Quartz sand pickling purification process and purification device

The invention discloses a quartz sand pickling purification device which comprises a tank body, a filter barrel and a driving assembly arranged under the filter barrel, the driving assembly has a first stroke and a second stroke; in the first stroke, the driving assembly drives the filtering barrel so as to scrape the inner wall of the filtering barrel; in the second stroke, the driving assembly drives the filtering barrel so as to filter impurities in the filtering barrel; according to the invention, the filter vat is driven by the first stroke and the second stroke in the driving assembly to reciprocate in the direction perpendicular to the bottom surface of the tank body, so that the cleaning assembly in the filter vat is driven by the driving assembly to scrape filtered impurities or suspended solids, and the scraped suspended solids or impurities are conveyed to the collecting assembly through the cleaning assembly and are collected; suspended matters or impurities separated from the tank body are cleane