Improvements in the Manufacture of Gas.
Year: 1895

page_text: :
TROYIDIONAL SPECIFICATION.
Improvements in the Manufacture of Gas.
I, THOMAS GEORGE MCEWEN, of Mount Carron, Hainault Road, Leytonstone in
the County of Essex, do hereby declare the nature of this invention to be us
follows:-
:-
In the manufacture of gas according to this invention a closed furnace or producer
is employed-coal is fed in through an opening at the top and drops down
on to an incline from the bottom of which it passes on to a second incline below the
first and from this second incline on to a series of hollow fire bars. The hollow fire
bars are perforated on their under side and extend through the front of the producer
and are open at their outer ends. Air enters through these open ends and passing out
through the perforations rises up between the bars to combine with coke that is
burning upon them. As the coal descends the inclines it becomes highly heated and
gas is driven off from it until it arrives onto the fire bars in the form of coke. Fresh
coke constantly arriving onto the fire bars and replacing coke that has been burnt.
At each side of the fire bars is a vessel to contain mixed petroleum or other oil or
fat or it may be tar or the like and water.
The gas produced by heating these mixed substances in the closed vessels escapes
through perforated pipes and mixes with the hot gases rising up from the burning
coke. The mixed hot gases then rise up through the interstices in a chequer work
of fire brick carried by an arch which extends over the lower part of the lower
incline.
From the top of the chequer work it is made to pass between the top of the upper
incline and the top of the producer-and from thence over the coal on this incline
and down through a second chequer work pile of fire brick to an outlet.
A spray of hydrocarbon oil is delivered on to the top of this second chequer work
pile of fire brick to further enrich the gas any oil passing down to the bottom of the
pile is received into a tank at the bottom and can either be again delivered as spray
on to the pile of fire brick or used together with water in the vessels at the sides of
the fire bars.
The upper end of the lower incline may be supported on a perforated pipe through
which there may be a further addition of air.
Dated this 15th day of August 1895.
I, THOMAS GEORGE MCEWEN, of Mount Carron, Hainault Road, Leytonstone in
the County of Essex, 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 :-
In the manufacture of gas according to this invention a closed furnace or producer
is emploved.

page_text: Figure 1 is a central longitudinal section of such a furnace or producer and
Figures 2 and 3 are transverse sections on the lines 2-2 and 3-3 Figure 1
respectively.
Coal is fed in through an opening provided with a cover not shown at the top and
drops down on to an incline 6 from the bottom of which it passes on to a second
incline c below the first and from this second incline on to a series of hollow fire
bars d. The hollow fire bars are perforated on their under side and extend through
the front of the producer and are open at their outer ends. Air enters through these
open ends and passing out through the perforations rises up between the bars to
combine with coke that is burning upon them. As the coal descends the inclines it
becomes highly heated, and gas is driven off from it until it arrives onto the fire bars
in the form of coke. Fresh coke constantly arriving onto the fire bars and replacing
coke that has been burnt. At each side of the fire bars d is a vessel e in the form of
a saddle boiler to contain mixed petroleum or other oil or fat or it may be tar or the
like and water.
The gas produced by heating these mixed substances in the closed vessel e escapes
through perforated pipes in the fireclay blocks and mixes with the hot gases
rising up from the hurning coke The mixed hot gases then
interstices in a chequer work of fire brick g in the form of her rise up through the
the lower part of the lower incline.
extends over
From the top of the chequer work g it is made to pass between the top of the upper
incline and the top of the producer and from thence over the coal on this incline
and down through a second chequerwork pile of fire brick up through a chequer-
work pile of fire brick j and down through the pile k to an outlet l.
A spray of hydro carbon oil is delivered on to the top of the chequer work pile of
firebrick to further enrich the gas any oil passing down to the bottom of the pile is
received into a tank at the bottom m and can either be again delivered as spray on to
the pile of fire brick. or used together with water in the vessels at the sides of the
fire bars.
The upper end of the lower incline e may be supported on a perforated pipe
through which there may be a further addition of air, but preferably the air is
admitted through a perforated transverse tube n. o are pipes for introducing oil and
water into the boiler e.
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 :-
1. The manufacture of gas by heating together the products of combustion of coke,
the gas from coal and the gas from a mixture of water and petroleum or the like
substantially as described.
2. In the manufacture of gas causing coal to gradually descend through and
become coked by the products of combustion of coke previously so produced substan-
tially as described.
3. In the manufacture of gas the combination of a furnace, inclines above the furnace
down which coal is caused to descend into the furnace and chequer work blocks
through which the resulting gases pass substantially as described.
4. The manufacture of gas substantially as described.
5. Apparatus for the manufacture of gas substantially as described, and shown in
the drawings.