Research status and countermeasures of Citri Grandis Exocarpium drying technology and equipment

Citri Grandi Exocarpiums drying is a very important step in production and processing, this paper investigates the development status of Citri Grandis Exocarpium drying, reasonably analyzes the scientific and technical problems in this field, and provides references and countermeasures for the rational development of Citri Grandis Exocarpium industry. According to the characteristics of Citri Grandis Exocarpium, the current status of related technologies and equipments used in this field are scientifically investigated. By combining the traditional drying process of Citri Grandis Exocarpium and existing drying methods for Chinese Medicinal Herb, the effects of different drying equipments are compared and studied on the following considerations: the effective components and quality of Citri Grandis Exocarpium, the adaptability and economy of drying machines. Then, the technical deficiencies of drying methods and equipments are discussed, and the key technologies and development trends are analyzed. In the current drying industry of Citri Grandis Exocarpium, the traditional drying room, sunlight drying and shade drying have the lowest cost, microwave drying and hot air drying have the highest efficiency, and vacuum freeze drying and variable temperature pressure differential puffing drying retain the most active ingredients of Citri Grandis Exocarpium. However, each drying method has its disadvantages through comprehensive analysis of all aspects, therefore it is necessary to explore and master the traditional drying process and characteristic parameter changes of Citri Grandis Exocarpium, and to establish the quality grade standards and the technical drying standards for Citri Grandis Exocarpium, in addition, it is a potentially feasible way to use combined drying technologies for maximizing the advantages of each drying method.