US1966482A - Furnace - Google Patents

Description

July 17, 1934.

C. BOLLINGER FURNACE Filed April 25 1950 2 Sheets-Sheet 4 agjw W 44? July 17, 1934. c, BQLLINGER 136%,4-82

FURNACE Filed April 25. 1930 2 Sheets-Sheet 2 p" 1 1 2. g s M Patented July 17, 1934 FURNACE Charles Bollinger,

Chicago, lll.,

asaignorto Western Electric Company, Incorporated, New York, N. Y a corporation of New York.

Application April :5, 1930, Serial No. 447.206 2 Claims. (cl. lie-so) This invention relates to furnaces, and more particularly to furnace wall and arch construction.

An object of the invention is to increase the 'l'emciency of furnaces by so constructing the arches of furnaces as to produce more complete combustion of the fuel. I

In accordance with one embodiment, the invention contemplates the provision of a refractory to ignition arch convex in shape and connected through a body of refractory mastic cement with an upwardly inclined straight roof arch which terminates in a convex main arch. The main arch extends inwardly beyond the front wall of is the furnace and then is curved and joined to the front wall of the furnace at an upper point. The main arch is also composed of refractories and has at its upper end outwardly extending portions supported -by a h shelf carried by flanged members which engage the refractories. The inwardly extending convex main arch forms an air distributing duct and is apertured at spaced intervals to permit air under pressure to be fed therethrough to the interior of the furnace and in like manner the body of mastic positioned between the straight roof arch and the vertically extending portion of the ignition arch is apertured to permit steam to be supplied to the flre adjacent the ignition arch.

A better understanding of this invention will be had by referring to the following detailed description, when taken in conjunction with the accompanyins drawings, wherein 1 35 Fig. 1 is a sectional view taken through the 4 front wall and arches of a furnace embodying the features of the invention;

Fig. 2 is a fragmentary vertical sectional view taken on the line 2-2 of Fig. l in the direction of the arrows;

Fig. 3 is a fragmentary perspective view of one of the castings of the upper main arch;

Pig. 4 is a fragmentary perspective view of one of the castings of the lower main arch;

Fig. 5 is a sectional view of the flanged and grooved connection taken along the line 5-5 of Fig. 4, and

. Fig. 6 is a fragmentary perspective view of one of the castings of the ignition arch.

Referring now to the drawings, wherein like reference characters designate the same parts throughout the views, the numeral '1 designates a side wall in which are supported a plurality of I-beams 8, 9, 10, ll, 12, and 13, which serve It to support a front wall, a main arch, a roof arch, and an ignition arch designated generally by the numerals 14, 17, 18, and 19, respectively.

The front wall is the usual front wall of a furnace and comprises a plurality of half brick refractories suitably secured to upwardly ex- .9 tending castings 21 which are supported upon a lintel 22 which rests upon the I-beams 8 and 9. Adjacent the lintel 22 the outer surface of the front wall is formed of heat insulating brick 23 upon the top row of which a channel 24 rests. This channel extends transversely of the front of the furnace and supports a heat insulating composition 27 and is also adapted to receive a lug 28 formed on the casting 21 to permit the casting to move transversely of the front of the 70 furnace when so urged by expansion and contraction of the refractories, but to restrain it from movement longitudinally of the furnace, thereby to hold the refractories in a predetermined position. In a like manner, a Z-bar 29 extends transversely of the front of the furnace and provides a surface which may be engaged by a lug 30 formed on the casting 21. Positioned between the refractories 20 and the insulating composition 27 is a wall of insulating brick 31.

The main arch 1'1 connects with the lower extremity of the front wall 14 at 32, is inclined inwardly therefrom, and terminates to form a convex arch. This arch 17 is composed of grooved half brick refractories 33 supported upon castings'34 and 37 which are secured to the I-beams 9 and 10. The casting 34 is provided with a flange 38 secured to the I-beam 9 in any suitable manner, such as by bolts and has formed on the opposite edge thereof transversely extending flanges 39-adapted to extend into the grooves of the half brick refractories. The grooves of the half-brick refractories conform to the contour of the flanges 39 so that two of the refractories cooperating will substantially surround the flange and be held in place thereby. Adjacent the lower and inwardly extending portion of each of the castings 34 a shelf or lintel 40 is provided and serves to support the refractories which have been positioned about the flanges 39. The refractories 33 from a point 41 to a point 42 will thus be secured to and supported by the casting 34 and a layer of refractories 43 may be positioned upon the top row of refractories 33 to support a plurality of refractories 44 for interconnecting the arch with the front wall 14. The structure hereinbefore described forms the inwardly extending portion of the convex main arch 17.

The lower and upwardly extending portion of the main arch 17 is supported'by the casting 37' which has transversely extending flanges 47 similar to the flanges 39 of the casting 34 and support half brick refractories es in the same manner as described in connection with casting 34. However, the casting 3? is not secured directly to the I-beam 10 but has on its outer surface a flange 48 which fits into a groove 49 formed in a casting 50 which is provided with a flange 51 secured in a suitable manner, such as by bolts to the I-beam 10. The refractories 46 are thus supported by the casting 37 from a point 52 to a point 53 and a layer of refractories 54 similar to the refractories 33 is positioned upon the refractories 46 above the point 52 and serve as keystones. The upwardly extending roof arch 18 extends in a straight line from the point 53 to a point 55 and is formed of half brick refractories 56 suspended from the I- beams 10, 11, and 12 by an arrangement of the castings to be described in detail hereinafter. The I- beams 10, 11, and 12 are held rigidly in the positions shown by means of a plurality of I- beams 57 and 58 positioned therebetween and secured thereto by angle plates 59, and have slidably positioned upon their lower flanges a plurality of castings 60, which extend between the I- beams 10 and 11, and 11 and 12. The castings 60 have flanges 61 formed thereon about which grooved portions of half brick refractories 56 are positioned, the upper surface of the grooves in the refractories engaging the flanges 61 to support the castings. The refractories, when so arranged upon the castings 60, may in expanding or contracting due to changes in temperature within the furnace, move longitudinally of the castings, and any expansion transversely of the furnace will be cared for by the slidable mounting of the castings upon the I- beams 10, 11 and 12.

The left hand row of half brick refractories 56 of the group forming the upwardly extending roof arch 18, engages a body of refractory mastic cement supported upon a row of refractory bricks 62 and held in position by a casting 63, held in place in a manner to be described hereinafter. Secured to the I-beam 12 are a plurality. of supporting members 64 having flanges 67 at the lower ends thereof for cooperating with the castings 60 to support the left handlFig. 1) row of half brick refractories in the roof arch 18. A slot 68 is formed in the left hand surface of each of the supporting members 64 in which are positioned flanges 69 forming parts of the castings 63, thereby to support the upper end of the castings 63. Intermediate the ends of the castings 63 there are provided lugs 70 for slidably engaging the I-beam 13, which cooperates with the supporting members 64 to position the castings 63.

Formed on a lower curved surface of the casting 63 is a flange 71 upon which the half brick refractories 65 forming the ignition arch are supported. At the lower left end of the castings 63 a. vertically extending stop member 72 is formed against which the lower left hand (Fig. 1) half brick refractory 65 rests thereby to hold the refractories forming the ignition arch 19 in the position shown. The front wall of the furnace adjacent the ignition arch has an outer wall formed of insulating material 73 which is held in place by the I-beam 13, and upon the upper surface of which a housing 74 is positioned, which may be utilized as a steam masses 1 chamber through which steam. may be d to a series of apertures or passageways 76 formed in a block of refractory mastic cement 77 for the purpose of admitting live steam to the ignition chamber to aid in combustion of the fuel.

Fuel may be advanced into the furnace at 76 by any suitable chain grate mechanism (not shown), and steam directed into the combustion gases generated at the ignition arch to assist in the combustion of the fuel. For an analogous purpose, air under pressure may be admitted through the main arch from 9. chamber 79 formed by the lintel 22, III-beams 8 and 9, and a plate 86 positioned between the I-bcam 8 and the I-beam 10. The air admitted into the chamber 79 may be directed through apor tures or passageways 81 in the half brick re fractories 46, forming the main arch. The air and steam so admitted to the combustion chamber creates a turbulent action in the gases of combustion to break up gas pockets and so disturb the gases as to result in a more complete combustion thereof.

From the foregoing description it will be apparent that a more extensive fire arch may be provided in a limited space than those heretofore known and an increase in the temperature of the furnace may be permitted without damaging the walls and arches of the furnace. Although a specific form of the invention has been described hereinbcfore, the invention is to be limited only by the scope of the appended claims.

What is claimed is:

1. In a furnace, a. plurality of flanged metallic members extending transversely thereof, a plurality of metallic members having a portion thereof slidably engaging cooperating flanges of the flanged members, refractory members suspended from the slidably positioned metallic members and forming a roof arch, a transversely extending member positioned above the inner end of the roof arch, a front wall supported by said member, said member carrying refractory material supporting brackets and the adjacent one of said transverse roof arch supporting members carrying flxed brackets, refractory material supporting brackets removably connected to said flxed brackets by means of groove and flange connections, each of said refractory material supporting brackets having flanged portions slidably receiving a tier of recessed refractory blocks, said tiers of blocks constituting a main arch forming a continuation of the roof arch and Joining the lower portion of the front wall.

2. In a furnace, a plurality of flanged'metallic members extending transversely thereof, a plurality of metallic members each having a portion thereof slidably engaging cooperating flanges of the flanged members, refractory members suspended from the slidably positioned metallic members and forming a roof arch, a transversely extending member positioned above the inner end of the roof arch, a front wall supported by said member, notched refractories for the upper and lower tier of a main arch, a plurality of brackets secured to said last mentioned transverse member, said brackets having upwardly extending flanged portions receivable in the notches of the refractories and substantially horizontal portions serving as platforms for supporting the upper tier of the refractories of the main arch, one of said transceivin: the lower tier of refractories for the main arch forming a continuation of the root arch and joining .the lower portion of the upper tier of the main arch.

CHARLES BOLLINGER.

ESQ

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