Calculation of the Operation Parameters of the Catalytic Converters of the Harmful Gas Impurities

There are theoretically founded principles of catalytic converters designing of harmful gas emissions of various heat devices. Experimental investigations have shown that the smallest aerodynamic losses in the constructions of gas neutralizers are achieved at the using of profiled ceramic blades as working units - carriers of catalysts. To ensure intensive mixing of the flow inside the converter the input edges of the blades grids of the future stages should be located between the output edges of the blades of the grids of the preceding stages

Determining Energy Cost for Milling Solid Matter in a Ball Mill

The article provides findings of analytical research into the process of milling friable matter in a ball mill. We have received an expression to determine energy cost of milling with the account of the method of milling and the characteristics of the material to be ground. In the paper, the analytical results of bulk materials grinding process in a ball mill are presented. The differential equation is obtained whose solution determines the value of the grinding mode coefficient, corresponding to the maximum value of grinding process efficiency. The use of the introduced ball mill modes allows reducing the time spent on grinding by 28.9 % for cement clinker, 18.4 % for black coal, 28.9 % for marble and 19.6 % for rock salt compared to the traditionally recommended ones

The longitudinal flow of oil and petroleum products in the channels and pipes

A model associated fluid flow and heat transfer of longitudinal flows of oil in pipes and channelsis considered. The model is based on the existence of a solid core or two such cores and fluid flow part. The flow is considered for the fluid part of Newtonian fluid, for power-law fluidsand for a Newtonian fluid in a turbulent regime. The amendments related to the nonlongitudinal to the flow equations of fluid dynamics and heat transfer, and their impact on core characteristics arediscussed

Infrared drying in technology of dried fruit from macrocarpous purple cherry plum

The application of infrared drying in the technology of production of dried fruit from macrocarpous purple cherry plum has been described in the paper. The employment of large-fruited purple cherry plum as the main raw material of the Turkestan region in the production of dried fruits has been scientifically substantiated. Analyzes of large-fruited purple cherry plum have proved the need of infrared drying for production of dried fruit. The technology of dried fruits from large-fruited red-violet cherry plum has been developed. Infrared drying was carried out in one stage at a temperature of 40-60°C for 5-6 hours when the moisture content of the dried cherry plum reached 15-16%. Samples of a valuable and healthy dried fruit from a large-fruited purple cherry plum with an improved appearance and a high content of useful macro- and microelements have been obtained. The developed technology will expand the assortment of dried fruit

The Longitudinal Flow of Oil and Petroleum Products in the Channels and Pipes. Part II

A model associated fluid flow and heat transfer of longitudinal flows of oil in pipes and channels is considered. The model is an extended version of the Bingham flow on the case of flow with one or two solid cores. The fluid part is a two-phase medium, wherein the disperse phase may consist of solid particles, droplets and gas bubbles. The sliding on the borders of pipes and channels, thermal conductivity and viscosity of such systems and their impact on the characteristics of the solid core are discussed. The flow with a yield point dependence on the temperature is also considered

Universal multi-functional secondary catalyst carriers for purification of gas emission of thermal power equipments

A method of deposition on the surface of metals or ceramics catalytically active compounds by attaching them to the intermediate glass crystalline coatings. The effect of the presence of 3d-transition elements in the intermediate coating to modify the activity of a palladium containing catalyst was studied. The basic indicators of the efficiency of non-isothermal heterogeneous catalytic conversion process of benzene depending on the types of transition metals which are part of the intermediate coating were studied. Comprehensive analysis of the morphology of a glass-intermediate secondary catalyst carriers and surface coating them with layers of catalytically active compounds was carried out, which allowed to estimate the effect of the characteristic features of the structure of the coating surface on the rate constant of the process of conversion and mass transfer coefficient