Improvements in apparatus for
Year: 1887

page_text: We, Dr. EDUARD LUHMANN, Chemist of Niedermendig on the Laacher Lake,
Germany, and CARL GUSTAV ROMMENHÖLLER, Merchant, of Avenue Prins Alexander,
Rotterdam, Netherlands 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 :-—
Our invention relates to Improvements in apparatus for withdrawing gases from
liquids and our invention consists in the construction of an apparatus having a vacuum
pan mounted on a suitable frame work and being provided with a vertical partition in
the form of a spiral and an inlet and outlet pipe for the fluid; it also stands in
communication with an air-pump.
These improvements are shown in the accompanying drawing in which fig. 1 is a
sectional side elevation of the complete apparatus and fig. 2 represents a horizontal
section on line of figure 1.
Similar letters of reference indicate similar parts in these views.
Gis a suitable frame work constructed and made to carry the vacuum pau A.
B is the inlet pipe entering pan A from below in the center. C the outlet pipe
entering pan A near its side. Inside the pan is arranged the spiral wall or partition W
commencing at the center of the pan and ending behind the outlet pipe C. V is a
common gauge glass applied to the pan. D is a pipe leading from the upper part of
the pan A to an air pump or similar apparatus for removing gaseous matter. E and F
are gutters of which the one, E, is somewhat higher than the other one F. Pipe B is
conducted to gutter E, that is the higher one, while pipe C communicates with the
lower gutter F.
The manner in which the apparatus operates is as follows:
Let it be supposed the apparatus is to be used for driving out carbonic acid from a
liquid containing such at ordinary pressure. This liquid is conducted into gutter E
in such a quantity that its level rises above the end of pipe B. Before commencing
to put the air pump into motion it is necessary to also fill gutter F with a liquid, for
instance water.
I
When the air pump commences to work it creates a vacuum in pan A and the

page_text: atmospheric pressure without will make the fluids rise in pipes B and C until they
meet in the pan.
It must be mentioned here that it is profitable to make pipes B and C about 25 feet
high (this being about the height the atmospheric pressure will drive the liquid when
a nearly complete vacuum is created within the pan A) because it then cannot happen
that the liquid enters pipe D and runs off into the air pump.
After both liquids have. met in the pan the liquid from gutter E will continuously
be drawn through pipe B into pan A where it runs along the partition W in the
direction of the arrows of figure 2. Hereby the carbonic acid or the like is liberated
from the liquid and sucked-off through pipe D while the liquid descends through
pipe C into gutter F, as the latter's level is lower than that of E, and the whole
system consisting of gutter E, pipe B, pan A, and pipe C acts like an ordinary suction
tube.
The afflux of the liquid to the pan is automatically regulated by the force or velocity
with which the gases are absorbed by the pump for if the pump does not work to its
full capacity, the liquid will but be drawn in proportion to it through pipe B since the
gas being expanded in pan A will then nearly equalize the pressure within and
without.
This improved apparatus may well be applied for liberating any gaseous matter, it
will also be of good use in sugar mills for acting as an evaporator whereby the
syrup is led into pipe E and leaves the apparatus through pipe C in a more consistent
state, and instead of gas there will be steam the matter that is sucked up through
pipe D.
In some cases it may not be necessary to provide the pan with the spiral partition
and besides that the latter needs not have exactly the form of a spiral as long as it
leads the liquid a great distance through the pan.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is :
1.) An apparatus for liberating or evaporating gasy matter from liquids consisting
of a vacuum pan A being provided with an inlet pipe B and an outlet pipe C for the
liquid, pipe C projecting below pipe B and both pipes going in a downward direction
with regard to pan A, the latter being also provided at its upper part with a pipe D
being in connection with an evacuating apparatus for sucking off the gasy matter, all
substantially for the purpose as described.
2.) In an apparatus for liberating or evaporating gasy matter from liquids consisting
of a vacuum pan A being provided with an inlet B and outlet C for the liquid at its
bottom, and with an outlet D for the gases at its upper part, a curved partition W
arranged on the bottom of said pan and conducting the liquid from the inlet B to the
outlet for making the liquid travel a great distance through the pan, substantially
in the manner and for the purpose as described.
Dated this 29th day of October 1887.
DR. EDUARD LÜHMANN.
CARL GUSTAV ROMMENHÖLLER.
By A. Kuhnt & R. Deissler,
38, Alexander Str. Berlin, Germany.