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Патент USA US2111605

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March, 22, 1938.
J, s_ BENNETT
2,111,605
FURNACE WALL
Filed NOV. 21, 1935
2 Sheets-Sheet l
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March 22, 1938.
J, s‘ 'BENNETT'
2,111,605
FURNACE WALL
Filed NOV. 21, 1935
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2,111,605
Patented Mar. 22, 1938
UNITED STAT
2,111,605
FURNACE WALL
Joseph S. Bennett, Merion, Pa., assignor to Amer
ican Engineering Company, Philadelphia, Pa.,
a corporation of Pennsylvania
Application November 21, 1935, Serial No. 50,834
5 Claims.
(Cl. 122-235)
more particularly to furnace walls of the ?uid
Header 24 is connected to boiler drums 3 and ‘I
by a series of uptake connections 29, while head
cooled type. One object of the present invention
ers 25 and 2‘! are connected to the lower drum 4
This-invention relates to furnace walls, and
is to provide in furnace walls of the stated char
5 acter, generally improved means for diverting the
molten slag ?owing down the walls away from"
the portions thereof adjacent the fuel bed.
A more speci?c object is to provide in ?uid
cooled walls of the vertical tube type, slag divert
of the boiler by downtake connections 30 and 3I
respectively.
CH
Stoker 3 is of usual construction, and consists
of a combustion grate 32 to which fuel from‘ a
hopper 33 disposed at the front of the stoker is
fed by any suitable feeding means driven by a
power mechanism indicated at 34. The usual 10"
10 ing means consisting of one or more ?uid con
extension grates 35 are provided toward the rear
ducting tubes for diverting the molten slag flow
end of the stoker which feed the consumed fuel
ing down the walls away from the lower areas
into the ash pocket 28. The portion of the side
thereof adjacent the fuel bed.
Other and further objects will become apparent wall I6 adjacent the stoker and ash pocket may
be provided with protective blocks 36 to protect
15 as the description of the invention progresses.
the tubes against the abrasive action of the fuel.
Of the drawings:
Fig. 1 is a longitudinal sectional view taken These blocks also present a smooth continuous
through a boiler furnace, showing the preferred surface to the fuel bed. Portions of the front and
embodiment of my invention applied to one of rear walls I4 and I5 respectively may likewise
be provided with protective blocks if it is so 20'
20 the side walls thereof.
. Fig. 2 is an end sectional view taken substane desired. In order to prevent slag from coating
the area of the side walls adjacent the'stoker or
tially along line 2—2 of Fig. 1.
Fig. 3 is an end View partly in. section taken ash pocket a series of slag diverting tubes 31 are
provided. These tubes‘ are connected at their
along line 3—3 of Fig. 1, and
Fig. 4 is a longitudinal sectional view taken upper ends to the right hand end of header 24 and
N Cr
incline downwardly toward the rear of the fur
through a boiler furnace showing a modi?ed con
nace in substantially parallel relation with stoker
struction.
3 and terminate at their lower ends in header 21.
Referring to the drawings, the numeral I desig
These tubes lie in substantially abutting rela
nates generally a furnace comprising a boiler 2
tion with the vertical tubes 23 and 26 of wall I6, 30
?red
by
a
multiple
retort
underfeed
stoker
3
of
a
30
well known type. Boiler 2 is of a well known and are disposed slightly above'the block covered
construction and consists of a lower drum 4, and areas thereof. It therefore is seen. that any slag
upper steam drums 5, 6 and l interconnected by ?owing down the wall will engage tubes 31 and
pipes 8 and 9. Drums 5, 6 and l are respectively be diverted away from the block covered area
thereof and into the fuel bed supported on stoker 35
35 connected to the lower drum llby the usual pipes
Ill, II and I2. The combustion chamber I3 of 3. Partitions or baffles 38 and 39 may be pro
the furnace is bounded by front and rear water vided in header 23 between tubes 23 and 26, and
walls I4 and I5 respectively, and side walls IS. between tubes 23 and 3‘! respectively, if it is so
The tubes I‘! of front wall I4 terminate at their desired, to insure proper circulation in the system‘.
Fig. 4 shows a somewhat modi?ed side Wall con
40 lower ends in a header I8 disposed above the
As therein shown, the side wall I6’
'struction.
stoker 3. The upper ends of tubes I'I form an
arch I9 and terminate in steam drum‘ ‘I. The consists of a series of substantially vertical tubes
tubes 20 of rear wall I5 terminate at their lower 23’ connected at their upper ends to an upper
ends in a header 2|, and at the upper ends thereof header 24' and at their lower ends to a lower
45 in drum 4. A downtake connection 22, connecting header 25’, and a series of longer tubes 26' con 45
header 2| to drum 4, completes the circulatory nected at their upper ends to header 24' and
system for the rear water wall I5. The side Walls at the lower ends thereof to a header 21'. In this
I6 comprise a series of vertically disposed tubes construction a single tube 31' is provided to divert
the molten slag ‘flow down the wall away from
23 connected at one end to an upper header 24
the lower areas thereof. This tube comprises a
50 and at the other end to a lower header 25 dis
posed beneath the stoker. The side wall I6 also vertical portion 48 connected at the upper end
comprises a series of longer tubes 26 connected - thereof to the header 24', an inclined portion III
at their upper ends to header 24 and at their lower disposed above the stoker 3' and in substantially
parallel relation therewith, and a second vertical
. ends to a header 21 disposed adjacent the lower
portion 42 disposed at the extreme left hand side 55
55 end of the ash pocket 28 at the rear of stoker 3.
2
2,111,606
of the ash pocket 28' which terminates at the
lower end thereof in header 21’. In certain in
stallations it might be desirable to provide bare
tubes throughout, as shown in Fig. 4. However,
by providing a slag diverting tube such as 31’ any
slag ?owing down the wall is diverted away from
the areas thereof adjacent the stoker and ash
pocket, and as a result no slag formations will
occur on the tubes disposed adjacent those areas.
10
The slag diverting means provided on the walls
of the furnace just described, are simple in con
struction and form a portion of the steam gen
erating system.
The headers for the side walls
proper are also utilized to accommodate the
15 tubes of the slag diverting means.
1 The constructions herein described therefore
are not only e?icient in operation, but are eco
nomical in manufacture.
While the embodiments herein described are
admirably adapted to ful?ll the objects primarily
stated, it is to be understood that the invention
is not to be limited thereto since it may be em
bodied in other forms, all coming within the
scope of claims which follow.
25
What is claimed is:
1. In a furnace. the combination with an in_
clined grate stoker, of an ash pocket disposed at
one end of said stoker, a wall disposed in sub
stantially abutting relation to said stoker and
30 ash pocket, said wall comprising a series of sub
stantially vertical tubes, upper and lower headers
for said tubes, a series of protective blocks for
said tubes covering the areas thereof adjacent
said stoker and ash pocket, and means compris
35. ing one or more tubes operatively connected to
said headers and having a portion thereof dis
posed above said block covered area and lying in
substantially abutting relation with said vertical
tubes for diverting any molten slag ?owing down
to
said wall away from the block covered area
thereof, and a portion of said last mentioned
tubes lying in substantially parallel relation with
said stoker.
2. In a device of the class described, the com
45 bination with a furnace wall comprising a series
vof substantially vertical ?uid conducting tubes,
of substantially horizontal upper and lower head
ers for said tubes, one or more ?uid conducting
tubes connected to and depending from one end
50 of said upper header and extending transversely
of said ?rst mentioned tubes and lying in sub
stantially abutting relation therewith for divert
ing any molten slag ?owing down said wall away
from the lower extremities thereof, said last
55 mentioned tubes terminating at the lower ends
thereof in said lower header, and means for sup
plying ?uid to said lower header.
3. In a device of the class described, the com—
bination with a furnace wall comprising a series
60 of substantially vertical ?uid conducting tubes,
of upper and lower substantially horizontal
headers for said tubes, protective blocks mounted
on the lower portions of said tubes, one or more
?uid conducting tubes connected to and depend
ing from one end of said upper header and ex
tending transversely of said ?rst mentioned tubes
above the block covered portion thereof, and
lying in substantially abutting relation with re
spect to said tubes ?rst named, for diverting any
molten slag ?owing down said wall away from 10
the block covered portions thereof, said last
mentioned tubes terminating at the lower ends
thereof in said lower header, and means for
supplying fluid to said lower header.
4. In a furnace, the combination with an in 15
clined grate stoker, of a wall disposed in sub
stantially abutting relation with said stoker, said
wall comprising a series of substantially vertical
?uid conducting tubes, substantially horizontal
upper and lower headers for said tubes, a series 20
of protective blocks for said tubes covering the
areas thereof adjacent said stoker, one or more
?uid conducting tubes connected to and depend
ing from one end of said ,upper header and ex
tending transversely of said ?rst mentioned tubes 25
above the block covered area thereof and lying
in substantially abutting relation with respect
to said tubes ?rst named, whereby any molten
slag ?owing down said wall will be diverted away
from the block covered area thereof and onto said 30
stoker, said last mentioned tubes terminating at
the lower ends thereof in said lower header, and
means for supplying fluid to said lower header.
5. In a furnace, the combination with an in
clined grate stoker, of an ash pocket disposed .
at one end of said stoker, a wall disposed in sub
stantially abutting relation with said stoker and
ash pocket, said wall comprising a series of sub
stantially fvertical ?uid conducting tubes, an
upper header for all of said tubes, a lower header 4.0
for the said tubes lying adjacent said stoker, and
a second lower header for the said tubes lying
adjacent said ash pocket, a series of protective
blocks for said tubes covering the areas thereof
adjacent said stoker and ash pocket, one or more
?uid conducting tubes secured to and depending
from one end of said upper header, and extending
transversely of said ?rst mentioned tubes in sub
stantially parallel relation with said stoker, said
last mentioned tubes lying in substantially abut~
ting relation with said ?rst mentioned tubes and
above the block covered areas thereof, whereby
any molten slag‘ ?owing down said wall will be
diverted away from the block covered area there
of and onto said stoker, said last mentioned tubes
terminating at the lower ends thereof in said
second mentioned lower header, and means for
supplying ?uid to said. lower headers.
JOSEPH S. BENNETT.
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