US767924A - Steam-boiler. - Google Patents

Description

No. 767,924. PATENTED AUG. 16, 1904. F. BURGER & H. M. WILLIAMS.

STEAM BOILER.

APPLICATION FILED DEC. 26, 1902.

N0 MODEL. 2 SHEETS-SHEET 1.

No. 767,924. PATENTED AUG. 16, 1904. I. BURGER & H. M. WILLIAMS.

STEAM BOILER.

APPLICATION FILED DEC. 26, 1902.

' UNITED STATES;

Patented August 16, 1904.

PATENT OFFICE.

FRANZ BURGER AND HENRY M. WILLIAMS, OF FORT WAYNE, INDIANA;

SAID BURGER ASSIGNOR OF ONE-HALF OF HIS RIGHT TO SAID VVIL- LIAMS.

STEAIVI 'BOILER.

SPECIFICATION forming part of Letters Patent No. 767,924, dated August 16, 1904.

Application filed December 26, 1902. Serial No. 136,719. (No model.)

To all whom, it may concern.-

Be it known that we, FRANZ BURGER and HENRY M. WILLIAMS, citizens of the United States, residing at Fort Wayne, in the county of Allen and State'of Indiana, have invented certain new and useful Improvements in Steam-Boilers, of which the following is a specification.

This invention relates to steam-boilers; and the object of the invention is to utilize the products of combustion for heating the feedwater and superheating the steam in addition to heating the water in the boiler.

The invention will be fully described hereinafter, reference being had to the accompanying drawings, in which Figure 1 is a vertical transverse section of a boiler and furnace embodying our invention. Fig. 2 is a side elevation, partly in section and partly broken away. Fig. 3 is an end view of the boiler and a sectional'view of the water-jacket, particularly intended to show the construction of the water-jacket and the manner of connecting it to or removing it from the boiler.

The boiler consists of two outer semicylindrical shells A and B, connected together at their longitudinal edges by channel-irons O in any suitable manner, and two similar but smaller shells a and Z), connected together at their longitudinal edges by channel-irons c, and the space between these inner and outer shells forms the steam and water spaces of the boiler, and the space inclosed by the inner shells forms the fire-box or furnace of the boiler. The lower portions of the inner and outer shells are cut away to form a longitudinal slot, in which are placed grate-bars (Z for supporting fuel. An opening is cut in the top of the outer shell A to afford communication with the usual steam-dome L.

In the construction illustrated the furnace extends substantially the whole length of the boiler, and any means may be employed to furnish fuel to the furnace. Thus, as shown, there is a tube p on each side of the boiler in which a screw conveyer q rotates to move fuel along said tube from a source of supply,

(not shown,) and from the tubes 2 a series of downwardly inclined tubes 8 lead through the shells of a water-jacket and the shells of the boiler to discharge into the furnace at intervals in its length, thimbles 7 and 7 being secured in the shells of the jacket and boiler, respectively, through which the tubes 8 pass. The special fuel-feeding mechanism, however, forms no part of our present invention; nor is the latter dependent upon any special means for feeding fuel to the furnace.

P indicates a Water-jacket surrounding the boiler to leave a space 8 between them. This water-jacket may be constructed in various ways; but preferably it is made in two halves, adapted to be secured together longitudinally of the boiler. Each half is preferably made of two sections. each formed of an outer curved plate 1 and an inner curved plate 2, connected to each other by channel-irons 5, which may be riveted or otherwise secured to the plates. An L-shaped distance-piece 3 is fitted between the plates 1 and 2 of the upper sections at their upper ends, and these distance-pieces are provided with holes for the passage of bolts 11, by means of which the two halves are secured together at their upper edges. Distance-pieces 4 are fitted between the plates 1 and 2 of the lower sections, each piece having a series of threaded studs 12, which extend through openings in downwardly-projecting plates 6, secured to the boiler, and nuts on the studs will securely clamp the lower ends of the lower sections to the boiler. Each half of the waterjacket is divided into two chambers by channel-irons 9, and the two upper chambers are connected by a pipe detachably secured to the chambers, the points of connection being indicated by 18 and 19 in Fig. 3. A water-supply pipe 17 will deliver water under pressure to one of the chambers 10, and it will flow through said connecting-pipe to the other chamber 10. Each chamber 10 is connected to the lower chamber 10 of its half of the water- .jacket by a pipe 20, having an upwardly-closportion of the water-space of the boiler by one or more pipes 22.

As before stated, one of the objects of our invention is to heat the feed-water, and to accomplish this in the most effectual manner it is desirable to subject as much as possible of the surface of the water-j acket to the action of the products of combustion, and in the present case we provide means for causing all the hot gases from the furnace to pass into the spaces 8 at their lower ends and then pass upwardly in contact with the inner surface of the waterjacket to the smoke-outlet, which in the present instance is located about midway the length of the boiler, as indicated by K. Various means may be devised for carryingout this feature of our invention; but preferably we provide a series of passages Gr, leading from near the bottom of the furnace to the spaces 8, and as there is no other exit for the products of combustion from the furnace they must all escape through these passages up over themner surface of the water-jacket and the outer surface of the boiler to the restricted outlet K, and most of their heat will be imparted to the water in the jacket and boiler. In order to insure passage of the products of combustion through the passages G, two guard-walls H are provided, one on eachside of the grate area, which extend above the openings to the passages G and effectually prevent the fuel from choking up the passages and also insure that the products of combustion will not pass directly into the passages G, and they will take the general course indicated by the arrows in Fig. 1. To still further increase the heating effect upon the water in the boiler, we provide a series of horizontal tubes R, extending across the furnace at the junction of the upper and lower shells of the boiler, and these tubes also serve as a protection for stay-rodsl3, which extend through them and the shells of the boiler and water-jacket and assist in holding the several parts together, washers, nuts, and screw-plugs being employed where necessary to insure tight joints. Thus at the junction of the upper and lower sections of the waterjackets a series of thimbles 13 are secured in the channel-irons 5 opposite the tubes R,which latter are expanded into the channel-ironsc and communicate at each end with the waterspace of the boiler. A series of tubular screwplugs a" are screwed into the channel-iron C opposite the tubes R, and the rods 13 extend through the thimbles 6, plugs 00, and the tubes R. Washers 16 close the outer ends of the thimbles 6, and nuts 11 on the ends of the rod bear against these washers. Washers 14: surround the rods 13' and bear against the plugs :11; and are clamped in place by nuts 15. By removing the nuts from the bolts 11, threaded studs 12, and from the ends of the rods 13 either or both halves of the water-jacket can be removed from the boiler, it being understood, of course, that the fuel-feeding devices will have been removed and pipes 22 and pipe connection between the chambers 10 disconnected.

Means for superheating the steam are also provided, consisting of two headers 26, one at each end of the space 8, which are connected to each other by a series of longitudinally-extending tubes 25, arranged in the space 8 on each side of the dome L. One of the headers 26 is connected by a pipe 51 to the steam-dome, and the other header has a pipe 52 leading from it to convey the superheated steam to an engine. from the dome to one'of the headers 26, thence through the tubes 25 to the other header, and as the products of combustion circulate around the headers and pipes the steam will be superheated.

Any suitable means may be provided for fur nishing draft to the furnace, and in the present case we have illustrated two longitudinally-extending pipes 53 and 5 1, connected by a series of transverse pipes 55 below the gratebars, each pipe 55 having a series of upwardlydischarging nipples 56. Air under pressure will be supplied to the pipes 53 and 54L and be discharged through the nipples 56 through the grate into the fuel.

Obviously some features of our invention may be used without others, and the structural details and arrangement of the parts may be varied without departing from the spirit of our invention.

Therefore without limiting ourselves to the precise details of construction illustrated and described,we claim 1. The combination with a boiler, and its furnace, of a two-part water-jacket inclosing the same to leave a space'between the jacket and the boiler, connections between the interior of the water-jacket and the boiler, and means for introducing the products of combustion from the furnace to the lower portion of the space between the boiler and jacket and for discharging them from the upper portion of the space, substantially as set forth.

2. The combination with a boiler, and its furnace, of a two-part water-jacket inclosing the same to leave a space between the jacket and the boiler, connections between the interior of the water-jacket and the boiler, and means for introducing the products of combustion from the furnace to the lower portion of the space between the boiler and jacket and for discharging them through a restricted outlet at the upper portion of the space, substantially as set forth.

(Not shown.) The steam will pass IIO 3. The combination of a furnace,a boiler innace being closed against exit of the products of combustion except through said passages, substantially as set forth.

4. The combination of a furnace, a boiler inclosing the furnace, a water-jacket inclosing the boiler with a space between them, connections between the waterjacket and boiler, means for feeding water to the jacket,passages leading from the lower portion of the furnace to the lower portion of the space for the passage of the products of combustion, from the furnace to said space, a restricted outlet at the upper portion of said space, and guard-walls between the grate area of the furnace and said passages and extending above said passages, substantially as set forth.

5. The combination of a furnace, a boiler inclosing the furnace,tubes R extending across the furnace and communicating at each end with the water-space of the boiler, a waterjacket inclosing the boiler with a space between them, means for introducing the products of combustion from the furnace to said space, and stay-rods extending through the jacklet, boiler and tubes R, substantially as set fort 1.

6. The combination with a boiler and its furnace, of a water-jacket inclosing the same to leave a space between the jacket and the boiler, said jacket being divided to form upper and lower chambers, meansfor feeding water to the upper chamber, an upwardlyclosing check-valve between the upper and lower chamber, connections between the lower cham ber and the boiler, and means for introducing the products of combustion from the furnace to the said space to heat the water in said jacket, substantially as set forth.

7. The combination with a boiler and its furnace of a water-jacket inclosing the same to leave aspace between them, said jacket being formed of two vertically-separable parts, and means for detachably securing said parts to each other and to the boiler, substantially as set forth.

In testimony whereof we have signed our names to this specification in the presence of two subscribing Witnesses.

FRANZ BURGER. HENRY M. WILLIAMS.

Witnesses:

GEO. D. CRANE, O. ERVIN.

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