US105558A - Xtosiah w w - Google Patents

Description

J. W. ELLS. GAS AND AIR HEATING APPARATUS FOR METALLURGIG FURNACES. No. 105,558.

Patented July 19, 1870.

I aorta sate atelti AND s. nurse, or SAME PLACE.

LettersPatent No. 105,558, dated July 19,1870; antcdated July 6, 1870.

IM2ROVEMEN'T IN GASA ND AIR-HBATINGAPPARATUS FOR METALLURG-IC FURNACES.

The Schedule referred to in these Letters Patent and making part. of the same To all whom it may concern: i

- Be it known that I, JOSIAH W. Eons, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new-and useful Improvement in Gas and Air heating Apparatus, such as may be applied to furnaces of various kinds,and for various purposes. In this apparatus the gases and air are heated and expanded on theiravay to the plaeedesignatedfor their joint combustion by being directed. through tubes brought tea white heat, by the escaping products of said combustion playing around the outside of them on its way to the chimney. The nature of my invention consists in so arrange ing the gas and air-tubes within the space of the heating-chamber, in combination with air and gas-passages at opposite ends of said chamber, and with a properlyconstrncted and operating damper, as that the gas will be directed through one set of tubes, while. the air passes through the otherset, or vice. versa, at theoption of the furnace man, or the person having it in. charge. i i

Also, so arranging the gas and air-supplying tubes, with their respective passages, at' each end of the heating-chamber, damper-chest, and inlet-ports, that, by changing the position of the damper so as to close one port and open theother, the current of gases, as they pass into the furnace, will be made to enter either above or belowthe current of air, as the circumstances 1 of the case may require.

'Also,in soar-ranging the damper and damper-chest,

with its ports, in corinection'with the inlet, air, and gas-passages, as that a greater portion of the under side of said damper will always beexposed to the cooling influence of the atmosphere, and thereby less liable to become overbeated.- To enable others skilled in the art of furnace build ing, to understand, make, and use myinvention, I will proceed to describe its construction and operation hy reference tothe accompanying .drawing, in which-- Figure 1 represents a front elevation of my improved apparatus, one of the doors. being open, exposing the tubes on that side.

*Figure 2 represents a transverse vertical section of the same, showing both clusters of tubes, damperchest, and damper therein. ii

("Figure 3 represents a longitudinal transverse section of the entire apparatus,jou a "horizontal plane, abovcthe upper range of"tfubes.

v Figure is a transverse vertical section of the rear .gaS and air-passage j and combustion-chamberor fu r-' nace. r r

Figure 5 represents asectiomon ahorizontal'plane, of the 'damperchest. a

Figure 6, vertical transverse section of the same.

All the. drawingsare lettered, and similar letters dcnote like parts in the several views.

'I construct my apparatus by making a long, close, covered chamber, A, across which extend two partitions, 13 and B'Q-leaving a space bet-ween'them and tbeoutside'avalls, each of which is divided by a middle wall, 0' and 0, so as toforl'n, at both ends'of said chamber, a gasand' air-passage.

The passages, J J", at the front end are open to the atmospliere,-wliile those, K K, at the rear or opposite end of the chamber A lead,.-by suitable channels, E E", one above the other, into the furnace F.

Through the body of the chamber A andtransverse partitions ]3-B, so that the'front air passages J J" shall communicate-with those, K'K", at the opposite end of the chamber, is placed a series of highly refractory or heat-sustaining tubes',-H M.

.Just above the air and gas-passages J J, at the front end of the chamber A, is placed damper-chest, S, through the bottom-of which are two openings or ports, T'T, each leading downward intothe gas and air-passage immediately beneath.

7 Inside of this chest S is a' sliding gas-valve or damper, V, large enough to cover one port, and is provided with a handle, an, that protrudes through the outside wall, by which it may be shifted or moved so as-to close (gr-open either port. I a

Fonjthe entrance of the gases, the damper chest S is furnished with an 1nlet-pipe, .W, so arranged'as to convey the gases into it directly above the valve V,

- but it may be' contrived to enter them at any other convenient point. i I

The inflammable gasesavhich are U0 be used may be generated by the slow combustion of carbonaceous fuel' in an' apparatus constructed for that purpose. .These gases, however generated, are conveyed into the ,-darnper-ehestS through the pipe I, and, ii'theoper- .ations of the furnace require-that these gases shall enter it below the air-current, the door, I), of the passage-way'J on that side-of the chainber is to be -closed, and the damper Vjshifted so 'as to open the port, T, leading into that passage-way, which operation or movement of 'the damper shuts the port, T, of the adjoining passageway J, the door D of which is 'ihin to'be opened. The gases will nowldescend.

through the open port, into the passage-way in corn munication with the dampeuchest' S, and pass through the tubes M-into thep assage-way, at the rear end of said tubes, and from thence, by a continuation of .thispassage-way or channel E", direct into the furnace =1. Theair, entering the open doorl), will pass "inrlike"mannerthrough the tubcs,'-H', at that-side of thechambcr A into its passage-way, K, attire opposite end, and through .a channel, E, into the furnace above the gas-current, where-the -tWIO currents will 1 unite, and are to be fired. 1

The heated volatile products, or spent gases resulting from the combustion of the said currents of gas and gas-.

andlair, will flows'out of the furnace F, and into and tubes H M, will eventually enter and escape by the chimney P.

Should the tubes M, through which the inflamma ble gases are supposed to be passing, become choked by a deposit of soot or other foims of carbonaceous matter requiring a supply of oxygen or 'air to assist in burning it out, or should it be desirable to have the current of air, as it enters the furnace, pass under the current of .gas instead of over it, then, and in that case, thedoor I), open for the admission of air, is to be closed, and the valve or damper V changed or moved from the'port, T, it previously covered, so as to open that, and close the other port, T. The gases will, by this means, he cut off from those tubes they formerly passed through, and be directed into and through those before used as air-supplying tubes, and, its channels into the furnace.' Now, on opening the door, D, of that passage-way, J formerly occupied by the ingoing gases, air will be admitted to those tubes and passages, which, by coming in contact with the carbonaceous matter deposited therein, such is the afiinity of oxy gen for carbon at a highheat that it is soon burned out, leaving the tubes as clear as before, while the current of air, as it enters the furnace F, will pass under the current of gas, and both objects be efiectuated,

The air, as it enters the open passage-way, operates against the under side of the damper V, and keeps it comparatively cool. I

Havingstated the nature of my invention,

v I'claim- I I 1. Arranging the gas and air-supplying tubes in such a manner, and in combination with the airand gaspassages at opposite ends of a heating-chamber,

that, with a properly-constructed and operating valve or damper, the gas will be directed through one set of tubes, while the air is passing through the other set, or nice, warm, at the'optiou of the furnace-man, or the person having its in charge, substantially in the man-- ner and for the purposes herein set forth.

2. So arranging the gas and air-supplying tubes, with their respective passages, at each end of the heatingchamber, damper-chest, and inlet-ports, that, by changing the position of the damper so as to close one port and open the other, the current'of gases, as they pass into the furnace, will be made to enter either above or below the current ofingoing air, as the circumstances

Images