US1304392A - John c - Google Patents

Description

Patented May 20, 1919.

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J. C. SHERRY.

STEAM BOILER.

AFPUCATION FILED MAY ms.

1,304,392. Patented May 20,1919.

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UNITED STATES PATENT OFFICE.

JOHN C. SHERRY, F SEATTLE, WASHINGTON, ASSIGNOR TO SHERRY WATER TUBE BOILER 00., OF SEATTLE, WASHINGTON, A CORPORATION OF WASHINGTON.

STEAM-BOILER.

Specification of Letters Patent.

Patented May 20, 1919.

Application filed May 1. 1918. Serial No. 231.790.

1 To all whom it may concern:

nected with the steam drum by means of a front and a rear header, said headers being in turn connected by a series of staggered, inclined heating tubes, and said steam drum being connected with the lower circulating drums by means of a series of vertically disposed circulating tubes to permit a return circulation between the steam drum and the lower circulating drums and an upward circulation through the headers and the heating tubes carried thereby.

Another object of the invention is to connect the lower circulating drums with a combination blow and feed drum to permit an even distribution of the incoming feed water and to permit collection and removal of sediment whenever desired.

Another object of the invention is to eliminate as much as possible the employment of stay bolts and bracing members of any nature, and to arrange the vertical circulating tubes on each side of the furnace chamber to increase the heating area exposed to the furnace.

Another object of the invention is to provide a novel means for staggering and supporting the heating tubes to permit a free upward circulation, and to permit an even exposure of said tubes to the heat of the furnace. I

Further objects will hereinafter appear.

The invention consists of the parts and the construction and combination of parts, as hereinafter more fully described and claimed, having reference tothe accompanying drawin s, in which Figure 1 1s a side elevation of the boiler partly in section.

Fig. 2 is an end view of same, partly in section.

Referring to the drawings in detail, A indicates a steam drum and 2 and 3 a pair of lower circulating drums arranged one at each side of the boiler. Connecting the steam drum with the lower circulating drums 2 and 3 in a front header 1 and a rear header 5. The upper end of each header is directly connected to the lower half of the steam drum, while the lower end of each header is connected to the lower circulating drums, as shown at 6 and 7, respectively.

Forming a connection between the headers is a serles of inclined heating tubes, nested above each other in two tiers, as inclicated at 8 and 9. The tubes forming the lower set are staggered in relation to each other and they are also inclined in opposite directions. One row of tubes is connected at its lower end with the front header, as at 10, while its upper opposite end is connected with the rear header, as at 11. The complementary set of tubes is connected at its lower end with the rear header, as at 12, while its upper opposite end is connected, as at 13, with the front header. The respective tubes must necessarily be staggered, as shown at 1 1-, 15 and 16, to pass each other, and, due

to their inclination, always permit water to freely circulate in an upward direction from the lower circulating drums through the steam drum.

There are two sets of nested tubes, as previously stated, and they are both connected with the front and rear headers, respectively, as shown. The two sets of tubes are, of course, exposed directly to the products of combustion and an even distribution of the products of combustion is obtained by placing a baifle plate 17 between the upper and lower nested sets of tubes; that is, heat roduced by a fire passing over or supported y the grate bars shown at 18 will pass in an upward direction between the lower set of tubes 8 toward the rear header. It will then pass in a forward direction, as indicated by the arrows, over the bafile plate 17 and between the upper set of tubes 9, being finally permitted to escape through short flues or smoke tubes 19 placed in the upper portion of the front header into the bridging 20 which forms a part of the front sheeting of the boiler. The bridging or flue is divided at this point so that it may pass upwardly and around the steam drum, as at 21, directly into a stack 22. I

The smoke flues 19' are shown in Figs. 1

and 2 as being staggered in relation to the tubes 9, the respective rows of smoke flues being shown at 19 while the oppositely inclined rows of tubes 9 are shown at 9 (see Fig. 2). The products of combustion or heat produced in the furnace chamber pass constantly in an upward direction and the circulation of water between the lower drums and the steam drum is also in an upward direction, thus permitting a free flow of water and steam between the lower drums and the steam drum. Return circulation is secured by providing two sets of vertically disposed tubes, such as shown at 22. These are arranged on each side of the boiler eX- teriorly of the longitudinally extending heating tubes 8 and 9.

There is a double row of vertical tubes on each side of the boiler, such as shown at 22 and 23, the tubes on one side being connected at their lower ends with the drum 2 and at their upper ends with the steam drum A; the opposite set of vertical tubes being connected with the lower drum 3 and at their upper ends with the steam drum A. A free circulation for returning water is thus maintained on each side of the boiler and an enormous additional heating area is at the same time obtained.

The steam drum may be provided with a series 'of bafiie plates, such as shown at 25 and 26, to direct the returning water to the vertical tubes 22 and 23 and a battle drum 27 slotted in its upper side, as at 28, may be provided for the escape of steam to be utilized through the steam drum saddle flange 29. The drum is otherwise provided with a front head 30 and a rear head 31, a surface blow-01f nozzle 32, and a manhole plate 33. The shell of the drum is preferably constructed of two sections 34 and 35,. the lower section being heavier, as shown, as it is constantly exposed to the heat of the furnace chamber.

For the purpose of permitting an even dis tribution of the feed water delivered to the boiler and also for the purpose of readily removing mud and sediment whenever desired, a combination feed and blow-oif drum 40 has been provided. This drum is positioned crosswise of the boiler and is cone nected with the rear ends of the drums 2 and 3. This drum is provided with a feed nozzle ll and a blow-oif nozzle 42. This may be opened in the usual manner from time to time when it is desired to blow off the boiler for the removal of sediment and the like. The feed water entering the nozzle 41 is divided into two streams as the drum 40 is connected with the two lower drums 2 and 3. Water entering each of these drums passes endwise through the same and is again evenly distributed and divided to the front and rear headers, respectively, thus providing an ideal system of circulating and distributing the feed water delivered to the boiler.

The boiler as a whole may be inclosed by sheeting, as shown at 50, and heat-insulating material, such as asbestos or the like, may be employed in connection with the same as in standard practice. Any suitable form of furnace may be employed; that is, either coal may be burned or oil burners may be inserted through the front doors 55. As this does not form. any important feature of the present invention more reference thereto is thought 'unnecessary.

By referring to the boiler in general, it can be seen that the only stay bolts required are those which connect the front and rear plates of the headers. These stay bolts, as shown at 56, are staggered between the heating tubes, and as the inclined tubes 8 and 9 connect the front and rear headers, longitudinally extending bolts or bracing of any kind can be entirely eliminated.

Another feature of advantage is the enormous heating area obtained. First, it will be seen that both the front and rear headers are directly exposed to the heat of the furnace chamber, as is also the lower half of the steam drum; second, an enormous area is obtained by placing the tubes 8 and 9 as shown; and, third, an additional area is obtained by placing the vertical return circulating tubes on each side of the boiler. Ideal circulation of the water is at the same time obtained and an added steaming capacity and efficiency in proportion to the amount of fuel consumed are obtained when compared with other boilers. It, therefore, not only renders itself adaptable for marine use but also for stationary and other purposes.

I wish it understood that the hand-holeplates, such as shown at 60, may be placed in the front and rear headers in alinement with the tubes 8 and 9 to permit cleaning and expanding of said tubes and that the 110 materials and finish of the several parts forming the boiler may be such as the experience and judgment of the manufacturer may dictate.

Having thus described my invention, what 115 I claim and desire to secure by Letters Patent is- 1. In a steam generating boiler, a central upper steam drum, a pair of lower circulating drums arranged on opposite sides of and 120 outwardly beyond the outer sides of the upper drum, a front and a rear header, said headers each having the sides of their upper ends contracted and said ends connected to the bottom of the upper drum and'having 125 their lower corners connected to the lower drums, inclined heating tubes connected to the headers, and two series of vertical circulating tubes at each side of the boiler and forming sides for the latter, said series be- 130 ing each disposed beyond the heating tubes and at the sides of the headers and being arranged with one set in advance of the other and with spaces between the tubes of one set with which spaces the tubes of the other set register, the circulating tubes each having their upper ends curved inwardly to correspond to the contraction of the header sides and having their lower ends connected to the lower drums.

2. In a steam generating boiler, a central upper steam drum, a pair of lower circulating drums arranged on opposite sides of the upper drum a front and a rear header, said headers having their upper ends connected to the upper drum and their lower ends connected to the lower drums, inclined heating tubes connected to the headers, circulating tubes connected to the upper drum and to Copies of this patent may be obtained for five cents each, by addressing the Commissioner of la'tents v the respective lower drums, a bridging disposed over the front face of the upper portion of the front header and extending outwardly from said front face of the upper header in spaced relation thereto to form a flue extending over the front face of the front header, and smoke flues passing through the front and rear faces of the front header and extending into the flue provided by the bridging to enable the products of combustion to contact with and circulate around the upper steam drum,

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN G. SHERRY. Witnesses:

JOHN H. HERRING, W. W. HEALEY.

Washington, D. G.

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