Numerical Research On Cyclone Separator's Separating Efficiency Model Based On CFD

Cyclone separator, A kind of gas-solid separating equipment, is widely used in many fields such as chemical engineering,metallurgy, environmental protection, architecture and other industrial department. With the development of industry and highly requirement form the environment protection, even higher quality and efficiency should be owned by the separator. However, the traditional design ways upon experiment and experiential-formula can't satisfy the requirements sufficiently. CFD, short for computational fluid dynamics, as a new designing method play a important role on studying high quality cyclone separator. But the investigation on the separation efficiency of separator with the CFD is seldom and couldn't estimate and forecast its efficiency properly. In this thesis, flow in cyclone separator is simulated by using of FLUENT and validate its result with experimental data. Through the analysis of flowing path form the different position of inlet, the principle particle loop shapes at the top of the separator is uncovered and made a conclusion to the efficiency influenced by the air flow form different position of the inlet. A experiment research is made to testify that conclusion and some advice is afforded in the end.Concrete trajectory model is used to simulate the particle's movement in separator, A new concept named mass arithmetic using for calculating separating efficiency is afforded and the calculating result with this method is contrast to the experimental data. Then another arithmetic named wall-factor mass arithmetic that could refine the primary one is also added. For checking the turbulence effect onto the particle trajectory, the random trajectory model is applied. After analyzing the pulse effecting to the particle, the notion of probability and statistics is introduced to the efficiency calculating and form the probability integration arithmetic, all the calculating results of the three arithmetic for separating efficiency are testified by the experiment data .then the range, the limits, the qualification and trend of applying these arithmetic is concluded by the thesis.