During the “10th Five-Year Plan” period, China established 187 sets of fully-equipped grain drying facilities in the main production areas of high-moisture maize—the three northeastern provinces and the eastern part of Inner Mongolia. The new drying capacity was 5.3 million tons/year, making the state-owned The drying capacity of grain storage has been greatly increased, with a total volume of about 30 million tons/year. At the same time, it also developed a number of technical measures to improve the quality of grain drying and improved the quality of grain.
Due to a variety of unfavorable factors during the process of corn storage, the corn after mechanical drying is more likely to be broken, affecting the quality of corn, resulting in a decrease in the number of corn. Therefore, dryer users gradually began to pay attention to the quality of corn after drying. . The usual practice is to reduce the hot air temperature, slow down the drying rate, reduce the internal stress and crack rate of corn after drying, and reduce the loss of crushing in circulation. In the dryer auxiliary equipment through a large number of production tests, reduce the transmission equipment line speed, change the bucket elevator head, tail structure, reduce the number of transmission, reduce food storage gap and many other technical measures, and received better effect.
It is necessary to pay attention to the fact that there are still some problems in China's grain drying technology. For example, the unbalanced distribution of grain drying facilities, the lack of grain drying facilities in the main rice and rapeseed production areas in the south, and the scientific construction mode of grain drying facilities are not yet clear. The grain drying quality still needs to be further improved. The grain drying and heating technology is developing slowly, the energy utilization efficiency needs to be improved, the dust removal technology suitable for the drying system is lacking, and the dust pollution of the dryer has not yet been controlled. The above problems are plaguing the technical progress of the grain storage and processing industry in China, but also provide research and development space for the drying equipment manufacturing industry.
In recent years, international and domestic researchers have attached great importance to the development of grain drying technology. Dirk Maier, professor at Purdue University, and Bakker-Arkema, professor at Michigan State University, made predictions on the future development of grain drying technology. The main manifestations are: specialization of drying technology, intelligentization of drying control, diversification of dry energy, and cleanliness of dry environments. Four aspects. From the perspective of tracking the international frontier technology of grain drying and combining with China's national conditions to carry out technological innovation, the above “four modernizations” are still the basic principles for grain drying technology research and development in China. In the next 5 to 10 years, China's grain drying technology will achieve rapid development in the following areas: scientific model and applicable technology and equipment for the construction of southern grain drying facilities, “precise” drying technology, drying ventilation technology, energy conservation and biomass energy Use technology, intelligent control technology, drying system dust removal technology.

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