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Publication numberUS468984 A
Publication typeGrant
Publication dateFeb 16, 1892
Filing dateMay 13, 1890
Publication numberUS 468984 A, US 468984A, US-A-468984, US468984 A, US468984A
InventorsErnst Boeing
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Ernst boeing
US 468984 A
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Description  (OCR text may contain errors)

(No Model.)



Patented Feb. 16, 1892.




SPECIFICATION forming part of Letters Patent No. 468,984, dated February 16, 1892.

' Application filed May 13,1890. Serial No. 35.1.70L (No model.)

To all whom, it muy concern:

Be it known that l, ERNST BoErNG, a subject of the King of Prussia, residing at Bad Nauheim, in the Grand Duchy of Hesse Darmstadt, in the German Empire, have invented certain new and useful Improvements in Water-Purifyin g Apparatus; and I do hereby declare the following to be a full, clear, and eX- act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention is an improvement in waterpurifying apparatus; and it consists in the novel features hereinafter fully described.

In the accompanying drawings I have shown a sectional View of a water-purifying apparatus constructed in accordance with my invention, and said invention-is fully disclosed in the following description and claims.

The novelty of this invention consists in having between the supplypipes and the boiler an apparatus in the nature of a feedwater heater, which mechanically purifies the water completely and then lets it pass to the boiler. This apparatus is made of sufficiently strong iron and has generally the form of a cylinder. The usual size of the apparatus is 1.25 meters in height and fty centimeters in diameter. Such an apparatus will be su ficient for one to four boilers; but the same can be greater or larger, according to requirements.

The iron cylinder of the apparatus consists of two parts, of which the under part is as a rule 1.00 meter high and the upper part A twenty-tive centimeters high. These two parts are fastened together by means of screws passing through iianges; but before fastening the parts together a strainer D, made of sheetcopper or of sheet-iron, is laid in and this separates the two parts. This strainer D is provided with openings tive millimeters Wide, (strainer-holes.) The under part of the cylinder has about five to ten centimeters above the bottom a man-hole, Awhich is really an easily-to-be-closed opening and is for the purpose of removing any sediment. The supply of water, which is effected by means of one or more pipes and by means of steam-pumps, pulsometers, injectors, dac., any one or more acting alone or together, opens about forty centimeters above the bottom of the lowerpart of the cylinder. The pipes which carry aso-called c-floatinglaye1" ten to fifteen ceutimeters high. This iioating layer consists of small cubes siX to ten millimeters in size, which are made of suitable wood, such as willow or walnut. There mustbe ,so many of these cubes filled in as that when the apparatus is lled with Water the floating layer under the sieve-partition will be ten to fifteen centimeters thick.

The procedure in the apparatus, then, for

the perfect purification of water is as follows:

If water is to be passed through, the shut-off valve a, between the steam-boiler and the apparatus, is opened, so that hot water from the boiler will pass into the upper part of the apparatus, and after passing through the quartz layer, -as pumice-stone, filtering-stone, &c., will pass into the lower part. Then the shut- 0E valve b, between the apparatus and the pump, injector, or the like, is opened and the passage proceeds. The water thusbrought forward now iiows into the lower part of the apparatus and passes upward through the floating layer and through the quartz layer on the filtering-partition into the upper part of the apparatus, and from there into the steam-boiler by reason of the pressure which is produced by the pump, injector, or the like. The floating layer of wooden cubes takes all the slime of the water, but purifies itself constantly of this, because the separate parts as soon as they are sufficiently covered with slimeV sink, and there are met by the inflowing stream of Water, whereby they are readily freed from slime and then pass upward. If very ine particles of slime are carried onward by the water, these will be caught by and remain in the quartz layer, which again IDO y filters the water.

This quartz layer is made of thickness according to the quantity of slime held by the water, so that there may be a perfeet filtration and purification. The particles of slime which are caught and held b-y the quartz layer are at each induction by the streaming back of hot Water, which establishes the equilibrium between the boiler and the apparatus, carried vback through the sieve-partition, here taken up by the Wooden cubes, and thus carried to the bottom ofJ the apparatus. If the steam-boiler to be fed has a greater quantity of salts, alkalies, duc., which ought to be removed, then there may be placed directly upon the sieve-partition under the quartz layer suitable substances between layers of raw cotton, &c. In place of the layer of quartz there may be any other rough pieces of puinice-stone, filtering-stone, or the like, and the upper part of the apparatus may be so arranged that it may be easily opened and in a few minutes be purified even during operation.

Steam-boilers which heretofore have had to be cleaned every few months can be used by this apparatus for years and even at the end of this time no scale will be found.

This apparatus can beput up at smallcost and may be used for years without necessity of resupply of filtering material. It is sufficient, as a rule, if the upper filling is taken out of the apparatus once a year, washed clean, andv replaced.

lThe apparatus may itself be cleaned dur-- ing operation as soon as the shutoff valves a and b are closed. By means of asmall purgevalve (not shown) not forming any part of this invention the pressure and the water are first let off and then the man-hole C at the under part of the apparatus is opened and the slime, as well as the floating layer, is taken out. The last is then washed in water and filled into the clean apparatus, which may then at once be put into use.

The Whole cleaning of the apparatus requires but a few minutes and may be performed without difficulty.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A water-purifying apparatus consisting of a vessel having an inlet near the bottom and an outlet connected with said vessel near the top of the same, said vessel being provided with floating filtering material, and a pervious partition between said floating material and the outlet, substantially as de scribed.

2. A Water-purifying apparatus consisting of a vessel provided with an inlet near the bottom and an outlet near the top of the saine, a stratum of filtering material forminga partition between the said inlet and outlet and fioating filtering material below the said partition, substantially as described.

3. A water-purifying apparatus consisting of a vessel provided with an inlet nearthe bottom and an outlet near the top, a pervious partition between said inlet and outlet, filtering material above said partition, and Wooden cubes oating in and across the vessel below said partition, substantially as described.

In Witness whereof I have hereunto set my hand in presence of two witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3077987 *Oct 22, 1958Feb 19, 1963Morimoto HiroshiMethod of filtration by floating filter media
US3424674 *May 10, 1966Jan 28, 1969Ritter Pfaudler CorpUpflow filtration of fluids
US4454040 *Sep 30, 1982Jun 12, 1984Roberts Robert LFilter
US4547286 *Feb 10, 1983Oct 15, 1985Neptune Microfloc, Inc.Water filtration process and apparatus having upflow filter with buoyant filter media and downflow filter with nonbuoyant filter media
US4608181 *May 8, 1985Aug 26, 1986Neptune Microfloc, Inc.Water treatment
US4743382 *Jul 28, 1987May 10, 1988The State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State UniversityMethod and apparatus for separating suspended solids from liquids
US4865734 *Mar 25, 1988Sep 12, 1989Schulz Christopher RBuoyant coarse media flocculator
US4963257 *Sep 11, 1989Oct 16, 1990Schulz Christopher RBuoyant coarse media flocculator
US5413749 *Jun 4, 1993May 9, 1995Wheelabrator Engineered Systems Inc.Process of making beads for a liquid purification bed
US6391448Nov 9, 1994May 21, 2002United States Filter CorporationLiquid purification beds and beads therefor
Cooperative ClassificationB01D23/10