Year: 1886

page_text: Date of Application, 27th Oct., 1886.
Complete Left, 22nd July, 1887.
Complete Accepted, 26th Aug., 1887.
I, FREDERICK SIEMENS, of No. 12 Queen Anne's Gate, Westminster in the
County of Middlesex, Engineer, do hereby declare the nature of this invention to be
as follows:-
My invention relates to a furnace arranged for evaporating saline liquors, and
calcining the concentrated product, the object which I have in view being to render
the same structure and firing available for both purposes, and to shield the
metal of the evaporating pan from the destructive effects of extreme local heat. For
this purpose, I build the body of the furnace preferably of circular form in plan, and
admit at one side the flame of the gas and air which may have passed through any
suitable regenerators, the flame sweeping forwards and passing either directly or
after sweeping round towards flues by which the products of combustion pass to a
chimney, through regenerative chambers if desired. Above the crown of the furnace
I provide a space which is covered by the evaporating pan. This space communicates
with the furnace chamber by several flues, which may be formed in the side walls;
by these flues there is a certain circulation of hot gases sufficient to heat the
evaporating pan without locally overheating it. When greater heat is required for
the pan, openings can be made through the crown of the furnace by removing bricks
or blocks covering them. In the angles of the structure I form passages leading
down into the furnace chamber. By these passages the dried material from the pan is
sent down to the bed of the furnace to be calcined. There are in the sides of the
furnace chamber suitable working doors by which access is given to spread the
material on the bed and to withdraw the calcined product.
D
3.1
1
1000
ABEL & IMRAY,
28, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: A Combined Evaporating and Calcining Furnace.
I, FREDERICK SIEMENS of No. 12 Queen Anne's Gate, Westminster in the
County of Middlesex 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 a furnace arranged for evaporating saline liquors, and
calcining the concentrated product, the object which I have in view being to render
the same structure and firing available for both purposes, and to shield the metal of
the evaporating pan from the destructive effects of extreme local heat. For this
purpose, I build the body of the furnace preferably of circular form in plan, and admit
at one side the flame of the gas and air which may have passed through any suitable
regenerators, the flame sweeping forwards and either passing directly or after
sweeping round, towards flues by which the products of combustion pass to a chimney
through regenerative chambers, if desired. Above the crown of the furnace I provide
a space which is covered by the evaporating pan. This space communicates with the
furnace chamber by several flues, which may be formed in the side walls; by these
flues there is a certain circulation of hot gases sufficient to heat the evaporating pan
without locally overheating it. When greater heat is required for the pan, openings
can be made through the crown of the furnace by removing bricks or blocks covering
them. In the angles of the structure I form passages leading down into the furnace
chamber. By these passages the dried material from the pan is sent down to the bed
of the furnace to be calcined. There are in the sides of the furnace chamber suitable
working doors by which access is given to spread the material on the bed and to
withdraw the calcined product.
Fig. 1 is a longitudinal section and Fig. 2 a sectional plan of a combined evaporating
and calcining furnace according to my invention. Figs. 3 and 4. are sections on the
lines X X and Y Y respectively. A is the body of the furnace preferably of circular
form. Above its crown arch is a space B covered by the evaporating pan C, this space
communicating with the furnace A by several flues D formed in the walls. The flame
enters by the flue mouth E and spreads out over the bed issuing from the furnace
chamber by the outlets M, some of the combustion gases ascending the flues D and
after circulating through the space B and heating the pan C, descending by other
flues D' and issuing with the rest of the products by the flues M.
Through the crown of the furnace are provided openings such as are shewn at b
which may be covered by bricks or tiles, or, when greater heat is required for the pan,
they may be more or less opened, so as to expose the pan more or less to radiation
from the flame in the calcining chamber.
In the furnace shewn by the drawings gas from a producer is supplied by the flue G,
and thus meets with air supplied by the flue I, the mixture producing flame at E.

page_text: In the angles of the structure are formed passages K by which the material dried in
the pan C can be introduced into the furnace chamber Å to be calcined.
LL are
working doors by which access is given to spread the material over the bed or to
charge or remove it.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is :-
The construction and use of a combined evaporating and calcining furnace, having
an evaporating pan placed over the crown of the calcining chamber and heated from
the chamber and partly by radiation from the flame, substantially as herein described.
Dated This 90nd
Il., 1007
Dated this 90nd
day
.. 1007
ABEL & IMRAY,
Agents for the Applicant.
ABEL & IMRAY,
Agents for the Applicant.