US1895983A

US1895983A - Apparatus for degasifying liquids

Info

Publication number: US1895983A
Application number: US393231A
Authority: US
Inventors: Kmanueli Luigi
Original assignee: Pirelli SpA
Current assignee: Pirelli and C SpA
Priority date: 1929-04-19
Filing date: 1929-09-17
Publication date: 1933-01-31
Anticipated expiration: 1950-01-31

Description

Jan. 31, 1933. 1.. EMANUEL! I 1,895,983

APPARATUS FOR DEGASIFYING LIQUIDS Filed Sept. 17, 1929 2/ la k Fig-3.

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. to such Patented Jan. 31, 1933 UNITED STATES PATENT OFFICE LUIGI murmur, 01mm,

APPARATUS. FOR DEGASIFYING LIQUIDS Application fled September :17, 1929, Serial 1T0. 893,231, and in Great Britain April 19, 1929.

This invention relateato apparatus for defisifying liquids. the installation and repair of electric cables in the field, oil and other fluidinsulatreplacement of faulty sections by new sections, it is frequently the case that lengths of cable are evacuated and impregnated with the insulating oil or compound in situ after they have been laid. It is important that the oil or other fluid insulating compound used for the various purposes just mentioned in the installation and maintenance of electric cables should be-as free as possible from dissolved gases. w The present invention has for an object to degasify in situ the oil or other liquid prior uses thereof. 7 It further has for its object the provision of a degasifier which is simple in construction, effective in operation, and in which no moving parts are used, thus avoiding all trouble incident to the use of packings for such parts.

An apparatus for efiecting the degasification of liquids such as oils or fluid insulataccording to the present ining compounds a pump for vention comprises a chamber,

continuously maintaining a vacuum therein, a device which receives the liquid to be de-. gasified from a source of supplyand, after mechanically dividing the same into fine par ticles, discharges it into the vacuum chamber where the entrained gases are liberated and subsequently removed by the vacuum ump, and a second pump for discharging degasified liquid from the vacuum chamber,

preferably at an increased pressure. The de- ,.vice (hereinafter called the atomizer) for discharging the oil in a finelydivided state into the vacuum chamber may suitably com- Ezise a number of metal members, which may in the form of a stack of metal rings, held in a fixed position between upper and lower heads, the rings being piled flatwise and slightly spaced apartby thin spacing means so as to form thin definite spaces for the passage of liquid, and thesaid rings being arranged to receive liquid at their central regions and to discharge the same at their peripheries in a finely divided state into the vacuum chamber. to be degasified is fed from a supply tank through a pipe passing through the vacuum chamber to the atomizer, the oil supply pipe passing on its way if desired, through a heater so as to raise th uid as it flows into the atomizer under the action of the vacuum in the vacuum chamber in'which the atomizer is located. As the space on one side of the rings of the pulverizer is open to the source of liquid supply (that is usually at atmospheric pressure) while the space on the other side of the rings is exposed to the effect of the vacuum maintained in the chamber by the vacuum pump, the liquid is continuously discharged into the vacuum chamber in a state of such fine divi- The oil or other liquid' e temperature of the liqsion that the removal of the gases therefrom walls, or by keeping it in special containers provided with flexible walls.

For a consideration of what I believe to be novel and my invention, attention is directed v.to the accompanying description andfthe claims appended thereto. 7 c

.In the attached drawing which is illustrative of my invention, Fig. 1 is a view in elevation of the degasifier with the associated parts shown diagrammatically for simplicl ty; Fig. 2 is a view in elevation of the atomizing device with certain of the parts in section, and with the clearances etween the rings exaggerated; Fig. 3 is a plan view, partly in section, of the same, and Fig. 4 is a diagrammatic view showing the character and arrangement of the spacers. i

5 indicates a cylindrical vessel which is preferably but not necessarily made of glass so that the condition of the fluid within it can be observed. It is sealed top and bottom by heads 6 and 7 which are united by rods 8 havin clamping means at their ends.

. Suitable pac rings are located at the ends of out between the rin the vessel and between it and the heads to form seals. I

Insidethe vessel is a device 9 for mechanically finely dividing the fluid which is to be degasified. 10 indicates a stand-pi e which rises above the level of the liquid in t e cham; bered vessel, and which is connected to any suitable motor-actuated vacuum pump, indicated diagrammatically at 11. The atomizer is mounted on the upper end of the pipe 12 which latter passes through the bottom head 7 of the vessel and enters the container 13 for the fluid which is to be treated. The container 13 is open to the atmosphere. The fluid in flowing from the container to the atomizer is or may be heated in any suitable manner, as for example, by the electric heater 14 which may be constructed in any desired manner.

The fluid in liquid form, after being degasified, is removed from the vessel by a pump 15 which may for simplicity be operated by the hand wheel 16. From the pump the fluid is discharged at a higher pressure, usually about atmospheric, to the receiver or barrel.

17. In the discharge pipe of the pump is located a non return valve, indicated at 18, which opens toward the container 17 when the'pump is operated, and also a pressure 1 gauge 18a.

19 indicates the base of the atomizer and is supported on the upper end of the pipe 12. Fitted in the base is a plate 20 and between it and the base is a chamber 21 which is common to all of the elements of the atomizer of which seven are shown. Each of theseele- .ments comprises a stack of thin metal rings tween each pair. In order to properly space them, thin copper wires 23 are bent in and as best indicated diagrammatically in ig. 4, three such wires being used and spaced 120 degrees apart. In Fig. 2 the spaces between rings are exaggerated in the interest of clearness of illustration. The rings are maintained in axial alinenient by a central member 24 which has a number of radial arms or fins 25, four being shown in the present illustration. Each member is bored centrally to receive a bolt 26 which unites the head 27 with the base plate 20 and which also holds the rings in their proper spaced relation. -The plate 20 and also the sub-plate mounted thereon have as many openings as there are stacks of rings, and located in each opening'is a perforated disk 28 which. in addition to forming a seat for the clamping bolts, permits fluid to flow upward from the chamber 21 into the center of the stack, from which it flows laterally between the rings and in so doing is finely divided.

On top of the vessel is a short pipe containing a valve 29 which pipe may be used to connect a second vacuum pump, or to admit air to break the vacuum in the vessel when for any reason it is desirable.

tion and due to which the air and other gases contained in the fluid being treated are freely liberated and subsequently removed by the vacuum pump. The liquid collects in the bottom of the vessel from which it is removed by the pump 15, while the foam or fog-like mixture, due to the reduction of pressure and the air and other gases, rises above it. In us-, ing the apparatus, the oil should be carefully filtered since any dirt held in suspension would tend to clog the fine clearances between the rings or even seal them.

What I claim as new and desire to secure by Letters Patent of the United States, is:

1. In an apparatus for the purpose described, the combination of a vessel having a chamber, a pump for continuously main taining a vacuum therein, atomizing means which comprises a plurality of rings which are piled flat-wise and are slightly spaced apart, the space on the inside of the rings being open to the source of liquid supply and that on the outer side to the effect of the vacuum within the chamber, and a second pump for discharging degasified liquid from the chamber.

2. In an apparatus for the purpose described, the combination of a vessel having a vacuum chamber with an atomizer located therein comprising upper and lower heads, a stack of parallel'members located between the heads, thin spacing means between the members to form definite spaces for the pas.- sage of l uid, the region on one side of the members being exposed to a source of liquid supply and that on the other side to the effects of the vacuum within the chamber, and {)neans for rem ving liquid from said cham-..

3. In an apparatus for the purpose described, the combination of a vessel having a chamber in which a vacuum is maintained, an atomizer located therein comprising upper and lower heads, a plurality of stacks of annular members held in fixed position betweenthe heads and t in spacing means for the members of each stack, all of said stacksv I chamber, and means for supplyingthe liq-' 'uid to be degasified to the said closed space the vacuum chamber, and means for removing liquid from said chamber.

4. In an apparatus for the purpose specified, the combination of a cylindrical wall, end heads therefor which with the 'wall define a chamber in which a vacuum is main tained, a tubular support extending through one of the heads and to which liquid is fed,

an atomizer located within the chamber and comprising a base mounted on the inner end of the support and provided with a chamber communicating with the interior thereof, stacks of rings piled fiatwise with small spaces between them and carried by the base, a head common to the stacks, a rod-like member extending through each of the stacks and head for clamping the rings in place between said head and base, and means located between the member and the inner surfaces of the rings to hold the rings against lateral displacement, said member and adjacent surfaces of the rings defining a longitudinal passage through which liquid flows to the spaces between the rings;

5. In an apparatus for the purpose described, the combination with a fluid tight vessel in which a vacuum is maintained, of

a liquid atomizer located therein and comprising a stack of annular members piled fiatwise, one above another, with spacing means between them, such spacing'means consisting of a plurality of thin wires each bent alternately in and out about the successive members, whereby restricted fluid passages between said members are provided, means for 5 holding the said members in co-axial relation, and means for supplying liquid to the interior of said stack. 1

6. Degasifying apparatus comprising a chamber in which a vacuum is maintained, and an atomlzlng devlce mounted in the upper part of said chamber, whereby the liquid issuing therefrom may fall toward the bottom of the chamber while subjected to the action of the vacuum, said atomizing device comprising a pair of flat surfaced rings horizontally disposed and secured together in parallel closely spaced relation, whereby a restricted annular passageway is provided between them, the space inside of said rings being otherwise shut off from said vacuum inside of said rings.

In witness whereof I have hereunto set my hand this tenth day of September 1929. LUIGI EMANUELI.