Combined acoustic-convective drying of plant products

Abstract

The paper presents the design of drying plants that combine convective drying with ultrasonic exposure. To create ultrasonic vibrations, ultrasonic emitters in the form of bending-vibrating discs with a diameter of 205 mm and 104 mm were used. Peas and vegetables were the objects of drying. As a result of the experiments, it was found. Drying with the help of ultrasonic action together with the thermal one proceeds no less than in 45% faster in comparison with the drying without ultrasonic action. During the drying of peas using the acoustic field, the drying time was reduced by 210 minutes (45%). The use of powerful ultrasonic action in a non-contact mode on dried carrot samples made it possible to reduce the drying time by 300 minutes, which is 47%. The acoustic method of drying allowed to reduce the drying time of potatoes by 300 minutes (45%).