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Патент USA US2113846

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' April 12, 1938.
D. VAN L_Aw
.2»H3’846
BURNER SUPPORT v>yAND BURNER FOR FURNACES
Filed Jan. 23, 1934
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INVENTOR.
ATTORNEY.
2,113,846
Patented Apr. 12, 1938
4if,§@UNirEo’STATES
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PATENT voFFlcE» Í _
2,113,846
BURNER SUPPORT AND BURNER FOR
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FURNACES
Durbin Van Law, Denver, Colo., assignor to
Powderco, Inc., Denver, Colo.
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Application January 23, 1934, Serial No. 707,909
(Cl. 110-28)
6 Claims.
t.
` . This invention relates to retorts for furnaces,
its primary-object being to provide apparatus for
the `introduction and'ignition of powderedfuel,
which as an entirety, can‘be placed in operative
relation to a furnace of .conventional construc
" tion, by insertion in the opening vthereof normally
4closed by the fire door.
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crease the. heat in the combustion: chamber of
thefurnace, whereby. `to Obtain substantially
complete.. combustion of the fuel stream at the
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A furtherobject of the invention is to provide
in apparatus of the above described character
means to effect turbulence of a stream of second
ary air.,drawn._down- intothe furnace; and still
' " other objects arev to. be found in details of con
2o
'I'his inner end wall has a central openingv I2,
and aroundvthe same, smaller apertures I3 for
the admission of secondary air. Extending >into
and. through the central opening is the burner 15
proper which consists of a block `I4 of refrac
tory material, having _an axial passage I5 _which
atlits outer end, connects with a conduit I6
through> which fuel-carrying air-currents are
ments 'andcombinationsof parts, all of which
will. be clearly broughtout inthe course of the
suitablesource of supply.
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accordance'with- the ¿present invention, is in
serted intheiire-opening of the furnace, .
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».flE'i'gurefZfis' an yenlarged vertical section ofthe
furnace, inclusive. of the burner-unit,
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1 VFigure. 3 is a face. view of the unit looking from
within _the furnace in the direction of the ar
t@ __`__Figure.,.4`is a'section along the line 4-_4 of
Figure 2, '
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_ Figure 5__is _a vertical. section of. the inner por~
_tionof the burner-uniudrawn _to .an enlarged
_ ~scale on the line 5-"-5. of Fig. 3, and
`Figureö is a__sectio_1f1al__ ew. of the apertured
plate> of _ theunit by which secondary air is ad
mitted‘to the .furnace-_
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' >'I‘heQi‘urnace as shownV at 4 is of the type com
monl‘yfused' for, heating; rdwellings and@ other
furnacehasyas usual,v an vasn-opening 5,*,ordi
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establishments of. comparatively 'small size, The
. ríarily closed by a doorfß, and _a fire-opening 1.
The door which'fin‘thejiordinary use of the fur
nace__cl_oses the nre-opening, is.v talçe1f1___away for
the _application of the burner-unitY in accordance
' with the present invention.
’_I’he unit, asbest shown in Figure 5, comprises
'ajflanged box 8 which’fits'dnto the fire-opening
5.o
plane when the box is in its operative position.
supplied to the furnace from a mill I'I, or other 20
»Inithe.accompanyingdra -' g, in the several
views of~ which like parts are similarly designated,
Figure 14 is .an elevation. of a furnace, in con
nectionfwith a mill >by, .which fuel-carrying air
currents are directed'to a burner-unit which, in
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struction`~ and novel and advantageous arrange
followingdescription.
"45.
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The inner wall I0 of the box extends in a plane
slanting with relation to the body portion of
the box and facing downwardly in an inclined. l0.
tionÁ with. apparatus of. the above stated »charac
'10; ter, _refractory means to concentrate and in
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in Figure 2 of the drawing. It is to be under
stood, however, Vthat other _fastening ymeans,
such as bolts, may be employedto hold the box
in place.
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. .Anotherîobject resides in providing in associa
maximumgtemperature.
the box engages the outer wall of the furnace, l -`
and thebox may be fastened in place by a rim
of cement applied over the flange as shown at 9
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. Within the passage, preferably adjacent the
end of .the conduit I6, is a whîrler I8 adapted to
impart a whirling. motion to the entering air
currents.
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Embedded in the wall of the burner-block are
two electrodes I9, the tips of which are spaced
inside the flaring inner end portion of the pasf
sage to provide a spark-gap 20 by which in the
operation, the fuel carried by the >air-currents is eo
initially ignited. The electrodes .are connected
`in circuit witha source of electric current as in-A
dicated .at 2I in Figure 1.
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‘ Around the portion of the burner-block pro
jecting through the central opening of the end .3.5
plate IIJ of the box 8 _is a circumferentially
ñanged vplate 22, spaced from the wall I0, to
provide anarrow chamber 23 to receive the sec
ondary air-currents drawn into the furnace
through the apertures ._I3. _ The plate 22 has a
central opening throughwhich the end. of the ‘ ‘
burner-block projects, and it has around this
opening a circular series of slanting vanes 24
formed by .cutting U-shaped slits in the metal
of which the plate is composed and bending the _
stripswithin the slits outwardly as best shown
in
Figure
6.
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Theouter surface of the plata' around the
series of vanes, is preferably covered _with a
layer 25 of refractory clay or other sirnilar'm_a--l '
terial. The vanes 24' function as va whirler-ele
ment to impart a whirling motion to the second.4-->
ary’airecurrents vas they enter the- combustion
chamber ofthe furnace. It will be seen that
of thefurnace; a' flangey y80a .at _the _outer _end of owing to the Aslanting position of the end4 plate Il)A
2
2,113,846
of the box 8, the axis of the passage l5 in the
burner-block I4 extends slantingly with relation
to the vertical axis of the combustion chamber
26 of the furnace, so that the fuel-carrying air
currents enter the furnace through the passage
of the burner-block in a downwardly inclined
stream.
Opposite to the end plate of the box 8 is a
baffle plate 2ï of refractory material whose prin
10 cipal function is to reñect the heat into the coal
stream.
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fractory plate located in the combustion chamber
in the path of the fuel stream.
2. The combination with a furnace having a
combustion chamber `and a fire-opening for the
supply of fuel to the chamber, of a burner-unit
comprising a box in the fire-opening, open at its
outer end and having an inner end wall slant
ingly facing downwardly and located in the com
bustion chamber, the end wall having an aperture
for a burner-block and an aperture for the ad 10
" mission of secondary air to the combustion
The refractory coating 25 of the plate 22 has a
similar effect.
In the operation of the furnace both the bañle
15 and the coating are heated, and the radiant heat
chamber, ‘a burner-block in the ñrst-mentioned
aperture having a passage substantially perpen
dicular to the end wall for the entry of down
being reflected into the fuel stream produces a
the combustion chamber, and a plate spaced from
the end wall to provide a chamber to receive the
secondary air, said plate having an opening
through which the burner block extends, and
high temperature with a correspondingly high
degree of combustion. The whirling motion im
parted to both the fuel-carrying air-currents
20 and the secondary air by the two whirler ele
ments produces dissemination of the fuel inside
the combustion chamber, which exposes each
particle thereof to the heat after initial ignition
as it passes the spark-gap 20.
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The secondary air within the chamber 23, more
over, has a cooling effect to prevent the metal
parts from being detrimentally affected by the
heat of the furnace.
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wardly directed fuel-carrying air-currents into 15
openings. surrounding the burner block.
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3. 'I‘he combination with arfurnace having ay
combustion chamber and Va fire-opening for the
supply of fuel to the chamber, of a burner-unit
comprising a box in the nre-opening, open at its
outer end and rhaving an inner end wall slant 25
ingly facing downwardly and located in the com
bustion chambenthe inner end wall having an
aperture for a burner-block and an aperture for
The downward direction of the fuel stream as
30 it enters the furnace gives to the fuel the benefit
the admissionof secondary air to the combustion
of the entire extent of the combustion chamber.
aperture having a passage for the entry of down
wardly directed fuel-carrying air-currents into
The fuel in this manner is fed against a rela
tively still body of air in the lower portion of
the chamber, causing the flames tospread across
35 the chamber. The result of this spreading effect
and the reflective properties of the baiiie and the
coating of the plate 22 is the production and
maintenance of a radiant heat of high tempera
ture resulting in rapid and substantially com
40
plete combustion.
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It is a Idistinctive feature of the invention that
the-unit, mounted and assembled as an entirety,
is readily slipped into the fire-opening after the
door thereof has been removed, and is then fas
45 tened in place. The application of the device
therefore requires no alteration in the construc
tion of the furnace whatsoever, with the possible
exception of the provision of the slanting baffle
plate 21, which, as, shownV in» the drawing, ex
50 tends to the floor of the furnace and Yterminates
at a distance from the ash-opening so as not to
interfere with the removal of the ashes.
It is to be understood that in using the term
chamber, a burner-block in the first-mentioned 30
the combustion chamber, and a plate I spaced
from the en-d wall to provide a chamber to re
ceive the secondary air, said plate having an open
the combustion chamber.
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.4. VThe combination with a furnace having a
combustion chamber and a fire-opening for the
supply of fuel to the chamber, of a burner-unit
comprising a box in the lire-opening, open at its
outer end and having an inner end Wall slant
ingly facing downwardly and located in the com 45
bustion chamber, the inner end wall having an
aperture for a burner-block and an aperture
for the admission of secondary air to the combus
tion chamber, a burner-block in the Vfirst-men
tioned aperture having a passage for the entry
of downwardly directed fuel-carrying air-currents
into the combustion chamber, a plate spaced from
the end wall to provide a chamber to receive the
“furnace” in the foregoing description and the
secondary air, said plate having an opening
55 hereunto appended claims are included not only
heating devices, such as are used in residences
through which the burner block projects and a
coating of refractory material upon the outer
and other similar establishments, but also small
boilers and other devices used for other than
heating purposes.
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What I claim and desire to secure by Letters
Patent is:
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1. The combination with a furnace having a
combustion chamberand a fire-opening for the
supply of fuel to the chamber, of a burner-unit
65 comprising a box in the fire-opening, open at
its outer end and having an inner end wall slant
ingly facing downwardly and located in the com
bustion chambentheinner end wall having an
f aperture for a burner-block and an aperture
70 for the admission of- secondary air to the com
bustion chamber, a burner-block in the first
mentioned aperture having a passage substan
tially perpendicular to the end wall for the entry
35
ing through which the burner block projects and
openings having slanting vanes for causingvtur
bulence of the secondary air uponfits entering
surface of the plate.
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5. The combination with. a furnace having a
combustion chamber and a fire-opening for the ..
supply of fuel to the chamber, of a burner-unit 60
comprising abox in the fire-opening, open at its
outer end and having an innerrend wall slant
ingly facing downwardly and located in the com
bustion chamber, the inner endwall having an
aperture for a burner-block and an aperture for
the admission of secondary air to the combustion
chamber, a burner-block in the first-mentioned
aperture having a passage for the entry of down
wardly directed fuel-carrying air-currents into
the combustion chamber, a plate spaced from the
end wall to provide a chamber to receive the sec
ondary air, said plate having an opening thru
which the burner block projects, a coating of re
_, of downwardly directed fuel-carrying air-cur
fractory material upon the. outer surface of the
rents into the combustion chamber, and a re
plate, and a baille of refractory material opposed
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2,113,846>
to said coating and in the path of the fuel stream.
6. A burner unit for use with a furnace having
a fire-opening, comprising a box-like member,
for insertion into the opening, open at its outer
end and having an inner Wall which siantingly
Yfaces downwardly when it is in position, the inner
wall being provi-ded with an opening, a fuel noz
3
zIe comprising a burner-block projecting thru the
opening, the inner wall being also provided with
an opening for the admission of auxiliary air,
and means located on the outer side of the inner
wall for imparting a whirling motion to the aux- 5
iliary air.
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DURBIN VAN LAW.
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