APPARATUS FOR DEODORIZING THE FUMES OF CEMENT AND OTHER KILNS
Year: 1884

page_text: We, EDMUND ASHBY of Southampton in the County of the same Town, Cement
Manufacturer and ALFRED ASHBY of Grantham in the County of Lincoln,
Surgeon, do hereby declare the nature of the said, Invention for "PROCESS AND
" to be
APPARATUS FOR DEODORIZING THE FUMES OF CEMENT AND OTHER KILNS
as follows:-
The fumes and gaseous products from cement and other kilns are complained of
by reason of their offensive smell and of the obscurity which they cause in the
atmosphere.
It has been attempted to deodorize these products, by passing them through or
over fire, but as they are accompanied by a large proportion of carbonic anhydride
which extinguishes fire, this process is not found practically successful, except nt
the expense of an excessive quantity of fuel. Our invention relates to a process
and apparatus whereby the difficulties attending the treatment of the products
referred to are mostly overcome. Taking the case of a cement kiln we first raise
its contents to a moderate heat suflicient to drive off organic matter accompanied
with only a small proportion of carbonic anhydride. We pass these fumes through
a retort or furnace chamber in which coke or other fuel is kept incandescent by
an adequate supply of burning fuel and the furnace chamber is provided with
additional supplies of air through hollow fire bars or otherwise beyond the fire, if
necessary for complete combustion.
The fumes in passing through the incandescent coke or other fuel have their
carbonic anhydride converted into carbonic oxide and this, with the other
ingredients of the fumes is thereby burned. When the organic matter has been
thus separated from the material in the kiln the hot gases may be led by another
course without passing through the coke or other furnace and then the heat of the
kiln may be raised to that required for full treatment of the material.
The hot gaseous products from the furnace chamber and those direct from the
kiln may be led on their way to the chimney, or other exhausting apparatus, under
suitable floors so that their heat can be partly utilised for drying the slurry or
other matter placed on those floors preparatory to its being treated in the kiln.
The above described apparatus is applicable to ordinary kilns provided suflicient
beat be maintained in the furnace.
Slurry may also be treated by this process and be subsequently burnt in ordinary
kilns without evolving gases such as are referred to in the Alkali &c Works
Regulation Act of 1881.
DUAL DOLL
1004
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.

page_text: COMPLETE
We EDMUND ASUDY of Southampton in the County of the same Town, Cement
Manufacturer and ALFRED ASHBY of Grantham, in the County of Lincoln,
Surgeon, do hereby declare the nature of our invention for "PROCESS AND
APPARATUS FOR DEODORIZING THE FUMES OF CEMENT AND OTHER KILNS," and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :—
The fumes and gascous products from cement and other kilns are complained of
by reason of their offensive smell and of the obscurity which they cause in the
atmosphere.
It has been attempted to deodorize these products by passing them through or
over fire but as in the case of cement kilns especially they are accompanied by a
large proportion of cartonic anhydride, which extinguishes fire, this process is not
found practically successful except at the expense of an excessive quantity of fuel.
Our invention relates to a process and apparatus whereby the difficulties
attending the treatment of the products referred to are mostly overcome. Taking
the case of a cement kiln we first raise its contents to a moderate heat sufficient to
drive off organic or other odoriferous matter accompanied with only a small
proportion of carbonic anhydride. We pass these fumes if they are still liable to
be offensive through a retort, furnace chamber or kiln in which coke or other fuel
or material is rendered incandescent or kept so by an adequate supply of burning
fuel, and, if necessary for complete combustion, the furnace chamber may be
supplied with additional supplies of air beyond the fire through hollow fire bars
or otherwise. The fumes in passing through the incandescent fuel have their
carbonic anhydride converted into carbonic oxide which is burned with other
combustible ingredients of the fumes. When the organic or odoriferous matter has
been thus separated from the material in the kiln the fire for burning the effluvia
may be discontinued or the hot gases may be led by another course without
passing through the fire, and the heat of the cement kiln may then be raised to
that required for treatment of the material. The hot gaseous products from the
fire or furnace as well as those from the kiln direct may be utilised for drying or
heating purposes on their way to the chimney or other outlet.
In the accompanying drawings showing an arrangement of apparatus according
to our invention, Fig 1 is a sectional plan on X X of Fig 2 which is a longitudinal
section on Y Y of Fig 1, and Fig 3 is a transverse section on Z Z. The gaseous
products coming from the cement or other kiln by the flue A may, by means of the
valve B be turned into either of the flues C or D. From the flue C they pass
through incandescent fuel in a fire-place E or in several of these. Each of these
fire places has tubular fire bars F over the front part of which is a doad plate G to
receive the fresh fuel, which as it is ignited, is pushed forwards on to the fire bars
and a dead plate beyond them. A limited supply of air is admitted through apertures
in the fire door H and also under the dead plate G and through the bars F, so as to
maintain the combustion in and beyond the fire. The hot products from the fire

page_text: or fires E pass into the flue D and thence are distributed through flues K for
drying or heating purposes. When the gaseous products coming by A cease to be
of an offensive kind, the valve B can be turned so as to direct them into the
Alue C, the fires E being then damped or extinguished, or employed to deal with
the products from another kiln.
When our invention is applied to a kiln of ordinary construction, we deal as
described with the offensive emanations during the first part of the burning, as
they are given off before the material in tho kiln becomes very highly heated.
When the emanations referred to have been driven off, and the heat rises in the
kiln, the gaseous products from the kiln are allowed to pass away as usual until
the burning of the cement or other material is completed. Instead however, of
effecting all the burning in a single kiln, the first part of the burning may be
effected in one kiln or compartment the effluvia from which are treated as above
described, and the partly burned material may then be transferred to another kiln
or compartment to have the burning completed. This latter kiln or compartment
may be open, the effluvia having been disposed of before the material is introduced
into it.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
1. In burning cement or other material giving off objectionable effluvia,
applying in the first place moderate heat to drive off organic and odorous fumes,
and exposing those fumes to destructive heat, substantially as herein described.
2. In combination with a cement or other kiln a fire through which
objectionable fumes from the kiln are passed along with air sufficient to maintain
incandescence and consume the combustible gases, substantially as herein described.
"
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