US2075602A - Furnace wall structure - Google Patents

Description

W M A 7/ /H/ V I M,- D V. 0 0 0 R M U v mm w v o 4 m n \o v m A F. MR g w M 72 U m H m U 1 M m A March 30, 1937. (5. w. DAVEY FURNACE WALL STRUCTURE Filed Aug. 25, 1954 Patented Mar. 30, 1937 UNlTED STATES PATENT ,IOFFICE' Application August 25,

In Great Britain August 28, 1933 15 Claims.

The present invention relates to furnace wall structureand has particular reference to furnace wall structure of the kind comprising an outer supporting framework arranged to sectionally support an inner furnace wall comprising blocks of refractory material.

, Heretofore refractory wall structures of the above character have been-constructed so that the refractory blocks could be removed or inserted only from the inner or.- furnace side of the wall. In many instances this construction is a decided dlsadvantageparticularly in cases where the wall is used in conjunction with so-called water walls comprising rowsof water tubes adjacent to the furnace side of therefractory wall. Furthermore, in prior forms of sectionally supported furnace wall constructions, the refractory blocks sometimes break and frequently certain sections of the furnace wallkdeteriorate much morerap idly than'othersu When this occurs it is necessary to shut down the furnace and permit it to'cool before repairs can be made. The disadvantage of having to shut down and 0001 an entire furnace in order to make a minor repair to a portion of the furnace wallis of course obvious. It is accordv ingly a general object of the presentinvention to provide a sectionallysupported refractory fur-,

nace wall arranged so that the individual refractory blocks-comprising the inner wall can be removed or inserted readily from the outside of the furnace. It is a further object of the'invention to provide a wall of the character under consideration so arranged that the refractory blockswill be firmly held in place while at the same time being readily removedwhen desired. A still further object of the invention is to provide a sectionally supported refractory wall of simple and inexpensive construction that will provide the above enumerated advantages and in which leak- 0 age of air into the furnace between adjacent rows of refractory blocks is prevented by simple and inexpensive packing means. .Still another object of the invention is to provide a novel form of re fractory block for as wall of the character de- 5 scribed which has relatively great "structural strength and which is not likely to break in normal service. 1

The mannerin which the-above and other and more detailed, objects 'ofthe invention are at- 0 tained, together with the advantages to be derived from the use of the invention, will appear more fully in conjunction with the ensuing description of one practical embodiment of the invention which is illustrated in the accompanying draw- 5 ing by way of example.

1934, Serial No. 741,452

In the drawing: 1

Fig. 1 is a vertical section-through a furnace Q wall structure embodying on the line l- -l of Fig. 2; 7

Fig. 2 is a section taken on the line 2-2. of Fig. l, certain of the. blocks being broken away to more clearly illustrate apart of the supporting structure;

the invention, taken Fig. 3 is a perspective view of one of the refractory blocks shown'in Figs. 1 and 2; and

Fig. 4 is an elevation of a portion of the block supporting structure.

In the embodiment illustrated, the outer supporting structurecomprises a row of spaced vertical I-beam columns ID. A series of vertically spaced horizontal beams II are attached tothe inner or furnace side of the columns I 0 as by means of the bolts I 2 As shown in Fig. 1, each of the beams II is of channel form in cross-sec tion, the web of the channel being vertical and in contact with the flanges of the columns and the two spaced'fianges of the beam' slopingupwardly and inwardly away from the columns toward the furnace. Each horizontal beam servesto sup- I4 is recessed to fit the beam ll upon which the,

block is hung. To this end the outer faceof each block is provided with two vertically spaced transverse grooves I5, each of the grooves sloping'inwardly and upwardly from the outer faces in a direction parallel to the upper and lower faces of the block. In addition, the portion of the outer' face of the block between the grooves I 5 is cut away slightly as at IB in order to provide clearance for the web of the beam I I.

The horizontal beams ll include removable sections 23 in the portions of the beamlocated between the columns Ill; Each of the removable sections 23 is advantageously secured to the fixed portions of a beam by means of splice plates 24 and studs 25, which are accessible from the outside of the wall. Removable vertical plates l9 arev advantageously secured to the outer flanges of the columns ID by any suitable means such as studs 20, in order to provide vertical passages 2| between the adjacent columns through which air may be circulated for the purpose of cooling the blocks formingthe inner wall.

In case it is desired to make use of a water wall the tubes forming such wall are placed adjacent the inner or furnace face of the blocks I 4, as shown at l8 in Figs. 1 and 2. With water tubes employed in the position shown in these figures,

it is at once apparent that the blocks [4 cannot be removed inwardly of the furn 2 and the construction in accordance with t esent inven tion permits ready removal of tile blocks outwardly of'the wall in a direction away from the water tubes.

In order to'prevent leakage of air into the furnace between adjacent horizontal rows of blocks while at the same time allowing clearance be tween the blocks of adjacent rows in order to compensate forexpansion of the blocks and also in order to facilitate removal and replacement of the blocks, transverse grooves 21 are provided in the upper and lower faces of the blocks and the From the foregoing description it will be ap- .parent that the rows of refractory blocks are firmly held in position against the horizontal supporting beams by the action of gravity and that since the blocks are supported by two flanges on each beam the maximum stress occurring onany oneplace within the block is materially reduced with consequently less chance of breakage. The clearance spaces provided between the adjacent rows of refractory blocks effectively prevent the building up of. a cumulative load on the blocks in the lower rows. The double support afforded for each block also minimizes the chance of tilting displacement of the blocks inwardly of the furnace.

The ease with which the blocks may be removed and inserted will be readily apparentfrom the drawing since to effect removal of the blocks it is only necessary to remove plates Hand one or more of the removable beam sections 23, which upon being disconnected from the fixed sections of the beams permit certain of the blocks to be removed outwardly of the wall in a direction parallel to the upper and lower faces of the blocks.

With the opening afforded by the removal of beam section'23 blocks supported'by the adjacent fixed sections of the beam may be removed by sliding them laterally along thebeam to the opening afforded by the removal of the section.

It will be understood that where packing such as that shown at 28 is employed it will be of sumciently yielding character to permit the blocks to be moved into and out of position in the wall.

As will be apparent from the drawing the structural steel necessary for the supporting framework is extremely simple and inexpensive both with respect to fabrication and with respect to erection and this simple framework provides the means for readily obtaining space for circulation of cooling air over the exterior face of the wall, a highly desirable feature for walls subjected to very high furnace temperatures. Furthermore, the wall construction in accordance with the present invention is as welladapted for use with-water walls as it is for use in furnaces where the refractory wall is unobstructed on the furnace side.

While for the purpose of explaining the inven: tion I have shown one suitable embodiment for carrying the invention into effect, it is to be understood that changes and modifications in the structure illustrated may be made without departing from the invention, the scope of whic is defined in the appended claims. v

What I claim is:

1. A furnace wall structure comprising a row of spaced vertical columns, a series of vertically spaced horizontal beams carried by said columns, and a plurality of rows of refractory blocks removably carried by said beams, said beams including detachable sections located between said columns and removable from the wall structure outwardly thereof to provide spaces between the remaining sections of the beamsfor removal of blocks outwardly of the wall.

2. A furnace wall structure comprising a row of spaced vertical columns, a series of vertically spaced horizontal beams carried by said columns, a plurality of rows of refractory blocks removably carried by said beams, said beams including detachable sections located between said columns, and splice plates for connecting said sections to the fixed portions of the beams.

3. In a water cooled furnace structure having a row of water tubes, an outer framework including a row of vertical columns and a series of vertically spaced horizontal beams carried by said columns, and a plurality of rows of refractory blocks carried by said beams between the beams and said water tubes, said beams having removable sections located between said columns which when removed provide openings between remaining beam sections for removal of said blocks outwardly of the wall structure in a direction away from said water tubes.

4. In a water cooled furnace structure having a row of water tubes, an outer framework including a row of vertical columns'and a series of vertically spaced horizontal beams carried by said columns, and a plurality of rows of refractory blocks hung on said beams, said blocks having recesses in their outer faces fitting said beams and the inner faces of the blocks being closely adjacent to said water tubes and said beams having removable sections located between said columns permitting removal of said blocks outwardly of the wall structure in a direction away from said water tubes. V

' 5. A' furnace wall structure comprising an outer framework including a series of vertically spaced horizontal beams each having two spaced upwardly and inwardly sloping flanges, and a plurality of diamond shaped blocks having recesses in their outer faces engaged by said flanges and sloping upper and lower faces parallel to "said flanges, both of said sloping faces extending from the inner face of the block to-the'outer face thereof.

6. A furnace wall structure comprising a plurality of spaced vertical columns, a series of vertically spaced horizontal channel beams attached to said columns and having inwardly and upwardly sloping flanges, a plurality of diamond shaped refractory blocks having recesses engaged by said flanges and sloping upper and lower faces parallel to said flanges, said channel beams including detachable sections located between said columns to permit withdrawal of said blocks from said wall structure outwardly thereof and means for securing said detachable sections to the remaining sections of the beams.

7. A furnace wall structure comprising an outer framework including a series of vertically spaced horizontal beams, horizontal rows of refractory blocks hung onsaid beams, and packing means between adjacent rows of blocks, said blocks having upper and lower faces extending in upwardly sloping direction from the outer faces to the inner faces of the blocks and one fractoryblock having top and bottom ma slopalam -a block being transversely I ing'from the inner face of the block to the outer I grooved to receive said packing nieana' *8; A furnace wall structure vcomprising a row of vertical columnaa series of vertically spaced horizontal beams secu'redto said columns. said.

beams each having 'two spaced upwardly and inwardly sloping flanges "and including detachable sections located between said columns, a plurality of, rows of diamond shaped refractory blocks l0 hung on saidnbeams having parallel upper and lower faces sloping parallel to said flanges from the outer faces'to'the inner faces of the blocks and outer faces recessed to flt 'saidjflanges, andverse groove therein parallel'to'the outer face packing means between adjacent rows of blocks,

said packing means being located in continuous grooves in said sloping faces and parallel to said 9.' For furnace walla'a refractory block having sloping top and bottom faces, both of said slop- I ing faces extending from the inner face of the 7 L block to the outer face thereof, and an outer facehaving a plurality of spaced transverse grooves "therein for engagement with a hanger beam. 10. For furnace walls, a diamond shaped rezs fractox'yblockhaving sloping top and bottom faces, bothof said-sloping faces extending from the inner face of th'eblock tothe outer face thereof, and an outer face having two spaced transverse grooves therein for engagementwlth a 30 hanger beam, said g ooves extending into said block in a direction parallel with said sloping" faces.

11. For furnace walis, a diamond shaped re fractory block having top and bottom faces slop- =35 ing from the inner face of the block to the outer Y face thereof and a recessed outer face providing two spaced and sloping transverse grooves parallel to said slopingfaces for engagement with a I hanger beam, the portion ofv the outer face be- 40 tween said grooves being cut backfrom the plane of the remainder of said face.

12. For furnace walls, 'a diamond shaped refacethereof, one-of said faces having a trans-j ;tion of the outer face :of theblock between said slopinggrooves being cut back from the plane of the remainder of said face.

.13. Forfurnace walls,adiamond shaped refractory blockhaving upper and lower faces sloping froin'theinner face of the block to the outer face thereof, each of saidfaces having a transof' the block and a recess in the outerfaceof the; block providing two spaced transverse grooves sloping in parallelism with said upper and lower a faces. a I I I 14. Av furnace wall structure comprising an outer framework including a series of vertically spaced horizontal'beams and a'plurality of reverse groove therein, and an outer face having a fractory blocks carried by said beams, said blocks I remaining sections of the beams for removal of blocks outwardly of the wall. v 15. A furnace wall structure comprisinga row of spaced vertical columns, a series of vertically being generally diamond shaped in side elevation 3:

spaced horizontal beams carried by said columns, f

a plurality of rows of refractory blocks carried by said beams to provide a refractory inner furnace wall, said beams including detachable sections removable from the wallstructure outwardly there- 1 of toiprovide' spaces between the remaining see- I tions of the beams for removal of blocks outward-

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