Absorbent water battery set up in the vat of oil transformers

At oil transformer coils made by paper insulation, the present of water in paper lead to insulation demotion and electric faults. In the vat of transformers, at ambient temperature, the water migrates from oil in the isolation paper. The water in paper is distributed uniformly. At present times, for extracting the water from the isolate paper of coils conductors, with transformers in function, most used method consist in heating oil at 60-70 Celsius degrees, and after, when the water migrate from paper in oil, treating the oil to extract the water online in special installation outside the transformers. But, heating the oil at 60-70 Celsius degrees means to heat also the conductor's isolation with the possibility to deteriorate the paper qualities. One solution for this problem could be to set up an absorbent water battery in the vat of transformers. So, the water inside the transformer will migrate in papers insulation coils but also in the absorbent water battery. If the quantity of coils paper is equal with the quantity on paper of battery, only 1/2 of water will migrate in paper insulation coils.