US341470A - fuller - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1. I

W. M. FULLER.

STEAM GENERATING FURNACE. No. 341,470. Patented May 11, 1886.

Juveflov? Willard dimer NV PETERs, PhnkoLilhugnphet, wnhingmn. D. c.

(No Model.) 3 SheetsSheet 2.

W. M. FULLER.

STEAM GENERATING FURNACE.

No. 341,470. Patented May 11 1886.

fie/ven or.

Willardeilllid'lez' 3 Sheets-Sheet 3.

(No Model.)

W. M. FULLER.

STEAM GENERATING FURNACE.

Patented May 11 UNITED STATES PATENT OFFICE.

\VILLARD M. FULLER, OF NEWV YORK, N. Y., ASSIGNOR OF ONE-HALF TO IVILLIAM A. PILE, OF SAME PLACE.

STEAM-GENERATING FURNACE.

SPECIFICATION forming part of Letters Patent No. 341,470, dated May 11,1886.

Application filed January 8, 18%5. Renewed Oetober14, 1885. Serial No. 179.898. (No model.)

To all whom it may concern:

Be it known that I, WILLARD M. FULLER, a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in SteamGenerating Furnaces, of which the following is a specification.

My invention relates to steam-generating furnaces, and has for its object to provide means for the more perfect consumption of the products of eombustion,such consumption taking place at a point where the increased temperature shall be utilized in the increased heating power of the furnace.

My invention consists in the several novel features of construction and combinations of parts hereinafter fully set forth, and defined in the claims annexed to this specification.

Referring to the drawings forming part of this application, Figure 1 is a cross-section of the furnace, taken through the fire-box. Fig. 2 is a central longitudinal section. Fig. 3 is ahorizontal section taken in the plane 00 a", Fig. 2.

In the said drawings, the reference-numeral 1 denotes the steam-generating boiler, which is, in essential respects, of the usual construc tion. This boiler is housed in suitable masonry, and .is heated by a fire-box, 2, separated by a bridge-wall, 3, from a rear combustion-chamber, 4. The construction and arrangement of these parts does not dilfer substantially from that already known and used.

Upon the bridgewall 3 I place a tank or box, 5, constructed of any material which will withstand extreme heat. This tank is connected witha series of air-pipes, 6, extending from end to end of the rear combustion-chamber, 4. These pipes at their outer ends open into a supply branch, 7, through which air may be supplied to the entire series by means of a blower or other suitable apparatus.

From the tank 5, and communicating with it, a series of pipes, 8, extend over the fire chamber 2, said pipes being preferably of greater diameter and placed at greater intervals apart than the pipes 6. It will be seen that these pipes 8 are arranged at some little distance above the grate 2, and each is supplied with a quantity of perforations, 9, so

arranged that air entering said tubes will be sprayed into the incandescent blast or current of the burning products of combustion rising from the grate and passing over the bridgewall.

Upon the sides of the fire-chamber 2, above the grate, I arrange pipe-coils 10, the lower member of each coi-l being supplied by a pipe, 11, with water from the boiler. The upper member of each coil communicates, by means of a drop-pipe, 12, with a tube, 13, arranged just above the air-pipes 8,and perforated upon the side adjacent to such pipes with openings 14. It will be seen from Figs. 1 and 2 that the water entering said coils is compelled to traverse its entire length before passing into the tubes 13. As each coil is exposed to the direct heat of the furnace, the water is vaporized in traversing said coil, and the steam is superheated when it reaches the tubes 13.

It is of the highest importance in this class of apparatus that the air and steam being sprayed upon the burning fuel in the fire-box shall reach a temperature of about 1,000 Fahrenheit, and for this purpose I employ the extended series of pipes 6, of comparatively small diameter, and laid as closely to each other as is consistent, with a free draft through the rear combustioirchamber. The coils 10 also vaporize the water entering them and superheat the steam before its escape therefrom, and by using these devices I not only avoid any reduction of the heat of the combustionchamber, but obtain far better results than are possible by the use of air and steam at lower temperatures. It is important that the air shall enter the firebox at some little distance above the grate,where it mingles with the burning products of combustion, together with the steam, furnishing sufficient oxygen to eifect the complete consumption of the products of combustion.

This construction is applicable to all furnaces wherein a high degree of heat is re quired.

\Vhat I claim is- 1. In a furnace, the combination, with the combustion-chamber, of an air-tank mounted upon thebridge-wall, a series of pipes extending through the rear combustion-chamber and supplying air to the tank, a series of pipes ing at narrow intervals through the rear con1- extending from the latter over the grate and bustion-chan1ber, 4, a series of larger pipes,

perforated, and pipe-coils arranged upon each 8, placed at Wider intervals over the grate,

side of the combustion-chamber and receivand the coils 10, having their lower members 15 5 ing water from the boiler, the lower member perforated, substantially as described.

of each coil being perforated, substantially as In testimony whereof I aflix my signature in described. presence of two witnesses.

2. I11 a furnace, the combination, with the XVILLARD M. FULLER. fire-chamber 2, having a grate, 2*, of the air- \Vitnesses: to tank 5, mounted on the bridge-wall 3, a series EDWARD E. ,WADLEIG-H,

ofair-supply pipes, 6, of small diameter extend- BENJ. A. SHELDON.

Images