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Патент USA US3080067

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March 5, 1963
w. R. MOBLEY
3,030,057
BELOW ATMOSPHERIC PRESSURE METHOD AND MEANS FOR SEPARATING
LIGHTER LIQUIDS FROM HEAVIER LIQUIDS
Filed March 13, 1959
ilnited dtates
5%
2
3,98%,95?
Patented Mar. 5, 1963
2
3,080,057
BELOW A'I‘MOSPHERIC PRE§SURE NETHOD AND
DEANS FGR SEPARATING LIGHTER LIQUmS
FROM HEAVER LIQUIDS
Wiliiam R. Mobley, Dade County, Fla.
(R0. Box 2311, Miami 14, Fla.)
Filed Mar. 13, 195?, Ser. No. 792367
5
(‘Cl- 210-33)
FIGURE 3 is a perspective view partly in section show
ing the cleanout chamber and the screen for the larger
solid materials with the air separator and vortex prevent
ing chamber combined as a single unit which preferably
is substituted for the separate units shown in FIGURE 1.
Referring to the drawing and particularly to FIGURE
1, it will be observed that I have disclosed an inlet line 8
which leads from the supply source (not shown) into the
cleanout chamber 9. Within the cleanout chamber 9, I
This invention relates to the separation of immiscible 10 have disclosed a screen 10 and a line 14a leading from
liquids of different speci?c gravities, but more particularly
behind the screen from the cleanout chamber 9 into the
to separation of liquids by a system providing a verti
vortex preventing chamber 12. Leading from the-top of
cally extended liquid column, to which liquid mixtures to
the air separating and vortex preventing chamber 12, I
be separated and from which separated heavy liquids
have disclosed an air vent 13 which may be extended
are respectively admitted and discharged at the bottom 15 upward to any desired elevation. Leading from the bot
region, with the region above the heavy liquid discharge
tom of the vortex preventing chamber 12 I have disclosed
point being subjected to a pressure below atmospheric.
a trapped discharge line 14 leading into the interior of the
The primary object of this invention is to eliminate the
separating chamber 1. It will be observed in FIGURE 3
complicated method of opening and closing valves and
that the line and coupling 19 shown in FIGURE 1 are
the undesirable feature of closing down the system in order 20 eliminated and the vortex preventing chamber 12 is con
to remove the accumulated lighter liquids after separa
nected to the bottom of the cleanout chamber 9 and the
tion, which have attended systems of this general char
trapped discharge line 14 is connected to the inlet line
acter in the prior art.
leading into the separating chamber 1 by union 19a. It
Another object of the invention is to provide a simple
will be observed that I have disclosed a trapped discharge
method for the initial priming of a separator unit and for
line 16 leading from near the bottom of the separating
the removal of the accumulated air or gases from the sys
chamber 1 and connected to the disposal system line 17 by
tem without valves. This feature makes it possible to
the union 1%. The line 17 is provided with an air vent 18
remove the air or gases for the initial priming and to
which may be extended to any desired elevation. Leading
evacuate the lighter separated liquids by the simple method
from near the top of the said separating chamber 1, I have
of starting and stopping a motor driven pump.
disclosed a light liquid discharge line 5. The said line
An additional object of the invention is to provide a
5 forms a trap at the bottom of the chamber 1 and ex
structure whereby the solids such as sand, gravel and other
tends upward and passes through the wall of chamber 1
heavier solids will continuously evacuate with the heavy
liquid and will not accumulate to clog the system.
A still further object of the unit is to provide a simple
method of cleaning without closing down the operation
in air tight relation. Connected to the trapped light liquid
discharge line 5, I have disclosed a pump 6 mounted on a
base 7 which is attached to the outside walls of the cham
her 1 as shown. The pump assembly is disclosed in FIG
of the unit.
URE 2 which consists of a motor 21 connected to a power
Another object of the invention is to screen out solid
line 22 with a reversible switch 23. The pump 6 and the
materials which are too large to be processed by the
motor 21 are mounted on a base 7 as shown and con
40 nected together by the coupling shown at 20. It will be
system.
Another object of the invention is to provide a struc
observed that the light liquid discharge line 5 and the
ture whereby the liquid ?ows from near the bottom of the
heavy liquid discharge line 16 are attached to the support
separating chamber at a high velocity evacuating the solids
3 in the bottom of the chamber 1 and the discharge line 5
as a mixture. In the event that the solid materials should
is attached to the support 4 at the top of the said chamber
slow down the velocity, the head of the liquid in the inlet
1. The supports 3 and 4; are attached to the inside walls
opening would rise immediately and the increased pres
of the chamber 1 at opposite sides.
sure would evacuate the solid materials.
The conven
tional ?ow controls is thereby eliminated.
Another ‘object of the invention is to provide a cleanout
Having disclosed and described the invention in detail,
I will now describe the method of initial priming and the
continuous or intermittent operation including the evacua
chamber with a removable cover for the solid materials
tion of the separated liquid. It is obvious that the unit
too large to be processed by the system, the bottom of 50 could be installed at ground level or at a higher or lower
which is above the static level of the unit, so that the
elevation in order that the liquid mixture would ?ow into
cleanont chamber is free of liquid when no liquid is fed
the system from a higher elevation and the heavy liquid
to the system, thereby to simplify the removal of the solid
would discharge into the disposal system at an elevation
materials.
below the static level of the system.
'
Another object of the invention is to provide a below
The installation and operation of the device is simple.
atmospheric pressure separating chamber that may be
The inlet line 8 leading into the system is connected to the
fabricated, tested, and shipped as a complete unit with
supply source of the liquid mixture (not shown), the
the inlet opening for the liquid or liquid mixture and the
outlet line 17 is connected to the disposal system (not
trapped discharge lines for the lighter and heavier liquids
shown), water is now admitted to the system and enters
fabricated inside the separating chamber.
60 the cleanout chamber 9 from the line 8 passing through
Other additional objects, bene?ts, and advantages of the
the holes in the screen 10 ?lling the interior of the cham
disclosed method and means will become evident from a
ber 15 to the static level. The liquid then passes from
study of the following detailed description taken in con
near the bottom of the chamber 15 through the line 14 into
junction with the accompanying drawing, in which:
the bottom of the separating chamber 1. When the liquid
FIGURE 1 is a substantially central vertical section E) rises in the chamber 1 and ‘the discharge line 16 equal
through the main parts of the assembled invention, show
to the static level, the liquid ?ows from the bottom of the
separating chamber through the lines 16 and 17 into the
ing the arrangements of the various par-ts and their rela
disposal system. It will be observed that the motor and
tions to each other.
FIGURE 2 is an elevational view showing the pump
pump is connected to the trapped discharge line 5 for
‘and motor assembled on the base with reversible switch 70 the lighter liquids. The arrangement of the pump shown
and power lines.
in FIGURE lis shown in detail in FIGURE 2. .The re.
3,080,057
3.
4 .
However, should it be necessaryto clean the-unit, ‘the air
versible switch '23 is at the center in off position. "The
and light liquids are evacuated by the pump until the
switch is now thrown to the right to start the motor and
water discharges from the pump.
pump. The air _is evacuated from the separating chamber
forming-a pressure below atmosphere, causing the liquid
to rise (by the action of the externalatmospheric pres
sure) in the separating chamber 1 to the top of the dis
charge-line 5 and when the liquid discharges'freely from
thel'pump, the switch '23 ‘is thrown in the off position to
stop ‘the motor. The ‘below atmospheric pressure cham
ber Iris thusprim'ed-with liquid and the unit is ready ‘for
The pump is now
operated in reverse by throwing the switch to the left and
all ‘the liquid in the below atmospheric zone will be re
leased through the discharge line at the bottom ‘of the
separating chamber at a high velocity. This will cause-‘the
evacuation of all the accumulated solids including sand
or gravel. The liquid in the separating chamber below
10 the static level would be retained and it would not be
necessary to close down the system during the cleaning
operation. During the priming operation, it ‘is impera
operation._ The switch is now thrown to the right to
tive that ‘a su?icient amount of vliquid be admitted to the
evacuate the air and reprime the separator from the stream
system to replace the liquid that displaces the air and
of liquid ?owing through the system as has previously been
liquid evacuated by the pump. The chamber 15 must be
completely ?lled at all times during priming or drawing 15
described.
' The system is now ready for continuous or “intermittent
operation. The body of liquid above the static level is
20
retained in a below atmospheric ‘pressure zone which re
duccs the time lag necessary to separate the lighter im
purities from any liquid which may be admitted to the
system.
’
h
In FIGURES 1 and 2, I have shown a gear pump 6
for the reason that it will evacuate the air and is designed
to pump lighter liquids such as grease and oil. vAny
of the separated light liquid. Any liquid admitted to
the system during this operation over and above this
amount will ?ow into the disposal system.
'
suitable pump may be substituted.
.This makes it possible to produce the complete unit
in three parts which may be installed at the proper eleva
tion and connected together in a simple manner, after
which it would be simply a matter of connecting the inlet
and outlet lines to the unit. This would eliminate errors
Now :if liquid which contains emulsions or other lighter 25
impurities is admitted to the system the lighter impurities
in the installation.
7
heavier liquids and the heavier impurities displaced from
thebelow atmospheric pressure zone along withthe heavier
that which is now claimed as new and desired to be pro~
While this invention has been described with particular
reference to the construction shown in the drawing, it
in the liquid mixture will separate and accumulate at the
is to ‘be understood that the construction is subject to
top of the below atmospheric vpressure vzone where they
change and modi?cation within the spirit and scope of the
are retained in the process of separation as the heavier
impurities continue “to separate from the accumulated 30 present invention as de?ned by the appended claims.
Having completely and fully described the invention
lighter liquid separated from the heavier liquid. The
tected by Letters Patent of the United ‘States is:
1. A below atmospheric pressure separator consisting
bottom of the separating chamber to the ‘disposal system. 35 of a supply line for a liquid or liquid mixture leading
into a cleanout chamber with a removable cover, a sealed
The unit is designed to ‘prevent the undesirable feature
separating chamber, a vortex arresting chamber come
of entraining air with the liquid. The air entrained with
niunicating at the top with the bottom region of the clean
the liquid entering the vortex arresting chamber is sepa
out chamber, a screen in the said cleanout chamber to
rated and passes to the atmosphere through the vent 13.
intercept the larger solid materials, a discharge line lead
Referring to the vortex arresting chamber and air sepa
ing from the bottom of the vortex arresting chamber
rator 12 and‘ 13, it will be observed that the trapped line
and discharging within the sealed separating chamber,
14 leading from near the bottom of the vortex arresting
air vent means communicating with the top of the said
chamber‘as shown at 15 is in a substantially vertical
vortex arresting chamber, a heavy liquid discharge line
position. This feature prevents such an air vortex from
leading from the bottom of the sealed separating chamber
forming and entering the line 14 at the bottom. Whenthe
and elevated to a point determining the static level of
liquid discharges through an outlet extending downward
liquid in the vortex arresting chamber and having an air
or horizontally, it tends to cause a vortex to form and air
vent, a light liquid discharge line leading from near the
to enter the center of the stream of liquid and entrain
top .of the sealed separating chamber to a region near
with the liquid. The liquid ?owing upward inthe vertical
discharge line 14 prevents the formation of such a vortex 50 the bottom of the said separating chamber and thence
extending upward and then through a wall of the sealed
sincethe positionof the discharge line at the surface of the
separating chamber thereby forming a trap, a motor
liquid :is at the point where the vortex would form. In
powered reversible pump connected to the light liquid
some cases it does form and resolves around the discharge
line but does not pass or entrain with the liquid being ' discharge line operable in one direction for evacuating
discharged. Therefore, air is separated but‘ does not 55 the air and lighter liquids from the sealed separating
chamber to form a body of liquid in a below atmospheric
entrain with the liquid .or liquid mixture entering the below
solids contained in the mixture are evacuated from the
ati'nospheric pressure separating zone.
1
However, there is free air or oxygen in the liquid
under atmospheric pressure which is separated by the
zone of separation from a constant stream of admitted
liquid and operable in the other direction to pump air
to the sealed chamber to discharge the heavy liquid at
action of the below atmospheric pressure and accumu 60 high velocity in cleaning the sealed separating chamber
of'accumulated solids. '
iates at‘ the top of the said zone. This accumulated air
2. A below atmospheric pressure separator for the
or ‘gases may he removed by throwing the switch to the
separating of lighter and heavier liquids, comprising an
righti-tostart the motor and pump. The liquid in the
mapped discharged line will be discharged ?rst and the
inlet line to a vortex arresting air separating chamber,
accumulated air separated from the liquid will be dis: 65 a sealed separating chamber, a trapped discharge line
leading from near the bottom of the vortex arresting
charged, after which the accumulated lighter liquid will
chamber and discharging within the interior of the sealed
he discharged and when the heavy liquid appears, the
separating chamber, an air vent line leading upwardly
‘switch is thrown »to neutral. During this operation it is
from the top of the vortex arresting chamber, a-trapped
imperative ‘that a volume oi liquid be admitted equal to
or" greater than the volume of liquid displaced by the air 70 heavy liquid discharge line leading from near the bottom
of the sealed separating ehamber through a wall of the
and liquid removed by the pump.
said sealed separating chamber and discharging at van
‘As thepunit is designed to evacuate the heavy solids
equal elevation to the vortex arresting chamber to main
‘with the heavy liquid discharged and the solids too large
tai’n a static level, an air vent'extending upward from the
to be processed by the unit are arrested byrth’er-non-rei
movable screen the unit should operate trouble tree. 75 heavy liquid discharge line, a light liquid discharge line
8,080,057
5
6
leading downward from the top of the sealed separating
chamber forming a trap at the bottom and extending up
said trap formation extending to the bottom of the tank,
ward through a wall of the said sealed separating cham
ber, a motor driven reversible pump connected to the
top interior region of the tank and extending downwardly
substantially the height of the tank and bent upwardly
light liquid discharge line, supports attached respectively
to form a trap, the upwardly bent portion extending to
at least the height of the in?uent line and extending trans
versely through the wall of the tank, and a reversable
pump attached to an exterior portion of the suction and
pressure line.
a suction and pressure line having an open end in the
at the top and bottom of the interior of the sealed sepa
rating chamber for supporting the lighter and heavier
liquid discharge lines at the bottom and the lighter dis‘
charge line at the top and reversing control means for the
said motor.
10
5. Apparatus for separating lighter and heavier liquids
3. A process for separating a mixture of low and high
from a liquid mixture comprising: a sealed vertically
speci?c gravity liquids which includes passing an in?uent
elongated separating chamber, an inlet line having a trap
stream of the mixture through a zone at atmospheric
formation opening into the separating chamber, a dis
pressure to vent gas from the stream while arresting air
charge line leading upward from near the bottom of the
entraining vortex formations in the ?owing mixture, par 15 separating chamber through a wall of the said chamber
tially establishing a vertically extending column of the
in air tight relation and discharging at substantially the
mixture and then extending the height of the established
same level as that at which the inlet line opens into the
column by lowering the pressure upon the top of the col
tank, a light liquid discharge line leading downward from
umn whereby the rise of the low gravity liquids above
near the top of the sealed separating chamber to near
the high gravity liquids is facilitated, adding the mixture 20 the bottom of the said chamber :and returning upward
to the lower regions of the column, drawing oh? the ac
and passing through a wall of the said sealed separating
cumulating light gravity liquids from the top low pressure
chamber in air tight relation, 2. motor driven reversible
region of the top of the column downwardly to the bot
pump connected to the said light liquid discharge line
tom region of the column and then upwardly to a mid
operable in one direction to evacuate the air and form
region of the column and there effecting discharge of the 25 a. liquid body in the separating chamber to provide a
accumulated light liquid from the column and increasing
the pressure on the top of the column after the light
below atmospheric pressure zone and to evacuate the
from the column at the horizontal level of the ingress
of the mixture to the column.
4. A liquid mixture separator comprising, a vertically
References Cited in the ?le of this patent
UNITED STATES PATENTS
accumulated light liquids and operable in the other di
gravity liquids have been removed from the column by
rection to pump air into the chamber for accelerated ex
applying air pressure upon the remaining part of the
column thereby to elfect discharge of the heavy liquid 30 pulsion of liquid through the discharge line.
extending tank with the top region thereof hermetically
sealed, an in?uent line, an e?‘luent line, said lines being 35
located a substantial distance above the bottom of the
tank, said in?uent line being provided with an inverted
L-shaped trap formation having a vertical trap leg form
ing a part of a vortex arresting means vented to the at
mosphere, the effluent line being also provided with an 40
inverted L-shaped trap formation with a leg of the last
266,204
463,120
860,930
1,045,811
1,052,39l
1,079,398
Roeckner ____________ __ ‘Oct. 17,
Dennes ______________ __ Nov. 10,
Merten ______________ __ July 23,
Buhring ______________ __ Dec. 3,
Valerius et al ___________ __ Feb. 4,
Coakley et a1 _________ __ Nov. 25,
1882
1891
1907
19-12
1913
1913
2,747,736
Mobley ______________ __ May 29, 1956
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