Study On The Mechanical Properties Of Self- Cleaning Air Filter’s Steel Structure Based On Finite Element Method

The self-cleaning air filter is widely applied in the industries of steel, petrochemical and power plant, ect because of its characteristics of high filtration precision, high space utilization rate, good energy saving, longer filter cartridge service life, low maintain workload and the replacement work can be done during operation. The mechanical properties of self-cleaning air filter’s steel structure is of decisive importance in the stability of self-cleaning air filter. So it is significant to study the mechanical properties of self-cleaning air filter’s steel structure. This thesis is targeted on the typical self-cleaning air filter as a major research object.Analyze the material selection of the main product type MFS-2500 self-cleaning air filter by using different material of steel structure to establish self-cleaning air filter’s steel structure model according to the regulation of application temperature of carbon steel, low alloy steel and high-alloy steel. Using finite element method to simulate wind load, snow load and earthquake load to obtain the inference of the steel structure to study the whole process by using the mode analysis, semic mechanical property analysis and mechanical property stability analysis. The main working content is as follows:1. Calculates the vibration period value of structure of S235 JR and S355JR material by using Solidworks modal analysis and comparing with theoretical formula value, the two results are quite close. The errors are very small. The standard formula and finite element calculation results match well. It proves the high reliability of the finite element method for fundamental vibration period in the calculation of steel structure. The analysis method and the relevant parameters can provide reference for the analysis of this kind of structure.2. Based on the finite element method for steel structure seismic analysis, the Von Mises stress and displacement of the steel structure of S235JR and S355JR material are obtained. The results show that the strength and stiffness under the most unfavorable conditions satisfied the requirements of the specifications. It describes that strength is not failed caused by the material’s yield and structure’s stiffness is not failed caused by deformation. The Structure design is safe and reliable.3. Steel structure model of S235JR and S355JR material of stable performance analysis are performed. The structure of the first 10 order buckling mode and the stability safety factor are obtained. The results show that although the stable safety parameters are meeting the standard requirement, the structures of two kinds of materials at the top are the weak layer. Bending stiffness is low. The design needs enough attention in the future.4. Because the environmental temperature in project site of Xinjiang area is low. The air filter of original MFS-2500 type structure can not meet the special field condition. So this thesis developed electrical heater in front of the filter inlet.And the electric heater process strength is calculated by using SW6 software to design a reasonable size of electric heater and use the thermodynamic formulas to calculate the power of the electrical heater. The local optimization is applied in the structural optimization design. The modal, semic and stability performance analysis for structure of S355JR material are carried out. The analysis results show that the optimization scheme meet the standard requirements in terms of strength, stiffness and static performance stability. The optimization approach can provide theoretical references for the future design of similar structure.Finally, this thesis summarizes the works and looks forward to the next step of works.