US1789074A - Sectional furnace wall - Google Patents

Description

Jan. 13, 1931. D. s. JACOBUS ET AL 1,739,074

' SECTIONAL FURNACE WALL Original Filed Oct. 21, 1925 3 Sheets-Sheet l Fig;

f 11v VENTORS B Y M 5.

Jan. 13, 1931.

D. S. JACQBUS ET AL SECTIONAL FURNACE WALL Original Filed Oct. 21, 1925 3 Sheets-Sheet 2 INVENTORJ oal/4% Jan. 13, 1931. D. s. JACOBUS ET AL SECTIONAL FURNACE WALL Original Filed Oct. 21, 1925 3 Sheets-Sheet 5 Q Hm QW ME I? i I 11v VENTORS I 'I hjm ATTORNEKS Patented Jan. 13, 1931 UNITED STATES PATENT OFFICE DAVID S. JAOOB'US, 0F MONTOLAIB, AND NATHAN E. LEWIS, OF IPLAINFIELD, NEW JERSEY, ASSIGNOBS, BY MFSNE ASSIGNMENTS, TO FULLER LEH IGE COMPANY, A

CORPORATION OF DELAWARE SECTIONAL FURNACE WALL Application filed October 21, 1925, Serial No. 88,855. Renewed June 25, 1980. Y

Our invention relates to improvements in furnaces, and particularly the walls thereof, which are adapted to be air cooled, and will be best understood from the following description and the annexed drawings, in which Fig. 1 is a vertical section of a form of furnace chamber for steam boiler, which we have chosen for urposes of illustration of our invention; zontal section through one sid of the wall; Fig. 3 is a corresponding -ve ical section; Fig. 4 is a side view of the wall with the casing removed; Fig. 5 is an edge view of one of the tile supporting plates; Figs. 6, 7 and 8 are top, side and perspective views, respectively, of one form of a tile; Figs. 9, 10 and 11 are top, edge and front views, respectively, of a second form of tile or a sectional top tile; Figs. 12, 13 and 14 are top, edge and perspective views, respectively, of a third form of tile or a sectional ,base tile; Figs. 15 and 16 are sectional and side views, respectively, showing on an enlar ed scale the joints of the plates shown in ig. 4, Fig. 15 being a section along the line 15-15 of Fig. 16, and Figs. 17 and 18 are sectional and side views, respectively,

of a modification showing the joints of theplates, Fig. 18 being a section taken along ,the line 1818 of Fi 17, the last four views being partly bro en away.

In the drawings, reference character 1 represents a furnace that is provided with a bottom portion 2, in the shape of an inverted hollowed pyramid. The bottom portion 2 may be lined with fire-brick and provided with stretcher courses 2 oftile at intervals, and may have plates 2" on the outside thereof. A fuel burner 3 is shown near the top of the furnace. Boiler tubes 4 are shown installed nearthe top of the furnace, these tubes being mounted in headers 5 and 6 in a well-known manner. The boiler setting is mounted on pillars 7, across the top of which I-beams 8 are installed.

Fig. 1 is an illustration of. this invention shown adapted to an air cooled furnace. For this purpose a casing is installed around the outside of the lining 14 or furnace wall proper, with a space intervening between 1g. 2 is an enlarged horithe casing and the linin or wall, through which air may be asse preferably from the rear portion 0 the furnace alon the sides in a somewhat countercurrent rection to the hot products of combustion that are on the inside of the furnace. The hot air may then be passed to the burner 3 or fuel inlet, thus providing hot air for combustion purposes and, at the same time, cooling the furnace walls.

Upright supporting members 9 are located on the I-beams 8 and the flanges thereof next to the furnace are connected to channels 10 (Fig. 2). The I-beams 9 are spaced apart and withchannels 10 form an outer framework for the furnace. Plates 11 are secured by their marginal flanges to the flan es of the channels 10. A layer of heat-ins ating material 12 is applied to the plates 11 on the inside thereof. The lining or wall ofthe furnace itself is composed of tile 14, 14, 14" which are held in position by means of tileholding plates 15, shown in Fi 5, also known as bulb beam plates. T ese bulb beam plates 15 are so arranged that sections of the tile can be removed without disturbing other portions thereof. The edges of these tile are so shaped as to prevent passage of radiant heat therebetween, even when the tile do not fit perfectly against each other. A plurality of tile-supporting plates 15 are provided. The vertical edges of adjacent tiles carried by these plates contact with each other to form substantially air-tight joints and the bottom edge of each plate rests against the top edge of .a lower plate. The tile supporting plates 15 are provided with inwardly projecting bulbed vertical ribs 16. The plates 15 are also provided on the side opposite the ribs 16 with horizontally disposed fins 17 for the purpose of increasing radiation to the circulating air and to reduce the average temperature of the furnace brickwork and also to add stiffening to the plates 15. The fins aid in guiding the air along horizontal paths. One'side edge of each plate is offset, as shown at 18, so as to adapt each plate for overlapping the edge of an adjacent plate, and the top edge of, each plate is bent outwardly or offset, as

shown at 19, for a' similar pu ose. The bent out portion 19 mag be provi ed with a channel or groove 20 ig. 52 to accommodate luting material that wil seal the joint between the plates against the passage of air or hot products of combustion. A plurality of cli s 25 are provided near the vertical straig t edge of each plate 15, opposite the offset edge 18, and a plurality of similar clips 26 are providednear the lower edge of the plates. A course of luting material 27 may be provided along the lon 'tudinal joints between rowsof plates 15. T e lates 15 are, therefore',.permitted to expan and contract without [causing undue stresses or strains in adjacent plates.

A plurality of; straps 29 are installed. between the plates;15;.an d the casing, these straps being connected at one end to the channel irons 10, by means of angle irons 29', and at the other end to the plates 15. For each strap 29 a corresponding angle brace 30; igprovided, these two members forming albifacket which will hold a plate in spaced relation from, the support. Each brace 30 is secured to the opposite walls or channels 10 and plates;,15 by means of angle irons 29'; and 31. By so connecting the plates 15 to the channels 10 and I-beams 9, the plates 15 are supported on the structural members 9, the'stra'ps 29 being under compression, and the angle braces 30 under tension, as will be obvious from Fig. 3, so that the plates 15 do not bear heavlly on each otherto cause danger of the same buckling, even when loaded with the tile 14 which they carry. I g

The three forms of tile which constitute the lining of the furnace are supported on the plates 15 and are'so shaped that one section of tile can be removed and replaced without disturbing sections of tile in the ad- 'acent vertical row. The tile illustrated in igs. 6, 7 and 8 is the intermediate tile and is provided with curved vertical edges, 33 which fit each other when a pluarlity oi thesetile are assembled in horizontal rows, thus preventing radiant heat from-reaching the plates 15. This tile is also provided with vertical slots or grooves 34 along its edges to adapt the same, to be threaded or slipped over the enlarged edges of the ribs 16 on the plates 15. The upper and lower ends of the tile are made sloplng, as shown at 35, so that individual tiles resting upon a lower one, will tend to drift into snug contact with the side of the tile-supporting plate 15. The top tile is illustrated in Figs. 9,10 and 11, and is especially adapted for making the last course of tile for each section. The lower end of the tile 14' is made sloping, as indicated at 35', and the surface of the upper end is made curved, asv indicated at 33', the side edges of the tile being. made with plainsurfaces, as shown at 36. This tile is supported on a horizontal row of the intermediate tile and against the plate 15, as indicated in Fig. 3,

. so that it can be readily removed when desired.

The tile shown in Figs. 12, 13 and 14 is the base tile and is the same as that shown in Figs. 6, 7 and 8, except that its rear surface is cut away to form a shoulder 40, which shoulder is adapted to rest on the rib 21 of late 15, thus preventing the tile from dri ing too far down, as shown at 14 in Fig. 3. Its lower surface 33' is formed in a curvature to correspond with the upper surface of a tile 14, the space between the tile being filled with a layer of luting material 27. Whena sufficient number of tiles have been assembled on a horizontal row of plates 15 to cover the same, the layer of luting 27 is applied and the tile on the next higher row of plates 15 is installed in a similar manner. When it is desired to remove a. section of tile, the uppermost tile moved, those below can be removed by first sliding the same upwardly along the rib 16 and then outwardly after the upper end of the ribhas been passed.

The tile supporting plates themselves, which are. preferably made of metal, are assembledby bringing their edges together so that the oflfset portion 18 of one plate overlaps the edge of the adjacent plate, and

the CllPS 25 on the adjacent plate overlap the oflt'set edge 18, and, in a similar manner, the offset upper edges 19 of these plates overlap the edges of plates in a higher row, and the clips 26 on these plates overlap the offset edges 19 to hold the plates in assembled posi tion, so that they can slide on each other to take care of changes, due to expansion and contraction. The plates are connected to the su ports 9 by means of the straps 29 and Z- are 30, as already explained.

Figs. 15, 16, 17 and 18 indicate how the being bent outwardly and extended: into aflat portion 42 which overlaps the corners of the four plates and luting 43 is placed behind this portion 42 Also a strip of luting is inserted in the groove 20 of the offset port port, each tion 19 of the plates 15. In the modification shown in Figs. 17 and 18, the corners are protected against leakage in a similar manner, except that a separate plate 44 is held on by the screw 45, with luting 46 placed behind the same.

By forming an outer casing for the boiler by means of the plates 11 and channels 10, and applying a layer of insulating material thereto, as above described, and also by forming the plates 15 with overlapping edges and luting material along the edges and at the corners, ducts or channels are formed so as to be substantially air-tight through which air can be passed for coolmg the walls without danger of excessive leakage of the air into the furnace, even when under high pressure, as is often the case when air ducts are formed in brick settings for furnaces. While we have shown our invention as applied specifically to the vertical side walls in the embodiment shown, it is nevertheless to be understood that it is equally applicable to any other wall of a furnace and by the term wall in the claims, we intend to cover not only the vertically disposed walls, but also the walls which are generally described as floors and roofs of furnaces and by the term lining, we denote the inner surfaces of those walls, as defined above.

We claim: Y

1. In a furnace wall, a plurality of supporting members, a casing supported by said members, a plurality of plates spaced from said members and casing, means independently supporting each plate from said members, and means on each plate to hold tile thereon.

2. In a furnace wall, a support having a plurality of brackets thereon, a plurality of plates secured to said brackets and held ,thereby in spaced relation from. said suplate being supported by sa1d -,brackets independently of the other plates,

sage of air horizontally t rough said and means on each plate to hold tile thereon. 3. In a furnace wall, a support having a plurality of brackets thereon, a plurality of plates secured to said brackets and held thereby in spaced relation from said support, each plate being supported by said brackets independently of the other plates, and means on each plate to hold tile thereon, said brackets being arranged to permit pasace and horizontally disposed fins on said p ates.

4. In a furnace wall, a support, a plurality of plates spaced inwardly from said support, a plurality of brackets secured to sa1 support andextendin across said space, means securin each p ate directly to at least one of said rackets, and tile supported on said plates.

5. In a furnace wall, a support, a bracket comprising two members secured to the supinner ends of the members being secured to-- gether to complete the bracket, a late secured to the inner end of said brac st, and tile supported on said plate.

DAVID S. JACOBUS. NATHAN E. LEWIS.

port at spaced points and extending in-

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