US642802A - Feed-water heater. - Google Patents

Description

'No. 642,802. Patented Feb. 6, I900.

C. A. NELSON.

FEED WATER HEATER.

(Application filed Oct. 7, 1899.1

(No Model.)

'WW 9% m w UNITED STATES PATENT OFFICE.

CHARLES A. NELSON, OF ALEXANDRIA, MINNESOTA.

FEED-WATER HEATER.

SPECIFICATION forming part of Letters Patent No. 642,802, dated February 6, 1900.

Application filed October 7,1899.

To aZZ whom it may concern.-

Be it known that 1, CHARLES A. NELsoN, a citizen of the United States, residing at Alexandria, Minnesota, have invented certain new and useful Improvements in Feed Water Heaters, of which the following is a specification.

My invention relates to steam-condensers and feed-water purifiers and superheaters to be used in connection with steam-boilers.

The object of the invention is to provide a means for utilizing the exhaust-steam for superheating the feed-water, the former being condensed in this action.

The invention comprisesa chamber receiving the exhaust-steam, having large radiation-surfaces and means for passing the feedwater over the same in its passage to the boiler to superheat said water and condense said steam, which is then returned to the boiler.

The invention also includes the details of construction to be hereinafter described, and particularly pointed out in the claims.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a longitudinal sectional view, and Fig. 2 an end elevation.

The device is connected to the boiler in any suitable manner, the exhaust-steam being directed through a pipe 1, discharging into a steam-chamber 1, formed between the outer and inner wall 2 3 of a semicylindrical tank 4, having heads 5. The double walls are closed along the top at their longitudinal edges by aplate 4, which projects beyond the edge of the outer walls 3 and is bent upward to form a flange 6, the ends of which are closed by the heads 5 of the tank. Above the tank is a semicylindrical chamber 7, supported by pipe connections 8, leading through the plate at near each head 5. This chamber is formed of inner and outer walls 9 9 and heads 10, the space between the wall being very narrow, forming a narrow elongated chamber. This chamberisreverselyarranged relative to the tank, and the edges thereof are within the vertical plane of the flanges and a distance above the same, leaving a clear air-circulating space. The steam passes from the pipe into the chamber 1, through the pipes S into this narrow upper chamber,

Serial NO- 732,962- (No model.)

and circulates between the walls thereof.

Supported on the top of the upper chamber and extending longitudinally thereof is a pipe 10*, which forms the end of the water-feed pipe. The water in said pipe runs through. the perforations therein down over the curved sides of the wall 9 of the upper chamber, being heated by contacting therewith, and into the flanges 6, which direct the water into the tank 4, where it is further heated by the innor wall 2 of the tank. The waterin running over the wall 9 serves to partly cool the same, which causes the steam passing through the chamber to be condensed. The condensed steam then passes back through the pipes 8 and runs into a trap 11, opening into one end of the chamber 1, from which it is drawn ofi to the boiler through a branch pipe 12, coupled to the main feed-pipe 13, which leads from the tank 4 and conveys the superheated Water therefrom to the boiler. Suitable drain and blow-off pipes may be located near the bottom of the trap and tank to be used in cleansing the same of sediment. A pipe 19 leads from the top of the upper steam-chamber to carry 06 the steam not condensed by passing through the chamber described. The open space between the ends and sides of the tank 4 and the upper steam-chamber permits of free air circulation, which assists in the purifying and condensing action.

I claim 1. In combination, a semioylindrical horizontally-arranged Water-tank having an open top, and provided with double side walls with an intermediate chamber between the same, an exhaust-steam pipe leading to said chamber, a second steam-chamber arranged above the first and in communication therewith, a feed-water pipe above the second chamber, adapted to discharge the feed-water over said second chamber into said tank and connections leading from the tank and steam-chambers to the boiler, substantially as described.

2. In combination, a semicylindrical tank horizontally arranged, having double side walls forming a narrow steam-space around the water-space in said tank, a narrow semicircular chamber located above said tank and having communication with the steam-chamber thereof, said second chamber being reversely arranged relatively to the first chamber and open at its ends inside its inner periphery to provide a free air-circulating space, a feed-water pipe discharging above the second chamber and a pipe connection between the water-space and steam-chamber in said tank and the boiler, substantially as described.

3. In combination, a semicylindrical tank having double side walls forming a steamspace, an exhaust-pipe leading thereto,-a narrow semicircular steam-chamber arranged above said tank of substantially the same diameter as said tank and reversely arranged in relation thereto, said chamber forming a top to said tank open throughout to permit an unobstructed air-circulating space, a feedwater-discharge pipe located above said narrow steam'chainber, pipes opening communications between said steam-chamber and a pipe leading from the Water-space and steamchamber in said tank to the boiler, substantially as described.

4. In combination, the tank having doubled side walls forming a steamchamber, a steam-exhaust pipe communicating therewith, flanges extending along the edges of said tank, a semicylindrical chamber supported above said tank in communication with the first chamber and having its longitudinal edges within the plane of said flanges, a perforated feed-pipe supported on said second chamber and a feed-pipe leading from said tank and steam-chambers to the boiler, substantially as described.

5. In combination,a water-tank having double walls forming a steam-chamber, an ex-

Images