US1769210A - Furnace - Google Patents

Description

July 1, 1930. G. L. DANFo-RTH, JR

FURNACE Filed Jari. 2s. 1922 2 sheets-.sheet 1 gf kg. j H H j@ /-W 16 2 10 J5 j! 4 I l] l v 13 75. '14/ July 1, 1930. G. DANFORTH. JR 1,769,210

FURNACE Filed Jam. V28', 1922 2 sheets-sheet 2.

awww @QZ/W w N Patented July 1, 1930 GEORGE L. DANFORTH, JR., OF CHICAGO,

ILLINOIS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO OPEN HEARTH COMBUSTION COMPANY, OF CHICAGO, ILLINOIS, A

CORPORATION OF DELAWARE FUR/NACE Application led January 28, 1922. Serial No. 532,441.

improved construction of ports and passages in connection with reversible regenerative furnaces.

As is well known in the art, reversible regenerative furnaces, such as open hearth steel furnaces, are provided with similar ends and the ports and passages upon opposite ends serve alternately to introduce the air and fuel and to conduct away the products of combustion. Since the products. of combustion exceed in volume the entering airand fuel, it is necessary to provide ports and passages of an area adapted to carry olf the products of combustion. Ports of this necessary area do not adequately direct and control the incoming air and gases and hence do not provide the most eifcient working flame. 'Furthermore, the design of a port for introduction of gases is of necessity different from that most desirable for carrying of gases in the opposite direction.

Various constructions, such as that shown in the patent to. McKune, No. 1,339,855, dated May 11, 1920, have been vdesigned whereby additional passages A are provided upon the outgoing end, these passages being closed by dampers upon the incoming end.

According to the presentinvention, the air uptakes, which also serve as downtakes to carry oif the products of combustion, are provided with dampers adjacent their point of junction with the furnace proper. The

present furnace is adapted for use with liquid or gaseous fuels which are not'preheated and supplemental passages are provided connecting the uptakes at a point below the dampers to the fuel introduction port.

It is an object of the present invention 'to provide a furnace construction such that adequate port area is provided for carrying off the products of combustion and such thatthe incoming air is properly directed to produce an efficient working fiame.

It is a further object to provide a construction of this character in which spaced ports of relatively great area are provided for carrying 0H the products of combustion and in which a port of comparatively small zftrei is provided for introducing the air and It is an additional object to provide a construction which is simple in design and which may be applied to existing installations without material alteration thereof.

Other and further objects will appear as the description proceeds.

I have illustrated a particular embodiment of my invention in the accompanying drawings, in which- Figure 1 is a vertical section showing an end of the furnace constructed according to my invention.

Figure 2 is a horizontal section, partly broken away; and

Figure 3 is a transverse vertical section through the furnace end.

As shown in the drawings, the furnace chamber 4 is provided at either end with the spaced discharge ports 5 which lead downwardly adjacent the end walls 6 of the furnace. Outwardly inclined passages 7 which serve both as uptakes and downtakes lead from these ports to the slag pocket 8, the upper portion of the slag pocket being directly connected to the checker chambers 9. The-horizontal dampers 10 are located adjacent the upper ends of the uptakes. As shown these dampers are horizontally movable by means of the shaft 11 which is provided with gears 12 meshing in yracks 13 connected to the dampers.

Supplementary passages 14 lead from t-he uptakes 7 at points below the dampers 10 and these passages extend horizontally at 15 and together join to form the passage 16 leading to the entrance port 17. This entrance port 17 is directed through the watercooled opening 18 in the furnace end wall. It will be observed from Figure-2 that the entrance port 17 is directed intermediate the two discharge ports 5. The nozzle 19 is introduced through the rear of the port and serves to introduce the fuel.

Upon the incoming end of the furnace, the dampers 10 close off the discharge ports 5. The reheated air comes through the checker amper 9 and up the upstakes 7 and thence through the supplemental passages 14 to the port 17.- rlfhe fuel is introduced through nozzle 19. This entrance port 17 serves to adequately direct and control the incoming air and fuel and an eicient iame maybe maintained.

Upon the outgoing end, the dampers 10 are drawn outwardly and the products of combustion may pass directly through the ports 5 and thence down the uptakes 7 and out through the checker chamber. Thus an adequate area is provided for the products of combustion and these are readily conducted away without the necessity for forced`draft means. Further, the wear upon the entrance -port 17 due to the erosion caused by heated outgoing gases is materially reduced.

The form of construction shown is illustrative only and it is my intention to cover all modifications coming within the spirit and scope of the appended claims.

I claim:

1. In a regenerative furnace, a pair of uptakes connecting the regenerators and the furnace chamber at each end thereof, the uptakes terminating in spaced ports in the furnace floor, and an incoming fuel and air port extending` through the furnace wall intermediate the spaced ports, said fuel and air ports being independent of the furnace walls.

2. In a regenerative furnace, a pair of uptakesl connecting the regenerators and the furnace chamber at each end thereof, the uptakes terminating in spaced ports in the furnace Hoor, an incoming fuel and air port directed intermediate the spaced ports, and supplement-ary passages connecting the. uptakes and the fuel and air port.

3. In a regenerative furnace, a pair of uptakes connecting the regenerators and the furnace chamber at each end thereof, the uptakes terminating in spaced ports in the furnace floor, an incoming fuel and air port directed intermediate the spaced'ports, supplementary passages connecting the uptakes and the fuel and air port, and dempers located in said uptakes above the junctions of the supplementary passages with the uptakes.

4. In a regenerative furnace, furnace ends vof Januar 1922.

EoRGE L. DANFORTH, JR.

having uptakes terminating in the Hoor of the ends, each end being unobstructed between the termination of the uptakes therein, and a port in the end wall of the furnace terminating between the uptakes.

5. In a regenerative furnace, furnace ends having uptakes terminating in the floor of the ends, each end being unobstructed between the termination of the uptakes therein, dampers in said uptakes, and a port in the end wall of the furnace terminating between the uptakes.

6. In a regenerative furnace, furnace ends i having uptakes terminating in the Hoor of the ends, each end being unobstructed be-

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