US376205A - Steam-boiler - Google Patents

Description

" (No Model.) v v w. ODEL'L.

Y STEAM BOILER. No. 376,205. Patented Jan. 10, 1888.

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MfJ/M "88888868818 UNITED STATES ATENT Erica.

\VILLlAM H. ODELL, OF YONKERS, NEW YORK.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 376,205, dated January 10, 1888.

\ Application filed January 18, 1887. Serial No. 224,668. No model.)

fo (ZZZ whom it may concern.-

Be it known that 1, WILLIAM H. ODELL, of Yonkers, \Vestchester county, in the State of New York, have invented a certain new and useful Improveinentin Steam-Boilers,of which the following is a specification.

The invention applies to all that class of steam-boilers, whether known as sectional or otherwise, in which a large partiof the heating-surface is in the form of tubes arranged to receive heat on their exteriors and to generate a current of air and steam flowing rapidly along the interiors of the several pipes, which are usually placed inclined to favor the circulation, the water and steam rising through one series of headers and the water descending through another series at the other ends ofthe tubes. It is common in this class of boilers to employ adrum which is'known as the steam and water drum, or separating-drum, which lies above the heating tubes and receives the ascending current of steam and water at one endand allows the water to descend from the other end. The steam is taken from the upper side of this steam and water drum at or near the delivery end and is led away to be used for power or for other purposes, as heating.

It is important to take the steam from the back or delivery end of the drum, so that the vigorous movement of the steam from front to rear shall aid in moving the water in that direction. As heretofore worked under such arrangement, the steam is liable to drive the water toward the rear too strongly, banking it up at the rear, so as to give water instead of steam, or to give too wet steam to the steampipe. This is more especially the case when a sudden demand is made on the boiler, as in the case of a rolling-mill engine when a large mass of iron is in the rolls and the great resistance calls for much steam to maintain the speed.

My invention is intended to avoid the difficulty and give dry steam while taking the steam from a point at or near the rear end of the drum and maintaining an active circulation of the water from front to rear of the drum. I place the drum with the receiving end low and the delivering end high. The inclination should be such that when the water is at the ordinary level it will about fill the receiving end and only allowasufficientdepth at the other end to insure the delivery of the water into the downtakes, so as to maintain a circulation.

The following is a description of what I consider the best means of carrying out the invention.

The accompanying drawing forms a part of this specification, and is a central vertical section in the plane of the axis of the drum.

Referring to the drawing, and to the letters of reference marked thereon, A is the brickwork or other substantial material inclosing a space which serves as the furnace.

B is the grate. I D represents a set of tubes of uniform size, arranged to extend through the furnace in an inclined position, with provisions for circulating the flame and hot gases from the fire thoroughly between the several tubes, so as to impart heat thereto and produce steam therein.

O are the headers through which the Water descending through the downtakes c from the delivering end ofthe drum obtains access to the lower ends ofthese tubes, and E are the headers through which the steam produced in the tubes rises, accompanied by water, which is dragged along therewith.

G is the separating-drum or steam and water drum. It is mounted inthe inclined position shown. The delivering end G which delivers the steam from its upper sideinto the steam-pipe I and delivers the water from its lower side through the downtakes 0 into the descending headers O, is higher than the other end, G, the diiferencein-level being nearly the whole diameter of the drum.

It will be understood that gage-cocks ortrycocks, or any suitable form of water-gage or other ordinary or suitable means, may be employed to determine the water-level in the boiler. This should be such that when making steam actively the water is disengaged from the steam in the liberal water-surface presented and is delivered freely into the headers 0, through which it descends; but thereis but little depth' of water at that end (the delivering end) of the drum. The other end of the drum is nearly filled with water.

The steam has the ordinary opportunity to disengage itself from the water over the whole of the surface presented. The steam flows vigorously toward the deliveringpipe I, with a strong tendency to drag the water along therewith. This tends to hold the water in the drum at an inclination. The inclination may coincide exactly with that of the axis of the drum, or it may vary somewhat one way or the other therefrom; but the inclination greatly reduces the chance that the water shall become banked up at the delivering end and shall there fill the drum so as to deliver water into the steam-pipe I.

Modifications may be made in the details. I can place side by side a number of the drums G, each connected by headers G and E to the tubes D. The tubes may be changed in size and in number. The headers may be variously formed and connected. I prefer to adopt the arrangement and proportions shown in the patent to J. B. Root, August 5, 1884, No. 302,944, except that the drum G is placed with its delivering end so much higher than the receiving end that mischief from the banking of the water in the delivery end is effectually avoided.

I claim as my invention In a steam-boiler, the tubes D and headers O E, connected together and to a drum, G, in combination with each other and with asteanidelivery connection, I, the drum being arranged with its rear or water-delivery end higher than its front or steam and water receiving end, and the steam-pipe I being arranged to take the steam from the drum at a point near the rear end, all substantially as herein specified.

In testimony whereof I have hereunto set my hand, at the city of Yonkers, New York, this 15th day of January, 1887, in the prescnee of two subscribing witnesses.

V. II. ODELL.

\Vitnesses:

Ti-ios. CADDOO, MALCOLM ACKEY.

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