US135181A - Improvement in feed-water heaters - Google Patents

Description

G. WALES.

Feed Water Heaters. No. 135,181. I P.atented.Ian.2I,I8 '/3 I g I g I I P I I I 15 i i I I z y I i I I. o: I :0 oi i E33 I I I I 1 I I I I E :1 o: o 0: g 51 I0 E53 5 I I I I I I I I I I [1mm] III II HIDE AM. PHOTO-UTHUGRAPHIC an. N.(ossamvsls moms) first enters.

UNITED STATES PATENT QFFIOE.

GEORGE WALES, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN FEED-WATER HEATERS.

Specification forming part of Letters Patent No. 135,181, dated January 21, 1873.

To all whom it may concern:

Be it known that I, GEORGE WALEs, of the city of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Feed-Water Heater, of which the following is a specification:

My invention has for its object to produce an apparatus for heating the feed-water of boilers by the exhaust steam from the engine, and also applicable to other purposes, which is effective in operation, and of such construction as to admit of easy access to the interior for cleansing and repairs; and it consists of a series of steam-pipes of curved segmental or angular shape, inclosed in a case of corresponding form, with an intervening space surrounding the pipes for the passage of the water, and the induction and eduction so arranged that the steam and water enter and move in opposite directions, the water becoming gradually heated and leaving the apparatus at the portion where the steam is 'hottest.

In the drawing, Figure l is a front elevation of my improved heater, one-half of'the U- shaped case D being removed, showing the central course of bent tubes F in section. Fig. 2 is a side elevation showing the mode in which the two halves of the U-shaped case D and D are bolted to each other, and to the steam induction and eduction chambers A and B at the base of the apparatus. Fig. 3 is a sectional plan view through the U-shaped case D and D and the inclosed tubes F, showing the relative position and arrangement of the same, and also where the feed-"water enters and leaves the heater through the pipes K and K As represented in the drawing, A is the induction-chamber into which the exhaust steam G is the nozzle of the same by which it is connected with the exhaust-pipe of the engine. B is the eduction-chamber, and O is the nozzle of the same, from which the steam is discharged after having passed through the heater. F F are the tubes through which the steam passes, preferably bent at their centers to a semicircle, similar in shape to the letter U inverted, their ends being secured in the tube-sheets E and E. These pipes may be formed of any other segment of a circle, or may be made with angular elbows with the same effect. H is a drip-pipe connecting together the lower part of the chambers A and B, for the purpose of drawing 01f the water formed by the condensation of the steam in its passage through the heater. I is a valve which regulates the flow of the feedwater through the heater. K is the induction and K the eduction water-pipe through which the feed-water enters and leaves the heater.

The operation of theheater is as follows: The water enters the heater through the induction-pipe K at the lower part of the U- shaped case D andD directly above the tube-sheet over the chamber B, and circulates slowly through the chamber between the tubes F and their inclosing-case, escaping by the eduction-pipe K near the base,.above the chamber A. The steam admitted into chamber A through the nozzle 0 passes up into and through the tubes F, in the direction of the arrows, escaping into the chamber B at the opposite side, whence it passes off through the nozzle 0 Thus it will be seen that the water, at entering the pipe D D is first in contact with the coolest part of the tubes F, being that part of the tubes where the greatest portion of the heat of the steam has been abstracted, and that the steam and water flow in opposite directions, the heat of the former being gradually imparted to the water as it passes around its circuitous course between the tubes, until leaving the heater at the hottest pointthat is, where the steam first enters. The velocity of the moving body of water is regulated by the difference in area between outlet-pipe K and the space between the tubes F in case D D If that area be fifty times greater than that of the outlet the water will move with a velocity fifty times slower than that with which it passes out of the outlet-pipe K time being thus allowed it to absorb the greater part of the caloric contained in the steam in the pipes while moving slowly from the coolest to the hottest portion of the tubes; its inlet being on the side where the steam leaves the tubes and its outlet on that where the steam enters.

It is obvious that the water may be made to pass through the pipes and the steam through the chamber surroundingthem, the connections being suitably arranged therefor, with substantially the same effect.

The UShELPBd pipe is made in two halves, so that any defect or leakage in the tubes may be easy of access for examination and repair Without removing the heater or disconnecting any of the connections.

The course of the steam, entering by the nozzle Ohcirculating through the pipes, and escaping by the nozzle is indicated by arrows, and that of the water by the series of arrows with heads pointed in the opposite direction.

This apparatus is also well adapted for use as a condenser.

I claim as my invention The feed-water heater, consisting of the U-shaped cases D D bolted together and to the steam induction and eduction chambers A B, as described, in combination with the series of U-shaped tubes F F, tube-sheets E E, drippipes H H, and valve I, substantially as described.

. GEORGE XVALES. Witnesses:

WALTER NIcHoLs, ARTHUR J. L. LORETZ.

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