US752631A - Water-tube boiler - Google Patents

Description

No. 752,631. PATENTED FEB-16} 1904. G. E. TURNER. WATER TUBE BOILER.

APPLICATION FILED MAY 7, 1900.

no MODEL.

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GEORGE E. TURNER, OF

UNITED STATES MARION, OHIO, ASSIGNOR TO STIRLING COMPANY,

OF CHICAGO, ILLINOIS.

WATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent No. '752,631, dated February 16, 1904..

Application filed May 7, 1900.

- tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the-accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

Inthe construction of water tube steamboilers one of the familiar difiiculties encountered is to provide effective connections between the water-tubes and the steam-drums and the mud-drums. It is found in practice that the drums are weakened by the numerous holes cut in their wallsto receive theends of the water-tubes and that owing to the thinness of the walls of the drums at these points it is diflicult to form a satisfactory joint by expandingthe ends of the tubes in place. To meet this difiiculty, many complicated and expensive devices have been resorted to. It has been proposed by steam-boiler designers to thicken the metal of the drums at one side in a plane flat surface and to thus permit the useof straight tubes of uniform length; but in practice this has not been found feasible, for the reason that the drums are unduly weakened by a departure from the curved crosssection. Moreover, the manufacture of this form of drum has been found unduly expensive.

My invention relates, in part, to drum construction for water-tubeboiler's; and one of its objects is to overcome the indicated. V v i In connecting elevated steam and water drums with lower mud-drums by means of banks of water-tubes it is necessary to have the tubes enter the drums on nearly radial lines, and thus some of the tubes are considerably curved or bent, usually at both'ends. This construcobjections here Serial No. 15,680. (No model.)

occupied.

A common trouble met with in the operation of water-tube boilers is the lack of facilities for removing from the boiler setting tubes which have for any reason been discon nected from their drums; also, the time, trouble, and annoyance encountered in introducing into the chamber of the boiler-settings long water-tubes.

Another object of my invention is to make provision for the ready and convenient'intrdthe chamber of the boiler-setting.

Live-steam feed-water purifiers have heretofore been located outside the boiler-setting and have been supplied with steam by pipe connections with the steam-space of the boiler.

Another object of my invention is to provide my boiler with a live-steam feed-water purifier mounted within the boiler-setting above the water-line of the steam andwater drum, whereby there may be utilized for heat-' ing the feed-water and purifying the same heat from the gases of combustion which would otherwise be wasted and whereby the purifier is made practically part of the boiler. I attain the objects of myinvention by means of the construction and arrangement of parts hereinafter described, and shownand illustrated in the accompanyingdrawings, in which.-

vation of my boiler; Fig. 2, a rear view of door 9, hereinafter referred to; and Fig. 3, a front view of door 11, hereinafter referred to.

heating-surface with a minimum of floor-space duction and removal of the water-tubes from Figure 1 is a central vertical sectional ele- In the drawings, 1 1 are the walls of the boiler-setting, within the chamber of which the single steam and water drum 2 and the single mud-drum 3 are mounted, together with the front bank of heating-tubes 4 and the rear bank of heating-tubes 5, connecting these two drums. Within this chamber at its rear upper angle is also mounted a live-steam feed.

water purifier and economizer 6. The boiler is provided with a furnace in front of the front bank of tubes near its bottom. The furnace is provided with an arch to direct the flames. against the lower part of the front bank of tubes. The walls of the portion of the drums which receives the water-tubes are thickened longitudinally, as at 2 and 3, to a greater thickness than the remainder of the drum. The interior and exterior surfaces of the thickened portions are curved in the direction of the circumference of the drums. This may be accomplished by forming the drum of a single plate having a thickened portion formed in the rolling or by forming the drum of a plurality of platessome of which are thicker than the others, or by means of suitable dies and machinery the drums may be drawn seamless and with a thickened curved portion at one side. It will be seen that the excess of metal in the walls of the drums where numerous holes are bored or cut to receive the tubes greatly strengthens the drums at this part, provides for greater area of contact, and insures a stronger and tighter joint than is obtainable with thinner metahand this without unduly increasing the weight and expense of the drum.

Between the two banks of water-tubes 4 5 is interposed a baffle plate or wall 7, consistin g of sections which are disposed successively at opposite angles in zigzag fashion. This baffle-wall rests upon the lower drum 3 and extends up nearly to the bottom of the upper drum. The flame and hot gases from the furnace are by the deflections in the baffle-wall caused to traverse longitudinally the front and rear banks of tubes, but in a zigzag or sinuous course, and thus the route traversed by the flame and gases and the period of their movement from furnace to the outlet 13 are more than doubled.

The pipes or tubes composing the front 'bank of water-tubes are but slightly curved. at bottom, but are considerably curved at top, while the tubes of the rear bank are but slightly curved at top and considerably curved at bottom. This arrangement permits the connection of a large number of tubes with the two drums and overcomes to a large degree the objections above pointed out to tubes having extreme curves at both ends.

Through the back wall of the boiler-setting is a narrow elongated vertical opening 8 of nearly thelength of the water-tubes and of merely sufiicient width to allow the convenient passage of a water-tube therethrough. This opening is covered by a door 9, as illustrated in Figs. 1 and 2. In the front wall is a like opening as long as the distance between the top of the arch and the coping of the boilermounting will permit, as at 10, which opening is also provided with a door 11. (See Figs. 1 and 3.) By means of these openings the water-tubes may be readily and conveniently introduced into or removed from the chamber of the boiler-setting.

The live-steam feed-water purifier is a closed cylinder and is provided with a series of elongated horizontal plates 6, curved in crosssection, the dished sides being uppermost. The feed-water is introduced at top through a series of openings or perforations in pipe 12 which leads in at the top of the purifier and drips from plate to plate to the water-space at the bottom. The steam-spaces of the upper drum and. of the purifier are connected by means of steam pipe 14, and their waterspaces are connected by water-pipe 12, which projects upwardly into the water-space of the purifier, as shown. The feed-waterpurifier is provided with connections and valves for throwing it into and out of service at will without interfering with the action of the boiler. The purifier and the mud-drum are also provided with the usual blow-off cocks. These parts are not shown in the drawings, as they will be fully understood without illustration or further description.

Having described my invention, what I claim, and desire to secure by Letters Patent,

1. In a water-tube boiler having-an upper and lower drum connected by front and rear banks of tubes and an inclosing wall for the drums and tubes, the combination of an elongated narrow opening in the rear inclosing wall, said opening being approximately the length of the rear tubes, a door for closing the opening,'a narrow opening located between the top of the arch and the coping in the front inclosing wall, and a door for the last-named opening, for the introduction and removal of the rear and front-tubes through the respective openings, substantially as described.

IIO

2. In awater-tube boiler, an elevated steam and water drum, a mud-drum, two banks of water-tubes connecting said two drums, and a baffle-plate interposed between said banks of tubes, said baffle-plate comprisingra series of sections, which sections are disposed at alternately-opposite angles whereby the fire and fire-gases are caused to traverse azigzag or sinuous path along said tubes.

3. In a water-tube boiler having a vertical chamber within an inclosing wall and a furnace at the bottom and on one side of and opening into the vertical chamber, the combination of a single elevated steam and water drum at her, the two drums standing verticalone above the other, a front bank of tubes connecting the two drums and in which the water ascends to the elevated steam and water drum from the lower mud-drum, a rear bank of tubes connecting the two drums and in which the water descends from the elevated steam and water drum into the lower mud-drum, a bafile plate or wall interposed between the two banks of tubes, and a live-steam feed-water purifier disposed wholly within and at the upper rear angle of the vertical chamber adjacent to the elevated steam and water drum and subject to the heat within the chamber and having a steam connection at the top for admitting steam from the elevated steam and water drum to act on and heat the supplied water and having a water connection at the bottom leading into the elevated steam and water drum below the level of the .water in the drum for discharging heated water from the bottom of the purifier into the lower portion of the elevated steam and water drum and have the admitted heated water descend by the rear bank of tubes chamber within an inclosing wall and a fur-' nace at the bottom and on one side of and opening into the vertical chamber, the combination of an upper steam and water drum at the top of the vertical chamber, a lower mud-drum at the bottom of the vertical chamber, the two drums standing vertically one above the other, two banks of tubes connecting the drums, and a live steam feed-water purifier disposed wholly within and at the upper rear angle of the vertical chamber adjacent to and at the rear of and above the horizontal center of the elevated steam and water drum and subject to the heat within the chamber, and having at the top a steam connection for admitting steam from the elevated steam and water drum to act on and heat the supplied water and having a water connection at the bottom leading into the elevated steam and water drum below the level of the water in the drum for discharging heated water from the bottom of the purifier into the lower portion of the elevated steam and water drum and have the admitted heated water descend by one of the bank of tubes into the lower mud-drum, substantially as described.

6; In a water-tube boiler having a vertical chamber within an inclosing wall and a furnace at the bottom and on one side of and opening into the vertical chamber, the combination of a single elevated steam and water drum at the top of the vertical chamber, a single lower mud-drum at the bottom of the vertical chamber, the two drums standing vertically one above the other, a front bank of tubes between the two drums and in which the water ascends to the elevated steam and water drum from the lower mud-drum, a rear bank of tubes between the two drums and in which the water descends from the elevated steam and water drum into the lower muddrum, 2. live-steam feed-water purifier disposed wholly within and at the upper rear angle of the vertical chamber adjacent to and at the rear of and above the horizontal center of the elevated steam and water drum and subject to the heat within the verticalchamher, a valve-controlled pipe between the elevated steam and water drum and the purifier admitting steam to the purifier from the elevated steam and water drum to act on and heat the supplied water in the purifier, a valvecontrolled pipe between the elevated steam and water drum and the bottom of the purifier leading into the elevated steam and water drum below the level of the water in the drum for discharging water from the purifier into the elevated steam and water drum to descend by the rear bank of tubes into the lower muddrum, substantially as described.

7. In a water-tube boiler having a vertical chamber within an inclosing wall and a furnace at the bottom and on one side of and opening into the vertical chamber, the combination of a single elevated steam and water drum at the top of the vertical chamber, a single lower mud-drum at the bottom of the vertical chamber, the two drums standing vertically one above the other and the lower muddrum having a less capacity than the elevated steam and water drum, a front bank of tubes between the two drums and in which the water ascends to the elevated steam and water drum from the lower mud-drum, a rear bank of tubes between the two drums and in which the water descends from the elevated steam and water drum into the lower mud-drum, a live-steamfeed-water purifier disposed wholly within and at the upper rear angle of the vertical chamber adjacent to and at therear of and above the horizontal center of the elevated steam and water drum and subject to the heat within the vertical chamber, a valve-controlled pipe between the elevated steam and water drum to act on and heat the supplied water in the purifier, a valve-controlled pipe between the elevated steam and water drum and the bottom of the purifier leading into the elevated steam and water drum below the level of the Water in the drum for discharging water from the purifier into the elevated steam and water drum to descend by the rear bank of tubes into the lower mud-drum, substantially as described. 10

In testimony whereof I aflix my signature in presence of two witnesses.

GEORGE E. TURNER.

Witnesses:

D. R. CRISSINGER, FRENCH CROW.

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