The anchor stirrer has a simple structure and is suitable for stirring fluids with viscosity below 100 Pa · s. When the fluid viscosity is between 10 and 100 Pa · s, a transverse blade can be added in the middle of the anchor propeller, which is a frame stirrer, to increase mixing in the container.
The shape of the outer edge of the blade should be consistent with the inner wall of the mixing tank, with only a small gap between them, which can remove viscous reaction products attached to the tank wall or solid matter accumulated at the bottom of the tank, and maintain good heat transfer effect. The peripheral velocity of the blade edge is 0.5-1.5m/s, which can be used to stir Newtonian and quasi plastic fluids with viscosity up to 200Pa · s (see viscous fluid flow). However, when stirring high viscosity liquids, there is a large stagnant zone in the liquid layer.