US1794706A - Water-cooled furnace arch - Google Patents

Description

March 3, 1931. I. MOE ET AL 1,794,706

WATER COOLED FURNACE ARCH Filed Sept. s, 1928 a Sheets-Sheet 1 March 3, 1931;. MOE ET L 1,794,706

WATER COOLED FURNACE ARCH.

Filed Sept. 6, 1928 3 Sheets-Sheet 2 jijma vas' March 3, 1931. MOE ET AL WATER COOLED FURNACE ARCH Filed Sept. 6, 1928 3 Sheets-Sheet 5 j 1] 6117017 M06 0501 as A 51.77125 INGEMION MOE Ann CHARLES A. .smrrn, or rER nA MICHIGAK, assroivolas nro ARCH ooivir a vx, or MEXICO, .MYISSOURI, .aooaroaa'rion or Patented Mar. 3, '1931 ,L'IPTAK, FIRE-BRICK MINNESOTA T9OFF C i i 1 WATER-COOLED FURNACE Anon Application filed. September 6,21928. Serial No. 394,316.

, This invention relates to fire arches and; moreparticularlyto fire arches-of thedouble suspension type, such as disclosed and broad 1y claimed in Letters Patent or the United 5 States No. 1,326,752, grantedtoMichael "Lip-f tak of date December 30,1919, and'entitled Furnace arch forboilers an'd'it has for its chief object the "provision of an f i-m-proved means" for cooling the arch by an arrangement of water tubes or parts incorporated therein and arranged or adapted to be arranged to preheatwater for introduction into a Y well understoodand is not here illustrated; The furnace arch; of course, occupies the' usual position and spans the space between the sidesof'thefnrnace walls in front of and" below the ;flL] e s.- The transverse main supporting archf'be'ains 16,17 and '18 are preferably"he'avy jI beams supported attheir ends the boiler. Y a t r I Generally stated, the invent on consists of the; novel construction, combinations and arrangement of parts hereinafter described and defined in the claims. v 3 The invention is illustrated in the accompanying drawings; wherein like characters indicate like parts throughout. the several views. I 7

Referring to the drawings? i v a r i Fig 1 is a view partly in VQIti Cfll SGCiLIOII and partly in diagram, showing the invention incorporated in a double suspension'arch of the general type disclosed and claimed n the prior Liptak patent above "identified, mm

. bined with aniignition arch of the type dis- 0 closed in the Strachota Patent 1,626,982. of

date May 3,11927,1enuued Fire arch .structure;-. j Y Fig. .2 is a transversevertical section taken approximately onthe line 2-2 of Fig. 1, the

blocks of said arch being shown .in full eleon the line 2-.2 ofFig. 8;

vation;. 1 I Figs. 3, 4, 5,6 and 7 are detail views showing blocks used in. the construction of thearch illustrated in Fig. 1; Y

Fig. 8 is a view corresponding to Fig. 1, but illustrating a modified ii'orin of the arch, wherein the main arch and the ignition arch are designed as a continuous arch structure;

Fig. 2 is alsojillustrative :of ase'ction taken The arch shown in Fig. 8 is'm ade up oft-he blocks-shown in detail in Figs. 4 110 7, inclusive, and also of blocks illustrated by the detail views Figs. 9 and 10, which show certain of -theblocks inside elevation. Y

Refer-ring first to the construction ill-us-i I trated in Figs. '1 and 2:

'The numeral 11 indicates'the stokerhop-1 per structure; which is customarily equipped 1 with agate; not shown, and which delivers numeral 13 indicates fines and the numeral from the si'de walls of the furnace in a well spaced supplemental arch beams 19 are hung might be the fuel onto an endless fuelcarrier '12: The

'14 a front water leg of a tubularboiler, which: latter, as shown, is'in "communication with an underlying water drum '15, but

' known manner. A multiplicity of laterally from 'therlower, flanges of the I-beams 1:7 and. 2

l8 by inean s or hanger brackets 20. The front ends :of "th'ebeams' .19 are curved through and then turned vertically upward. The

. v The main body of'the double suspensionarch is ,madeup of upper orhanger blocks. Y '21 (Fig. 3) and "loweror under-surfacing blocks :22 (Fig.4). The upper /flanges of theiblocks 21 are hung on the lower flanges of the supplemental beams 19, while the up per flanges of the lowerblocks 22 are hung on i and are slidablfy supported by the lower Asbest flanges of. thefupper blocks 21. shown in Fig. 2, the depending shouldersof the lower blocks 22 are cut down so asto form large longitudinal air channels extending through andlongitudinally of the double,

suspension arch, and which channels, a'flt'ord Y spaces'to receive water tubes 23. The curved Y or radial portion of the arch is made up of wedge-shaped upper blocks 24 and'wedgeshaped'lower blocks 25, which, in cross section, correspond-in shape to the blocks '21 and :22, Y respectively. The blocks '24 are hung on the curved portions of the flanges of the supplemental beams 19, while the upper flanges of the lower blocks 25 are hung on the lower flanges of the upper wedge-shaped blocks 24. The vertically extended inner end portion of the double suspension arch is made up of the blocks 21 and 22 applied to the supplemental beams and connected together. in the same manner as the main arch-forming blocks, except that they are horizontally extended. These blocks, thus applied, have the tube passages so that the Water tubes 23 are extended throughthe curved and through the vertical portion of the arch. In the construction illustrated, the upper endsof the tubes 23 are connected to a water drum or header 26, while the other endsof said tubes are connected to a water drum or header 2?. .The water drum 27 may be connected to a source of water, supply, not shown, and the water drum 26, in one way or another, may be connected to the boiler,fbut, as shown, is connected indirectlythereto through awater pipe 28 that connects the drums 15and 26. V e I V An apron wall 29, of refractory material, underlies the rear or inner ends of the lower tubes 13, and this isbuiltdirectly upon cast supporting brackets 30, which, in turn, are rigidly connectedto and supported'from the I-beam '18. The space between'the top of the vertical inner end portion of the arch and the overlying apron wall 29 is filledin by filler blocks 31 that are notched soas to' clear the upper portions of thewater tubes 23. The ignition. arch, which, as stated, is

shown as of the type disclosed in the prior Strachota patent, is supported by heavy cast hanger brackets 32 that are anchored at their upper ends to the Lbeams 16 and support an outer insulating brick wall 33, an ignition.

arch proper 34, and filler blocks 35, the exact arrangement of whichis importantto the present case butis more fully disclosed 1n the said Strachota prior patent.

Obviously, the upper blocks 21 slide onto and off from thelower flanges of the beams 19 while the lower blocks 22 will slide. onto and off from the lower flanges of said upper blocks. It is important to notethat the blocks that are hung on the vertically disposed inner endsof the beams 19 are extenda ed high up and so close to the curtain wall 29 that the space can be filledin by .a single row of filler blocks 31. Also, it will be noted that the curtain wall 29 is supported entirely from the beam 18 through the shelf-forming brackets 30.

The arch just above described and particularly illustrated in Fig. 1 is of a general type or outline that may be designated as of stand ard contour. The water-circulating connections,.including the tubes or pipes-23, are a.

part of the boiler water-circulating system. The effect of placing the tubes or pipesi23 within the archand between the upper and lower blocks is, first, to cool the arch and increase the life thereof and, second, to preheat the water before it is introduced into the boiler.

' The system issodesigned that it could gen? erate some steam and, hence, can be used as a combined generator and feed water heater.

The system ofpipes should be so arranged that water would 'flow" through them without pocketing of any steamth'at maybe generated. The manner of applying the'tubes in the'a'rcliiis"highly important and it will be noted that this is accomplished simply by forming the upper "and lower blocks so that there will befsuflicient clearance between them fortheintroductionof the tubes, andv the said arch-forming blocks are of such form that the. tubes may be omitted in certain structures, without requiring blocks of a. different design.

The arches here illustrated are of the type well known to the trade as the Liptak double suspension arch. -The arch illustrated in i Fig. 8 is of a special curved design in which the main arch is continued to forinthe ignition; arch and in which the water. pipes or tubes run continuously through themain' and ignition portions of the arch. In the structure illustrated in Fig. 8, the parts designated by the characters 11,12, 13, 14, 15, 18', .20, 26,

: blocks 21, 22, 24, 25 and 31 previously described as being used in the arch of Fig. 1, but it also includes the additional blocks 32 and 33 shown in detail, respectively, in Figs. 9and 10;

These blocks 32 and 83 have the same crosssection as the blocks 21 and 22,.but they are made wedge-shaped to form that portion of the arch, Fig. 8,'that blends the main arch,

into the ignition arch. The blocks of the arch Fig. 8, like the blocks of the previously described arch', are, as already indicated, so formed that there isample clearance between the upper and lower blocks for the water pipes or tubes 23. Here attention is again called to the fact that Fig. 2 illustrates a cross-sectionof the arch illustrated in Fig. 8, as well as that of the arch illustrated in Fig. 1; So far as cooling of the arch and pre; heating of the water are concerned, the arch illustrated in Fig. 8-has allof the advantages of the arch illustrated in Fig. 1, with the additional advantage that the ignition portion of the arch will be cooled and the heating effeet on the water will be increased.

From the above description and statements made, it will be understood that the invention herein disclosed is capable of modifications as to details'of construction and arrangement of parts, all within the scope of 10 the claims hereof.

It will be noted that the filler blocks 31, in loi'igitudinal section, are wedge-shaped so that they will clear'the brackets 30 and are formed adjacent their inner faces with. upstanding shoulders that are adapted to form lap ointswith the overlying curtain wall 29.;

Thesefiller blocks may,-therefore,- be very readily replaced.

'The" upper pipes 23. can be placed in the I clearance space between the upper and lower arch-forming blocks, either with a refractory filling material of good heat-conducting ca- .pacity, or they can be used with no packin withinthe recess.

What we claim is:

said lower blocks havinglbody portions arranged in abutting relation and being so formed as to provide spaces below the lowermost portions of the upper blocks, said spaces.

being adapted to receive water pipes, and water pipes extendedin the spaces between said upper and lower blocks.

In testimony whereof we aflix our signatures.

INGEMON '7 MOE.

' CHARLES A. SMI TI-IJ l. A furnace arch comprising laterally spaced flanged metal beams and upper and lower arch-forming blocks, said upper blocks having relatively narrow depending T-" shaped portions and said lower blocks hav ing relatively narrow upwardly extended T-shaped portions slidably interlocked to' the T-shaped portions of said upper blocks, said lower blocks havingbodies being so formed as to substantially space them from said upper blocks to form longitudinal channels, and water pipes located in said channels and extended through said arch, said water pipes being each interposed between the pointof meeting of two lower blocks and the lower face of an upper block. 7 I

2. A furnace arch comprising a pluralityoverlying curtain wall, water pipes extended between the upper and lower blocks of said arch and through the vertically extended inner end portion thereof, and thence outward through the space between the inner endportion of said arch and the overlying curtain wall, the said filler blocks being notched to 7 clear the upper portions of said water pipes.

3. A group of arch-forming blocks hav ing interlocking engagement so thatlower blocks will be supported from upperblocks,

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