US2607325A - Vertical water-tube boiler with removable combustion chamber - Google Patents

Description

19, 1952 c. T. DENKER ETAL VERTICAL WATER TUBE BOILER WITH REMOVABLE COMBUSTION CHAMBER 3 Sheets-Sheet 1 Filed Dec. 15, 1948 Aug. 19, 1952 Q NKER ETAL 2,607,325

, VERTICAL WA R TU LER WITH REMOVABLE COMBU CHAMBER Filed D80. 15, 1948 5 Sheets-Sheet 2 J1 II &

, @0125. Dal/aka ([01:10 7/ll001/16 g- 1952 c. T. DENKER EI'AL 2,607,325

. VERTICAL WATER TUBE BOILER WITH REMOVABLE COMBUSTION CHAMBER 3 Sheets-Sheet 3 Filed Dec. 15, 1948 a 1 w w J V i I T. c Y 1 m 4/ 1%?0 l /H f i I I 3 wall 3 I, and the forward end portions of the top wall 28, the bottom wall 29 and the side walls 32 and 33 preferably have a suitable refractory material such as fire clay, fire brick, or the like, disposed thereon. to afford a lining L for the chamber 38. l

The heat-exchange unit 24 comprises an upper header 4!] and a lower header 42 interconnected by a plurality of water tubes 44, the water tubes affording passageways through which a liquid such as water to be heated in the boiler 26, may pass from one to the other of the headers 40 and 42. Individual fire tubes 46, are mounted in each of the water tubes 44 in spaced relation to the side walls thereof, and the fire tubes 46 extend upwardly and downwardly through the headers 46 and 42, respectively.

The header 40 is substantially rectangular in form and relatively flat, comprising a top wall 48, a bottom wall 49, a rear wall 50, a front wall and two side walls 52 and 53. In the construction of the header 40 we prefer to form the top wall 48, the front wall 5|, and the side walls 52 and 53, from a single sheet of suitable material such as, for example, sheet metal, and to form the rear wall 50 and the bottom wall 49 of a single sheet of suitable material such as, for example sheet metal, and to thereafter secure the two units together by suitable means such as welding 55.

The header 42 comprises a top wall 57, a bottom wall 58, a rear wall 59, a front wall 69 and two side walls 6| and 62 and, as a matter of fact, is substantially the same as the header 40 with the exception that the rear wall 59,'instead of the front 'wall 60 is arcuately-shaped. In fact, in the commercial production of our novel boiler 26-, the upper header 40 and the lower header '42 are'preferably interchangeable, the lowerheader 42 merely comprising a header constructed in thesame manner as the upper header 49 but being turned end over end and disposed in inverted position so that what comprise the top wall 46, bottom wall 49-, front Wall 5|, and rear wall 59 of the upper header 40 are disposed 'to afford the bottom wall 58,the top wall 57, the

rear wall 59; and the front wall 60 of the lower header 42.

The water tubes 44, Fig. 1, extend through the bottom wall 49 of the header 49 and the top wall 51 of the header 42 and are preferably connected thereto in sealing relation therewith by suitable means such as welding. Similarly, the fire tubes 46, which extend through the water tubes 44, extend through the top wall 48 and the bottom wall 49 of the upper header 40 and through the top wall 51 andthe bottom wall 58 of the lower header 42, and are connected to the walls 48, 49, 51 and 58 in sealed relation thereto by suitable meanssuch as by welding.

Suitable means, s uch'a s, for example, a circulation pump P, which is adapted to be connected to a source of supply, not shown, by a pipe or conduit 64, is connected to the longitudinal central portion of the rear wall 59 of the lower header 42 by a pipe or conduit 65, is afforded for feeding water or other liquid to be heated in'the boiler 20 into the headers 42 and 40 and the water tubes 44, the pipe 65 extending through the partition wall 34.

An outlet pipe 61 may be mounted in the upper wall 28 of the housing hand may be connected to the central longitudinal portion of the end wall 5| of the upper header 40 to afford means for feeding water from the headers 40 and 42 a manner that the headers 40' andi42 are disposed at a slight, acute angle to the horizontal therein, with the front end portions of the headers 49 and 42 disposed above the rear end portions thereof, and with the water tubes 44 rearwardly inclined at a relatively small, acute angle to the vertical. Support of the heat-exchange unit 24 in this position may be effected by a bracket 69 mounted on the partition wall 34, and on which the rear end portion of the header 4!! is disposed, and by the outlet pipe 61 and the inlet pipe 65 which extend through the top wall 23 and the partition wall 34, respectively of the housingr22. t d a An opening H, Figs. 1 and 2, is formed in the central portion of the partition wall 34, and a n exhaust duct i3 is connected thereto and-pro"- jects 'rearwardly therefrom out through the rear wall 39 of the housing 22 and affords means whereby combustion products may be fed from the combustion chamber 38 outwardly of the housing 22, as will be discussed in greater detail presently. d f The removable firebox 26 is substantially drawer-like in form, comprising a bottom wall 15., a rear wall 16, a front wall 11, Fig. l, and two side walls 18 and 19, Fig. ,2, and is mounted in the lower end portion'of the chamber 38' and rests on the :bottom Wall 29 of thehousing 22, the walls 15-19 beingpformed of suitable refractoi'y materialsuch'as fire clay, fire brick, .or'the like. The firebox 26 is 'of such'size that it may be slid inwardly and outwardly through an open: ing 8| formed in the front wall 3| ofvthe housing 22, and the walls of the firebox 26 areso constituted and arranged that when the firebox 26 is disposed in normal operating position within the housing 22, the rear wall 16, the bottom wall 15 and the side walls 18 and HI-thereof, are disposed in juxtaposition to" the partition wall 34, the bottom-wall 29, and the side walls 32 and 33, respectively, of the housing 22, and the front wall 17 of the firebox 26 is disposed in alignment with the upper portion of the front wall 31 of the housing 22. As is best seen in Figs. 1 and 2, the rear wall 16, the front wallTl and the sidewalls 18 and. 19 of the firebox 26 are so constituted and arranged that when the firebox 26 is disposed in the aforementioned normal operating position in the housing 22, the upper surface of these walls affords a ledge or shelf projecting inwardly from the adjacent corresponding wallsof the housing 22. 7 As is'best's'een in Fig. l, the rear wall 16 is somewhat shorter thanthe front wall 11 of the firebox 26' and the upper surfaces of the side walls wand 19 thereof slope downwardly fromthe upperfsur face of the front wall 11. to the uppersurface of the rear wall 16. Notches 83, 84 and 85 are formed in the inner upper edge portion of the front wall 11 and-the side walls 16 and .19, respectively, of the firebox-26 and afford ledges which are disposed in sealing engagement with the adjacent edge portions of r the header, 42 when the firebox 26 is disposed in the afor e. mentioned normal operating position- .Therear wall 16 of the firebox 26 'is of such a height that when the firebox 26 is disposedin the aforesaid normal operating position, the upper surface aoozzozs thereof is in sealing engagement with the rear edge portion of the-hea'der-H; V r

Suitable means such ;as,ffor example, an oil burner B, of a type wellknown tothose-skilled in the art, may "b'e"mounted-*in theacc'essory section 36 of thehousing'n' for feeding fuel and air into the firebox 26 during an; operation of our device. 7 9

Aligned openings 88 and 89 are alforded in the partition wall 54 of the housing Z'Z'and -the rear wall '18 of the firebox 25, respec-tively,--to'afior-d means throughwhich fuel and air may be'fed from the burner B into the firebox 26,, the oil burner B shown in the accompanying drawings embodying a nozzle EN, which is shownextending through the openings Standtfi, Fig. 1, into the firebox 26, in positio-nto feed fuel and air into the firebox 25 in a manner-wellknown to those skilled in the art; f I Two metering plates or control-plates 91' and 92, Figs. land 5, are mounted in the headers All and 42, respectively, in parallel relation to the end walls and 59. Each of the plates 9| and 92 extends entirely across the header 4G or 42 in which it i mounted to afford a partition wall therein which is in engagement with the top wall, bottom wall and'two sidewalls of the header within which it is mounted. The metering plate '9! is disposed, between the outlet pipe '91 and .the closestadjacent water tubes 44, and, likewise, the plate 92 is disposed between the inlet pipe 55 and the closest adjacent water tubes 44.

Each of the metering plates 9| and 9.2 has five openings 95, 96, 91, 98 and 99, Fig.'5,' ,formed therein which are of such predetermined diameter, and are so constituted and arranged, that efiective control of the passage of the water from the pipe 65 into the water tubes 44', and from the tubes 44 into the outlet pipe 61, is afforded in such a manner that water passing through the heatexchange unit 24 is "substantially evenly distributed among thewater tubes 44. I

With the boiler constructed in the manner shown in the accompanying drawings, .and wherein the inlet pipe 65 and the outlet pipe 61 are connected to the central portion of the rear wall 59 and the front wall 5i of the-headers 42 and 44, respectively, we have found that to effect the aforesaid even distribution of the water flow through the water tubes 44, it is desirable that the central opening 91 in the. control plates 92 and 91 be of a predetermined diameter which is considerably less than the diameter of the inlet pipe 55 and outlet pipe 61, respectively. The openings 95 and 99 which are disposed most closely. adjacent to the ends of the plates 91 and '92 of the five openings disposed therein, "preferably have a diameter somewhat larger than the opening 91 but still considerably smaller than the diameter of the pipes 65 and 61. Likewise, the intermediate openings 96 and 98, between the having an internal diameter of, substantially 2", the-opening 91 preferablyhas' adiameter ofsub stantially the two openings 95 and'99-pref erably have diameters of substantially; 1 3 and the; two openings '96 and 98 preferablyhave diametersof:substantially" 1%,;f 97? With the boiler zoeensamted in the aforementioned manner} it been found} that the fiowof water through the water tubes 4 4' is substantially equally distributed thereamongand with a minimum 'of;resistance'--to the fiW of water through the heat-exchange unit-2 4; Thus, it will be seen that, the operation of our novel boiler, water maYbe -fed' by the pump Pthrough the inlet pipe fi5jand theend wall 59 into the header 42, whence it flows-through the openings 95-99 in the'metering plate 92, the

water tubes 44 and into "the header 48'. The

' the header 4.!) down past the front. end portion central opening 91 and. the end openings 95 and 99, respectively, are preferably of a diameter somewhat larger than that of the openings 95 and 99, but still considerably less than the diameter of the pipes and 61.

As a specific example of the approximate preferred size of the openings through the plates 9! and. 92, we have found that when using headers having a depth of substantially 3", a width of substantially 14%" and a length of substantially 17%", and when using water tubes having an internal diameter of substantially 2", and fire tubes having an internal diameter of substantially 1 A", and when using inlet and outlet pipes thereof, across the outside .of the water tubes 44 and outwardly through theopening L1 and the exhaust duct 13 whence itzrnay be fed to the sph e throu h suitable means su has a smoke stack, not shown, Thus it will be seen that the water in the headersAll 4.2 and: the fire tubes are heatedbl 1: 33 Passing 1 3 ward-1y ,therethroueh and pa -ins ransversely across the outsid thereof effici nt manner- R movable panels. VI 02 .andzalll lmay be, mount d on the top wall 28 an the front wall 31 of the housing 22, if desired, to thereby facilitate cleaning of the upper portion-tot the chamber .38 and permitting ready access .t'o the heateexch'ange unit 24. f v

Also, it will be seen that the removable firebox 2-6 affords ready 'acce'ss to the lower portion of the -char'n-ber 38' and to the lower end portion of the heat-exchange unit '24 to'thereby permit ready cleaning'and repair of the heat-exchange unit 24 and thelower housing 22.

'F'romthe foregoing it will' be seen that we have I afforded a novel boilerwhich may be readily and economically constructed and wherein the flow of Water th ugh th waterftubes. thereof is evenly distributed to thereby prevent. "localized sweating of certain of thetubes a hasibeenheretofore experienced in boilers known in the art.

Also, it will be seen that we have afforded a novel boiler embodying a novel firebox which may be quickly and readily removed or replaced in the housin of the boiler and wherein ready access is afforded to the interior of the boiler for the purpose of repairing or cleaning the boiler housing or units such as the heat-exchange unit mounted therein.

Thus, while we have illustrated and described the preferred embodiment of our invention, it is to be understood that this is capable of variation and modification and we therefore do not wish to be limited to the precise details set forth, but desire to avail ourselves of such change and interior portion of the alterations as fall within the purview of the following claims. V V

We=claimz Q 1. A boiler comprising a housing, a drawer slidably mounted in said housing and movable into and out of a predetermined position in the latter, a heat-exchange unit mounted in said. housing, said heat-exchange unit "including: a. header mounted in said housing in position toengage said drawer when said drawer is disposed in said predetermined position and to afford a top wall therefor, means mounted on said housing for feeding fuel and air into said drawer for combustion therein,-means connectedto said heatexchange unit for feeding water thereinto, and means including saidheat-exchange unit for feeding combustion products from said drawer to the atmosphere. 1

-2. A boiler comprising a housing having side walls, a top wall, and a bottom wall defining a combustion area therebetween, a drawer comprising a bottom wall, and side walls projecting upwardly therefrom, said drawer being slidably mounted in said housing with said bottom wall of said drawer engaged with said bottom wall of said housing, said drawer being operable to be disposed in a predetermined position in said housing wherein said side walls of said drawer are disposed in engagement with corresponding side walls of said. housing and to be moved onsaid bottom wall outwardly. from said position relative to said housing, corresponding side walls on one side of said housing and said drawer having aligned openings formed therein, means mounted in said opening when said drawer is disposed in said predetermined position for feeding fuel into said drawer for combustion therein, and a heatexchange unit for passing water through said combustion area in heat-exchange relation to combustion products from said drawer. r

3. A boiler comprising a housing having walls defining a combustion area therein, a drawer slidably mounted in the lower end portion of said housing and having a normal predetermined position in said housing wherein said drawer affords an inwardly projecting ledge extending around said combustion area, said drawer being movable outwardly from said housing away from said predetermined position, a water header mounted in said housing in position to engage said ledge when said drawer is in said predetermined position in said housing, another water header mounted in said housing in spaced relation to said first mentioned header, means for feeding water into and out of said headers, means for feeding fuelinto said drawer .for combustion in said housing, and means including fire tubes mounted in and extending through said headers for feeding combustion products from said drawer through said headers and to the atmosphere.

4. A boiler comprising a housing having sid walls, a front wall, a rear wall, a top wall and a bottom wall, said wallsdefining a chamber therebetween, means including an upper and a lower header for passing water through said chamber, a drawer afiording a removable firebox mounted in said housing below said lower header, said drawer comprising a bottom wall and a front wall, rear wall and two side Walls projecting upwardly from said last mentioned bottom wall, said drawer being operable to be disposed in a predetermined position in said housing with said side walls, rear wall and front wall of said drawer disposed in sealing engagement with the peripheral edge portion of said lower header and to be moved outwardly therefrom into outwardly projecting relation to said housing, means mounted on said housing for feeding fuel into said drawer for combustion in said chamber when said drawer is disposed in said predetermined position, and means including conduits in said lower header for feeding combustion products from said drawer through said chamber to the atmosphere.

5. A boiler comprising a housing having wall means defining an upper and lower chamber, one portion of said housing being slidable inwardly and outwardly relative to the other pore tion of said housing, said. lower chamber being defined in said one portion, means including a heat-exchange unit mounted in said upper chamber for feeding hot gases from said lower chamber to the atmosphere, said heat-exchange unit being operable to engage said first mentioned portion of said housing when said first mentioned portion of said housing is in said inwardly disposed position to thereby afford a partition wall between said upper and lower chambers, and means for feeding liquid into said heat-exchange unit into heat-exchange relationshipwith such hot gases.

CHARLES T. DENKER. JOHN R. MOORE.

REFERENCES CITED The following references are of record in the

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