Improvements in Arrangements for Drying Slurry by the Waste Heat from Cement Kilns.
Year: 1889

page_text: Date of Application, 10th July, 1889
Complete Specification Left, 15th Mar., 1890-Accepted, 19th Apr., 1890
PROVISIONAL SPECIFICATION.
Improvements in Arrangements for Drying Slurry by the Waste
Heat from Cement Kilns.
I GEORGE BATCHELOR of Grove Road Frindsbury in the County of Kent Foreman
of Works do hereby declare the nature of this invention to be as follows:-
My invention consists of improvements in the arrangements for drying slurry
described in the provisional specification accompanying my application for Letters
Patent No. 4333 dated 12 March 1889 the objects of my said improvements being
to expedite the drying of the slurry on the floors of the upper chambers and thus
to admit of thicker layers of slurry being dried on the said floors and of shorter
drying floors and chambers being used. Also to provide for more rapid and effectual
cooling and ventilation of the lower drying chambers while dried slurry is being
removed from the floors of the said chambers.
My said improvements are hereinafter described.
In order to expedite the drying of slurry on the floors of the upper drying
chambers I form flues longitudinally beneath the floors of the said chambers between
the said floors and the arches by which they are supported and I provide for access of
heated air and gases from the kilns to the said flues by means of openings or passages
in the arched roofs of the lower chamber each of which openings or passages com
municates at the upper part with one of the said flues and at the lower part with one
of the lower chambers.
To provide for rapid cooling and ventilation of the lower chambers when it is
required to remove the slurry dried therein I form shafts in the side walls of the upper
chambers and in the piers which support the roofs of the said chambers which shafts
open above the roofs of the upper chambers and communicate at their lower parts with
one or more of the aforesaid longitudinal flues. For the purpose of preventing the
passage through the said shafts of heated air from the drying chambers while slurry
is being dried on the floors of the said chambers I provide the said shafts with suitable
dampers or shutters or 1 otherwise provide for closing the said shafts.
Dated this 10th day of July 1889.
W. T. WHITEMAN,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Arrangements for Drying Slurry by the Waste
Heat from Cement Kilns.
I GEORGE BATCHELOR of Grove Road Frindsbury in the County of Kent Foreman
of Works 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 consists of improvements in the arrangements for drying slurry
described in the provisional and complete specifications accompanying my application
for Letters Patent No. 4333 dated 12 March 1889 the objects of my said improve-
ments being to expedite the drying of the slurry on the floors of the upper chambers
and thus to admit of thicker layers of slurry being dried on the said floors and of
shorter drying floors and chambers being used. Also to provide for more rapid and
effectual cooling and ventilation of the lower drying chambers while dried slurry is
being removed from the floors of the said chambers.
My said improvements are hereinafter described.
In order to expedite the drying of slurry on the floors of the upper drying chambers

page_text: I form flues longitudinally beneath the floors of the said chambers between the said
floors and the arches by which they are supported and I provide for access of heated
air and gases from the kilns to the said flues by means of openings or passages in the
arched roofs of the lower chambers each of which openings or passages communicates
at the upper part with one of the said flues and at the lower part with one of the
lower chambers.
To provide for rapid cooling and ventilation of the lower chambers when it is
required to remove the slurry dried therein I form shafts in the side walls of the
upper chambers and in the piers which support the roofs of the said chambers which
shafts open above the roofs of the upper chambers and communicate at their lower
parts with one or more of the aforesaid longitudinal flues. For the purpose of
preventing the passage through the said shafts of heated air from the drying chambers
while slurry is being dried on the floors of the said chambers I provide the said
shafts with suitable dampers or shutters or I otherwise provide for closing the
said shafts.
Figure 1 of the accompanying Drawings is a vertical section and Figures 2 and 3
are horizontal sections of one kiln of a row of kilns and the drying chambers in
connection therewith the said kiln and drying chambers being constructed and
arranged as described and illustrated in my aforesaid specifications. Figures 4 and 5
of the said Drawings are vertical sections of the drying chambers. The lines on
which the said sections are taken are as follows. The section Figure 1 is taken on
the line A A Figure 2. The sections Figures 2 and 3 are taken respectively on the
lines B B and C Figure 1 and the sections Figures 4 and 5 are taken respectively
on the lines D D and E E Figure 2.
In the following description the said Drawings are referred to by the letters and
figures marked thereon: The same letters and figures of reference indicate the same
parts in each of the several Figures of the Drawings.
a a a¹ a¹ are the flues formed longitudinally beneath the floor of the upper chamber
and 6b are the openings or passages in the arched roofs of the lower chamber which
openings communicate between the flues a a a' a' and the said lower chamber and
admit of the passage of heated air and gases therefrom into the said flues.
The flues à a at the ends farthest from the kiln communicate with the passages by
which the hot gases from the drying chambers pass to the chimney shaft and the
flues a¹ a communicate at the ends farthest from the kiln by means of passages at a²
(see Figure 3) with shafts a³ a³ (see Figure 2) formed in the side walls of the
upper chamber.
cc are the ventilating or outlet shafts formed in the side walls of the upper chamber
and d d are the shafts formed in the piers which support the roof of the upper chamber
which shafts c c and d d are carried up some distance above the said roofs as shown
in Figures 4 and 5 and are open at their upper ends. ff are flues which form means
of communication between the lower ends of the said shafts c c d d and the longitudinal
flues a a a¹ al. The closure of the said ventilating shafts c c and d d as required when
slurry is being dried in the chambers may be effected by placing a tile or slab or
plate of any non-combustible material on the upper ends of the said shafts.
The action of the arrangement herein before described is as follows:-
While a charge in the kiln is burning a portion of the hot air and gases which pass
therefrom into the lower drying chamber pass from the said chamber through, the
passages bb into the flues a a a¹ a¹ and travel along the said flues heating the floor of
the upper chamber whereby the drying of the slurry on thicker portions of the said
floor is expedited. The said air and gases after passing through the said flues
escape into the open air by the chimney shaft and by the shafts as as the shafts c c
and d d being obstructed by the closure of their upper ends as hereinbefore described.
When the charge in the kiln has burned out and the drying of the slurry in the
chambers is completed and it is desired to expedite the cooling of the drying
chambers and the slurry on the floors thereof the shafts c c d d are uncovered whereby
currents of air are caused to pass through the lower chambers to and through the
flues a a a¹ a' and the said shafts.

page_text: My improvements hereinbefore described are applicable equally to the drying
chambers of a single kiln and to the drying chambers of a row of kilns built side by
side as described in the specifications of my application for Letters Patent No. 4333
of 1889 hereinbefore referred to.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The improvements hereinbefore described in the arrangements for drying_slurry
described and illustrated in the specifications accompanying my application for Letters
Patent No. 4333 of 1889 that is to say the construction of flues beneath the floors of
the upper drying chamber or upper drying chambers through which flues air and
gases from the kiln or kilns and lower chamber or lower chambers may pass substantially
as and for the purposes herein before described.
Dated this 15th dose of Mob 1800
W. T. WHITEMAN,
Agent for the Applicant.