US187170A - Improvement in furnaces for steam-boilers - Google Patents

Description

I 2'Sheets-Sheet1. 11,2. PARSON. FURNACES FOR STEAM-BOILERS.

Patented Feb. 6,1877.

VENUE y Milli" if Ill! ill n I 1 ni uni WITNESSES N. PETERS, FHOTD-LITHOGRAPHER, WASHINGTONv D O.

2 Sheets-sheaf 2.

I H.'E.PARSON. FURNACES FOR STEAM-BOILERS.

Patented Feb. 6, 1877.

INVENTOR WITNESSES N. FETERfi. FHOTO-UTHGGRAFHEH. WASNINGTOM, D C.

UNITED STATES PATENT OFFICE.

HENRY E. PARSON, OF WA TERTOWN, NEW YORK.

IMPROVEMENT IN FURNACES FOR STEAM-BOILERS.

. Specification forming part of Letters Patent No. 187,170, dated February 6, 1877 application filed February 29. 1876. i

To all whom it may concern Be it known that I, HENRY E. PARSON, of Watertown, in the county of Jefferson and State of New York, have invented certain new and useful Improvements in Furnaces for SteamBoiIers, of which the following is a specification I have found by experiment that when coal is heated in a retort it yields volatile hydrocarbons amounting from twenty to thirty-two per cent. of its weight, and the hydrogen robs the fuel of six times its own weight of carbon. When fresh fuel is added to live coal in the furnace the same result ensues, so that in using coal fifty to sixty-seven per cent. of carbon burns on the grate, and twenty to thirty-two per cent. of carbon and hydrogen have to be burned in the open space above the fuel or escape unconsumed.

To consume the smoke and gases, as above described, contained in the upper part of the chamber, is a very important and desirable result to attain. This result I accomplish in my invention by peculiar means, adapted to throw into the upper chamber or open space in the furnace, above the fuel, (under, pressure,) 2. sufficient amount of air oroxygen, in combination with the hydrogen of steam to produce perfect combustion.

This apparatus is under absolute control of the engineer, and therefore the amount of air and steam, as required, can be increased or diminished at will by use of a steam-blower.

The air is heated, and therefore produces, I

which blower, front nozzles, and steam-pipe are attached to the furnace, the arrows in the fire-chamber showing the direction of the blast as given by the peculiar construction of the nozzles. Fig. 2 is a longitudinal section of a boiler and furnace, showing the blower attached and deflectors in the chamber, the ar-. rows in the chamber indicating the direction of the air-currents as forced into the chamber for producing a rotary movement to the currents of heat. Fig. 3 is a longitudinal section of the blower, showing the separate passages for steam and air, also the chamber in pipe, into which the steam and air combine, and from' which they are delivered, through the nozzles, to the furnace chamber. Fig.4. is a top view of one of the nozzles. Fig. 5 is a longitudinal vertical section of one of the nozzles on the line 5 5, Fig. 4.

B is my improved blower attached to the front part of the furnace under the door J of the fire-chamber D. The blower B is constructed with a flaring mouth-piece, I, an airchamber, 0, and expanding blast-pipe F. To the end of the blast-pipe F is attached a pipe, F, connecting the blower with a pipe, F, extending upwardly into the fire-chamber and downwardly under and to the rear of the grate blast horizontally over the fuel, causing it to mingle with the blast proceeding from the front nozzle A. At the rear side of the chamber O of the blower is inserted a pipe, E, connecting, by means of a pipe, H, with the steambox. valve, G.

The operation is as follows: Steam, being admitted to the pipe E, passes through chamber O, thence into the expandingpipe F, where it combines with the air as it is brought in through the flaring mouth-piece I. The steam passing through chamber 0 with great velocity, and expanding in pipe F, exhausts the air in chamber 0, and a fresh current of air rushes in to supply the vacant space.

The blower is operated by opening valve G in steam-pipe H, which connects with pipe E of the blower. After combination, the steam The steam-pipe H is provided with a and air are forced through pipes F and F to the nozzles A and A, into chamber D. It is here distributed, as represented by the arrows in Figs. 1 and 2, from nozzles A and A. By dividing the blast and carrying a part in front and a part to the back of the fuel, a still more perfect combustion is obtained than simply with the front blast. The portion of the blastpipe under the fire-chamber being contiguous to the grate, the air passing therethrough will be additionally heated. The blast passing out of the rear nozzle produces a suction through the grate-bars, and, in combination with the blast from the front nozzle, compels the return of 'all unconsumed gases and smoke, forcing them to pass over the heated coal or flame, whereby they are all consumed in the fire-chamber.

These nozzles, combined in this way and made of the peculiar shape described, and operating at certain angles with respect to each other, give a complete rotary movement to the products of combustion, and compels these products to remain longer in the fire-chamber and to become thoroughly exhausted.

By this device great power and complete control of the fire are obtained.

The blower may also be used as a blast for blacksmiths forges and for smelting-cupolas.

This device willbe found to possess the adand located in front of the fuel, to adapt it to draw the products of combustion toward the upwardly-ascending blast, substantially as and in the manner set forth.

, 2. The combination, with the blower B, consistin g of steam-pipe H and flaring mouth-piece I of the pipe F, and flattened flaring nozzles A A, the nozzle A located in front of the fuel, and adapted to direct a blast upwardly, and the nozzle A located at the rear of the fuel and adapted to direct a blast horizontally over the fuel, causing it to mingle and. pass upwardly with that proceeding from the nozzle A, substantially as described, for the purpose set forth.

HENRY E. PARSON.

Witnesses: L. H. AINSWORTH, GEo. V. NATHEY.

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