USRE4150E - Delphia - Google Patents

Description

tintin-ti gieten @stent ctjiiiire. I

.mams rrnnnnnson, 'or new YORK, Y., AND JASPER ai..LAWFORIL on PHILA- DELPHIA, PENNSYLYAXIA, ASSIGNEES OF JOHX PLAYER, DEGEASED.

Letters Patent No, 65,600, dated June 11,1867;

IMPROVEMENT IN AerARA-rus patented in England', Marchv 25, 1865*; reissue No. 4,150, dated 0cto ber11,1870. l

Fo'R HEATING vrI-IE BLAST sMEL'rINo-Inomac.

Fon FoR'NAcEs u sEo IN The Schednle referred `to in these Letters Patent and :making part of th'e same.

lTonllfII'I0II t t'tmay concern.- I

Be it knowII tl1at JOHN Paaren, deceased,- for- .t Philadelphia, in the State of Pennsylvania, inhis lifetime invented an Improvement in Furnaces or Apparatus for Heatngthe Blast for Furnaces Used in Smelting Iron and for other Furnaces, of which im' prove-.nient the following is a specification.

Before the said PLAYERS invention of this im prove- Inent, the waste `gases ot' blast-furnaces had been util-' ized for heating the blush-but owing to the character ofthe apparatus employed, the gases being ignited o r becoming inflamedV in .thepipe-chamher, and the.

fiam'es beinglallowed to playdirectly and freely up'on and among the heating-pipes or the passages lin'which the blast is heated, the heating ot' these pipes or pas sages, and of the blastnitselt', had been very irregular and unequal, the ,pip is being, moreover, rapidly destroyedby this direct action of theiia-mcs. a

The invention herein claimed consists 'in an inn proved blast-heating apparatus, in the operation of which the waste gases are conducted from afm-nace directly to, and are ignited and consumed in, a combustion-chamber, separate from, but communicating with the pipe-chamber, or the chamber inwhich the blast-heating pipes or passages are arranged, which last-mentioned chamber is by preference situated above` the combustion-chamber, and the -heated vapor or' fume thus 'generatedby the Lcombustion ot the gases in the combustion-chamber passes, through numerous narrow openings iii its 7top, into` the pipe-chamber, where, without any. indication of flame; and without the irregular, unequal, injurious action of ame, it

surrounds the blast-heating pipes with an equable atmosphere of 'very high temperature, and thus neces# sarily acts equably, not only upon all o f the pipes,butf

upon each part of' cach pipe immersedin this glowing atmosphere. v l j' Thelchamher in which the hlast-heating pipes or passages are arranged is of such `relatively llarge dimensions as to leave ample spaces between and around vthe pipes, in which spaces the-vapor and fume fmm the combustion-chamber, without being or becoming inflamed, maintain the highly-heated atmosphere in continual action upon the blast-heating pipes, as above described, and thereby sustain the blast at a more constant and'more uniformly high temperature than before said PLaYEBsinvention had been attained in using waste gases forthis purpose, at vthe same timel relieving the -pipes from the rapidlydclctorious action of ilam The accompanying drawing, which is'on a scale of vone-fourth of an inch to the foot, showt` a double air- -heating stove, illustrating said invention, 'but the two stoves being symmetrical, and each letter of nefcrence f 8, and 9.

indicating, wherever used, the same part'iu either of them,the description is given as of one only.

lEach of these stoves is of dimensions and capacity suitable for heating to a temperature of about 1,200o Fahrenheit about two thousand three hundred cubic. feet of`air per minute, at a pmssure of two anda half pounds per square inch. The dimensions and arrangementsl shown in the drawing are of said PLAYERS approved construction, but'rnay bc varied in the details without departing from his invention. Figure 1 is a cross-section through the stove;

Figure 2, aneud elevation; Figure 3, a. side elevation; Figure 4, a plan or top view Figure 5, aYhorizontal'longitudinal section through thel stove at the line w w of iig'.'1;

Figurel (i, a vertical longitudinal central section; Fignre 7, a horizontal section at thejline xx offig. 1 Figure 8,. a similar sect-ion at the line y y-ofg. 1,'y with thepipes removed; and

Figure 9, asimilar section at the line z z of fig. 1. The drawing indicates a. gas-due leading directly from the furnace to the combustion-chamber.

. A- is Ithe combustion-chamber, having an arched top, a, through which narrow openings e extend from the combustion-chamber' to the pipe-chamber.

Above this arch, and on each side. of the narrow openings e, are arranged short troughs B, one for each' row of pipes, (iuthis instance six in number,) of rectangular section, and closed at each end. "Each of these troughs extends horizontally across the stove, between the .two blast-fines hereinafter described, and is 4dividedby afcentral partition, b,'and has a top provided withsoekets-b', to receive the endsof the blast-heating pipes. 'lhe blast-tine G, by which the-air to be heated is led to the pipes, is also of rectangular section,- closed at `one end, and providedat the other end, which projectsfo'utside ot' thejst'ove, witha regulating-valve,d. A similar tlu`e,1), also having a valve, d, on its projecting end, conducts the blast away from the stove, after it has been heated. The top of eac-h of these'ues is flush withthe tops of the troughs B, and is, like them, provided with corresponding sockets to receive the -ends of the blastof the top ot' the combustion-chamber, one at each side lof the stove, s o as respectively to extend across either end-of the troughs B and openings'e, figs. 1, 7,

Above these' troughs 'and blast-fines is the pipechamber E, which has a valved chimney, G, of the usual construction.

In 'addition tothe numerous narrow openings e in the arched top ot the combustiott-chamber, between er the flames leaping up into them from the comvt'orm thickness voi' metal, andfeonsequent-ly inone limb of each of the six pipes 4into which it :he troughs or'rowsot pipes, there are also, in this instance, openings e from the combustiouehamber up through the foundation into the pip'eehamhe-r at each side of the stove, between the shell und -the blast-nues, which openings c', al-` though 'wide at the top, are narrow for the main part of their length or depth, so that these openings, being numerous, afford ample and free passage for the "apor and fume from the combustionr chamber to the pipe-chamber, but, being at the same time narrow :und deep,lthe'y tend to smothbustion-chamber, and exclude them from the pipechamber, thus preventing the vapor or fume in the {npc-chamber from becoming inflamed.

The"blast-heating pipes F are made by preference of an inserted' U-shape, as shown -in the drawing. At the top of each limb ot' the pipes is an an opening, to facilita-te the removal ofthe cores from thelpipesai'ter 'they are cast. i These openings are closed by stoppers when the stove is at work. This construction of thehlastfheating pipes with a, rectangular or box top is praetically valuable to the founder, as it enables him to cast the pipeveitically, in the same manner es water-pipes are east, and thus secures annicreased durability. The end of thecore-barrel projects through the opening in the top of the pipe. It is found, moreover, that this rectangular Vshape given to the tops of thesepipes increases the action of the heat upon the blast passing through them, and diminishes the injurious action of the externa-l heat in the chamber E upon the top of the pipe, asa larger surfaceis thus subjected to this action, and the blast is acted upon through a correspondinglyfenlarged area.

The lower ends of the'pipes are secured, so as to make air-tight joints, inthe sockets lprovided for them in the blast-fines and in the troughs, and so hat the'pipes on one side of the stove' straddle.v the blast-'tine C and the troughs B, the middle row strnddles across the partitions b in the troughs B, and therow on the 'other side of the stove .st-raddles the troughs B and the blast-tine D, so that the air to beheoted 'enters the blast-tine C at one sideof' the stove, ascends opens, descends into the six troughs B, ascends and deseen/ ds the next'six pipes, straddlingl the troughs B, and vthen-ascelfldsone limb Aof the next six pipes, and descends into the exit' lblast-flue D, havin g becomehighly heated in its transit across. the stove. 1

chamberA where they are ignited andeon sumed,

and generate an intense heat.; but the interposition ofthe arched top between the' twoehambers, or the removal of the pipes so for from the combustionchamber, the numerous but deep and narrow openingsor communications between the two chambers, and the 'exclusion of atmospheric air from the pipechamber, prevent the-flames of theignited gases in the 'ombustion-chamber from reaching' or extending o the pipe-chamber, so 'as to injure the pipes, or to in'ame the vapor or fumein the pipe-chamber while the vapor or fume iills the 'pil'iecha-mber with a glowing utmosphere, without any indication of flame, as already set forth.

The admission' of the blast,.its traverse through l the pipes, and its exit from the stove,.having been already described, neednot be repented. l

What is claimed as the invention ot' the said JOHN lPLAYER is- The combination, in a, hotblast sto\eof a combustion-chamber in which the waste gases from u furnace are received, ignited, und consumed, substantially as described; o separate'blast-heating chamber, from which llame is lexcluded substantially as described, and communicating with the eombustioneha-mberonly through numerous narrow openings; and conduits for the blast with in theheating-chamber, but removed from the Aaction of the flume or ignited gases, substantialfl 1y as and Afor thev purposes described. JAMESLHEN-DEBSON.

J. M. LAWFORD. AUGUSTA A. PLAYER'. HENRYV MGALLISTER, JR. Witnesses as to HENDERSON undv 'LAwFonnz S. H. DAvIs, GEO. H. BARR. Witnesses as to A. A. PLAYER:

JNO. MQKIM, T. N. SANFonD., Witnesses esto HENRY` MoALLIsrEn, lr.

S; M. vKleinsma,

Cuirs. M.- RowLEY.'

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