According to the technologic process of the filter and the characteristics of the filter, interconnected control of the filter has been realized by way of distributed control and the Programmable logical controller(PLC)technology.

This paper describes the heat-resistance and other physical properties of the frame material made by modified polypropylene , and studied the change of its structure by FTIR spectrum, and reviewed the accelerating aging property, Izod impact strength, heat distortion temperature, flexural strength, melt flow rate, tensile strength, elongation at break etc.

In order to study the influences of the ultrasound on the dewaterability of the sludge,the combination of ultrasound technique and flocculant(PAM) was used for the sludge dewatering by plate-frame pressure filtration.

Based on the backgroud of existing problems of particles suspension in the present national chemical and medical industries, the maxblend glass lined plate frame impeller (MGI) was developed.