Improvements in the Construction of Ammonia Apparatus.
Year: 1893

page_text: Date of Application, 18th Oct., 1893
⚫ Complete Specification Left, 18th July, 1894-Accepted, 18th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Ammonia Apparatus.
I, GEORGE EDWARD DAVIS of 32 Blackfriars Street, Salford, in the County of
Lancaster, Chemical Engineer and Consulting Chemist do hereby declare the
nature of this invention to be as follows:-
The object of this invention is to get a more thorough agitation of the lime used
in the apparatus, quicker expulsion of the ammonia, freedom from mechanically
carried particles, and to secure that no lime finds its way into that portion of the
apparatus devoted to the expulsion of the carbonate and sulphide of ammonium.
The foregoing objects I effect in the following manner. Instead of constructing
the apparatus with one central aperture covered by a cap, as described in the
Specification of Letters Patent granted to me in 1888 numbered 16349, I make
the division plate, with a number of smaller apertures each of which is covered by
a hexagonal cap, steadied in its place by wings or otherwise to secure that it shall
not shift from its normal position. These necks are placed on the division plate in
such a manner that they form a honey-comb pattern, and in that way, the periphery
of each cap is in all its points equidistant from the corresponding part of the
periphery of the neighbouring cap, in this way there is a more thorough agitation
of the lime employed in the apparatus and there is no quiet space, in which the
lime can settle and deposit. The increased periphery or steam line also ensures &
quicker expulsion of the ammonia than with stills of the old pattern. In order to
secure that no lime finds its way into the upper portion of the apparatus, the straight
dip pipe usually sealed in the milk of lime and the liming chamber is dispensed
with and a bent, or J tube substituted therefor the longer limb of the J tube entering
the tray above the liming chamber, the end of the shorter limb projecting above.
the surface of the milk of lime in the aforesaid liming chamber.
In treating ammoniacal liquors which show any tendency to frothing, I place a
perforated tray or plate already mentioned, and covered with the aforesaid
hexagonal caps, at a spot above where the liquor enters the apparatus, some of the
steam employed condenses and keeps the caps luted, which then act as washers
arresting the mechanically carried particles.
Dated this 10th day of Octuber 1893
GEORGE E. DAVIS.
G. F. Redfern & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Construction of Ammonia Apparatus.
I, GEORGE EDWARD DAVIS, of 32, Blackfriars Street, Manchester, in the
County of Lancaster, Consulting Chemist, 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:-
The object of this invention is to get more thorough agitation of the lime used
in the apparatus, quicker expulsion of the ammonia, and to secure, that no lime
finds its way into that portion of the apparatus devoted to the expulsion of 'the
carbonate and sulphide of ammonium. These I effect in the following manner.
Instead of constructing the apparatus with one central aperture, covered by a cap,
027

page_text: the contour line of which is a sinuous curve, as described in the Specification of
Letters Patent granted to me in 1888 and numbered 16349 I make the division
plate with a number of smaller apertures, each of which is covered by a hexagonal
cap, steadied in its place by wings or otherwise to secure that it shall not shift from
its normal position. These necks are placed on the division plate in such a manner
that they form a honey-comb pattern, and in that way, the periphery of each cap
is in all its points equidistant from the corresponding part of the periphery of the
neighbouring cap; in this way there is a more thorough agitation of the lime
employed in the apparatus and there is no quiet space in which the lime can settle
and deposit. The increased periphery or steam line also ensures a quicker expulsion
of the ammonia than with stills of the old pattern.
In order to secure that no lime finds its way into the upper portion of the
apparatus, the straight dip pipe usually sealed in the milk of lime of the liming
chamber is dispensed with, and a bent or J-tube substituted therefor, the longer
limb of the J-tube entering the tray above the liming chamber, and the end of
the shorter limb projecting above the surface of the milk of lime in the aforesaid
liming chamber.
In treating ammoniacal liquors which shew any tendency to frothing, I place a
perforated tray or plate already mentioned and covered with the aforesaid
hexagonal caps, at a spot above where the liquor enters the apparatus; some of
the steam employed condenses and keeps the caps luted which then act as washers,
arresting the mechanically carried particles.
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 :-
4
1. The use of hexagonal caps to cover the apertures in the division plates of
ammonia apparatus substantially as, and for the purpose, herein before described.
2. The use of a bent dip pipe to convey the liquor from the division of the
apparatus immediately above the liming chamber to a point in the liming chamber
above the liquor level substantially as, and for the purpose, hereinbefore
described.
3. The use of a perforated tray covered with hexagonal caps placed above
the point where the liquor enters the still to prevent frothing substantially as
hereinbefore described.
Dated this 18th dow of July 1894
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.