Year: 1887

page_text: I, HARRY WILLIAM PEROY NUGENT, of Vienna in the Empire of Austria, Engineer
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 state-
inent:-
This Invention has for its object to provide an improved furnace for gas-retorts and
the like and comprises the construction and heating of a recuperative retort setting,
and furnace in conjunction with a self sealing evaporating pan, whereby increase of
heat combined with economy in fuel is effected.
In the accompanying Drawing
"
Figure 1 is a longitudinal section of a furnace embodying my improvements.
Figure 2 is an elevation of the same partly in vertical section.
In this furnace the air required for combustion of the fuel, is pre-heated by tho
re-cuperation of heat from the exit flues of the chimney gases, the air is forced to
enter, through openings regulated by slides, into the short channels A, running under
the exit flues and back again under the fire bars where, mixed with steam from the
evaporating pan, it passes to the fire.
The evaporating pan B placed under the fire-bars extends to the front of the setting
and is so constructed that no cold air can enter to the fire-bars. This is obtained by
a self sealing dividing apron or diaphragm marked C, which is fixed in an air tight
manner to the pan and to the furnace door from or to any part of the setting. This
diaphragm C dips below the constant waterline 7, thereby forming a perfect seal, and so
forcing the air to enter only by the hot flues A, where it becomes immediately heated
and flows through openings to the fire-hars. The pan can at any time be cleaned of ashes
from outside, without the fire door being opened, by passing a bent shovel under the
seal plate. The pan is kept filled with water to the line by means of a water pipe
or otherwise. The part of the pan which reaches out in front of the setting is provided
with a tight fitting cover.
The secondary air required for the combustion of the carbonic oxide formed in the
furnace is not heated before entering the furnace, but is admitted over the coke fire
by the top fire door D or by any adjustable contrivance. The door D is made adjustable

page_text: by a screw E or otherwise. The air coming in contact with the burning coke is
immediately raised to the necessary temperature without affecting the fire as the heat
at this point is superabundant, then coming together with the carbonic oxide consumes
the same whereby perfect combustion is obtained. The products of combustion passing
on through the nostril holes, give off their heat to the firmly constructed setting.
The screw E enables the opening of the door D for introducing the secondary air,
to be regulated according to the quantity of carbonic oxide present.
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 arrangement of the recuperativo air flues working in conjunction with a
self scaling evaporating pan.
Second. The evaporating pan with its self sealing dividing apron or diaphragm fixed
in an air tight manner to the pan and to the door framing or to any part of the setting
and dipping below a constant waterline thereby forming a perfect seal.
Third. The admitting of the secondary air over the coke fires by an adjustable fire
door or other adjustable contrivance.
D
3
L
1000