Liquid purification or separation – With movable support – Float
Patent
1991-11-12
1992-08-11
Silverman, Stanley S.
Liquid purification or separation
With movable support
Float
210540, 210923, E02B 1504
Patent
active
051376300
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to an oil collecting unit for collecting oil from the water surface, comprising a rotating oil-collecting brush element, a motor rotating the brush element, and a comb member removing oil from the brush element, the brush element being arranged to press the oil below the water surface and then lift it up through the bottom dead center, so that the water adhering to the brushes drops off, and the oil is removed from the brushes by means of the comb member. In particular, the invention is concerned with an oil collecting apparatus which is suited for temporary or rapid installations and which forms an independent entity.
SE Patent Specification 346346, U.S. Patent Specification 3,617,555, and FI Patent Specification 70443 disclose oil collecting apparatuses provided with cylindrical or broad weblike brush elements. A problem with such collecting apparatuses is that oil-containing water tends to escape from the front of the collecting element to the sides so that the brush fibers of the collecting element do not appropriately catch the oil to be collected. GB Patent Specification 2063696 discloses an oil collecting apparatus provided with several disc plates to the surface of which oil sticks and can be removed therefrom. Despite the great number of plates, the capacity of such apparatuses has proved to be low. FI Patent Specification 71596 discloses an oil collecting apparatus in which a mat provided with brush fibers is placed obliquely around rolls, the mat being formed by several parallel chains to which the brush fibers are attached. Water is able to flow through the chains, which prevents the escape of oil-containing water from the front of the apparatus, which, as mentioned above, is a frequent problem with cylindrical brush elements. This kind of apparatus is of necessity rather large in size.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a compact oil collecting unit which is suited for temporary and rapid installations and by means of which any multi-purpose vessel can be changed into an oil collecting vessel. The characteristic features of the oil collecting unit of the invention are defined in the attached claim 1. Preferably the second compartment, which forms a receiver, is lower, and the first compartment comprises discharge openings on both sides. As compared with prior art oil collecting apparatuses of equal capacity, the present oil collecting unit is small in size. The other advantages and embodiments of the invention will be described in connection with a specific embodiment below.
In the following, the invention will be described by way of example with reference to the attached figures, which show one embodiment of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates the use of the oil collecting unit in connection with a multi-purpose vessel.
FIG. 2 is an axonometric view of the oil collecting unit.
FIG. 3 is a side view of the oil collecting unit.
FIG. 4 is a top view of the oil collecting unit.
FIG. 5 is a hydraulic diagram of the oil collecting unit.
DETAILED DESCRIPTION OF THE INVENTION
In a conventional multi-purpose vessel, it is to be preferred to use two oil collecting units. The collecting units are attached to opposite sides of the vessel. In addition to the collecting units, booms 11 are needed the front end of which is attached to the vessel by means of arms and wire-ropes. The other end of the boom is attached to a rail 27 adjacent to an inlet opening 17 formed in the collecting unit. Collected oil is pumped out of the unit through a pipe 15.
In FIG. 2, the oil collecting unit is shown when detached. The body of the unit is formed by a box 1 divided into two compartments. The first compartment 4 contains brush discs 5 rotated by a motor 20 while the second compartment 3 acts as a receiver. The compartments 3 and 4 are separated from each other by a partition wall 2. A pump 13 rotated by a hydraulic motor 14 is provided beneath the receiver. By means of the pump, collected
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Oy Larsen Marin AB
Silverman Stanley S.
Upton Christopher
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