Title of Invention

AN APPARATUS FOR RECLAMATION OF TRANSFORMER OIL

Abstract

"An apparatus for reclamation of transformer oil". i This invention relates to an apparatus for reclamation of transformer j oil. The apparatus enables reclamation of oil at the site where required (thereby minimizing downtime of the transformer and saving efforts and co4t of oil transportation. The apparatus comprises a gear pump which is connfected to transformer, a plurality of inter-connected ionic reaction columns filed with korvis fuller's earth, a heater vessel, two filter vessels, a compressor, a degassing 'f chamber, a centrifugal pump and two vacuum pumps.

Full Text

FIELD OF INVENTION *V This invention relates to an apparatus for reclamation of transformer oil. PRIOR ART Insulating oil in transformer acts on both dielectric and coolant, ii'or this purpose it is essential to have certain electrical and thermal properties. The requirements are good electric strength, high resistivity, low electric dislsipation factor, low acidity and high intratacial tension. During operation of the transformer due to continuous heating and constant contact with coniStruction materials like copper, paper, press board and core materials etc., the oil quality deteriorates. j The amount of deterioration of products like organic acids, sludge, low nrlolecular weight hydrocarbon gases and moisture increases the accumulation |of these products which deteriorate the oil which in turn can cause damage/failure of transformer. Further the preventive or productive maintenance of oil discloses^ serious problem of moisture, combustible gases and/or oil decay products. j OBJECTS OF PRESENT INVENTION Therefore, an object of this invention is to propose an apparatus for redlamation of transformer oil having applications such as for reclamation of transformer oil at the site. Another object of this invention is to propose an apparatus for reclaiiiation of transformer oil, which avoids transformer down time. J ? Yet another object of this invention is to propose an apparatus for reclamation of i transformer oil, which avoids oil transportation. J ! ! A still further object of this invention is to propose an apparatus for reclamation of \ transformer oil which has better .throughput, lower dead volume, is energy efficient and j has minimum wastage of oil. i STATEMENT OF INVENTION | ' I According to this invention there is provided an apparatus for reclamation of transformer oil comprising:- I i ■ } (a) a gear pump with inlet adapted to be connected to the output of the | i transformer through ball valve, magnetic strainer and a non-return ; valve, wherein said magnetic strainer comprises a wire mesh and a i magnet; (b) a plurality of rows of ionic reaction columns secured to each other in I series through respective gear pumps and ball valves the inlet of the ; said reaction columns being connected to the outlet of a heater vessel = and ball valves being connected in parallel with the said pumps \ respectively, wherein the said reaction columns are filled with korvis l fullers earth; i (c) a heater vessel with its inlet connected to the outlet of said gear pump and outlet of the said heater vessel being connected to the inlet of said i i reaction columns the inlet of the said heater vessel being provided with J a control panel; : (d) two filter vessels, the inlet of the first filter vessel being connected to | the outlet of rows of said columns through valves, the outlet of said | first filter vessel being cormected to the inlet of second filter vessel through ball valves wherein the outlets of said first filter vessel and the; outlets of said second filter vessel are commonly connected with each ^ other through ball valves, the common point of the outlet of said first filter vessel ; and said second filter vessel being connected to the gear pump through ball valves and wherein further the said firist filter vessel is connected | with a compound gauge and the said second filter vessel is connected I with a pressure gauge; (e) a compressor connected to the outlet of said first filter vessel through an air relief valve and ball valve; ; (f) a degassing chamber with its inlet connected to the outlet of said j second filter vessel through ball valve and non-return valve and ; wherein said degassing chamber is provided with a level monitor; j (g) a centrifugal pump with its inlet connected to the outlet of said | degassing chamber and the outlet of said centrifugal pump being '■ connected to the inlet of the transformer through a non-return valve and ball valve; (h) two vacuum pumps connected to the inlets of said degassing chamber \ through the sav valves and ball valves and a vacuum gauge connected ■ to the common point of the sav valve and ball valve. Further, a dial thermometer is provided between the non return valve and ball valves for measuring the temperature of the reclaimed transformer oil. A vacuum pump is; connected to the degassing chamber through the respective sav valve and ball valves for creating vacuum in the device. A vacuum gauge is provided with said vacuum pump for measuring the vacuum created in the degassing chamber and the device. The impure: transformer oil is passed through the adsorption column filled with natural adsorbent \ clay. Reference to clay as filtration media is only by way of example. A plurality of! filters for coarse and fine filtration are provided in the system to ensure filtration of solid particles. Evacuation of the degassing tank causes the water content of the oil tof evaporate. The water vapour and air released by the oil are extracted out from the| degassing tank by the vacuum pumps. Inside the degassing tank, the oil is distributed and! directed through ranching rings columns. A vacuum pumping system is provided toj evacuate the transformer, which is essential for o site condition of the transformer. Thei apparatus of the present invention allows the transformer to be dried at site. DESCRIPTION OF FIGURES The invention will now be illustrated with drawings, which are an illustrative i embodiment of the present invention and are not intended to be taken restrictively to imply any limitation on the scope of the present invention. In the accompanying drawings;- Fig.l shows the plan view of the device. DESCRIPTION OF INVENTION W.RT DRAWINGS Referring to the drawing, the apparatus of the present invention has a gear pump (4) adapted to be connected to the outlet of the transformer (not shown) through a ball valvfe (1), magnetic strainer (2) and a non return valve (3). The outlet of the gear pump (4) is connected to the inlet of a heater vessel (6) through ball valve (5). A control panel (10) is connected to the heater vessel (6) for controlling temperature etc. in the heating vessdi. The outlet of the said heating vessel (6) is connected to a plurality of rows having ia plurality of ionic reaction columns (11) secured with each in series through the respective: s cT gear putnp (8,15) and ball valves (7, 13, 14) respectively. Ball vahres (9,16) are connected in parallel with the pumps (8, 15) respectively. The outlet of the rows of columns are connected to the inlet of a first filter vessel (19) through the { valves (12,17,18) respectively. The outlet of the first filter vessel (19) is ; connected to the second filter vessel (25) through the ball valves (22,24). A [ compound gauge (21) is connected with first filter vessel (19) and a pressure gauge (26) is connected to a second filter vessel (25). A compressor (51) is | connected to the outlet of the first filter vessel through an air relief valve (50) | and a ball valve (49) for reverse cleaning of the filter packs provided therein. The | outlet of the second filter vessel (25) is connected to the inlet of a degassing | chamber (30) through ball valve (28) and non return valve (29). Tlie outlets of| the first filter vessel (19) and second filter vessel (25) which are commonlyj connected with each other through the ball valves (28, 47, 23, 22). The outlet of| second filter vessel (25) is connected to inlet of first filter vessel (19) through! i ball valves (28, 47, 46 ,18). A centrifugal pump (44) is connected to the outlet of the degassing chamber (30). The outlet of the centrifugal pump (44) id connected to the inlet of the transformer through a non return valve (43) and ball valve (40). The common point of the outlet of the second filter vessel (25) and the first vessel (19) are connected to the gear pump (4) through the ball valves (54, 55). Vacuum pumps (34 85 36) are connected to an inlet of the degassing chamber through the sav valve (33 & 35) and ball valve (37, 32). A vacuum gauge (57) is connected to the common points of the sav valves (35) andballvah?e(32). The magnetic strainer (2) comprises a wire mesh and a magnet (not showri) provided for arresting the metal particles and solid contaminants present in this transformer oil. The ball valve (1) is provided to control the flow of the oil. Thfe non return valve (3) is provided to stop the back flow of the ofl to the transformer from the pump. The adsorbent columns (11) ere filled with korvis earth. The first filter vessel (19) comprises a plurality dp 0 of filter packs disposed in a container having an inlet and outlet. The second filter vessel (25) is provided to arrest all kind of fine particles even of one micron and comprises a cartridge type filter non-hygroscopic. The degassing chamber is provided to withstand very low pressure and temperature. The degassing chamber comprises rashing column to| expose the oil to maximum and also to increase dwell time. The degassing chamber is provided to remove the moisture and gases through the degassing chamber with the helfi of vacuum pumps (34,36). The level monitor (53) is provided in the degassing chambef (30) for the detection of oil/foam level incorporated in the degassing chamber to stop inlet oil pump, when the oil level reaches high in the degassing chamber and thus the oil increases into vacuum pump is prevented. The level monitor is preferably an optical levea monitor. The compressor (51) is provided with first filter vessel for cleansing the filtelr pack on the principle of reverse cleaning. The gauges (21, 26) are provided to indicate th^ conditions of the filters packs and filter cartridge and when they are choked. The control panel (10) is provided to control the various components of the heater vessel (6) and is provided with audio signals. During the operation of the apparatus all the valves in oil and vacuum line and creatidn valve are closed and all the switches in the control panel are switched off. Subsequently the gear pump (4) is switched on and also the switches on the control panels are switched on. The metal particle and the solid contaminants are removed by the magnetic strainer. The oil conveyed to the heating vessel is heated and the hot oil is pumped through adsorption columns with the help of the booster pumps. The oil fi-om the adsorptidn column is passed throu^ first and second filters wherein the coarse and fine particles hnpurity are filtered. The filtered oil is then passed through the degassing chamber and wherein the moisture and the gases are removed fi-om the oil with the help of vacuum /^ pumps. Thus the reclaimed oil is then conveyed to the transforiner by means of a centrifugal pump. Pressure gauge, compound gauge are provided to jindicate the condition of the filter pack and filter provided in first and second filtlers. The vacuum,gauge is provided to measure the vacuum in the degassing chamber as well as the transformer during the transformer evacuation.. The liqUid level controller is provided in the degassing chamber to indicate the level of the oil in the degassing chamber. The impure and adsorbed transformer oil beconies fresh and reclaimed oil. It is to be noted that present invention is susceptible to modifications, jchanges and adaptations by those skilled in the art. Such,. variant embddiments incorporating the concepts and features of the present invention, are intended to be within the scope of the present invention ■ -8- WE CLAIM: 1. An apparatus for reclamation of transformer oil comprising:- (a) a gear pump (4) with inlet adapted to be cormected to the output of the transformer through ball valve (1), magnetic strainer (2) and a non-return i valve (3), wherein said magnetic strainer comprises a wire mesh and a I magnet; (b) a plurality of rows of ionic reaction columns (11) secured to each other in series through respective gear pumps (8, 15) and ball valves (7, 13, 14) the inlet of the said reaction columns (11) being connected to the outlet of a \ heater vessel (6) and ball valves (9, 16) being cormected in parallel with the said pumps (8, 15) respectively, wherein the said reaction columns are filled with korvis fullers earth; (c) a heater vessel (6) with its inlet connected to the outlet of said gear pump (4) and outlet of the said heater vessel (6) being connected to the inlet of; said reaction columns (U) the inlet of the said heater vessel (6) being \ provided with a control panel (10); (d) two filter vessels (19, 25), the inlet of the first filter vessel (19) being connected to the outlet of rows of said columns (11) through valves (12, 17, 18), the outlet of said first filter vessel (19) being connected to the inlet of second filter vessel (25) through ball valves (22, 24) wherein the outlets of said first filter vessel and the outlets of said second filter vessel are commonly cormected with each other through ball valves (28, 47, 23, 22),; the common point of the outlet of said first filter vessel and said second filter vessel being connected to the gear pump (4) through ball valves (54, 55) and wherein further the said first filter vessel is connected with a compound gauge (21) and the said second filter vessel is connected with a pressure gauge (26); (e) a compressor (51) connected to the outlet of said first filter vessel (19) through an air relief valve (50) and ball valve (49); (f) a degassing chamber (30) with its inlet connected to the outlet of said second filter vessel (25), through ball valve (28) and non-return ; valve (29) and wherein said degassing chamber is provided with a ; level monitor (53); (g) a centrifugal pump (44) with the inlet connected to the outlet of | said degassing chamber (30) and the outlet of said centrifugal { pump (44) being connected to the inlet of the transformer through ■ a non-return valve (43) and ball valve (40); (h) two vacuum pumps (34, 36) connected to the inlets of said j degassing chamber through the sav valves (33, 35) and ball valves [ (37, 32) and a vacuum gauge (57) connected to the common point of the sav valve (35) and ball valve (32). : 2. The apparatus for reclamation of transformer oil as claimed ini claim 1 wherein said level monitor (53) is preferably an optical level 1 monitor. 3. The apparatus for reclamation of transformer oil as substantially i described and illustrated herein. r . . . ■ ■ f

Documents:

0267-che-2004 abstract.pdf

0267-che-2004 drawings.pdf

0267-che-2004 claims.pdf

0267-che-2004 form-1.pdf

0267-che-2004 form-18.pdf

0267-che-2004 form-2.pdf

0267-che-2004 form-3.pdf

0267-che-2004 complete specification as granted.pdf

0267-che-2004 correspondence others.pdf

0267-che-2004 correspondence po.pdf

0267-che-2004 description(complete).pdf

0267-che-2004 power of attorney.pdf