Development of microwave drying technology in China

Microwave drying is different from traditional drying, and its heat conduction direction is the same as the water diffusion direction. Compared with the traditional drying method, it has the advantages of a large drying rate, energy savings, high production efficiency, uniform drying, clean production, easy automatic control, and improved product quality, so it is getting more and more attention in all fields of drying. As early as the 1960s, the application and theory of microwave drying technology were greatly studied abroad, and they have been further developed in recent decades. China's microwave drying technology research started late, compared with a certain gap with foreign countries, but also achieved good results. There are also many research and application results. Microwave drying technology in China has been used in the food industry, material chemical industry, pharmaceutical industry, mineral mining industry, ceramic industry, laboratory analysis, wet natural rubber processing, and other aspects.

The drying process involves almost all sectors of the national economy and is widely used in production and life. The purpose of drying is to remove moisture or solvents from some raw materials, semi-finished products, and finished products to facilitate processing, use, transportation, storage, etc. General drying methods include mechanical, chemical, and heating (freezing) methods. These methods require either large equipment, high drying costs, or slow drying speeds and small handling capacities. With the development of science and technology, such as the emergence of biological products, new materials (multiphase composite materials, nanomaterials, intelligent materials, biomedical materials, etc.), advanced ceramics, new advanced food products, and new pharmaceutical products, traditional drying techniques and dryers are not necessarily suitable. Microwave drying technology and microwave dryers have been widely used in the light industry, chemical material industry, food and agricultural product processing industry, and other industries and have shown remarkable advantages. Microwave drying is undoubtedly a new technology to meet the requirements of new products.

Compared with foreign countries, in our country, the application of microwave drying technology research started late. Although there have been many achievements, the application of microwave drying technology research field is narrow, mostly staying in the experimental stage or small-scale production stage. We need to expand composite microwave drying technology research; microwave drying instant mass transfer theory research is not enough; and microwave drying technology supporting equipment and instrument development still needs to be strengthened. In addition, although the application of microwave drying in natural rubber drying has made great progress, there are still many problems to be solved in terms of its scale, continuity, automation, and the effect of microwave drying on the molecular structure of rubber. The influence of non-rubber components on the process performance of products needs further study. These are the focus of our future research.

The application of industrial microwave drying equipment in ceramic material engineering has attracted more and more attention. In recent years, from the experimental stage to rapid development and application, efforts have been made to promote the industrial manufacturing of ceramic productsl stage to rapid development and application, efforts have been made to promote the industrial manufacturing of ceramic products. In the field of high-tech applications, it also shows the superiority and uniqueness of ceramic materials. At present, there are no perfect statistics in China, and there are about three or four applications in the actual production of industrial equipment using microwave heating ceramics. The production in the domestic ceramic field needs rapid development; if we change the backward traditional drying technology, the corresponding economic and social benefits can be achieved. We are eager to introduce microwave heating technology in the production. To improve efficiency, improve the labor environment, improve product quality, save energy, reduce production pollution, and achieve the national environmental protection requirements. Promote the process and development of ceramic industrial production in China. Microwave treatment objective: ceramic plate in the production process of the four sides need to control the product size accuracy, so in the processing process to prevent damage to the uranium surface and ensure the product quality.

So the ceramic plate adsorbs a lot of water content; there are a lot of microorganisms in the water, and attached to the ceramic plate in the water, microorganisms will quickly reproduce and grow, affecting the surface of the product and the internal quality. Use the microwave to dry ceramic board, improve product quality, reduce damage rate, improve output, reduce cost, reduce energy consumption, reduce labor intensity, and improve the labor production environment. Become more advanced with a high degree of automation of microwave drying ceramic plate special equipment. Meet the requirements of ceramic industry production to promote China's ceramic system.