Improved Evaporating Process and Apparatus applicable for Concentrating, Cooling, and other purposes.
Year: 1897

page_text: Date of Application, 9th Feb., 1897
Complete Specification Left, 9th Nov., 1897-Accepted, 18th Dec., 1897
Improved Evaporating Process and Apparatus applicable for
Concentrating, Cooling, and other purposes.
I, JAMES BINGHAM ALLIOTT, of Bloomsgrove Works, Nottingham, in the County of
Nottingham, Engineer, do hereby declare the nature of this invention to be as
follows:-
According to my invention evaporation of liquids for cooling concentrating or other
purposes is effected in a vessel or vessels wherein a more or less perfect vacuum is
established, and condensation of the vapour is effected in a condenser or condensers
in connection with such vessel or vessels by means of liquid such as water from
which air is previously extracted by exposing such liquid to the action of a vacuum.
This may be effected in various ways.
An arrangement of apparatus for carrying my invention into effect comprises a
vacuum vessel in which evaporation is to be effected, a jet condensing arrangement
for condensing the vapour, an air pump and a separate vacuum vessel and air pump
or other means of producing vacuum for depriving of air the liquid to be used for
condensing the vapour.
In some cases I arrange the air pump of the vessel or vessels in which the
evaporation is being effected to discharge into the vacuum vessel in which the
condensing liquid is being deprived of its air or into some of the apparatus connected
therewith so that the air pump of the evaporating vessel or vessels instead of
disharging against the full atmospheric pressure may discharge against a very much
lower pressure.
1007
İmproved Evaporating Process and Apparatus applicable for
Concentrating, Cooling, and other purposes.
I, JAMES BINGHAM ALLIOTT, of Bloomsgrove Works, Nottingham, in the County of
Nottingham, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained in
and by the following statement:-
According to my invention evaporation of liquids for cooling concentrating or other
purposes is effected in a vessel or vessels wherein a more or less perfect vacuum is

page_text: established, and condensation of the vapour is effected in a condenser or condensers
in connection with such vessel or vessels by means of liquid such as water from which
air is previously extracted by exposing such liquid to the action of a vacuum.
This may be effected in various ways.
The accompanying illustrative drawing shows diagrammatically one arrangement
of apparatus according to this invention. It comprises a vacuum vessel A in which
evaporation is to be effected, a jet condensing arrangement B for condensing the
vapour, an air pump C for producing a more or less perfect vacuum in the vessel A
and a separate vacuum vessel D and air pump F or other means of producing vacuum
for depriving of air the liquid to be used in the jet condenser B for condensing the
vapour given off from the vacuum vessel A. The supply of condensing water is so
controlled that the pipe G connecting the condenser B with the vacuum vessel D
will be always full of water, so that the air pump F will only act to deprive of air the
water passing through the vacuum vessel D and will not also act to produce or assist
in producing a vacuum in the vessel A. This end may be attained by maintaining
a suitable height of water in the vacuum vessel I) by means of a float operated valve,
or by placing the bottom of such vacuum vessel below the said pipe G as in the
arrangement shown. The condensing water should also be caused to so flow through
the vacuum vessel D that the air pump F can readily remove air therefrom. For
this purpose the water may enter the said vacuum vessel in the form of spray, or it
may flow therethrough in the form of a thin sheet or stream produced for example
by flowing along or over a shelf or partition within the said vacuum vessel.
degree of vacuum produced by the respective air pumps C and F and the arrange-
ment of the vacuum vessel D should of course be such that water will readily flow
through the pipe G to the jet condensing apparatus B.
The
In some cases, I arrange the air pump C of the vessel or vessels in which the
evaporation. is being effected to discharge its air and vapour into the vacuum vessel D
in which the condensing liquid is being deprived of its air, or into some of the
apparatus connected therewith say into the air pump F, as indicated by the pipe H
shown in dotted lines, so that the air pump C of the evaporating vessel or vessels
instead of discharging against the full atmospheric pressure may discharge against a
very much lower pressure. In this way the air pump C can be caused to produce a
much better vacuum in the evaporating vessel or vessels with which it is connected
than is the case when it is discharged direct into the external atmosphere.
By effecting the condensation of the vapour coming from the evaporating vessel or
vessels by means of a liquid such as water that is brought directly into contact with
such vapour and from which air has been previously extracted as set forth, a more
efficient condensation of the vapours will be attained with water at a given tempera-
ture than has heretofore been usual without liability of impairing the degree of
vacuum produced in the evaporating vessel or vessels by the air pump connected
therewith.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed I declare that what I claim is :-
1. Evaporating liquids for cooling concentrating or other purpose in a vessel or
vessels wherein a more or less. perfect. vacuum is established and condensing the
vapour coming from such vessel or vessels in a condenser or condensers in connection
with such vessel or vessels by means of liquid such as water that is brought into direct
contact with the vapour and from which air has been previously extracted by exposing
such liquid to the action of a vacuum in a separate vessel as set forth.
2. For carrying out the process referred to in the preceding claim apparatus
comprising a vacuum vessel in which evaporation is to be effected, a jet condensing.
arrangement in communication with the said vessel for condensing the vapour coming
therefrom, an air pump for producing a more or less perfect vacuum in the said
vessel and a separate vacuum vessel and means of producing a vacuum therein for
depriving of air the liquid to be used.in the jet condensing arrangement,.substantially
as herein described.

page_text: 3. In evaporating apparatus applicable for concentrating cooling and other purpose,
arranging the air pump used for establishing a more or less perfect vacuum in the
evaporating vessel or vessels to discharge into a second vacuum vessel or air pump,
the arrangement being such that the air pump of the evaporating vessel or vessels
will discharge against a much lower pressure than that of the external atmosphere,
substantially as herein described.
4. Evaporating apparatus constructed arranged and operating as hereinbefore
described with reference to and shown in the drawing annexed.
Dated this 9th day of November 1897.
For the Applicant,
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C. Chartered Patent Agent.