Development And The Oretical Research Of Suction Filter

Suction Filter is a new type of filtration and separation machine. Its features are simple structure, high automation, no interruption of downstream flow during flushing, continuous flushing and high efficiency. It can be used in industry, irrigation and municipalities.This thesis is concentrated on structural design, filtering mechanisms study and analysis of flow field, the overall structure of the Suction Filter is figured out.The Suction Filter includes filtration part and transmission part. The filtration part includes pressure vessel, filter cylinder, suction scanner. Required by chemical process, there are large openings on the shell of the pressure vessel, so it is important to analyze the stress intensity and deformation of the pressure vessel with ANSYS and method of analysis design. The echelon-shaped wire of filter cylinder is easy to back washing, but has complicated structure, so using ANSYS to analyze it.The filtering mechanism of Suction Filter has been studied in this thesis. Base on the Darcy classical formula about filtration, pressure decline produced by filtrating medium and solid particle during filtration is estimated. According the sedimentation theory, the ability for carrying solid particles is also studied when back washing. The result is compared with The CFD simulation by CFX software.Suction scanner is an important part of self cleaning filter. By using CFX, simulates the flow field of the medium inside the Suction Filter, then analyses the distribution of the pressure and velocity. As the several changing of structure form, studies the variety of the flow field in the suction scanner, then optimize the design of the suction scanner.