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Патент USA US2119581

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June 7, 1938.
T. F. SULLIVAN
2,119,581 -
COMBINATION FUEL BURNER
Filed'Jan. 28, 1936
1?.1
10
INVENTOR.
Thomas iiqsul/ivan
ATTORNEY.
.3.1
Prereiiunatiér"
'
i
L
.
z‘,119.581"""
~ UNITED .STATES PATENT oFFica __
, cormmnrron FUEL" BURNER
- Thomas F. Sullivan, Chicago, Ill., assignm- to The
Babcock a Wilcox Company, Newark, N. J.,._a
, corporation of New Jersey
' Application January 2a, 1936, Serial No..61,139 I
'
17 Claims.
(Cl.158-12) '
_
My present invention 1 relates in general to
downwardly ' diverging in two directions and
fuel burners adapted for eiiiciently burning a
divided into aseries of discharge nozzles IS. The
plurality of different ?uid fuels, either separately
nozzle-forming parts are proportioned and ar
or simultaneously.
ranged to provide a substantially uniform distrie
5
‘
The general object of my invention is the provision of. an improved fuel burner construction
bution of the fuel to the several nozzles, each of' 5
which terminates in a substantially rectangular
'
0f the type described, and more‘ particularly a discharge opening at the outer side of and spaced
combination fuel burner adapted for installation ‘from a corresponding tube i2. 'As installed,.each
in a furnace wall having a row of cooling ?uid -
1o tubes associated therewith. A further and more
speci?c object is thevprovision in a combination
fuel burner for pulverized and‘ gaseous fuels and
. embodying fuel dispersal devices for the pulver-
nozzle is preferably directly above 9. correspond- ‘
ingltube and the, longitudinal 'axis of the nozzle 10
discharge opening coplanar with the axis of the
corresponding tube, so that the discharge from
each ‘pulverized fuel nozzle would impinge upon
ized fuel, of improved means for supplying the the outer side of the corresponding tube Ill and
15 gaseous fuel.
_
‘
.
be divided thereby into two streams entering the- 15.
_ The various features of novelty which char-
acterize my invention are pointed outwith pare
ticularity in the claims annexed to and forming
. a part of this speci?cation. For a better under20 standing of the'invention, its operating advantaxes and- speci?c objects attained by its use,
reference should be had to the accompanying
furnace through the intertube spaces at the op
posite ‘sides‘of the corresponding tube. The tubes
would thus act as fuel dispersal devices for the
corresponding pulverized fuel nozzles, while at
the same time protecting the nozzles from over- '20
heating in view of their absorption of a substan'
' tial portion of the heat radiated from the furnace
drawing and descriptive matter in which I have ,- through the burner port.
illustrated and described preferred embodiments
2.6 of myinvention.
7
'
Of the drawing:
~
a
-
.
The describedipulverized fuel discharge parts.
described are enclosed by a casing 20 which ex- 25 _.
, ~
‘
'
.
'
.
tends outwardly from the boundaries of the fuel '-
-
Fig. 1 is a vertical section through a tube cooled . burner port and is connected to any suitable com
furnace arch in which is installed‘ alcombination fuel burner constructed in accordance with
30 my invention:
_
v
.
_
I
_
~
,
-
Fig. 3 is an enlarged sectional view of one 'of'the
gaseous fuel discharge members and fuel supply
to connection theretoz‘snd
‘'
> ,
Fig. 4 is a view similar to Fig. 2 of a half sec.tion of a modified burner construction.
,
will- ?ow not only around the ends of the-pulver- ‘I
ized fuel burner but also through the channelswo ‘
Fig. 2 is a section taken on the line 2--_-! of
F18- 1;
bustion air supply system, so that combustion air
2| formedbetween the pulverized fuel discharge
nozzles, andthen through the intertube spaces
therebelow.
_
_'
_
.
.
'
To avoid the‘ excessive wear which would occur
on the burner port tube portions due to the im- at
pingement of the pulverized fuel, these tube por
tions are provided at their outer sides with fuel
In Figs. 1-8 is'shown oneembodiment of. my
dispersal members 22 of any suitable heat and
improved combination fuel‘ burner arranged to
wear-resistant material. Each of the members
' 40 discharge downwardly through a horizontally ex-
tending tube‘cooled furnace wall, such as the
22 has its inner side shaped to fit the outer side‘ 40 _
of the'corresp'onding tube It and'its outer portion
'
arch of a steam boiler furnace. ' As shown, the , symmetrically tapered outwardly and rounded to
.
arch includes a row of transversely spaced tubes
provide a substantially equal division of the pul- '
II in the boiler circulation system with the in-
verized fuel stream impinging thereon.
4-5 tertube spaces closed by blocks ll. Some of the
‘
'_
According to ‘my invention alternate fuel dis- .45
blocks are omitted to form a rectangular port if
in the arch and across which the tubesv Ill 'ex-
persal members are employed as ?uid fuel dis- ,
charge manifolds. For this purpose such alter- '
tend in spaced relation, and through which the
hate members 22'. are made hollow and substan
, fuel and combustion air are downwardly dis50 charged into the furnace. __
-
The combination fuelburner comprises parts
for, discharging apulverized solid fuel, such as
‘pulverized coal, and other parts for discharging
a fluid fuel. such as natural gas. The pulverized
55 fuel burner parts consist ofv atip member ‘it
tially crescent-shaped in cross-section with their _
horn portions terminating at about the center 50
line of the'tube row andprovided with one or
more rows'of small discharge openings or ori?ces.
23 in the tips thereof, as shown in detail in Fig. 3.
At one end of each member'll' is connected 0.
_.
nipple 24 leading to a corresponding header II, as
2
.
'
"
‘
2,119,581
7 located in .the inner ends of alternate air pas‘
sages 2| and extending parallel to the corre
sponding member 22’. The opposite ends of the
headers 25 are connected to a tapering supply
duct 26 arranged within the air casing 20 and ex
ternally connected by a pipe 2‘! to a suitable
source of gaseous fuel. The fuel dispersal parts
22 and 22’ are supported on and held in thermal
contact with the corresponding wall tubes. The
10 pulverized 'fuel burner tip member‘ 55 is sup
ported at adjustable distances from the parts 22
and 22’ by lugs 28 on the nipples 26 and brackets
29 on the tip member connected by set screws 30‘,
as shown most clearly in Fig. 3.
15
With the fuel burner constructed and arranged
as described and employed for'the separate or
simultaneous use of pulverized coal and natural
gas, for example, the pulverized coal and primary
air will be discharged in. elongated streams
20 against the corresponding fuel dispersal devices
which divide each stream into two parts entering
the furnace ‘through the adjacent intertube
spaces. The division of the fuel streams and the
de?ection of each part into an adjacent second
25 ary air flow path insures an intimate and rapid
mixing of the fuel with the air required for1com
bustion before entering the'furnace, so that e?ec
tive short flame combustion is insured. When
30 natural gas is to be burned along with the pul
verized coal,‘ the jets of gas are discharged into
the issuing vstreams of pulverized coal and air
and rapidly mix therewith adjacent the furnace
wall, promoting the combustion of the coal par
arrangement ' eliminates coking and ignition of
the pulverized fuel in these spaces.
While in accordance with the provisions of the
statutes I have illustrated and described herein '
the best forms of my invention now known to
me, those skilled in the art will understand that
changes may be made in the form of the appa
ratus disclosed without departing from the spirit
of the invention covered by my claims, and that
‘certain features of my invention may sometimes 10
be used to advantage without a corresponding
use of other features.
5
I claim:
1. A fuel burner comprising a longitudinally
elongated fuel discharge nozzle, an elongated fuel
dispersal device arranged to receive the impact
of the fuel discharged from said_nozzle, said fuel
dispersal device being ‘hollow and having fuel
supply and a multiplicity of small fuel discharge
openings therein.
.
2. A combination fuel burner comprising a plu
rality of transversely spaced elongated pulver
ized fuel discharge nozzles, transversely spaced.
longitudinally elongated fuel dispersal devices
arranged to receive the impact of the pulverized
fuel discharged from corresponding nozzles, said
fuel dispersal devices being hollow and having a
multiplicity of small fuel discharge openings
therein, and means for supplying gaseous fuel to
said hollow fuel dispersal devices.
-
3. In a furnace wall having a fuel burner port
formed therein, a fuel burner arranged to dis
charge fuel through said burner'port comprising
a longitudinally elongated fuel discharge nozzle,
When gas alone is burned, the gas jets ‘ an air supply casing surrounding said nozzle and
mix with the streams of secondary air passing ' opening to said burner'port, an elongated fuel‘
35 ticles.
through the corresponding intertube spaces. In
either case, the use of a multiplicity of small gas
jets will promote the mixing action and insure the _
40 desired type of combustion.
In the modi?ed burner construction shown 'in
is
Fig. 4, the pulverized fuel burner nozzle tip mem
ber I5 is divided vinto a lesser number of widely
spaced nozzles 40, which terminate in elongated
rectangular discharge openings at the outer side
of and spaced from tube protectors ‘forming the
dispersal device extending across said burner port
and arranged to receive the impact of .the fuel
discharged from said nozzle, said fuel dispersal
device being hollow and having fuel ‘supply and
a multiplicity of small fuel discharge openings ,1
therein.
.
'
4. In a furnace wall having a fuel burner port
formed therein, a combination fuel burner ar
ranged to discharge fuel through said burnerport
comprising a plurality of transversely spaced lon
gitudinally elongated pulverized fuel discharge
gaseous fuel manifolds 22', which are mounted on nozzles, an air supply casing surrounding said
alternate wall tubes Ill and constructed and ar ‘nozzles and opening to'said burner port, trans
ranged as previously described. ‘With the fuel versely spaced elongated fu'el dispersal devices ,
50 burner nozzles directed only against tube pro- .
extending across said burner port and arranged
tectors on alternate tubes, the divided'pulverized
fuel streams from the nozzles will enter the fur
nace through separate intertube spaces. Tube
protectors 4| are installed on the wall tubes inter:
55 mediate. the gas manifolds 22'. The tube pro
tectors 4| are hollow, each having a concave
inner plate 42 ?tting against the outer side of
the corresponding tube, and a. hyperbolic outer
' plate 43 extending into the space between adja
.to receive the impact of the pulverized fuel dis- charged ‘from corresponding ‘nozzles, said fuel ‘
dispersal devices being ‘hollow and having ‘fuel '
supply and a multiplicity of small fuel discharge
openings therein. ‘
_
5. In a furnace, wall having a fuel burner port
formed therein, a combination fuel burner ar
ranged to discharge fuel through said burner port
cent fuel nozzles 40 and its sides substantially comprising a plurality of- transversely spaced
parallel .to the adjacent nozzle sides. This ar , pulverized fuel discharge nozzles, an air supply 1
rangement provides a directional discharge of ” casing surrounding said nozzles and opening'to
secondary air through the burner port and also said‘ burner port, transversely spaced fuel dis;
a uniform increase in velocity down to the burner persal devices extending across said burner port
.65 intertube spaces. The plates 42 and 43 are tack and arranged to receive the impact of the pulver
' welded together and to the corresponding tubes.
,The tube protectors 4| are filled with suitable
‘heat insulating material 44, such as asbestos, to
maintain a temperature on the plates 43 lower
70 than the wall temperature of the tubes ill. The
gas manifolds 22' have provisions for air venting
and thereby cooling of the same during pulver-v
ized fuel or'idle burner operation. The lowered
temperature inthe spaces between and at the
75 outer sides of the wall tubes resulting from this
ized fuel discharged from corresponding nozzles,
said fuel dispersal devices being hollow and hav
ing a multiplicity of small fuel discharge open
ings therein, and gaseous fuel conduits positioned
between said nozzles and connected to said hollow
fuel dispersal devices. ‘
‘
6. In amfurnace wall having a fuel burner port
formed‘ therein and a cooling‘fluid tube extending
across said burner port, a fuel burner arranged to
discharge fuel through said burner port compris
1:3
f , 2,119,681
. ing a fuel discharge nozzle- terminating at the
outer side of and with its axis of discharge inter
secting the axis of said tubes, an air supply cas
ing surrounding said nozzle and communicating
' with said burner port, a tube protectorextend-v
ing along the outer side of said tube and arranged
to receive the impact of the fuel discharged from
' said nozzle, said protector being hollow and hav
11. In a furnace wall having a fuel burner port
formed therein and a series of transversely spaced
tubes extending across said burner port, a combi
nation fuel burner arranged to discharge fuel
through said burner port comprising a plurality
of transversely spaced pulverizedfuel discharge
nozzles terminating in elongated discharge open
ings at the outer side of and with their ‘longi
ing fuel supply and discharge openingstherein.
tudinal axes coplanar with the axes .of corre
'i. In a furnace wall having a fuel burner'port
10
formed therein and a cooling ?uid tube extend
said nonles and communicating with the spaces
sponding tubes, an air supply casing surrounding
ing across said burner port, a combination fuel
burner arranged to discharge fuel through said
burner port comprising a pulverized fuel dis
15 charge nozzle terminating at the outer side of and
with its axis of discharge intersecting the axis of
said tube, an air supply casing surrounding said
nozzle and communicating with said bmner port,
between said tubes, tube protectors extending
‘along the outer sides of said tubes and arranged
to receive ‘the impact of the pulverized fuel dis
' - said protector being'hollow and having fuel dis
wall cooling tubes extending across said burner
port, a combination fuel burner arranged to dis
charged from corresponding nozzles, said tube 16
protectors being hollow and having fuel discharge
openings at opposite sides of the corresponding
tubes, and means for supplying gaseous fuel to
a tube protector extending along the outer side ' said hollow tube protectors.
12. In a furnace wall having a ‘fuel burner port 20
20 of said tube and arranged to receive the impact of the pulverized fuel discharged from said nozzle, formed therein and a series of transversely spaced »
charge openings at opposite sides of said tube, and
means for supplying gaseous fuel to said hollow
25
tube protector.
.
a
8. In a furnace wall having a fuel burner- port
formed therein and a cooling ?uid tube,extending
80
as
40
45
60
charge fuel downwardly through said burner port
comprising a diverging pulverized fuel no'zzle 25
member divided into a plurality of transversely
spacedfuel discharge nozzles terminating in elon
gated discharge openings at the outer side of and
across said burner port, a combination fuel bum
-with
their longitudinal axes coplanar with the
er arranged to discharge fuel through said burner
axes of corresponding tubes, an air supply casing 30
port comprising a pulverized fuel discharge nozzle ,surrounding
said nozzles and communicating with
terminating in an elongated discharge opening ' the spaces between
tubes,- tube protectors ex
at the outer side of ‘and with its longitudinal axis tending along the said
outer
side of said tubes and
coplanar with the axis of said tube, an air supply arranged to receive the impact
of the pulverized
casing surrounding said nozzle and communicat
fuel discharged from corresponding nozzles, al .35
ing with said burner port, a tube protector ex
ternate tube protectors being hollow and having
tending along the outer side of ‘said tube and ar
fuel discharge openings at opposite sides of the
rangedvtoreceive the impact of the pulverized‘ corresponding
tubes, and gaseous fuel conduits
fuel discharged, from said nozzle, said protector positioned between said "nozzles and connected to ‘
being hollow and having fuel discharge openings said hollow tube protectors; '
40
at opposite sides of said tube, and means for sup
13. In a furnace wall having a fuel burner port.
plying gaseous fuel to said hollow tube protector. formed therein and a'series of transversely spaced
9. In a furnace wall having a fuel ‘burner port wall cooling tubes extending across said burner
formed therein and a series of transversely spaced port, a gaseous fuel burner arranged to discharge
cooling tubes extending across said burner port, fuel through said burner port comprising a plu
a combination fuel burner arranged to discharge rality of transversely spaced hollow metallic fuel 46
fuel through said burner port comprising a plu
discharge membersextending along the outer
rality of transversely spaced pulverized fuel dis side of and separate from corresponding tubes
charge nozzles terminating at the outer side of and each of said fuel discharge members hav
and with their axes of discharge intersecting the ing portions terminating at opposite sides of said
longitudinal axes of corresponding tubes, tube corresponding tubes, and a series of small fuel
protectors at the outer side of said tubes and ar
discharge openings in the inner ends of said
ranged to receive the impact of the pulverized
fuel discharged from corresponding nozzles, said
14. In a furnace wall having a fuel burner port
tube protectors being hollow and having fuel
56 discharge openings therein, and means for sup
plying gaseous fuel to said hollow tube protectors.
10. In a. furnace wall having a fuel burner port
formed therein and a series of transversely spaced
, cooling ?uid tubes extending across said burner
80 port, a combination fuel burner arranged to dis
charge fuel through said bumer port compris
ing a plurality of transversely spaced pulverized
fuel discharge'nozzles terminating at the outer
side of and. with their axes of discharge- inter
.65 secting the longitudinal axes of corresponding
tubes, an air supply casing surrounding said
nozzles and communicating with the spaces be
tween said tubes, tube protectors 'at the outer side
of said tubes and arranged to receive the impact
70 of- the pulverized fuel discharged from corre-_
sponding nozzles, said tube protectors being hol
low and having fuel discharge openings therein
at opposite sides of the corresponding tubes, and
means for supplying gaseous fuel to said hollow
,
75 tube protectors. [
_ formed therein and a series of transversely spaced ‘
wall cooling tubes extending across said burner
port, a gaseous fuel burner arranged to discharge
fuel through said burner port comprising a plu
rality of transversely spacedhollow metallic fuel
discharge members extending along the outer
_ side of, and separate from corresponding tuba
and ‘each of said fuel discharge members hav- -
ing portions terminating at opposite sides of said
corresponding tubes, a series of small fuel dis
charge opening in the inner ends of said ‘por
tions, an air supply casing surrounding said fuel
burner and opening to said burner port, and
gaseous fuel conduits connected to said discharge
.members.
>
15. In a furnace wall having a fuel burner port
formed therein and a series of transversely spaced 70
wall cooling tubes extending across said burner
port, a gaseous fuel burner arranged to discharge
fuel downwardly through said burner port com
prising a plurality of transversely spaced cres
cent-shaped hollow fuel discharge members ex 75
2,119,581‘
tending along the outer side of and separate from
corresponding tubes and each of said fuel dis
charge members having portions terminating at
'opposite sides of said corresponding tubes, fuel
discharge openings in the inner ends of said por
tions, an air supply casing surrounding said fuel
burner and opening to said burner port, 'a fuel
supply header in said air casing extendingtrans
versely of said discharge members, and gaseous
fuel conduits connecting said header to said dis
charge
membersl
.
>
r
I
'
16. In a furnace Wall having a fuel .burner
port formed therein and a series of transversely
spaced tubes extending across said burner port,
15 a combination fuel burner arranged to discharge
fuel through said burner port comprising a plu
rality of transversely spaced pulverized fuel dis
charge nozzles terminating at the outer side of
and with their axes of discharge intersecting the
longitudinal axes of corresponding alternate
tubes, an air supply casing surrounding said noz
zles and communicating with the spaces between
said tubes, tube protectors at the outer side of
said alternate tubes and arranged to receive the
2.5 impact of the pulverized fuel discharged from
corresponding nozzles, said tube protectors be
ing hollow and having discharge openings at up
posite sides‘ of the corresponding tubes, and
means for supplying gaseous fuel to said hollow
tube protectors.
'
_
3
.
17. In a furnace wall'having a fuel burner ‘port
formed therein and a. series of transversely spaced
tubes extending across said ‘burner port, a com
bination fuel burner arranged to discharge fuel
through said burner port comprising a plurality
of transversely spaced pulverized fuel discharge
nozzles terminating at the outer side of and with 1(1
their axes of discharge intersecting the longi
tudinal axes of corresponding alternate tubes,
an air supply casing surrounding said nozzles’
and communicating with the spaces between said
tubes, tube protectors at the outer side of said 15
alternate tubes and arranged to receive the im
pact of the pulverized fuel discharged from cor
responding nozzles, hollow tube protectors at the
outer side of the tubes intermediate said alter
nate tubes, said last mentioned tube protectors
extending outwardly beyond said ?rst mentioned
tube protectors and having their sides parallel
to the sides of the adjacent fuel nozzles, and
heat insulating material ?lling said hollow tube
protectors.
THOMAS F. SULLIVAN.‘ 2?
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