How to choose the right stirrer, in can ensure the effective mixing of materials, consume the least power, low cost, easy to operate, reliable operation, easy to manufacture and maintenance?
We can from mixing, the requirement to the mixing operation purpose, such as a good process requires the convective circulation or a process requires strong shear force, and so on, and then analyze the function of the agitator, on this basis, can according to the mixing purpose to choose the type of agitator, can also be judged from the function of a blender it applies to the mixing process. All kinds of stirring process has a common requirement for stirring, and all kinds of agitator performance also has a common, which is often suitable for a certain kind of stirring operation may have several forms of agitator, and the same kind of agitator can also be used for several kinds of stirring process. Of course, strictly speaking, or each has its own advantages, such as viscosity, volume, speed range and so on, will affect the use of agitator effect.
At present, most of the selection methods are based on practical experience, choosing the customary paddle type, and then deciding the parameters of the agitator in the common range. There are also design methods of comparison and amplification through small tests to obtain data. No matter what kind of practice, are inseparable from the initial according to the purpose of stirring the choice of agitator type this step.
There are many materials for selection, but due to the complex factors affecting the stirring process, the emphases of each experiment are different, and the conclusions of each other are not consistent. If some information introduces a narrow application range of a paddle type, and other information introduces a wide application range. This also shows that in most cases the selection is not absolute, and the range of use is elastic. Selection should not only consider the purpose of the stirring process, but also consider the problem of power consumption. In achieving the same stirring effect, of course, do not want to consume too much power. And sometimes need to give greater energy in the mixing process, some stirrer but can do nothing, these will affect the selection of stirrer.
In addition, the structure of agitator is also a factor to be considered in the selection. Therefore, a complete selection scheme must meet the requirements of economy and safety.
