US1517440A - Air-cooled soot cleaner - Google Patents

Description

1,517,440 F. W. LINAKER- ET AL AIR COOLED SOOT CLEANER Fild Oct. 18. 1921 2 Sheets-Sheet 1 Deg; 2, 1924.

F. w. LINAKER ET AL AIR COOLED SOOT CLEANER FiledOct. 18. 1921 2 Sheets-Sheet; 2

Il il Patented Dec. 2, 1924.

UNITED es Per sell r-Joaquin S0071 CLEANER.

Application filed Qqteber 18,15521. serial lio. 508,604.

To it t ..13.e-it known that weglilrzunemoii "L N- A gmz a-nd' THEono u M; BRuBAGK, the former a subject of the King ofiG reat YBritaiimand the latter a citizen of the United jSta-tes of Ameriee, both resid ng .Dubofis, the eounty i f GIeeri-ieId iegildstate of Pennsyld eertain newenduseftil r eeledifio,ote(lleeners, Qlle @eei'ficet'ie ol llhisqinvehtieu ates-ted ioimcleen- .ihg...tuhes the ihiterior heats of boile s, erle e teens, the likeric mmehlf ik-h w end 'eimsxte epmtldie immehtsthen iu- 'ese,soeteleeeens wheeethecleanenelemem is permanently mounted in e hot "p art of vthe fii-rheeeor bo er setting th e is ebility of the cleeuer element being burned .out r-init ed by he heat during the period ofkdisuse when it is not .clooled by the flow throughit 01? a cleaning fluid (us ys eemi- To-ptoteot sucheleanereebmeut y from injury by heatjthasbeen'pnoposed tosurltound the element ith I te piiee \lo ieolke '4 nd sense a eooling fluid rto simulate thmug each *j-ec'ketgeinL-ones ihs anee water has been used as the ;Q.Oling mediums; iuenother {instance ,ithes been proposed to useeir essueh I116- dium- The present invention provides improved cooling means designed ,to zsuceessfliuslly eeol the elementby meebnsvof .2151: V

Accerdingtothe present iuventionth eoot eleeher e em nt is 'Jfsurrounded by ,e \co l l g jecketrthrough Wh e outer 'isidrawn by -suetion,,othesuction being, due to a connection with the fu rmmewdrzrftesozlocated that h air flowing through the jacket is. not discharged into theiumeeei will dilutethe fire eases, but'is -i-ntrodecediheyoud wherethese igesesecthp the'heiler tuheSJhatis:t sey,

beyond the fi al pass though the boiler struetlueso esto-mihglewit he pen g s s 45 ,eudbe drew-chewy tbrtherste k- -;0 he1'i tures ozf im'pnouemeet willhe hereineiter set ,ertl1- iS-eveml embod ments; the inyenti nar-e rillistmted t e. eceompenying-drawingslheseiddmwingsw igt rel is at. longitudinalsectional viewiof a .eleener embodying the invention and pipl'ifidiibfl i1leh0i1r5theyiewbees-J e; em-u b neath ;.es.;u1theated by the exmWJ-mE g, .6,

boiler.

Fig.2 is a similar View of a 5560.115- ill oidificetion, showingr the {device applied to one boiler of a battery.

Fig. 3 is a cross section on the vline III-11]; Fig. 2. e

4 is a section on the line IZVIV, Fig. 2. V K v Fig. 5 ,is a iew i11.c1'oss ,sectioni'llustrating 1e-.,third;embodiment. of theiinxvention.

,"Fig. 6 1s -a seotliomil slde elemtionef a beilerof thefBzibcoek "Wilcox tyge audits setting, sk wing theileeetionrooitheeleen element and pipin o t flu said drewi gs,,:numere1 I1 iilesig etes cleaner tube .orelement, here shown-es offthe rotary type, provided with a sprocket wheel 2, and conneetedto oat-steam line )3, through 121 st-ufling box or the like 4:. 'Sai'dtube or element 1 isprovided withnozzlesor ori'fiees 5 through which jets of cleaning fluid asfor example steam, are projected upon designed parts of the interior. ofa boiler, and, as Wiil .be readily understood, the jets redirec't-efd I upon @difiereut parts ,of the-boiler by rotating thetube or element by means of the sprocket 2. When such cleaner elements-pr tubes vare located in hot parts of a boiler thegmeml is apt to become burnt, ortosoften, causing the tube tobend, thereby very much shortening the life of such elements. viElence,,-esp.e cially Where such cleanertubes or demerits are located in very hot parts of theboiler set-- ting, it is desireble-toprovide means forcooling said tube or element. Such cooling means conveniently ;.comp.rise a tube orfjecket 7, preferably concentric with the, tube-l, with a space 8 between said tubes,,iior the .iiowof cool air drawn from outside theboiler. The tube or jacket 7 is w,conve-n'ientlyheld in spaced relation to, and. eflixed ,to., ithetubeor element 1, by suitable means, .as fior exam: .ple, set screws 9. i The tubeorjacket ,Tisrin communication with the outside air, as through an opening 10in theend of the tube vor jacket 7, said tubecor jacket 7-p1zeferzibly being ,madeto extend. to theextr-rfibr of the The spacer8 inthe tubeor jacket 15,5150

in communication with a means for findudng a flow of cool air therethrouglysuch being (most conveniently) the dtajftmeans of the boiler or furnace, jsaid spece 18;being connected to a suitable pert 35f P129516 setting where the draft is ractive es bytmeans of a suitable tube or geontluit jijhene :;is

preferably provided a box 18 in the boiler wall, with which the space 8 in the tube 7 communicates, and with which the conduit 12 also communicates. The box 18 also conveniently provides a bearing for an. end of the pipes 1 and 7. I

The draft of the furnace acting through the conduit 12 induces or creates a reduced pressure in the space 8 within the jacket 12, thus inducing or creating a flow of air through the opening 10, the space 8 within tlie jacket and the conduit 12 to the interior of the boiler setting, or to the breecnf or smoke stack, or any suitable point he ond the active boiler surface. This result may be attained by carrying the end 12' of the conduit 12 through the furnace wall and into the boiler setting to the position shown at 12 in Fig. 6, which in the case of a boiler of the Babcock & Wilcox type here shown or any analogous construction brings the outflow of air at 12 to the top of the third pass and beyondwhere the fire gases act upon the boiler tubes so that any cooling or dilution of the fire gases by the influx of cooling air does not detract from the heating effect upon the boiler tubes. 1

The arrangement thus far described is that for a single boiler where access can. be had to the furnace walls on both sides. Where boilers are arranged in a battery or with any arrangement where access can be had on only one side a different arrangement is required, since the outside air must enter and the suction be taken off from the same end of the jacket on the same side of the boiler. In such case in addition to the boa; 13 located at the end of the element opposite the entering end of the cleaning fluid, a box 15 may be provided, as shown in Fig. 2. The tube or jacket 7 preferably extends through the box 15, said box 15 being in communication with the interior of said tube 7 through an opening 16. The conduit 12 (on which acts the draft ofthe furnace) connected to the box 15. Packing glands 17 may be provided upon the box 15 around the tube or jacket 7. The tube or jacket 7 may be partitioned as shown in Figs. 2, 8 and l, to provide for a flow of cooling fluid lengthwise of the tube or jacket in one direction and a return flow in the other direction. The space within the tube or jacket '4' 'inay be divided into two parts, as by means of bars 1818 as shown in Fig. 3, providing two spaces 20 21 within the acl-zet 'Z. The space, as for example the space 20, at the end of the tube which communicates'with the open air is preferably stopped or closed, as indicated at 22, Fig. at, an inlet for air being provided at the open end 23 of the other space 21 within the tube 7.

The draft of the furnace acting through the conduit 12, box 15 and opening 16 creates a reduced pressure in the space 20 within the jacket, which in turn reduces the pressure in the other space 21 (the spaces 20 and 21 being conveniently in communication through the box 13) and thereby induces or creates a flow of air through the inlet 23, through the spaces 21 and 20 and thence to the interior of the boiler setting through the pipe 12.

Another form in which the jacket may be partitioned is illustrated in Fig. 5. As shown in said figure the pipe 1 for conveying the cleaning fluid, except at its inlet end, is offset, as indicated, and a pipe is placed along with it in the tube or jacket 7. The tube serves to conduct air from the inlet in front of box 15 to the opposite end of the tube, the. return flow being through the spaces 26, surrounding the two pipes 1 and 25 within the jacket 7.

It has heretofore been proposed to cool acleaner element'by surrounding it by an outer pipe or jacket taking exterior'air through a small tube within the cleaner element leading it thence into one end of such jacket and providing at the other end of the jacket within the furnace chamber a series of perforations for the escape of air. lVith such construction the flow of air is must be small enough to avoid obstructing that because of such restriction the flow of i'reatly restricted because the air inlet. pipe air is inadequate; while the discharge of the cooling air through perforations at one end of the cleaner element involves the cooling and dilution of the fire gases at that end. the cooling effect of which continues for a considerable distance on that side of the boiler, which not onlv diminishes the steaming capacity of the boiler but also produces inequalities of temperature which occasion unequal strains in the boiler structure. All

such defects are obviated bv the present invention which enables air to be circulated to the full capacity .of the jacket thereby accomplishing a maximum cooling effect, and this is attained without dilution or cooling of such gases until after they have passed beyond the active'boiler surface; thus in the annular space within the jacket, which defeats the operation of the cooling means, The inventive ideas as herein set forth may receive other embodiments than those herein specifically illustrated and described.

What We claim is:

1. A soot cleaner element having an encl'osing jacket open at one end to the outer air and a conduit leading from the other end and terminating in communication with a portion of the furnace where the fire gases have passed beyond the active heating surface of the boiler whereby the furnace draftinduces a copious flow of air through said jacket to cool the element, and the air discharged from the jacket does not dilute or cool the combustion gases until after they have passed beyond the heating surfaces of the boiler.

2. An air cooled soot cleaner element having a jacket open to the atmosphere at one end and a conduit leading from the opposite end of such jacket to a point between the active heating surface of the boiler and the furnace stack Where it is subjected to a strong suction for drawing cooling air through such jacket, whereby the air discharged from the jacket does not dilute or cool the combustion gases until after they have passed beyond the heating surfaces of the boiler.

3. An air cooled soot cleaner element comprising a surrounding jacket open at one end to the atmosphere, a longitudinal partition within such jacket with a chamber at the opposite end connecting passages on opposite sides of such partition, the air inlet communicating with one such passage, and a conduit leading from the other passage at the inlet end and terminating in a draft connection beyond the active heating surface of the boiler.

In Witness whereof, we have hereunto signed our names.

FREDERICK W. LINAKER. THEODORE M. BRUBACK.

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