Rinsing and purifying device and method for pentaerythritol

The invention relates to a rinsing and purifying device and a method for pentaerythritol. The rinsing and purifying method is characterized by comprising the following steps: (1) feeding a pentaerythritol crystalline liquid into a rinsing tank, adding washing water into the rinsing tank, controlling the liquid level of the rinsing tank to keep overflow all the time, and controlling the stirring speed to be 12-30r/min; (2) enabling liquid overflowing from the washing tank to enter an overflow tank, enabling materials at the bottom in the washing tank to enter a slide way through a bucket elevator, adding washing water into the slide way, and enabling the materials to enter a settling tank through the slide way; (3) controlling the stirring speed in the settling tank to be 12-30 r/min, enabling liquid overflowing out of the settling tank to enter an overflow tank, enabling materials at the bottom of the settling tank to enter a scraper machine and then to be fed into a belt filter to be filtered, and taking fil