US1428128A - Boiler furnace - Google Patents

Description

B. F. WOOD.

BOILER FURNACE. APPLICATION FILED My 29, 1917.

213%285 i 28; Patenteal Sept; 5, 1922 *3 2 SHEETS-SHEET I.

N f INVENTOR.

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B. F. WOOD.

vBOILER FURNACE. APPUCA'TION FILED MAY 28, 1917.

1,42 198,, PatentadSept. 5, 1922,

2 SHEETS-SHEET 2.

a N v EN 10 R BEMWMIN fi Wacm Patented hiept. 5, W22.

Uhii'lfE h i td ti earner est tes.

BENJAIIIIN F. WOOD, F MAPLEWOOD, NEW JERSEY, ASSIGNOR TO THE EABCOCK a \VILCOX COMPANY, OF BAYGNNE, NEW JERSEY, A GOEPORATXON OF NEW JERSEY.

BOILER FURNACE.

Application filed May 28, 191.7. Serial 11's.- 171,403.

To all whom it may concern:

Be it known that I, BENJAMIN F. W0oi5za citizen ofthe United States, residing at a plewood, in the county of Essezi and State of s New Jersey, have invented certain new and useful Improvements in Boiler Furnaces, of which the following is a specification.

My invention relates to boiler furnaces and will be understood by reference to the 10 companying drawing in which Fig. 1 is a vertical longitudinal section, more or less diagrammatic; Fig. 2 a vertical longitudinal section of a modification; Fig. 3 is a sectional view showing the arrangement of the ventilating pipes; Fig. i is a sectional view showing the outer end of oneof the ventilating pipes on a larger scale; Figs. 5, 6 and 7 show in detail one form of means for holding the bridge wall in alinement, while allowing free movement thereof in a generally vertical plane, Fig. 7 being a front view with some of the parts broken away along the line 7'7' of Fig. 6', Fig. 6, a vertical section on Fig. 7 and Fig. 5, a plan view, partly in section and on a reduced scale, of Fig. 7

For the purpose of illustrating one application of my invention, it is shown in connection with a Babcock and Wilcox type of water tube boiler having an inclined bank of so generating tubes 1 expanded into' front and rear headers 2 and 3, the headers being connected in the usual manner to a longitudinal steam and water drum 4. In the space between the, bank of tubes and the steam and SE water drum is a,superheater 5. The bank of tubes is divided by battles 6 and 7 into three transverse passes, the eneral course of the gases being indicated y arrows, the gases nally leaving the boiler through the out to let 8.

The boiler is shown as fired by an underfeed stoker of standard type the fuel being fed through retorts 9 into the furnace below the front wall 10. At its lower end the at stoker is provided with the usual dumping plates 11. The pipe 12 is embedded in the side walls and from it a number of smaller pipes 12 pass through the wall and preferab y terminate a short distance from the into nerface of the wall, and opposite each pipe an openi n 12"- is left throu h the brickwork for t e passage of air, ashest shown in sively decreasing Fig. 4. The same air blast which supplies the stoker supplies air to the pipe 12 and the air escaping through the smaller pipes flows so upward along the face of the wall. This construction has been found highly efficient in preventing clinker from becoming at tached to the wall.

At the rear of the furnace is a bridge wall 13 extending from the furnace floor to the lowermost row of tubes ofth'e-bank 1. A longitudinal baiile 14 extends from the upper end of the bridge wall to the battle 6. The baffle 14; is shown as extending forward from a cross bafile 14' and as resting upon the tubes of the second row from the bottom so that the two lowermost rows are exposed to the radiant heat of the furnace for the length of the tubes which come above the furnace. This trapping out of the radiant heat assists in maintaining-the furnace brick work as it causes a reduction. in the furnace temperature. With the headers and battles arranged as shown, it will be apparent that the gases in their upward movement over the boiler tubes are caused to pass over progresflow. areas.

In the lower art of the bridge wall 13 is an opening 15 c osed by a suitable door 15'. so This opening affords access through the bridge wall to the fire above the Stoker and also for handling any clinker which may aocumulate upon or above the dumping plates 11, and also for removing any clinker whlch may accumulate in the vicinity of the outlets of the small pipes 12. A lower floor 17 15 provided on which the operator would stand in etting access to the inner side of the bri ge wall through door 15'.

In Fig. 2 a modified arrangement is shown in which there is an additional opening 16 through which rods may be introduced to scrape off any slag which may collect on the lowermost boiler tubes of the first pass.

Back of the bridge wall and above the opening or openings therein, is a door 17 extending from the bridge wall to the rear wall 18 of the setting. part of this floor is below the third boiler pass and any dust lot which is deposited from the gases as theyv flow through the second and third passes will accumulate in the pocket'19 from which it may be removed through the chute and dun'iping device 20. The mud drum 21 may be protected by fire brick 22 from the heat which may arise through the combustion of the dust which collects in the pocket 19. A ballle 23 prevents undue leakage of the hot gases around the mud drum by minimizing the suction at the rear of the headers 23.

Both the front wall 10 and the bridge wall 13 include courses of special tile E t to assist in holding the walls plumb. These tiles engage cast iron bulb pieces 27 so arranged that expansion in any direction cannot cause binding.

l have here shown the bulb piece. 25 provided with T-heads 2t) engaging recesses 27 in the tiles. Said bulb pieces may also be provided with extensions 28, the ends of which engage the vertical flanges of angleirons 29, the horizontal flanges oi which may be secured to a channel-iron 3-30 embedded in a recess in the flooring, as indicated in dotted lines in Fig. l, and more fully in detail in Figs 5, 6 and T.

The means shown for holding the bridge. wall in vertical position are illustrative oi only one of numerous means that could be used for this purpose and are substantially the same as those shown in the Jacobus Patent No. 1,3415%.

The pEfOVlSlOH of a root" or floor located above the boiler floor level at the rear oi the bridge wall and the cross member associated therewith, and the comiecting means between the bridge wall and the cross member, constructed and arranged to hold the bridge wall in alineznent while allowing free movement tlnueoi in a generally vertical plane. serves a most useful purpose in the case oi high settings. such as illustrated in the embodiment of my invention as shown.

The inclined ballle 14 extending along the boiler tubes above the furnace chamber pre vents the cold air which is drawn in through the acceis doors in th rear furnace wall from laning through the furnace. Should the cold air whicn enters through the access doors be permitted to lane through the furnew and enter the s 'iaces between the boiler tubes, it would result in strains due to unequal heating of the tubes and also lead to a loss in eiiiciency. The horizontal battle causes the cold air which enters through the access doors to mingle with the furnace gases making it pass longitudinally through the furnace, and thereby effectually prevents any such laning action.

Whatl claim and desire to secure by Letters latent of the linited States is l. A steam boiler furnace and setting hav ing a bridge wall, upper and lower lioors at the rear of said bridge wall forming a shielded space for an operator, the setting being rovided Witl a dust pocket located above theupper lloor andat the rear of said bridge wall, said bridge wall being pie vided with an opening for ati'ording access to the furnace troin said shielded space. and means for removing dust from said dust pocket.

A steam boiler furnace and setting having a bridge wail, upper and lower floors at the rear of said bridge wall forming a shielded space for an operator. the setting being n'ovided with a dust pocket located above the upper floor and at the rear of said bridge wall, said. bridge wall being provided with an opening affording access to the furnace from said shielded space, and said upper floor being provided with an opening through which the dust from said dust pocket may be removed.

21in a steam boiler, a furnace, boiler tubes located above the furnace chamber and inclined upwardly toward the Front. of the boiler, uptake and downtaltc headers to which the tubes are connected, an underfeed Sl Oh'H located beneath the uptalte liader and inclined in the same general direction as said boiler tubes, at rear furnace wall extending upwardly to said boiler tubes and provided with an opening atl'ording access to the dumping plates of said stoheiz a baflle located above the furnace chamber for directing the gases forwardly; some oi the boiler tubes being exposed to the rad'ant heat of the furnace substantially the entire dis ance between said rear iurnace wall and the front furnace wall.

a. A steam boiler furnace comprising a stoker, an air supply duct tor delivering air in close proximity to the inner face of the furnace side walls, a bridge wall at the rear of the combustion c amber and openings in said wall tor the purpose desmibed.

in testimony whereof I have hereunto signed my name in the 'esence of two subscribing witnesses.

Witnesses VJALTER E. F. BRADLEY, Enennna Morison.

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