US1688394A

US1688394A - Sheet and pair heating furnace

Info

Publication number: US1688394A
Application number: US55931A
Authority: US
Inventors: Manker Forrest William
Original assignee: Surface Comb Company Inc
Current assignee: Surface Combustion Corp
Priority date: 1925-09-12
Filing date: 1925-09-12
Publication date: 1928-10-23
Anticipated expiration: 1945-10-23

Description

F. w. MANKER SHEET AND PAIR HEATING FURNACE Filed sept. 12, 1925 4 sheets-sheet` 1 LH.. h.- WHT# Uct. 23, 1928.

F. W. MANKER SHEET AND PAIR HEATING FURNACE Filed Sept. l2, 1925 4 Sheets-Sheet ETT v om tx 1 4N an mM 3W E HUM Q. n 7 O LH. QL.. wo a@ 3 Oct. 23, 1928.

F. w. MANKER SHEET AND PAIR HEATING FURNACE Filed Sept. l2, 1925 4 Sheets-Sheet vwen to@ EW MAA/HER Oct. 23, 1928. 1,688,394

F. w. MANKER SHEET AND PAIR HEATING FURNACE Filed Sept. 12, 1925 4 Sheets-Sheet 4 neath the chamber Patented Oct. 23,v 1928.

UNITED STATE-s PATENT OFFICE.

FORREST WILLIAM MANKER, OF JACKSON HEIGHTS, NEW YORK, ASSIGNOR TO THE SURFACE COMBUSTION COMPANY, INC., OF TOLEDO, OHIO, A CORPORATION OF. NEW

YORK.

SHEET ANIO PAIR HEATING FURNACE.

Application med september 12, 1925. serial'No 55,931.

This invention relatesto improvements in furnaces andmore particularly to a combined sheet and pair furnace.

It is an object of the invention to provide a combined sheet and pair furnace wherein the sheet and pair heating chambers may be eficiently heated by-gas generated in coal-fired producers forming part of the furnace construction.

Another object is to provide a sheet and pair furnace so constructed that preheated air may be utilized'to support secondary oo mbustion of the gases entering the respectlve heating chambers from the producers.

A further Vobject is t0 provide means in connection with the recuperators associated with the sheet and pair heating chambers which will permit air heated by one of the recuperators to be diverted into the channel through which the air heated by one of the recuperators normally flows on its way to be mixed with the gas produced by one of the producers.

An additional object is so toconstruct thev furnace that the products of combustion leaving the sheet heatin chamber may pass beoor and thus be caused to give up some of its' heat to the Hoor in passing thereunder.

A still further object is to provide means whereby the gases generated by one of the producers may be diverted `into the channel through which the gases generated in one producer normally How on their way tothe heating chamber with which said producer is primarily associated.

The above and other objects of the invention will appear from the detailed description taken in connection with the accompanyingdr'awings forming part ofthe specification.

Referring to the` drawings:

Fig. 1 is a horizontal section taken through the improved sheet and pair furnace embodying the preferred form of the invention, the View being taken substantially on line 1-1 on Fig. 4 and showing the arrangement of the gas producers with respect to the pair and sheet heating chambers and to each other.

Fig. 2 is a longitudinally vertical section through the sheet heating furnace and showing the arrangement existing between the gas producer, the heating chamber and the recuperator, together with the various parts and passages associated therewith.

Fig. 3 is a longitudinally vertical section throughthe pair heating furnace and showing the preferred arrangement existing be.

tween the heating chamber, the recuperator and the gas producer, the point of entry of the gases from the latter being the only part of the producer which is'clearly shown in this v1ew.

'F ig. 4 is a transverse vertical section` through the pair and sheet heating furnace showing the relative arrangement of the heating chambers with respect to each other and with respect to their recuperators.

In the drawings, the sheet heating chamberY is indicated at A, the gas producer for the same at B and therecuperator forming part ofthe furnace constructionat C. The pair.

producers opening directly into the heating chamber through the adjacent end wall and the other producer opening directly into the pair heating chamber through the'adjacent side wall. The pair heating chamberis of less width than the sheet heating chamber but is longer than the latter and extends beyond tle end wall against which the producers a ut. e

The two producers have a wall 6 between them and are preferably connected by a passage 7 extending through thewall whereby gases generated 1n one of the producers may flow into the other. This passage will' normally be kept closed in any suitable manner as, for example, by a sliding door 8 of suitable refractory material, the door being operable from without the furnace in any suitable manner as by means of a rod 9 leading from the door or closure through the furnace wall. The end wall of the sheet heating chamber against which the producers arev disposed is` ducer B is cut away to form a passage through which the gases from the producer B .may pass into the heating chamber,the producer B being so disposed with respect to the wall that a passage 12 is formed between said wall and the top of the producer7 said passage leading into a passage formed in the wall. The space between the roof and the heating chamber and the top of the wall 10 forms in effect a combustion chamber 14.

Air for supporting secondary combustion of the producer gases is suppliedv through ports 16 (Fig. 2) which lead downwardly from the top of the dividing wall l0 to a transversely extending passage 18 within the wall. Passage 18 is in communication with a hot air collecting chamber 20 by means of suitable passages 22, the air collecting chamber being formed above the recuperator C. The fresh air heated by the recuperator is supplie-d therebeneath by way of suitable passages 23 (Figs. 2 and 4). i

rlhe recuperator C is heated by the products of combustion flowing from the sheet heating chamber. The burned gases after reaching the far end of the chamber opposite the producer, which is'the end through which the work is removed from and entered into the chamber, passes through corner ports 24 in the chamber floor at either side of the work door 26 of the chamber into a trans versely extending passage or conduit 28 (Fig. 2) from which run longitudinally extending passages 30 which in turn open on a downwardly extending passage 32. The recuperator C fronts on this passage 32 and consequently the products of combustion will flow through the recuperator the latter being of hollovv7 tile construction, as clearly indicated in Fig. 4. rThe air to be heated circulates between the tiles in grooves or channels surrounding the tiles.

It is preferred that the products of combustion shall pass throu h the upper portion of the recuperator and to return through the lower portion thereof. To this end a passage 32 terminates approximately mid-way the top and bottom of the recuperator, the baiile plate 33 forming the bottom of the passage. The products of combustion after pass ing through the upper portion of the recuperator enter a passage 34 on which the other end of the recuperator fronts and then pass through the lower portion of the recuperator and into the passage 35 below the balile 33 this passage 35 leading to the stack G by way of a suitable passage 36 (Fig. 1) at one side of the furnace.

Access may be had to the

conduits

28 and 30 for the purpose of cleaning the same through clean-out orts 29 extending through the furnace wall, t ese clean-out ports being normally kept closed by suitable plugs.

Coming now to a description of the pair or bar furnace, it will be noted that the gas enerated in the producer E enters the pair heating chamber D through a transverselyl extending opening 50 (Fig. 3) formed in the the recuperator is heated by the products of combustion flowing from the chamber D as will presently be explained. Air is admitted to the recuperator at the bottom thereof through suitable passages 56 and cir- ,culates around the tiles of which the re-y cuperator is formed in apmanner already explained in connection with the sheet heating furnace. v

Extending longitudinally with the chamber D are two parallel tracks or piers 58 on which pairs or slabs X are supported as they are moved through the chamber. These tracks or piers are arranged in spaced relation to the sides of the chamber and with respect vto each other whereby side and central chau-A nels are formed. The burning gases in circulating in the chamber will pass around the slabs and between the same and some of the hot gases will find their way into the said channels. lIn order to permit free circula tion of the hot gases from one channel to another the piers are pierced by' ports or passages 60. The floor of the chamber at the far end of the same is pierced by ports 62 through which the products of combustion flow into a downwardly extending passage 64 which fronts on the upper portion of the recuperator, the bottom of the passage 64 being indicated at 66. The products of combustion upon entering the passage 64 pass through the upper portion of the recuperator into a passage 67 on which the other end of the recuperator fronts. Upon reaching this passage 67, the gases pass through the lower portion of the recuperator and enter al passage 68 which leads to a side passage 69 (Fig. l) which in turn communicates with the stack G.

The work door of the chamber D is indicated' at 70 and is 'on a level with the tracks or piers 58. In order to permit the channels -to be cleaned out, clean-out ports 71 are provided in the furnace wall below the door 70.

It will be noted that the tracks or piers 58 on which the slabs orvpairs X are supported are shown as arranged on an incline, the gradient running upwardly from the point of entry of the slabs into the chamber toward the door 70 through which they are removed. By providing the piers or tracks with a gradient of the character specified. the slabs X may be more readily held in a sloping position to prevent them from falling forward'lyrtwardstheoor 70 as they are moved through the chambe After the slabs or pairs have been entered into the chamber they are prevented from falling on their sides toward the point of entry by any suitable means such as dogs 72 mounted on the furnace wall.

No claims are made to the inclined tracks in this application inasmuch as claims cver ing that feature are made in a pending application.

The air chambers and 50 above-the recuperator C and F are normally independent of each other.' However, it is preferred to provide a conduit or passage 7 3 between them so that if found 'desirable hot air from one chamber may flow into the other, -it being understood that any suitable closure means generally indicated at 74 will normally keep the passagevclosed.

The preferred arrangement by which the gas producers are connected together and the recuperators are lconnectedd together gives a very flexible means of operating the furnace. This construction does not necessitate the careful watching'of each producer to see that it produces only such amount of gas as each separate furnace requires but the producers may be operated at any desi-red rates and one v may be used to supplement the other in taking' care of the necessary heat requirements. Furthermore, if the heat requirements fall it is possible to operate one producer to .provide for heat-ing both furnaces. The arrangement by which preheated air may bertransferrcdfrnmnnesrecuperatotoanother allows for the efficient heating of the air which is used in combustion and if one recuperator does not vsupply the suitable amount of air for burning the combustion gases of a producer furnace, this recuperator may be supplemented by the other recuperator.

What is claimed is:

l. In a sheet and pair furnace, the combination of two heating chambers arranged side by side with a dividing wall between them, a recuperator below each chamber, a gas producer at one end of one of said chambers, there being an opening in said dividing wall through which the gases generated in the producer are entered into the adjacent chamber, a second producer arranged alongside the first, there being an opening in the end Wall of the other chamber through which gases generated in the second producer are entered, means for leading the products of combustion of the respective chambers to and through the respective recuperators whereby the latter may be heated, means for supplying fresh air te thewreeuperators for heating, means for conducting the heated air to the respective points of entry. of the producer gases into the chambers, and means between the two producers permitting gases generated inthe one tomingle with the outlowing gases in the other.

2. In a furnace, the combination of a heating chamber having an o ening yin one end wall over which combustible gases may be entered into the chamber and having a workdoor in the other Yend wall, means for conducting the products of combustion from the chamber and beneath the licor thereof comprising a conduit extending transversely beneath the Hoor and opening into the chamber at, the corners on either side of the Workdoor,r branch conduits leading from said conduit toward the opposite end of the chamber, a recuperator through which the products of combustion flow before passing to the stack, and conduits leading from the recuperator to and through the end wall ovenwhich the Y heated-bythe recuperator may mingle Withsaid gases to support secondary combustion thereof.

3. lIn combination, a pair of independent heating chambers, a plurality of gas producers for supplying gas to said chambers a recuperator for each heating chamber, an means permittin the air heated by one recuperator to be iverted into the How channel for the air heated by the other recuperator.

4. In combination, a pair of independent heating chambers, a plurality of gas producers for supplying gas to said chambers, a recuperator for each heating chamber, means permitting the air heated by one recuperator to be diverted into the .How channel for the air heated by the other recuperator, and means permitting gas generatedby one producer to be diverted into the channel through which the gas frm the other producer normally flows. p

In testimony whereof aliix my signature.

` FRREST WILLIAM MANIER.