US1733474A - Boiler furnace - Google Patents

Description

Oct. 29, 1929. J. VAN BRUNT BOILER mamas Filed Nov. 1925 2 Shets-Shet 1 1111 111 1 1 I 1 |1|14W101/11////flfl/111/1H1111111 1111/11 h/11/1/111/1/111h111101111111011 1 /1 1 1 111 1 11 1 111111 111 11 11 11 1 11 1 1 11111111 1 1111111 1111 1 111 1111 11 11 1 1 11111 111/111111/101/n11111w4 1 111 3%?29 11 1 1 1 1 /111 111/111 1111 11- 1 unm 1 11 411 11111 1 1 Oct. 29, 1929. J, VAN QT 1,733,474

BOILER FURNACE Filed NOV. 3, 1925 2 Sheets-Sheet 2 I3 I] I II Patented a. 29, 192 9 JUNITED STATES PATENT OFFICE JOHN VAN BRUNT, OI FLUSHIN G, NEW YORK, ASSIGNOR TO INTERNATIONAL COMBUS- 'lION ENGINEERING CORPORATION, A CORPORATION OF DELAWARE BOILER FURNACE Application filed November 3, 1925. Serial No. 66,437.

This invention relates to boiler furnaces and particularly such as are intended to burn finely divided fuel, as for example, pulver ized coal.

One of the primary objects of the invention is to provide a boiler furnace which is compact and simple inconstruction and in which a large quantity of steam can be evaporated with an amount of evaporating area considerably less than now required to produce the same quantit of steam.

Another'object of t e invention has to do with the provision of improvements in the connection of various portions of the boiler. Further objects of the invention will appear in connection with the accompanying description of the best form ofmy invention now known to me, when taken in connection with the accompanying drawings, wherein nace embodying my improvements,

Fig. 2 is a portion vertical section and end elevation of the boiler furnace of Fig. 1, and Fig. 3 is a fragmentary plan section taken on the line 33 of Fig. '1.

Referring now to the drawings, the reference character A denotes the combustion space of the boiler furnace, this combustion space being primarily defined by evaporating elements. The two side walls of the combustion chamber are provided with water walls B composed of a plurality of vertically extendingtubes and the front wall isin part formed by such a water wall. C. The roof of similar water wall D, and a water screen E defines the lower portion of the combustion space of the furnace. The rear of the combustion space is defined by the banks of tubes F.

The tubes 7 in part constituting the water the lower drum 12 of the boiler.

Fig. 1 is a cross section thru a boiler furthe furnace is also composed in part by a water wall and the top water wall areipro- A relatively light sheathing 13 is carried on the tubes 11 of the water wall D, and 'beneath the water screen. E is the ash pit G, which is adapted to receive the refuse particles precipitating out of the fuel and flame stream and passing thru the screenE, which screen serves the function, among other "things, of coolingsuch precipitating ash below slag forming temperature. v

The tubes 14, of which the side water walls. E are in part formed, extend straight up thru the roof for connection into headers 15 and the lower'ends of such tubes 14 are bent so as to pass outwardly for connection into the headers 16. The headers 16, which incline upwardly from'front to rear, are connected to the drum 12 by a plurality of pipes 17 each of which is somewhat bent. These connections 17 take 011' from the header 16 .at a plurality of spaced points lengthwise thereof. A plurality of connections 18 lead from the headers 15 to the drum 9, such connections also taking off from'the headers at a plurality of spaced points. The headers 15 are suspended from the structural work 19 by means of suspension rods 20 and the steam drum 21-which'is connected to the drum 9is also'suspended. The tubes of the front wall C are suspended from the header 8, which header is in turn suspended b means of the suspension rods 22 (see Fig. 2 The header 8 being suspended and the drum 9 being fixed,

vided withlongitudinally extending fins 23, which fins are preferably welded tothe tubes,

' the tubes and the fins co-operating to constitute the water wall. The fins on the tubes 7 of the front water wall are interrupted at points to provide air inlet openings 24 leading from-the channels 25- formed by such water wall, the sheathing 26 and the divisions 27 Air enters each of the horizontal compartments 25 thru the damper controlled inlets 28. (See Figs. 1 and 3). And in traversing the space within the front wall, the

air becomes heated.

The frontrow, the middle row of tubes and completed before the passes of the vertical bank of tubes are reached. This turbulent combustion with its comparatively intense tempearture is preferred for the reason that the combustion space is defined on six sides by tubes subjected to radiant heat. These tubes, therefore, absorb heat at very high rate, so high in fact that in the absence of turbulent combustion with its concomitant high temperature, the temperature within the combustion space would be so lowered that smoking, ineificiency and other draw-backs would result. Atthe same time, by virtue of the high rate of absorption of the tubes,

' ,the boiler can be cut down in size, as can the combustion space by virtue of the turbulent combustion and short flame, whereby the size of the boiler and the size of the combustion space is but a small fraction of the size required to produce the same amount of steam according to standard practice. This also means that the drums 9' and 12 can be 10- cated closer together. Thus the ground area and the vertical height occupied is very ma,-

terially reduced, added to which the arrangement of the various elements or units constituting the boilerfurnace is much simplified.

What I'claim is:

1. In a boiler of the radiant heat type defining its own combustion space, the combination of an upper and a lower drum at the rear of the boiler, a bank comprising a multiplicity of tubes connecting said drums, side water walls in' advance of said bank and each comprising arow of upright tubes having headers at their upper and lower ends, a front water wall comprising a row of upright tubes having headers at their upper and lower ends, a roof water wall comprisinga row of tubes connected at one end to the upper drum 2. In a boiler of the radiant heat type de fining its own combustion space, the combination of an upper and a lower drum at the rear of the boiler, a bank comprising a mul-.

tiplicity of tubes connecting said drums, side water walls in advance of said bank and each comprising a row of upright tubes having headers at their upper and lower ends, a front water wall comprising a row of upright tubes having headers at their upper and lower ends, a roof Water wall comprising a row of tubes connected at one end to the upper drum and at the other end to the upper header of the front water wall, enclosing sheathing for the boiler including a roof shell carried on the roof water wall, structural work, and means for suspending the front and side walls from said structural work.

In testimony whereof, I have hereunto signed my name.

' JOHN VAN BRUNT.

and at the other end to the upper header of the front water wall, a row of spaced tubes defining the bottom of the combustion space connected at one end to the lower drum and 'at the other end to the lower header of the front water wall, enclosing sheathing for the boiler providing an ash pit and an oiftake, the headers for the side and front walls being exterior of said sheathing, structural work, and means whereby said upper headers are suspended therefrom, together with me as for admitting fuel to be burned in space in the combustion space defined by the boiler. v

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