Improvements in and relating to the Purification of: Gas.
Year: 1894

page_text: Date of Application,. 6th Mar., 1894-Accepted, 14th- Apr., 1894
COMPLETE SPECIFICATION:
Improvements in and relating to the Purification of: Gas.
We, EMIL FLEISCHHAUER, Engineer, of Gotha Germany and Max
BERNSTEIN, Proprietor of the Firm of Joh. Friedr. Wallmann & Co., Engineering
Works of 74 Blumen Strasse Berlin, Germany, do hereby declare the nature of our
invention and in- what manner the same is performed to be particularly described
and ascertained in and by the following statement :-
The present invention relates to apparatus for the purification of gas for use. in.
gas works and consists mainly in a condenser, in which the gas is freed from the
tar and ammonia contained therein by being energetically agitated and combined
with sprayed water.
And in order to make the present invention more easily intelligible reference:is
had to the accompanying drawings in which similar letters denote similar parts
throughout the several views :-
Fig. 1 being a side elevation of the apparatus partly in section,
Fig. 2 a part vertical section of one part of the said apparatus, drawn to a larger
scale,
Fig: 3 a detail section through one of the rotary pockets for agitating, the gas,
Figs. 4 and 5 top and bottom views respectively of the rotary, water pans, and
Fig. 6 a section on the line G H in Fig. 1.
Reference being had to Fig. 1.:-A is the casing having semicircular cover: B
secured thereto, c is a shaft mounted' therein and carrying rotary discs.e! e² e et
fast on the same and held in position at one side by the collar d and at the other by
a nut. Of these discs elande are somewhat. smaller in diameter than the other
two and held a short distance apart from the same by means of intermediate discs
as shown: and e* are provided with a series of perforations . around their
circumference as shown at Fig. 6 and arranged over each of these series of
perforations is a pocket i having one side open and. closed in or partially so by
means of a perforated plate h bent to conform to the outer circumference of the
discs and e' which are of suitable diameter to allow a small'space to remain
between their outer edges and the interior surface of the semicircular cover of the.
casing (Fig. 3). The discs e¹ and e³ are provided at and near to their circumferences
with laterally extending pins k k which just clear the back surfaces of the discs e²
and e, or may also touch the same as both discs revolve together.
m is the gas
inlet to the casing. A B and a water inlet and' r' an outlet syphon; a continual
flow of water is let into the apparatus which should be kept at the height in the
said apparatus indicated in the drawings, i.e. so as to cover nearly half the discs.
The shaft c can be driven from any suitable motor by means of the pulley l.
Below the discs and arranged to just clear the same are a series of horizontal
hurdles of sheet metal, which serve to partition off the upper water which. is
perturbed by the motion of the discs and pockets therein and to keep the lower
part g of the water in a calm state. is a partition: arranged in, the casing
between the two pairs of discs to prevent the passage of the gas from the space
above the first pair of discs to that above the second pair direct.
is the outlet pipe for the gas when it has passed the discs, said outlet leading
to the second part of the apparatus, which we will now proceed to describe.
This apparatus consists of a series of shallow, stationary pans w¹ built up on the
lowest pan w, which is bolted to the under reservoir having suitable outlet
syphon. To the top pan w¹ is attached the gas outlet C. Extending vertically
throughout the apparatus is the rotary shaft carried below in vertically adjustable
bearings and also at the top in suitable bearings, which are omitted in the
drawing for the sake of greater clearness. The apparatus is closed round the shaft

page_text: at the top by means of the water seal t¹ and in similar manner at the lower inlet
throat t by means of the water seal. On the rotary shaft & are arranged one above
the other a series of rotary pans uu similar in form to the series of outer stationary
pans and arranged one within each stationary pan. These rotary pans are provided
with four or more inner radial ribs 3 and with a similar number of ribs at the
bottom underneath (Figs. 4 & 5) whilst in the bottomless sections w forming
the casing of the apparatus wings y y are arranged to extend downwardly into the
rotary pans u and slanted in a direction opposite to that of rotation of the said
pans (Fig. 2) and also having the side nearer the centre of the apparatus longer
than that further from the same, thus these wings y will throw the water in the
pans u outward against the inner walls of the casing when the said pans rotate.
The shaft may be rotated by means of bevel wheels. at the top or any other
suitable gearing from a motor. 2 is the water inlet.
The apparatus works in the following manner:-
The gas coming from the exhaustor enters the casing A Bat. m and is caught.
up. by the rotating pockets i and driven, by the centrifugal force partly through the
series of perforations at 9 and partly through the perforated covers h and impinges
against the interior walls of the casing. The two pairs of discs should revolve,
advantageously at a speed of about 3 metres circumferential speed. The gas
pressed through the perforations 9 g strikes the second disc e3 and is driven by
the centrifugal force through the pins kk, which thoroughly separate it, a second.
time against the walls of the casing, whence it passes into the space n between the
two disc pairs, after which it undergoes the same operation again from the second
pair of discs ele. During this operation the disc pairs are continually spraying
the water against the interior walls of the casing. The gas on being thrown
against the damp walls with the sprayed water, is freed from the tar contained
therein the molecules of which are caused to combine and separate out. At. the
same time the walls are being continually played upon by the water and thus the
tar deposits on the same are continually washed off. As the tar sinks in the water..
in the bottom of the apparatus through the hurdles p, the upper spray water
will always be to a certain extent clear, the hurdles preventing the perturbation
from extending below the said upper water and thus hindering the stirring of
the whole water mass, and allowing the tar to sink quietly to the under water
and remain there undisturbed, to be drawn off by the syphon. The gas having
passed the first part of the apparatus flows along the pipes into the reservoir. v at
the bottom of the second part, here it ascends the throat t and passes upwardly
round each of the pans a successively to the outlet C at the top. In its upward
passage it first meets the under ribs u¹ of the lowermost pan u which is rotating
and consequently drives the gas stream outwards and upwards between the said
pan and casing in the direction of the arrows, shown in dotted lines in Fig. 2.
Arriving at the top of the pan it meets the water being sprayed from the same
by the rotary motion, interior ribs 3 and stationary wings y. The gas receives
the same treatment in passing each of the pans successively, and is in this manner
freed from the ammonia contained therein. Thus the purest gas at the top of the
apparatus meets the pure water entering the casing at 2 and the lower the water
sinks in the apparatus the more ammonia it will contain.
As the shaft a is vertically adjustable the space between the pan bottoms and
the casing can be varied at will and the apparatus regulated to any desired quantity
of gas.
The number of pans and sections of the casing may be varied according to
requirement without departing from the nature of the present invention; we can
also increase the number of pairs of discs employed in the casing A B should it be
considered advisable.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner it is performed we declare that what we claim is :-
1. The combination of a casing A having semicircular cover B and a rotary
shaft c mounted therein, a series of pairs of discs e, e¹, e², e³, mounted to rotate

page_text: therein and provided with conical pockets i, pins k and perforations 9 and has
specified, having further gas and water inlets, and a syphon, a gas outlet s leading
into the lower reservoir of an apparatus formed of the superposed casing
segments w w and interior rotary pans u u, suitable gas outlet C, water inlet
and outlet to said casing and means to rotate said pans substantially as
described.
2. In combination with the apparatus covered by Claim 1 the arrangement
in the casing B of a series of metallic hurdles p, for the purpose specified.
3. In combination with the apparatus covered by Claim 1, the interior ribs 3 on
the pans and exterior ribs u' on the bottom of said pans, as also the stationary
slanting wings y to project into the said rotary pans for the purpose substantially as
described.
4. In combination with the apparatus claimed the vertically adjustable shaft æ
for the purpose specified.
Dated this 6th day of March 1894.
W. P. THOMPSON & BOULT,
Agents for the Applicants.