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Патент USA US2113831

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April 12, ‘19381.,
Filed May '17, 1955
M's/vet. Eu/wy
maid Y
A’ T702 NE Y5
Patented Apr. 12, 1938
_ 2,113,831
Henri Dupuy, Paris, France
Application May 17, 1935, Serial No. 21,922
In Belgium June 15, 1934
2 Claims.
1 I’ This invention hasfor its object 'a process of
' combustion which is characterized by the utili
(Cl. 110—-32)
combustion. apparatus for the execution of the
process according to the present invention.
The apparatus illustrated in Fig. 1 comprises
a hopper T containing the fuel which may fall
Zationof the effects of gravity for automatically
feeding a furnace by means of a thin layer of
fuel and also by the relative displacement of . from a regulatable slide S upon the inclined plane
the ignition zone with respect to the mass of
A, which is provided with ?ve blast slots for
burnt'products. This makes it possible to have example O1--O5 which are fed by one and the
very long intervals of time beeween each removal
same air box V.
of said mass of burnt products.
At the beginning the slot 01 only is open and
‘According to a ?rst form of operation, the
the ignition takes place at the lower part of the
present process consists in causing the ignited apparatus.
zone to move gradually upwardly to the top of
In order to cause the gasi?cation of the'com
the furnace so as to leave the mass of clinker ' bustible and the production of solid clinker the
temperature is caused to rise to a very high de
Thelapparatus which is employed in this ?rst
form of operation is characterized by a fuel dis‘
charge inclined surface provided with a plurality
of air inlet openings which open successively from
the bottom 'up'wardly, the admission of air
20 through the lower openings being interrupted
when the coal in front of them has been com
, 'pletely replaced by the clinker.
This invention has also for its object a modi
?ed form of operation characterized by a solid
25. inclined surface upon which oneor more mov
able air blast nozzles move upwardly in the midst
of the coal.
‘In another form of operation the combustion
process according to the present invention con
30 sists in making the ignited zone stationary and
moving away the block of ashes and clinker pro‘
gressively ‘downwardly.
,With this object in view according to a pre
gree by means of a very strong or forced draught 15
preferably by means of the primary air which
has been pre-heated in the combustion ‘appara
tus itself this not being prejudicial to the output
considering that the calories taken out are given
back‘ and that'mechanical power may conse
quently be dispensed with.
The coal burning in front of the slot 01 pro
duces gases which will be utilized further on
after the adjunction of secondary air upon a
stack for instance and also produce a clinker
which settles under the action of the coal stream
which is fed by gravity from the hopper T. The
clinker remaining stationary this ?rst zone then
becomes inoperative, the opening .01 closes and
the opening 02 opens in the manner hereinafter
indicated. The ?re will consequently be in front
of 02. The fuel will continue to feed the ?re in
front of 02 until 03 opens, the zone 02 becoming
v'ferred form of operation, the apparatus com
inoperative and so on until the ?re which is now
prises a stationary air inlet nozzle at the upper
end of the inclined surface and a check shield
for the ashesand clinker which is movable upon
at O5 is still fed from the hopper and the lower 35
part of the inclined surface is covered over with
' said surface.
The driving means whichoperate the opening
and closing of the nozzle or primary inlet slots
and the displacement of the nozzle or the dis—
', placement of the check shield for the clinker is
advantageously operated automatically by the
intermediary of devices provided with a photo
electric cell or a thermostat and the like as.
hereinafter will be described byway of example.
The invention allows also in every case the use
of cold or hot air taken from the apparatusit
self instead of injected air, in order to avoid the
At that moment the cake of clinker may be
taken out after opening the door P and taking
out the bar B care being taken to close the slide 40
S. The fire will be kept up in front of 01 when
putting back the bar B; then the door P is closed
and the slide S is opened so that the coal will
then cover the inclined plane; 01 will again be
opened, 05 will be closed and the operation be
' gins again.
Supposing the distance from O1 to O5 to be
2 meters, the width of the apparatus to be 1'
meter and the coal layer to be .1 meter, the
use of mechanical power and of obtaining a
volume of the clinker cake would be .2 cubic
higher temperature of the furnace which facili
meter and consequently would weigh at least
tates the production of clinker and of gas.
Figs. 1 and 2 of the appended drawing are
' sectional diagrammatical views which show by‘
iway of examples two forms of operation of a
200 kgs.
If the residues of combustion are 10% this
gives a net weight of 2,000 kgs. for 20 days work
ing and a daily consumption of 100 kgs.
In that case the apparatus is therefore com—
pletely self-acting for a period of 20 days.
The primary air may be brought to the nozzle
by means of pivoted arms and corresponding
The above described process in which the spent
products are removed from the combustion zone
by moving back their support may be applied
to all systems of gas producers, with the result of
considerably increasing their life without requir
Fig. 2 of the appended drawing illustrates a
ing any cleaning and interruption of service; a
modi?ed form of construction of the apparatus
in which V is the air box along the upper edge
mission of air according to the required working.
of which may be placed a water circulationrtube
10 t designed to prevent corrosion and deterioration
by the clinker. The shield B which is supported
by means of a bar passing through the door P
may move back progressively when the incom
bustible mass of ashes and clinker M tends to ob
15 struct the admission of air. The operation will
proceed until the shield B reaches the door P.
At that moment the door having been opened
the clinker mass will be removed and the shield
moved upwardly preparatory for a new operation.
The self acting regulating means already men
tioned with respect to the valves and the air
nozzles may be employed for controlling the
downward movement of the shield. In this case
also it is preferred to use primary air which has
25 already been heated in the combustion apparatus
itself if the use of cold air is not su?icient.
On the other hand and in every case the in
clined surface A can be cooled by air or by Water.
71-] in Fig. 2 is a refrigerating water box. Said
surface could also be made of refractory ma
terials and the whole apparatus may advantage
ously be covered with nonconducting material.
It will easily be seen that the apparatus accordi
ing to the present invention is capable of doing
good service when used in combination with cen
tral heating furnaces in buildings of a certain
importance as it facilitates the service and the
stoking of the ?re and allows of dispensing with
constant personal attendance.
thermostat may be used for controlling the ad
What I claim and desire to secure by Letters
Patent of the United States is:
1. A combustion device for solid fuel furnaces
which comprises an inclined combustion surface,
a coal hopper placed above said surface and con
taining the solid fuel, means for precipitating a
layer of fuel by gravity from the hopper upon 15
said inclined surface, a stationary air nozzle
opening in the midst of the fuel at the top of the
inclined surface in order to insure combustion,
a plate movable relatively to the inclined surface,
and means whereby said plate may be moved 20
progressively downwardly relatively to the in
clined surface with the ashes and clinker pro
duced by the combustion and as the combustion
2. A combustion device for solid fuel furnaces 25
comprising an inclined combustion surface, a
coal hopper placed above said surface and con
taining the solid fuel, means for precipitating a
layer of fuel by gravity from the hopper upon
said inclined surface, stationary air nozzles blow 30
ing air in the midst of the fuel at the top of the
inclined surface; a plate movable relatively to said
inclined surface, and means whereby said plate
may be moved progressively downwardly rela
tively to the inclined surface with the mass of
ashes and clinker produced by the combustion
and as the combustion proceeds.
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