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Патент USA US2117273

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May 17, 1938.
Filed Mar-‘ch 23. 1956
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4`Patented May 17, 1938
John W. Brown, Baltimore, Md._, assigner to
Continental Oil Company, Ponca City, Okla.,
a corporation of Delaware
Application March 23, 1936, 'Serial No. 70,293
4. claims.- (c1. 21o-so)
My invention relates to an apparatus for re
moving oil from water and more particularly for
removing oil from the condenser water, heat ex
changer water. and the like, in oil refineries. ` _
It has been the practice'to provide traps, sepa
rators, and the like, for removing oil from Water
' condensed from steam and used in heat ex
changers for cooling or heating oil. lI‘he devices
of the prior art have been successful in remov
ing the major part of the oil from Water but it
is found that there is alwaysl a trace of oil re
maining in the water which appears when the
water is discharged into a stream. The trace of
oil becomes manifest in a small rainbow or illm
, 50 or 100 yards down stream from the separator
or trap. It may be that this amount of oil is
emulsiiied in the water so that it does not rise
to the top of the Water for removal at the trap.
As the water is discharged into the stream, these
small globules Vof oil will rise to the surface and
20 break, causing a yillm or rainbow.
The discharge of oil into a navigable or pisca
torial stream is usually prohibited by law. Re
dners, furthermore, have been frequently 'sub
25 jected to suits for damage caused by the dis-
charge of oil into streams by riparian tenants.
@ne object of my invention is to provide a
method for removing the last traces of oil from
l water after it has passed through the customary
30 traps or separators employed in the art.
Another object of my invention is to provide an y
shown in Figure 1 taken on a line l-î of Flg-=ure 1.
Figure 3 is a sectional view taken on the line
. 3-3 of Figure 2.
More particularly referring now to the draw
ing, Water containing oil is passed into a set
tling tank i throughl an inlet pipe 2 from a trap.
separator or the like. The settling tank l may
be made of any suitable material and is pro
vided with a plurality of baiiles 3, 4, 5, 6, and ‘7. 10
The baffles form an elongated path through which
the water must flow to an outlet pipe ß for dis
charge into a stream or other body of water.
Positioned between bailles 6 and ‘i is al paddle
wheel 9, suitably> mounted for rotation by the 15
passage of'water to the conñned space between
bailles 6 and l. In order to increase the velocity
of water ñowing by the paddle Wheel, a baille I0,
secured to baille l, may be provided. The paddle
wheel 9 drives a sprocket wheel i'i through a 20
drive chain i2. The sprocket wheel i i is keyed
to shaft i3 which carries a roller it. The roller
i4 is spaced adjacent to roller I5, rollers i4 and
i5 being adapted to act as a wringer. A pair of
, rollers i6 and ii7 are mounted across the top of
the last pass within the settling tank I. A guide `
roller i8 is mounted on the top of baille 1.
Around rollers it, i6, il, and i8 is passed an
endless blanket i9 made of any suitable oil ab- '
sorbent material or libre.
The blanket may be 30
made of cotton toweling, of wool flannel or the
apparatus for removing the last traces of oil from
water contaminated with oil after the water has
like, it being understood that any flexible mate-_
been subjected to the removal of the major> part
and has the power to absorb oil may be employed.
The `blanket is driven by the rotation of roller Il 3;,
so as to' constantly present a fresh surface'to
' the >outgoing water. The oil which is absorbed
by the blanket is squeezedtherefrom between
rollers I4 and I5, which act as a wringer. While
I have shown a paddle wheel drive for the blan- 40
ket, it is 'to be understood that it may be driven
35 of the oil by means of separators or traps.
Other and further objects of my invention will
appear from the following description.
In general my invention contemplates the pro
vision of a settling chamber having a plurality
40 of passes formed by baffles into which the water
containing oil to be separated is passed. The
discharge passage from the settling tank is cov
ered with a, blanket of oil `absorbent. material
which is moved over the surface of the oil to
45 constantly present a fresh oil absorbing surface
to the water.
rial which can be formed into an endless blanket
by means oi’ a small electric motor or by any
other suitable means.
In operation, oil from a separator or trap en
ters the settling tank i through pipe 2. Inas- 45
much as the volume of tank i is large, the body
In ` the accompanying drawing which forms
of liquid passed'thereinto will be substantially
quiescent. A considerable amount of oil will rise
of the instant speciñcation and is to be read
in conjunction therewith and in which like ref
erence numerals are used to indicate like parts
drained through pipe 20 which is provided with 50
in the various views;
a valve 2i. This oil may be passed back to the
to the surface of the water from which it may be
Figure l is a plan view of a device showing one y trap. It'will be observed that the water bearing
embodiment of my invention and capable of car
rying out the method of my invention.
Figure 2 is a sectional elevation of the device
oil must change its direction a number of times
before passing to the outlet 8. The change oi'
direction tends to aidxvin the separation of oil 55
and Water. In passing by the paddle wheel 9 the means for removing liquid adsorbed by said blan
water will rotate the sprocket wheel il through ket therefrom
driving chain I2. The rotation of sprocket . 2. In a device for separating oil from>waterwheel Il will drive blanket I9, presenting a _ bearing the same, a tank, an inlet to said tank
fresh oil absorbing surface ‘to the outgoing oil for introducing` water contaminated by oil into
and water. This oil absorbing surface will readily the tank, an outlet from said tank for withdraw
absorb the last traces of oil so that the eiiluent ing substantially oil-free water therefrom, a plu
water passing to the stream through pipe 8 will rality of baffles positioned invsaid tank between
said inlet and saidoutlet for causing the water
be substantially free of oil which might con
to flow in an elongated path,` an endless blanket lil
taminate the stream into which the water is of oil absorbing material having a portion there
being discharged.
of positioned in said tank in contact with the
It will be understood that certain features and water adapted to absorb oil therefrom, means
sub-combinations are of utility and may be em
for moving said blanket whereby a fresh portion
ployed without reference to other features and
sub-combinations. This is- contemplated by and
is within the scope of my claims. It is further
vobvious that various changes may be made in
details within the scope of my claims without
departing from the spirit of my invention. It is,
20 therefore, to be understood that my invention
is not to be limited to the speciñc details shown
and described.
Having thus described vmy invention, what I
claim is:
1. In a device for separating oil from water,
a tank, an inlet to said tank for water containing
oil to be separated, an outlet from said tank ‘
for discharging water substantially free of oil,
a plurality of bafiies in said tank between said
inlet and said outlet for causing the oil-bearing
water to flow in an elongated path, a water op
erated motor positioned in the path of ñow be
tween said inlet and said outlet, an endless
thereof is continually being contacted with the
water, and means for removing a portion of the
liquid absorbed by said blanket.
3. In a device for removing oil from water, a
tank, an oil contaminated water inlet to said
tank, an outlet from said tank for withdrawing
water substantially free from oil, an endless blan
ket of oil absorbing material having a portion
thereof in contact with the water in said tank,
means for moving said blanket whereby a fresh
portion thereof is` continually adapted to con
tact the water for absorbing oil therefrom, and
means for squeezing absorbed oil from said blan- '
4. In a device of the character described, means
for removing oil from water comprising in com 30
bination an endless blanket of'oil absorbing ma
tcrial having a portion thereof in contact with
water from which oil is to be removed, means
for moving said blanket to continuously present
blanket of oil absorbing material 4having a por
a fresh surface thereof to the waterfrom which 35
tion thereof positioned in said tank in the path voil
is to be removed, and means forremoving
of water flowing to said outlet, means actuated a portion of the liquid absorbed by said blanket.
by said water operated motor for moving said
blanket past the water in contact therewith, and
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