Drying equipment selection technology overview Like other industrial technologies, drying technology has also made great progress in the application process. At present, there are more than 400 types of dryers developed, and about 200 kinds of dryers have been used in industrial production. Many new dryers have appeared, some of which are structural improvements to ordinary dryers. The reference has absorbed the advantages of other dryers, and some are completely new ideas. Drying is also a unit operation with considerable industrial energy consumption. According to data records, 14% of industrial energy consumption in developed countries is used for drying, and some industries even consume 35% of the total energy consumption in production Is constantly increasing. At the same time, the use of fossil fuel as a heat source for drying operations produces large amounts of carbon dioxide and other gases. The exhaust gas of the drying equipment (some dust in these gases) has an adverse effect on the atmospheric environment, which is a great challenge to the "environmental protection" that has increasingly attracted global attention. Almost all industries are inseparable from the drying operation. Although a correct understanding of the working mechanism of the drying and drying equipment helps to successfully complete the drying process, we still need to continuously invest manpower and material resources to further research and drying technology Development to enable it to efficiently use energy while producing high-quality products, reduce adverse impacts on the environment, and make it easier to implement process operations and controls. Drying technology features Drying technology has a wide range of applications. Faced with many industries, materials with different physical and chemical properties, product quality and other diverse requirements, drying technology is a cross-industry, interdisciplinary, and experimental Scientific technology. Generally, three aspects of knowledge and technology are required in the development and application of drying technology. The first is to understand the physical and chemical properties of the material to be dried and the use characteristics of the product; the second is to be familiar with the principles of transfer engineering, that is, the principles of energy transfer such as mass transfer, heat transfer, fluid mechanics and aerodynamics; The means of implementation, that is, the engineering design of the drying process, main equipment, electrical instrument control, etc. Obviously, these three aspects of knowledge and technology do not belong to a subject area. In practice, these three aspects of knowledge and technology are indispensable. Therefore, drying technology is a cross-industry and interdisciplinary technology. Although modern drying technology has a history of more than 100 years, it still belongs to the category of experimental science. Most drying technologies currently lack scientific theories and design methods that can accurately guide practice
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