The invention relates to a high-
viscosity vacuum oil purifier which comprises an oil inlet pump, an oil
inlet valve, a coarse filter, a heater, a vacuum cylinder, an oil
discharge pump, a fine filter, a condenser and a
vacuum pump. The oil inlet pump is sequentially communicated with the oil
inlet valve, the coarse filter, the heater and the vacuum cylinder, an upper portion of the vacuum cylinder is connected with the condenser with the
vacuum pump, a lower portion of the vacuum cylinder is connected with the fine filter via the oil
discharge pump, a
sedimentation chamber is formed between the heater and the vacuum cylinder, and a
sediment discharging valve is arranged at the bottom of the setting chamber. High-
viscosity oil containing water, gas and
impurity is purified by combined actions of the
sedimentation chamber and the vacuum cylinder. The water, the gas and the
impurity in the oil are quickly removed under water-cooling
sedimentation and vacuum conditions, demulsification is improved, and quality of the oil is comprehensively improved. The high-
viscosity vacuum oil purifier can be operated online, drain away water without a halt, enable
waste oil to reach standards for unused oil, and is simple and convenient to operate.