US1498875A - Regenerator and like structure - Google Patents

Description

L. v. HOWARD REGENERATOR AND STRUCTURE Filed sept. so. 1922 2 sheets-snoei 1 une Z4 AQZS 2 Sheets-SMS2 2 L.. V. HQWARD REGENERATOR AND LIKE STRUCTURE Filed sept. so, 1922 if ATTORNEYS nnnnnm,

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' tween adjacent bricks.

Patented lime 2li, i924.

i s '5f-FA T1 Si PATENT Erica.

:Ein/ran v. HOWARD, oF'NEW BRIGHTON, PENNSYLVANTA.

REGENERATOR AND LIKE STRUCTURE.

Application filed September 30,1922. Serial No. 591,672.

ments in Regenerators and like Structure@ of which improvements thefollowing is a specification. y

My invention relates Ato improvements in the structure of checkerwork, built within the chambers of regenerators, Vrecuperators, In an open-.hearth steel furnace, for example, the regenerator is a piece of auxiliary apparatus. It isa chamber filled with bricks laid dry in superposed tiers or layers, and with wide intervals be- The wholeY constitutes a heat absorbing and heat emitting body, through which a stream of gasmay [ind greatly subdividedl and devious passage.' In operation, streams of hot gases escaping from the furnacechamber and of fuel gas (or of air) approachingthe furnace chamber, alternately flow through. The hot gases as they iiow through raise fthe checkerwork to high temperature, and when in sequence the flow of hot gases is cut off and fuel gas or air) on its way to the furnace is caused to pass through instead, that stream of fuel gas (or air) is heated preparatory to combustion. Y

As regenerators (and recuperators) Vcontinue in service they deteriorate and rapidlyv lose efficiency; they become clogged with cinders and brick dust; the hot gases from the furnace chamber, still more. or less in flaming condition, and bearing solid particles, erode the bricks, and even soften and melt them and cause their substance to run; explosions of gas shatter the bricks. In such various ways the checkerwork becomes fouled and the free flow of the ygaseous Streams is obstructed. Theregenerator has then to be put out of commission, and opened, and the checkerwork has to be removed, the refuse cleaned out, and the whole rebuilt.

My invention consists in a structure which admits kof cleaning without disturbance, and of removal and replacement of parts with# out complete tearing down and rebuilding, and a structure which, furthermore, is resistant to deteriorating infiuence.

In the accompanyingdrawings, Fig. I is a view in 'vertical section through the regenerators of an open-hearth furnace in which my invention has been embodied. I-Iere are shown two regenerator chambers, one for the gas on the left), one for the air (on the right). They differ, so far as I am now concerned, yin size only, and my invention is applicable equally to both. It will be understood that in the course of furnace operation both chambers are at one time swept by streams of hot gases, and then in turn are parts of the separate conductors, through which fuel gas and air approach the furnace.

Fig. II is a fragmentary view in vertical section, on a plane at right angles to that of Fig. I, and may be understood to be a section through either of the two regenerators of Fig. I. Fig. III, drawn to larger scale, shows in side elevation and in lan a brick of the particular shape employedp in the practice of my invention. Fig. IV is a view in longitudinal section, and drawn to still larger scale, of the'support which I employ for the bricks within the chamber.

The bricks l are not stacked within the chamber, tier upon tier, as is usual, but are strung upon metal, rodlike supports, pref-- erably in the form of pipes 2, which supports are at opposite ends carried by the opposite chamber walls. The bricks are preferably strung upon the support in face-toeface abutment, brick upon brick, and they fill all the space from wall to wall. To achieve such an assembly, the bricks are perforate, as shown in Fig. III. Preferably they are provided in their abutting faces with interlocking tongues and grooves, and in assembly the terminal bricks of each string may be built into the opposite chamber walls. This is indicated in exemplary manner at 20. Thus alignment of the bricks within the string may be maintained, and rigidity of the structure as a whole increased. The assembly will be understood on comparing Figs. I, II and III. The chamber is choked or obstructed with an assembly of cross bars of refractory material extending from wall to opposite wall, the bars being sustained by the walls and independently each of the others.

In assembly, each string of bricks is con tinuous from wall to wall; eachstands spaced apart from adjacent strings, both laterally and vertically. No string carries the weight of superposed bricks. p

The particular arrangement or grouping of the strings of brick within the chamber Tala may be varied. I prefer the arrangement shown, in which the strings are arrangedin horizontal roWs, While vertically the strings of the successive rows are arranged in staggered succession.

The strings of, bricks are supported by two opposite Walls of the chamber.' The other two walls are built, one orA both of them, With blind arches 3. When after continued service the efficiency of the, regenerator isin arnrtaatla daetda attained, the @attain Walls Within these arches (or one ofthein) maybe remoyed. Scrapers ymay then `be introduced and dust and cinders deposited upon thebricks or collected on the floor. of the chamber may beremoved.` It lwill be Lemaiked, that such cleailing is quite iinposf siblefvith ordinary clieckerwvork, pr in it there are no free spaces ektending through the Whole bodyof bricllyyork, either horizontally dl Vaitaally! When a regenerator has so been opened, and cleaned, if cleaning be necessary, inspection will l-reyeal any defects ywhich may have deyeloped in anycparti'cular string oi bricks.`r That string, if therebe s uoh,imay be individually reinoyed, by tearing'out so much' of 'the opposite supporting Walls, maybe necessary, but no in and repair andi replacement 'may then follow. screen Walls Will then be replaced and the regeneratorE Will be putinY service again. ln viewA o'ivthis,` and in' distinction from the nasal' regenerate', faiy ietwat/d, att'ttttata maybe 'dtataatai'aedg as tetas atmjtfpttzaia nent.

1 have said ofthesupports for thebricks` that they iitaftratly aleta thefpiitaaf'hints 2, andan Fiss! I, and IY, I, Shear. that@ Pinta built andv arranged taf. the, Qrddatdel at Water through them. Akny preferred artassement t0 this @ad Inay taamplaytd.; 11 show circulation pipes of, Field type, in

which tllifaalatian a had thtaaalitaatantlzta passageyvays, andthis is the rstructure which I prefer. The. purpose Qt f vater adeline a, te. maar talla the pipas' rigid, and t0, eterea theta from sagging after iaalaaead taratura t0,A

intense heat. It will of coursebe true that the 'flowingwater Willcarry heat ayvay, and

to that citent will diminish the heat trans# ference primarily in' view. But this dimi; nutionis relatively small, ofcourse, the teni- Perature, and quantity di the. Qratdatas Water Willibe such as toaccomplish the end described, and ,11.0 mardi and' 1% dad that the lars@ sains, tllanatttla at daalt hai/avia daatad, vastly @Xatadtha Smalltloa'a a haat disapataa Instead Qt water, ai? may be employed, 01 @van Steam, t0 flaw through the piped Zand kaap their. temperature battu' tha Point at unduasafttaaa The. irarttf ttlar tluid @replayed Willdartnd 01,1 tirada* stances 'andfon temperature conditions.

It maybe found desirable, particularly in large chambers, to support the strings ot' bricks vertically at a point or points intermediate their length, and in such case auxiliary` supporting yvalls suclras that indicated at ai, Eig, I, may be built up as the regenerator is built. This Wall may, if oppositesidesof thechannbers are eXterally accessible,constitute the inner anchorage and resting place for two opposite strings of bricks, 0r it may, as indicated. in Fig. I, be an intermediate support' for strings of brick which, yextend in continuity from Wall to Wall of the regenerator chamberl and, in` that case, removal2 of any onestring will involve more or less complete remoyal of this supporting` wall I have described my invention in its application tol regenerators of openhearthgfurnaces` clearly indicated at the begin- Itis, it iS appliaabldta Qha'akattyalk built inl a chamber, lWhateverbe,the association in ahaha t@ tea,

I claim. aS my inyentiQH 1`. preheater "for gaseous substance which consists lof a` chamberl with entrance andexit for a gaseous`stream,"the `lspace Within said chamber being obstructed by a plurality of bars ci refractory teiialfeach bar indepenheiitly supported-,ok by opposite chamber Walls.

Q. 'A preheater for gaseous substance which consists'lf a chamber with entrance exit for a gaseousfstream, a v1:;lural-it`y of.y -rod-like 'supports eX,teriding across the chamber-`fromvall to Wall, and aE body of refractory materialienvelopingy and carried by tattered-11kt aanpast.-

` preheater Y for gaseous substance which consists Q a chamber With entrance andexit forv a gaseous stream, a plurality 'of rodlike supportsextendingacross thecliamber fromfvv'alltovvall, and, a seriSvof interlocked bricks strung 'upon and enveloping each rod-'like is; pport. i z A 4c. A prehea er for gaseous substances which consistsofl a chamber with entrance andeXit for 'a gaseous stream, a plurality of internally 'cooled supports extending from wan te 'wan within the' Chamber, eine' aobody of refractpry'matxerial enveloping land caraaaty @at appart.-

5. A preheater for aseous substance which consists of a chamA lerl vvith entrance and exit for a gaseousstreani, a pluralityof pipes QXtending across the chamberj'froin of `a"plurally individually independent' bars of refractory material. extending'hri- Zontally across the-,chamber andfariiangedliii a Vertical succession of horizontally extendother chamber walls beinr built with ,a blind b lng rows, the bars of the successive rows ararch filled with a screen wall. 10 ranged in staggered relation to one another. In testimony whereof I have hereunto set 7. In a regeneratory or like structure, the my hand. 4 5 combination with the regenerator chamber LEHMAN V. HOVARD.

of a plurality of individually independent Witnesses: cross bars of refractory material extending` FRANK C. OROUKE, between opposite chamber Walls, one of the THOMAS S. CALHOUN.

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