US512213A - Harry s - Google Patents

Description

(No Model.)

H. S. PELL. WATER TUBE BOILER.

Patented Jan; 2 1 894.

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HARRY S. PELL, OF AKRON, OHIO.

WATER-TUBE BOILER.

s'PECIFIGATION forming part of Letters Patent No. 512,213, dated January 2, 1894..

Application filed April 21, 1893.

T0 40% whom it may concern:

Be it known that I, HARRY S. PELL, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented new and useful Improvements in ater-Tube Boilers, of which the following is a specification.

This invention relates to water tube steam boilers, of the type composed. of a plurality of steam drumsand mud drums.

The object of my invention is to provide a new and improved construction whereby the capacity of the boiler is largely increased, and the space occupied is materially reduced, while the consumption of fuel is economized and the escaping gasesof combustion are tion. Fig. 2 is a horizontal sectional view.

taken on the line 2-2, Fig. 1. Fig. 3 is a vertical sectional view taken on the line 33, Fig. 2; and Fig. 4 is a vertical sectional view taken on the line 4-4, Fig. 2. v

In the drawings the reference numeral] indicates the steam-drum, and 2 denotes the water-drum, or, as it is sometimes termed, the mud-drum of each boiler in the battery. These drums are arranged with the steamdrum directly over the water-drums, the axes of the two being substantially in the same vertical line. The steam-drum 1 of each boiler is connected with the water-drum 2 by straight, vertical water-tubes 3, arranged in groups, banks, or gangs, all the members of which are of the same length and have their ends expanded directly into the tube-sheets i of the upper and lower drums 1 and 2. The water-drums are supported in a setting of brick 5, of suitable character, and the steam-drums have like support and inclosure in the upper part of a brick setting 8, which is usually of greater length than breadth, and preferably rectangular in form, though Serial No. 471,352. (No model.)

not necessarily so. I prefer to make the tube sheets of these drums fiat and arrange, them in substantial parallelism with each other or practically so, in order to'preserve a uniform length of the water-tubes 3, and to expose every portion of the adjacent surfaces of said drums to the heat.

The battery of boilers is composed of four steam-drums l and a corresponding number of water-drums 2, connected in the manner described. The plurality of steam-drums or drum-sections l have inter communication one with another, by means of legs, or passages 6, one or more being provided between the adjacent portions of the cylindrical walls of said drum-sections. The water-drums 2 are in like manner connected by means of similar legs 7. In both cases, these legs are arranged in the septa 8 of brick, or other suitable material, which separate the drum-sections of one boiler from those of another.

The boiler-sections are placed in pairs and the pairs are arranged in two parallel series, the members of one pair alternating with those of the other, as seen in the sectional plan View Fig. 1. The boiler-furnace 14 is placed in front, the heat passing therefrom to the foremost boiler of the series standing nearest to the rear of the furnace. The members of this series are separated by a bafflewall 25 from each other, and a baffle-tile 26 is placed about midway the water-tubes of the first boiler-section. In rear of the first series, or pair of boiler sections, is a space 27 communicating by a lateral passage 28 with the chamber in which the second series, or pair of boiler-sections is arranged, which is separated from the chamber containing the first series, or pair by a wall 29. The members of the alternating pair of boiler-sections in the second chamber are separated by a hanging baffle-Wall 30, Fig. l. Between the rear of the furnace and the nearest member of the second pair of boiler-sections is a draftspace 31, leading to the chimney or stack and between this space and the chamber containing the second pair of boiler-sections is a Wall 32, rising to a suitable height to direct the products of combustion over the water-tubes in the boiler-sections nearest the furnace.

Blow-off pipes 33 are connected to the lowest points of the water-drums 2, the drum of the rearward boiler-section being extended downward a little below the lowest points of the other drums. As the circulation is less active in the rearward section, by reason of the less degree of heat received by said rear section, I prefer to extend the water-drum a little lower, both to attract the deposition of sediment to this drum and to extend the same below the bottom of the exit-flue leading to the stack.

I may employ more than four boilers in battery, and in so doing the arrangement shown inclusive may be followed, by merely extending or duplicating the features shown. The arrangement is one which largely economizes the cubic space required and renders the heat produced by the fuel available to the maximum extent.

Having thus described myinvention, what I claim isboiler-sections of the second series, and a draft space leading to the stack between the last boiler-section of the second series and the furnace; substantially as described.

2. In a water-tube boiler, thecombination with the two alternating series of boiler'sections each section being composed of a steamdrum and a water-drum connected by vertical water-tubes, and the drums in each section being connected by legs with the corre sponding, adjacent drums in the same section, of a wall separating the two series and HARRY s. PELL.

Witnesses:

E. A. BELFORD, J. S. COSTIGAN.

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