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Патент USA US3080075

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March 5, 1963
‘
A. J. HUNT
INSOLUBLE
3,080,065
SEPARATOR
Filed July 21, 1959
-
2 Sheets-Sheet 1
giw
FIG]
v.
5 .4
?NVENTOR.
ARTHUR U, l/UA/T
ATTORNEY
March 5, 1963
A. J. HUNT
3,080,065
INSOLUBLE SEPARATOR
Filed July 21, 1959
[C3
2 Sheets-Sheet 2
// r/
INVENTOR.
4R7'HUE
BY
7
a. HU/VT
-
-
3,@§,%5
Patented Mar. 5, 1953
2
to the level of the solution washing tank and is ‘arranged
in a circulating system on the suction side of the pumping
means, whereby there is no syphon effect produced upon
3,080,965
INSOLUBLE SEPARATGR
Arthur J. Hunt, ?rraond Beach, Fla, assignor, by niesne
assignments, to N. A. Douglas Mfg, lno, Brmond
Beach, Fla, a corporation of Florida
Filed July 21, 1959, Ser. No. 828,664
3 (Ilairns. (Cl. 210-414)
shut-down of the system; and as a further feature it is an
object to return the fluid after separation from the pulp
mass to the washing tank and to direct the flow in such
manner that force of the pumping means serves to cause
the agitation of insolubles in the washing tank and move
This invention relates to means of separating insolubles
ment thereof toward the exterior.
from liquid solutions, and more particularly to a screw
Even further among the objects of this invention is to
10
extractor for such and other purposes.
disclose a means of extracting insolubles from liquid
Numerous industrial processes are hampered by the
solutions in a dry pulp mass for easier handling and con
problem of removing insolubles from liquid solutions. A
typical example is in bottle washing and like processes
where insoluble foreign substances are rapidly accumu
lated in the washing tanks and seriously reduce the effec
tiveness of the washing solution ‘and cause contamination
of the washing tanks.
In bottle washing facilities, a caustic neutralizing solu
tion is generally used to carry solubles into solution and
to serve as a so-aker for bottle labels and the like.
The
caustic solution is maintained in large tanks through which
the bottles are carried on some form of conveyor system.
In the course of soaking the bottles to remove labels and
the like, a great deal of other foreign debris also collects
in the tanks. The labels and other debris collect on heater
lines, the sides and bottom or" the tanks, on the conveyor
means, etc., and generally disrupts the bottle washing
operation. Such debris also contaminates the caustic
solution and materially reduces its effectiveness within
a relatively short time. An undue build-up of such for
eign matter in a washing tank will even raise the liquid
cleaning solution to the over?ow level and soon cause a
material reduction in the effectiveness thereof.
All previous attempts to remove insoluble impurities
from bottle washing and similar cleaning solutions have
failed in one respect or another. Accordingly, it is com
mon practice in bottle washing facilities to either have
appreciable down-time for tank cleaning purposes, or to
have a separate and distinct stand-by unit ready 'to be
placed in operation.
servation of the strength and effectiveness of the liquid
solutions.
15
.
The apparatus disclosed by this invention is readily
adapted for use with new and older equipment and ac
cordingly enables a quick “?eld change” for improved
operational e?iciency.
The aforementioned and numerous other objects and
advantages in the practice of this invention will be more
apparent upon a reading and study of the following ‘de
scription of a working embodiment of the principals in
volved, and with particular reference to the accompanying
drawings.
in the drawings:
FIG. 1 is a pictorial illustration of the disclosed ex
tractor unit and ?lter system for use with bottle washing
equipment.
FIGURE ‘2 is an enlarged cut~away and cross-sectioned
view of the disclosed screw extractor and scraper-strainer
sleeve assembly.
FIGURE 3 is ‘a diagrammatic top plan view of a bottle
washing tank with the disclosed system incorporated for
use therewith.
FIGURE 4 isv a diagrammatic side plan view of the
disclosed system in use with bottle washing equipment.
The principal components of the disclosed invention,
as used to rejuvenate bottle washing solutions, include a
l9, strainer and extractor unit 26, a ?uid ?ow pump
on, and a ?lter unit 70.
The bottle washing tank It} is such as any reservoir
tank having a prescribed level of a caustic bottle washing
solution 12 maintained therein. A conveyor system 14
passes through the tank lid and carries bottles 16 to be
Aside from the expense of down-time and rejuvena
tion of a washing tank, large quantities of caustic com
pound are required to be used in attempting to maintain
a standard of cleanliness during washing operations and 45 washed through the caustic solution.
are unfortunately lost as a result of tank ?ushing and
A certain liquid level and caustic consistency is re
cleaning operations.
quired to be maintained in the cleaning tank 10. Ac
It is an object of this invention to disclose a simple and
cordinely, as previously mentioned, prior practice has re
effective means of extracting insolubles irorn liquid solu
quired frequent additions of caustic compounds to the
tions.
50 washing solution and periodic shut-downs to enable clean
It is also an object of this invention to disclose means
of continuously extracting insolubles from liquid solution
ing the tanks of debris that collects therein.
'
A planned system of circulating the weakened and in
to prevent the build-up of solution contaminating sub
eifective caustic washing solution is provided by this in
stances therein.
vention to remove impurities and regain the required
Another object of this invention is to disclose a com 55 level of causticity without requiring the use of additional
plete system for continuous rejuvenation of cleaning and
large quantities of expensive caustic compounds.
like solutions without frequent recharging or down-time.
An outlet connection 18 is provided between the tank
Still another object of this invention is to disclose an
extractor particularly suited for separating insolubles from
39 and the strainer and extractor unit 2%. The outlet
connection, at the tank It}, is made near the bottom and
liquid solutions, and without diminishing the effectiveness 60 at one side of the tank. Such connection is preferably
of such solutions when used for cleaning purposes.
made as straight as possible to avoid elbow connections
A further object of this invention is to disclose and
and the like where debris from the tank lit might collect.
teach the use of an extractor screw and suitable ?uid
The strainer and extractor unit 25} include an elon
agitation for the most effective use thereof.
gated and tubular housing member 22 having the outle
Still further among the objects of this invention is to 65 connection 18 from the tank it} connected near one end
disclose and teach the use of a vertically disposed ex
thereof. The housing 22 is intended for a vertically and
tractor of insolubles from liquid solutions in combination
with a scraper-strainer for more e?cient and e?ective op
slightly inclined disposition, as shown by FIGURE 1. A
fluid outlet ?ow connection 24 is provided in spaced ver¢
tical relation to the tank outlet connection 18; which
eration thereof.
Yet another object of this invention is to arrange the ex 70 serves as the inlet to the housing member.
I '
tractor of insolubles in a vertically disposed position such
Within the tubular housing 22 is concentrically dis
that the discharge for the pulp mass is elevated in relation
posed a strainer sleeve 26. This screen-like or perforated
8,080,065
4.
member is spaced from the end of the housing 22 to pro
vide a collecting chamber 28 at the bottom thereof for the
incoming solution and insolubles from the tank 10. A
tapered neck 36 is secured to the end of the strainer 26
to provide a graduated entrance to the strainer part. The
strainer sleeve 26 extends past the housing outlet 24 and
substantially the full length of the housing member.
.
drawn-down in space 46 lowers the level to increase the
di?‘erential head between the tank 10 and sleeve 26 which
responds by increased ?ow from the tank 10. Thus the
system tends to correct itself and reach an equilibrium
condition because the tank and extractor are both Work
ing at atmospheric pressure.
The feed screw 38 is suitably journalled within the
lower end cover 48 of the housing 22. The shaft 40 is
engaged by a tapered pin 50 to a coupling shaft 52 which
34 and 36 on the respective parts. Extension part 32 ex 10 extends through a Water tight gland in the cover 48. The
coupling shaft 52 is engaged to the out-put shaft 54 of a
tends to an elevation in relation to tank 16 (FIG. 4)
suitable reduction gear unit 56 driven by a motor 58. The
such that the solution level is below the outlet end so
motor and reduction gear assembly are mounted on a
that there is no syphon effect created or drainage and loss
stand 59 which also serves to support the tubular housing
of solution when the apparatus is shut down. The
22. It will be appreciated that the ?ow connections 18 and
strainer sleeve 26 is engaged and centered by the exten
24 afford intermediate support for the housing, adequate
sion part 32 at its upper end; as shown by FIGURE 2.
for the slight inclination required (and which is some.~
A11 extractor screw 38 is disposed centrally within the
what exaggerated in FIGURE 1).
housing 22 and through the strainer 26. The screw 38
A ?uid circulating pump 60 is connected to the outlet
includes a shaft 40 with a full bladed helix feed screw 42
24 from the housing 22. Accordingly, the pump draws '
provided thereon. The feed screw blades extend from
the debris laden washing solution into the strainer 26 and
within the chamber area 28 to and just beyond the end of
extracts the cleaner solution therethrough. The insolu
the strainer 26. The screw is intended to wipe the inner
bles are left on the upstream side of the strainer 26 and surface of the strainer. 26 and to feed any substances
are extracted by the feed screw 38 through the open upper
collected thereon towards the open upper end of the
end of the housing member.
housing.
The circulating pump 60 passes the cleaner washing
One or more wiper blades 44 may be provided periph
solution directly into a return flow line 62. The return
erally of the screw blades 42 and within the tapered
line 62 is divided into separate ?ow lines 64 and 66 which
neck 39 at the lower end of the separator sleeve 26. These
enter the side of the tank 1!} and extend towards the op
a?ord additional wiping in such areas and prevent a build
up of debris that might causev binding of the screw in this 30 posite side thereof. The return ?ow may be directed
A smaller diameter extension part 32 is secured to the
end of the housing 22 by means of complementary ?anges
vicinity.
against the opposite tank wall. However, best ?uid. agi
. vIt WTll be appreciated, that ?uid ?ow is from the collect
tation and circulation is obtained in the use of a reverse
nozzle arrangement 68 at the end of each of the return
ing chamber 28, centrally into the strainer 26, and through
lines 64 and 66. By directing the return ?ow back
the perforated or otherwise ventilated side walls thereof.
The annular space 46, between the strainer and housing 35 towards the tank outlet 18, a more direct and positive cir
culation is obtained. The positive circulation from noz
walls, above the outlet ?uid ?ow connection 24, enables
zles 63 is toward the suction line 18 so that insolubles
a ?uid head to be maintained in the housing which ade
collecting at the tank bottom are agitated toward the line
quately covers the ?uid outlet 24 and enables drainage
18 and the tank is thus constantly being ?ushed so that
through the strainer thereover. Neck 30 serve to sepa
contaminating substances do not remain in the tank for
rate chamber 28 from space 46 and comprises means for
any extended periods. 7
resisting the passage of insolubles from the inlet chamber
A ?lter unit 70 is connected into the return ?ow line
28 into the space 46, and in the illustrated embodiment,
62 by a connecting ?ow line 72. The ?lter unit 70 is of
the neck is screen like or perforated in the manner of the
the conventional type used to remove soluble impurities
sleeve.
\
More particularly in view of the showing in FIGS. 2
and 4, the system of tank 10, extractor 22, and the con
necting conduit means 18, 24, 62, 64 and 68 is arranged
to have a static condition, with the pump 66 non-opera
tive, such that the level of cleansing solution in the tank
‘19 is substantially the same in the bore of perforated sepa
rator sleeve 26 and in the annular space 46 in housing 22.
The extension part 32 is always open to atmosphere so
that there is no plug condition to prevent the space 46
from being at atmospheric pressure just as is tank 10:.
Upon start-up pump 60 the ?uid to be reclaimed and re
turned to tank 10 for reuse is ?rst drawn from the column
in the space 46 above the elevation of outlet 24, which
draw-down causes a static head di?erential between the
and minute particles from ?uid passing therethrough.
Fluid ?ow from line 72 is directed into the top of the
?lter unit 79 and returns from the bottom. The return
line 74 from ?lter 70 is directed to the top of the tank
10 and is preferably disposed directly over the conveyor
14 to flush any labels or the like collected thereon.
A fresh water line 76 (FIG. 1) is connected to the ?lter
unit 70, for back washing purposes, and a back wash
drain line 78 is provided. The fresh water line 76 con
nects through ?ow line 80 to the ?lter feed line 72 and
through conduit 82 to the bottom of the tank for other
?ushing purposes. Suitable control valves 84 and 36 are
in the fresh water lines 8%) and 82, a pressure gauge 88
and valve 9t) is in the filter feed line 72, and valves 92
and 94 are in the pump line 62 and drain line 78, re
level in the sleeve 26 and space 46. The differential head
‘
permits free ?uid to pass outwardly to the space 46 where 60 spectively.
It will be appreciated, though not illustrated, that other
by a static head differential is caused between the level
control valves may be incorporated into the disclosed
in sleeve 26 and tank 10. The higher tank level thereby
system for better ?ow control. For example, the, tank
tends to feed the sleeve 26 to restore the equilibrium, but
lines 64 and 66 may include valves which enable ‘one or
the pump 61) keeps the differential head between space
46 and sleeve 26 so that the ?ow» from tahk 10 continues 65 the other to receive full return ?ow for periodically re
versing the circulating ?ow pattern in the tank.
by the di?erential level condition. In this system, there
An upright funnel 96 is shown by FIGURE I mounted
fore, the pump 60 draws ?uid from the space 46 and not
on a stand 98 and having its funnel end 10!} disposed
from the tank 10, and the level of ?uid in the space 46
under the upper end of housing 22. This accessory item
tends to rise or fall as the ?ow of ?uid burdened with
insolubles varies in its density of the insolubles. The less 70 is principally to enable collecting the paperand other
pulp extruded from the strainer-extractor unit 20 in the
insolubles in the flow over from tank 10 means that there
course of its operation. The funnel shank 162 is hollowv
is less resistance to ?uid ?ow and the level in the sleeve
and open at its lower end to enable collection; of'the
26 rises which also raises the level in space 46. More
pulp mass in a bucket which can be placed under the
insolubles in the flow, as when a slug of the same is
entrained, increases the resistance so that the pump 75 supporting stand.
3,080,065
5
6
Operation and Use
The disclosed ?uid circulating and cleaning system is
extremely ef?cicnt for removing bottle labels and other
are carried to the height of the liquid head in the sepa
rator housing 22. As this mass builds up, the substances
collect on the blades 42 and build up until the pitch
space
is ?lled. Continued action causes a compression
debris, and as a washing compound ?ltering unit. The
and wringing of the pulp mass along with movement out
disclosed equipment is intended to operate continuously
of the ?uid and towards the open end of the housing.
with the bottle Washing machine. It may also be left in
The
surplus liquid wrung from the extruded pulp mass
operation after the bottle washing equipment operations
falls through the separator screen 26 and into the annular
are concluded for the day. It is intended to change the
space 44 from whence it is returned to the tank 10.
Washing solution in the washing tank 10 very rapidly
The cleaner ?uid, with the labels and other debris sep
and many times per hour. In this manner it draws all 10
arated out, flows through the pump 60. A part of the
?oating labels and heavier foreign matter away before
return flow passes through the ?lter unit 70 where other
they can settle. The extractor screw 38 handles all
smaller impurities and certain soluble substances maybe
labels, small pieces of glass and miscellaneous items which
extracted
and removed from the caustic washing solu
collect in the tank it} in the course of bottle washing oper
tion. The ?lter acts independently of the rest of the unit
ations.
and at a slower rate. It is separated from the separator
The combination strainer and extractor unit 20 is pref
unit
to enable a faster displacement of the bottle wash
erably installed near one side or end of the tank it} to
ing‘compound and greater assurance of capturing labels
be treated. Valves and ?ttings complementary to the
vin suspension and on the tank bottom by rapid and un
inlet connection 18 to the sludge removing extractor
unit are used and the tank connection is made as near
the tank bottom as is possible. The extractor unit 20
is then tilted up until its end 32 is above the operational
water line in the tank 14?. This assures against over?ow
through the housing 22 during normal cleaning opera
tions.
After the pump 64.} is connected to the outlet line 24
from the extractor unit 20, its rotation should be checked
to assure that it will draw water from the extractor and
return it to the tank it).
interrupted ?ow through the separator.
A faster ?ow through the ?lter is obtainable by proper
manipulation of the correct shut-off valves. However,
it must be remembered that any appreciable restriction
in the ?ow of the caustic washing solution through the
major flow lines may seriously affect the movement of
labels and other insolubles in the tank 10.
The ?lter is readily shut-off from the rest of the
installation and back-Washed whenever considered neces
sary. Periodic inspection of the ?lter output is advisable
to avoid undue restriction of ?ow through the ?lter
The return line 64, and more particularly lines 66 30 system.
and 68, from the pump 64? are cut into the tank 143 at
Although this application has been directed principally
the far side or end from the outlet 13. This assures
to the use of the disclosed system in bottle washing
a good sweeping movement in the fl w of ?uid through
operations, it will be appreciated that the system is equal
the tank and back for recirculation through the cleaning
ly applicable for use in any system or process requiring
35 the
units.
separations of insolubles from a liquid ?uid solution.
. , The ?ow lines to the ?lter 7d are more or less con
This applies equally as well to systems in which the ?uids
ventional, as mentioned. However, it is preferable to
or the insolubles are the necessary end product.
have the ?lter lines of smaller size than the separator
Although only one embodiment of this invention has
lines to enable more frequent circulation through the
been disclosed, it will be appreciated that certain modi
separator unit 26 than through the ?lter 7%. Only a 4:0 ?cations
and improvements may be made for use in other
part of the ?uid ?ow need pass through the ?lter 7t) dur
and
similar
systems. Accordingly, the hereafter appended
ing the ?uid circulation due to the large quantity of ?uid
claims are intended to be inclusive of such other forms
being moved.
of this invention unless expressly denied by the language
thereof.
plate across its bottom, it is advisable to cut moderate 45
1 claim:
size holes through the divider wall and to pipe the return
1. A device for extracting insolubles from a liquid, said
lines 66 and 68 on opposite sides thereof. This enables
device comprising an elongated casing having one end
labels and other debris to move from one section of the
higher than the other end and being provided with an inlet
tank to the other and control as regards forcing labels
opening adjacent the lower end, the higher end providing a
from side or the other by closing off one of the flow lines 50 discharge opening, said casing having a body of cleaned
65 or 63.
liquid therein of which the surface level is spacedly above
Although the disclosed system will remove accumulated
said inlet opening, a sleeve having an upper end portion
labels as Well dirty caustic solutions, it is preferable to
engaging with said discharge opening and having a per
start with a clean machine.
forate portion extending downwardly from said discharge
Upon the opening of the proper valve to the separator 55 opening spacedly within said casing and entering said
and extractor housing 22, the water level will rise to that
body of cleaned liquid, said perforate portion of said sleeve
in the tank it}. Operation of the pump as will reduce
terminating in a lower end located below said liquid level,
the liquid head slightly but not enough to uncover the
means resistant to passage of insolubles joined to said
outlet 24. Accordingly, the pump 69 is always primed
sleeve lower end and extending outwardly therefrom and
and ready for operation.
meeting said casing above said inlet opening, said means
Operation of the pump 6b‘ and of the drive motor 58
de?ning an inlet chamber communicating with the interior
are initiated together, in most instances. The pump be~
of said sleeve through its said lower end, a conveyor op
gins to draw caustic washing solution from the tank 19
eratively mounted in said sleeve and having a lower por
and through line 13 into the separator housing 22. The
tion
Within said inlet chamber and an upper portion in
liquid solution with its labels and other foreign matter 65 said upper end portion of said sleeve and an intermediate
is drawn into the strainer sleeve 26, but only the liquid
portion contacting interiorly a part of said perforate por
is drawn through the perforated or otherwise ventilated
tion of said sleeve which lies below said liquid level, said
sleeve member. The size of the openings in the separa
casing being provided with an outlet opening communicat
tor sleeve to a large extent determine the degree of
ing with the space therein outwardly of said sleeve and
cleanliness obtained.
, In cases where the washing tank It} includes a dividing
As the bottle labels and other foreign matter collects
70 above said means, and other means including said inlet
and outlet openings for supplying liquid burdened with
insolubles into said inlet chamber and for removing
turning and its helical blades scrape the strainer clean
cleaned liquid from said space, said other means being
and carry the debris upward. The paper and lighter sub
operative to maintain said liquid level above a lower part
stances swirl and wrap about heavier particles and both 75 of said perforate portion of said sleeve which is contacted
on the inside of the separator 26, the feed screw 38 is
3,080,065
7
by said conveyor, said conveyor being operative‘ to raise
insolubles through said lower part of said perforate por
tion of said sleeve which is under the level of liquid in said
casing and progressively increasing the concentration of
insolubles so raised toward the liquid level and thereafter
to. raise the insolubles into the perforate portion of the
sleeve above the liquid level to drain liquid therefrom and
?nallyr to discharge the insolubles from the upper end of
the sleeve.
2. A device for extracting insolubles from a liquid, said
device comprising an elongated casing having one end
higher than the other end and being provided with an
inlet opening adjacent the lower end, the higher end pro
8
said device comprising-an elongated casing having one end
higher than the other end and being provided with an inlet
opening adjacent the lower end, the higher end providing
a discharge opening, said casing having a body of cleaned
liquid therein of which the surface level is spacedly above
said inlet opening, a sleeve having an upper end portion
engaging with said discharge opening and having a per
forate portion extending downwardly from said discharge
opening spacedly Within said casing and enterihg said body
of cleaned liquid, said perforate portion of said sleeve
being of constant size and terminating in a lower end
located below said liquid level, means resistant to passage
of insolubles joined to said sleeve lower end and extending
outwardly therefrom and meeting said casing above said
viding a discharge opening, a sleeve having an upper
end portion engaging with said discharge opening and hav 15 inlet opening, said means de?ning an inlet chamber com
municating with the interior of said sleeve through its
ing a perforate portion extending downwardly from said
said lower end, a screw conveyor operatively mounted in
discharge opening spacedly within said casing and termi
said sleeve and having a lower portion within said inlet
chamber andan upper portion in said upper end portion
ing outwardly therefrom and meeting said casing above 20 of said sleeve and an intermediate portion contacting in
teriorly a part of said perforate portion of said sleeve which
said inlet opening, and means de?ning an inlet chamber
lies below said liquid level, said casing being provided
communicating with the interior of said sleeve through
with an outlet opening communicating with the space
its. said lower end, a conveyor operatively mounted in said
therein outwardly of said sleeve and above said means,
sleeve and having a lower portion within said inlet cham
nating in a lower end, means resistant to passage of in
solubles joined to said lower end of said sleeve and extend
ber and an upper portion in said upper end portion of said 25 and other means including said inlet and outlet openings
for supplying liquid burdened with insolubles into said
sleeve and an intermediate portion contacting interiorly
inlet chamber and for removing cleaned liquid from said
said perforate portion of said sleeve, said casing being
space, said other means being operative to maintain said
provided with an outlet opening communicating with the
liquid level above a lower part of said perforate portion
space therein outwardly of 'said sleeve and above said
means, said outlet opening being located spacedly above 30 of said sleeve which is contacted by said conveyor, said
conveyor being operative to raise insolubles through said
said lower end of said sleeve, and other means including
said inlet and outlet openings for supplying liquid burdened
with insolubles into said inlet chamber and for removing
cleaned‘liquid from said space, said other means being
operative to maintain said liquid level above a lower part
of said perforate portion of said sleeve which is contacted
by said conveyor, said conveyor being operative to raise
insolubles through said lower part of said perforate por
tion of said sleeve which is under the cleaned liquid level
and progressively increasing the concentration of insolu 40
bles so raised toward said liquid level and ‘thereafter to
raise the insolubles into the perforate portion of the sleeve
above the liquid level to drain liquid therefrom and ?nally
to discharge the insolubles from the upper end of the
45
sleeve.
3. A device for extracting insolubles from a liquid,
lower part of said perforate portion of said sleeve which
is under the level of liquid in said casing and progres
sively increasing the concentration of insolubles so raised
toward the liquid level and thereafter to raise the insolu
bles into the perforate portion of the sleeve above the
liquid level to drain liquid therefrom and ?nally to ‘dis
charge the insolubles from the upper end of the sleeve.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,580,476
1,810,789
2,761,799
Fassio _____________ __'__ Apr. 13, 1926
Reynolds _____________ __ June 16, 193i
Schroeder _____________ __ Sept. 4, 1956
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