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Патент USA US2409444

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Oct. 15, 1946.
w. J. MQNTGOMERY '
2,409,442
METHOD AND APPARATUS FOR CLEANING FURNACE CHECKERS AND FLUES
Filed Aug‘ 20, 1945 ,
.NXmMHTl
8 Sheets-Sheet 1
Attorney:
1946.
w. J. MONTGOMERY- '
2,409,442
METHOD AND APPARATUS FOR CLEANiNG FURNACE CHECKERS AND Ii‘LUES
Filed m. 20, 1945
s Sheets-Sheet 2
_ _
Inventor
LLIAMJMoIvTGoMERK
“Mama”;
Oct- 1;5, 1946.
v
,w. J. MONTGOMERY
2,409,442 ‘
METHOD AND Armnuus FOR CLEANING FURNACE CHECKERS AND FLUES
‘
‘Filed Aug. 20, 1945
I
8 Shuts-Sheet 3
Oct. 15, 1946;
r
w. J. MONTGOMERY
2,409,442
_
METHON AND APPARATUS FOR CLEANING FURNACE GHECKERS AND FLUES
Filed Aug. 20, 1945 ~
' 8 Sheets-Sheet 4
IR
Inventor
7
CZMONT' 6 o M Eli)’;
A.“
7
Oct.15I 1946.
W. J. MONTGOMERY
2,409,442 ‘
METHOD, AND APPARATUS FOR GLEANINGFURNACE CHECKERS AND FLUES
Filed Aug_ 20, 1945
8 Sheets-Sheat v5 ‘
.
ll' '
>
Inventar
MLLjAMcI/VoN'reoMER ,
‘w. J. MONTGOMERY
w" 15,
METHOD AND APPARATUS FOR CLEANING FURNACE CHECKERS ANDFLUES
Inventor
MER y,
Get.‘ 15,1946.
w. J. MONTGOMERY
2,409,442
METHOD AND APPARATUS FORv CLEANING FURNACE CHECKERS AND FLUES
Filed Aug. 20, 1945
'_
-
8 Sheets-Sheet 7
W?/////////%
i i-Ml
y W//////
| I ‘ll 1 I
Inventor
Mum/w CZMWTQoMER ,
Oct. '15, 1946.
‘ w. J,‘ MONTGOMERY I
2,4095442
METHOD AND APPARATUS FOR CLEANING FURNACE CHECKERS AND FLUES
Filed Aug.- 20, 1945
\\ :.
s Sheets-Sheet a'
v
bizventor
M21: Ila/w CZMNTGOMERK
2,409,442
Patented Oct. 15, 1946' 4
UNITED STATES PATENT OFFICE
2,409,442
METHOD AND APPARATUS FOR CLEANING
FURNACE CHECKERS AND FLUES
William J ._Montgomery, Warren, Ohio
‘ Application August 20, 1945, Serial No. 611,602
17 Claims.
(Cl. 263-19)
This invention relates to improvements in a
method and apparatus for cleaning furnace
checkers and ?ues, and has for its primary object
the removal of ?ue dust and debris from the
checkers and ?ues.
Another object is to carry the ?ue dust and
debris to the base of the furnace stack pit or
uptake and deposit it on the ?oor of the furnace
stack pit or uptake.
Another object is to remove the ?ue ‘dust and 10
debris from the floor of the furnace stack pit or
uptake either automatically or by hand without
interrupting the operation of the furnace.
The above and other objects may be attained
by employing this invention which embodies 15
among its features directing a ?uid blast against
and through the furnace checkers to remove ?ue
dust and debris, suspending the ?ue dust and
2
Figure 5 is an enlarged sectional view taken
substantially on the line 5-5 of Figure 1,
Figure 6 is a vertical sectional view taken sub
stantially on the line 6-—6 of Figure 5,
Figure 7 is a fragmentary enlarged horizontal
sectional view through the base of a stack and a
portion of the ?ues leading thereto showing a
modi?ed form of isolating door arrangement,
Figure 8 is a transverse sectional view taken
substantially on the line 8-8 of Figure 7,
Figure 9 is a sectional view taken substantially
on the line 9-—9 of Figure 7,
Figure 10 is an enlarged transverse sectional
View through one of the blast conduits and its
nozzle,
'
Figure 11 is a transverse sectional view taken
substantially on the line ll-—|l of Figure 5.
Figure 12 is an enlarged detail sectional view
debris so removed on a moving ?uid blast directed
taken substantially on the line |2—l 2 ofFigure 3,
toward the base of the stack pit or uptake of the 20
Figure 13 is a fragmentary longitudinal sec
furnace, depositing the ?ue dust and debris on the
tional view taken substantially on the line [3-13
?oor of the stack pit or uptake of furnace, isolat
of Figure 12, and
ing the ?ue dust and debris so deposited from the
Figure 14 is an enlarged detail fragmentary
rest of the stack pit or uptake so that it may be
sectional
through the base of a furnace stack
removed without interrupting the operation of 25 or ‘uptakeview
showing a modi?ed form of isolating
the furnace.
‘
door and debris-receiving pit.
Referring to the drawings in detail, a furnace
the checkers or at any elevation of the checkers
designated generally 20 of the regenerative type
having nozzles for directing a, blast of ?uid against
is‘ provided with the usual hearth 2| (Fig. 2) in
or through the checkers, conduits extending longi 30 which the combustion of the mixed gases leav
tudinally of the side walls of the furnace ?ues
ing a mixing chamber 22 takes place. Leading to
Other features embody conduits mounted atop
and having nozzles directed in such a manner as
to suspend the ?ue dust and debris loosened from
the checkers on a ?uid blast which moves toward ’
the mixing chamber are the usual air and gas
conduits 23 and 24, respectively, which in turn
communicate at their lower ends with the usual
the base of the stack pit or uptake of the furnace, 35 checker chambers ‘25 and 26 containing walls 21
and doors adapted to be moved into a position to
of checker brick. The check chambers 25 and
isolate the ?ue dust and debris which is deposited
26 communicate at their ends opposite the air
on the floor of the stack pit or uptake by the mov
and gas conduits 23 and 24 with ?ues 28 which
ing blast so that removal of the ?ue dust and de
lead to a stack 29. The furnace is provided with
bris from the ?oor of the stack pit or uptake 40 the usual reversing valves 30 (Fig. 1) and the ar
may progress without interrupting the operation _ rangement of the various passages for the air
of the furnace.
and gas supply is of conventional form, following
Other features include removing the ?ue dust
that ‘ordinarily employed in regenerative furnaces
and debris from the ?oor‘ of the stack pit or
of the type to which this invention relates.
uptake by vacuum, and water-cooling the isolat 45 vMounted atop the checker walls 21 in respec
ing doors, not only to protect them from the in
tive checker chambers 25 and 2-8 are blast pipes
tense heat at the base of the stack pit or uptake,
or conduits ‘31 provided at spaced intervals with
but also to reduce the temperature in the iso
downwardly ‘directed nozzles 32 which are so ar
lated area of the furnace stack pit or uptake
ranged that a blast of ?uid is directed against
to protect workmen who may enter the isolated 50 the side faces of the checker walls 25 and 26 to
area for the removal of the debris by hand. ‘
loosen ?ue ‘dust and debris and cause it to be
In the drawings:
blown downwardly into the lines 28. These blast
Figure 1 is a horizontal sectional view through
pipes 3| are protected from the intense heat gen
a regenerative furnace showing the checker
erated within the checker chambers, first, by a
chambers and flues leading to the stack,
55 layer of asbestos 33 of not too dense a form so as
Figure 2 is a longitudinal sectional view, taken
to allow for expansion and contraction of the
substantially on the line 2-—2 of Figure 1,
pipes 3| under the in?uence of temperature.
Figure 3 is a horizontal sectional view taken
Surrounding the exterior of the asbestos cover
substantially on the line 3-3 of Figure 2,
>
a
ing 33 of the pipes 3| is a loosely packed insulat
Figure 4 is a vertical sectional view taken sub 60 ing substance preferably of a ?nely divided na
stantially. on the line 4—4 of Figure 2, y
ture, such as Sil-o-cell 34, which in turn is held
2,409,442
3
in place by an outer ceramic cylindrical shell 35
formed of. a suitable material, such assilica brick,
and the ‘entire‘insulated piping unitis supported
atop the checker walls by a suitable ceramic
structure 36 which may take the form of rectan
gular slabs, as illustrated in Figures 4 and 12.
The pipes 3| lead outwardly through'the end
walls of the checker chambers 25 and Hand are
connected to a header 3'! which'in turn is con
nected through a valve 38 to a pressure supply
line 39 which may be connected to a source'of
pressure supply, such as an air pressurereservoir
or in other instances it‘may be found desirable to
connect the pipe 39 to‘a source of high pressure
steam. ‘As illustrated in‘Figure 3, the pressure
line 39 is connected througha two-way valve ‘43,
which leads throughlbranch pipes to the valve
38, sothat one or the other ‘set of vchecker cham
bers on‘opposite sides of the furnace may‘selec
tively be cleaned. As illustrated in'Figure 3,‘the
pressure‘supply line‘39 is provided with a lead
which extends into each c‘hecker'chamber on op
4
the ‘reception of the ?ue dust and debris which
may be exhausted from ‘the base of the stack
through the pipe-B5 and fan'??.
Extending diagonally ‘from the upper end of the
:back wall ‘51 of the base of the stack to the lower
end of the arch 68, which establishes connec
'tion=between the ?ue 28 and the stack 29, and
against opposite side Walls 56 of the base of the
stack,
are inclined channels 69. Welded or
otherwise secured to the inner faces of the webs
of the channels 69 are angles 10 which extend
upwardly beyond the ends of the channels, as
illustrated in Figure 5, and are supported at their
extreme upper ends on suitable pedestals ‘H.
These'channels EQ‘and angles 10 form guides'for
‘supporting a door frame 12 carrying a layer of
insulating 'brick 13 which 'forms the ‘door for
isolating the floor '55 and well or pit 59 of the
stack 29 from the stack when the flue ‘dust'and
debris'is to be ‘removed from the base thereof.
In instances where it is 'desired'to provide cooling
for the door T3 and'the isolated-portion of the
stack 29, the insulating brick is provided with
longitudinal
passages for the ‘reception of cooling
a return‘ bend‘d I.‘ so that the fluid passing through
the ‘pipes will‘be superheated before it enters 25 ?uid-receiving pipes 74 which are connected to
gether in such ‘fashion as‘to' permit the flow of
the header 3'! and ‘blastfpip'es "3i. A ‘suitable
cooling fluid therethrough. Carried adjacent‘ the
shut-off valve ‘42 is arranged to control‘the‘flow
door 13 bythe'channels 69 are suitable conduits
of ?uid through the supply pipes"39 and insome
posite sides of the‘furnace and is provided‘with
'15 which are‘ preferably embedded in a suitable
supporting ‘material ‘16, and these pipes 15 are
30
sure-reducingvalve 43, and suitable ‘strainers 44
likewise connected with the'source of cooling ?uid
according to the requirements‘ of ‘ the; particular
so that additional cooling may be provided for
instances I ?nd it desirable to introduce a‘ pres
‘installation.
-
‘Built‘longitudinally along each '?ue"28 ‘at‘the
junctionof ‘its“?ooriand‘ its vertical side walls of '
the isolated portion of the stack and the chan
nels 69 further protected‘ against the intense heat
‘suitable “heateresisting "material, ‘such "as silica 35 from the furnace. Carried at'the upper end of
the door frame 72 is an ear" to which a suitable
brick, is a guardor housing 45‘provide'd‘ with a
elevating cable 18 isv attached. This cable is car
‘vertical curb 46,‘ ‘which ‘ curbs ‘cooperate to ‘form
ried over a sheave ‘19 supported in any suitable
'a7longitu‘dinally extending well‘or‘trough ‘Ill in
‘each such‘flue. ‘Ea0h'housing15‘is‘formed with
a longitudinally extending chamber ‘48 contain
“ing‘ a suitable‘ insulating . material“ 49‘ which sur
rounds aiblast pipe or ‘conduit-‘5U. ‘This blastv pipe
‘or ‘conduit is provided at spaced intervals‘with
blast nozzles 5|‘ which are directed outwardly and '
at‘ any ‘desired angle,‘throug‘h the curb “46 and
‘issurroundedby a suitable thermal‘ insulation‘ 52.
‘The nozzles ‘50‘ are preferably placed at such an
langleas‘ to- cause‘ the‘?uid blast issuing therefrom
S to lbe‘directe‘d in'the 'general‘direction'of the stack
"2950- that a'lon‘gitudinal‘?ow of‘ the ?uid issuing
‘from the vjet't'il will be-toward the'stack. "These
‘pipes 53 are connected through the medium of
manner on a bracket 80 and the cable 18 is con
40 nected to any suitable type of winding drum (not
shown) by means ‘of which the door frame 12
and“ the .insulatingbrick carried thereby may be
lifted during the‘normal operation of the furnace.
In the modi?ed form of .stack'floor-isolating
mechanism‘ illustrated‘ in Figures ‘Ho 9, inclusive,
I provide adjacent'the stock'base a pit 8| and
extending horizontally across the arch 88 at its
lower end is a channel '82. ‘This channel extends
into the pit 8|, as. illustrated in Figure "I, and has
mounted therein at spaced intervals angles 83 for
a purpose to be more fully hereinafter described.
Av similar‘channel 84. extends horizontally‘across
the back wall‘ ‘51 of thebase of the stack and into
the pit 8| substantiallyon a level with the'upper
end of the arch 68. Like the channel ‘82, the
valves 54 arranged at suitable points in'thensys
channel 84 is provided with an angle‘85 for a
‘tern.
.
purpose to be more fully'hereinafter described.
Formed-at the junction of the“ floor‘ 55 and‘ th
Extending'between the channels 82 and 84 are
side Walls and‘back wallY56 and‘5l, respectively,
isolating doors 86 carrying at opposite ends rollers
of the‘ base of the stack‘29 is a'curb'58 forming a
well 59'into‘which the ?ue dust and'debris is 60 81 which ride on the'fianges of the channels and
the angles to‘facilitate easy movement of the
deposited. Blast pipes 60 are'embedde‘d in‘ the
doors into open or ‘closed position. Like the door
curb 58 and ‘are provided with'nozzles El'leading
‘risers i53 to'the pressure supply'line“39,‘ and so ar
ranged‘as to‘ be separately controllable‘ through
13,'the doors 86'may alsowbe provided with suit
outwardly throu‘gh’the‘ sidewall of the curb‘ to
ward‘ the interior ‘of ‘the well ‘59. These blast 65 able cooling fluid. conduits 88 for the circulation
of cooling ?uid therethrough.
pipes 50 are connected in any suitablev manner to
Alternatively to the ‘form of doors illustrated
the‘ pipe‘339 leading from the‘source of'?uid pres
in. FiguresS to 9, ‘inclusive, there are instances
sure‘and suitable valves (not shown) ‘are. inter
when I ?nd it desirable to employ at the base
posed for the'p‘urpose of “regulatingthe ?ow ‘of
of the stack 29' a structure such as that illus
?uidinto the pipes 60. Formed in‘the'?oor of
the ‘stack approximately ‘mid-way "between the 70 trated in Figure 14. In such a case I provide at
the base of the stacka pit 89 on the upper ends
‘sides and ends of'the well or pit 59 is an opening
of the'side walls of which I support a door 90 on
B3-through which a dischargepipe 64 extends.
suitable rollers-9| which enable the door-'90 to
This discharge pipe is connected'througl'i a'riser
be withdrawn from its position beneath the stack
"65 with an exhaust‘ fanj56,'which in turn is‘ con
nected to a pipe‘ 6'!‘ with a suitable receptacle ‘for 75 so that flue‘dust- and ‘debris-twill be deposited in
5
6
the-pit 89. In~order to facilitate the easy're
' system at suitable points to effect the desired ?ow
moval of such material ‘from the pit,'I ‘provide ‘a
of ?uids therethrough. ‘
'
,
.
carriage 92 in the form-of a receptacle which
‘While in the foregoing there has been shown
may be readily moved from its position beneath
and described the preferred embodiment of this
the lower end of the stack by movement on rollers 5 invention, it is to be understood that minor
83 in a horizontal direction. It will be under
changes in the details of construction, combina
stood, of course, that a suitable pit is arranged
tion and arrangement of parts may be resorted
adjacent the pit 89 for; the reception of the car
to .without departing from the spirit and scope
riage-92.
V
‘
‘
‘
‘
‘
i
‘
‘’In operation, it will be understood that ‘when
‘a certain checker chamber or ?ue is 'tobe cleaned,
the proper valves are opened to direct the ?uid
blast from the pipes 39 through the superheaters
4! ‘to the header 3'! and thence into the pipes
10
of the invention as claimed.
I claim:
.
'1. The herein described method of cleaning
furnace checkers and ?ues which includes direct- .
ing a ?uid blast against the checkers to dislodge
fine dust and debris therefrom, collecting the
3| resting atop‘ the checkers. The ?uid issuing "15 ?ue dust and debris so dislodged on the ?oor of
throughthe nozzles 32‘will‘be' directed against
the furnace stock, isolating the portion of the
the sides of‘ the checker: and down through
?oor 0f the stack upon which the ?ue dust and
checker openings so as‘to loosen any ?ue dust
debris is collected, and removing the ?ue dust
and debris and direct it downwardly into the ?ue
and debris from the isolated area.
28 with which the checkerlchamber is connected. 20
2. The herein described method ‘of cleaning
Simultaneously with the dislodgment of the ?ue
furnace checkers and ?ues which includes direct
dust and debris from the ‘checkers under the in
ing a?uid ‘blast against the checkers to dislodge
?uence of the ?uid blast issuing from the nozzles
?ue dust and debris therefrom, conveying the
.32 pressure is admitted through the risers 53 in
?ue dust and debris so dislodged to the base of the
the proper ?ue 28 so as to create a‘ ?uid blast 25 furnace stack, collecting the ?ue dust and debris
in the wellor wells 41 of the ?ue passage which
on the ?oor of the furnace stack, isolating the
is being cleaned. Due to the angular disposi
portion of the ?oor of the stack upon which the
tion of the nozzles ‘5| leading from the blast pipe
?ue dust and debris is collected, and removing
50 at the bottom of the ?ue 28 a ?uid blast will
the ?ue dust and debris from the isolated area.
:be created which moves the ?ue dust and ‘debris 30 '3. The herein described method of cleaning
toward the stack 29.
Rising at the stack 28 and
at the end of the creation of the ?uid blast, upon
which the ?ue dust and debris have been sus
tained, the ?ue‘dust and debris will deposit on
the ?oor‘ of the stack until a ‘sufficient quantity
has been, accumulated ‘to warrant its removal.
The isolating door 12 or 86, as the case may be,
is then‘ closed so as to isolatethe area upon which
, furnace checkers and ?ues’ which includes direct
ing a ?uid blast‘ against the checkers to dislodge
?ue dust and debris therefrom, creating a ?uid
blast in the furnace ?ues which moves toward
the stack‘of the furnace, conveying the ?ue dust
and debris‘ by said ?uid blast to the base of the
stack, collecting the ?ue dust and debris‘ on the
?oor of the stack, isolating that portion of the
the ?ue dust and debris havelbeen ‘deposited from
?oor of the ‘stack upon which the ?ue dust and
the rest of the stack, after‘which the removal 40 debris is collected, and'removing the ?ue dust
and debris from the isolated area.
of the ?uedust and debris from the ?oor 55 of
the stack may ‘proceed,'either by hand or. auto
‘4. The herein described method of cleaning
matically, by operating the exhaust fan 66 and
furnace checkers and ?ues which includes direct
discharging the ?ue dust anddebris through the ‘ ing a ?uid blast against the checkers to dislodge
,pipes 64 ‘and 61 to anysuitable receptacle. It F ?ue dust and debris therefrom, collecting the ?ue
dust and debris so dislodged on the ?oor‘ of the
is to be noted that the isolation ,of the ?oor‘of
furnace stack, isolating the portion of the floor
the stack does not interrupt the ?ow of heated
of the stack upon which the ?ue dust and debris
gases through the stack, though some constric
‘is collected, and extracting the ?ue dust and
tion of the passage result. Such constriction is
not serious, however, and enables the furnace to 50 debris from the isolated area under the influence
.be operated continuously without interrupting
of‘ vacuum.
,
'
-
5. The herein described method of cleaning
furnace checkers and ?ues which includes direct
The ?ue. cleaning process may be carried on
ing ‘a ?uid blast against the checkers to dislodge
continuously with the operation of the furnace
by . employing the pressure-reducing valve 43, 55 ?ue dust and debris‘therefrom, conveying the ?ue
dust and debris so dislodged to the base of the
which, while causing the ?uid blast to serve some
furnace stack, collecting the ?ue dust‘ and debris
what as a booster to the‘ stack draft, at the same
on’the ?oor of the furnace stack, isolating the
time‘ so regulates the pressure of the blast as to
portion of the ?oor of the stack upon which the
avoid interference with the furnace operation.
Under‘ such conditions of continuous operation, 60 ?ue dust and debris is collected, and extracting
the ?ue dust and debris from the isolated area
itis only. ‘necessary periodically to manipulate
production for cleaning purposes.
‘
the doors 12 or 86 so as to isolate the ?oor of the
stack from the rest of the stack during the time
that the stack cleaning is in progress. ‘The op
eration of the ‘structure ‘illustrated in Figure 14
--is essentially the same as that previously de
scribed, except that‘ the door 90 operates in a
horizontal rather than an inclined plane, and the
carriage 92 forms a {receptacle for the reception
of the ?ue dust and‘ debris, which receptacle may 70
periodically be ‘withdrawn from its ‘position
under the in?uence of vacuum.
6. The herein described method of cleaning
furnace checkers and ?ues which includes direct
ing‘ a ?uid blast against the checkers to dislodge
?ue dust and debris therefrom, creating a ?uid
blast in the furnace ?ues which moves toward
the stack of- the furnace, conveying the ?ue dust
and debris by said ?uid blast to the base of the
stack,“ collecting the ?ue dust and debris on the
?oor of the stack, isolating that portion of the
"floor of‘the stack upon which the flue dust and
beneath the stack when‘the door 98 is closed so
debris is collected, and extractingthe ?ue dust
that ‘it may 'be emptied ‘‘-at ‘leisure. Doors or
and debris from the isolated area under the in
dampers (not shown) may be introduced in the 75 ?uence
of vacuum.
“
772,409,442
‘.?ftThel herein described xmetliod ..:of :zcleaning
furnace checkers and ?uestwhichiincludesrrperh
;odically tisolating , rceitainrofrthe schecker .zcham
lbBI'Si an‘da?ues , :of'ta Ifurnacei’from :other :che'cker
:12.;.In asystem" for cleaning furnace checkers
, an'di ?uesi. the combination @with‘ a furnace which
:includes pchecker chambers, checkers ,- in said
:checker chambers, a- stackaand ?ues -, establishing
zcha'mbersgand :?ues :of the furnace, directing: a in zcommunicationrbetween the checker chambers
an'dgthe stack, of, means selectively to isolate ‘cer
- ?uid-blast against‘ thejsolatect checkers :and: along
Itain ; checker chambers and 1?ues :from other‘
ilhe isolated?uesitowardttheistaclc ofithe: furnace,
..chambers andx?ues of ‘the furnace, means-for
, collecting the ‘?ue. ldustaandxdebris: dislodged: and
creating an air blast against the checkers‘ in‘ the
carried by the ?uid blastwonithe?oono?thecstack,
isolated
checkerv chambers to~.dislodge ?uedust
1-0
without arresting the ?ow of heated gasesrfrom,
and:d'ebris: therefrom,- means for creating ~ an 1 air
'. the unisolated' ?ues andv checkers. of? the :furnace,
:current through‘the isolated flues upon which
isolating that 3 portion :‘of lthef?oorcof :therstack
‘the
?ue'hdust and :debris is conveyed toward. the
eupon'which 'ther?ue; dust‘ and :debris’ is;;collected,
base of sthezstack :andby which it is collected
{and removing the?ue~:dust.:and debris? fromz .the
and deposited on the ?oorof the stack, and means
‘isolated ‘area of thecstack.
to isolate only that part ‘of the stack containing '
18.“ ‘The ‘herein described : method -;~of :cleariing
vthe
?ue dust and debris from the'remainderof
‘ furnace checkers andl ?uesnwhich 1 includes aperi
.the stack-whereby the?uedust and debrismay
odically isolating certaini'ofthezchecker chambers
be ' removed without interfering with the: ?ow‘ of
and ?ues of afurnacexfromcother checkericha-m
heated gases into the-stack.
20
:bersand?ues of ,the furnace, gdirectingia ?uid
.l3..In a system for cleaning furnace checkers
'blastxagainst, the isolatedjcheckers vandalong-the
and. ?ues, thecombination with a furnacewhich
isolated =?ues towardsithe :stack :of the-furnace,
.includess ; checker chambers, checkers in ,said
:conveying v:by the .Y ?uid'xblasti' the 1 ?ue ,dust {and
checker chambers, a stack and'flues establishing
.debrisdislodged :thereby along .;the‘ ?ues .toward
communication between the checker chambers
, the base of ~ the; stack. of athe ‘furnace, collecting ,
and the stack,_of meansto create a blast, of ?uid
vthe ?ue,dust anddebrisontthe' floorgrof the;stack,
against the checkers and along the ?uesto ‘dis
without arresting the -1 ?ow ofheated gases 1 from
lodge
?ue dust and debris from the. checkersand
thepunisolated fines. and checkers ofzthe-furnace,
to, convey it along the ?ues to the floor of the
isolating .that; portion of : the ?ooraof ,the stack
,upon- which the .?ue dustz'and debrisis collected ,30 stack, means to isolatethat portion of the stack
"and extracting the?ue dust :andtdebris; fronr-the
isolatediareatunder the in?uence of-vacuum.
.- 9. The .herein - described :method "of :cleaning
t'furnace- checkers ,- and ?ues which- includes‘ direct
ing. a ?uid; blastz-ragainstzthe, checkersxtoa-dislodge
.?ue dust-zand ‘debris therefrom, collectingpthe
:?ue dust- and fclebris; so :dislodgedrom the -.?oor ;.of
the ' furnace. ‘stack, isolating the portion 10f * the
.?oor of. the ;stacln.upon which:the r?ue; dust:and
,‘debris is collected, -;decreasing -: the itcmperature
within the isolated portion ofithecstach'gand re
;moving. the ?ue; dust and-debris Homing-isolated
area.
' 10. ‘The herein idescribed rmethodz of: cleaning
furnace-checkers andl?uesiwhicn includes; peri
:.o;dically isolating:certairroithe-:checker chambers
and ?uesv of abfurnacelfrom:o.ther checkerpcham
rbers ‘and ,?ues of i the ‘furnace, ,adirecting agf?uid
blast :againstithe,isolatedicheckers: andzzalong the
isolated‘: ?uesi-toward ttheestack :of@ the .;furnace,
collecting the ?ue dust and debris dislodgedvand
- carriedby. ther?uid blast .on the ?oorof thegstack,
“without: arresting 1 the diow 10f: heatedigases, from
the. iunisolated ‘ ?ues and< checkers of i the wfurnace
-~isolating~that ‘portion ;of 2131.18 §~ ?oor z of : the‘ stack
upon‘. which, the ,?ue¢dust;=and:~debris .istcollected,
vdecreasing : the temperature -:within : the isolated
portion of‘ the stack,- -'and removing thezi?ue 'rdust
and debris from the isolated ‘area.
, 11. In eaisystemifor-cleaning' fiurnacei checkers
land ?uesuthe combi-nationnw-ithr a furnace-Which
includes checker chambers, ‘checker-s ~,"in rsaid
checker chambers, a stack and ?uesestablishing
communication between the checker chambers
“and the .stack,-of m eansmto, create vanblast "of ?uid
tagainstthehcheckersand alongthe fines to dis
,lodge ?uedust. and‘ debris from-the checkersand
- to ,acenvey it along, the .?ues to 1 the ?oors of the
.-stack,,-and meanstodsolate the, portion of the
inwhichthe ?ue dust and debris collects,,and
means, to decrease the temperature in the isolated
portion of the stack.
14. In a system‘for cleaning furnace checkers
and ?ues, the combination with a'furnace which
includes checker chambers, checkers in said
checker chambers, a stackan'd ?ues establishing
communication‘ between ‘the checker chambers
and thestack, of meansselectively to isolate cer
tain checker chambers and'?ues of the furnace,
means’for creating an air blast against the check
ers in the isolated checker chambers to dislodge
i‘?ueidust'and debris therefrom, means for cre
‘ating‘antair 'current through‘ the isolated‘?ues
.' ‘:upon whichithei'?ue'dust and- debris is'conveyed
‘toward the‘ base'of‘ the stack and by which it is
collected‘and‘deposited' on the ‘floor of the stack,
‘means to isolate‘ only that part of’ the stack‘ con
‘ taining’ the "?ue - 'dust and; debris from ‘ the "re
"mainder ‘of' the stack, and means’ to cool the‘ iso
iated- ‘portion of the stack.
"15;'The combination‘ with means for'dislodging
and conveying ?ue dust-anddebris‘from-furnace
checkers and depositing said‘ ?ue 'dust ' and 'debris
on'the ?oor ~of-the ‘stack ‘of the furnace, 'of' a
‘door adapted to-partially-close the stack to isolate
the-?oor from’the'remainder of the stack vWhere
Lbyv removal of -' the“ ?ue dust and debris’ can pro
gress-without interfering with the'operationl'of
‘the furnace.
116.‘In combination, with, a furnace stack, a door
;-adapted to be moved into a position ,to'isolate
1. the l ?oorhof thexstack from the :balance of .the
stack,:.and: meanstto support the door in 1 open' or
. -c10sed;position.
1'7..='A :doorffor: isolatingzone'part not a furnace
astacki fromzanother part .ofxsaid stack which in
cludesgazpain of :spaced :guides- so .positioned; near
,theibasetofithe stack that whemthe dooris closed
,stack, in which» the fine .dust, and, debris, collects 70 , it ' 1ies~at such: .anangle t0-:the;;major;:axis> of,:the
stacktasxto allow‘ theireepassage :of - ?ue ,ggases
whereby removal c», the ?ue, dustand, debrisfrom
through the stack, andwmeans to' open ;,or¢;c1ose
tthe isolated» area of_.the,stack, maygprogress with
. out interference from “the/heated, gases; passing
through the, stack.
,
u
.saidtdoor.
-
'
»
1WILLIAM-J.~MONTGOMERY.' ,
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