The QG series pulse air flow dryer is a large-scale drying equipment that adopts the principle of instant drying. It uses the rapid movement of heat carrying air to drive wet materials and suspend them in the hot air. This strengthens the entire drying process and improves the rate of heat and mass transfer. The non bound moisture of the materials dried by the air flow can be almost completely removed (for example, the moisture content of starch and other materials in the feed is ≤ 40%, and the finished product discharge can be 13.5%), and the dried materials will not cause deterioration. The output can be significantly improved compared to the drying of the Wufan dryer, and users can achieve high economic benefits in the short term.