Studies of the features of vacuum drying of organic-mineral fertilizers

Abstract

Abstact The article presents the results of studies of drying of organic-mineral fertilizer. Drying options in various technological regimes are considered. Vacuum methods are used in drying materials because they provide good quality at high speeds. In this study, samples of organic-mineral fertilizers were dried at an absolute pressure of 65-75 Pa at a temperature of 50-70 ° C to assess the drying characteristics. The change in the mass proportion of water can be considered as one of the indicators of the effectiveness of vacuum drying of organic-mineral fertilizer. Optimal drying parameters were established when using a vacuum pump in a laboratory installation. The advantages of vacuum drying are revealed, consisting in reducing the process time by more than 2 times. The proposed model effectively predicts the moisture content in organic-mineral fertilizer during vacuum drying.