IMPROVEMENTS IN CALCINING FURNACES FOR RECOVERING SODA ASHI to be as follows:
Year: 1884

page_text: I GEORGE HITCHEN of Hollins Grove, Darwen in the County of Lancaster Paper
Mill Manager do hereby declare the nature of my Invention for "IMPROVEMENTS
IN CALCINING FURNACES FOR RECOVERING SODA ASHI to be as follows:
"
1
This 'invention has 'reference to the calcining furnaces employed 'for recovering
soda ash from esparto or other liquor.
According to the process usually followed for recovering the ash the liquor
containing it is first evaporated to about the consistency of syrup and 'then 'run'
into a furnace 'to be calcined. It is to the furnace that the 'present invention
'relatės.
The invention consists in constructing 'the'calcining furnace double, that is to say,
with calcining or burning off chamber or chambers on each side of the furnace, and
in running the inspissated liquor to the two sides or chambers alternately, the doors
communicating between 'the chambers and the flues being alternateley opened and
closed so that the process of calcination takes place in the chambers at each side
alternately and is therefore practically continuous.
By the above arrangement considerable economy is 'obtained and the necessity
for stopping the calcining process while the burning off chamber'is being riked'out
as with ordinary calcining furnaces, is obviated.

page_text: I GEORGE HITCHEN of Hollins Grove, Darwen in the County of Lancaster, Paper
Mill Manager do hereby declare the nature of my invention for "IMPROVEMENTS
IN CALCINING FURNACES FOR RECOVERING SODA ASII" and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:―
This invention has reference to the calcining furnaces employed for recovering
soda ash from esparto or other liquor.
According to the process usually followed for recovering the ash the liquor
containing it is first ovaporated to about the consistency of syrup and then run into
a furnace to be calcined. It is to the furnace that the present invention relates.
The invention consists in constructing the calcining furnace double, that is to say,
with calcining or burning off chamber or chambers on each side of the furnace,
and in running the inspissated liquor to the two sides or chambers alternately,
the doors communicating between the chambers and. the flues being alternately
opened and closed so that the process of calcination takes place in the chambers at
each side alternately and is therefore practically continuous.
By the above-arrangement considerable economy is obtained and the necessity
for stopping the calcining process while the burning off chamber is being raked
out as with ordinary enleining furnaces is obviated.
The accompanying drawings show a calcining furnace constructed according to
my invention. Figure 1 is a sectional elevation, Figure 2-a-sectional-plan-aud
Figure 3 a cross section on the line A, B of Figure 1. a is the fire-place situated
at or near the middle of the furnace; on each side of the fire-place are one or more
calcining or burning off chambers b, b. c is the flue from the chamber or chambers
at the left hand side of the figure and d the flue froin the chamber or chambers at
the right hand side. The gases from the flue c may pass under the furnace so as to
enter the fluo d as indicated by the arrows or the gases from the two flues may be
carried away separately. c is the door between the chamber or chambers at the
right hand side of the furnace and the flue d; the corresponding door at the left
hand side is not shown. The inspissated liquor is as already explained run to the
two sides of the furnace alternately the doors communicating between the chambers
at the two sides and the flues being alternately opened and closed so that the
process of calcination takes place in the chambers at each side alternately and is
therefore practically continuous.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declaro that what
I claim is
Constructing calcining furnaces for recovering soda ash substantially in the
mauner herein before described.