China Drying Network Drying is a unit operation that consumes a considerable amount of energy in the industry. According to records, 14% of industrial energy consumption in developed countries is used for drying. In some industries, drying energy consumption even accounts for 35% of total energy consumption. This number is constantly increasing. At the same time, the use of fossil fuels as a heat source for drying operations produces large amounts of carbon dioxide and other gases. The tail gas of the drying equipment (some of these gases contain some dust) has a bad influence on the atmospheric environment, which is a great challenge for the “environmental protection†that has increasingly attracted worldwide attention.
Almost all industries are inseparable from the drying operation. Although the correct understanding of the working mechanism of the drying and drying equipment is conducive to the successful completion of the drying process, we still need to constantly invest in human and material resources to further study the drying technology. Developed to enable it to efficiently use energy while reducing the adverse impact on the environment while producing high quality products, and to make it easier to implement process operations and controls.
Drying is a very important unit operation in many productions. The quality and dosage form of a product depend to a large extent on the comprehensive application of drying technology and equipment. From an economic point of view, dryers are expensive and the project investment is large. Drying, on the other hand, is a process of high energy consumption. The thermal efficiency fluctuates in the range of 15% to 80%, and the operating cost of the equipment.
There is a very close relationship with the design choice of the dryer, so the decision makers of enterprises have always paid more attention to this. There are many varieties of dried material, and their physical and chemical properties are very different. Even the same variety of different production processes and different product requirements for the same product may lead to differences in drying conditions, so the complexity of the drying process is determined. It can be seen that the drying process is more technical than other unit operations.
After 1964, drying technology has developed rapidly. Throughout the history of the development of drying technology and equipment in China, we have experienced the development stage from simple to complex and from low level to high level in decades. Now there are over 30 types of drying equipment that are commonly used in production, plus combination drying. There are about 50 types of equipment, and the use of dedicated drying equipment makes it more difficult to count. It is not an easy task to select these drying equipments. The prerequisite for selection is to understand the basic working principles, structural features, and applicable materials of these equipments. Range, so as to avoid detours during the selection.
In recent years, due to the development of drying technology, more complicated factors have been brought to the screening equipment. Even the design, manufacture, or use of drying equipment often fails to figure out how to choose the right equipment. Since the marketers of drying equipment are only interested in the types of dryers they market, they are not introduced to other types of products. Therefore, users have to use the relevant modern drying technology reference materials to determine the final choice of equipment. There is no doubt that users need the laboratory provided by the salesman, the scope of the experiment, and the technical and economic data. Therefore, it must be familiar with most drying equipment before it is possible to choose a reasonable equipment. It should be emphasized that, in a particular production operating state, there are likely to be many more suitable dryers, but it must also be known that in a particular working condition, there is no strict rule that stipulates the most accurate optimum drying equipment. Each product has its own unique production method. There are many factors that influence the choice of the best drying unit, such as intermittent or continuous drying, fossil fuel consumption, electricity consumption, local environmental laws or noise pollution restrictions. Product selection is a major factor in dryer selection.
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