hydrodynamics

The filtration drying method of the yellow iron oxide pigment has been proposed. The main characteristics of the stationary layer and the experimental results of the hydrodynamics of filtering the heat agent through the stationary layer of pigment of different heights have been presented, which allows us to conclude the application feasibility of the filtration method by taking into account insignificant values of pressure drops.

The experimental results of the hydrodynamics of filtration of the thermal agent in a stationary layer of granular chalk are given. As a result of the conducted experiments, new calculation dependencies were obtained for determining the hydraulic resistance of a layer of granular chalk depending on the filtering speed of the heat agent and the height of the material layer. Calculation dependencies for determining the coefficient of hydraulic friction were also proposed and its dependence on the Reynolds number was established.

The work deals with the results of using the cotton fiber as the purest and most natural cellulose, as well as a raw material for the production of various chemical products. The necessity of cotton fiber preparation for its use in the chemical industry and expediency of its drying via a filtration method has been substantiated. The geometrical parameters of individual cotton villi, physical and mechanical characteristics of the layer were experimentally investigated.

Іn the conditions of rising prices for gas and coal, the use the peat as an energy resource is promising for Ukraine. According to the "Development Concept of the Ukrainian peat industry till 2030", the production of peat for fuel and fertilizers in Ukraine in 2020 is scheduled to amount 4-5 million tons per year. Milling peat may be a valuable local fuel for thermal power plants, municipal utilities, as well as the raw material for the production of fuel briquettes. Production processes of the peat pressing are multi-stage, long-term, resource and energy-consuming.

Actual problems in the study of the drying process is to establish the relationship between moisture content and temperature of the material in the process of dehydration.

This makes the choice of optimal operational parameters and calculation systems not only based on the kinetics of dehydration,

Mathematical calculations for determining the hydrodynamic characteristics of granules movement in the workspace of the vortex granulator, which is the main ultimate process of chemical technology and forms properties of ordinary and porous ammonium nitrate and carbamide, are presented in this paper. Components of a granule velocity and the granulator design impact on them are analytically determined. Comparison of theoretical and experimental studies is performed.

This paper presents the prospective line of studying such chemical process as granulation and the advantages of small universal vortex granulators usage in chemical processes, for example, for the production of nitrogen mineral fertilizers, complex mineral fertilizers and porous ammonium nitrate (PAN). The mathematical calculations for determining the hydrodynamic characteristics of gas flow movement, which ultimately affect the crystallization process in the workspace of the vortex granulator, are described.