静电收集数学物理模型及效率公式的研究

Study on Mathematical and Physical Model and Collection Efficiency Formula of Electrostatic Precipitators

本文利用微元法,基于紊流传质理论,建立了粒子静电收集的数学模型。根据静电除尘器中浓度不均的实验结果,确立了新的边界条件。通过边界条件得到了粒子有效驱进速度的表达式,We=-1/c((?)c/(?)x)Vb.由数学模型的解导出了粒子在静电除尘器中的收集效率公式,此式比Deutsch效率公式在指数上多一个F因子。由效率公式得到的粒子另一有效驱进速度表达式和We=-1/c((?)c/(?)x)Vb是致的。

A mathematical and physical model of electrostatic precipitation is established, according to the turbulent transfer theory and by using the differential volume element method.Meanwhile, a new boundary condition is determined on the basis of the nonuniform particle concentration observed in ESP; the particle effective migration velocity, We= Vb, is therefore derived. Again, a collection efficiency formula of the ESP, is obtained from the solution to the mathematical model. Compared with Deutsch efficiency formula, it has a special F factor in the exponent. The particle effective migration velocity, We = Fw, resulting from the efficiency formula, agrees with the formula,