Shevchenko O. Determining parameters of a filtering machine utilizing the pulsating pressure for dewatering deep-water organic-mineral sediments

As a result of theoretical and experimental investigations of the process of dewatering deep-water organic-mineral sediments with a filtering machine utilizing pulsating pressure, the following main parameters of the machine were established: static and dynamic components of the pressure, the frequency of the pressure pulsation, the duration of the filtration, as well as dependences of these parameters on parameters of the filtration, namely, on the moisture of the material, the suspension layer thickness, and physical-and mechanical properties of the suspension. The following techniques were developed: of the experimental investigation of the process of filtering the fine suspension with a filtering machine utilizing both static and dynamic pressures; of the experimental data processing; of determining parameters of the filtering machine for dewatering deep-water organic-mineral sediments utilizing the pulsating pressure; of determining parameters of the filtering machine equipped with a screw for unloading the dewatered material. The design of the filtering machine utilizing the pulsating pressure for dewatering the fine suspension equipped with a screw for unloading the dewatered material was developed; a utility model patent was obtained. The results of laboratory investigations on dewatering deep-water organic-mineral sediments under the static and dynamic pressures, as well as properties of the suspension and its particles size distribution are given. Rational design and operation parameters of the filtration machine for dewatering deep-water organic-mineral sediments to their moisture of 45-50 % are determined. It was established that the efficiency of dewatering the deep-water organic-mineral sediments with the filtering machine utilizing the pulsating pressure with the frequency of 20 Hz is app. by 40% higher in comparison with the static mode; for the frequency of 60 Hz this value is above 58%.