Ahpc Type Electric Composite Bag Dust Collector And Electric Field Simulation Theory Research

With the development of society, what attracts more and more attention is the importance of environmental problem to human beings, and electric-bag composite dust collector emerge as required as an effective dust emission control means. Among various collectors, the type of AHPC collector is the most potential technical one. This paper researched the mechanism of electric-bag composite dust collector and the distribution of the electric field under different model parameters with the purpose of deepening cognition of electric-bag composite dust collector, guiding the structural optimization of the precipitator and boosting its dust collection efficiency further.On the basic of theory and method of ESP and BF, the agglomeration of the charged dust and the charged dust layer on the surface of filter bag were investigated in this paper, and the synergistic effects between electric precipitation and bag dust removal working principles were discussed too. The two-dimensional models of the ectric-bag composite dust collectors were built and by means of the MATLAB PDE toolbox, the electric field analog simulation on physical model unit of the AHPC were done based on different corona polar diameters, distance between neighboring electrodes and precipitating plate apertures.Studies show that because of the synergistic effects between electric and bag dust separation, the performance of precipitator was strengthened. Negative charged dust agglomerated more, and it could raise the filtering efficiency by means of piling loosely and largening porosities to make a smaller lose of pressure. It could well evaluate the simulation results of electric-bag composite dust collector electric field by the maximum of electrical field strength and the value of non-uniformity coefficient. Through the calculation analysis, it showed that as the migration velocity and filtration velocity were definitive, it need a definitive plate-to-cloth ratio to get the definite static dust collecting efficiency, the corresponding relationship between the effective area of dust collecting board and filtration area provided the basis for optimizing combination between electric and bag dust separation at design time. Compared between analytic and numerical solutions, it showed that it was dependable to solve the electrical field distribution of dust collector based on the MATLAB PDE toolbox. Based on the simulation results of the. AHPC electric-bag composite dust collector electrical fields, it showed that there would be a better electric field performance as corona polar diameter was4mm and distance between neighboring electrodes was196mm, the electric potential on the orifice would be higher as precipitating plate aperture was bigger. When opening rate is certain,it is better when the aperture is smaller, the precipitating plate could protect filter-bag efficiently against damages of corona discharges and get a more homogeneous air-flow distribution. Electric-bag composite dust collector has the advantages both of electric and bag dust collector, it can make the dust allocate reasonably when dust is removed and cleaned. It is a simpler, more visual and cheaper method to get electric-field distribution based on the MATLAB PDE toolbox than experimental study and numerical simulation of computer program, in this way, it can provide basis for the choices of corona polar diameter, line-spaces and precipitating plate aperture at design and modification time.