Stirring for stainless steel stirred tanks can be divided into three broad categories: mechanical agitation, aeration agitation, and canister external agitation.
1. Mechanical stirring
Mechanical agitation relies on mechanical force to input energy inward to produce an agitating effect, which is the most common form of agitation. The machine includes a stirring blade, a stirring shaft, and a stirring motor. The main factors affecting the mechanical effect are the stirring speed, the stirring blade switch and the internal structure of the reaction tank.
Effect of stirring speed on stirring effect Generally speaking, the larger the stirring speed, the better the stirring effect, but the stirring speed is too large, it is easy to form local eddy current near the stirring, increase energy consumption and reduce the stirring effect. Therefore, there is an optimum value for the agitation speed, which needs to be determined experimentally.
Effect of stirring leaf switch on stirring effect The switch of the stirring blade affects mixing efficiency: under the same input power, the shape of the stirring blade is different, and the stirring effect is different. There is a variety of mixing leaf switches, each with advantages and disadvantages, suitable for different occasions.
The influence of the internal structure of the reactor on the stirring effect The third factor affecting the mechanical stirring effect is the internal structure. In order to improve the stirring effect, various devices are often added inside, such as a baffle, a draft tube, a plurality of stirring blades coupled to the shaft, and a special shape of the bottom of the tank.