US629723A

US629723A - Feed-water heater and purifier.

Info

Publication number: US629723A
Application number: US69498998A
Authority: US
Inventors: George W Laughton
Original assignee: Individual
Current assignee: Individual
Priority date: 1898-10-31
Filing date: 1898-10-31
Publication date: 1899-07-25
Anticipated expiration: 1916-07-25

Description

No. 629,723. Patented July 25, I899. G. W. LAUGHTON. FEEDWATEB' HEATER AND PURIFIER.

(Application filed Oct. 31, 1898.]

(No Model.)

ATTORNEYS.

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UNITED STATES" PATENT Grinch.

GEORGE W. LAUGHTON, OF NEWYORK, N. Y.

FEED-WATER HEATER AND PURIFI ER.

SPECIFICATION forming part of Letters Patent No. 629,723, dated July 25, 1899; Application filed. October 31, 1898. Serial No. 694,989. (No model.)

T0 Ml whom it may concern:

Be it known that I, GEORGE W. LAUGHTON, a citizen of the United States, residing in the city of New York, in the borough of Manhattan and State of New York, have invented certain new and useful Improvements in Feed-Water Heaters and Purifiers, of which the following is a specification.

The object of this invention is to furnish an improved feed-Water heater and purifier to be used in connection with an ordinary steam-boiler in which the well-known surface-blow is made use of to remove the grease and other impurities accumulated as a scum on the surface of the water in the boiler and the surface steam blow conducted through a system of tubes through which the feed-water is also passed on its way to the boiler, so that the heat of the surface-blow raises the temperature of the feed-water to nearly boiler temperature, while suitable filtering-chambers are interposed at suitable points to remove the grease in the surfaceblow and the impurities and scale-forming matter in the feed-Water before the water is fed into the boiler. For this purpose the invention consists of an improved feed-water heater and purifier which comprises, in combination with a steam-boiler and feed-pump, a blow-off pipe terminating at the mean Water-level in the boiler, a heating-chamber connected with the outer end of said blow-off pipe, a grease-extractor connected with said heating chamber, a pipe connecting said grease-extractor with the supply-pipe at the suction side of the feed-pump for the preliminary heating of the feed-water, a feed-water pipe connected with the force side of the feedpump and passing through the heating-chamber, a filtering-chamber connected with the feed-water pipe, and a pipe leading from the filtering-chamber to the steam-boiler, as will be more fully. described hereinafter.

The accompanying drawing represents a vertical longitudinal section of my improved feed-water heater and purifier, showing the steam-boiler likewise in vertical longitudinal section and the feed-pump in side elevation.

Referring to the drawing, A represents a steam-boiler of any approved construction. In the steam-boiler is arranged a vertical blowoff pipe B, which passes through the shell of the steam boiler and the upper end of which is on a level with the mean water-level of the boiler. Below the steam-boiler is arranged a cylindrical chamber 0, which is connected with the lower end of the blow-0E pipe B, said chamber being provided with tightly-packed heads 0, having stuffing-boxes d d, through which extends a feed-water pipe D, one end of which is connected with the supply-port or force side of the feed-pump 1?, while the opposite end is connected by a pipe 6 with the lower part of .a filtering-chamber. E. The blow-0E pipe is connected with the cylindrical heating-chamber 0 near one head, while a grease-extractor F is connected at its lower part by a pipe f with the chamber 0 near its opposite head. The upper part of the greaseextractor F is connected by a pipe F with the feed-water supply-pipe G at the suction side of the feed-pump P, while the upper part of the filtering-chamber E is connected by a pipe H with the steam-boiler A.

The filtering-chamber and grease-extractor are charged with suitable filtering material, the filtering-chamber with filteringmaterial by which the scale-forming substances are removed, while the grease-extractor E, which is connected with the cylindrical chamber 0,

is chargedwith material by which the oil and.

grease that isremoved from the surface of the water in the boiler is collected..-

The pressure of the steam on the surface of the water in the boiler forces a certain quantity of water, with the grease that is formed in the nature of a scum or film on its surface, through the blow-01f pipeB into the heating-chamber 0, from which the water passes through the grease-extractor F, which separates the grease and oil from the same. The water passes then to the pipe F and mingles with the feed-water that is drawn in through the supply-pipe G and suction-pipe S at the suction-port of the feed-pump P. The feed-Water which is thus mixed with the hot boiler-water is heated to some extent thereby and then passes through the pipe D and is heated therein as it passes through that part of the pipe D which is located within the heating-chamber O. This highly-heated 1 water passes then through the filter E, which removes the scale forming substances, the purified water being then conducted by the supply-pipe H into the boiler.

The heat of the water forced through the blow-oif pipe under the pressure of the steam in the boiler serves to raise the temperature of the feed-water in the pipe D to nearly boiling temperature. It mixes with the feedwater in the suction-pipe S and feed-pump, the feed-water entering the suction-pipe in the form of an injector-jet, and after the preliminary heating in the suction-pipe and pu mp the feed-water is finally heated in the heatingchamber 0. The grease blown off from the boiler is collected in the grease-extractor F, while the scale-formin g matter and impurities in the feed-water are collected in the filteringchamber E, so that the feed-water is supplied in highly heated and purified form to the boiler.

My improved system of feed-water heating and purifying has the following advantages:

First. By employing the surface-blow the boiler is kept free from grease and other impurities.

Second. By inter-posing the feed water heater between the boiler and the feed-pump the live steam which would otherwise be lost in blowingofi the grease from the surface of the water in the boiler is utilized for heating the feed-water.

Third. By interposing the filtering-chain her and the grease-extractor the boiler is kept free from incrustation for the reason that the scale-forming substances are separated, while the oil is also separated and collected for use.

Fourth. The feed-water heater and purifier forms a simple and inexpensive addition to the boiler-plant, while it produces a considerable saving in fuel not only by supplying feed-water at nearly the temperature of the water in the boiler, but by removing the scale- "forming substances from the feed-water bepipe terminating in the boiler, a' heatingchamber connected with the outer end of said blow-off pipe, a heating-pipe passing through said chamber to the boiler, a grease-extractor connected with said heating-chamber,a pump, a pipe connecting the grease-extractor with the feed-water pipe at the suction side of the pump, and a pipe connecting the force side of the pump with said heating-pipe, substantially as set forth.

2. The combination,with a steam-boiler and feed-pump, of a feed-water heater and purifier, consisting of a blow-off pipe terminating in the boiler, a heating-chamber connected with the outer end of said blow-oh? pipe, a grease-extractor connected with said heatingchamber, a pipe connecting said grease-extractor with the supply-pipe at the suction side of the feed-pump for the preliminary heating of the feed-water, a feed-water pipe connected with the force side of the feed-pump and passing'through the heating-chamber, a filtering-chamber connected with the feedwater pipe, and a pipe leading from the filter in g-chamber to the steam-boiler, substantially as set forth.

3. The cornbi nation,with a steam-boiler and a feed-pump for the same, of a feed-water heating-chamber below said steam-boiler,said chamber being provided withheads and stu Piing-boxes on said heads,a feed-Water pipe connected with the force side of the feed-pump and passing through the heating-chamber, a blow-off pipe connecting the heating-chamber with the interior of the boiler, a grease-extractor connected with said heatingchamber,