Improvements in Column Stills for Distillation of Gas Liquor and other Liquids.
Year: 1891

page_text: Date of Application, 8th Aug., 1-91-Accepted, 8th Aug., 1892
COMPLETE SPECIFICATION.
Improvements in Column Stills for Distillation of Gas Liquor and
other Liquids.
I, ALFRED COLSON, of Millstone Lane, Leicester, in the County of Leicester,
Civil 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 :-
My invention relates to column stills of the kind described in Specifications
No. 5075 of 1879, No. 3643 of 1882, No. 2578 of 1885 and No. 16806 of 1887, and
are employed for distillation of ammoniacal liquor. In these stills the liquor is
distributed over a uumber of trays arranged above one another within a column or
steam tight vessel, and steam admitted below passes up through openings of the
trays covered by hoods and escapes under the edges of the hoods through the
liquor.
These edges are usually serrated and rest on the trays, and the serrations often
become irregularly choked by lime or other deposited matter, so that unless they
are frequently cleared, most of the steam escapes at a few points blowing aside the
liquid without coming sufficiently in contact with it. Even when the serrations
are clear the steam, issuing through them in considerable streams, fails to become
sufficiently distributed through the liquid. My invention has for its object to
ensure a better distribution of the steam through the liquid, to provide against the
choking of the steam outlets by deposit, and thus to avoid the necessity for
frequently taking the apparatus apart, as I shall describe referring to the accom-
panying drawings.
Fig. 1 is a vertical section and Fig. 2 is a sectional plan of the upper part of a
column still, constructed according to my invention for distilling ammoniacal liquor
or such like purposes.
The trays A may be kept apart by separate distance pieces at their edges as
they are usually made; prefer, however, in order to simplify the jointing and to
reduce the number of joints, to cast each tray A in one with the distance piece B
standing up
all round it, so that each tray is a shallow dish jointed to the next by
bolts passing through ears E squeezing a caoutchouc or other packing ring Ċ
between their grooved meeting faces. Through each tray A there are holes D
each of which is made as a short tube standing up above the bottom of the tray,
and on each of those tubes is placed a cap H having its lower side perforated with
numerous small holes like the rose of a watering pot. The steam passing up
through the central hole into the interior of each cap, spreads out laterally therein
and issues by the perforations in numerous small streams or bubbles passing
through the liquid in the tray. Above the highest tray I fix a perforated plate K
to prevent priming of the liquid by its frothing up, and as a farther precaution, I
provide the outlet for the gas with a perforated mouth piece L.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
In column stills for distillation of gas liquor and other liquids the construction
of the trays with their rose caps, substantially as described with reference to the
accompanying drawings.
Dated this 9th dow of Aust 1801
ABEL & IMRAY,
Agents for the Applicant.