The study of dependence of moisture removal on operation modes of the grain-dryer with fluidized bed moving along a circular trajectory

The goal of the research was to find out the de-pendence of moisture removal on the grain-dryer operation modes with fluidized grain bed moving along a circular trajectory. The peculiarities of the fluidized bed and wheat grain drying were ana-lyzed. The experiments were conducted in the la-boratory of the Department of metal technology and machinery repair in Kemerovo state agricultural in-stitute. The speed change of the drying agent was done with the help of the frequency regulator; the change of the square of the feeding hole was done with the help of the slide gate. The grain weight was measured with the electronic balance; the bin emptying time was checked up with the electronic stopwatch. The air flow speed was measured with the help of the digital differential pressure gauge. Spring wheat of the variety “Iren” was used for the experiment. The initial and final grain moisture was measured with the laboratory moisture gauge FAUNA ML. The experiment was conducted in the following succession: the frequency converter started the blower and set the speed of the drying agent equal to V = 1,9; 2,2; 2,5; 2,8; 3,1 m/s. The laboratory gauge was heated to the temperature of the drying agent 50 С, then the grain which was weighed beforehand was put into the bin, after that the clearance was equal to S = 10, 15, 20, 25, 30 mm was set with the help of the slide gate. The analysis of the experimental data showed that the more the initial grain moisture was, the more the moisture removal in one pass was. Under the initial grain moisture increase by 1 % the moisture re-moval increases by 0.15 % with the rest conditions being equal. The drying agent speed doesn't affect the moisture removal in one pass. Under increasing the clearance between the slide gates and operat-ing surface by 1 % the moisture removal decreases by 0.77 %. Thus, the optimum is the minimum val-ue S is equal to 10 mm. Under the given clearance the optimum speed of the drying agent is equal to 1.9 m/s.