US639519A - Apparatus for separating oil from water. - Google Patents

Description

Patented Dec. l9, I899.

V. CAMIZ & A. BETTDNI. APPARATUS FOR SEPARATING OIL FROM WATER.

(Application filed June 10, 1897.)

2 Sheets$heet I.

(No Model.)

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APPARATUS FOR SEPARATING OIL FROM WATER.

(Application filed June 10, 1897.)

2 Sheats-Sheet 2.

(No Model.)

NITED STATES PATEN VITO OAMIZ AND ANGELO BETTONI, or VENICE, ITALY, ASSIGNORS To SAID CAMIZ, AND ANSELMO GOBBA, OF OASTELNUOVO SCRIVIA, ITALY.

APPARATUS FOR SEPARATING OIL FROM WATER.

SPECIFICATION forming part of Letters Patent No. 639,519, dated December 19, 1899.

Application filed June 10, 1897. Serial No. 640,253. (No model.) 7

T ctZZ whont it may concern:

Be it known that we, VITO GAMIZ, commander, and ANGELO BETTONI, third-class chief engineer,both of the Royal Italian Navy,

subjects of the King of Italy, residing at Venice,in the Kingdom of Italy, have invented certain new and useful Improvements in Apparatus for the Recovery and Purification of WVaste Oil, for Which We have obtained a patlo cut in Italy dated February 16, 1895, General Register, Vol. XXIX, No. 38,130, Register of Certificates, Vol. LXXIV, No. 423,) of which the following is a specification, reference being had to the accompanying drawings.

This invention has for its object to provide a new and improved apparatus for the recovery of waste oil from the bilge-water on board ship orin factories where oil is used for lubri cating purposes.

To accomplish this object, our invention consists in the features of construction and in the combination and arrangement of parts hereinafter described and claimed, reference being made to the accompanying drawings,

in which-- Figure 1. is a vertical central sectional view of one form of our improved apparatus for recovering and purifying waste oil; and Fig. 2 is a modification of the same, showing a simplified form of construction.

The recuperator consists of a cylindrical or other shaped vessel made of sheet metal or other suitable material, closed both at the bottom and at the top end thereof.

5 top end the recuperator communicates with the aerator II by means of a pipe F. The

said recuperator is divided into concentric chambers by means of a vessel of any suitable shape, preferablythat shown in Fig. 1,

having flanges b I) b, for the purpose hereinafter mentioned. I

Near the lower end of the recuperator is connected a pipe 0, the upper end of which is in communication with the ejection-valve 5 D, thus forming part of the ejection-pipe. The other end of the said ejection -pipe when coming from the ships pumps enters the re-' cuperator from the bottom through pipe A and valve A, controlled by spring a, and a pipe A, fixed to the bottom of the internal vessel B above named. The recuperator1s At the therefore only an expansion of the ejection= pipe, formed for the purpose hereinafter described.

The aerator II is formed of cylindrical or other shape and may be made of sheet copper, brass, or of other suitable substance. The shell or body G of the said aerator is closed at the top and bottom. The lower end, however, communicates by means of the pipe F with the ,recuperator, as above indicated, above which it is situated. The said aerator is provided in its interior with a float G, made of any suitable form or material and held in position by means of rollers g. The float is 6 connected by means of lever 00 and rod 'y or v by other convenient means to an air-valve H, arranged in a pipe 2, communicating with the top of the aerator II, the said valve being open or shut, according to the movement of said float l. The leverac is provided with a weight W for controlling the float; but use may be made of a spring or any other suitable known arrangement for the same purpose. The air-valve H must be placed at the 7 5 same level above the water as the ejectionvalve D hereinbefore referred to.

III is the separator, which is provided near its top with a pipe in communication with a drip vessel, such as L, adapted to receive the So liquid from the cock I of the aerator. When it is not possible to arrange the vessel L directly below the said cock I, a second similar vessel L is provided, so that in any case the flow of liquid from the cock I is directed into the separator. Above the level of the inlet of the tube M is fixed a valve N, and at the bottom of the separator is connected a pipe P, directed upward and having its upper end turned over or bent, so that the liquid therefrom may be sent back to the ships hold through a suitable pipe Q.

IV is the purifier, forming the last part of the apparatus. This purifier may consist of a single vessel X, as shown in Fig.2, or of 5 two similar vessels X Y, as shown in Fig.1.

R is an inlet-pipe; R, a spiral steam-pipe;

Z and V, steam-cock for said coil, and n gauze. cook or cocks.

When the purifier is double, as in Fig. 1,

being connected to the top of the vessel X and passing to the bottom of the vessel Y, while the pipe T passes from the bottom of vessel X to the top of the vessel Y.

When there is sufficient room and in cases where large quantities of oil have to be recovered, we add to the apparatus a settlingtank U, provided with internal diaphragms u and u, alternately fixed, the one u at bottom and the others a at top of the said tank, for the purpose hereinafter explained.

Each of the vessels I III X Y and the tank U above described are provided with bottom cocks K for cleaning purposes.

Having thus described the construction of the apparatus,we will now explain the manner in which it operates to recuperate and purify waste oil.

When the bilge-water and oil are drawn up by the shipspumps, they pass through pipe A, valve A, and pipe A" into the vessel 13, in which they accumulate until they reach its open top, when thewater, owing to its greater specific gravity, falls down over the said vessel 13 to the bottom, of the annular chamber E. This water on falling upon the flanges Z) 1) leaves a part of the grease with which it is mixedfand when the chamber E is full oil mixed with water and dirt will float and enter the aerator through the pipe F, there accumulating until it reaches the float G. Then owing to the equality of level the water at the bottom of the chamber E will enter the pipe (3 and fill it until reaching the ejectionvalve D, from which it passes into the sea. At the same time the oil will force the float G up, when any air drawn in by the pumps when the level of bilge-water is low is free to escape through the air valve H, opened, as we have described, by the upward motion of float G. The cock I is then opened, and the pipes L and M lead the oil to the separator III, where it accumulates u ntil it reaches the cock N., During the time the separator is filling a first natural separation of the oil from the water will take place, the latter being forced by gravity through pipe P and returning to the ships hold. Oil is conveyed through cock N and pipe R to the purifier IV and accumulates in it, its quantity being exactly-ascertained by means of the gage-cocks n above mentioned.

When the oil used is simply mineral oil, the purification will be obtained by simply boiling the oil for nearly fifteen minutes and then allowing it to stand more or less, as desired. In this case if two purifiers are provided when the pressure developed by boiling is sufficient we open the cock t on the tube T and all the oil will pass into the second purifier, the first remaining free to re ceive a new charge to be purified.

hen either olive-oil alone or a mixture of olive and mineral oil is used, it is necessary before heating the emulsion in the purifier to add, a quantity of from four to six per cent. of its own weight of crystallized soda or any other saponifying substance. Then after boiling for nearly fifteen minutes and allowing it to stand for more than one hour, pure oil, being a mixture of olive and mineral or simple olive oil, according, to quality employed, will be found to float. Should, however, this not prove sufficient, then an addition of from twenty-five to thirty liters of fresh water for each fifty kilos of the emulsion, which is then reboiled and allowed to stand for a suitable time, will give a pure and clean oil. Should, however, this not be enough, a new addition of four per cent. soda, with a boiling and suitable rest, will certainly produce pure and clear oil, ready for use to lubricate the parts of the engines. In this case and when two purifiers are provided the addition of soda is made in one of them and the addition of water in the other, having thus always one purifier ready to accumulate emul- S1011.

I'Vhen mineral oilis only used, the quantity of oil so recuperated is more than seventy-five per cent. of the quantity originally used; but when olive-oil or a mixture of olive and mineral is used the quantity recuperated is nearly forty-five to sixty per cent.

IVhere space admits of its use, we place, we above stated, a settling-tank substantially as described, in which the oil, being obliged to flow slowly over diaphragms a and under diaphragms it, leaves all dirt and the small quantity of water, which still remains at the bottom, the oil thus coming out of the cock 0 when needed as pure and as clear as new oil.

I What we claim is- 1. In a device for separating oil from Water the combination of an upright vessel having an ejection-pipe connected to its bottom portion, of an inner vessel arranged concentrically within said vessel and open at its upper end and closed at its lower one, an inletpipe connected to the bottom of the inner vessel, an oil-receiving vessel arranged above and connected to the top of said upright vessel, and a discharge-pipe connected near the bottom of the oil-receiving vessel, substantially as described.

2. In a device for separating oil from water, the combination with an upright vessel having an ejection-pipe connected toits bottom portion, of an innervessel arranged concentrically Within said upright vessel and having an open top and closed bottom, an inlet-pipe connected to the bottom of the inner vessel, an oil-receiving vesselarranged above and connected to the top of said upright vessel, a discharge-pipe connected near the bottom of the oil-receiving vessel, an air-discharge pipe connected to the top of said 011- receiving vessel and provided with a valve, a float arranged in the oil-receiving vessel, and mechanism operated by the float for opening the valve to permit the escape of air, substantially as described.

3. In a device for separating oil from water, the combination with a vessel having an ejection-pipe connected to its bottom portion of an inner vessel arranged concentrically within said first vessel and having an open top and closed bottom, an inlet-pipe con-' nected to the bottom of the vase, an oil-receiving vessel arranged above and connected to the top of said vessel, means for automatically discharging the air from the oil-receiving vessel, a discharge-pipe connected near the bottom of the oil-receiving vessel and a separator vessel arranged to receive the oil from said discharge-pipe and provided at its upper and lower ends respectively with an oil and water discharge pipe, substantially as described.

4. In a device for separating oil from water, the combination with the recuperator into which the water and oil are delivered, the aerator communicating with the recuperator and receiving the oil, mixed with water and dirt, therefrom, the separator receiving the water and oil from the aerator and in which the oil and water are separated, a purifier receiving the oil from the separator, and a heater for heating the oil in the purifier, substantially as and for the purposes described.

5. An apparatus for the separation of oil from water andimpurities, consisting of a vessel provided at its bottom with a dischargepipe and with a concentric vessel open at its upper end and connected at its lower end with a supply-pipe, an oil-receiving vessel connected with the top of said vessel and provided near its bottom with an oil-outlet, means for automatically discharging the air from the oil-receiving vessel, a separator arranged to receive the oil discharged from the oil received and provided with means for separating the oil and refuse by gravity, and a purifier to receive the oil from the separator and provided with means for heating the oil and with gage and draw-off cocks for drawing off the purified oil from the upper portion of the purifier, substantially as described.

In testimony whereof we have hereunto set our hands this 17th day of February, 1897.

VITO OAMIZ. ANGELO BETTONI.

Witnesses:

GIOVANI VEReNoL, JOHN VEL JAoKsoN.

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