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Патент USA US2120608

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June 14, 1938.~
Filed Feb. 24, 1957
3 Sheets-'Sheet l
June 14, 1938.
Filed Feb. 24, 1957
:s sheets-sheet è
June 14, 1938.
Filed Feb. 24, 1957
s sheets-sheet 3
Patented June 14, 1938
Pitórolt'rloNlNG -Arlnumtrus
David W. Haering, Chicago, Ill.
.Application yFebruary 24, 1937, Serial No. 127,534
e claims. (Cl. zml-31)
'_Thls inventiony relates to the art of proportìoning liquids into liquids in accordance with process
requirements. lWhile many forms of -such apparatus are known to the art, no reliable appara5 tus is believed hitherto to havev been produced,
wherein the _operation is automatic and very
highly accurate. Processing requirements gen_ erally require great accuracy in proportioning
and this has necessitated practically _constant
10 supervision _by skilled operators. The re1ative1y
bodlment of proportioning apparatus particular
ly designed for handling corrosive material.
Figure 5 is an alternative embodiment of the
apparatus arrangement asy shown in Figure 2.
Figure 6 is -an -elevation of an embodiment of 5
proportioning apparatus designed particularly for
the .processing of liquid with a plurality of sepa
rately fed processing reagents.
In all illustrated embodiments of the inven
tien the Various types cf prcpcrtioning. units are 10
complicated character -and somewhat elaborate
shown' as service connected into a ñuid through- n
construction o_f proportioning apparatus generally employed, together with the necessity for
supervision, has proved expensive and detrimen-
put conduit 1 through which, as will be under
stood by those versed in the art, the iiuid to be
processed, generally a liquid, is flowed under pres
15 tal to wide-spread commercial use of proportioning units.
Sure. In all views the inlet or intake side of the 15
through-put fluid conduit is considered to be at
The present invention has as an object the pro- the left while the out-put side is at the right,
vision of economical, automatically operable pro- - _these being respectively the Upstream and down
, portioning apparatus of simpliiied construction
20 adapted for proportioning liquids into liquids in
accordance with processing requirements.
Another object is the provision of proportioning apparatus of s_uch character that is adjust-
able for automatic operation, without supervi-`
25 sion, at any desired proportioning rate and which
is S0 designed as t0 eliminate any possibility of
contaminating the processed liquid with undesirable foreign material even though the apparatus be left in operation beyond the point at which
30 its supply of processing liquid is exhausted.
other objects win be apparent from the de_
The present application is a continuation asy to
all common subject matter of 'the invention
35 shown and described in my prior United States
Patent No. 2,058,309, of october 20, 1936.
The present disclosure constitutes an exposition of 'alternative embodiments of apparatus by
which the invention is practiced. It is to be un-
Stream Sides 0f the conduit.
>'I'l’le DI‘OIJcriiOIliIlg units herein ShOWll and de
scribed are capable of accurately DI’OpOrtioning
practically any soluble chemical compound that
is t0 be fed _as a solution' into a ñuid toA be prec
essed. By way 0f example it isrcinted cut that
the disclosed units are particularly eiiîcacious in 25
the feeding of such chemical solutions as acid,
alum, ammonia, caustics, aluminates, gluccsides,
glucosates, alginntes, síllphates, phosphates, S111
phites, tannates, silicates, Soda ash. hypcchlc
rites, ferric chlorides, and many Others.
The accuracy of Pitct tubes for measuring-rate
of iioW has been 'known for many years, but ef- forts t0 Utilize this Principle in pl‘cpcrticning
,Umts have not preVlcllSly been Successful because
the use 0f diaphragm, DiSllODS and Similar ar- 35
rangements defeated their Own _purpose by plac
ing -i200 great a leed 0I1_ the small ammini? 0f Dres
Sure available and, in addilìicrl, required frequent
replacement in Order ltc prevent leakage. The
. 40 dei-stood that the apparatus may be structurally
present invention 4overcomes the defects of the 40
' prior art in the above respects and is thus enabled
ferent` service conditions and that various to employ the Pitot tube principle. thus making
changes and modifications may be made in the possi-ble extreme accuracy. The pressure diiîer- _
structural details to any extent not inconsistent ence between Pitot tubes is prop_ortional to veloc'
ity head and the present invention makes use of 45
altered in desired respects for adaptation to dif
with the scope of the invention as claimed.
In the drawings,
re 1 i
' s s
¿n elevation
this pressure difference directly and without loss
o _ er
for the automatic operation of the unit.
N The proportioning unit shown in Figure 1 com
form of proportioning apparatus constructed 1n » mises a single receptacle such as a tank s smb
50 accordance with the mf’enti‘m'
' Vably supported by any appropriate means,-not 50
Figure 2 is an elevation of another form of an
Figure 3 is an elevation 0f still vanctherhfcrrn
of proportionlng apparatus.
shownI and having a closed top g and a_ closed
-bottom l0, it being further provided at one side
with a conventional sight gauge' Il of the usual
- glass tube type. In service the upper portion of
Figure 4 is an elevation of an alternative em- ` the tank is in _open communication with the input 55 I
side of the conduit 1 by means of a riser pipe II'
suitably connected into the conduit 1 at its lower
end and having thereon an upstream directed
piston liquid 26 is of a higher speciñc gravity.
than the main throughput liquid, the throughput
liquid will remain superposed upon the piston
Pitot tube inlet member I2. Externally of the ~ liquid as indicated in Figure l- wherein dotted
conduit and adjacent thereto the pipe II’ carries line 21 denotes the bottom level of the throughput
an indicator I3 ñxed to the pipe to lie in a com
liquid admitted through the pipe Il'. The valve
mon vertical plane with the Pitot inlet I2 provid
Il is set at the proper adjustment for whatever
ing a ready means indicating the position of the rate of proportioning is selected. Next in order
latter. Above the indicator I6 the pipe Il' is the valve 2l is opened whereupon, as will be ap
further provided .with a needle valve Il of a
parent, the flow pressure of the main through 10
known type of indicating valve by which the flow
put liquid 21 acting downwardly in the tank upon
through theepipe II’ may be regulated to~any
the body of piston liquid 26 will move the liquid
desired rate by appropriate setting of the valve.
piston stratum 26 downwardly towards the re- '
Between the bottom of the tank and the regulator
15 valve I4 the pipe II' is further provided with a
three-way valve I5 from which leads a drain pipe
I6. The pipe II' is continued upwardly through
the bottom of the tank and opens in its upper
portion at a point spaced slightly below the top 6.
Extending downwardly through the top of the
tank is a reagent supply pipe I1, controlled by a
valve I6, and leading from a source of supply I9.
'I'he reagent supply pipe I1 opens into the bottom
portion of the tank at a point spaced slightly
25 above its bottom III. A reagent discharge pipe
agent solution 25 out through the discharge pipe
bottom substantially flush therewith and extends
vertically between the -tank bottom and the
state. vThe operation is entirely automatic and
through-put conduit 1, being suitablyconnected
at predetermined intervals to note the drop in
the reagent level as indicated in the sight gauge
II. When the sight gauge indicates that~ the
liquid piston 26 is at the bottom of the gauge
20 and discharge Pitot tube >22 into the main 15
throughput liquid :flowing through the conduitï‘l
at a rate of feed determined by the- setting of the
valve I4.
The piston liquid 26 being immiscible with
either the main throughput iluid or the reagent
solution and chemically «inert with respect to
bot-h, acts very eifectively as a barrier preventing
any possibility of contact between reagent s_olu
tion and the main throughput liquid within the
tank so that the reagent is fed into the flow
26 controlled by a valve 2I opens into the tank _ stream in the conduit 1 in a pure unadulterated
30 thereinto on the downsteam side and carrying at
its lower end within the conduit a Pitot tube out
let member 22 directed downstream. The pipe
26 also carries an indicator I6 aligned with the
Pitot outlet 22. The tank is further provided
35 at its top with a pipe 26 controlled by a valve 26
and opening into the upper end of the tank for
a purpose to be described.
Assuming all valves Ato be closed the tank is
charged by opening the valve 2l and supplying
40 through the pipe 26 to the interior of the tank a
charge of a liquid 26 that is chemically inert
both with respect to the main through-put liquid
in the conduit 1 that is to be processed and a
particular reagent solution to be employed. 'I‘he
liquid 26 is designed to function as a liquid piston
and it is of such composition that it has a higher
speciñc gravity than the main through-put liquid
in the conduit 1 and a lower specific gravity than
the particular reagent solution employed. The
50 piston iluid 26 is also given a distinctive color so
that in the gauge glass Il it maybe sharply de
flned visually. The addition of coloring mate
rial is not necessary where the character of the
piston liquid is such that it is readily distinguish
55 able from the main throughput fluid and reagent.
The piston liquid ’26 is allowed to collect on the
bottom of the tank until the desired quantity has
been fed thereinto whereafter the valve 26 is
Y closed and the valve I6 `is opened to allow a
60 supply of reagent solution from the source re
ceptacle I9 to flow by gravity through the pipe I1
onto the tank bottom displacing the piston liquid
' 26 which rises as a superposed stratum on top of
the reagent solution 26. When the reagent solu
65 tion reaches the desired height in the tank, as in
dicated in the gauge glass II, the valve Il is
closed and the valves I6 and I6 are manipulated
to allow the throughput liquid in the conduit 1
to rise kthrough the Pitot tube inlet I2 through
70 the riser pipe II' to ñow into the upper portion
of the tank onto the top of the piston liquid 26 ,.
under the pressurevexisting in the flow line 1.
no supervision is required other than observation
glass the observer will be made aware of the fact
that the tank is ready for a renewal of the re
agent solution charge. -
In recharging the valve I6 is manipulated to
open the upper portion of the pipe Il' to the
drain line I6 and to'close the pipe against inlet
of liquid from the ilow conduit 1. The valve I6
is opened to allow a fresh supply of reagent to
flow into the bottom of the tank beneath the
liquid piston 26. As the level of the reagent solu
tion rises in the tank the piston 26 forces ahead
of it the liquid previously delivered from the iiow
conduit 1 which is drained back through the pipe
II' into the drain line I6 until the level of the
reagent solution reaches the desired point as in
dicated in the sight gauge II. At this point the
valve I 6 is closed and the three-way valve I5 is
returned to its normal position to close the drain
line and open the riser pipe II’ whereupon the
operation is at once resumed and continued until
a further recharging is necessary.
In the embodiment of apparatus shown in
Figure 2, the receptacle means comprises two
compartments, here shown as tanks 26 and 26,
the tank 26 being of greater capacity than tank
26. For practical purposes it has been found
desirable to make the tank 26 substantially
twenty-five per cent larger than the tank'26, for
the purpose to be described. The two tanks are
appropriately supported by suitable means, not .
shown, so that they are associated as a unit.
Thetank 26 is provided with a closed top 66 and
a closed bottom 6I both being outwardly dished
to facilitate air venting and blowing down for'
cleaning the interior in the event that sedimenta
tion makes this desirable. ` A drain pipe 62 con
trolled by a valve 66Aleads from the tank bottom
6I. The tank 26 is equipped with`a sight gauge 70
glass 66 and is further provided with an airvent
Thus the upper portion of the tank becomes
66 of a known type locatedât the high point of
the top 66. In'thisembodiment -of proportion
entirely ñlled with the main throughput liquid
mg una the riser l1' carrying the Punt inlet lz ' -
from the conduit 1
due to the fact that thev in the upstream side of` the main throughput 75
conduit 1 connects through a globe valve 33 with extension 53' having its lower end portion hori
an inlet riser 31 that communicates at its upper zontally directed into and through the inlet aper
end through the connection 38 with the interior ture of the bottom connecting nipple 53 of the
of the tank 28 slightly above its bottom 3| and sight gauge 48, the extension 53' terminating in
beneath the bottom connecting nipple 33 of the the nipple 53 in the axis of the gauge glass and
gauge glass 34. In order to facilitate various op
at its lower end.
erations of cleaning, dismantling and the like the
The tank 23 prior to operation of the unit is
intake pipe 31 is further provided with a second entirely filled with reagent solution from the res
globe valve 43 disposed adjacent the connection ervoir 5| until it overflows through the vent 45
10 38 and between the two globe valves 36 and 43 whereupon the vent is closed together withthe
the intake is further equipped with a check 'reagent supply valve 53. In this embodiment of
the proportioning unit the oil selected as the pis
Valve 4I.
In this unit the tank 28 prior to operation of ton liquid must be chemically inert, immiscible
the apparatus is entirely illled with an inert min
with water and aqueous solutions of all kinds,
V15 eral oil supplied thereto through a filler conduit particularly immiscible with the through-put liq
42 having a control valve 43 at the top of the , uid and the reagent solution, and must be of a
tank. A It should be mentioned here that in'ñlling color distinctive with respect to the treated and
the tank 28 the oil is permitted to rise until it ` treating liquid. -A suitable liquid for such pur
overflows through the “air vent _35 which is then _ poses is a chemically inert saturated hydrocarbon,
such as a mineral oil, having a specific gravity
closed together with the valve 43.
The tank 29 has also a closed top 44 provided less than l and colored- preferably a deep red. ’
In operation the valves between the now con
at its high point with an air vent 45, and a closed
bottom 46 provided with a drain plug 41. The duit 1 and the bottom pertions of the respective
ends of the tanks are. outwardly dished as in the ' tanks n28 and 23 are opened whereupon a portion
case of the tank 28 for similar purposes. The of the through-put liquid in the conduit 1 is taken
tank 23 is also provided with a sight gauge 48 up by the Pitot tube I2 and rises under pressure
having its top and bottom connecting nipples 43 through the pipe 31 into the bottom portion of
and 53‘ disposed respectively in horizontal planes the tank 28 in which it collects upon the bottom
and being of a higher speciñc gravity than the oil
common to-'the top and bottom connecting nip'
ples of the sight gauge 34 located on the tank 28. within the tank it gradually forces the oil up@
It" should' further be noted. that the two tanks wardly out of the tank through the oil pipe 53 at
are so arranged that their respective bottoms 3|
a rate of flow controlled by the setting of the
and 46 occupy a common horizontal plane as do needle valve 63, ino the tank 23 through the ex
tension 53' to the bottom of the sight gauge glass
likewise their tops 33 and l44.
The tank 29 is adapted to contain the reagent 48 whencel it rises as drops ilowing upwardly
through the gauge glass and through the upper
solution to be fed into the main through-put liq
uid passing through the ilow conduit 1. At a connecting nipple 43 into the top portion of the
tank 23. As the oil is of a lower specific gravity
'. suitable location above the tank 23 there is î‘dis
_than the reagent solution contained in the`tank
containing the appropriate reagent iluid and 23, it will of course collect at the top of the tank
from which the reagent is fed through the supply » and under the inlet pressure will gradually forcepipe 52 equipped with`a control valve 53 down
the reagent down in the tank 23 and out through
wardly through the Atop of the tank into its bot
Ythe discharge pipe 54 into the downstream side of
torn portion, the lower open end of the reagent the through-put conduit 1. 'I'he ratel at which
supply pipe 52 terminating adjacent the tank the drops of the distinctively colored piston liquid,
bottom at substantially the horizontal plane of which is the oil, rise through the tube 48 affords
the sight gauge connecting nipple 53. 'I'he re
a visual indication of the rate of proportioning
agent solution from the tank 23 is discharged feed of the reagent solution.
posed a source of supply such as a reservoir 5i
into the through-put conduit 1 on the down
_ As the level of the incoming through-put ñuid
stream side by means of a discharge pipe 54 con
nected at its lower end with the downstream con
.entering the tank rises therein it indicates, of
nected Pitot outlet tube 22 and opening at its top
through the connection 55 into the interior of
the tank slightly above its bottom and just below
55 the horizontal plane of the connection nipple 53
at the bottom of the sight gauge 4,8'. The reagent '
discharge pipe 54 is provided with upper- and
course, on the sight gauge 34 and when the disq -
tinctively colored oil is no longer visible at the
topjv of the sight gauge 34 an attendant is made ~
Aaware of the fact that the time is approaching
for recharging the unit with reagent solution.
To eßect a recharge the necessary valves are
closed at the bottom portions of the unit and
lower globe valves 56 and 51 and with a check the transfer valve 32 in the line 3| is opened ‘
valve 58 located between the two.l The check together with the drain valve 33 and the re
valves 4I and 584 act to prevent any possibility - agent supply valve 53. Under the hydrostatic
of a flow reversal' through the _system of the unit. head of the reagent solution entering through
The two tanks 28 and 23 are connectedV at their the pipe 52 the reagent as it enters the bottom
tops 33'and 44 by means of an oil 'flow pipe 53 of the tank 23 forces the contained oil back
equipped with 'a self-indicating needle control through the transfer pipe 6I into the` top-of the
valve 60 identical to the needle control valve I4 Q tank 28, the portion of the throughput liquid con 65
described in connection with the embodiment tained in the tank 28 draining from the bottom
shownin Figure 1 and having the same lfunction through the drain pipe _32. When the sight
of determining the rate of feed of the reagent gauge 34 on the tank~23 shows that it is ñlled
with theV distinctively'colored oil, the attendant
from the unit. The two tanks are further con
70 nected at their upper ends by a transfer pipe 8| _ knows that the vrequisite recharge of the re-. 70
opening at its ends into the respective tank tops agent solution has been supplied to the tank 23.
33 and 44 and equipped with a control valve 32. The transfer valve 62 is then closed together
The oil pipe 53 does not discharge directly into with the drain valve'33 and the reagent supply
the upper end of the" tank 23 but is continued valve 53 4and the valves controlling the pipes 31
75 downwardly through the top of the tank by an and _54 are opened- so that the u_nit resumes an 75
automatic operation in_the manner previously poses“ and the top 11 is provided with an air
described. In this recharging operation it will
be noted that it is not necessary to disturb the
~ setting .of the control valve 60 in any respect.
As vpreviously stated herein, `the reagent tank
29 is preferably made at least twenty-five per
cent larger than the tank 28.v Due to this differ
necting nipples 8| and 82 entering the tank in
horizontal planes common to the nipples 69 and
ence in size it is impossible for the through-put
18 of the tank 63. The treating solution or re
agent is discharged from the upper end of the
liquid passing through the flow conduit 1 to be
tank 64 through discharge pipe 83 extending
10 \come contaminated by the oil even though the
down through the tank bottom into connection 10
unit be left in operation and unattended for a
with the Pitot tube outlet 22 on the downstream
long period of time, far beyond the point at which
the reagent solution charge of the tank 29 is ex-.
hausted.4 This safety control feature arises from
side .of 'the main ñuid through-put conduit 1.
The pipe 83 is equipped with a globe valve 84 and
between the _valveand the bottom of the tank
there is also provided a check valve 85, to prevent
flow reversal in the line.- The treating solution
or reagent is supplied to the tank 84 through
the supply pipe 86 opening through the top 11
and controlled by the valve 81.
In this embodiment the piston iluid is heavier
than the reagent or the main through-put vfluid
so that it necessarily gravitates to the bottom in
each tank. With the unit in operation the
through-put iiuid enters under pressure from the
Pitot inlet I2 rising through the inlet pipe 1| to
the upper portion of the tank 63 wherein it dis
places the piston iìuid in the bottom portion of
the tank which in turn rises through pipe 88 ex
tending down through the top of the tank 63 to a
point adjacent its bottom and which pipe con
nects with the tank 64 at its top 11, the rate of
passage of the piston fluid through pipe 88 being
controlled by the indicator needle control valve
89 similar to the valves |4 and 60 previously de
scribed and having the same function. The pipe
88 does not open directly into the tank 64 but is
continued therein as an exten‘sion 88’ horizon
tally directed through the top portion of the tank
to extend into the nipple 8| of the sight gauge 80
and opening therein in the axis of the sight gauge
tube. As the piston fluid is forced through the
pipe 88 and its extension 88' it discharges in the
nipple 8| at the upper end of the gauge glass of
the sight gauge 80 whence it passes down there
through inv drops which enter the bottom por
tion of the tank 64 through the lower connect
ing nipple 82. As the piston fluid is heavier than
the reagent solution containedl in the tank 24 it
VVforces the reagent solution upwardly within the
`tank to discharge from its upper end down
through the outlet pipe 83 to the main through
put conduit 1 on the» downstream side, the rate
of feed being controlled by the setting of the valve
88. A transfer pipe 99, controlled by valve 9|,
connects the two tanks at their bottoms.
When the sight gauges indicate the necessity
for a recharge of the treating solution in tank
64 the appropriate valves are manipulated to al
the fact that as the oil comprising the piston liq
uid is of lighter specific gravity than the main
through-put liquid from theoflow conduit 1, if
all of the oil contained in thë tank 28 should
be discharged into the tank 29 it will fill the
20 tank and as the operation is continued follow
ing exhaustion of `the reagent solution charge
in the tank 29, the main through-put liquid en
tering through the oil pipe 59 and the extension
_. 59' following the oil will back flow through the
25 lower connecting nipple 50 ofthe sight gauge 48
into the bottom portion of the tank 29 remaining
beneath the body‘of oil in the upper portion of
the tank so that .in the continued operation of
the unit it passes nothing but the liquid passing
.30 through the system from the ñow conduit 1.
Due to the fact that the control valve 68 has no
portion extending above the filling level of oil
in the tank 28, as determined by the vent v35, it
is vobvious that in the normal operation of the
85 unit nothing but oil ever passes through the valve
6|!-` Consequently, it cannot corrode or become
clogged so that its control setting functions ac
curately at all stages of the operation of the
The embodiment of proportioning unit shown
in Figure 3 is particularly designed for feeding
oils and organic solvents into gasoline, oil or
gas lines. It is applicable also to proportioning
systems for introducing dyes into oil or gasoline
45 and for introducing oil into gas. In this em
bodiment the unit consists of two tanks 63 and
64 suitably supported by appropriate means, not
shown, the tank 63 having a closed top 65 and
a closed bottom 66 outwardly dished to facilitate
`50 cleaning where
necessary. The top _65
equipped at its high point with an> airvent 61
and is further provided with a sight gauge 68
having connecting nipples 69 and 18 entering
_the tank respectively from the upper and lower
55 ends of the sight gauge tube at horizontal planes
- spaced somewhat from the top and bottom of
thetank. In this embodiment the main through
put or flow conduit 1 through which flows the
particular fluid to be treated has its riser Il'
60 carrying- the Pitot tube I2 connected to the ver
d.tically upstanding inlet pipe 1| which enters
through the tank body 66 passing upwardly to
discharge into the upper end of the tank slightly
below the~ top 65. The inlet pipe is further pro
85 » vided with a globe valve 12 and above this >with
„ a three-way valve 13 communicating with a drain
pipe- 14. Also, at the top of the tank 23 is con
` Y V'nected'a piston- iîuid inlet pipe.1_5_ having a con
trol valve 16.-
vent 19 at the level of the air vent 61 on the
tank 63. Tank 64 is likewise provided with a
sight gauge 8|) having its upper and lower con
'I‘he reagent tank 64 is substantially twenty
iìve per cent larger than the tank 63 and has a
closed top 11 and a closed bottom 18 located in
low a fresh supply‘ of reagent to enter the tank
64 through the pipe 86, the three-'way valve ‘13
being open to the drain 14 so that the inlet pres
sure of the reagent supply forces the piston fluid
back through the transfer pipe 98,- the valve 8|
being opened for the purpose, into the tank 63
>wherein it replaces the through-put fluid in the
upper portion of the tank down through the pipe1| through the drain 14 until> the requisite
amountpf reagentsolution has been recharged
-int'o thefitank 64. 'I'he valves are then manipu
lated to set the unit again in operation in the 70
_manner previously described.
Many of the materials used in'processing fluids
respective horizontal planes common' to the .top
are very corrosive to th Akcommon metals and
and bottom of the tank 63. ,p The ends of uthe
this is particularly true
75 _- tank 64 are outwardly dished for cleaning pur
vtlf-ie hypochlorite s'olu
tions used for sterilizing water. supplies- A pro 75,
portioning unit particularly designed for han
embodies the principles of the units previously de
dling con-cave material is shown in Figure 4 and scribed but in a much more simplified structural
consists“ of two appropriately supported tanks Il arrangement. In this unit the two tanks lil and
‘2l are appropriately associated by supporting
disposed with their opposite ends occupying com
means, not shown, with their tops and. bottoms
mon horizontal planes and with the reagent solu
tion tank Il being substantially 25 per cent larger occupying common horizontal planes and with
the reagent solution tank ill being approximate
than the tank $2. In this embodiment the re
agent tank, being designed to handle corrosive
fluids, is rubber lined and hard rubber valves and
fittings are employed wherever contact with the
corrodve reagent is possible. This unit employs
the heretofore described oil as the piston ñuid
which is supplied to the tank i2 through the sup
ply pipe 8l having a control $5 and opening into
the top of the tank. At the bottom of the tank a.
drain pipe Si having a control valve Sl is pro
vided for draining and recharging the unit. From
the high point of the
22 a vent pipe n ex
tends upwardly having its upper end provided
with an air vent S1 located at a point higher
than any point in which there is any transfer be
1y twenty-five percent larger than the pipe Hl.
Each tank- is provided at its top with an air vent
liti and the tank [(9 is designed to carry the dis 10
tinctively colored oil embodying the piston fluid
which is supplied at the top of the tank through
the inlet fitting |22. In the reagent tank £20 the
reagent is supplied through the inlet iitting |23
through which the reagentis supplied into the
bottom portion'of the tank. The tanks are in
open communication across their tops by means ,
of a pistou fluid conduit l2( equipped with the
indicating needle control valve [25 identical with
the indicating needle control valve previously de-scribed and having the same functions of regu
tween the respective tanks. The through-put lating the rate of proportioning feed of reagent
liquid in the main through-put conduit 'l risesA from the tank £20. The tank lll is provided with
through the impact of the Pitot tube [Z through v a drain pipe [26 controlled by a valve £21.
the intake "I which opens into the bottom por
tion of the tank 92 through the connection lill at
a point slightly above the horizontal plane of the
bottom connecting nipple lli of a sight gauge [03
carried by the tank and having its upper inlet
nipple i“ entering'> the top portion of the tank
In this unit the tank MS isV equipped with a
sight gauge in and the through-put fluid en
tering from the impactI Pitot tube i2 in the ilow
line l rises under the flow pressure through the
inlet pipe £29 into the bottom portion of the
tank through the connection l". The inle't pipe
at a point slightly below its top. The inlet pipe
lll is provided with spaced globe valves N5 and
l2! is continued through the tank i i! as an ex
tension [29T which
continued into and opens
lli between which is disposed a check valve lill.
Within the tank Q2 the inlet pipe ill is con
as an extension ill' horizontally directed.
in the upper portion of the tank to extend into
gauge t28 in the am's of 'the gauge tube. The
reagent tank [2li discharges from its bottom por
tion through the connection E32 to the reagent
the sight gauge connecting nipple ill to open
therein in the axis of the sight gauge glass. In
this unit the piston duid ia lighter than. either the
main through-put fluid orl the particular* corro
sive reagent employed and as the through-put
in the upper connecting nipple ilïi of the sight
discharge pipe i3! controlled by the valve ill( and
in communication with the discharge Pitot tube
2i on the downstream side of the through-put
conduit 'L The intake pipe in is provided with
a globe valve £35 and with a. check valve [It
In the operation of this unit as the through
duid enters throughthe- inlet lill’ it passes down '
' through the sight gauge glass i131 in the form of put fluid runs through the intake [2li it discharges
drops entering the tank IZ at its bottom portion trom the »extension in’ into the upper connect
and collecting
to forcef'the piston duid ing nipple lli of the sight gaugey on the tank
out of the top of the tank through the piston fluid il!` whence it passes in the form of drops down
conduit “Il at a rate of
which is regulated wardl'y through the sight gauge glass: into the
by the indicating needle control valve il! in the » bottom portion of the tank and displaces there
trom the body of the piston fluid, which is the
line [lli which valve iaidentical to the needle con
distinctively' colored
which passes through the
trol valve
described and which per
control of the valve mi
f forms the same function. As the piston fluid is, conduit- Ilii- under
of the reagent tank in
the line lill; it enters at the top intd the ton
of the tank i@ and
the corrosive reagent whence it dlsplaces _a proportionate amount of
discharging: same
the connection HI? to
pipe Mil controlled hy the globe
valve M2 and
the Pitot discharge
tube Z1: located on the down-stream. side of the
conduit I.
corrosive reagent is supplied. to
at its;
portion by means; of the
the reagent,
the,` same
discharge pipe il@ Into the through-put conduit
on the downstream side.
unit. the recharging
recharging' in this
elected by back
through> the line Mlm the drain lîlîl being 09€!! for the purpose.
The proportioning unit shown in Figure d B
designed for proportionlng two dliIerent reagent
Supply and ccnt'rolledby thevalve Hl. The tank solutions
simultaneously. It» is particularly ef
Si iss provided atthe
with am air vent M5 and
íective for
processing problems requiring twin
vat its
with a
plug tw.
handle the feeding of soda aan
' Áil transfer pipe tlìl" controlled by' a valve lill ¥ establishes communication between the tops of and alum, soda ash'and sodimm aluminate, am
monia and hypochlorite., tannin and phosphate‘
the tanks: 92 and Si so» that in a> recharging op
and caustic sodaw ferrie sulphate and soda
l2 through
the the
MI., flows
‘It is;back
into the
to note ash, and various other combinations.V Sodium
here that;
of the vent „i at the high sulphite may be fed in this unit in conjunction
of the _system precludesI any possibility with pH adjustments or' water softening chem 'IO
of the
“d and HT and the control valve il!
In this unit the piston fluid kV preferably the
MU from handlinganything other
distinctively colored chemically inert oil previous
I than the piston
which is', of course., non-cor
\ inlet pipe IEW)
a 'suitable source of
'.Ehe _
in Figure 5
mi, il@ and iii, the
te tank ill being
filled with the piston fluid until it overflows
the reagent solution the input iluid‘isnot passed
through the air/veut -|40 located in the top of
this tank. Each tankV is respectively provided
through the piston fluid. It is known to 'the prior
with a sight gauge these being indicated as at I4 I ,
two iluids in the art ofV proportioning butin such
known instances or the prior art there is an ever
present possibility of contamination due to the
fact that in the said prior art practice the input
fluid is passed'through'the piston fluid and the
:piston fluid is in turn passed through the reagent
solution. Thus it is >.possible for considerable 10
contamination to occur by the transfer of impu-_
|42 and |43, the two end tanks being also pro
vided with valve controlled drains IM. Each of
the tanks |31 and '|39 isñlled with a different
type of reagent the same being supplied thereto
through the valve- controlled supply pipe' |45
which extends downwardly into the bottom por
tions of the respective tanks. 'I‘he end tanks are
also equipped with air vents- IIS. In this em
bodiment the through-put fluid conduit 1 has one
impact Pitot tube I2 directed upstream' and `con-`
15 necting with an' intake pipe |41 entering the bot
tom portion of the central tank |38 through the
connectionV |48. This intake pipe is provided with
a globe valve |49 andwith a check valve I 50.
Each of the tanks |31 and |39 discharges its re
'20 spective reagent solution from its bottom portion
through a connection |5| to the discharge pip'ël
|52 equipped with a globe valve |53 and com
art to utilize an intermediate iluid body between
rities and foreign matter from one body to an
other as they are successively commingled in the
'operation of the apparatus.y
-' 1. A proportioning apparatus comprising- in
combination with a iluid through-put conduit, a
closed receptacle, an inlet pipe between the bot
tom portion-of said receptacle and the conduit,
a second receptacle having a capacity in excess 20
of the capacity of the first receptacle, means for
supplying a treating iluid to the second recep
tacle, a pipe between the upper ends' of said
municatìng with the discharge Pitot tube 22 in
the through-put conduit 1 and directed down ' receptacles and communicating at the top of
stream thereof. The respective tanks |38 and cach, a valve in said pipe for regulating by pre 26
|39 are in open communication between their
determined adjustment the rate of passage of
'tops by. means of a piston ñuid conduit I 5l fluid therethrough betweensaid receptacles. ,a
equipped with an indicating needle. controlled treating ñuid outlet pipe between the bottom of
valve |55 similar to the one previously. described saidv secondreceptacle and the conduit,l and a
and having the same function. For recharging body of liquid in- the receptacles between the .30
purposes the tops of these two- tanks are in com
through-put fluid fand the treating fluid, said
munication by means of a transfer pipe |56 con
body of liquid being chemically inert and im
trolled by a valve |51 so that -in the recharging miscible relativeÍ to the through-put fluid and
operation the setting of the control valve |55 the treating fluid.
' l
need _not be disturbed. Between the respective
2, A proportionlng- apparatus comprising in 35
tanks |38 and |31 the same system lies,- the two combination with a -i‘hrough-put- ñuid conduit,
tanks being .in open communication at their tops a receptacle, a through-put fluid inlet pipe be
by a piston fluid conduit |58 having the indicating tween said conduit and one end of said recep
needle control valve |59 for regulating the rate
40 of feed. These two tanks- are also provided with
a piston fluid transfer pipe |60. controlled by a
valve |6| for effecting a recharge.
tacle, a second receptacle, a treating iluid dis- `
charge pipe between said conduit and one end
of said second receptacle, a =b0dy- o1' treating
y _
in said Asecond receptacle,_ a pipe establish
The operating principles of this unit 'are the fluid
ingcommunication between said receptacles, a
same "as those of the previously described units val‘ve means adjustable to determine the rate of
45 except that by’proper manipulation of the con
flow through said pipe, a second pipe establish-,
trol valves |59 and |55 the two different reagent ingi communication between said receptacles at
solutions may be fed independently at different another point, valvel means in said second pipe,
rates of speed. The principle is the same in that and a body of liquid completely filling said recep
the through-put fluid enteringthe central tank -tacles and first-named pipe between the through- ’
the intake |41 under the pressure in put iluld and thetreating Huid.
so the conduit
1 displaces the piston fluid therein
3. A proportioning apparatus comprising in
which passes through the respective conduits combination with a fluid through-put conduit,
|54 and |58 into the reagent containingtanks a closed receptacle, an inlet pipe between the
for displacing the reagent solution contained through-put conduit and one end of said recep
-55 `therein through the discharge pipes |52 into the
tacle, a second and largerA receptacle having a 55
down-stream side of the through-put conduit.
capacity in excess of the capacity of the «ilrst
Attention is directed to the fact that in all em
receptacle, means for supplying a treating iluid
bodiments of the> invention the requisite pressure
for feeding the reagent solution is insured to one end portion of said larger receptacle, a
pipe establishing communicationbetween said
through a fluid piston, that is,k a body of ñuid receptacles
at substantially opposite end portions 60
material separates the main through-put ñuid of each, a valve in said pipe and adjustable to
from the reagent at all times and such body of determine the rate of ñow therethrough, a body `
material,` by reason'of its- ñuid nature operates~ of liquid ñlling'said receptacle and pipe at all
to transmit pressure equally over the entire en
times between the through-put :duid and the‘
05 gaged area of the reagent solution. Being a treating ñuid, and means for transferring the
ñuid body it is essentially mobile and instanta
ñuid from one tank into another independently
¿neously self-conforming to every surface irregu
of said valve controlled pipe.
. '
larity and without hindrance to the transmission
4. A proportioning apparatus comprising in
of preœure. It is important to observe that in
combination'with a through-put fluid conduit,
a pair of closed receptacles having their-tops and
70 no case is there possibility of contamination be
tween the respective'iluids for in those instances bottoms arranged in common horizontal planes,_`_
wherein the input fluid is passed through the one of said receptacles being larger than the `
piston fluid, the piston ñuid does vnot pass other, a sight'gauge on said larger receptacle and
through' thel reagent solution, and in those in-' 1havingconnecting nipples opening to the inte
75 stances where the- piston iiuid- is passed through rior thereof at the top and bottom of the gauge,
means for supplying through-put fluid under'
pressurefrom the upstream side of said conduit
said connecting pipe adjustable to determine the
to one end of the smaller receptacle, means for
rate of ñow therethrough, Vent means carried by
said smaller receptacle at a point above the hori
supplying a charge of treating iiuid to said
larger receptacle at the lower end thereof, means
zontal level of said pipe connecting the two re
ceptacles, and a body of liquid filling said recep
for discharging treating -fluid from said 'larger - tacles and pipe at _all times between the through
put fluid and the treating- fluid, said body of
receptacle to the downstream side of said con
duit, a pipe between said receptacles and opening liquid being of a speciñc gravity diiîering from
into the top of said small receptacle, said pipe Athat- of the through-put iluid and the treating
having an extension in said larger receptacle and fluid ‘and being chemically inert with respect to
terminating-in the lower connecting nipple of f'
said sight gauge, a valve in said pipe adjust
_able to determine the rate of ñow therethrough,
6. A proportioning apparatus comprising in
combination withA a `through-put iluid conduit, a
and a body of liquid ñlling said receptacles at - plurality of closed receptacles, an inlet pipe be
15 all times between the through-put :duid and the tween the upstream side -of said conduit and one 15
treating fluid, said body of liquid being of a end of one of said receptacles for admitting
specific gravity diifering from the treating iiuid .- through-put fluid thereto under pressure, means>
and the4 inlet* fluid and ychemically’ inert wit
for supplying individually different treating fluids '
to the remaining receptacles, feach said remain
respect thereto.
i ‘
5. A proportioning apparatus comprising ix‘L ing receptacle having a treating iiuid discharge 2o4
combination with a through-put ñuìd conduit, a pipe connecting the 'bottom thereof with the
-receptacle, an inlet pipe communicating between downstream side of said conduit, pipes establish
the upstream side of said conduit- and one end ing communication between the top of said first
portion of said receptacle, a second and larger named receptacle and, each of the remaining
receptacles, valves in said communicating pipes
receptacle, means for supplying a charge of treat
ing fluid into said larger receptacle, a< _treating and adjustable `to determine the rate of flow in
iluid exhaust pipe communicating between an. dividually through each, and a body of liquid
end of said larger receptacle andthe downstream completely filling the space between the through
side of said conduit, a pipe between said recep
30 tacles and communicating at one end to the end
portion of said ñrst receptacle spaced fromv the
discharge end of said through-put fluid inlet pipe
and at rits other end passing through said larger
receptacle to discharge therein at a point remote
35 from the treating ñuid discharge pipe, a valve in
put fluid, in said ñrst receptacle and the respec
tive treating iiuids in the ~remaining‘receptacles
and said-connecting pipes, said. body of liquid
being 'chemically inert with respect to the
through-put iiuid and the various treating ñuids.
` and immiscible with any.
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