Tsiura N. Compatible process of filtering and drying of dispersed materials

This thesis on Candidate Degree in Technical Sciences: specialty 05.17.08 - Processes and the Equipment of chemical technology competition. - Lviv Polytechnic National University, Ministry of Education and Science of Ukraine. Lviv, 2021. The work deals with the filtration method for drying Fe (II) sulfate of heptahydrate, the exhausted wood flour and iron oxide pigment. This method has been elected as the most effective according to the critical analysis of literature data. The work is dedicated to the theoretical and experimental researches of filtration drying of dispersed materials, in particular Fe (II) sulfate of heptahydrate, the exhausted wood flour and iron oxide pigment for the purpose of designing of the energy saving equipment. The basic physical and mechanical characteristics of the stationary layer of the studied materials are determined, such as: bulk density, porosity, specific surface area, averaging of particles size, equivalent diameter of the channels through which the heat agent is filtered. Based on obtained experimental data of hydrodynamics research, the equations for establishing the hydraulic resistance of the stationary layer at variable parameters of the heat agent have been proposed. Heat transfer during filtration drying has been investigated experimentally and criterion dependences in the form of dimensionless complexes for determination of heat transfer coefficients from heat agent to Fe (II) sulfate heptahydrate layer are proposed. The nature of the influence of the height of the stationary layer of Fe (II) sulfate heptahydrate, exhausted wood flour and iron oxide pigment, as well as the temperature of the heat agent and filtration rate on the intensity of filtration drying and the proposed dependences for predicting the drying process of these materials. The basic scheme of the drying installation for dehydration of dispersed materials, a technique of its calculation are developed and the basic technological calculations have been carried out. The patent of Ukraine for the invention has protected the plant.