US1032505A - Hot-blast stove for heating air, steam, or other gases, and brick therefor. - Google Patents

Description

F. C. ROBERTS. l HOT BLAST sTovE EOE HEATING AIE, STEAM, 0E OTHER GASES, AND BRIGK THEEETOR.

APPLICATION FILED MARJEO, 1912. 1,032,505.,

Patented July 16, 1912. C A

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W/I I WIG. 12

and permanent',

FRANK, C. ROBERTS, OF-WYNNEWOOD, PENNSYLVANIA,

EGT-BLAST STOVE FDR HEATING AIR, STEAM, OR OTHER GASES, AND

Specification of Letters Patent.

BRICK THEREFOR.

Patented July i6, il9l2.

Application tiled March 30, 1912. Serial No. GSTCBM.

cation, taken in connection with the accompan ing drawings.

y invention relates to hot blast stoves of the character used in heating the air for blast furnaces and in which fire brick surfaces are arranged to act as regenerators for absorbing and giving od heat. These regenerators are built with tire bricks so ylaid as to form a series of vertical fines through which the highly heated gases are drawn by the chimney draft; the heat of the gases is, in this process, partly absorbed by the brick work. When the brickwork has become, highly heated, the necessary valves are operated whereby the flow of gases is discontinued and air or other medium forced through the fines composing the regenerator; in this manner the heat absorbed by the brickwork in the first described process is given 0E to, or absorbed by, the air in the second described process.

Manifestly the above described processes submit the brickwork to alternate heating and cooling, and consequently to alternate expansion and contraction. Further,.it is well known that thefheated gases in their passage through the regenerators necessarily carry a considerable quantity of dirt, which if allowed to accumulate in the flues impairs the heating capacity of the regenerators by reducing the amount of brick surface brought into contact with the heated gases. As a result, it is essential that thebrickwork of the regenerators be constructed in as solid form as possible in order that the tlues shall maintain'their original shape and thusprevent the formation of ,projecting surfaces upon which the dirt con take place without materially` affecting the original shape and alineinent of the flues. I attain this object by the designs and arrangements of brickwork illustrated in the accompanying drawings in which- Figure 1 is a plan of a portion of a regenerator; Figs. 2 and 3 are sections through the regenerator on the planes indicated; Fig. l shows the brick used in the regenerator illustrated in Figs. l, 2 and 3. Fig. 5 is a plan of a portion of a regenerator built with bricks of a different design from that shown in Fig. 4; Figs. 6 and 7 are sections through this regenerator on the planes indicated; Figs. 8 and 9 yshow the shape of the bricks used in the construction illustrated in Figs.v

5, 6 and 7. Fig. l0 is a plan of aportion of a regenerator which may be constructed by the use alone of the brick shown in Fig. 8; Figs. l1 and l2 are sections through this regenerator on the planes indicated. Fig. 13 shows one of the walls of a regenerator constructed with another forni of brick.

Similar letters refer to similar parts throughout the several views.

As indicated in the drawings the regenerator fines O are formed by the intersection of two series of parallel walls, the one series P, Q, P, Q., being normal to the other series R, S, It, S.

rllhe individual bricks forn'iing the various constructions illustrated are provided at their two ends with either projections or recesses or both. The brick used (sce Fig. 4) in the regenerator shown in Fig. l is `p1ovided .with a projection at one end and a recess at the other end. The brick' used in the regenerator shown in Fig. 5 are of two types (see Figs. 8 and 9); that shown in Fig. 8 has a projection at each end while that shown in Fig. 9 has a recess in each end. In constructing the regenerator shown in Fig. l0, a brick with projections at each end is employed .(see Fig. S).

ln the various designs of brick illustrated the projectionsl and recesses extend 1n all l located below the top surface or above the lowersurfaee of the brick and that it is not essential that the projections and recesses be located symmetrically in reference to the central axis of the brick which passes lthrough the two ends but that the projections and recesses may be arranged as indi-v body of the brick. Two means are shown to meet this requirement as illustrated in Figs.

4- and 9.

In the construction shown in Figs. 1, 2, 3, 5, G, 7 and 13 the bricks are laid in horizontal courses extending across the regenerator. If it is thought desirable the construction shown in FigssllO, l1 and 12 may be used wherein, the'horizontal joints between the brick in each alternate parallel wall of each series occur one haltI course or height of brick below or above the horizontal joints in the adjacent parallel walls of the same yseries. Y

Having thus described my invention, what I claim and desire to cover by Letters Patent isi l. In a hot blast stove regenerator, a flue structure composed of bricks provided' with projections and recesses in their two`ends the projections and recesses between abut-v of' the bricks, the projections and recesses in theiry ments extending across the width horizontal direction being equal to not greater than Aonehalt the breadth of the bricks, the projections and abutments of the recesses having neither their uppermost nor lowerniost surfaces in the same planes as respectively the upper' and lower surfaces of the main body otV the brick, and the vertical height of the recesses being greater than the combined vertical height of the projections engaging therewith. Y.

2. In a hot blast stove regenerator, interlocking bricks, having projections vertically not greater than one half the height of the brick and horizontally not greater than one halt' the thickness of the brick, and recesses vertically greater than the engaging projections, abutments for the recesses, the topmost and bottommost faces of the projections and the abutments of the recesses being in planes lower and higher respectively than the top and bottom faces of the bricks.

3. Interlocking bricks, having projections and recesses at their ends, the vertical height of the recesses being greater than that of the projections and abutments, for the recesses, the uppermost and lowermost surfaces of the abut-ments being below and above the uppermostl and lowermost surfaces of the bricks respectively.

4. Interlocking bricks, having at their ends projections considerablyl removed from their upper and lower edges, and recesses correspondingly removed and abutments for the recesses, the uppermost and lovermost Surfaces of the abutments being below and 'above the uppermost and lowermost surfaces of the bricks respectively.

5.v Interlocking bricks, havingf at their ends projections equidistant from top and bottom of the bricks and recesses equidistant from top and bottom of the bricks whose vertical height is more than the vertical yheight 4of the projections and abutments for the recesses, the uppermost and lowermost surfaces ot the abut-ments being below and above the uppermost and lowermost surfaces of the bricks respectively.

G. In a brick, a projection at one end of the brick equal in thickness to the thickness of the brick, horizontally not greater than half of the thickness of the brick, vertically less than halt the vertical height of the bricks, its upper surface being below the 'top surface of tho brick and its lower surface above the lower surface of the brick; at the other end of the brick abutments forming a recess therebetween corresponding to the projection but greater vertically than the projection, the uppermost and lowerinost surfaces of the abutments being respectively below and above the topy and bottom `Sur faces of the brick.

Signed. at Philadelphia, this 28th day of March 1912.

FRANK C. ROBERTS.

Witnesses I J. DoNALnsoN PAx'roN, RANDOLPH I-I. MILLER.

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