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Патент USA US2105435

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vJan. '11, 1938.‘
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Patented Jan. H, 3938
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‘2,105,435
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METHOD .or am» APPARATUS roa FRO ST
ELIIVHNATION
Tanner
and Ernest Watkins, St.
Charles H.
Cloud, Minn; Jessie M. Tanner administrator
of said Charles H. Tanner, deceased
Application June 2, 1934, Serial No. ‘728,783
9 Claims. (Cl. 138—32)
This invention relates .to the prevention and valve ll being positioned in line IE to permit,?0w
elimination of frost deposition in gas’ lines and
more particularly to an apparatus and a method
for eliminating frost in compressed air, natural
5)
and arti?cial gas as well as other gas lines.
In Patent No. 1,802,683 issued April 28, 1931 to
one of us, a method is disclosed whereby deposi
tion of frost in compressed airlines may be pre
vented. The present invention relates to an im
0 proved apparatus and method adaptable for use
in conjunction with gas lines of all kinds where-‘
in the gas contains some proportion of water
of vapor from the container to the line..
A suitable heat exchanger is shown at l8 and
may comprise any suitable form of heat exchang
ing apparatus such 'as the gas heater shown, al
though any other form of heating apparatus such
as oil. or electrical heating unit may be employed.
Where the device of this invention is used in con
junction with arti?cial or natural gas lines, heat 10
is provided in the heat interchanger by tapping
the gas line as at l9 and leading the desired
quantity of fuel through fuel line 20, regulated by
vapor capable of depositing as frost upon a suf- _ valve 2|, to the burners 22 of the heat inter
?cient diminution in temperature.
15
I In the drawing:
Fig. 1 shows a side elevation with certain por
tions in section of one form of apparatus compris
ing the invention, and
Fig. 2 is a section in line II-II of Fig. 1.
Referring more particularly to the drawing, a
20
line or main carrying gas, such as air, arti?cial
or natural gas or other gas containing adven
titious quantities of moisture. is shown generally
‘at 5 with means provided at 6 for admitting a
vapor functioning to lower the temperature at
which a given mixture of water vapor and other
gas will deposit frost, as described more fully
hereinafter.
'
'
'
For generating the frost preventing vapor, a
30 liquid container ‘I is provided of ,any desired type
and size depending upon the quantity of materials
to be contained, generally constructed of. metal
and provided at its upper portion 8 with the up
wardly extending conduit 9. A tightly ?tting cap
' l0 covers the upper end of conduit 9. removable
upon removal of the locking device II. The up
right conduit 9 serves as ?lling means for con
tainer 1 and a liquid substance in desired amount
may be added to the container to the desired
40
height. this height being determined by the sight
glass i2 properly positioned upon the container,
changer. Heat interchange is eifected by pro
viding a coil 23 adjacent to the fuel burner of 15
the heat interchanger, coil 23 being connected to
and having ?uid communication with feed line 24
attached to liquid container 1 adjacent the lower
portion thereof and in general attached in such
fashion that gravity feed may be had of the 20
liquid contained in liquid container 1 to coil 23
of the heat interchanger. ‘To effect gravity feed,
liquid container‘! is advantageously elevated above
the heater. Heating coil 23 and burner 22 are en-
_
closed in a suitable housing 25 provided with oif- 20
take ?ue 26 and a door 21 permitting. in the open
position. access. to coil 23 and burner 22.
In order to drain spent liquid from liquid con
tainer ‘I and from the coil 23 of the heat inter-
I
changer, a valved drain line v28 is provided ad- 30
jacent the lower portion of the system so that
the system may be drained and cleaned at'peri
odic intervals or at such times as such draining
and cleaning is necessary.
_
In order to form the completed system, return 3*’
conduit 30 is attached to and'has ?uid communi-'
cation with the upper portion of coil 23 of the heat
interchanger and leads to and has ?uid communi
cation with the vapor or upper portion l3 of liquid
container 1. Thus upon inserting a material such 4‘)
as an aqueous solution containing a substantial
portion of an alkaline substance such as cal
cium chloride, or other water soluble salts of
instance, pet cocks placed ‘at di?erent heights metals of the alkali or alkaline earth group such
' upon the container and communicating with the ' as sodium, potassium, calcium, strontium or
although other means for determining the level
of the liquid in the tank may be used, as for
interior thereof. In normal'operation the height
of the liquid in the container is maintained some--'
what below the upper con?ning portion 8 of the
container to permit a vapor collecting and form
ing portion l3 between the surface Ill of the liquid
and the top 8 of the container ‘I.
The line 9 is connected advantageously by
means of a T l5 to the vapor introducing conduit
i6 whereby vapors may be led from the top of the
container into the gas line 5, 'a suitable checking
J
barium. or ammonium acetate. sodium acetate.
or other alkali or alkaline earth acetate, mixed
with an alcohol. into the liquid container to a
height somewhat above the lower sight level 3|
and below upper sight level 32, liquid tends to
run into the heating coils. become heated and at
the elevated temperature the escaping tendency of
the alcohol in the mixture is increased, thereby
increasing the vapor pressure of this material
causing'rapid circulation of the heated substance 55
/ .
2
2,105,;35 -
which debouches. into the liquid container ‘I, the
vapor being formed therein passing through ex
haust line l6 into the gas main 5 there to mix‘
with gaseousmaterial containing moisture or
water vapor.
By providing a disengaging space over the sur
face ll of liquid in container 1, unvaporized por
tions of liquid collect in the container and only
the vaporized portion passes oif through line
It to mingle with the gas in main 5. The vapor
comprises alcohol and water vapor in small quan
tities which, when mixed with the- water vapor
present in the gas, lower the frost point of the
mixture to such an extent that such water-‘vapor
4. In apparatus for, eliminating frost in gas
lines, a gas line, a container for liquid from which
a vapor is generated for inclusion into the gas
line, a heat interchanger adapted to impart heat
to the liquid, means for ‘transporting liquid from
the container to the-heat interchanger‘, means
for conveying the liquid, from the heat 'inter
changer to the container, means connecting the
container and the gas line for conveying vapor 1“
from the liquid container to the gas line,~ and 10
means for draining liquid from the container and
heat interchanger.
3
5. In apparatus for ‘eliminating frostin gas
lines, a gas line, a container for liquid from which
a vapor is generated for inclusion in the gas line, 15
a heat interchanger adapted to impart heat to
16 is not removed as solid frost from the gas but
remains therein in vapor" form and clogging of
valves, pipes and connections with such frost is the liquid, means for transporting, liquid from
, prevented. vOr, where frost has already formed, ' the container to the heat interchanger, means
introduction of vapors formed as abovedescribed, for conveying the liquid from the heat inter
causes the frost to pass into-vapor form or melt changer to the container, means connecting the 20
and free or open a line clogged with such frost.
Fresh liquid may be introduced intorcontainer 'I
thrpugh‘line 9-asthe level I‘ falls indicating con
sumption of the frost eliminating material.
Since in many-cases frost elimination of the
type described are installed in isolated spots, an
enclosure 33 of su?lcient size to enclose the ‘heat
container and the gas line for conveying vapor
from the liquid container to the gas line, and .
means enclosing said container and heat inter
changer.
I
i
g.
. i
6. In apparatus for eliminating frost - in gas 25
lines carrying combustible gas, a gas main, a con
tainer for liquid from which a vapor is generated
interchanger l8 and container ‘I is provided, pref
for inclusion into the gas line, a heat interchanger
erably raised above the surface on the standards adapted to impart heat to the liquid, means for
34. The enclosure is provided with a suitable - transporting liquid from the container to the 80
, door 35 whereby entrance may be had to the in
terior of the enclosure. Vents are provided in
the top of the enclosure for the feed line 9 and
?ue 2B, and an opening,36 is formed in the bot
tom thereof in registry with burner 22 to supply
air for combustion of fuel at‘burner 22. ~
' What is claimed is:
'
'
heat interchanger, means for conveying the liq
uid from the heat interchanger to the container,
means'connecting the container and the gas line
or conveying vapor from the liquidv container
to.‘ the gas line, and means connecting the gas 85
main and heat interchanger for supplying the
heat interchanger with combustible gas for com
v 1. In apparatus for eliminating frost in- gas
bustion therein to impart heat thereto.
lines, a gas line, a container forvliquid. from
7. In apparatus for eliminating frost in gas
lines, a gas line, a container for liquid from which
a vapor is» generated ‘for inclusion’ in the gas
which a vapor is generated for inclusion in the
gas line, a heat interchanger adapted-to impart
heat to the liquid, means for transporting liquid line, a heat interchanger adapted to impart heat
from the container to the heat interchange,- and to the liquid, means for transporting liquid from
separate means for conveying the liquid from the the container to the heat interchanger, \means
heatiinterchanger to ‘the container, and means .for conveying the liquid from the heat inter
connecting the ‘container and the ‘gas line for changer to the container, and means connecting 45
conveying vapor from the liquid container to the the container and the gas line for conveying vapor\
--gas
line.
-
-1
Y
-
>
.
>
2.: Inv apparatus for eliminating frost in'gas" '
lines, a-gas line,‘ a container for. liquid from
from the liquid container to the gas line.
>
8. In apparatus for eliminating frost in gas
lines, a. container for liquid from which a vapor 50
which a vapor is generated for inclusion in the
is generated for inclusion in a gas line, a heat in-'
gas line,- a heat-‘interchangeradapted to, im
terchanger adapted to impart heat to the liquid,
'means for transporting liquid from the container
part heat .to ‘- the liquid, gravity conveying means
connecting the container .. and.v the heat inter
changer for conveying liquid from the container
,to theheat interchanger, means for simultane
~ ouslyconveying liquid and vapor from the heat
interchanger vto thegcontainer, and means con
necting the container. and the gas line for con
veyingi'vapor from the liquid container to the
gas line.
‘to the heat interchanger, and separate means] .
for conveying the liquid from the heat inter 55
changer to the container, and means for con
necting the container and the gas line for con
veying vapor from the liquid container to the
galshne.
.
,.
_
,,
.
}
” 9.~ In apparatus for-eliminating frost in gas 60'
lines,_ a gas line, a container for liquid from
which a vapor is generated for-inclusion in the
lines; a gas line, a container for liquid from which ' gas line, means for heating the liquid to raise the
a: vapor is generated for inclusion in the gas line, vapor pressure of the liquid, means for diverting
means for determining the quantity of liquid in the a portion of the gas in the gas line to said heat
container, a heat interchanger adapted ‘to im
ing means to provide operating fuel therefor,
part heat to the liquid, means for transporting and means connecting the container and the
liquid from the container to the heat inter
gas line for conveying vapor from the liquid con
changer, means for conveying liquid and vapor talnerto the gas line.‘
‘
_-3. In apparatus for eliminating frost in gas
I from the heat interchanger to thecontainer, and
means connecting the container and the gas line
for conveying vapor from the liquid container to
the gas line.
-
CHARLES H. TANNER.
ERNEST WATKINS.
70
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