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Патент USA US3069873

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Dec. 25, 1962
J. H. DOLPHIN ETAL
3,069,863
APPARATUS FOR EVAPORATING IMPURITIES CONTAMINATING
LIQUID GAS, FOR EXAMPLE ACETYLENE CONTAMINATING
LIQUID OXYGEN
Filed July 18, 1958
INVENTORS~
JOHANNES HENDRIKUS DOLPHIN
JOHANNES VAN DER STER
u
BY
Pa
AGEN
iii
3,%9,dd§i
Patented Dec. 25, 1962
2
1
3,069,863
APPARATUS FOR EVAPORATING IMPUEITEES
CONTAMINATING LIQUID GAS, FUR EXAM
PLE ACETYLENE CONTAMINA'HNG LlQUlD
the body near its highest point co-acts with a distributor
adapted for supplying liquid and having an upwardly con
verging outer surface, for example a conical surface or
that of a ball cap, and which further meets at or near
its highest point with a liquid supply duct projecting
downwardly and comprising overhanging parts, for exam
ple teeth, at its lower edge.
Eindhoven, Netherlands, assignors to North American‘
Philips Company, Inc., New York, N.Y., a corporation
A distributor of this type is described in US. patent
of Delaware
application Serial No. 745,192, ?led June 27, 1958, now
Filed July 18, 1958, Ser. No. 749,448
abandoned.
Claims priority, application Netherlands Lluly 24, 1957 10
OXYGEN
.lohannes Hendrikus Dolphin and Johannes van der Ster,
2 Claims. (Cl. 62-42)
In the device according to the present invention, its use
is particularly advantageous.
ing impurities contaminating liquid gas, for example acet
In a further practical form of the invention, the liquid
supply, for example from the distributor referred to, is
ylene contaminating liquid oxygen, more especially but
directed towards a body having a smooth surface and so
The present invention relates to apparatus for vaporiz
not exclusively for use in gas-separating systems, com
prising a wall which is adapted to be heated and on
shaped, for example as a cone, that any liquid supplied to
According to one prior proposal acetylene-contaminated
it is accelerated in flowing off, the stream of drops flow
ing o?’ being directed towards the surface of the heatable
wall provided with recesses and elevations.
In order that the invention may be readily carried into
liquid oxygen is drawn off from a fractionating column
and fed through an atomizer to a separateheater where
effect, an example will now be described in detail with ref
erence to the accompanying schematical drawing, which
the liquid is evaporated by hot, gaseous oxygen.
Any liquid residue is collected into a heated tray and
is a longitudinal section of one form.
which a liquid is evaporated.
Such apparatus are known per se.
Liquid oxygen,‘ for example contaminated by acetylene,
25 is passed through an aperture 1 of a mouth piece 2 in
the direction of arrows p to a distributor 3 in the form
According to another prior proposal oxygen drawn 05
evaporated.
of a cone provided with overhangs 4 at its lower edge 5.
from a fractionating column and, for example, containi
This cone has a strong distributing effect without any
nated by acetylene is fed in small quantities against a
overpressure. Drops accumulate from the projections 4
heated, ?at bottom of a vaporizer where it is evaporated
by boiling on the plate, above which provision is made 30 and fall on the smooth outer surface of a cone 6. The
drops are accelerated along the surface of the cone is
of a fairly large space with a narrowed supply duct for
the liquid.
The present invention has for its object to provide an
apparatus of the aforesaid type, without using overpres
sure for dispersion or a large chamber for boiling on a
heated plate, while precluding any accumulation of acet
ylene.
In accordance with the invention, the heatable wall com
prises recesses and elevations so as to permit individual
and permanently individual drops of the liquid to be
evaporated in the recesses or to jump over from one recess
to the others.
Experiments have shown that, for example an oxide
layer, actually having recesses and elevations‘ and acting
as a semiconductor with regard to the transfer of heat
constitutes a particularly suitable vaporization surface
for the liquids entering into account. Acetylene, for ex
ample, evaporates completely.
In a practicable form of the invention, the surface of
the heatable wall consists of one or more layers of metal
gauze, for example copper gauze. Excellent results are
obtained when connecting, for example, three layers of
gauze offset through an angle of, say, 45° relative to
one another, by sintering or soldering to a massive metal,
for example copper, substratum.
The vaporization surface according to the invention
preferably constitutes entirely or partially the outer sur
face of a body having an outer surface converging towards
the highest point, for example a cone or a ball cap. When
using a cone, its vertical angle may have a value of the
order of 120°.
Particular attention has to be paid to supplying the
liquid to be evaporated to such a body.
For example, in an advantageous form of the invention,
and jump over to the heated conical gauze surface 7.
Its temperature amounts to 80° C. to 100° C.
The evaporating drops jump over from one mesh to
the others. They ?ow together, thus avoiding accumula
tion of acetylene.
The vapours produced escape into chamber 9 and
thence through pipes 55.
Such apparatus may, for example, be used at the bot
tom end of gas-fractionating columns.
What is claimed is:
1. An apparatus for evaporating impurities such as
acetylene from liquid oxygen in a gas fractionating col
umn comprising means for dispensing liquid oxygen, cone
shaped wall forming an angle of 120° and positioned
beneath ‘the outlet for said dispensing means, said liquid
oxygen being adapted to ?ow over said cone-shaped wall,
a chamber located adiacent to said cone-shaped Wall
and in open communication therewith, an opening in said
chamber to the atmosphere, means for heating said cone
shaped Wall, the latter being constituted of a metal gauze
whereby the Leydenfrost phenomenon occurs and all
liquid thereon is evaporated and the acetylene gas there
in is discharged to the atmosphere through the opening in
said chamber, a smooth, cone-shaped element connect
ing opposite faces of said cone-shaped wall, and a conical
distribution plate positioned on said cone-shaped element
with its apex directly underneath the outlet of said dis~
pensing means, the base of said conical distribution plate
overhanging said cone~shaped element.
2. An apparatus for evaporating impurities such as
acetylene from liquid oxygen in a
fractionating col
umn comprising means for dispensing liquid oxygen, a
sloping wall beneath the outlet of said dispensing means
3,069,863
3
4
and over which said liquid oxygen ?ows, a chamber lo
cated adjacent to ‘said sloping Wall and in open com
munication therewith, an opening in the chamber to the
atmosphere, means for heating said sloping W211, the latter
References {Iited in the ?le of this patent
UNITED STATES PATENTS
being a metai gauze constituted of a metal oxide material
whereby the Leydenfrost phenomenon occurs and all
liquid thereon is evaporated and the acetylene gas there
in is discharged to the atmosphere through tie opening
in said chamber.
723,098
1,051,661
1,516,187
1,849,496
1,963,841
2,773,555
White _______________ __ Mar.
Anderson ____________ __ Ian.
Hanson _____________ __ Nov.
Magnus _____________ __ Mar.
Frank ______________ __ June
17,
28,
18,
15,
19,
1903
1913
192.4
1932
1934
Pape ________________ __ Dec. 11, 1955..
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