US1453116A - Annealing furnace or leer - Google Patents

Description

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WW.` O. MMSLIEIR ANNEALING FURNACE OR LEER Filed May 2l, 1920 2 Sheets-Sham: 2

'WAliIER 1U.` SLER, 0F PTTSBURGH, PENNSYLW.

ANNELING JFURNAJCE UR MEER.

application inea nay ai,

To all whom it may concern:

Be it known that li, WALTER U. Arianne, a citizenof the United States, residing atr Pittsburgh, intheV county of Allegheny and ti State of Pennsylvania, have invented certain new and useful Improvements in Annealing Furnaces or Leers, of which the following isa specification.

'llhe present invention relates to annealing i w furnaces or leers of the continuous type, and

particularly to glass leers in which a furnace of great length is employed, as distinguishedfrom annealing furnaces having a short fire box or'heating chamber. lin' a companion application Serial No. 264,491, filed November 29, 1918, ll have shown and described an annealing furnace of the type to which the present invention relates, and have incorporated in this application many of thevfea.- 2@ tures shown inthe said companion case.

`ftimong'the objects of my invent-ion are, to providea furnace and a tunnel incommunication therewith of great length, in combination with a plurality of overhead in-` dependent combustion chambers; means for passing products of combustion and heating gases into the tunnel structure for the purpose o-f heating the entrance of the ytunnel and its forward endv for a considerable distance; means for passing the products of combustin, etc., into the .tunnel structure and returning them to the chimney; and new and improved means for effecting a desire-d temperature control throughout the length lof the annealing chamber and the tunnel.

lfn the acompanying drawings, which illustrate an application of my invention,l p Figs. 4land 2 arelongitudinal sectional views showing respectively the annealing furnace construction and rthe tunnel construction embodying my invention;

lFig. 3, a horizontal sectional view showing one-half of the furnace construction and one-half of a portion of the tunnel construction; and A lig. 4, a vertical sectional View taken on line 4-4 of lFig.` 1. A Referrin@r to the drawings, 2 designates the side wah-lis ofthe furnace, 3 and 4 front and rear walls, and`5 the arched top. These A elements are of the usual briclrwork conchamber.

1920. Serial No. 3%;256.

struction, and are disposed on a suitable foundation 6. The furnace illustrated is of the continuous type, and communicates at one end through an opening Z in the rear wall 4 with a tunnel 8.

lftwill be noted that ll employ a furnace of considerably more length than the usual and well known furnaces of the class to whlch my invention relates, and that lf also provide a mutiie or an annealing chamber of great length, whereby li am enabled, in conjunction'with the combination and arrangement of parts hereinafter described, to effect a highly efficient temperature control, thereby making it possible for the material to titl' be treated under very favorable conditions. l

The mufiie or annealing chamber 9 has its side walls constructed of tiles 10 and blocks or tiles 11, its archy of tiles 12, and its bottom or floor :of tiles 13. Forming the side walls of `two ties, that is to say, the side wall tile proper 10 and the skewtile or block 11, and resting the arch on the skew blocks, as shown, provides a highly satisfactory construction, preventing cracks developing in the tiles, and preventing products o f combustion from entering the muffle. its illustrated and as preferred, I employ two combustion chambers 14 and 15, said chambers being located between the top of the annealing chamber and the under side 0f the roof of the furnace. 16 and 17 designate laterally extendingpartition walls separating the combustion chambers, and 18 designates a. similar wall located adjacent the chimney 19., As shown, lf provide two burner .structures 20 for each combustion ll find that by "providing two` or more burners foreach combustion chamber, lf amenabled to better control the tem.- perature within the annealing chamber,

lfnterposed between 'the side walls of the annealing chamber and the side walls of the furnace, li provide a series of vertically eX- tending Hues 21 designed for passing products of combustion and gases from thel combustion chambers down into fiues located under the, floor 13 of t-he annealing chamber. Similar flues are also provided for connecting the space or compartment 22 disposed beyond the combustion chambers, thus permitting the passage of gases from the flues and thence downwardly therefrom into the .said flues located below the floor of the annealing chamber.

23 designates a. laterally extending partition wall disposed under the ioor 13 and designed to cause the products of combustion and heating gases to be passed upwardly from ,the said under flues to the chamber 22. Y v

The side flues 21 are' provided with dampers 24 adapted to be operated from the outside of the furnace. By means of these dampers, it will, of course, be evident that I can control the passage of products of combustion through the side flues 21, and consequently, conveniently regulate the temperature within the annealing chamber.

The construction and arrangement of the flues. below the floor 13 of the annealing chamber and the bottom or 'floor 13"1 of the furnace, which flues connect with the side flues 21, vary somewhat, the arrangement and construction of the said flues being particularly shown by Fig. 3. As shown therein, I provide a plurality of longitudinally extending 'flues 25 extending from the front of the furnace to the ylaterally extending partition wall 23. Under the forward portion of the annealing chamber it is desirable to pass the products of combustion and heating gases directly to,` the center ofthe bottom of the annealing chamber, and I have therefore provided laterally extendin flues 26, said flues connecting with the longltudinally extending flues 25.

Under the second combustion. chamber,

instead of passing the ases directly to the middle of the under si e ofthe annealing chamber, the gases are passed laterally through short flues 27 and then backwardly by means of the flues 28, the latter communicating with the longitudinal-ly extending flues 25.

The arrangement of the flues under the rear portion of chamber 22 is similar to the lue construction under the first combustion chamber. FThat is to say, I employ laterally extending flues 29 whereby the heating gases are directed outwardlyinto longitudinally extending flues 25. i

The longitudinally extending lines 25a extend beyond the chimney 19 and into the front portion of the tunnel 8, and Afor this purpose, the lfloor 13 as well as floor or bottom 13*L is carried for a considerable distance into the tunnel structure. By mean-s of the flue construction just described, I cause the heating gases to travel for a considerable distance within the tunnel structure. Said gases travel under the to the chimney by means of flues or passages 31. While the longitudinally extending flues 25' and 25a are separated by the'wall 23, they are in effect tunnel up to the wall 30 and are then returned ber, longitudinally continuous flues for coveying the products of combustion and the heating gases back through the furnace and into the tunnel.

The ware or materials to be annealed are vpassed through the annealing chamber and the tunnel by means of a conveyor 32, said conveyor, as illustrated, being mounted on drive wheels 33 and 34 respectively located Vat the end of the tunnel and atV the forward end of the annealing chamberor furnace.

35 designates a motor for driving the conveyor and as shown the motor is connected with the drive wheel 33 by means of a drive chain 36.

While I have shown the chimney. located between the tunnel and the furnace proper, it will be evident that the chimney may be otherwise located so long as means are provided for,passing the heating gases into or under the tunnel, and conveying the said gases from the tunnel structure to the chimney.

It will be understood that the products of combustion and the heating gases, after their -travel under the annealing chamber will, owing to the wall 23, be caused to pass upwardly into chamber or compartment 22, and from said chamber downwardly into the longitudinally extending flues by which they are conveyed to the tunnel.

What I claim is:

1. In an annealing furnace or leer, an annealing chamber, a tunnel in communication therewith, a combustion chamber at the exterior of the annealing chamber, a longitudinally extending vflue in communication with the combustion chamber and arranged to convey gases therefrom, said flue extending along the forward end of the tunnel for heating lit.

2. In an annealing furnace or leer, an annealing chamber, a'tunnel in communication from and extending along the forward end of the tunnel for conveying heating gases thereto.

In 'an annealing furnace or leer, an annealing chamber, a tunnel in communication therewith, a combustion chamber, and flues in communication with the combustion chamber, through passages at the exterior of the` annealing' chamber and extending along the outside of the tunnel for heating the forward end of the tunnel.

4. In an annealing furnace or leer, an annealing chamber, a combustion chamber located over the top of the annealing chamextending flues under the annealing chamber, side flues about the exterior of the annealing chamber Aconnecting the combustion chamber with the longitudi- 1,11ea11e nally extending dues, and a tunnel in communication with the annealing chamber, said longitudinally extending dues extending along a portion of the tunnel for heating it.

5. ln an annealing furnace or leer, an

annealing chamber, a tunnel in communication with the'annealing chamber, a chimney disposed between the annealing chamber and tunnel, longitudinally extending heating flues disposed below the annealing chamber and extending beyond the chimney and under the tunnel, and a passage at the side ofthe longitudinally extending flue communicating with the rear end thereof for conveying gases back to the chimney.

6. ln an annealing furnace or leer, an annealing chamber, a tunnel` in communication with the annealing chamber, a chimney disposed between the annealing cham-y ber and tunnel, and longitudinally extending heating flues disposed below the annealing chamber and extending beyond the -chimney and-into the tunnel structure and exteriorly of the tunnel, -said flues having connections with the chimney and arranged to produce a flow of gases from the tunnel back to the chimney.

7. ln an annealing furnace or leer, an annealing chamber, a tunnel in communication with the annealing chamber, a chimney disposed between the annealing chamber and the tunnel, a combustion chamber disposed over the top of the annealing chamber, vertically extending side flues, and longitudinally extending heating flues disposed below the annealing chamber and extending beyond the chimney and into the tunnel structure.,

8. lnan' annealing furnace or, leer of the continuous type, ank annealin chamber, a tunnel incommunication wit the annealing chamber, a chimney disposed between the annealing chamber and tunnel, a pluralyity of combustion chambers disposed over the top of the annealing chamber, vertically extending side and longitudinally extending bottom heating dues, said Vlongitudinally extending heating ,dues extending beyond the chimney and along the forwardl end of the tunnel.

9. An annealing furnace Vor leer comprising an annealing chamber, a tunnel forming an extension of the annealing chamber, a combustion chamber at the exterior of the annealing chamber, flues surrounding the annealing chamber and communicating with the combustion chamber for "circulating side of the tunnel-for heating the forwardV end of the tunnel.

l0. An annealing furnace or leer comprising an annealing chamber, a tunnel forming an extension of the annealing chamber, a combustion chamber at the" exterior of a portion of the annealing chamber, flues'communicating with the combustion chamber and arranged to pass the heated gases around the top, bottom and sides of the annealing chamber, said flues extending rearwardly under the forward end of the tunnel, whereby the forward portion of the tunnel is heated by the partially cooled gases.

ll. An annealing furnace or leer comprising an annealing chamber, a tunnel forming an extension of the annealing chamber, a combustion chamber at the exterior of the forward end of the annealing chamber, a second combustion chamber at the exterior of the annealing chamber and disposed rearwardly of the first combustion chamber, a main flue common to both combustion chambers which communicates therewith through ues passing around the annealing chamber, said main flue being arranged to circulate the heated gases of combustion around and under the remaining portion of `the annealing lchamber and extendin rearwardly outsideithe forward end of t e tunnel, whereby the forward end of the tunnel is heated by the partially cooled gases.

l2. An annealing furnace or leer comprising an annealingchamber, a tunnel extending rearwardly from the annealing chamber, a combustion chamber at the top of the forward Iend of the annealing chamber and `will travel around the bottom, top and sides of the annealing chamber and under the forward end of the tunnel. i ln testimony whereof l affix my signature 1n presence o two witnesses.

llitnesses d. M, GnoeHEeAN, liois Winni/ran.

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