Investigation of the grain cooling plant operation modes

The purpose of research is to study the influence of the design and regime parameters of the experimental setup on the energy intensity and duration of grain cooling. Tasks: determination of the energy intensity and duration of the cooling process depending on the shaft speed, the angle of inclination and the pitch of the blades of the installation for cooling the grain. Experimental studies were performed at the Engineering Center of the Federal State Budgetary Educational Institution of Higher Education “Krasnoyarsk State Agrarian University”, the wheat variety Novosibirskaya-31 was taken as the object, as the most common in the eastern zone of the Krasnoyarsk Region. The studies were carried out in two stages: at the first stage, studies were conducted to study the processes of moisture transfer when moistening the grain; on the second - when cooling. Grain moisture at a relative air humidity of 43 % was 9.9 %. The optimal grain moisture content during extrusion should be 17-18 %. Therefore, to achieve the goal of the study, at the first stage, the change in the moisture content of wheat grain (W, %) was determined depending on the time of its moistening (τ, min). The numerical values of the optimal design and technological parameters of the cooling unit operation are determined: the revolutions of the cooling unit shaft φ = 10 min-1, the angle of inclination of the blade relative to the cooling unit shaft α = 60°, the pitch of the blades on the cooling unit shaft L = 200 mm, at which the cooling time will be t = 1.5 hours, energy intensity of the process E = 9.1 kWh/t.