US479430A - Water-cooling device for furnaces - Google Patents

Description

(No Model.)

J. KENNEDY. WATER COOLING DEVICE FDR FURNAGES.

Patented July 26, 1892.

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lllNrrn` States JULIAN KENNEDY, OF PITTSBURG, PENNSYLVANIA.

WATER-COOLING DEVICE FOR FU RNACES.

SPECIFICATION forming part of Letters Patent No. 479,430, dated July 26, 1892.

Application filed February 19, 1892. Serial No. 422,150. (No model.)

To all 1071.077?, it may concern:

Beit known that I, JULIAN KENNEDY, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Vater-Cooling Devices for Furnaces, of which the following is a full, clear, and exact description, refer- -ence being had to the accompanying drawings, forming part of this specification, in which- Figure l shows a vertical section of the lower part of a blast-furnace, the section being through the iron tap-hole, which is provided with vrny improved water-cooling appliance. Fig. 2 is a view, on a larger scale, showing the iron tap-hole with part of the front plate broken away to illustrate better the construction. Fig. 3 is a horizontal section on the line lll Ill of Fig. l on the same scale as Fig. 2. Fig. 4 is a vertical sectional view showing a modilied arrangement of the watersupply pipe.

Like symbols of reference indicate like parts in each.

In the operation of the blast-furnaces trouble has been experienced heretofore in pro viding efficient water-cooling devices for cooling the iron tap-hole. The cooling of the wall of the furnace at other places around the hearth can be effected conveniently by discharging Water upon the outer casing or jacket; but this has not been possible at the iron-tap because of the danger which would result from the access of water to the parts of the tap-hole from which the iron iiows. Resort has been had, therefore, to watercooled plates built in the furnace-wall; but the liability of such device to burn out or to become choked, especially where muddy watcr is used, and the difficulty of replacing them when choked or burned make them very undesirable.

The object ofniy invention is to obviate these difficulties and to provide a construction by which the wall of the furnace about the iron tap can be cooled as well as any other part of the exterior wall of the hearth and with as little danger.

To this end it consists in providing the furnace at the tap-hole with a splash-plate or eX- terior shell having ahole registering with the tap-hole and provided with an intermediate frame or guard, which separates the tap-hole from the space between the furnace-casing and said shell, water being discharged upon the furnace in the intermediate space, which is open at the top or at one or both of its ends, so as to afford easy access to the interior to prevent clogging up of the space and consequent danger of explosion, che.

ln the drawings, 2 represents the wall of a blast-furnace hearth, having the usual metal jacket 3, and et represents the iron tap-hole, which is formed in the wall, in register with a similar opening in the jacket.

5 is a frame or guard, which surrounds the tap-hole and projects laterally outwardly from the jacket.

6 is the splash-plate, consisting of a metal shell placed upon the frame 5 parallel with the metal jacket and separated thereby from the shell, so as to afford an intermediate space Z1. This plate projects to a considerable distance, as shown, beyond the sides and above and below the tap-hole and is secured to the furnace-jacket at proper intervals by rivets and separators 7. The joints between the frame 5 and furnace-casing and between the frame and splash-plate are tightly caulked, so as to prevent the leakage of water. The space l) is open at the top and ends or at one of these places, but may be closed at the bottom by a metal bar or rib 8.

To cool the furnace-j acket withinthe splashplate, I employ a water-supply pipe 9, set at the top of the space- Z) and adapted to discharge continuous jets of water on the jacket. This water iiows down the jacket Within said space and around the frame 5, and thus keeps these parts cool, preventing their destruction by the heat of the furnace; but because of the presence of the frame the Water is prevented from getting access to the iron tapchannel, and the device is thus rendered quite safe. The water escapes from the space b at the ends of the splash-plate, and thence liows into the usual discharge-gutter surrounding the furnace. By having the space b open at the ends access to the interior is afforded,en abling it to be cleaned readily by means of an iron rod if it should become clogged with dirt.

In Fig. 4 I show a modified arrangement of TOO open `to afford access to the intermediate space, and a water-supply pipe adapted to wet the furnaee-wallswithinthesp1ashp1ate,substan tially as and for the purposes described.

In testimony whereof I have hereunto set 15 my hand this 15th day of February, A. D. 1892.

JULIAN KENNEDY. Witnesses: W. B. CoRwIN, H. M. CoRwIN.

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