US578747A - John j - Google Patents

Description

J. J. HOGAN.

(No Model.)

STBAMBOILBR.

Q//n vena? [UNITED STATES 'PATENT A ()rricn JOHN J. I-IoeNjoF 'MiD-DLn'rowN, New Yoan-. f

' s TEAM-Bou Elfi.4

sPEcIrxoA'roN forming part' of Letters ratent'iiio. 578,747, dated March' 1c, 189,7.

` Q ppiction nea January 1e, 189s. sciemment. (Nomads.)

. l To @Il whom it, may concern:

Be it known that I, JOHN J. HOGAN, a citizen of the'UnitedlStates, residing at Middletown, Orange county, New York, have in- Vented certain new and useful Improvements in Steam-Boilers, fully described and represented in the following specification Vand the accompanying rawings, forming a part of the same.

. y l I j L 4 1o Thisinvention vrelates tothat class of boilers in which a horizontal steam-drum in the upper part of the boiler is connected by wa-l ter-tubes 'with a distributing-drum adjacent` i tothefre-grate; and the invention consistsvv I 5 partly in means .for improvingthe distribution of the heat and its absorption-by the' tubes and partly in means for preserving a.

' proper movement of the water with-in the distributing-drum. ,Y 2o The invention will be understood by reference to the annexed drawings, in which- Figurel is an end elevation with the nearer wallof the boiler-casing removed. Fig. 2 is a sidcelcvation of the .boiler with the smokepipeattachedand the supports beneath the 'distributing-drum omitted. l1`.ig..3 is a plan of the boiler with the casing and water-tubes in section upon. line3 3 in Fig.V 1, and Fig, -lf is a horizontal section of one of thedistrib- 3o uting-drunis on line i 4 in Fig. 1.

A designates the steam-drum, and B the distributing-drums, of which two are shown at opposite sides ofthe grate M and furnace C. Each distributing-dron1 is connected with '35 the,stealn-druln-byithree groups of tubes a l;

c, which are extended from scparaterlongitudinal portionsof the distributing-drumto separate longitudinal portions of the steam.- )di-u1u. The casing J incloses the boiler adja- 40 cent to the outer4 groups yof tubes, and the tubesof the inner group are projected inwardly `from the. distributing-drum, over the grate', and upwardly to.the bottom 'of the steam-d um and conduct the. ascending current bet eensueh drums-throughthe furnace and lire-box, a's they are' exposed to the greatest heat of the tire.

lartitions e andfare extended upward and downward', respectively, from the distribut- 5o ing andsteainfdrunis lollgitudinally of the boiler between the groups of tubes u, b, and

v, iorniinga descending flue E and an ascendingue F. An openingGextends from the`upper'end o f the ascendingilue to the chimney I. i

i The tubes c are preferablyarranged," as

shown in Figs. 1 and 3, to' form a close wall of water-tubes next the casing to prevent wasteful radiationofA heat. The tubes ct are sloped inwardly and upwardly from the drums 6o B to the bottom of the tire-box D, and a wallj K, ofrefractory material, like re-brick, is arranged in the furnace to absorb the heat of .tle fuel and is formed upon its upper side.,

with inclined surfaces adapted to radiateheat Adirectlyto the lower partsof tliejftubes; cr.

Fire-doors L are shown in Fig. 1 for introduc" ving fuel to the furnace at opposite; sides.v of

the wall K, and the same is'thus heatediby lthe beds of fuel at its adjacent sides andlop- 7.o

erates'powerfully to convey-such .beat inthe most effective manner to the ascending watertubes, l

The-tubes a` are obviously exposed to thel greatest heat of the lire. The tubes c are ex- `7 5 posed to the gases only after their heat has V been chiefly abstracted, while` the tubes b, which pass through theiutermediatellues E,

are at an intermediate temperature. =The tubesfa thus provide eectively for the as- 8o cending current of fluid and the tubes c for the descending current, while the tubes b are adaptedl to conduct the fluid either upward or downward, according to the lconditions which prevail at any given time. 1 rlhe water-tubes most remote from the fire are' commonly used to convey tothe distributing-drum the descending current of' fluid; from which drum the water is supplied to the ascending current which rises' within the 9o hotter tubes. y Heretofore 4a guard or partitiouhas been extended a part of the way downward within the top of the descending drum, ,between the inlets from such groups of tubes, and in some 95 posed to the.directheatofthejirc the ebulition "is, liable t drivetlie wateipward within the 1 oo tubes which are'proyided for jf'lownward currents," and`the proper circulatidn within the tubesfistl'iusinipded ,""i'

In the present invention I ani er bledto utilize the direct heat of the fire upon the distributing-drum and to maintain the dcsired movement of thc water-currents by eX- tending a complete partition g longitudinally Within the distributing-drum ncarlyto its opposite ends and introducing the descending current of fluid upon the rear or colder side of such partition. By this construction the water upon the front side onlyxof the partition receives the heat of the fire, and the outlets of the descending currents are protected from the rising current of fluid, which is diverted by the partition whollyinto the tubes provided for the ascending current, as indicated by the arrows t in Fig. l.

The spaces h shown in Fig. 4 at the ends of the partition g afford a free communication from the rear tothe front side of the same.

The operation of the construction is as follows: The heat of the fuel is absorbed partly by the wall K and radiated to the tubes a, while the heated gases which rise through the furnace, as indicated by arrows Z in Fig. 1,

enter the upper ends of the lues E, as indicated by the arrows m in Figs. l and 2, and pass from the bottom of the same into the fines F, as indicated by arrows n, escaping `finally to the chimney I by the fine-openings G, as indicated by the arrows o in the same figures. The water and steam rise in the tubes a and are separated in thedrum A,

where the water-line w is indicated. Such separated water descends constantly thro ugh the tubes c, enteringl the drums B upon the outer side of the partition g, as indicated by the arrows p in Figs. 1 and 2, the shell of the drum being broken away at one end to expose the partition and inlets from the tubes c.

The water received upon the rear side of the partition passes freely through the passages' h at the ends of the partition, as shown bythe arrows u in Figs.v Zand 4,' and thus replaces that which enters the ascending tubes, the lower ends of which are indicated in Fig. fl. Vhe'n the fire is sufficiently het to generate steam in the tubes b within the intern'iediate fine E, the current passes upwardly in such tubes, l'but when the heat generates steam in the tubes a only the tubes b carrya descending current like the tubes c, which enters the tubes a, as shown by arrows t in Fig. l. The tubes a are extended upward above the water-line of the boiler to discharge their steam withoutobstruetion, but the tubes bare extended upward a part only of the way to the water-line, that they may carry a downward current when required. The above is the normal action when there is in operation, but

a direct draft to the chimney may be secured when kindling the fire by a passage G', leading from the fire-chambcr D into the breeehing H, with a damper NgDFigs. 1 and 2, to open the sanie when required.

The furnace is shown with two grates and fuel-doors L and one radiating-wall K, located between t-he same; but it is obvious that in boilers of large proportions a greater numas are described herein, and the partitions e l and f would furnish the double return-fines, which would be connected with the chimney by outlet G from the top of the ascending Hue, as shown herein. A damper f' may be inserted in the ascending fine F, as ,shown in Fig. l, or in the'smoke-outlet Gto check the draft when desired, and thusretain theproducts of combustion for a longer tilne'in'contact with the tubes. f

The partition g extended from the topl to the bottom of the distributing-drum, with passages 'h at one or both ends, is adapted to perform the function described herein in any ing tubes are arranged in longitudinal groups and connected with longitudinal portions of the distributing-drum, so that the partition can be inserted between their inlets. It thus serves to separate the ascending and descending currents wit-hin the distributing-drum and secu res a much more rapid and perfect circulation of the fluid.

Having thus set forth the nature of my invention7 what I claim herein isl. In a boiler, the combination, with a steam-drum sustained above the fire-grate, with distributing-drum at the side of the grate, of groups of water-tubes forming ascending and descending channels for the water, and connected with separate longitudinal portions of the distributing-drum, and a partition extended from side to side of the distributing-dru in between the mouths of the ascending and descending tubes, and arranged with passages 7L between the ends of the partition and the heads of the drum, the whole arranged and operated as and for the purpose set forth.

2. In a boiler, the combination, with a steam-drum sustained above the lire-grate, with distributing-drum at the side of the' grate, of three groups of water-tubes extended from separate longitudinal portions of the distribl'lting-druin to separate longitudinal portions of the steam-drum, substanti lly as set forth, a easinginclosin g the bei ler adjacent to the outer groups of tubes, the partitions e and f extended upward and downward longitndinally of the boiler between the groups of tubes to produce descending and ascending smoke-(lues, a lire-box over the grate, and the outer flue having the chimney-opening G at the top, as and for the purpose set forth.

S3. In a boiler, the combination, with a steanrdrnrn sustained above the fire-grate, with distributing-drum at the side of the grate, of three groups of water-tubes connect- IOO IIO

ing the steam and distributing drums and ar- 578,747 l Y i s ranged substantially as set forth, va casing in- 'closing the boiler adjacent to the out-er groups of tubes, and the partitions f and c extended respectively downward .and upward from the steam and distributing drums between-the groups of tubes and producing descending and ascending smoke-fines, a lire-box over the grate, the breeching I-I with Hue-openings G and G connecting the ascending flue and the fire-box respectively with the breeching, and the dampers N and `f' applied to such openings, the whole arranged and operated substantially as herein set forth.

4L. In a boiler, the combination, with a steam-drum sustained above the regrate,` With distributing-drums at the opposite sides of the grate, of three longitudinal groups of svater-tubes connecting each of the distributin g-drums with the steam-drum, and arranged substantially as set forth, a casing inclosing cending smoke-Hues, a fire-box over the grate, f

a breeching l-l with line-opening G to such lire-box, and flue-openings G from the tops of the ascending fines to the said breeching, with dainpers N and f for connecting the fire-box and-the ascendingiue respectively with the breecliing, the Whole arranged and operated y substantially as herein set forth.' l

Init stiniony whereof I have hereunto set witnesses.

, ssj niy-lcg'and in the presence of /two subscribing l JonN J.1-IoeAn.A

Witnesses:

L. LEE, EDW. F. KINsEY.

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