US1365436A

US1365436A - Slag-pocket floor

Info

Publication number: US1365436A
Application number: US146396A
Authority: US
Inventors: Samuel G Worton
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-02-03
Filing date: 1917-02-03
Publication date: 1921-01-11
Anticipated expiration: 1938-01-11

Description

' G. WORTON.

SLAG POCKET FLOOR.

APPLICATION FILED FEB. 3. 1917.

1,365,436. Patented Jan. 1921.

2 SHEETS- T I.

FIG- 1 FIG. 2

WITNESSES INVENTOR S. G. WORTON.

SLAG POCKET FLOOR. APPLICATION FILED FEB, 3. 1917.

1,365,436. Patented Jan. 11, 1921.

2 SHEETS-SHEET 2.

FIG-3 WITNESSES INVENTOR specification.

SAMUEL G. WOB-TON, OF DUQUESNE, PENNSYLVANIA.

SLAG-POGKE'I FLOOR. 7

Specification of Letters Patent.

Patented Jan. 11, 1921.

Application filed February,3, 1917. Serial No. 146,396.

To all wiwm'it may concern:

Be it known that I, SAMUEL G. WoR'roN, a'citizen ofthe United States, residing at Duquesne 1n the county of Allegheny and State of len'nsylvania, have invented certain new and useful Improvements in Slag- Pocket Floors, of which the following is a.

My invention relates to the construction of regenerative reverberatory furnaces and more particularly to the construction and arrangement of the flues which connect the ports, located at each end of such furnaces, with the furnace regenerator chambers.

In operating regenerative furnaces large quantities, of finely divided solids which are carried in suspension in the waste gases or products of combustion, pass from the furnaces through the ports into the regenerator flues and become deposited in the flues and regenerator chambers. With regenerative open hearth furnaces it also frequently happens that in operatingsuch furnaces slag Will boil over the furnace ports and enter the furnace flues connecting the ports and re enerator chamber of the furnaces.

he accumulations of such materials in the flues lessen the eflidiency of the furnaces and occasion frequent delays in the operation of the furnaces in order to remove the materials which are highly heated when entering the flues. I

One object of the invention is the pro vision of means whereby finely divided solids and (in the case of openhearth furnaces) any molten slag entering the flues, are pocketed or collected and are quickly cooled as pocketed orcollected, so as to enable accumulations of such materials to be easily and quickly removed and to avoid longdelays in the operation of the furnace otherwise necessary in order that the accumulated 'materials may cool sufiiciently to permit of their being handled manually in the removal thereof.

Another object of my invention is to provide a regenerative furnace having flues adapted to rapidl cool or chill the finely divided solids an molten slag as they are pocketed or collected, so as to enable the I collected material to be easily and quickly.

removed from the flues during stops in the operation of the furnace at the end of each week-or during shorter or longer intervals when 'for any reason the operation of the furnace is interrupted, and therebyefiect a saving of time-and labor in the operation of the furnace, and lessen and to a large extent solids into the furnace regenerators.

A further object of this invention is the provision of a regenerative furnace wherein the flues connecting the furnace hearth and regenerator chambers havethe novel arprevent the passage of finely divided rangements, constructions and combinationsv of parts shown in the drawings, to be more fully described hereinafter and to be specifically pointed out in the appended claims.

Referring now to the part of this specification, Figure 1 is a sectional end elevation at one endof a regenerative furnace showing the flues connecting the furnace and furnace regenerators constructed and arranged in accordance with my invention.

Fig. 2 is-a sectional side elevation of the furnace shown in Fig. 1, the section being taken on the line II-II of Fig. 1.

Fig. 3 is a sectional plan showing the arran ement and location of the flues relative to t e end of the furnace and the furnace regenerators, the refractory material on top of the metal floor being omitted for the sake of clearness.

Fig. 4 is a sectional elevation showing details 1n the construction and arrangement of the removable metal floors as constructed in accordance with my invention.

Fig. 5 is a longitudinal sectional elevation showing details in the construction of-a sectional metal floor made in accordance flues forming slag pockets in which quanti ties of finely'divided solids or slag or both.

become deposited during the operation of the furnace. The enlarged flues or

slag pockets

7 and 8 at the end opposite that to which the vertical flues 5 and 6 are connected open into there-generator chambers 9 andlO.

drawings forming A similar arrangement offair and gas ports 3 and 4 and vertical and horizontal flues or

slag pockets

5, 6, 7 and 8, are employed to connect the other end of the furnace 2 with the air and gas regenerators for that end of the furnace.

In each of the

slag pockets

7 and 8 is a hollow metal water cooled floor which is removably secured on the bottom or refractory floor of,the slag pocket. The metal floor may be formed of an integral hollow casting 11 as shown on the bottom of the slag pocket 8' or may be made in sections in the manner shown on the bottom of the slag pocket 7.

The removable metal floors preferably are water cooled, suitable provision being made to cause a constant circulation of water or other cooling fluid within the hollow floor.

The integrally formed and removable floor 11 shown in the slag pocket 8 is rectangular in cross section and of a Width equal to or slightly less than that of the slag pocket. Its inner end is closed and the other or outer end, which projects through the vertical end wall 12 of the slag pocket 7, has an opening 11 therein and is curved upwardly.

On account of the width of the rectangular casting forming the floor 11, vertically extending partitions13 are provided within the casting to effect a circulation of the cooling 'fluid and to support and prevent warping of the large flat top and bottom surfaces of the casting.

Inserted in the open end 13 of the floor 11 is a plurality of supply pipes 14, these pipes extending inwardly to a point closely adjacent totlg inner end of the hollow casting or floor. The outer ends of the pipes 14 are connected to a source of water supply or other cooling medium used, and the open end 13 of the floor casting discharges the waste water into the overflow trough 15 in front of and at a level slightly below the open end of the hollow metal floor. A drain'pipe 16 is provided on the trough 15 to carry away the water discharged therein fromfthe floor casting 11.

In the hollow metal floor construction shown in the slag pocket 7, a series of wrought metal pipes 17 are employed to form ,a cover for the floor, these pipes being laid side by side and having the inner ends thereof closed by means of plugs 18 which preferably are welded in place. The outer ends of the pipes forming the hollow metal floor project beyond the end of the slag pocket 7 and terminate in pipe fittings'19 known as Ts. The branch outlets 20 of these Ts extend upwardly and are provided with short pieces of pipe 21 so as to at all times maintain a head of water within the pipes.

A small water supply pipe 22 is inserted in each of the pipes 17 through the plug 23 screwed in one end of the Ts 19, the inner ends of the supply pipes extending to the point adjacent to the inner ends of the lar e pipes 17 and the outer ends of the supp y pipes 22 are connected to a source of Water supply.

Each of the short pipes 21 forming branch outlets on the Ts has a small overflow pipe 24 therein which is arranged to discharge into an overflow trough 15 in front of the pipes. The overflow pipe 15 is provided with a drain pipe 16 leading to a sewer or other place of disposal of the water used in cooling the metal floor of the slag pocket.

After the removable metal floor is positioned on the bottom of the slag pockets, it is covered with a layer of refractory material 26, this material preferably being in a finely divided state. The refractory material acts as an insulator and protects the metal floor from the intense heat of the initial layer of slag and also preventing sticking of the slag to the floor and facilitating the removal of deposits of the materials.

The ends of the slag pockets are ordinarily closed by a temporary wall 25 which is in place during the operation of the furnace and which is torn down in order to remove accumulations of slag and other solids collected in the slag pocket, the wall being rebuilt after each time the slag pockets are cleaned.

In the operation of furnaces equipped with my invention the finely divided solids become deposited in the large flues forming the

slag pockets

7 and 8, and in the case of an open hearth furnace, any molten slag Which boils over the ports 2 and 3.into the flues formin the slag pockets becomes deposited on file metal floor formed by the casting 11 or pipes 17. As the floor is water cooled it maintains the layer of refractory material on top of the floor in a cooled condition and rapidly chills the finely divided solids and any slag on the floor so that accumulations of these materials become built u in layers and do not form a solid mass. T lle layers of accumulated material are separately cooled so that when it is desired to remove accumulations it is necessary to delay the operation of the furnace for a long time interval in order for the accumulated materials to cool sufficiently to permit of their removal. In this way the time required in vremoving accumulated materials from the slag pockets is reduced and the necessity of stopping the operation of the furnace for long time intervals in order to remove such materials is avoided and overcome. The removable metal, water cooled floors may be applled to exlsting furnaces 'without changes in the construction of the flues or slag pockets and can be removed or renewed at any time without altering the. floor or side walls of the slag pockets or flues.

Modifications in the construction and arrangement of the metal water cooled floor forming the novel feature of my invention may be made, the layer of refractory materlal on top of the metal floor may be omitted when desired, and other changes may be made without departing from the 1nvention as defined in the appended claims.

I claim 1. In a regenerative furnace, the combination with a furnace regenerator and a flue opening-into the interior of the furnace, of an interposed sla pocket connecting the regenerator to the ue, said slag pocket havinga refractory bottom and having a hollow metal floor removably supported on said refractory bottom, and means for circulating a cooling medium within said hollow metal oor.

2. In a regenerative furnace, the combination with the furnace regenerators and flues opening into the interior of the furnace, of

interposed slag pockets connecting the regenerators to said flues, said slag pockets having refractory bottoms and having hollow metal floors removably supported on said refractory bottoms, and means for circulating a cooling medium within said hollow metal floor.

3. In a regenerative furnace, the combination with the furnace regenerators and flues opening into the interior of the furnace, of interposed slag pockets connecting the regenerators to said flues, said slag pockets having refractory bottoms, sectional hollow metal floors removabl supported on said refractory bottoms, and means for circulating a-coo'ling medium within each section of said hollow metal floor.

4. In a regenerative furnace, the combination with the furnace regenerators and flues opening into the interior of the furnace,'of interposed slag pockets connecting said regenerators to saidv flues, said slag pockets having refractory bottoms, metal floors removably supported on said refractory bottoms, said metal floors bein made in sections, and the sections being ollow and extending to the exterior of the slag pockets, a conduit within each floor section for discharging a coolin medium at the inner end thereof, an ove 0w outlet at the opposite end of each section, said outlets opening into the atmosphere and being elevated above the level of the main portion of the floor sections to maintain the cooling medium under a head, and a covering of refractory material on top of said sectional metal floor.

5. In a regenerative furnace, the combination with the furnace regenerators and flues opening into the interior of the furnace, of interposed slag pockets connecting said regenerators to said flues, said slag pockets having refractory bottoms, metal floors re movably supported on said refractory bottoms, said floors being made in sections and the sections being hollow, a conduit within each metal floor section for delivering water to the inner end thereof, an overflow outlet at the opposite end of each floor section, said outlets opening into the atmosphere and being elevated above the level of the body portion of the floor section to maintain the Water under a head, and a loose covering of finely divided refractory material on top of said sectional metal floor.

6. In a regenerative furnace, the combination with a furnace regenerator and a flue opening into the interior of the furnace, of an interposed slag pocket connecting the regenerator to the flue, said slag pocket having a refractory bottom and having a hollow metal floor removably supported on said re fractory bottom, means for circulating a cooling medium within said hollow metal floor, and a loose covering of finely divided refractory material on top of said hollow metal floor.

7. In a regenerative furnace, the combination with the furnace regenerator-s and flues opening into the interior of the furnace, of interposed sla pockets connecting the regenerators to t e flues, said slag pockets having refractory bottoms and removable metal floors supported on said refractory bottoms, said metal floors being hollow and extending outwardly beyond one end of said slag pockets, conduits for delivering water to the inner end of said removable metal floors and an overflow outlet at the projecting end of the floors, said outlets being arranged to maintain the water within said hollow floors under a head.

8; In a regenerative furnace, the combination with the furnace rcgenerators and fluets opening into the interior of the furnace, of interposed slag pockets connectingsaid regenerators to said flues, said slag pockets having refractory bottoms with metal floors removably supported on said refractory bottom, said floors being hollow and extending outwardly beyond one end of said slag pockets, conduits for delivering water to the inner end of said hollow metal floors. and an overflow outlet at the opposite end of the hollow metal floors, said outlets opening into the atmosphere and being elevated above the level of the metal floor to maintain the water within the hollow floor under a head.

In testimony whereof I have hereunto set my hand.

SAMUEL G. lVOR-TON.