US2267864A - Furnace construction - Google Patents

Description

Dec. 30, 1941. l.. H. HOSBEIN 2,267,864

FURN ,'"flE CONS TRUC'TION Filed April 22, 1939 ATTORNEY.

Patented Dec. 30, 194i y FURNACE CONSTRUCTION Louis H. Hosbein, Glencoe, Ill., assignor to M. H. Detrick Company, Chicago, Ill., a corporation of Delaware Application April 22, 1939, Serial No. 269,400

1 Claim.

This invention relates in general to furnace wall construction, and more particularly to thin dividing walls of refractory material for use between separate-and adjacent furnace'units, such as oil cracking stills.

A principal object of the invention is the provision of such a thin dividing wall which includes vertically disposed, metallic tubes extending therethrough and spaced from each other as far apart as is consistent with maintaining the necessary stability of the wall.

Another important object vof the invention is the provision of insulation around the tubes employed in such a wall to materially decrease the transfer of heat from the` furnace to the tubes and to eliminate the. usual black spots which would otherwise form in the refractory portions of the wall adjacent the tubes.

A further important object of the invention is the provision of such a wall which is completely leak proof, both transversely and longitudinally thereof.

Another object of the invention is the provision of -such a wall for use between top-fired or downdraft furnace units, so that additional air for combustion purposes will be automatically supplied at the top thereof through said tubes.

Numerous other objects and advantages ofthe invention will be apparent as it is ,better understood from the following description, which, when taken in connection with the accompanyingA (Cl. 11G-e1) rest upon and are supported by a pair of I-be I5 extending transversely across the furnace units parallel with the I-beams I2.

Adjacent its upper end, which extends between the I-beams I2,.each of the tubes I3 is provided with a pair of upper and lowerring members I6 and Il surrounding the tube and having diametrically opposed flange portions extending outwardly therefrom. 'ihe main portion of each of the rings I6, I1 has a suiciently small diameter to permit sliding of the rings upon the tube between the I-beams I2. The flange portions of the rings I6, Il are of such length as to drawing, discloses a preferred embodiment thereof.

Inthe drawing,

Figure `1 is an elevational view, with parts broken away and partly in section, of a furnace wall embodying the features of the instant invention;

Fig. 2 is a transverse,` vertical section takenl substantially fon the line 2 2 of Fig. 1; and

Fig. 3 is a horizontal sectional view taken sub-k stantially on the line 3-3 of Fig.v 2.

The wall shown in the drawing, and indicated generally by reference numeral Il, is a thin dividing wall interposed between adjacent furnace units, 'such as in a battery of oil cracking stills, in which the separate units are top-fired -from a point above the I-beams I2 which-exengage above and below, respectively, the lower inner flanges of the I-beams I2. Consequently,

the rings I6, I'I are placed over the upper end of the tube I3, slid downwardly between the I-beams I2, and rotated through 90 to their position of Figs. l and 2. Bolts I8 extend through suitable apertures at oppositesides of the rings I6, I1 to clamp the same upon the lower flanges of the I-beams I2. vIn this position, the rings I6, Il function as a temporary retaining guide means for holding the tube I3'in vertical alinement with the other tubes employed. Each of the tubes I3 is provided with an outer covering I9 of paper, and the tubes are made of an alloy that will effectively withstand temperatures up to 1800.

After the several tubes I3 have been mounted in desired position, wherein they are retained by the guide rings I6, I1, refractory bricks or tiles 2| and 22 are laid upon the bottom I-beams I5 and surrounding the tubes to build up the wall I I. The bricks 2|, 22 are laid in double rows QX- tending transversely of the tube axes, witlr the -bricks of adjacent rows disposed in staggered relationship relative to each other. Asis seen in Fig. 3, each of thev bricks 2| is cutaway at 23 cept that' they are not provided `with the cutaway corner portions of the latter. The end surfaces o'f the bricks 2I and-22 are corrugated', as shown at 24 in Figs. 2 and 3, to provide vertically disposed, alternate recesses and ribs which interlock with the corrugated portions of the adjacent bricks. The Joints between the bricks extending transversely of ther wall Il are consequently completgly leakproof, and since the bricks in adjacent rows are in staggered relationship, there are no vertically disposed, straight line joints therebetween. Since the temperature at the top or upper portion of this type of downdraft furnace is greater than that obtaining elsewhere therein, the top portion of the wall II is preferably formed of a plurality of rows of vbricks 25, 26 which are similar to the bricks 2l, 22 in all respects with the exception thatthey are wider than the bricks 2|, 22 to provide a thicker wall section in this higher temperature zone. 1

After all of the bricks 2l, 22, 25 and 25 have been laid, a suitable fluid plastic material 21 is poured into the annular recesses surrounding the several pipes I3, from the top of the wall. The plastic material 21 will thus completely fill the annular pipe surrounding spaces formed by the cut-out portions 23 of the bricks to effectively insulate the pipes I3. Consequently, the transfer of heat from the refractories 2|, 22, 25 and26 to thev pipes I3 will be materially reduced, and the black spots which would otherwise form on the refractories adjacent the `pipes will be entirely eliminated. The plastic material 21 also eliminates vertical air seams in the wall I I, which, if present, would cause AtheA downward sucking of hot gases through the pipes I3. This would re- -sult because the air or gases around the tubes would be cooler and would sink,`thus 'suckinghot gases downwardly from the top of the furnace. With the elimination of this undesirable result by the plastic insulating material 21, the tubes I3 will function to supply additional air for combustion at the top yof the furnace units, since the ends of the tubes are left open and the zone of highest temperature is at the top ofthe furnace.

The tubes I3 are disposed in spaced relationshipl to each other as far apart as is consistent bricks 25, 26 and upper blocks 3| extending downwardly within such space and having side flange portions resting upon and supported by the refractories 28. The usual lower sloping walls 32 normally employed in such furnace units may then be built up in the manner shown in Fig. 2 to rest at their upper ends against the lateral surfaces of the dividing wall II.

It is thought that the invention and `many of its -attendant advantages will be understood from the foregoing description, and it will be apparent that various changes maybe made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the fornr hereinbefore described being merely a preferred embodiment thereoi.

I claim:

In a furnace, a partition comprising four parallel, horizontally extending I beams having horizontally disposed flanges and forming upper and lower pairs vertically spaced from one another, the members forming said pairs being horizontally opposed and spaced from one another, a`plurality of parallel metal tubes extending vertically between said pairs of I beams, each of said tubes having al pair of opposed notches at the lower end thereof for seating on the top anges of the lower pair of I beams 'and a collar slidably engaged on the upper end portion thereof, each of said collars having an opposed pair of horizonvtally disposed slots therein for sliding engage- `ment over the .adjacent lower flanges of said upper pair of I beams,l a wall formed ofv a plurality of blocks of ceramic material vertically supported independently of said-tubes by said lower pair of I beams, the blocks adjacent said tubes having arcuate openings therein of greater radius than the radius of said tubes whereby `to form a vertically disposed annular'channel between eachv of said tubes and the adjacent surfaces of said blocks, and a filler of plastic insulatingmaterial filling said channels.

LOUIS H. HOSBEIN.

Images