US1337454A

US1337454A - Heat-treating furnace

Info

Publication number: US1337454A
Application number: US301975A
Authority: US
Inventors: Charles J Kirk
Original assignee: Individual
Current assignee: Edplant BV
Priority date: 1919-06-05
Filing date: 1919-06-05
Publication date: 1920-04-20
Anticipated expiration: 1937-04-20

Description

C. J. KIRK. HEAT TREATING FURNACE. APPLICATION FILED luNE 5, 1919.

Patented Apr. 20, 1920.

sTaTns TnTnriT CHRLES Il'. KIRK, OF NEW CASTLE, PENNSYLVANL.

HEAT-TREATING FURNAGE.

Spectcation of Letters Patent.

Eatented Apr. 209-1920.

Application led .Tune 5, 1319. Serial No. 301,975.

Treating Furnaces; and l do hereby declare i the following to be a full, clear, and exact description thereof.

My invention relates to a heat treating furnace.

, ln an application filed by me on the 1st of March, ieit, Semi No. 280,131, I have illustrated and described a heat treating furnace in which the objects to be heated are not subjected directly to the hot products of combustion, but are subject to the indirect action of the heat and-suitable for the burning of pottery or the annealing of metal. ln that application, the furnace was divided into two compartments with tracks in each compartment, the cars on one track entering iii the opposite direction from the cars on the other track, provision being made for utilizing the heat emanating from the heated cars, and the objects carried thereby on one track for aiding and heating the objects on the cars entering the furnace from the opposite end on the other track, by providing the partition wall with a series of openings at the top and bottom to allow for the free circulation, so that the' hot air passing through the upper openings.

will pass down through the other .compartment, and through the lower openings back into the original compartment whereby a constant circulation is maintained and the time required for treatmentgreatly reduced' as well as the amount of fuel required.

The present invention has relation to a furnace of this character and the special iinprovement will be more particularly herein-V after set forth and claimed.

` ln the accompanyingvdrawing, Figure l is a plan view partly in section broken away of my improved furnace; Fig. 2is a longitudinalsection broken awaypFig. 3 is an enlarged cross section on the line 3 -3, Fig. l; and Fig. a is a longitudinal vertical section of a portion of one of the compartments of the furnace showing the face of the inner wall thereof. l

fin the drawing,jthe numeral 2 designates a suitable base or foundation upon which the furnace is erected, said furnace consisting of the side walls 3 and the top or crown 4. The heating furnace 5 is divided into two compartments-by the partition wall G which also aids to strengthen and support the roof 4. This partition wall is provided with the opening 7 arranged at intervals at the top and adjacent to the bottom thereof,

and preferably staggered with relation tof each other.

Suitable combustion chambers

8 and 9 are 4provided at each side of the furnace for supplying the heat whether aseous or solid fuel is employed. PEhese urnaces may be of any suitable construction, and l `have only illustrated them in a diagrammatic form in Fie'. 1.

Communicating with the

combustion chambers

8 and 9 are the lues l0 and l1, respectively, in the side walls of the furnace. The flues 10 communicate with each other through the flue l2 which passes over the top of the furnace chamber 5 and the ilues 11 communicate through a like flue 13.

'ljhese flues i0 and ll are non-communicating, being separated from each other by the wall i4. lOutlet flues l5 and 16 are provided for the flues l() and 11, respectively.

T he inner walls of the ueslO and 11 are .made'up of hollow tiles 17, said tiles being supported on the ledge 18 and being set close together to form tight joints with each other. rlhe upper and lower ends of these tiles are open communicating with the two compartments of the heating chamber and the upper and lower ends of said tiles are preferably beveled as indicated at 19. 7lhese tiles form an insulating wall between the flues 10 and 1l and the heating chamber, so that the heat from said fiues is not directly conveyed through the wall to the objects to be treated but the hollow tiles furnish an opportunity for the circulation of the air so as to protect said base against the direct radiation, and furthermore, the wall itself is protected. and its life prolonged.

Within the heating chamber are the tracks 20 and 2l upon which the

cars

22 and 23 trayel, respectively, said cars being made up .of suitable refractory material to withstand the high heat to which they are subjected in passing through the furnace. The objects 24 to be heated are arranged upon said The ends of the furnace are provided with suitable doors 25.

In the operation of the furnace, the Ware mounted on the cars 22 is introduced into the furnace at one end, and the Ware mounted on the cars 23 is introduced on the opposite track at the other end of the furnace. Heat from the

combustion chambers

8 and 9 passes through the iues 10 and'll, and also by the lues' l2 and 13 to the lues at thelopposite side. C ars of the ware as they pass through the heating chamber are heated to a high temperature getting hotter as they near the discharge end. Accordingly the heat given off byi said highly heated cars and the objects carried thereon ascending will pass through the4 openings 7 n the partition 6, and said heat is employed for assisting in the heating of the cold cars which are coming in on the next track in the opposite direction inthe next compartment of the heating chamber. These cold cars being cooler, vchill the air and it passes through the bottom openings 7 in 'the partition wall and passes up through the heated cars on the opposite track, and being heated thereby, ascends and escapes through the openings 7, thereby creating a circulation. There will also be. a circulation of heat through the hollow tiles 17, as they communicate top and bottom with the heating chambers, and this will further greatly increase the heating efficiency of the furnace, and instead of there being a direct radiation .of the heat from the ues l0, the hollow tiles provide for the passage of heated air which protects the furnace walls and at the same time gives better circulation.

It is apparent that instead of the use of the individual tiles forming the inner wall of the iue Vl0,- other constructions may be employedproviding for such a. hollow wall,

and such modified constructions are included within the scope ofomy invention.

What I claim is:

1. In a heat treating furnace having a heating chamber, heating'iiues formed in the side walls of said furnace, a longitudinal partition wall dividing said chamber into two compartments, said partition having openings at its upper and lower portions, the inner sides of said Walls of said heating filles forming side walls of said heating chamber having an air space communicatlijng top and bottom with said heating cham- 2. In a heat treating furnace having a heating chamber, heating flues formed in said walls of said furnace, a longitudinal partition wall dividing said chamber into two compartments, said partition having openings at its upper and lower portion. hollow tiles forming the inner wall of said heating lues and the side walls of said heating chamber, said hollow tiles-communicat ng top and bottom with said heating cham- 3. In a heat treating furnace having a heating chamber, heating fines formed in said Walls of said furnace, a longitudinal partition wall dividing said chamber into two compartments, said partition having openings at its upper and lower portion, hollow tiles forming the inner wall of said heating fines to the side walls of said heating chamber, said tiles having beveled upper ends and communicating top and bottom with said heating chamber.

In testimony whereof, I the said CHARLES J. KIRK, have hereunto set my hand.

CHARLES J., KIRK.

Witnesses:

RoBT. D. Tor'rEN, A. E. CLANcr.