US250519A - Feed-water purifier for boilers - Google Patents

Description

(Model.)

0, A. FRENCH.

FEED WATER PURIPIER FOR BOILERS. No. 250,519. Patented Dec. 6,1881.

JWM Mfg-W4 UNTTED STATES PATENT OFEIQE.

CHARLES A. FRENCH, OF DAVENPORT, IOWA.

FEED-WATER PURIFIER FOR BOILERS.

SPECIFICATION forming part of Letters Patent No. 250,519, dated December 6, 1881.

Application filed August .23, 1880. (Model) To all whom it may concern:

Be it known that I, CHARLES ALBERT FRENCH, a citizen of the United States, residing at Davenport, in the county of Scott and State of Iowa. have invented certain new and useful Improvements in Feed-Water Generators and Purifiers for Steam-Boilers; and I" do hereby declare that the following is afull, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

Heretofore feed-water for steam-boilers has been only partially purified by compositions tending to filter, absorb, or collect only a portion ofthe impurities,which, after a short time, lose their power of absorbing impurities and must be replaced or cleaned.

The object of my invention is to perfectly purify feed-water, and make the operation continuous without any perceptible loss of heat, and provide for a quick and speedy mode of removing the impurities as they accumulate; and it consists in forcing the feed-water into a chamber that is surrounded by steam, causing the feed-water to be speedily evaporated and condensed or absorbed by the steam in the boiler, leaving all the impurities in the chamber, where they can be blown out or speedily removedby taking off the heads. I attain these objects by the apparatus illustrated in the accompanying drawing.

The figure represents a side elevation of the boiler and apparatus, in which- B is the boiler; e, the drum, into which the feed-water is pumped to be evaporated. f is the outer drum or jacket. The drum lis to work in connection with an injector, to have.

same result were the injector connected with the boiler; but this drum might be dispensed with if the pipe to is connected a little above the bottom, so as to leave some water in the drum c all the time.

To carry my invention into effect I place above the water-line a drum or chamber, e, (with or without a removable head of any desired shape or style,) and connect it at or near the bottom by a pipe, a, and extend upward higher than the drum or chamber, thence downward, and connect with the boiler above the water-line. The upward bend in the pipe is to prevent the feed-water that is forced into the sediment can be blown out.

the drum from running into the boiler by gravity. I circumscribe this drum or chamber with another steam-tight drum, chamber, orjacket, f, leaving a steam-space between. I then connect the top or near the top of this outer drum or jacket,f, by a pipe, b, with the boiler above the water-line, to supply the drum or jacket with live steam to keep the inner drum hot, and the bottom of the outerdrum, chamber, orjacket-I connect by a pipe, 0, with the boiler any place, so that the steam that condensesin the space between the two drums will run into the boiler by gravity.

If the pipe a is large enough, thejacketfmay be dispensed with, or the drum 0 may be placed below the water-line; also, thejackctf, if the condensed steam is kept pumped or drained out of thejac-ket f; also the pipe to may lead out from the dome, ifit is higher than the drum e, and the upward bend in the pipe a dispensed with by putting a porous partition in the pipe a, to keep the water from running through and yet allow the steam to go through.

The drum 6 may be dispensed with by making the pipe a large enough, and extending it upward in place of entering the drum e, and closing the top end of the drum 0.

The feed-water is forced into the chamber 0, (through the pipe d and drum 1, which is always full,) the water rises in the chamber or drum 0, and, being surrounded by steam, is soon heated ashot as the water in the boiler B, and hot steam coming from the boiler B through pipe at comes in contact with the water in drum 6, absorbs it, and carries it over into the boiler B, leaving every particle of impurity in the inner drum, 0, where, by opening a cock in the pipe m and closing the cook 70, By opening the cock h the water can be blown through and rinse or wash it out; or steam may be allowed to blow through the pipe at for the same purpose; or the drum may be cleaned anytime, without blowing off the steam in the boiler, by closing the cocks h ij k and taking off the heads. I have found that water in the drum 6 will be carried over in the shape of steam, (whether the cock his open or closed,) and settle in the boiler.

The drum 6 and jacket f may be placed with their axes on a level plane, so the drum 0 can be rotated to prevent the sediment from settling so fast, and the connection made through the axes by steam-tight joints, but the pipe a would have to have a downward bend, so as to bring the steam in contact with the water at the lowest point in the drum 6.

The feed-water may be heated by exhauststeam or otherwise in any manner before it is forced or injected into the drum e, to save fuel.

I am aware that prior to my invention S. A. Goodwin and J. 0. Juice, April 1, 1879, patented an apparatus consisting of a drum connected at the top with top of boiler and the bottom with the bottom of the boiler, and the feed-water forced in at the top falls on a series of shelves, is heated more or less, the balance of the water falls into the bottom, stirs up and mixes with the sediment, and overflows and runs into the boiler through the pipe, running always downward from the bottom of the drum with the bottom of the boiler, while mine has an upward bend; but theirs is not perfect in its operation, for the foam and spray produced will go into the boiler, and if the water is pumped in too fast will chill the apparatus and run into the boiler with its sediment. It makes use of the steam to heat iron shelves, and depends on them while fallingthrough the steam to heat the water.

It is evident that the drum cmight be placed in chimney or smoke arch or exhausting steam, where the heat would aid the operation, and thus dispense with the outer drum or jacket, f. All the water that condenses in the jacket is the same as so much pure water pumped into the boiler. It will be seen that the pipe a can be connected anywhere on the drum 6. As long as there is a place in the pipe that is higher than the top of the drum 0 the water cannot run into the boiler by gravity; also, that the pipe I) might be dispensed with by making the pipe 0 large enough to supply steam and also carry off the condensed steam; or this jacket may be secured permanently to the boiler, and a series of holes in the partition, or no partition between the bottom of the inner drum and the boiler.

I do not claim the process of evaporation and distillation.

I claim- 1. The process of purifying feed-water for steam -b0i1ers, consisting in conveying the steam into a receptacle having a feed-inlet, whereby the water is generated into steam or absorbed by it, as described.

2. The process of feeding steam-boilers by confining the feed-water in a receptacle, and causing live steam to circulate into the feedwater, generating it into steam and conducting it into the boiler in the shape of steam, as described.

3. The combination of a boiler with a steam pipe or passage leading to a receptacle having

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