US842189A - Smoke-consuming furnace. - Google Patents

Description

110,342,139. PATENTED JAN. '29, 1907.

.' w. B. ESTES.

SMOKE consume FURNACE.

APPLICATION FILED 00126. 1906.

WITNESSES.-

, [NVENT R I r w THE NORRIS FEI'ERS co, WASHINGTON, n. c.

UNITE STATES PATENT OFFICE.

WILLIAM B. ESTES, OF DANVILLE, ILLINOIS.

SlVlOKE-CONSUMING FURNACE.

Specification of Letters Patent.

Patented Jan. 29, 1907'.

Application filed October 26, 1906. Serial No. 340.661.

To all whom, it may concern:

Be it known that I, W'ILLIAM B. Esrns, a citizen. of the United States, residing at Danville, in the county of Vermilion and State of Illinois, have invented new and useful Improvements in Smoke-Consuming Furnaces,

The invention is illustrated in the accompanying drawings, in which-- Figure 1 is a vertical longitudinal section of a boiler-furnace provided with the invention. Fig. 2 is a vertical cross-section on the line 2 2 of Fig. 1.

Referring specifically to the drawings, 4 indicates the grate, 5 the bridge-wall, 6 the boiler-fines, and 16 the breeching or smokebox at the front end of the boiler, these parts being of the usual or ordinary construction.

For returning the products of combustion from the smoke'box to the combustionchamber I employ pipes which are mainly embedded in the side walls of the furnace. The ends of the pipes are located in the smoke-box. in the form of depending parts 9, which are provided with a series of hoods 8, located at various heights along the same. The purpose ofhaving a series of hoods is to catch the smoke from the various levels or sets of fines. The pipes 9 have openings 9 therein within the hoods, so that the smoke which enters the hood passes through the openings 9* and into the pipes. The vertical parts or pipes 9 are connected at the top by elbows 1.0 to horizontal pipes 11, which extend rearwardly through the brickwork above the boiler and have a series of branches 11 11 and 11, which extend downwardly through the side walls of the boiler-setting. One branch 11 opens, as indicated at 12, into the combustion-chamber above the grate. The others, 11 and 11, open, as indicated at 12 and 12 in the ash-pit under the grate and assist the draft. To increase the draft and also to induce the flow of smoke, through the return-pipes, steam-jet pipes 7 are provided, which enter the mouths or lower ends of the pipes 9 and.

discharge a jet upwardly into said pipes. Steam is supplied through a pipe 7 which taps the boiler and which is controlled by a I valve 7.

To further assist combustion, air-feeding means are provided consisting of thimbles 13, which extend through the side walls of the setting and open into the combustionchamber above the grate. Valves 14 on the outside control the flow'of air through these thimbles. The supply of air to the top of the fire may accordingly be varied without forcing a great draft through the fuel-bed.

The combined effect of the supply of finelydivided carbon in the form of smoke and of hot gases and of steam and air is to greatly assist combustion, resulting in consumption of the smoke and consequent increase of heating capacity and saving of fuel.

I claim In a boiler-furnace, a return-pipe for smoke and gases, having an inlet end depending vertically within the breeching and provided with a series of inlet-openings at various heights opposite the rows of flues in the boiler, a series of hoods above said openings, said pipe extending rearwardly and downwardly to the fire-box, in combination witha steam-jet pipe discharging into the pipe.

In testimony whereof I havesigned my name to this specification in the presence of two subscribing witnesses.

WILLIAM B. ESTES.

Witnesses:

C. M. SwALLow, R. ALLAN STEPHENS.

Images