US1461450A - Stoker furnace - Google Patents

Description

July 10, I923.

H- A. POPPENHUSEN STOKER FURNACE Filed Dec. 14 1921 3 Shuts-Sheet l i 1 I Jamar 1%W/ffi Q M 2/ima July 10, 1923.

H. A. POPPENHUSEN STDKER FURNACE Filed Dec. 14. 1921 5 Sheets-Sheet 2 July 10, 1923.

H. A. POPPENHUYSEN Toallwhamitm ityofseparate supply conduits for t p 1,461,450 PATENT OFFICE.

:1: moooxrm, 03m! CHICAGO,

mom ironmon.

A umm fled lumber 14,180.. seen no. men.

comm. Be it known'the t if'mamn UnitedS mg at l'dnmmoniili the county of State of Indiana, have invented new and useful Impro in Stoker Furnaces, of

which the, followingis a specification.

invention relates to furnaces, and more pmicnla'rlyto furnaces equipped with mechanical cookers, such as chain grates, and provided with vertical air ducts-at the sides of the grate for supplying the active grate do- .surfoce from below with a forced dra livered to-the grate between the top and hot tom leads thereof.

One object of my invention is to provide for .the vertical air ducts at the sides of the grate, a main air supp] conduit, common to all of said vertical note, for avoiding the expense of buildin'gend use of a lure 6 56% oral vertical ducts as heretofore, and further for delivering a substantially steady and continuous flow of air to the grate by being able: to maintain for all of the vertical ducts, regardless of their number, a substantially constant pressure in the main supply conduit.

Another obj'ectof my invention is to make the vertical ducts the all width of the com- .partments. between the rote leads-and into which these ducts open For giving a full and adequate supply of draft to the entire grate surface covering. the compartments, and. thus gain an, eflicient and economical cornbustion of the fuel being carried on the further object of my invention is to urrange the main supply conduit between the vertical ducts at the opposite sides of the grate and have all-of said ducts open mto said conduit so that the latter'mny be located in the furnace setting between the side walls thereof and beneath the grnto, thus retaining all of the draft supplying structure within the confines of the furnace and not rejecting beyond the sides thereof to into ere with or hinder the building of furnaces side by side with their side walls in contact.

A still further object of my invention is to locate the main suppl conduit directly beneath the lower lead 0 the grate and to partition said conduit from said leald by plates directly beneath said lead, thus enview taken through one side of the abling the heightof the from to for mono, mnuneinssxonon no man mommamama, A o. sromrron onnmmols.

to n of said conduit 'to be reduced to the minimum.

Another object is to deliver the the vertical conduits directly into the space between the grate leads and to seal the compartments into which said space is divided transversely by members beefing against the respective ate leads.

The invention cons" s further in thematters'hereinafter described and more portionlarly set forth in the following claims.

In the occompanyingdrawin r Fig. 1 is a longitudinal vertidel section view ofa chain grate stoke! furnace embodping the features of my invention;

Ij1g. ills a. transverse vertical sectional" view taken on line 2+2 of Fig. 1;

Fig. 3 is an enlurged-verticaleeetionnl furnace, the damper being shown open; 7 Fl gund 5 are perspective views of" detai s of construction to be hereinafter described; and i Fig. 6 is a horizontal sectional view taken on line 6-6 ofFig. '1.

. of the type embodying a mechanical stolrer,

such as a chain grate 1 located in thefcombustion chamber of the furnace and, hnvi upper and lower leads 2 and 3. Said grate 1 extends into said combustion chamber through the front wall of the furnace end has its rear or tailend terminating. rt. of the bridge wall 4 to provide a ve'rt cal passage throughwhich ash is discharged the tail. end of the grate into a hopper (not shown) below the'grate as in furnaces of this general t pe. At the front of the furname is a fuel hopper 5 through which fresh from or green fuel is fed into the combustion chamber and onto the upper lead 2, which carries the fuel in a layer through the combustion chamber for consumption, as obvious. The grate 1 extends horizontally bet-ween the side walls 6, 6 of the furnace setting, as shown in Fig. 2, and these walls each. in elude a, plurality of upright metal stools 7, 7 at the o posite sides of the grate. The stools 7, 7 in each wall, are laterally spaced apart the same distance and, irrthe perticular furnace illustrated, there are four of such stools 7 in each side wall, with the stools in one wall aligned with those in the opposite wall, is shown in Fi 6. Said cured to the stools 7, 7 in line wi h th upr ad ofthe frames 9, 9 are channel bars I. Said bars 11 extend along the side ed of the upper grate lead 2 an have low I y extendin flanges on which the sides of the grate, lelih ustably mounted on them, ledge plates 12. lh'e door frames .9 are spaced outward from the side edges of the grate, and extending between them and the bars 11 are lates 18, 13. These also extend between t e stools 7, 7, between which they are located, and close the spaces between the door frames 9 and bars 11, as shown in Figs. 2 and 3. The furnace floor 8 extends beneath the lower lead 8 and together with the structure to be hereinafter described forms an air sufppllly e "conduit 14 extending the full width 0 stoker 1. In the furnace shown the door frames '9 extend below the level oi the lower lead 8 and metal plates 15 close the spaces between the-lower margins of said frames Send the floor 8. W

By the construction described, a plurality of vertical ducts 16, 16, 16 are provided on opposite sides of the grate 1 and all of these ducts communicate at their lower ends with the conduit 14, which is common to they; all and arranged between them, as shown in Fig. 6? The vertical ducts' 16, 16 are closed attheir upper-ends by the plates 13, and jopen into the space between the grate leads 2 and 8 at appeal hides of the furnace.

Thisaspuce *is divided; trunsve fi'flly mtoa plurality Ipf compartments 17, 17, equal in numberto' the vertical ducts or passages 16, 16 at one side of the grate and communicatingwith them. To accomplish this I make use ofisupporting skids or rails 18 for the uppergratelead 2'. These skids 18 are loternlly spared apart. and extend lengthwise .of tliegh'nte 1 beneath the upper lead 2, as shown. grate-between the upper and lower leads 2, 8, are a 'pluru'lity of vertically arranged channel members 19. 19. These are 'alinged with the several stools 7, 7 and are supported thereby, as shown-in dotted lines in Fig. 3. Sold members 19, 19 fit. against the un der sides of the skids 18. and hctwccn them and the under side of tho lop lead 2 are a plurality of memlwrs 20 shaped as Shown in Fig. 1. Fold members 20 r-xtonrl hetwovn and are supported by the skills 18 to close.

7 with the under side of the top ea 2 rest. These bars 11 have ad- 'tb Extending transversely across the.

under sideof the top lead 2 .and thus provide air seals-between the severaleom ments 17 17 along the upper lead 2. over, sai me 20 have wi in 2 so as not to hinder the front to the rear of the furnace.

As shown in Fig. 1, the members 19 terminute short of the bottom lead 8, and for closing the spaces between such parts, 1 pro vide a plurality of sectional members 21, 21. on the upper surface of the bottom lead 8 and have wiping contact therewith so as not' to interfere with the movement of that lead during the operation of e grate. Said members 21 are suspended from the members 19 -by having their hooked upper ends engage over angle plates 22 carried by the members 19, as shown. The members 21 are slid endwise on the angle members 22 in the installation or the furnace and are held in substantiall tight contact with each other by end bra eta 2B, 23- adjustably secured by bolts and elongated slots to the sides of the 2 and 8.

By having the members 21 hooked over the supporting bars 22, saidmembers 21 ma be raised upward by the droppage carri under them by the bottom lead 3, and to prevent the members 21 be moved by the droppage oil" of said bars 22 provide guard .plates 24 extending over the hooked ends of the members 20, as shown in Figs. 1 and 3. These plates 24 are suitably secured to the cross-beams 19. The members 20 and 21 hearing against the top and bottom leads of the grate 1 provide air seals between. the various comdpartments 17 formed by said members an the beams 19 and prevent one compartment leaking into the other when placed under draft from the main supply conduit 14;

Arranged beneath the lower lead 8 are skids or rails 25. These extend substantially. the full length of the grate and support said bottom lead 3. Between said skids 25 extend metal plates 26.26. These form a'roof or top wall for the conduit 14 and divide the some from the lower lead 3. Said plates 26 Where they engage the skids 25 have their side edges bent to rest on and conform to the base flanges of said skids, as

shown, to provide an air seal between the plates and skids. The outermost lobes 26 at each side of the grate 1 have t eir side edges flanged upward, as at 27. and these' flanges are secured to members 28 extending between the several stools 7, as clearly shown in l igs. 2 and 3. These members 28 are mnrlc of cast metal and tho lower lead 3 rests on them. Between the flanges 27 and tho momliors 28 an u'onr bars 29 made of steel. This lulws ihc friction of the lower contact"- movement thereof from the stools -7, as shown in l6 verse members 19 an are supported lead and saves-tha'membors 28 from wearwiththe stools 7 iormin orthe intermediate duct 1 rear end of this shaftisj as shown in Flg. 1.. o tubular and is not Said shaft 38 etback to and in line orming the rear sides of glintfi s 43, 43, with the mp'er plates 34, as shown in f each of these shifts elarm 45, and pivoted rods 46, 46, one for e rods 46 are pivot ght operating levers ctively, .8 shown in- Ievers have suitable latch in connection with as shown in Fi r 6 any of theirse mifdown beyond the bars 29 lower stantially vertical alifmnent with the transth ends by webs 32 onfthe stools 7 The grate 1 in indoor con to lead 2.. v i 35 e con'duit14 beneath the stoker is com- For contra mg the admittance of as shown in igs.'.2.and 3; are hinged to stools 7 below the parts 28 and are adapted tol-be swung from a position closing the iggf 16 at spaces between the members 28 and the both 'tom'walls '15 of the vertical air ducts'16.

ch vertical duct 16h'as one of these gg ggj f 3 the ducts 16 to be cutout or supplied with fifi i fi 47 is a m a e lates 34.

F or actuating the dampers 34,1 employ g g g g g 14 to flow three shafts 36, 37, and 88. These extend c'ompartment 7 and intothe conduit 14 from a point outsidethe f l layer under f c as out of the furnace and througna vertical dampers 84, thereby permitting any one of air to the extent? desired.

the conduit 14, as shown in Fig. 1.

coated on themembers 28 are a'nglabdrs 12?. 6. Th 80.- These-form ledge platmfor the lower n ed in a I lead a and extend between the stools 1 and The next shaft as is ab are adjustnbly secured by a bolt and slot as long connection to the members 28 so that they tends into the conduit 14 "mag be adl'uated against the side edges of with the stool 7' f sai end 3 to rovide an air seal bethe forward verti tween the lower lea and :the members 28;. nal

The skids am supported fminbelow by "is' provided with two In a plurality of tran verse members ,81, ae.-which are connec d by clearly shown in Fig.1. These are 111 subassociated do as the one 87.

d in a bracket 42. Eae

at At the outer end 0 v shown in 86, 3'1, and 38 is a radi Fig. 3. The plstes'26 extend between these t the are connectin members 81 and the skids 25. Toolbar: the h f id arms, spaces'betweentheplatesQfi and the under ally connected to upri 2. surface of the lower lead 3 in line with the ,4! 48, and 49, respe members 19, I provide a plurality of memxFig. Th

bars 83. These are secured "in place-in any members o erafti suitable manner and bear against the under at h d e t Side of the bottom lead- 3 in somewhat the f H ldi th zo'same mannerasfio the memblier: 21. positions f dj st t.

p lifld'lmkfi a The conduit 14 may be on parts th .& ga g between from any suitable source a customs in chain grate construction, and, f nd manner, as, an ai in prev s l h' 9' shown two blowers 51 1 one p 17 to mother tric motors 52,52 for hi th ro h the'lower lead 8, the chambers parts are arranged at the forum between th 'd d P11111593 conduit 14 and forward of t fill with ash from theudmppage through the The '.b1 w g thaoughfitlllris wall e nace struc mon to all-of thevertical ducts lfieand also, 1 n to all of the coin artments 17 formed be-- fifi g flff to but in thejdrawin' into the furna'c front endof t u h the toniimsmion chamber of the grate. ed for aidin iecl tothe conduit under side of the anyone or all of the vertie sides of the desired to 511 p y a draft to ed, that is, the fuel tween the to and ttom le'ads of the ate. happen 5 at 1% i isfl-carriiadthrd 11 1t0 theseseyeral compartments 17; I proin a layer on indaa pluralit of damper plates 34. These, To Suppl-y draft wt 9 fuel b mem'bers 35-sxtend1iqfibetween the several gg i fi gg a 11 of the fuel jacent the place of..

front compartment 1 the open the fore-- his allows air 'into the first aces the inc 1 Should it be desire plate 39 extending across the front of the g' iddl sect) conduit 14 and closin it at the front of the i th f l b d we iurhacm. These 'sha ts are telescoped and 17, th h d the one 36 extends, the full length of the p n the damper 3 conduit 14; that'is, it extends from the front a d air i pplied ofthe' furnace back to the rear end of said of th in conduit. The rear end of said shaft 36 is (in the other hand, should it journaled in a bracket 40 at the rear end of supply the last of the fuelbed the hand lever 49 is o erated The next shaft 37 extends back to and in rearmost dampers 3i sides ied with air p her by elecurpose. nt end of the he firgnt wallpen into tlije'Icon'duit 14.- supplying air thereto.

hown. and do Fresh or green through the grate and oming d to supply air to the n of the fuel bed, that r the middle compartlever 48 is operated to 4 for that compartment ereto from both mace through the midbe desired to with a draft, to open the hould it be desired 130 the rear sides as shown '11:

to cut out any of these compartments 17and allow any of the others to be opened to draft, the damper plates r the articular compartments to be dose are "c osed and those to be opened are opened through the levers for that or those compartments, as isap arent. i

us during the operation ofthe furnace, e1ther the entire rate surface may belilnced under forced dra t, or any section orseol'rions thereof, as may be desired. Maniiestlj the fuel bed may be placed under that: most suitable to gain proper and economical consumption of fuel and these draft-conditions may be made suitable to the nattiiie oi the fuel being handled and also on of fuel feed. It is to be observed that the conduit 1d common to all of the ducts 16, 16 at'both sides of the grate 1, and further that the communication of each duct 16 with the conduit 14 is of the full width of the duct 16 and also that the latter is the full width of the compartment 17 which it supplies,

-This allows supplying air to the grate at an even and substantially continuous flow without high velocity and thus avoids blowing holes in the fuel bed b the drattbeing forcedtoo rapidly throng it. Furthermore,

the entire grate surface covering such comartment '17 isplaced under draft throu h |ts,en;tire extent or area, thus dining a equate and complete supply of air to the fuel bed sections over such areas. Moreover, by having the-conduit 14 common to all of the vertical ducts 16, the pressure in the conduit 14 may be maintained constant and at that degree most suitable to secure an even and gentle flow of draft regardless of the number of ducts 16. Then a uin, having the conduit 14 beneath the stoccr l and its communication with the upper chain load 2 around the sides of the stohcr, avoids leading the draft into the stoker through the side walls oi the furnace from points exterior, thus reducing the width of the-furnace to the minimum: and cnablin the same to be built in buttery form as t u-re are no arts of the draft structure projecting bcyon the sides of u stoker to interfere with or prevent that. Agiiin, by having a single supply con duit I4 and that common to all of the ducts 18, ovoidstbc expense of building and use of separate supply conduits for the various vertical ducts 16, as heretofore. Other and further objects of my invention will be a parcut to those skilled in the art to whic my invention relates.

While I-hurc shown and described herein in detail a structure embodying the features of my invention, it is of course to be understood that the details of construction and arrangement of parts may be variously chaugcd and modified without departing from' the spirit and scope of my invention.

. g alieing ppqsi the ,oorrespon 'lead under a draft.

4. In a'furnaee, the combination of an .endless chain grate having up or and lower I claim as my invention:

1, In agfurnace, the combination of a to a plurality of air-ducts on op osite si es 0 said, opeiningbenezit fthe fuell suprtmfi ionosai e orsu vereto, the ducts a t one side b ffi I 1 8.111% ducts Ql1 fi ll--0ll1lf$ldli0f said grate, a sing e'-con'- that grate and between the some it des-thereof and conduit being common to'a'll oi. said acts for supplying 'a'ir thereto, a damper for each duct, 1 pluralliby of shafts between said ducts, one for each set of op ice ducts, and means cannectmgeach ft with the dampers of its :gwoiated ducts so'that-the dampers of one oi ducts may be actuated of odern rsof algother set.

In a mace, e combination of an endless chliglgrate having upper and lower leads a pl it of beams extending transve I v across t a space between said leads for dividing said 8 see into a plurality of compartments, mem ,zassociuted with said beams and extending onopposite sides thereof, said members being in contact with said upper and lower leads, respectively, for provi 'ng air seals between said com artmenlzs alo said beams, a single conduit beneath the ower lead and common to all of said compartments, and means for sup lying air to said com artments from sin around the si es of said lower lead.

3. In a furnace, the combination of an endless chain grate having upper and lower leads, skids extending longit'u inally of said grate beneath the upper lead for supporting the same, beams extendin transversely across the space between sai lendsv for dividing said space into a plurality of compartments, said. beams bein against the under sides of said skids, mem ers associated with said beams and bearing a -'nst said upper and lower leads, respective y, for prong air sealsbetween said compartments aloniesaid leads, the uppermost oi. said mem said beams, and means for supplying air to said compartments for placing the upper leads, skids exten grate beneath said upper lead for supportmg the same, beams extendin transversely across the space between sai leads for dividing said ace into a plurality of coinpartments, said beams engaging the under sides of said skids, membersnssociuted with said beams and engaging against the upper and lower leads, respectively, for providing air seals between said compartments along said bcanls, thelowermost of said members being mounted on said beams in a manner conduit rs extending between said skids forclosingthe spaces between the'same along ding longitu mally of said i ependently met-most rmitting said members to be raised by. lyfipage carried under them or said lower Q a partments around said for placing the u per-mitt raising of said members b dro page cai rl ed under by said lowzr' lea d, an means for supalgmg air to saidtcom- Sldfifl of said lower per'lead under dra In a furnace, e'eornbination of an endless chain grete having up r and lower leads, skids extending lon'gitu innlly' of saidgrate beneathv said upper lead for support-- mg the same,:beams ,extepdi transversely across the space. between sai leads "for "de riding said s see into a plurality of compartments, said, beams engaging th'e under sides of said skids, members assoeiated with said beams and en against the it per and lower leads, vey, for provi mg air seals between 1 1 compartments, means vidinge hooked connection between the of ssid'me'mbem and said beams means limiting ,the raising of said members byseid droppage, and means for supplying air to said compartments around the sides of said lower leadfor placing the upper lead under draft. 1

.6. In a furnace, the combination of an endlessehaimgrate having upper and lower leads, stools it the sides o as: Erato, beams extending transversely across t e space between said; leads for dividing said space into a pldrality of compartments, .menns associated with the upper portions of said,

beams and Jen said upper le tor presiding air seals between'ssid compartments along the to? of said beams, an anfilo plate secure to the lower rtion 0 each beam, a plurality of co members hooked over said angle plates: and b'earingdownward against the up r surface of said lower lead, mem- -bers justably mounted on said stools at the ends of and beams for. keeping the interposed'shoe members in contact with each other, and means for supplging air to said compartments around the si es of ,said lower lead 10: placing theupper. lead under 7. In I, furnace, the combination of an endless chain to having upper. and lower leads, uprigh stools stone side of said grate, members extending between said stools alon the side edgs of said upper and lower lea and supporting the some, ledge it, artments openin ging the under side of in draft.

plates adjustably mounted on said members or the respective grate leads, means between said leads for dividing the space therebetween into a plurality of transrerse eom cad, door frames carried by said homes for closin the opening's therein, a single conduit lower lead and common to all ofsaid com- Hlartments for supiplying air thereto, means 'vidi saidcon nit from said lower lead, lstes tween said stools and extending rom saidfremes to upper ledge plate supports and the door of said conduit, respectively, for providing air diicts from saidcondult to said compartments, dampers hinged to the lower ledge plate supports, one for each duct, and means for actuating said dampers.

8.-In1 a furnace, the combination of a grate havin a traveling portion, stoolset the sides 0 said grate, members between said-stools and extending under side edges of said traveling grate portion for support upward to said \1' per tween said stoola: oors 0 said 1 ing the some, said members being of cast metal, and wear strips of harder metslsecured to said cast members and on supplying-air thereto, the ducts on-one'side' so of said grate beingeopposite the ductson the other side thereof, a hinged' damper for each duct, a lurality of shafts of various len hs exten ing into said conduit betweenv ,eoi ducts, said shafts being telescoped on each other and arranged one for each set at to ducts, means connectinieweh shaft h the am ers of itsopposi ducts for opening and c osm the same, and means for actuetingsaid sh ts and independently of each other. testimony that! claim the fore ing as my invention, I atlix my'signntnre t 's 10th day of December, A. D. 1921,

HERMAN A. rorrssnosssi.

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