US1391839A - Heating apparatus - Google Patents

Description

A. L LA FAY.

HEATING APPARATUS.

APPLICATION msn Aue.1s. 1320.

'PatendSept 27, 1921.

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LNvENT-ma. (lyqar i UNITED STATES i AT1a1`uf*OFFICE-.fg

ARTHUR JOSEPHr LA FAY, or ToRoN'ro, oNTAmo. CANADA, AssIGNoR-OF ONE-HALF L To HUGH'Ri-TUDHorE, or o'itILLIA, ONTARIO, CANADA.

HEATING APPARATUS'. i

To all whom t may concern Beit known that I, ARTHUR J. LA FAY,V

of thej city of Toronto, in the county of York, Province of Ontario, Canada, a subject of the King of Great Britain, have invented' certain new and useful Improvements in Heating Apparatus, of which the following is a specification. .Y

The present invention relates to heating apparatus andthe principal object contemplates jthe provision of means for utilizing to a maximum degree, the caloric comprisingI the products of combustion, as an auxiliary to the heat radiatingVV function of the furnace for increasing the efliciency of thek i Same.

A further object of the invention is to provide a heating apparatus, wherein a maX- imum amount of the caloric isderived from a given quantity of fuel for effectively heating a given space.

In general the principle of operation ini y volved in the construction of my improve- Figure 1 is a longitudinal sectional ele-l vation of the'heating apparatus embodying vtaken at the rear of Fig. 3.

ments is to Vlead the hot products of com-k bustion in a stream-moving continuously between an outer casing and the casing of the furnace and then lead them through `a special flue or flues to the smoke pipe.

I attain my object by means of the constructions hereinafter more specifically described and illustrated in the accompanying drawings in which.

my improvements.`

Fig. 2 is a vertical section on line 2-2 of Fig. 1 llooking in the direction of the arings, 1 is afiuid heating furnace of ordinary Y construction with vertical sections, though my invention-is, applicable to furnaces of the 'horizontal sectional type.

-. it will be seen is of the type in which in- Walls of the furnace and .Surrmindng the ternalriues are provided and spacesforthe fluid to be heated externally bounded by the trolled vby the sliding damper 9.

This heater,

Specification ofLetters Patent.` Patented Sept, y27,' 1921, Application filed August 1G, 1920.- i Serial No. 403,974. K i

internal yiues. 2 is the smoke collar or exit' of the furnace. The furnace is surrounded by' an `external casing 3 of metal or some refractory material and preferablyl thearrangement of the external casing is such that the front of the boilery with its doorsisexposed. yThe external casing is preferably rectangular in planand is spaced from the sides and combustion into which a smoke exitA forthe furnace opens.

and 2, a chamber 4 is formed at the rear part of thefurnace and'r is separated-.from the rear .jacket space 5 by a i partition 6. The chamber l is provided with the usual .smoke pipe-7 leading. to` the chimney.v In

the partition 6 is formed an opening 8 con- "In the space between the side walls of the furnace 1 and theexternalcasing 3are located the alternate baiiie plates 10 and 11v ypreferably of metallic construction.'y The plates 1() are of substantially inverted U-configuration and extendy transversely around the greater part of furnace I, the `top or arch portion 12 being secured to the inner surface ofthe top plate 13 of the casing 13.

,The verticalV leg'portions 14 of the baffle rplates 10, have edge engagement with the In the arrangement illustrated in Figs. 1\v

Vtop of the furnace as indicated in Figs. 1. `and 2. Thespacing between the external inner and youter walls of the casing 3 and furnace 1.

The lower kendsii'if the vertical leg portions of the baiiie plates 10 are spacedmfrom the bed l5 vof thefurnace to providea series have their flower ends suitably` connected, to the furnace bed 15. The plates 11, are

portions 19 of whichare connected vto the a-ngularly disposed partition plates 20. The -upper arched portions 19 of the plates` 11 are spaced apart and form flue spaces, 21, butin other respects the'said plates areof the same f configuration as plates 10, and vserve withk paratus.

dismal/Plates ,20 in .the n mannerstated; two

fof openings 161, `17 and 18. Interposed be-j tween plates 10 are the baflie plates 11, which formed in two sections' the. upper arched Resultantof positioning the 'angularly 'i triangular return flues 22 and 23 are formed the function of which will hereinafter be more fully described.

4When the damper 9 is opened, the products of combustion pass upwardly through opening 8 into chamber 4 and out through the chimney pipe 7.

lNhen, however, it is desired to utilize the maximum caloric value of the products of combustion, the damper 9 is adjusted to close the exit opening 8, which action will cause the products of combustionr to be directed into the rear jacketspace` 5, the products of combustion by reason of the closing of the damper space 8, will pass through the rear space 16 between the furnace bed 15 and rearbaflle plate 10 and thence `will circulate upwardly in the space between the rear baiie plates 10 and 11, at each side of the furnace proper. As the upper arched ends 19 of baflie plates 11 are spaced apart at the top of the furnace and form the' spaces 21, the products of combustion will pass through these spaces 21, around the confronting edges of the said plates 11 and downwardly into the spaces between the said plates 10 and the next succeeding baflie plate 10. The last mentioned plate 10 being spaced'f'rom the Vbed provide the openings 17, through which the products of combustion will pass upwardly into the space between theyplates and the next preceding plates 11. Then the products of combustion pass into the space between the arched `ends 19 of the plates 11 and downwardly through the space between the plates 11 andthe plate 10. Upon passing through the. openings 18 at the lower endof the front baffiie plate 10, the products of combustion` pass upwardly intothe return lues 22 and 23, which latter extend the entire length `of the external casing at the top thereof and resultantly the products of co1nbust-ion, deprived of their caloric value, due

to their contact with the outer walls and top of the furnace, will pass Vinto the rear chamber '4 and out through the pipe 7 to the chimney Inthis manner, the products of combustion 1n consequence of the novel arrangey j ment of the baffle plates 10 and 11, are circulated entirely around the sides and top of thefurnace and consequently, the caloric y quantity is utilized to ya very marked degree.

f Byk this construction, the products of combustion. are utilized as .an vauxiliary heating .medium and coperates with the furnaceV in. developing a maximuindegree o f heat .for thegeneration of steam in the coils.

" f and 4, I'inclose the` furnace 24 within'a'metallic external casing 25 of similar con-v In vthe modification illustrated inFigs. 3

struction as that of thepreferred forni, with `the* exception thata chimney outlet collarl26 is arranged onthe top of the casing 25 casing.

baffle plates 35, within the space between` The baffle the furnace and casing 25.

plates 34 are formed `at their upper part with arched shaped end portions 36 which extend partly over the top or crown of the furnace, and are connected to the transverse partition plates 37 and 38. These plates 37 and 38 are vconnected at therear to the partition 28 and the front ends of the partitions 37 and 38, are connected to the front baille plates 34 and are spaced from the front wall of the The baffle plates 34 at their lower ends are spaced from the base of the furnace to provide openings similar to openings 16, 17 and `18 of the preferred form,

whilethe baffle plates 35 havev theiri lower ends suitablyY secured to the furnace base and extend only part way up the sides of the furnace, as illustrated in Fig. 4.

By the provision of the partitions 37 and 38 a central flue 39 is formed which extends from the front of the casingto the'chamber 27 at the rear. Y

When the damper 31 is open theproducts of combustion circula-te upwardly through opening` 30 into chamber 27 and out through the outlet collar 26 to the chimney.

When the damper is closed, the products of combustion pass downwardly fromV the smoke collar 33 into the 'jacket' space 29.

The products of combustion containing the' caloric pass through the spaces between the lower end of the rearnnostv baille plates `34 and furnace bed and then upwardly over the tops of the short baille plates 35. Thence the combustion currents pass downwardly and i "through the opening under the next pre ceding baille platel 34. This circulationis continued toward the front of the 4casing' and furnace, where the products of combustion pass up into thefront passage 410 and*V rrearwardly*through the flue 39 to the chamber 27 'to the outlet collar26.

In this manner,.the products of combustion in its passage through the casing, is,`by

reason of the baffle plates, is forced'to' circu-" late in channels, which bring the same in contact with the walls of the furnace proper.

Y Resultantly the caloric by. contact with the furnace walls, serves as an auxiliary heating means for the same and thus the maximum* heating function of the furnace is accomplished, resulting in the full utilization of the `products of combustion, which otherwise would be lost. M 1

Likewise by the arrangement of dampers eil in the baie plates 1l, as illustrated in dotted lines in Fig. l, the products of combustion will have unobstructed passage through the lower part of the casing and will pass upwardly and out through the top of the casing to the chimney exit.

By this novel construction a great economy of fuel is effected and the waste products of combustion is utilized.

Should it be desired, coils could be placed in the return flues 22 and 28 and the vwater circulating therethrough, will be heated byv the vproducts of combustion passing to the chimney.

The use of water coils in the manner stated, would be more particularly adaptable, where the furnace is of the ordinary hot air type, the interior steam or hot water coils being dispensed with.

That I claim as my invention is l. The combination with a fluid heating furnace of the horizontal type provided with internal iues for the products of combustion and spaces for the fluid to be heated externally bounded by the casing of the furnace, of an external casing spaced from the sidesv and top of the furnace, a smoke outlet at the end of the external casing, depending banp'les dividing the space between the furnace and external casing into a plurality of vertical flues, the upper part of said baffles extending over the top of the furnace casing, a plurality of baflles alternately disposed between the first mentioned bales,

- said last mentioned baffles extending only partly across the top of the furnace casing and forming openings communicating with the flue spaces between the said baille plates, angularly disposed walls extending between the top of the furnace casing and the top of the external casing, the said walls forming triangular shaped return flues communicating with the vertical flues, a chamber opening into the smoke outlet, a jacket adapted for the reception of the products of combustion from the furnace, a. damper controlling the communication between the chamber and jacket, said chamber communicating with the return iiues and smoke outlet, the upper vpart of the lirst mentionedr baffles adapted to direct the products of combustion from `the jacket to the .said return flues and the smoke outlet.

2. The combination with a fluid heating furnace of the horizontal type including internal flues for the products of combustion adapted to receive the products of combustion from the furnace, depending baffles dividing the space between the furnace and external casing, a plurality of vertical flues,

the upper part of said baffles extendingV over the top of the furnace, a plurality of baffles interposed between the rst baffles and having their upper end extending partly across the top of said furnace, angularly disposed walls arranged in the upper end of said casing and forming return flues communicating with the vertical flues at the front of the casing, and said chamber and the upper ends of said baffles being connected to said walls, and said baiies being adapted to direct the products of combustion from the jacket to the return flues.

3. The combination with a fluid heating furnace, of an external casing spaced from the sides and top of the furnace, the space between the rear end of the furnace and casing forming a chamber and jacket, a damper connection between said chamber and jacket, an outlet connection leading from the chamber, said jacket adapted for the reception nace, a plurality of baffle plates arranged in the space between the sides and top of the A casing and the furnace, baille plates disposed alternately between the rst mentioned plates, and forming vertical flues, the second mentioned plates having their upper ends extending only partly over the furnace top, the lower ends of said plates extending to the furnace bed, and the lower ends of the other of said baliie plates being spaced from the vfurnace base, a pair of angularly disposed plates secured to the upper end of said casing and forming triangular shaped flues extending across the top of said casing, the said llues communicating with the forward vertical iues formed at the front of the casing and with the said chamber and the said baffle plates being adapted to direct the products of combustion from the jacket to the return flues and into the said chamber and outlet.

Signed at Toronto, Canada, of August, 1920.

ARTHUR JOSEPH LA FAY,

this 9th day

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