US1897008A - Regenerative heating furnace - Google Patents

Description

Feb. 7, 1933. G. H. ISLEY REGENERATIVE HEATING FURNACE Filed Feb.

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Patented Feb. 7, 1933 UNITED STATES PAIENT OFFICE GEORGE E. ISLEY, OI WORCESTER, MASSACHUSETTS, ASSIGNOR T0 MORGAN. CONSTRUC- TION COMPANY, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF 'MASSAF CEUBETTS BEGENERATIVE HEATING FUBNACE Application filed February 1 1930. Serial 110.425,?04.

The present invention relates to regenerative-heating furnaces, such, for example, as soaking pitand steel heating furnaces, of the general type shown and described In my condin application Serial No. 393,683, filed terrier 19, 1929.

he present invention, as applied by way of example to a gas-fired soaking pit furnace, resides in a novel arrangement of ports and passages, whereby the flame and hot furnace gases are made effective on the artlcles or materials to be heated in a substantially uni- Kai form manner. Other objects and advantages of the invention will be apparent from the following detailed description thereof, taken in connection with the accompanying drawing, in 'which Fig. 1 is a plan view, pa tly diagrammatic, of a regenerative soaking pit construction'in accordance with my invention.

Fig. 2 is a sectional view on the line 2-2 of Fig. 1.

Fig. 3 is a fragmentary sectional view,-

similar to Fig. 2, of a modified form of my invention.

Fig. 4 is a sectional view on the line 4-4 of Fig. 3.

Like reference characters refer to like parts in the different figures.

In the furnace of the soaking pit type shown by Figs. 1 and 2, the heating'chamber which receives the ingots a, a, or other stock to be heated, is constituted bytwo substantially parallel portions 1 and 2 which are separated, as shown in Fig. 1, by a partition 3. The upper portion of chamber 1, as shown in Fig. 2, has a port or passage 4, and the chamber 2 has a similarly located port or passage 5, said ports or passages 4 and 5 establishing communication of their respective chamber portions with air regenerator chambers 6 and 7, respectively. The latter are here shown in substantially parallel arrangement, the same as in my aforesaid copending application, and in communication at their other ends with suitable drafting and reversing means, here shown as the upwardly- opening ducts 8, 8, each of which is adapted to be supplied with upwardlydirected jets of air, as by means of a suitable blower 9. Each duct 8 is equipped with a suitable valve or damper 10,.Fig. 2, and the positions of these dampers determine the direction of gaseous flow through the furnace. That is to say, when the damper 10 associated with regenerator pasage 6 is closed, the air supplied to the duct 8 in question is deflected downwardly, as shown by the full line arrows in Fig. 2, and passes to the furnace by way of said regenerator passage 6. Under these conditions, the other damper 10 associated with regenerator passage 7 is open, so that the air supplied by the blower to the other duct 8 exerts an entraining action on the waste furnace gases to draw them through the regenerator passage 7 for discharge from the upper open end of the duct 8 associated with said passage. To effect reversal of the air supply, it is only necessary to interchange the positions of the two dampers 10, 10, as will be readily understood.

Figs. 1 and 2 show a furnace arranged for the use of producer gas as fuel, and to this end a producer gas supply flue 11 is disposed in transverse relation to the several regenerator passages 6 and 7 of a battery of soaking pits, said supply flue, as best shown in Fig. -2, having a plurality of outlet branches 12, 12, corresponding in number and arrangement to theregenerator passages 6 and 7 Each branch 12 leads from the flue 11 to aport 4 or a port 5, as the case may be, and each branch 12 is controlled, at its juncture with the supply flue 11, by a suitable valve 13. It will thus be seen that for operation of the furnace under the conditions illustrated by the full line arrows in Figs. 1 and 2,

the producer gas which flows by a branch 12 communication between the twochamber portions is bywayof a pair of transverse passages 14, 14 at a much lower level than the ports 4 and 5. Furthermore, thearrangement of the passages 14, 14 is such that the descending gases in chamber portion 1 are made to fan out laterally toward the bottom of said portion 1, because said passages 14, 14, as shown, are in eflect lateral extensions of the chamber portions 1 and 2 that pass around both ends of the intermediate partition 3. Therefore in the chamber portion 2, the furnace gases, entering sidewise near the bottom, are obliged, in seeking an outlet from said chamber portion, to rise almost to the top, which insures that-'the objects a, a in said chamber portion will be thoroughly and through sage 6.

uniformly heated before the s finally pass out through the port 5 to e regenerator passage 7 This same effective heating of the contents of the heating chamber 1, 2 is obtained when the furnace is reversed, in the manner previously described; under these conditions, the flame and furnace gases enter- Y ing near the top of chamber portion 2, by way of port 5, are drawn down and spread out as they pass by the assages 14 14 to the chamber portion 1, and then, entbring the drawn u wardly for ultimate discharge 'In the embodiment of my invention shown" by Figs. 3 and 4, the same general mode of operation prevails; in this case however, the communication between the chamber portions 1' and 2 is by way of rts '15, 15 in the lower part of the separating partition 3', so

that the flame and furnace gases entering by way of port 4 will have the same generally downwardflow in the chamber portion 1', followed by the same generally upward iflow in the chamber portion 2', before discharging through the port 5.;

cla m, 1. A regenerative heating furnace come port 4 into the regenerator pas:

versed, for the inflow of combustion-supporting air, and for the outflow of combustion products,a heating chamber having ports at 1ts upper end communicating horizontally with both of said passages, a partition in said chamber between said ports and extending from the top to the bottom of said chamber, and a horizontal passa e at the bottom of said chamber connecting t e portions thereof on opposite sides of said partition, whereby in 0th directions of the flow through said chamber of flame and hot gases, the latter enter one of said chamber portions horizontally, ass downwardly therein and then horizonta y into the other chamber portion, and finally upwardly in the latter with horizontal discharge therefrom, to envelop completely the charged material in both of said chamber portions.

- GEORGE H. 'ISLEY.

prising a pair of regenerator passages adapt- I ed to serve alternatively, as the furnace is.

reversed, for theinflow of combustion-supporting air, and for the outflow of combus V tionproducts, a heating chamber having orts at its upper endcommunicatin with V th of said passages, and a substanti y vertical partition in said chamber arranged to a blockofi communication betweensaid ports except by way of the extreme lower end of said chamber, whereby in bothdirections of the flow through said chamber of flame and

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