US299894A - woods - Google Patents

Description

(No Model.)

G. T. WOODS.

STEAM BOILER FURNACE.

Patented June 3, 1884 NITED STATES PATENT QFFICE.

GRANVILLE T. XVOODS, OF CINCINNATI, OHIO, ASSIGNOR TO EZRA W.

' VANDUZEN, OF SAME PLACE.

STEAM-BOILER FURNACE.

SPECIFICATION forming part of Letters Patent'No. 299,894, dated June 3, 1884.

Application filed J une 19, 1883. Renewed May 12, 1884. (No model.)

T at whom it may concern:

Be it known that I, GRANVILLE T. Woons,

a citizen of the United States, residing at Cincinnati, Ohio, have invented new and useful Improvements in Steam-Boiler Furnaces,

of which the following is a specification.

My invention relates to steam-boiler furnaces, and is designed to increase their efiiciency by promoting combustion and economizing fuel; to which end it consists in the provision, construction, and arrangement of an auxiliary bridge-wall, in connection with a forced blast, as and for the purposes hereinafter more fully set forth.

In the accompanying drawings, illustrating my invention, Figure 1 is avertical section of the furnace-setting of an ordinary flue-boiler, taken longitudinally through the fire-grate and rear combustion-chamber; Fig. 2, a front sectional elevation taken across the grate, and Fig. 3 a partial plan-section showing the relative arrangement of the bridge-walls.

A designates the boiler, B the grate, and O the ordinary bridge-wall, these parts being constructed and arranged in the ordinary man ner, and requiring no special description, except as hereinafter indicated.

In rear of the bridge-wall C, I place an auxiliary bridge-wall, D, extending from about the level of the ash-pit to within, say, an inch or less of the boiler, around the lower exposed portion of its contour, and between the side walls of the furnace, and in rear of that a wall, G, forming the end wall of the ordinary filling constituting the bottom of the combustion-chamber. The three walls C, D, and G are constructed of refractory fire-brick.

Through the supplemental bridge-wall D, a little below the grate-level, are one or more horizontal apertures, E-usually three for a single boiler-of sufficient size to permit the free passage of the gaseous products of combustion as impelled by blasts of air or steam from a pipe, F, arranged before or in the 4 5 bridge-wall C, and having suitable nozzles projecting toward the axis of the apertures rearward.

The action of the apparatus is as follows: The pipe F being supplied with steam from the boiler, (as indicated by the dotted lines showing a connection with the steam-dome,) or

through the apertures E and against the wall G, which action tends to thoroughly mingle the gases; and, moreover, by impelling them against and between the walls C, D, and G,

which are highly heated, and at the same time withdrawing them from contact with the cooler surfaces of the'boiler, their temperature is highly increased and kept above the point of thorough combustion. 7 Furthermore, the partial vacuum being thus produced in the space forward of the auxiliary bridge-wall D, a portion of the gases cooled by contact with the boiler at the rear of the wall D are drawn forward-through the space cl, between the said wall and the boiler, and carried downward and reheated and discharged again through the apertures E.

The most effective use of my invention is attained in connection with the ordinary damper in the uptake of the boiler, by which a partial pressure may be maintained in the space at the rear of the auxiliary bridge-wall D, tending to promote the thorough combustion of the gases while passing beneath the boiler and back through its flues, and maintain thereby a higher temperature. The arrangement also tends efficiently to prevent the formation of smoke.

I claim as my invention and desire to secure by Letters Patent 1. In a steam boiler furnace, a supple mental bridge-wall, D, in rear of the ordinary bridge-wall, arranged with apertures Ebelow the grate-level, and a space, d, adjacent to the boiler, in combination with a blast-pipe, F, provided with nozzles arranged to discharge rearward through the apertures E, substantially as and for the purpose specified.

2. In a steam-boiler furnace, the ordinary grate and bridge wall, the supplementary extending backward from the top of said Wall,

2 v zeas s bridge-Wall 'D, having apertures, as described, I In testimony whereof I have hereunto set and a space adjacent to the boiler, the Wall G my hand in the presence of two subscribing in rear of wall D, and an inclined surface witnesses.

GRANVILLE T. WOODS. and a series of blast-pipes corresponding with XVitnesses:

the apertures in Wall D, all the elements in L. M. HOSEA,

combination, substantially as set forth. A. HAMILTON.

Images