At present industrial application of precipitator, traditional mechanical type dust collector although has has the advantages of simple structure, low cost, convenient maintenance and so on, but there is a easy to wear and the disadvantage of low efficiency; filter type dust collector, although with a very high efficiency, but the resistance is large, running costs high, and often replace the filter bag, maintenance cost is higher; wet dust collector with high efficiency, but it covers an area of large, high energy consumption and low will produce secondary sewage; ESP also has the characteristics of high efficiency of dust removal and low energy consumption, but its main drawback is a large steel consumption, covers an area of large, high initial investment.
Recently, foreign patent products appeared a "aerodynamic dust collector", with a mechanical dust removal device has the advantages of simple structure, low cost, convenient maintenance and so on. At the same time, also has high dedusting efficiency, and small running resistance and energy consumption performance are improved greatly.
Loop cascade aerodynamic dust collector is a reference to foreign advanced technology, use of advanced modern computational fluid dynamics calculation method, after a lot of two-phase flow theory and experimental research, in the traditional inertial dust catcher foundation developed "ring cascade aerodynamic dust collector". Currently the product has been the national patent. In order to design products with excellent performance, of dust particles and gases in the precipitator movement process numerical simulation is one of the essential means and simulation involves the calculation and analysis of the movement of solid particles in turbulent airflow. Study of gas - particle two phase flow, like the model and methods are as follows:
(1) Euler Lagrange model or particle trajectory model.
(2) two fluid model or Euler method. These two models so far have been widely used and each has its advantages and disadvantages. Euler Lagrange method because it can directly give more particles phase information has been widespread concern; Euler method is due to the computing of the economy and in some cases for gives better prediction results has been paid more and more attention. However in certain circumstances, such as the particle size of particle phase along the orbit change that single particle size distribution assumption is not appropriate, the Euler Lagrange method should be regarded as preferred. In order to obtain more particulate phase information, the Euler Lagrange method to.
