US392606A

US392606A - Apparatus for purifying sewage

Info

Publication number: US392606A
Authority: US
Publication date: 1888-11-13
Anticipated expiration: 1905-11-13

Description

(No Model.)

J. G. HEYWOOD.

APPARATUS P0P. PUMFYING SBWAGE. No. 392,606.

a? '11T/512ml.

N. Panni PlwwuAnwgmplm. wasn-imm n. c.

- showing mechanism constructed in accordtrie l JOHN G. HEYW'QOD, 4OF VVORGESTER, MASSACHUSETTS.

APPARATUS FOR PURIFYING SEWAGE.

4 SPECIFICATION forming part of Letters Patent No. 392,606, dated November 13, 1888.

Application filed January 1G, 1888 .To @ZZ whom, i may concer/"t:

Be it known that I, Jer-IN G. Hnrwoon, a citizen of the United States, residing at Worcester, in the county of Vorcester and State of Massachusetts, haveinvented certain new and useful Improvements in Apparatus for Purifying Sewage, of which the following,together with the accompanying drawings, is a specification sufficient] y full, clear, and exact to enable persons skilled in the art to which this invention appertains to make and use the same.

The object of my present invention is to pro"- vide an efficient mechanism in which forced pressure is employed for separating the solids fromtheliquidin thepuriiication ofsewage, and also to afford convenient means for cleansing the ltering-surface and discharging` the sludge while the apparatus is in continuous operation. These objects I attain by mechanism the nature, construction, and operation of which are explained in the following description, the particular subject-matter claimed being hereinafter definitely specified.

' In the drawings, Figure l is a plan view; and Fig. 2 is a vertical section at line X X,

ance with my invention.

My improved mechanism comprises a tank or chamber, into which the sewage is delivered, a submerged perforated suction-box, over which a continuously-traveling lteringbelt which passes into and from the tank is drawn while the interior of said suction-box is exhausted by a suitable pumping` mechanism, a set of guiding-rolls that carry the ilterbelt in such manner that only one surface is exposed to the unltered sewage, and devices whereby the filtering-belt is cleared as it advances and the sludge removed therefrolmthe mechanism being organized for operation as a filtering-engine, as follows:

Referring to parts, A denotes the supplypipe, through which the sewage enters from any source, a suitable gate being provided for regulating the dow and quantity delivered as required.

B denotes the tank, reservoir, or chamber into which the sewage is delivered for treatment.

C indicates the suction-box, which is dis- Serial No. 260,946. (No model.)

posed in an inclined position within the tank B and provided with a perforated top plate or grating, C, that occupies a submerged position when the tank isV filled and the sewagewater is at its normal level, as indicated at S in Fig. 2.A The suction-bex is completely closed, except the perforations of the grating C and the exit-passage or suction-pipe C,

.D and D indicate guiding-rollers arranged in recesses at the ends of the suction-box, and E denotes an operating-drum located outside the tank,which rolls and drum, together with the guide-roll F', support and carry the endless traveling iiltering-belt F, which beltpasses around the suction-box C, fitting against its bottoni and top surfaces and against the rolls- D D', and seated closely upon the grating C and entirely covering the openings in the same. The roll F is placed so as to guide the filter-belt over the front rim of the tank, and also in such position as to direct said belt against the face of roll D', above the surface level of the sewage S. Thus one face of the filtering-belt'- that which runs against the suction-box-is protected from contamination, the sludge being deposited. only upon the outer surface of said filter-belt. The belt F may be made wholly or in part of fibrous material-as cloth, felt, or other suitable fabric*and with metal strengtheni11g-strands, if desired. stances a belt made of line woven-wire fabric, provided along its edges with a binding or border of cloth, rubber fabric, or other material, for strengthening the beltand giving bearing along its edges on the surface of thev Iilter-box.

The suction-box C is preferably constructed and disposed to overhang or project from the side of the tank, the bearings d d of the rolls D and D/ being attached to the suction-box, so that the end of said suction-box will stand clear of any support other than that of its end, which is connected with the frame or side of the tank. This overhanging construetion permits of the filter-belt F being readily slipped on and off the suction-box and rolls D D laterally within the tank for renewal or repairs, the tank B being made of sufficient width to accommodate and permit the convenient removal of the belt laterally. The

I also propose to use in some in- IOO filtering-belt covers the submerged suctionbox grating, so that the liquid enteringthe suction-box passes through the filtering-belt.

A suitable exhauster or pump, G, is couneeted with the pipe C2, leading from the suction-box, which, when operated by steam or other power, tends to produce a partial vacuum Within the suction-box, thus inducing` a forced pressure or suction oftheliquid through the grating C and corresponding portion of the filtering-belt F, the same being at a position wholly submerged beneath the sewage, while no material pressure is exerted at other portions of the belt.

The drum E is mounted on standards or a frame, I-I, which is adjustable for straining and loosening the filtering-belt F, said frame being supported on guideways 7i and provided with an adjusting-screw, K, (one or more,) arranged to be operated for moving the drum lfl toward or from the tank B by the shaft and hand-wheel Il, and suitable gearing combincd therewith. The shaft of the drum E is provided with a pulley, E, for a driving-belt, or with other suitable means for effecting rotation of said drum for operating the filteringbelt F from any elicient motor.

.I indicates a scraper for removing the sludge from the filtering-belt F. Said scraper eX- tends across the belt on the face of the drum E, and is supported on suitable hangers, J at its ends, springs j being provided for pressing the scraper against the surface of the belt.

I and I indicate revolving brushes that sweep the surface of the traveling filteringbelt. Said brushes are mounted on bearings on the frame H, and are rotated by suitable belts on their pulleys fi', i', and I2.

L indicates a striker bar or beater for shaking that portion of the filtering-belt which is between the drum l and the guide-roll F at the edge of the tank. Said beater consists of a bar mounted on the ends of swinging arms l, that are pivoted on the frame II and vibrated by cams or lugs on the shaft of the brush I, or in other equivalent manner.

A. trough or inclined floor, M, is arranged beneath the drum and belt-clearing devices `for receiving the semi-liquid sludge which falls from the filtering-belt and directing it .into the conveyer N, whereby it is carried to a suitable receiving-vat or other convenient place of deposit.

O indicates the outlet, provided with a stopgate, l?, for draining off the contents of the tank B when desired to clean it out or for repairs.

P indicates the pipe for carrying off the contents to any desired place or to be pumped back into the head-reservoir.

The suction-boxl C is preferably made with a man-hole having watertight cover, as at m, to permit access to the interior thereof.

In'the operation of my apparatus the sewage is -delivered to the tank B, and by the pump G is drawn out from the suction-box C, while the filtering-belt F is advanced by a centiiiuous forward motion in the direction indi-- cated on Fig. 2. The sewage-water passes from the tank down through the belt F and gratings C into the submerged suction-box. and thence to the exhauster or pump G, and leaves the solid matter or sludge deposited upon the outer surface of the filter-belt F, where it reposes while it is carried up the ineline, out of the tank, and over the drum Eto the scraper J, which scraper removes the greater portion of the sludge from the belt,-

the balance being removed by the brushes I I and beater L, and it falls upon the trough M and drips through the conveyer N, by which it is carried to the desired place of deposit, the solids being thus discharged by way of said conveyer, While the effluent Water or liquid is discharged through the leader of the pump at G.

In another application for Letters Patent, Serial No. 260,945, I have described a filtering-enginesuch as herein claimed-as employed in connection with other mechanism in a plant for treating sewage; and the claims in this my present case embrace features of construction in the filtering-engine itself, while the claims of my other application embrace the lcombination of a filtering-engine with other mechanisms.

I am aware that movable screens and belts of filtering material have heretofore been employed for various purposes, and I do not therefore make claim, broadly, to a traveling lteubelt irrespective of the construction and arrangement of mechanism wherein such belt is employed.

Vhat I claim as of my invention, and desire to secure by Letters Patent, is-

1. The combination, with the receivingtank, of a stationary submerged perforated suction-box, an endless filtering-belt traveling over said suction-bex, and means for exhausting the air and water from the interior of said suction-box, for the purpose set forth.

2. The combination of the submerged suction-box supported at inclined position and having openings in its top, the inclined filtering-belt seated upon and traveling over the openings of said suction-box, and an exhauster for sucking air and Water therefrom, substantially as and for the purpose 'set forth.

3. A filtering-engine consisting of a tank having inlet and drainage passages, a submerged siiction-box having a perforated side or grating fixed within said tank, an exhausterpump connected with the interior of said suction-box, and an endless filtering-belt disposed in inclined position to travel over the surface of said submerged suction-box grating, in combination With a belt-operating drum and beltclearing mechanism located outside of said tank and operating substantially as hereinbefore set forth.

4. The combination, substantially as dcscribed, of the tank B, the submerged suctionbox C, having the grating C', the guiding-rolls l), D', and F', the inclined filtering-belt F, and

IOO

IIO

the operating-drum E, for the purposes set forth.

5. The combination, substantially as de scribed, of the tank B, the suctionbox C, having the grating C', guide-rolls D, D', and F, the endless traveling lteringbelt F, the scraper J and its operating-drum E, and sludge-conveyer N, for the purpose set forth.

6. The combination, with the tank B, the inclined submerged suction-box C, and endless traveling filtering-belt F, of guide-rol1s D D, fitted to recesses in the ends of said suctionbox, and the guide-roll F', disposed in position to direct the filtering-belt against the sur face of the roll D above the Water-level, as hereinbefore set forth, whereby only the outer surface ofthe fllteringbeltis presented for contact With the unfiltered sewage.

7. An overhanging suction-box supported upon and projecting from the side of the tank, in combination with the filtering-belt, beltcarrying rolls, and a tank of sufficiently greater Width than the suction-box to permit the removal of the lteringbelt from said suction-box laterally Within the said tank, as hereinbefore set forth.

8. The combination, with the eonveyer N, trough M, liltering-belt F, and its operatingdrum E, of the scraper J, rotary brushes I I', and beater L, for the purpose set forth.

9. The combination, with the tank, suctionboX, traveling lteringbelt, its operatingdrnm, and a guiding-roll, F', disposed near the edge of the tank, of a beater, L, arranged for acting upon that portion ofthe belt between said drum and guiding-roll, substantially as and for the purposes set forth.

l0. The combination, substantially as described, with the suction-box, guidingrolls, endless traveling filteringbelt, and belt-operating drum, of the adjustable drum-supporting frame H, its adj usting-screw 7L and. screwoperating gears, and shaft H', for the purposes set forth.

Vitness my hand this 7th day of January, A. D. 1888.

JOHN G. I-IEYWOOD.

Witnesses:

CHAs. H. BURLEIGH, ELLA P. BLENUs.