US297162A - Process of generating gas - Google Patents

Description

' (No Model.) 2 Sheets-Sheet};

H. PRATT & J. J. RYAN.

PROCESS OF GENERATING GAS.

No. "297,162. Patented Apr. 22, 1884.

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(No Model.)

2 Sheets-Sheet 2.

H. PRATT & J. J. RYAN.

PROCESS OF GENERATING GAS.

Patented Apr. 22,1884,

INVBNTOR @7 3? ATTORNEY UNITED STATES rrren,

HENRY PRATT AND JOHN J. RYAN, OF CHICAGO, ILLINOIS.

PROCESS OF GENERATING GAS. b

SPECIFICATION forming part of Letters Patent No. 297,162, dated April 22, 1884.

Application filed August 24, 1883.

T0 aZZ whom, it may concern:

Be it known that we, HENRY PRATT and JOHN J. RYAN, citizens of the United States, residing at Chicago, in the county ofGook and State of Illinois, have invented certain new and useful Improvements in Processes of Generating Gas, of which the following is a specification, reference being had therein to the accompanying drawings.

Our invention relates to an improved process of generating gas, as will be fully hereinafter described and claimed.

Reference will be made to the accompanying drawings, in which Figure 1 is an elevation of the apparatus employed,'showing two furnaces provided with suitable connections; Fig. 2, a vertical section of one of such furnaces, and Fig. 8 a view in detail.

Like letters refer to like parts in each view.

A A represent two furnaces, composed of any suitable number of sheet-iron shells, and provided with any suitable lining formed of fire-brick, tile, or the I like. Connection is formed between these furnaces by means of a pipe, B, which opens into each at a point below a perforated arch or fire-grate, O, with which each is provided. As will hereinafter appear, more than two of such furnaces may be employed, or only one, in which latter case the one furnace would be divided into two or more compartments, all having suitable pipesituated below and the other above the firegrate. Formed upon the top of each of the furnaces is a dome, D, covered by a hinged lid, 0, and into each of which is tapped a gasoutlet pipe, E. Tapped into said domes, and at points below the gas-outlets, is a steam or water supply pipe, d, through which water or steam is discharged upon the fire-bed on grate G. On one side of each of the furnaces, and at a point near the top thereof, are formed through the fire-brick lining two ports, f f. Port fis horizontal, and f, which is situated slightly below it, is curved and extends upward, so as to communicate therewith.

(X0 model.)

In the drawings, 9 represents a pipe, which is located in port f, above referred to, said pipe being provided with an opening, -h, and being secured at one end to flange 1 formed upon the end of a pipe, which, as shown,- is of larger diameter than the pipe 9, and protrudes out beyond the shell of the furnace, the fiange i, above referred to, abutting against the outer surface of said shell, and suitably secured, by screws or otherwise, to the shell. Pipe j is provided with a screwthreaded extension, is, into which is tapped a pipe for supplying naphtha or other suitable volatile hydrocarbons.

Situated within pipe j, and extending through the shell of the furnace to a point in pipe 9, is a steam-supply pipe, Z, the outer end of which protrudes beyond the outer end of pipe j, and is screw-threaded to receive the extension of the steam-supply.

F, G, and H represent suitable doors for obtaining access to different parts of the furnace, and m suitable arms for locking the same. The operation is as follows: The grate is supplied with fuel, which is ignited, and air from any suitable blower is forced through the air-openings described until the fire reaches a sufficient degree of heat to decompose the steam to be applied thereto, the gases arising from the fire during this first step passing off through the dome D. The valves in the airsupply pipes are then shut off, the lids of domes D lowered, and the gas-outlet in one furnace closed. Steam or water is then discharged through the pipe (1 upon the fire-bed of the furnace, in which the gas-outlet is closed. As this steam or water is discharged upon the fire-bed the upper part of the fuel superheats it, and its temperature is gradually increased until it reaches the incandescent carbon at the bottom of the bed, when a portion of the steam is decomposed and forms the gasesviz.,carbonic oxide, carbonic acid, and hydrogen. All the water vapors not decomposed in this fire pass with the gases through pipe B to the next furnace, where they are passed through the second fire-bed, where the remaining undecomposed steam is decomposed, and the carbonic acid takes on another atom of carbon and converts the whole into carbonic oxide and hydrogen. If the gas is ICO desired for illuminatingpurposes, steam is injected through pipe Z, and naphtha or other volatile hydrocarbon through pipej, and the gases in the furnace, rising, enter the ports f f, where they commingle with this steam and naphtha, and are discharged again over the fire-bed, when they are formed into a fixed illuminating-gas.

WVe are aware that it is not new in the manufacture of gas to cause partial combustion of carbonaceous materials to generate a heating-gas, then to cause complete combustion of such gas, and to heat to incandescence a second bed of carbonaceousmaterial by ad- I 5 mitting air to the gas in its passage to the and we do not claim any such process; and,

further, we are aware of the existence of Let tcrs Patent Nos. 248,489 and 263,499, issued to one J. Flannery, and disclaim all invention therein described.

Having thus described our invention, what we claim as new therein, and that for which we desire to secure Letters Patent, is

The within-described process of manufacturing gas, which consists in superheating and decomposing steam by passing it down through incandescent or highly-heated fuel, then passing the resulting gases through a second body of heated fuel for converting any contained carbonic acid into carbonic oxide, then drawing the gases into an injector and commingling them withvolatilehydrocarbons, and then discharging themover the fire-bed.

In testimony whereof we affiX our signatures in presence of two witnesses.

HENRY PRATT. JOHN J. RYAN. Vitnesses:

M. J. CLAGELT, ADAM Gno. WHITE.

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