US898876A - Method of purifying water. - Google Patents

Description

W. H. GREEN. METHOD 0F PURIFYING WATER..

APPLIGATION FILED PEB.17, 1908. .y 898,876 Patented sept. 15,190sv 2 SHEETS-SHEET 1.

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W.v H. GREEN.

METHOD 0F PURIFYING WATER.

APPLICATION FILED FEB. 17, 1908.

Patented Sept. 15,1908.

SHEETS-SHEET 2.

WALTER H. GREEN,

OF CHICAGO HEIGHTS, ILLINOIS, ASSIGNOR TC KENNICOTT WATER SOFTENER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

METHOD 0E PURIFYING WATER.

Original application filed October 18, 1907, Serial No. 397,960.

Serial N o.

To all whom t may concern:

Be it known that I, WALTER H. GREEN, a citizen of the United States, residing at Chicago Heights, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Methods of Purifying Water, of which the following is aspecification.

My invention relates to an improvement in the art of purifying, or softening, water for industrial purposes; and the primary object of my improved method is to enable the 'apparatus for practicing it to be so simpliiied in construction as to avoid all necessity .for frequently climbing it for manipulating niechanism in elevated position, for adjustment and other purposes.

The present application is a division of my pending` application, Serial N o. 397,960, filed October 18, 1907.

In the accompanying drawings, Figure 1 is a view in vertical sectional elevation of a water-softening apparatus suitable for the practice of my invention g Fig. 2, a view in side elevation of the valved hard or raw water box; Fig. 3, a section taken at the line 3 on Fig. 2, and viewed in the direction ofthe arrow; Fig. 4, an enlarged broken and partly sectional view of one form of the means I have devised for automatically proportioning the feed of the chemical solution to that of the water under treatment, and showing the device in its position relative to an overflowreceptacle Fig. 5, a broken view of the same in end elevation, showing one position by dotted representation Fig. 6, a section taken on the line 6 on Fig. 4, and viewed 'in the direction of the arrow Fig. 7, a broken view in elevation showing a modified construction of the device illustrated in Fig. 4, and Fig. 8, a similar view of the same regarded in the direction of the arrow in Fig. 7.

The precipitating-tank 9 is equipped with an overflow 10 near its upper end and a valved pipe 11 on its bottom for drawing off sludge and containing a downtakeronduit 12, and the water-box 13 surmounting the precipitating-tank contains a float 14 suspended by a rod 15 from one end of a lever 16 fulcrumed at its opposite on a standard 17. In a side of the box 13 near its bottom is provided a discharge-opening 1S through which to direct the raw water into the top of the conduit 12, and this opening is shown to be Specification of Letters Patent.

Patented Sept. 15, 1908.

Divided and this application filed February 17, 1908. 416,264.

equipped with a slid e-valve 19 for regulating' the area of the discharge-opening.

The raw water to be treated is supplied from any suitable source and introduced, as through the medium of a pump represented at 20, discharging through a pipe 21 into the box '13 at its open top. The chemical solution is contained in a tank 22 shown to be supported at the base of the settling-tank 9. The solution is fed to the tank 9 through a pipe 23 in which a pump 24 is shown to be interposed; and another pipe 25 surmounted by a receptacle 26 leads from the latter to the tank 22 to return into it and thus save the overflow of the solution. As representedl in Figs. 1, 4 and 5, the pipe 23 above the top of the settling-tank is bent to a right-angle to form a horizontal tubular arm 27 containing a lateral elongated slot 2S about which lits a longitudinally slidable sleeve 29 for regulating the discharge-area of the slot. On the outer end of the arm 27 is rotatably fastened through the medium of a stufiing-box 30, or packedjoint, an extension 31 bent to project at an angle, and preferably a right-angle, to the arm and connected from its free end by a link 32 with the lever 16. The adjustable extension 31, which automatically maintains the headof the solution in correspondence with that of the water in the box 13, is directly above the receptacle 26.

In the operation of the apparatus the raw water to be treated enters the box 13 through the pipe 21 and discharges through the opening 18 in the latter into the downtake-conduit 12 while the chemical solution enters that conduit from the pipe 23 through the discharge-slot 23 to mix with the water for its reaction thereon. Any increase or decrease in the rate of iiow through the pipe 21, under variation in the operation of the pump 20, will raise or lower the level of water in the box 13, thereby varying the head thereof and raising or lowering the iioat 14 correspondingly. As the float rises or falls it moves the lever 16 accordingly causing the latter through the link 32 to raise or lower the outer end of the extension 31 to correspond with the change of water-level in the box 13 and thus vary the head of the solution in the extension in accordance with the variation" of head in the water-box, so that as the rate of flowthrough the slot 18 changes under variation of head in the wa ter-box, that of the solution through the slot 28 will vary correspondingly as the outer end of the extension 31 is raised or lowered under the action of the float. The surplus of the solution overflows from the open outer end ofthe rotatable extension into the receptacle 26 whence it returns through the pipe 25 to the tank 22 and is saved.

From the foregoing description of the operation it will be seen that regulation of the supply of treating reagent to the raw water is effected by automatically varying the head of Jihe supply of reagent in a manner to vary its level with relation to a iiXed discl'rarge of the solution to the water in accordance with variation in the supply of raw water to the apparatus; which constitutes the gist of my invention. The same result is accomplished in substantially the same way by the modified construction illustrated in Figs. 7 and 8: Therein the pipe 23 terminates at its upper end in a T-coupling 33 from one end of which projects a rigid angular and tubular arm 29a, the outer section extending by preference vertically and containing a lat eral perpendicular elongated discharge-slot 28EL for the solution, while at the opposite end of the coupling is rotatably supported in alinement with the receptacle 26, through the medium of a stuffing-box 30u, or packed-joint, the angular extension 31a, si1nilar to the extension 81 and like the latter' having a link-connection 32a withthe lever` 16.

Mlith this construction raising or lowermg of the extension 31. under the action of the iloat correspondingly changes the head of solution therein (any overflow of the solution Jfalling into the receptacle 26), the level of the solution in the extension, whatever its position, being necessarily the same as the level thereof in the arm 29a.

What I claim and desire to secure by Letters Patent is- 1. The method of regulating the supply of treating reagent to the raw water under treatment in a water-purifying apparatus of the character described, which consists in overflowing the reagent-supply and automatically varying the head of the reagentsupply by varying the level of the overflow thereof, with relation to an immovable discharge-outlet for saidA supply to said water, in accordance with variation in the supply of said water to the apparatus.

2. rThe method of regulating the supply of' treating reagent to theraw water under treatment in a water-purifying apparatus of the character described,.which consists in supplying the water and chemical solution each through an immovably iiXed discharge to the apparatus, overflowing the solution-supply and automatically varying the head of solution by varying the level of its overflow relative to its fixed discharge correspondingly with variation of the head of water relative to its discharge.

WALTER H. GREEN. In presence of" L. HEISLAR, R. SCHAEFER

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