Method of Calculating the Parameters of the Process of Reducing Pressure in a Vacuum-Evaporator

Abstract

In agriculture, the use of humic preparations can increase the productivity, productivity of animals and poultry. The growth rate of consumption of humic preparations in 2021 … 2025 will be from 1 to 5% per year and the market capacity in Russia will be 1500 tons per reptile. Improvement of equipment for the production of humic preparations is urgent. The physical and mechanical properties of the humic suspension have been determined. In the production of humic preparations, medical centrifuges OS-6MC, a flow-through sedimentation centrifuge and a periodic vacuum evaporator (VVU) were used to increase the concentration of humic suspension. In terms of the energy of germination and germination of spring wheat, a rational method for increasing the concentration of humic suspension by evaporation has been substantiated. We have developed and patented a line with VVU to increase the concentration of humic suspension [21]. At the exhibition Golden Autumn - 2020 (Moscow) “For the production of highly efficient agricultural machinery and the introduction of advanced resource-saving technologies”: Kurgan State Agricultural Academy was awarded a bronze medal and a diploma: “For the development of a line for the production of a humic preparation.” When the time for the VVU to enter the operating mode is the sum of the heating time of the installation to the operating temperature and the time for the pressure drop in the installation from atmospheric to working. A method has been developed for calculating the time the vacuum evaporator reaches the operating mode at start-up. The heating time of the VVU with a tank of 50 liters from the initial installation temperature of 10 ° C to the boiler temperature of 85 ° C, and of the humic suspension to 60 ° C will be 30 minutes at a power source of 12 kW, which is confirmed by experiment. A method for calculating the parameters of the process of lowering the pressure in the VVU has been developed. Dependencies are obtained for studying the relationship between the design and technological parameters of the VVU when the pressure is reduced from atmospheric to working. The time of pressure reduction with a volume of 1 m3 of the vacuum system will be 5 … 6 minutes, which is confirmed by experiment.