a tank (10) having a floating roof (16) floating on the upper surface of oil within the tank (10). Discharge nozzles (58) are received within existing sleeves (22) on the floating roof (16) and positioned adjacent the upper surface of the sludge (26) for the recirculation of the contents of tank (10) directly into the sludge (26) from a position above the sludge (26). A recirculation pump (30) provides pressurized fluid to a manifold (48) on roof (16) for distribution through flexible lines (54) to the discharge nozzles (58).
REFERENCES:
patent: 3407099 (1968-10-01), Schnell
patent: 3895756 (1975-07-01), Jaeger
patent: 4201597 (1980-05-01), Armstrong et al.
patent: 4244523 (1981-01-01), Looper
patent: 4364776 (1982-12-01), McBride et al.
Refinery Services International Process for Cleaning Storage Tanks.
Cohen Sharon T.
Nalco Chemical Company
Sneed H. M. S.
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