US1896178A - Reverberatory furnace - Google Patents

Description

Feb. 7, 1933. c. R. KUZELL.

REVERBERATORY FURNACE 2 Sheets-Sheet 1 Filed Oct. 24, 1950 ATTORN EY5 INVENTOR 'QMR-KMIBDLO BY Feb. 7, 1933. :c uz 1,896,178

- RYEVERBERATORY FURNACE Filed Oct. 24, 1950 2 Sheets-Sheet 2 Z425 Z 22 Z/ Fi W ]'2 3F 27 L '6/ 32 4 INVENTOR ATTORNEYS Patented F ch. 7, 1933 UNITED STATES PATENT o ncE assrenoa r unrrnn VERDE oorrm conronarron or DELAWARE CHARLES R. xuzELL, or cmxnarn, ARIZONA, 001mm, or CLABKDALE, ARIZONA, a

aavnannaaroar nausea 7 Application med October 24, 1930. Serial 10. 490,854.

beams results in the withdrawal of the sup port .necessary for maintaining the wall in its proper shape and condition with the resuit that the wall is weakened and bulges outwardly. Continued operation of a furnace in such condition isvery dangerous in view of the possibility of the weakened wall crumbling and permitting the molten maflow onto the operating floor.

This invention relates to metallurgy and has for an object the provision of improved metallurgical apparatus. More particularly, the invention contemplates the provision of an improved reverberatory furnace and an improved arran ement of reverberatory furnaces and waste eat boilers.

It is common ractice to utilize the hot gases from reverb eratory furnaces for gen terial to l 10 erating steam for various purposes. Boiler i The-present invention contemplates the plants are usually located near the sides or provision of an arrangement of reverberathe ends of the reverberatory furnaces, and tory furnace and boiler plant whereby an the boiler heating chambers are connected economy of space is effected and whereby with the reverberatory furnace chambers by the expense and heat losses due to the heremeans of horizontally extendin flues. Contofore customary type of arrangement are siderable space, in addition to t at occupied reduced. The invention further contemby the reverberatory furnace, is required forplates the provision of an improved type of the boiler plant in the heretofore customary supporting means for furnace walls. type of arrangement, and relatively long An arrangement of furnace and boiler flues are required for conducting the hot plant in accordance with the invention ingases from the reverberatory furnace chains volves the (placing of the boiler plant subbers to the boiler heating chambers. Such stantially irectly above the roof. of the fiues are expensive to install and maintain, reverberatory furnace in order that the boiland they permit relatively large heat losses er plant and reverberatory furnace may oobecause of their large exposed surfaces. cupy substantially the same ground space. The reverberatory furnaces are usually The supporting structure for the boiler plant provided with vertical beams-for supporting may straddle the furnace and its side supthe side walls. Each side of the furnace is ports may occupy a relatively small amount provided with a plurality of similarly spaced of ground space in addition to that occupied beams. The beams extend from points slightby the reverberatory furnace. The heating 1y below the ground line to points above the chamber of the boiler plant may communiupper surface of the roof. The beams are cate directly with the interior of the re wedged between the furnace wall and a con-' verberatory furnace through an openin in crete toe at the bottom and tie rods extending the reverberatory furnace roof and a s ort 35 transversely over the top of the furnace roof connect the beams at the top. Structures of this type are rigid and do not normally allow for expansion and contraction due to changes of temperature and pressure within 9 the furnace. During the course of normal furnace operations, considerable. outward pressure is continuously exerted against the lower portions of the beams, and it fre-. quently happens that the concrete toe, or the wedging means crumbles and permits the lower portion of one or more of the beams to move outwardly. Such conditions are commonly produced when the wedging means or the concrete toe 50 becomes wet with water. Movement of the between the toe and beam,

substantially r vertical flue. The heating chamber of the boiler plant may he s aced any desired distance above the roof of t e reverberatory furnace and a connecting fine of any desired length may thus be provided.

The preferred arrangement of apparatus includes a reverberator'y' furnace provided with firing means adjacent two opposite ends and having a gas discharge openin in the roof substantia lycentrally between t efiring ends. A boiler plant is disposed directly above theroof of the furnace adjacent the gas discharge opening, and the heating chamber of the boiler plant communicates with the interior of the furnace through a vertical flue surrounding the gas discharge opening.

The reverberatory furnace of the invention is provided with means for closing off one end portion to ermit independent operation of the other en portion. I

The wall supporting means of the invention includes resilient supporting members which offer yielding resistance to the movement of upright braces or beams which engage the side walls of the furnace;

The invention will be better understood from a consideration of the following description in conjunction with the accompanying drawings, in which Fig. 1 is a longitudinal sectional elevation of a reverberatory furnace and superimposed boiler plant;

Fig. 2 is a section taken substantially along line 22 of Fig. 1; and

Fig. 3 illustrates a method of tying-in the lower end portions of side wall supports.

The reverberatory furnace 10 is provided with firing means in the form of burners 11 for introducing mixtures of air and powdered coal into the interior of the furnace chamber at its two opposite ends. A gas discharge opening 12 is provided in the furnace roof 13 midway between the firing ends.

The furnace walls are supported on a foundation consisting of reinforced concrete Walls 14 provided with ledges for supporting vertical I-beams or buck stays 15 which ongage the side walls of the furnace. Short horizontal I-beams 16 having their ends embedded in the concrete foundation walls 14 and parallel concrete walls or piers 17 aid in supporting the beams 15 against vertical movement. Each side wall of the furnace is provided with a plurality of similarly spaced vertical supporting beams 15 and the upper ends of opposite beams are connected by tie rods 20.

' The lower ends portions of the vertical beams are held in position against the furnace wallsby means of the rods 21 each having one end anchored against a foundation wall 14 and the other end extending to a point beyond the vertical supporting beams on the opposite side of the furnace. The rods 21 are encased in pipes 22 which extend through the foundation walls and the earth between the walls and which are of reater inside diameter than the diameter 0 the rods. The ends of the rods 21 project into 0 en spaces between the. walls 14 and 17. e ends of the rods 21 are threaded and provided with nuts 23. A washer 24 is mounted on the lower end portion of each rod between the nut and the outer facesof a pair of spaced I-beams 25 the inner faces of which bear against a beveled surface on the foundation wall. A helical spring 26 is mounted axially on the up or end-portion of each rod 21 between a was er 27 which bears against the nut and a plate 30 which bears against the outer faces of two parallel I-beams 31. The inner faces of the I-beams 31 lie in contact with a beveled bearing plate 32 which extends between and bears upon the outer faces of two adjacent vertical beams 15. Instead of the separate tie rods for the lower portions of the side wall braces on each side of the furnace, horizontal rods connecting side wall braces on opposite sides of the furnace may be employed, and the horizontal tie rods may be provided with springs or other resilient means at one or both ends. v t

The furnace chamber is rovided with slots 33 in its roof and side wal s on opposite sides of the gas discharge opening to permit the insertion of a damper or curtain 34 for closing elf one end portion of the furnace to permit independent operation of-ithe other end portion. The slots 33 may be wide expansion joints which are normall closed'by suitable bricks or tiles 35. The ampers or curtains may be of any suitable construction, and they may be mounted for use in any suitable manner. A sheet metal casing provided with suitable connections for permitting circulation of water therethrough forms a suitable damper or curtain. The dampers may be suspended above the furnace by means of pulleys and cables (not shown). The slots and dampers may be of any suitable configuration.

Three tap hole blocks 36 provided with tap holes for withdrawing matte are provided in one side wall of the furnace.

One tap hole block is located at about the longitudinal center of the side wall and one on the opposite side of each damper slot. skimming block 37 and opening are located at. about the longitudinal center of the oposite side wall.

A boiler plant consisting of two heating chambers 40 each having a standard make of boiler 41mounted therein is mounted directly above the furnace on a frame structure 42 which straddles the furnace. The upright members of the frame structure 42 are supported by the concrete piers 17. The heating chambers 40 are connected to the reverberatory furnace by means of a short vertical flue 43 which surrounds the gas discharge opening 12 in the roof of the furnace. Water cooled dampers 44 are provided for closing the heating chambers when necessary.

The reverberatory furnace illustrated in the drawings is, in effect, a double reverberatory and it may have a length equal to substantiall twice the length of the normal furnace. he ap aratus of the invention may include a rever eratory furnace havin firing means at one endonly instead of a urnace having firing means at two opposite ends.

I claim:

1. The combination with a reverberatory furnace provided with firing means adja cent two opposite ends of a boiler plant disposed directl above said furnace substantially centra y between the firing ends, and

a flue for conducting hot gases from the interior of said furnace to said boiler plant.

2. The combination with a reverberatory furnace comprising a substantially rectangular furnace Chamber provided with firing means adjacent two opposite ends and'having a gas discharge opening in its roof between the firing ends of a boiler plant disposed immediately above the furnace chamber adjacent the gas discharge opening, and a flue for conducting hot gases from the interior of the furnace chamber through the gas discharge opening to the boiler plant. 1

3. Apparatus of the class described, comprising a reverberatory furnace provided with firing means adjacent two opposite ends, a substantially centrally disposed gas discharge flue extending transversely of the furnace chamber between the side walls, and a boiler plant disposed above and connected to the gas discharge flue.

4. A reverberatory furnace comprising a furnace chamber, firing means adjacent two opposite ends of said chamber, a gas outlet between the two firing ends, and means adjacent the gas outlet for dividing said furnace chamber to permit the independent operation of one end portion.

5. Apparatus of the class described comprising a reverberatorv furnace provided with firing means adjacent two opposite ends, a substantially centrally disposed gas discharge flue extending transversely of the furnace chamber between the side walls, a

boiler plant disposed above the furnace and connected to the gas discharge flue, and means adjacent the gas outlet for dividing the furnace chamber to permit independent operation of one end portion, the dividing means being so disposed as to permit gases to flow through the discharge flue to the boiler plant during the course of operation of one or both end portions of the furnace chamber. In testimony whereof I aflix my signature.

CHARLES R. KUZELL.

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