Rectification system and method for high-purity triethyl aluminum

The invention relates to the technical field of separation and purification of precursor products, in particular to a rectification system and method for triethyl aluminum. The system comprises a self-circulation system, a reverse cleaning and filtering system, a rectification system and a nitrogen system, the self-circulation system comprises a crude product buffer tank, a first circulating pump and a first filter; the reverse cleaning and filtering circulating system is connected to two ends of the first filter and comprises a white oil buffer tank, a second circulating pump and a second filter; the rectification system comprises a rectification tower, the top of the rectification tower is provided with a tower top condenser, a reflux ratio controller for controlling reflux, and a light component receiving tank and a refined product receiving tank which are positioned at the bottom of the reflux ratio controller, and bottom liquids of the rectification tower and the light component receiving tank flow into