Process for recovering crude oil or refinery products from sludg

Details Process for recovering crude oil or refinery products from sludg Process for recovering crude oil or refinery products from sludg

1988-01-06

1992-01-07

Konopka, Paul E.

Cleaning and liquid contact with solids

Processes

Hollow work, internal surface treatment

208 13, 134 24, 134 40, 134 88, 134167R, 137 13, 137 15, 239251, B08B 302, B08B 9093, C23G 5024

Patent

active

050787993

ABSTRACT:
To render residues such as thickened sludge and sedimented crude oil or refinery products which collect at the bottom of a tank into pumpable flowable condition, crude oil is taken from an upward region of the tank, pumped upwardly to a suction pump (609)-pressure pump (605) unit (610) located, for example, on top of a floating roof of the tank, the pressurized crude oil taken from the top portion of the tank being reintroduced through a preferably rotating liquefaction lance (13) to a region in the vicinity of the sedimented sludge. The pressure is converted into hydrodynamic energy. Preferably, a plurality of such lances are used, arranged with respect to each other to form eddies or vorteces, to establish flow patterns within the tank, thereby liquefying the sludge or residues and rendering them into pumpable flowable condition for removal from the tank. Preferably, the suction and pressure pump together with the motor include a portable unit which can be placed on a floating roof, the respective inlet and lance portions being introduced through openings in the roof, for example coaxial with leg sleeves (601) customarily attached to such roofs and already present therein.

REFERENCES:
patent: 2574958 (1951-11-01), Carr
patent: 3125295 (1964-03-01), Moss et al.
patent: 3125297 (1964-03-01), Copeland et al.
patent: 3436263 (1969-04-01), Strenkert et al.
patent: 3809317 (1974-05-01), Bender
patent: 3874399 (1975-04-01), Ishihara
patent: 4426233 (1984-01-01), Manabe et al.
patent: 4592786 (1986-06-01), Williams et al.

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