Secadores Rotatórios

Abstract

Drying is considered one of the oldest unit operations in the Chemical Engineering field. Widely used in a variety of processes, including chemical, food, mining, paper and pulp industries, textile industries, among others. Drying improves product preservation, reduces product weight and volume, facilitates storage, reduces packing and shipping costs, facilitates handling of solids, increases product shelf life by inhibiting microbiological reactions and retarding enzymatic reactions. improve the quality of the final product. Among the various types of dryers currently available, the rotary dryer is one of the most widely used for the continuous drying of solids. Its importance lies in the fact that it is a low cost equipment for deployment and maintenance, versatile and also because of its ease of operation. Therefore, the objective of this work is to make a comprehensive bibliographic review of rotary dryers of the adiabatic type of direct contact, seeking to highlight the following points: fundamental aspects of drying, types of rotary dryers, principles of operation, types and design flight models, residence time distribution models, energy and cost analysis, global design for a rotary dryer design and case studies.