RESEARCH OF THE KINETICS OF THE DRYING PROCESS OF COMBINED PLANT MATERIALS

The general trend of energy consumption, which leads to an increase in the amount of energy consumed in the world, has shown that its cost is constantly increasing, and the shortage of energy carriers is increasing. So, the problem of creating and large-scale implementation of modern energy-efficient heat-technologies, which ensure the reduction of energy consumption and the maximum preservation of the high quality of the dehydrated product, is relevant today. 
In order to solve the above-mentioned problem, this work has developed an innovative pre-treatment of combined plant materials. A study of pH results for different ratios of red beetroot with rhubarb/tomato is presented. We managed to obtain the most optimal content of components in the red beetroot:rhubarb mixture as 2:1, with a pH value of 3.75, and betanin in the studied material after drying remains at the level of 96.5% for red beetroot:tomato - 3:1, in which pH is 3.9, and betanin is 94.7%. Also, with the preservation of earnings and increasing the functionality of the phytoestrogen properties of plant raw materials, the conditions for the stabilization of plant ingredients have been developed. Mixtures of plant materials with different ratios of initial components of plant origin were created and optimal drying modes were developed. 
The kinetics of the drying process of combined plant materials with their preliminary preparation was experimentally investigated. 
On the basis of the obtained data on the change in the nature of the Rebinder number depending on the humidity, the combined plant material and the temperature of the heat carrier, staged drying regimes were developed. 
The theoretical processing of the obtained experimental data on the red beetroot:tomato mixture was performed according to the method of V.A. Danilov. The generalized drying kinetics curves of the red beetroot:tomato mixture coincide with the fast drying regimes. 
The duration of the drying process of the soybean:spinach mixture on the experimental convective stand was calculated according to the method of V.V. Krasnikov. The generalized curve of the drying kinetics of the soybean:spinach mixture made it possible to apply the relative drying coefficients. And it became possible to calculate the total drying time of the soybean:spinach mixture. The deviation of the calculated value from the experimental duration of drying does not exceed 5%.