The invention discloses an environment-friendly oil immersed
transformer. The environment-friendly oil immersed
transformer comprises an
oil tank outer shell, an
oil tank inner shell, an iron core and a winding located at the center of the
oil tank inner shell, an oil purification device located at the two sides of the iron core and the winding and forms a cavity together with the sidewall of the oil tank inner shell, and a
noise reduction device located between the oil tank inner shell and the oil tank outer shell. The
noise reduction device comprises a
noise reduction interlayer and a cooling interlayer; the
noise reduction interlayer which adopts a
porous glass wool board has the closest distance to a noise resource and can absorb noise efficiently; as the
noise reduction interlayer is installed in the oil tank,
diffusion of
fiber fines can be avoided, and environment
pollution can be reduced; as the cooling interlayer is located between the oil purification device and the
noise reduction interlayer, the temperature of
transformer oil can be reduced efficiently; as the oil purification device is an enforced purification device arranged in the oil tank, the oil purification device comprises a first purifier used for filtering away
nonmetal impurities and a second purifier used for adsorbing
metal impurities and has no
air exchange with the exterior, the degree of purity of the
transformer oil can be increased; and as the noise reduction device and the oil purification device are in mutual coordination, the effect of giving consideration to noise reduction, oil purification and cooling is realized, and good environment-friendly and energy-saving performances are obtained.