US1256779A - Steam-generating apparatus. - Google Patents

Description

J. F. DORNFELD. STEAM GENERATING APPARATUS.

APPLICATION HLED MAY13, 1914.

Patented Feb. 19, 1918.

2 SHEETS-SHEET I INVENTOR, J 6? l A WD.OFO/ Q/J ATTORNEY WITNESSES J. F. DORNFELD. STEAM GENERATING APPARATUS.

1,256,77 APPLICATION FILED MAY 13. 1914. 19,

2 SHEETS-SHEET 2.

WITNESSES INVENTOR 4 7 Fjm n/e/J 0% ATTORNEY JOHN F. DOBNFELD, OF CHICAGO, ILLINOIS,

STEAM-GENERATING APPARATUS.

Specification of Letters Patent.

Patented Feb. 19, 1918.

Application filed May 13, 1914. Serial No. 838,249.

To all whom it may concern Be it known that 1, JOHN F. DoRNrELn,

I citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Steam-Generating Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. 1

This invention has for its object to provide an improved steam generating apparatus, and consists in the features of construction and combinations of parts hereinafter fully described and claimed.

In the accompanying drawings illustrating the invention:

Figure 1 is a view of a steam generating apparatus embodying my invention showing the boiler in side elevation and the setting and furnace therefor in central vertical longitudinal section.

' Fig. -2 is a vertical transverse section on the line 22 of Fig. -1.

Fig. -3 is a rear end elevation of the apparatus.

My invention includes an improvement in boilers per se and relates particularly to that class of boilers known as water-tube or as combined water-tube and flue boilers and has for its main object to provide a boiler of this type which is more durable than those now generally used and which affords the advantage of enabling the same to be more readily handled in shipping and setting than is usually possible with boilers of this type.

A further object of theinve'ntion is to provide a boiler-setting including the boilerfurnace so arranged and constructed relatively to the boiler as to cause the greatest heat to be applied to that part of the boiler in which, normally, the coldest water is located and in which the hot products of combustion follow the travel of the water from this point to a point in the boiler from which the same returns to the initial point, and in which, during travel of such hot products of combustion, the latter are caused to be so distributed at frequent intervals as to be brought into the most efficient relation to the heatingsurfaces to effect absorptionof heat by the water before its entry from the water tubes and boxes into the boiler shell.

A further object of the invention is to economize space occupied by the boiler with out effecting diminution of effective heating surface.

Referring now to the drawings, 1 indicates a cylindrical boiler shell of ordinary construction equipped with flues 2 in the usual manner. To the front and rear end portions of said shell 1 are secured water boxes 3 and 4 respectively, each thereof being provided at its mouth with a peripheral flange 5 secured to the bottom of the boiler by riveting or other well-known means, the opening in the boiler shell establishing communication between the same and the water box being preferably of shape and size substantially coincident with the mouth of the water box connecting therewith.

Connecting the water boxes 3 and 4 are the inclined water tubes 6 whereby under the influence of heat, circulation is established from the water box 3 to the water box 4 I thence through the boiler shell and back to the water box 3. Said water box 4 is provided with flues 7 above the level of the water tubes 6 for the passage of the hot products of combustion.

The setting for the boiler comprises the usual side walls 8 of masonry upon which the boiler shell is supported in any wellknown manner. In the instance illustrated the forward end portion of the boiler shell is suspended by means of rods 9 from a pair of parallel channel bars 10 spanning the side walls 8. The rear water box 3 is supported upon the end wall 11 of the boiler furnace which extends between said side walls 8 contiguous to the rear ends of the latter.

The boiler furnace comprises the usual fire chamber 12 equipped with a grate 13 and terminating in a bridge wall 14 upon which and said front wall said grate 13 is supported. Above the grate 13 and extending from the front wall to a point substantially vertically alined with the bridge wall is the usual arch 15 above which the water box 4: is disposed. Between the bridge wall 1 1 and the rear wall 11 of the furnace is a transverse arch 16 which supports the boiler tubes 6 between their ends, and which also partially supports a battle wall 17 consisting of fire brick or tile disposed between and carried by the lower row of boiler tubes 6, and which extends from approximately the rear end portion of the arch 15 to a point above and slightly rearwardly of-the-arch 16.

The hot products of combustion pass from the fire chamber over the bridge wall 14 under the arch 16, through the interstices between the tubes 6, above the bafiie wall 17, through the fiues 7 in the forward water box 4, and also through the space 18 between the lower end of the fire box and the arch 15, and through the space between the lower half of the boiler shell 1 and the side walls 8 into and through the fiues 2 to the chimney flue 19. o

It will be noted that the said hot gases or hot products of combustion first strike. the

water tube 6 between the baffle wall 17 and V the rear water box 3, and then pass substantially parallel with the said tubes 6 and between the latter, being gradually distributed as they move toward the forward end of the boiler shell 1 whence they passin a substantially uniformly distributed manner through the tines 2 to the chimney flue 19. Thus the said products of combustion first strike the boiler tube 6 at the point where the coldest water would naturally be found and move in the direction of flow of the water, and in eflicient heating relation to the tubes 6 as well as the boiler shell and then strike the front water box 4 and in passing through the flues therein again come into substantially intimate heating relation to the water before it passes into the shell 1 and again in passingthrough the fiues 2 so that the most intense heat follows the coldest water from its normal position in the boiler to its delivery into the boiler shell and obviously again toward the rear of the boiler where the water again passes into the box 3 and thus again through the tubes 6'.

I am aware that boiler furnaces and settings substantially identical with What. I have shown and described are not, per se, novel but it will be apparent that the style and construction of the boiler can be most efficient only in combination with a furnace and setting by means of which the hot products of combustion are caused to travel as described; My said invention, therefore, resides particularly in the novel features of construction of the boiler and to the extent indicated to the furnace and setting in combination with the particular improvements in the boiler. i

' The particular advantages resulting from the improvements are :Firstthat the water tubes are shorter than in most boilers of a similar type but the loss in potential heating surface resulting therefrom is made up by the fiues 7 in the water box 41, thus enabling me to economize in the amount of space occupied without loss of heating surface. Second-the most eifective heating surfaces are maintained nearer thesource of heat and the portion of the boiler normally containing the coldest water whereby effective heat absorption is promoted to the end that the water in the boxes 3 and 4 and tubes 6 may be very rapidly heated so as to be delivered into the shell at the highest possible temperature. Third+the products of combustion are more thoroughlv subdivided and distributed so that they may most effectively act on all heating surfaces. Fourththe economy in space and greater strength resulting from direct attachment or both water boxes to the boiler shell and also resulting from shorter water tubes renders the boiler more easily handled in manufacture, shipment and setting and obviates the necessity of expensive temporary bracing to prevent iniury during these operations.

I claim as myinvention:

1. A steam generator comprising a horizontal flue boiler, a pair of water legs depending from opposite ends thereof, watertubes connecting said water legs, a furnace including a grate, an arch above the same, there beinga passage for products of combustion between the upper face of the arch and the lower end of one of the water legs, a beam spanning the side walls of the furnace,

and tension'rods supporting one end of the boiler on said beam, thewater legat the other end of the boiler supported on the rear wall of the furnace.

2. A steam generator comprising a'horizontal flue boiler, a pair of water legs de pending from opposite ends thereof watertubes connecting said water legs, a plurality of fines in the forward water leg contiguous to the underside of the boiler, a furnace including a grate, an arch above the same,

there being a passage for products of com I bustion between the upper face of the arch and thelower end of one of the waterlegs, a beam spanningthe side walls of the furnace, and tension rods supporting one end of the boiler on said beam, the water leg at rear wall of the furnace. c 3. A steam generator comprising a llOIlthe other end of (he boiler supported on the "zontal flue boiler, a forward'and a rear water leg depending therefrom, water-tubes connecting said water legs, a furnace including a grate beneath the forward end of the boiler, an arch above the grate and extending rearwardly beneath the forward water leg, the rear end ofthe boiler supported on the rear wall of the furnace, and name in presence of two subscribing wittefnslilonbmieans slilpplortling the (ii'orfvafld 2nd nesses. ote oierwit teoweren oteor- 4 Ward Water leg free of said arch and provid- JOHN DORNFELD' 5 ing a passage therebenween for the products Witnesses:

of combustion. M. M. BOYLE,

In testimony whereof I have signed my G. M. NEVILLE.

Copies 0 this patent may be obtained for five cents each, by addressing the Commissioner of Eatents,

' Washington, Da 0.

Images