TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Device: In the device. the turning devices are spiral augers or spiral reamers; there is at least one row of spiral augers, and two spiral augers in each row at least; the spiral augers are arranged and mounted regularly, or they are arranged and mounted in a partially regular and partially irregular manner; the spiral augers are arranged and mounted in a completely irregular manner, or are all mounted vertically, or are mounted in a partially vertical and partially inclination manner; the spiral augers are all mounted in an inclination manner; the spiral augers are driven by coupling of two or more drive units or by each drive unit singly. The air supply device is a fan, an air compressor, or high-pressure air collector. The main ventilating pipe is provided with a main regulating valve; the main ventilating pipe is connected to the branch ventilating pipes directly, or by a ring flange, or movably by a through screw; or they are welded directly; the main ventilating pipe is connected to the branch ventilating pipes by two or more secondary ventilating pipes; a secondary regulating valve is installed between the main ventilating pipe and the secondary ventilating pipe; the branch ventilating pipes are connected to the secondary ventilating pipe by ring flanges, or they are welded directly, or movably connected by a through screw. There is at least one row of branch ventilating pipes, and at least one branch ventilating pipe in each row; the vertical section of the branch ventilating pipe is elliptical, prismatic, circular or streamline-shaped; the branch ventilating pipes are only mounted between two adjacent rows of the spiral augers or mounted on the two outer sides simultaneously; or mounted between two adjacent rows of the spiral augers and mounted on one of the two outer sides simultaneously; or mounted on the two outer sides of the two rows of spiral augers simultaneously; or only mounted on one outer side of two outer sides of the two rows of spiral augers; the branch ventilating pipes are arranged and mounted regularly or irregularly; the branch ventilating pipes are all mounted vertically, or in a partially vertical and partially inclination manner, or are all mounted in an inclination manner.