According to existing research results, the main performance indicators of a wire mesh demister include total pressure loss and separation efficiency characteristics. This paper focuses on the total pressure loss performance of a wire mesh demister. Through reasonable simplifications and a large number of numerical simulations, the influence of three factors on the total pressure loss characteristics of a wire mesh is obtained. The mathematical model of the total pressure loss characteristics of the wire mesh is established using the multiple regression method, which provides a basis for the performance optimization design and manufacture of the wire mesh mist eliminator.

Many factors affect the total pressure loss performance of the wire mesh mist eliminator, including air velocity, wire diameter, layer spacing, mesh layer number, and mesh parameters. Of these, this paper considers three main factors, namely wire mesh diameter, layer spacing, and mesh parameters (i.e., metal wire filling density). The wire mesh mist eliminator is generally composed of a multilayer wire mesh, and the wire mesh in each layer is interlaced with each other; hence, model establishment and numerical simulation face many challenges. In this paper, a reasonable model simplification method is proposed, and the experimental data on wire mesh resistance are obtained by building a wire mesh resistance test bench. On this basis, the influence of different wire mesh diameters, layer spacing, and mesh parameters on the total pressure loss characteristics of the wire mesh mist eliminator was studied. The results were fitted by multiple linear regression theory, and the total pressure loss characteristic equation was obtained. At the same time, the accuracy of the regression equation was verified using an experimental method.

Through a numerical simulation method, the influence of the three variables of different wire mesh diameters, layer spacing, and mesh parameters on the total pressure loss characteristics of the wire mesh demister is obtained: the change of wire mesh diameter d has the greatest influence on the resistance coefficient, the change of mesh parameter l is the second, and the change of layer spacing h has little influence on the resistance coefficient, that is, d > l > h. By comparison, it is found that the total pressure loss obtained by the regression equation is very close to the experimental value, the average error is only 5.56%, and the fitting degree is very high, which indicates that the regression equation has high accuracy and meets the needs of engineering practice. It can provide a basis for the design and improvement of the wire mesh mist eliminator in the future.

In this study, a wire mesh resistance test bench was built, and the experimental and numerical simulations of wire mesh resistance were carried out. The prediction method of the wire mesh resistance coefficient was obtained by linear regression analysis. By employing a relevant simplification method, a numerical simulation method is obtained to simplify the three-dimensional model of the wire mesh condenser into a two-dimensional model, which can simplify the complexity in the numerical simulation of total pressure loss characteristics. Through linear regression analysis, a multivariate linear regression equation based on the three variables of mesh diameter, mesh parameters, and mesh layer spacing was obtained. The resistance coefficient obtained by this formula is in good agreement with the results of the numerical simulation, which can provide a basis for the future design of the wire mesh mist eliminator.