Improvements in Apparatus for Filtering Liquids and Impregnating the same with Gases.
Year: 1895

page_text: Date of Application, 27th Dec., 1895
Complete Specification Left, 22nd Sept., 1896-Accepte1, 5th Dec., 1896
PROVISIONAL
Improvements in Apparatus for Filtering Liquids and Impregnating
the same with Gases.
1, Dr. WILHELM RAYDT, of 195 Silberburgstrasse, Stuttgart, in the Empire
of Germany, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in combined filtering and impregnating
apparatus.
The filtration of liquids and their impregnation with a gas, for example carbonic
acid gas, if required to be done thoroughly has been hitherto effected by the aid
of two separate apparatuses. Apparatuses of this kind are known, which, serving
for the filtration of liquids, are after subsequent cleaning filled with carbonic acid
which, although absorbed by the liquid, yet has for its special purpose to prevent
deterioration of the inner condition during the time of non-usage.
This improved combined impregnating and filtering apparatus allows, by a single
operation applied during the passage of the liquid through the filter, of simul-
taneously and continuously supplying gas for the impregnation of the remaining
liquid to be filtered. For this purpose the gas under pressure is introduced
into a fore chamber communicating with the filtering space, and through this fore
chamber the liquid passes in finely distributed form on its way to the filtering
vessel.
In this improved apparatus, impregnation and clarification are effected simul-
taneously, and the supply of liquid is automatically regulated and the absorption
gas
obtained in a most perfect manner and regulatable at will.
of
The liquid enters under sufficient pressure at the top through a suitable pipe and
passes into a small vessel made of glass or other transparent material and subse-
quently flows, when a suitable valve is opened, through a distributor adapted to
the nature of the liquid, and falls, in the form of a shower, finely distributed or
atomized, into the impregnating cylinder constituting the fore chamber of the
filtering vessel.
Into this impregnating cylinder the gas, for example carbonic acid gas, to be
absorbed, enters under regulatable pressure through a suitable pipe connection near
the bottom of the impregnating cylinder and is absorbed by the liquid in proportion
to its pressure and temperature.
The impregnating cylinder is of such a height as to afford to the gas the
requisite time, to be intimately mixed with and completely absorbed by the liquid
during the lapse of time, within which this latter freely drops down the impregnating
cylinder in small particles.
The impregnated liquid thus arrives at and falls into the filtering vessel, fills
the same, rises along the outer wall of a cylinder inserted into the said filtering
vessel and penetrates the filtering substance or body which is arranged between
two concentric hollow perforated cylinders.
The liquid is thus filtered into the outermost annular cylindrical space of the
filtering vessel and thence flows through a suitable pipe, into a small vessel made
of transparent material and is discharged through a cock in form of a clear and
well impregnated filtrate.

page_text: The atmospheric air or other gases can be discharged from the apparatus by
means of small air cocks arranged on another similar transparent vessel provided
on the top of the filtering vessel and on a pipe provided near the top of the
impregnating cylinder.
The level of the liquid can be inspected through the transparent vessel provided
on the top of the filtering vessel or through a special supplementary transparent
vessel.
In order to automatically regulate the level of the liquid under treatment, a
float is provided in the interior of the apparatus; this float closes the valve afore-
said by the action of a system of levers as soon as the level of the liquid has
risen to a certain height, and re-opens the said valve when the level of the liquid
falls.
It is thus obtained automatically that on the one hand the filtering vessel can
always be utilized all along its height, and on the other hand that the
impregnating cylinder is enabled to be utilized for the impregnation all over its
extent.
In order to increase the filtering surface, filtering substance may in addition
be provided between two perforated walls lying above the bottom of the filtering
vessel.
Improvements in Apparatus for Filtering Liquids and Impregnating
the same with Gases.
I, Dr. WILHELM RAYDT, of 195 Silberburgstrasse, Stuttgart, in the Empire
of Germany, Manufacturer, 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 :—
This invention relates to improvements in combined filtering and impregnating
apparatus.
The filtration of liquids and their impregnation with a gas, for example carbonic
acid, if required to be done thoroughly was hitherto effected by the aid of two
separate apparatus. Apparatus of this kind are known, which, serving for the
filtration of liquids, are after subsequent cleaning filled with carbonic acid, which
latter although absorbed by the liquid, yet has for its special purpose to prevent
deterioration of the inner condition during the time of non-usage.
This improved combined impregnating and filtering apparatus allows, by a
single operation applied during the filtration of liquid through the filter, of
simultaneously and continuously supplying gas for the impregnation of the
remaining liquid to be filtered. For this purpose the gas is introduced under
pressure into a fore chamber communicating with the filtering space, and through
this fore chamber the liquid passes in finely distributed form on its way toward the
filtering vessel.
In this improved apparatus, impregnation and clarification are effected simul-
taneously, the supply of liquid is automatically regulated and the absorption of gas
is obtained in a most perfect manner and regulatable at will.
In the accompanying drawing
Figure 1 shows a vertical section through the impregnating filter and
Figure 2 is a section of a modified form of the lower part of such filter.

page_text: The liquid enters under sufficient pressure at the top through a suitable pipe D
and passes into a small cylindrical chest P, which latter may be made transparent
like a gauge lamp, subsequently flows, when the valve E is opened, through a
distributor F adapted to the nature of the liquid and falls in form of a shower
finely distributed or atomized into the impregnating cylinder B forming the fore
chamber of the filtering vessel A.
Into this impregnating cylinder the gas, for example carbonic acid, to be
absorbed enters at C under regulatable pressure and is absorbed by the liquid
in proportion to the pressure and temperature. The impregnating cylinder B is
of an appropriate height so as to afford to the gases the requisite time, to become
intimately mixed with and completely absorbed in the liquid during the lapse of
time within which this latter freely drops down the impregnating cylinder in small
particles.
The impregnated liquid thus arrives at and falls into the filtering vessel A, fills
the same, rises along the outer wall of a cylinder J and penetrates the filtering
substance or body arranged between two concentrical hollow cylinders K perforated
like screens.
The liquid is thus filtered into the outermost annular cylindrical space M of
the filtering vessel and thence flows through suitable pipe N, into a gauge vessel O
and is discharged through a cock R in form of a clear and well impregnated
filtrate.
The atmospheric air or other gases can be discharged from the apparatus by
means of small air cocks arranged on another gauge vessel L provided on the top
of the filtering vessel on the small cylindrical chest P and on the pipe provided
near the top of the impregnating cylinder.
The level of the liquid can be inspected through the gauge vessel L or through
a special supplementary gauge glass.
In order to automatically regulate the level of the liquid under treatment, a
float G is provided in the interior of the apparatus; this float closes the valve E
by the action of a system of levers H, as soon as the level of the liquid has risen
to a certain height, and re-opens the said valve as it sinks down.
It is thus obtained automatically that on the one hand the filtering vessel can
always be utilized all along its height and on the other hand that the impregnating
cylinder B is enabled to be utilized for the impregnation all over its extent.
In order to increase the filtering surface, filtering substance may in addition be
provided between two perforated walls Ki lying above the bottom of the filtering
vessel A, as illustrated in Figure 2.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
First. An impregnating filter, characterized by the feature that during the
forcing through of the liquid a continuous admission of the gas under pressure
takes place into an ante chamber B which is in communication with the filter
chamber and traversed by the liquid in a finely divided state on its way to the
filtering receptacle A, for the purpose of effecting both the highest possible degree
of impregnation and a rapid and thorough filtration.
Second. A constructional form of the impregnating filter characterized in the
first claim, in which, for the purpose of automatically regulating the level of the
liquid, a float G is arranged with a lever mechanism or equivalent transmitting
device, whereby the valve E for the admission of the liquid is opened or closed.
Dated this 22nd day of September 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.