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Patented‘ Dec, 3. i946 '
UNITED STATES I_ PATENT‘ - oF'F-ics Leopold Sender, Baltimore, Md., assignor to The
Sharples Corporation, Philadelphia, Pa” a cor- -
notation of Delaware
Application June 24,1943, Serial No. 492,153
2 Claims. (01. 233-14) 1
The present invention pertains to a centrifuge
designed to effect centrifugation and discharge
of a viscous material, so as to effect-satisfactory
discharge of the viscous material after ejection
thereof from surfaces surrounding the centrifugal
It was conceived in'connection with re- . _
search involving separation of soap from an
aqueous phase in practice of the process of the
patents to Scott, 2,300,749 and 2,300,750, and will
be described speci?cally with respect to problems
involved in practice of such a process. The 'spe
ci?c nature of the invention and the advantages
attained by practice thereof will be ,evident from
consideration of the following detailed description
by that arrow. Soap which may fall from this
‘upper surface .on to the lower surface 20 also has
a tendency to stick to thatvlower surface, and
the present invention is concerned with an ar
rangement preventing stickage to either of these
In connection with many types of soap e?luents'
obtained in continuous soap manufacture by the
process of Scott patents, 2,300,749 and’2,300,750,
the problem of stickage may be solved by injec
tion of water or saponifying reagent into the
covers as taught in those patents, by the use of
devices of the prior art for injection of a spray
of washing liquid into the soap-receiving cover.v
in connection with the attached-drawing, -'in 15 'Thus, for example, a spray of liquid may be in-‘
The single ?gure is a view partly in cross sec
tion and partly in side elevation of the centrifugal
jected into the covers as illustrated and described
in the prior patent to Jones 1,634,243, and such
injection is often adequate to prevent stickage.
In connection with certain very viscous soap e?iu
Referring to the drawing by reference charac 20 ents,‘ however, the problem of stickage has been
ters, the centrifuge of the invention includes a
troublesome even in cases in which the best avail
rotor ill of which only the upper portion is illus
able means of the prior art were employed in
trated. This rotor is designed for securement
injection of washing liquid into the soap-receiv
to a drive spindle (not shown) through a vdrive
ing cover. The present invention is especially
connection II at the upper end of the neck I!
directed to‘"solution of the problemof stickage
separator of the invention.
of the rotor. This neck is provided with a dis-'
charge passage l3 through which the heavier
effluent ?ows from the rotor and is discharged
involved in treatment of soaps which are so tacky
as to present such a problem. '
The problem of prevention of stickage to the
through outlet I4, and with a discharge passage - surface 20 is solved in the practice of the present
l5 through which the lighter e?luent flows from 30 invention by projecting a body of liquid from the
the rotor and is discharged at It. ' The heavier
annulus 2| against a portion of the surface 20
e?iuent ?ows from discharge outlet I4 into a
indicated by the arrows A’, this liquid being pro
receiving cover I1 and the lighter e?iuent ?ows
jected against the surface 20 from a plurality
from discharge outlet (it into receiving cover [8. I of points around the circumference of the an
The features of they centrifuge described above 35 nulus 2i in sufficient volume to form a layer of
liquid ?owing continuously outwardly along the _
are of more or less conventional design and form ‘
conical surface 20 from the zone of impingement
no part of the present invention.“ When a mix-,
ture of soap and aqueous phase is subjected to
A’ of the washing liquid. By maintaining a con
centrifugation in the rotor III, the soap will be
tinuously ?owing layer of liquid along the surface
discharged through the passage i5 and outlet [6,,
20 from a zone within the innermost zone at
while the aqueous phase is discharged through
which soap is projected or falls upon that surface,
the passage I 3 and outlet H. No particular
the soap is adequately prevented from sticking
to the surface 20 and is washed downwardly
trouble is encountered in removal of aqueous
phase from the cover I‘! in such‘ case, since this
through the space S to a, discharge conduit.
aqueous phase (the reagent solution) is a free 45 In conjunction with the above-described ar
rangement for preventing stickage of soap to the
> flowing material, but considerable dimculty has .
been encountered in connection with discharge
surface 20, special means are ‘provided for pre
venting stickage to the upper surface l9. These
of soap from the cover l8, the soap tending to
stick both to the upper surface l9 and the'lower
last-mentioned means include an annulus 2‘! pro
surface 20 of that cover. Soap discharged from 50 vided. with a plurality of circumferentially spaced
the outlet l6 passes tangentially from that outlet
nozzles adapted to project liquid against the
upper surface of a ring 23 which is secured to
and strikes the under surface I!) of the lower
cover in the general zone indicated by the arrows
the‘ centrifugal rotor above the light liquid dis
A, and has a tendency to stick to this upper sur
charge'outlet I 6. In the form of the invention
face adjacent the zone of impingement indicated 55 illustrated, the ring 23 constitutes a ?ange upon
the scope of the invention by the person skilled
a’ sleeve 24 surrounding the neck of the rotor.
Liquid projected through the nozzles in annulus
22 against the upper surface of the ring 23 is
thrown tangentially outward by this ring alas
the result of centrifugal force caused by rotation
of the ring with the rotor. This causes the liquid
. in the art, and I donut therefore wish to be
limited except by the‘ scope of the following
I claim:
. > 1. In a centrifugal separator, the combination
comprising a centrifugal rotor‘designed to dis
charge a viscous e?luent centrifugally against an
upper surface of a, non-rotating receiving cover,
against that surface which might otherwise stick
thereto. Soap loosenedin this manner‘ which 10 and means to project a washing liquid from a
portion of said rotor centrifugally in a direction
falls or is de?ected against the surface 20 is
to be projected against the surface I! with a
swirling motion and to remove soap discharged
diluted with the liquid projected from the ring , -
23, and this dilution tends to make the soap more
v?uid‘ and cause it to flow downwardly along sur- 5
face Zll, and the provision of a continuously flow ~15
mg layer of washing liquid (e. g., water or aqueous
reagent) along this lower surface from the zone
A’ of impingement of this washing liquid from
the annulus 2| precludes stickage of this soaplto
the surface 20. Thus, .by eifecting impingement
of washing liquid against the surface Min 97 zone
within ‘the ‘innermost zone of impact of soap
having substantial circumferential and outward
components against said surface of said receiving
cover at a zone within the innermost zone of
dischargeof said viscous ef?uent against-said sur
face, whereby to effect swirling movement Of said
I washing liquid across said surface against which
‘the viscous effluent ‘is discharged, and thereby
prevent stickage of said effluent to said surface
20 and cause said effluent to be discharged to a
lower surface of said cover, and means for estab
‘ lishing a continuously downwardly and outward
against that surface, stickage to the surface i9
is prevented, while by establishing a ?owing layer
of washing liquid from the zone A’ outwardly‘ 25
along the surface‘ 20, stickage of the soap to the
surface 20 is prevented.
'While the arrangement for establishing a ?ow.
ing layer of water from the annulus 2| along’
the surface 20 is particularly useful in connection 30
with the arrangement for projecting liquid tan
gentially from the ring 23 as described, either of ,
1y ?owing layer of washing liquid from a zone
within the innermost zone of discharge of said
eiiluent against said lower surface ?owing across
said zone of discharge against said lower surface,
whereby to prevent stickage of said effluent to
said lower surface.
2. In a centrifugal separator, the combination
comprising a centrifugal rotor designed to dis
charge a viscous e?iuent centrifugally against an
upper surface of a non-rotating receiving cover, ‘
and a centrifugal flinger secured tosaid rotor and,
these arrangements may be employed to advan
designed to centrifugally project a washing-liq
tage in the absence of the other.’ For example,
ina direction having substantial circumferen
‘in many cases, projection of liquid from the ring
tial and outward components against said sur
1 23 will serve to prevent. stickage of soap to the
face of said receiving cover at a zone within the
surface l9, and the consequent dilution of this
innermost zone of discharge of said viscous ef
' soap will prevent stickage to the surface 20. On
?uent against said surface, whereby to effect
the other hand, in some cases it is possible to
movement'of said washing liquid across
solve the problem of stickage by provision of the 40 swirling
against which the viscous effluent is‘
layer established by projecting liquid to the zone
discharged,’ and thereby prevent stickage of said
. ‘A’ from the annulus 2|, without provision of the
special means provided bylthe ring 23 for remov
ing soap from ‘the surface l9.
Various modifications may be
adopted within 45
effluent to said surface.
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