US1685962A - smith - Google Patents

Description

- W. W. SMITH Filed Dec. 15, 1923 4 sheets-Sheet. 2

Oct. 2, 1928. 3,5,962

W. W. SMITH Filed Dec. 15, 1925 4 Sheets-Sheet'I 4 Patented ct. 2, 1828.

W. SMITH, F JERSEY CITY, NEW JERSEY.

BOHJER.

Application filed December 15, 1923.

rlhis invention relates to water tube boilers and aims to provide an improved structure which can be readily erected and one which is comparatively inexpensive to build.

Two embodiments of the invention are illustrated in the accompanying drawings in which;

Fig. 1 is a side elevation o the boiler the left side of the figure being broken away to reveal interior parts;

Fig. 2 is a transverse vertical section taken Fig. 3 is aside elevation showing a modilied :torm of boiler;

Fig. 4 is a transverse section on the line 4-4 of Fig. 3;

Fig. 5 is a detailed section on the line 5-5 of Fig. 2; i

Fig. 6 is an enlarged detail showing one of the plates forming partof the baille wall.

Figs. 7 and 8 are detail views.

Referring in det-ail to the drawings the boiler shown in Figs. 1 and 2 includes lower sup-porting end walls 2 and 4, side walls 6 and 8 which enclose a heating chamber 10. This chamber is divided into two compartments 12 and 14 by a central longitudinal wall 16. The wall 16 lis provided with a pair of arched openings 18 and 20 and the end wall 4 is provided with an arched opening or port 22 which communicates with al tunnel orY flue coming from the regenerator chambers of an open hearth furnace, this boiler being adapted to utilize waste heat from steel furnaces or the like.

Located on opposite sides of the heating chamber are lower drums 24 and 26 which are l connected by means of a multiplicity of boiler tubes 28 and 30 with a drum or steam header 32 located above the central wall 16.

Steel I- beams 34 and 36 are located on opposite sides of the steam header 32 and carry on their undersides channel beams 38 and 40. Outer boiler shells 42 and 44 are secured at their upper ends to the channels 38 and 40 as shown and at their lower ends to angle plates 46 and 48 as shown. The boiler shells 42 and 44 are formed ot separate panels 53 as shown in Fig. 1 and each panel comprises an outer plate 50 and an inner plate 52 between which is located a layer of magnesia 54 or other suitable heat insulating material.

The shells 42 and 44 are arched -or bowed as best shown in Fig. 2 and assist in guiding Serial No. 880,901.

The steam header 32 is partially7 surrounded by a. hood 56 which is supported by side members 58 and 60 carried by the channels 38 and 40. This hood forms an outlet broad enough for the gases to pass through the boiler and is provided with a. ianged connection 62 for boltingto a stack connection or the like.

The end walls 64 and 66 are builtup ot boiler plates and an interposed layer ot heat insulating material 65 and a number of doors 68 are provided therein, these doors as shown in Fig. 7 being normally held closed by a releasable locking device 72 pivoted at 7() which, however, is adapted to be disconnected by any suitable means for example by breaking the pin 71 so as to permit the doors 68 to open outwardly in the event that an explosion takes place within the boiler.

Balile walls 74 and 7 6 extend transversely across the banks of boiler tubes 28 and 30, these walls meeting arched roofs 78 and 80 supported by the central wall 16. A horizon` tal plate 82 is connected with angle members 84 and 86 which assist in holding the roots 8 and 8O in position.' The plate 82 closes the space between the roofs and forms part ot the lue between the banks of tubes.

Batlle plates 88 and 90'are provided at the` upper part of the boiler and extend approximately half way across thel bank ot' tubes in a transverse direction as clearly shown. The spaces between the baliie plates 88 and 90 and the side members 58 and 60 respectively are closed by plates 92 and 94 which are secured to the channels 38 and 40.

In the boiler constructed as above described it will be seen that the gases which enter he hea-ting compartment 10 through the inlet port 22, iow to the compartments 12 and 14 thence upwardly and outwardly in a direction of the arrows a into the spaces enclosed by the arched boiler shells 42 and 44 and thence around the baiiles 7 4 and 7 6 downwardly and inwardly in the direction of the arrows Z) into the spaces above the plate 82 between the two banks of tubes, thence upwardly and outwardly above the battles 88 and 90 in the direction of the arrows c and iinally upward as indicated by arrows (Z on their way to the stack.

The joints in the shell or casing are all ot' course made air-tight and all joints are preferably closed by interposing a thin strip of asbestos a between the overlapping surfaces as shown in Fig. 8. The steam drum or header 32 is provided with suitable manholes closed by the usual cover plates 33 sccured in place by bolts 35 passing through bridge pieces 37. The water legs are provided with similar manholes which are closed in like manner by covers 25. Suitable clean out doors 27 are provided in the end walls of the boiler' and soot blowers 655 are provided which project through the ond walls GLI and 66 of the boiler, these providing means whereby the boiler can be periodically cleaned.

The baille walls above relerred to are prelierably torn'ied as shown in Figs. 5 and 6. The boiler tubes 28 ifor example are arranged in staggered relation and the baille walls are 'formed oi' a multiplicity oit diagonally disposed malleable iron plates 29 which are provided with a series oi" notches 3l and 38, the notches 31 on one side ot' the plate being staggered or offset with respect to the notches S3 on the other side ot the plate, the pitch ot' these notches corresponding to the distance on centers between adjacent boiler tube in one row. rl`he baille walls are Ylori'ned by inserting the plates 29 ed gewise between a row of tubes and then turning the plate iiatnfise. In this way it will be appreciated 'that the bailles can be readily assembled and that as they burn away they can be readily replaced.

In Figs. 3 and 4l I have shown a slightly ,modiiied type oll boiler adapted to be heated by fuel introduced into the lire box instead. of by the use of waste gases coming from a steel ifurnace or other source ot waste heat.

In this modilied iorm oiz boiler I provide a suitable lire box 96 enclosed in the masonry Valls 98 and root 100 olf the boiler. rlhe end walls 102 of the boiler as shown in Fig. 3 extend upward and terminate at 104 and support a pair of steam headers 106 and 108. The latter are joined by equalizing tubes 110 and 112, the tubes 110 being adapted to per- Imit the iiree passage oi steam from one header to the other and the tubes 112 to permit the passage of water or water and steam trom one drum to the other. lVater legs 124; and 126 similar to those shown in Fig. 2 are provided with this boiler and these water legs are connected respectively with the headers 106 and 108 by banks ot boiler tubes 128 and 130. it. side shell 142 lined with lire-brick 148 bridges the space between the water leg 124 and steam header 108 and a similar b 1ick .lined side shell 111i. bridges the space between the water leg 126 and the steam header 108.

A horizontal wall 182 closes the space between the banks of tubes .128 and 130 and baille walls 174 and 176 entend outwardly from this wall and compel the gases to travel in a circuitous path as indicated by the arrows in Fig. 4, the gases escaping to the stack through a suitable outlet conduit 156. 'Ihis boiler is provided with suitable eXplosion doors such as shown lin Fig. 1 and the water legs and the steam headers are provided with `manholes and suitable covers therefor. Both types oi boilers are provided u'ith the usual water inlet pipes 21 and steam outlet pipes 31 as shown in Fig. 1.

In both forms oi boilers illustrated, the outer arched or bowed walls by their shape and location with respect to the water legs, steam header and the baille Walls, assist in so guiding the gases that they do not encounter abrupt obstructions which would interfere with a smooth and uniform continuous tlow. Considering one side of the boiler shown in Fig. 2, the gases are tiret guided across the bank of tubes by the curved roof 7L/l and baille wall 78 and said gases strike the curved side shell 42 at such an angle that they tend to curl around and pass inward between the baille walls 74 and 88. The gases t'rom one side then meet the gases trom the other side oit' the boilerv and the stream on each side curls outward and then upward to the stack. In the design of Fig. Ll the curved side shells guide the gases in much the same manner although only one cross baille Wallis here employed and hence the gases take a less sinuous path and it is to be noted in this connection that the boiler tubes are comparatively longer when this design is used.

Though I have described with great partieularity the details of the embodiments of the invention illustrated it is not to be construed that I am limited thereto as changes in arrangement and substitution ot' equivalents may be made by those skilled in the art without departing from the invention as deiined in the appended claim.

that I claim is A boiler including in combination a pair of lower drums, a central wall lbetween the latter, a steam header above said central wall, a plurality of banks'of tubes connecting said lower drums and said steam header, baille walls extending transversely of said tubes, roots extending upwardly and outwardly trom said vcentral wall and terminatV ing at said baille walls, side walls parallel with said central wall terminating adjacent said lower druu'is, curved side shells tormin g outer ialls opposite said tubes and a casing connected with said side shells enclosing part of said steam header and having gas outlet formed therein.

In witness whereof, I have my name.

hereunto signed VILLIAM W. SMITH.

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