US549012A

US549012A - Steam-boiler

Info

Publication number: US549012A
Authority: US
Publication date: 1895-10-29
Anticipated expiration: 1912-10-29

Description

(No Model.) H.S. PELL. STEAM BOILER- No. 549,012. Patented Oct. 29, 1895.

1 H I m I H H in the upper part of the boiler are water and and claimed.

of combustion.

UNrrnD STATES ATEN'I r ca.

HARRY S. 'PELL, OF AKRON, OHIO, ASSIGNOR TO THE STIRLING COMPANY,

- OF CHICAGO, ILLINOIS.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 549,012, dated October 29, 1895. Application filed. June 9,1394. Serial is. 514,085. on mas.)

fact, the Water may in some casesbe passed To all whom it may concern:

Be it known that I, HARRY S. PELL, of Akron, Summit county, Ohio, have inventedv a new and useful Improvement in Steam-Boilers, of which the following is a specification.

The object of my invention is to improve the construction and operation of water-tube boilers of the type known as the Stirling boiler, and the invention consists in the features and combinations hereinafter described In the accompanying drawings, Figure l is a vertical section taken on line 1 of Fig. 2; and Fig. 2, a vertical elevation, partly in section, taken on line 2 of Fig. 1.

In constructing my improved boiler I provide a fuel-chamber A, of any desired form and size, and preferably covered with a firebrick arch a to aidin securing complete combustion of the gases and to direct the heated gases and products of combustion into the furnace-chamber orboilerproper. Arranged steam drums B, O, and D,connected together by steam-pipes b I), while the last two, the front and middle drums, are also preferably connected together by Water-pipes c, which may be direct or circuitous, as desired. "Arranged in the lower part of the boiler is a mud-drum E, connected to the front and middle elevated drums by means of banks of tubes e c, so as to afford water communication between them. Fire-brick partitions F and F may be arranged behind the front and middle banks of tubes, respectively, so as to deflect the heated gases and products of combmion upward through the first bank of tubes and down through the second bank, which of course exposes a great portion of their length to the heated gases or products A rear lower mud-drum G is placed in the lower part of the boiler, which mud-drum is provided with a bank of tubes g, afiording water communication with the feed-water drum B. This lower drum G is preferably provided with a pipe or pipes g, which connect it with the lower drum E, so that water communication may be furnished through these two dru ms. This water communication may be direct or circuitous, as desired. In

up through a separate drum while onits passage from one mud-drum to the other.

The rear bank of tubes and mud-drum G are located in the path of the heated gases and products of combustion as they pass out through the opening orchimney H' to the smoke-stack. I provide the rear wall of the furnace with a deflecting or bafiie plate I,

which more surely compels the heated gases or products of combustion to keep in contact with the rear bank of tubes before they pass out through the smoke-stack.

In operation, the supply of water enters the upper feed-drum B through pipe I), where it may be passed over a cup-shaped disk, so as to fall gently against the surface of the water or sides of the drum, after which it passes down through the rear bank of tubes into the lower mud-drum G. WVhile passing down through the rear upper mud-drum and rear bank of tubes the water is warmed or heated to such an extent that when it enters the lower mud-drum G a portion of its sediment is precipitated or settles therein. The water then passes on through the pipe or pipes 9 into the mud-drum E, where it .takes' the course indicated by the arrows, flowing upward through the front bank of tubesinto the front water and steam drum, then through the connecting-pipes into the middle water and steam drum, and down through the middle bank of tubes into the lower mud-drum E,

and so on in circuit. This circulation being old, however, it will be understood that I do not intend to limit myself to it; or to a construction in which it is produced or secured.

The lower mud-drums are each provided with blow-off cocks '5, through which mud or go and then passing it down through the rear bank of tubes into the lower mud-drum G in such manner that it is partially heated by the escaping gases and products of com bustion, this resulting in the deposition of a large amount of sediment before the water enters the other drums and tubes and goes into general circulation, and for the feeding of this water, from which a large amount of sediment has been already removed, into a second lower mud-drum, Where it comes in contact with the heated currents of water and is raised to a higher temperature before entering the front bank of tubes, so that nearly all the remaining sediment is deposited in this second mud-drum before the water passes into the hottest part of the boiler. In this Way the formation of scale in the hottest part of the boiler is prevented.

As the essential feature of my invention consists in providing for the introduction of feed-water through an upper drum in the rear part of the boiler and in passing the water through more than one mud-drum in the lower part of the boiler, it will of course be understood that I do not intend to limit myself to minor features or details of constrnction or to the use of parts not mentioned in the claims. On the contrary, I contemplate making formal changes and adding or omitting parts or using equivalents, as circumstances may suggest or render expedient.

I claim-- 1. In a water-tube boiler, the combination of elevated steam and water drums, at lower mud drum, tubes connecting the lower mud drum with the elevated steam and water drums, a rear elevated feed drum, a rear lower mud drum, tubes connecting the feed drum with the rear lower mud drum, and means for introducing water into theelevated feed drum and passing it to the forward part of the boiler, substantially as described.

2. In a water-tube boiler, the combination of a rear elevated feed drum, a rear lower mud drum,-tubes connecting the rear lower mud drum with the elevated feed drum, a front lower mud drum, a pipe or pipes connecting the rear and front lower mud drums, elevated steam and water drums having steam and water communication with each other, and tubes connecting the front lower mud drum with the elevated steam and water drums, substantially as described HARRY S. PELL.

\Vitnesses:

P. HANSEN, R. W. HAINER.