IMPROVEMENTS IN FURNACES Of RETORT CHAMBERS USED IN GAS MANUFACTURE, AND IN MEANS FOR SUPPLYING HEATED AIR THERETO
Year: 1885

page_text: Manufacture, and in Means for Supplying Heated Air thereto.
I, JAMES MONAIR, Manager of the Corporation Gas Works, Renfrew N.B. do
hereby declare the nature of my invention for "IMPROVEMENTS IN FURNACES Of
RETORT CHAMBERS USED IN GAS MANUFACTURE, AND IN MEANS FOR SUPPLYING
HEATED AIR THERETO," to be as follows:-
My invention consists of improvements in the arrangement and constructions of
furnaces of retort chambers and in the means employed for conveying and heating
the air supply therefor.
The gas making retorts are arranged in the ordinary manner in tiers the several
retorts being separated from each other by flue spaces round which the hot fire
gases circulate. The furnace which is located in the lower front part of the
chamber and a little above the ground level, instead of being as usual below it,
consists of a fire grate enclosed in front and at the sides by the walls of the
chamber and at the back by a half-arch springing from the floor and rising towards
the front wall, between which and the top of the half-arch is left a space for the
outflow of the incandescent gases which play upon and heat the retorts. In the
front wall of the furnace is a hinged door opening downwards to an inclined
position in which it forms a convenient hopper to receive and direct downwards
into the furnace, the hot coke which is emptied out of the retorts. A steam pipe
is led in below the grate bars to inject steam into the incandescent coke and a
suitable fire door is also provided for access to the fire-grate.
At the back of the arch of the furnace is a second arch, or the furnace arch is
made hollow and through the hollow space between the arches heated air is
discharged to meet and effect combustion of the hot furnace gases.
The air supplied in this is heated by traversing back and forth through a series
of flues formed by unglazed fire clay pipes which are laid along the crown of the
retort chamber, down the backwall and along the floor of the retort chamber and
are heated by the products of combustion of the furnace which traverse in the
reverse direction over the floor or along flue paces from which the air conduits are
separated by the brickwork. The use of such pipes or conduits for conveying the
air which is heated in its course to the furnace top, has the advantage that leakage
does not readily take place and that access may be readily obtained for cleaning or
for removal and repair. Air registers or devices for regulating the admission of
the air may be fitted in the front wall opposite the inlet for the air to the pipes.

page_text: improvements in
Furnaces
от Retort спашреть
Manufacture, and in Means for Supplying Heated Air thereto.
20
I JAMES MCNAIR Manager of the Corporation Gas Works Renfrew N.B. do
hereby declare the nature of my invention for "IMPROVEMENT IN FURNACES OF
RETORT CHAMBERS" 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 for its object the construction of Furnaces whereby economy
in the consumption of fuel, and efficiency are combined. These Furnaces are of the
kind generally known as "Regenerator," and are specially adapted to the heating
of Retorts, used in the Manufacture of Gas, but are also applicable to other
purposes, where economy, and intensity of heating power are essential.
In order that the invention may be more easily understood, Drawings are
attached hereto, of which the following is a description.
In each of the Figures similar letters refer to the same parts. Figure 1 is a
front elevation A B on Figure 2. and Y Z on Figure 3. Figure 2 is a longitudinal
section through CD on Figure 1. Figure 3 is a plan through E F on Figure 1.
Figure 4 is a longitudinal section of Air-way for the admission of Steam and Air to
the bottom of Furnace G. on Figure 1.
The invention consists in a combustion chamber H. enclosed in front and at the
back by a half-arch springing from the floor of the oven, and rising towards the
front wall, between which and the top of the arch, is left a space for the out flow
of the incandescent Gases, which play upon, and heat the Retorts. The primary
air supply, along with Steam issuing from a Jet, is admitted on either side of the
combustion chamber at the openings marked J. Figure 1. which travel alongside
the chamber for a distance as shown on Figure 4, which afterwards passes under,
as indicated by the arrows and issues through the ports marked K. to the com.
bustion chamber. The Air for the secondary combustion is admitted above the
oven arch, in front at the openings marked L. Figure 1. The air traverses along
the top of the oven arch, and flows downwards alongside of the upgoing waste
flue M. Figure 3. situated at the back of the oven, from thence it traverses back-
wards, and forwards, N Figure 3 to the point P. figure 3, where the heated air
from both sides meet, and from thence it passes through the hollow space between
the Arches R. Figure 2. where it meets and effects combustion of the Carbonic Oxide,
and other combustible Gases, formed in the Combustion Chamber H. Figure 2. an
indentically similar arrangement of Air Flues are provided on either side of the
Furnace. A special feature in the invention consists in forming the air channels
for the secondary combustion of Incased Fire-Clay Pipes, or other materials, which
are laid, as above described, along the Crown of the Retort Chamber, down the back
wall, and along the floor of the Retort Chamber and are heated by the Furnace
which traverses in the reverse direction over the floor or along the flue space from
which the air conduits are separated by the brickwork as shown at I. Figures 1
and 2. The use of such pipes, or conduits, for conveying the air which is heated
in its course from the top, has the advantage that, leakage does not readily take
place. The pipes are so formed and placed, that access may be readily obtained at
any time for removal or repairs.

page_text: Another feature in the invention is, that the Retorts, and the "Regenerator," are
all under the oven arch, or in an individual setting, also, in the renewal of the
Retorts at any time, the air supply Conduits are not interfered with.
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
First. The construction of Furnaces having combustion chamber, and Arches, as
herein described and shown on the Drawings H. Figures 1, 2, and 3. U Figure 2.
for the purposes hereinbefore set forth.
Second. The arrangement of the Air flues L Figure 1. M. N. P. Figure 3 and
A. Figure 2. as herein described and shown on the drawings.