Development And Research Of Rotary Press Filter

Rotary press filter is a new type of dewatering machine. It has a simple structure, a big range of treatment, high dewatering efficiency and a small occupied area. It can be used in many fields, such as sewage treatmene, solid-liquid separation in food and medical industries. Now it is designed by ourselves after studying technologies from foreign countries. In this paper, a rotary press filter, the first machine with a diameter of 1200mm in China, is discussed. Compared with the present machines, it has some innovation in its structure. As a result, it has a larger dewatering capacity, higher dewatering efficiency and lower cost.The rotary press filter includes filtration part and transmission part. The filtration part is designed according to its dewatering capacity and pressure from inlet to outlet. Dewatering disc is a major part of the rotary press filter. It has a complex structure with many pores and multiple loads. The structure of the disc determines the capacity and dewatering efficiency of the filter, so it is important to analyze the stress intensity and deformation of the disc with ANSYS and method of analysis design. The main design of transmission part is the selection and remodeling of reducer with the transmission ratio according to the rotational speed of filtration part. And its output axis is designed and checked for its intensity.The service test of the rotary press filter is introduced in details. It achieves the goal of successful dewatering, and proves the rationality of the design. The problems present are analyzed and discussed, and preventative measures are proposed. Meanwhile, a new work flow is designed in order to get a better test result.In the end, after a comparison of many designs, orthogonal design is chosen to analyze the factors which affect the stress intensity and mass of the disc. The major factor and the minor factor are found in certain conditions. Finally, an optimum model of the disc is obtained by overall balance analysis and it has less mass in the premise of guaranteeing its stress intensity.