Predicting future trends in dryer technology worldwide is difficult and a fool's errand. In fact, through the discussion and analysis of the above-mentioned dryer technological innovation, combined with the needs of social development, it becomes the basis for the prediction of this article. The development trend of general dryer technology will continue to develop in the direction of achieving: effective use of energy, improving product quality and output, reducing environmental impact, safe operation, easy control, and multi-purpose one machine. Specifically, the future development of dryer technology will focus on:

Superheated steam is used as the dryer medium in direct drying machines;

Extensive use of indirect heating (conduction) methods;

Use combined heat transfer methods (a combination of convection, conduction and dielectric or thermal radiation);

In special cases, volumetric heating (microwaves or high-frequency fields) is used;

Use a combination of different types of drying machines or conventional dryer technology;

Adopt intermittent heat transfer method;

Use new or more effective heating methods (such as pulse combustion, induction heating, etc.);

Use new gas-solid contact technology (such as two-dimensional spouted bed, rotating spouted bed, etc.);

Flexible design, multi-purpose drying machine;

Use fuzzy logic, neural networks, expert systems, etc. to realize process control;

Online measurement of moisture content and product quality, etc.

Only a few new dryer processes have been selected for description above, allowing us to recognize the common features of innovative technologies. Although a certain new thinking has some outstanding advantages, it also has technical problems that are difficult to apply industrially. It still needs further research and development, and objective evaluation of them. Cooperation between academia and industry is likely to lead to the introduction of advanced dryers or dehydration technologies in the future. Most innovations appear to be incremental, driven by "market pull", with few revolutionary developments driven by "technology push" - because such innovations are difficult and unpredictable to penetrate the market . Because many traditional dryer technologies have reached or are close to maturity, further research and development in some areas is difficult to generate large benefits. Therefore, it is still necessary to research and develop new technologies, and to deepen our understanding of some existing technologies. Only in this way can we This enables these techniques to simulate scale-up and optimization with confidence, reducing the risks associated with applying new technologies.

Although the role of basic research in improving the basic understanding of dryers and drying machines is not mentioned, it is a key factor in understanding and testing new dryer ideas and dryer designs. If a mathematical model could be built that not only took into account transfer phenomena but could also predict the quality of the product, it would be a useful engineering design tool for the development of new drying machines.