Acid return safety device for acid tank of ceramic filter

The utility model discloses an acid return safety device for an acid tank of a ceramic filter. The acid return safety device comprises a centralized acid supply tank, a middle acid tank and a small acid tank communicated with the ceramic filter, the concentrated acid supply tank is located below the middle acid tank and the small acid tank, and a discharge port of the concentrated acid supply tank is communicated with a feed port of the middle acid tank through a first acid supply pipe; an overflow port of the intermediate acid tank is communicated with a first reflux port of the concentrated acid supply tank through a first overflow acid reflux pipe, and the overflow port of the intermediate acid tank is lower than the highest position of the small acid tank; and the feed port of the small acid tank is communicated with the discharge port of the middle acid tank through a second acid supply pipe. According to the technical scheme provided by the utility model, the first overflow acid return pipe is arranged