Improved Evaporating Apparatus, Applicable for Cooling or Heating Liquids and for Charging Gases with Vapours.
Year: 1889

page_text: Date of Application, 21st Aug., 1889-Accepted, 28th Sept., 1889
COMPLETE SPECIFICATION.
Improved Evaporating Apparatus, Applicable for Cooling or Heating
Liquids and for Charging Gases with Vapours.
I, ROBERT REICHLING, Mechanical Engineer, of Dortmund, in the German
Empire, do hereby declare the nature of this said invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
This apparatus chiefly comprises a movable evaporating surface or body, and
means for constantly supplying it with liquid, and with an air or other gas
current in such a manner that the latter acts uninterruptedly on the entire evaporating
surface, in order to abstract heat from the liquid or to charge the gases with
vapours.
In the following description, reference will be made to the annexed drawings, of
which Fig. 1 is a longitudinal section and Fig. 2 a cross section of a vapour
condenser embodying my invention, while Figs. 3 and 4 represent modifications.
In Figs. 1, 2 and 3, A is the condenser proper, chiefly composed of tubes
situated in the cooling water, while B is the movable evaporating body situated
outside the cooling water.
The evaporating body B is in this case formed of a series of corrugated discs a, a,
mounted on a horizontal tube or hollow axle C, which receives rotary motion by
means of a belt pulley. As indicated by the arrows, the water to be cooled passes
from the condensing tank D, through a pipe 6 into a tube situated in the interior of
the hollow axle C, and escapes radially through a series of jet openings arranged
in such a manner that each jet supplies the space between two evaporating discs.
The air or other gas enters the hollow axle from the ends, and escapes radially
through a number of perforations, as shown by the arrows, so as to come in contact
with the said discs.
In Figs. 1 and 3, the arrow c indicates the entrance of the steam into the condenser,
while the outlet of air, from the evaporating space is indicated by the arrow e. d is
an additional air inlet.
The air entering the hollow shaft C at the end thereof, is driven out through the
perforations at its circumference, and comes in contact with the cooling water that
has escaped through the jet openings of the pipe b, thus producing evaporation and
reducing the temperature of the water. To produce a stronger current of air than
can be obtained by the centrifugal force alone, the air may be supplied by a blower.
If hot gases or vapours are employed, they may serve to beat the liquid."
In Figs. 1 and 2 the water is supplied to the evaporating discs by gravity, and in
Fig. 3 it must be driven through the pipe by a pump or other artificial means.
To keep the water in the cooling tank at one constant level, the water that has
been lost by evaporation must be replaced, from a high level reservoir or by means
of a pump, and the admission may be regulated by means of a float whose position
depends on the level of the water in the water tank D.
Instead of mounting the evaporating bodies on a horizontal shaft as shown, they
may be fixed on a vertical shaft. In the example represented by Fig. 4, the
evaporating body consists of an endless travelling band, which may be smooth or
armed with ribs or plates, so as to form a large surface meeting the plates in the
direction of the arrows, while the air current is conducted parallel to the ribs.
Other variations may be made without departing from the principle of my
invention. As a rule, however, I prefer the revolving discs, as represented by
Fios 1 and 2

page_text: Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, I wish it to be understood
that I do not claim movable evaporating bodies or surfaces which dip into the
liquid so as to expose only a part of their surface to the air current.
claim is :-
What I
1. An evaporating apparatus comprising in its construction a movable evaporating
body, such as revolving discs, an endless band or similar appliance, and means for
admitting liquid and air or gas in such a manner that the air or other gas has
constant access to the entire surface, in order to cool or heat the liquid, or to charge
the gas with vapour, substantially as described.
2. An evaporating apparatus of the type specified by claim 1, consisting of a
hollow shaft carrying a series of evaporating discs and means for admitting liquid
and air or gas in the centre and discharging them in a finely divided condition
through the circumference with the aid of centrifugal force, substantially as
described.
Dated this 91st do of Ave 1400
ROBERT
REICHLING.
By Fairfax & Wetter,
433, Strand, London, Agents.