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In the 1970s, Guangdong Provincial Institute of Agricultural Machinery and other scientific research units began to develop small and medium grain dryers suitable for China. After the 1980s, China's rural economic system began to undergo reforms, and most of the dry machines developed were developed in the direction of multi-purpose and miniaturization. During this period, research on dry heat sources closely related to drying machinery has also made progress. Successively, hot gas generators, low calorific value gasifiers, rice husk gas generators, solid fuel gas generators, and tubeless hot blast stoves have been successfully developed. , liquefied gas hot stoves and solar drying devices. Since the 1990s, with the in-depth development of rural reforms, China's rural economy and agricultural productivity have developed rapidly, and there have been new developments in professional and intensive scale management. In particular, the seed and grain production bases of state-owned agricultural land reclamation systems of large-scale grain depots gradually equiped with complete sets of grain drying equipment, and together with warehousing, processing and other facilities, they became the main application representatives of grain drying machinery in China. At the same time, specialized production facilities for drying equipment such as Sichuan Santai Drying Machinery Factory, Liaoning Tieling Precision Machinery Factory, and Heilongjiang Hongxinglong Machinery Plant emerged. China Agricultural Engineering Research and Design Institute and Sichuan Agricultural Machinery Research Institute emerged. China Agricultural University and some agricultural research institutes and colleges in Heilongjiang and Liaoning have studied many achievements. Since 1996, Taiwan's wholly-owned company Shanghai Sanjiu Machinery Co., Ltd. has produced a circulation type low-temperature dryer, and Japan's sole funded agricultural machinery (Wuxi) Co., Ltd. has also sold its seed-specific dryers and general-purpose dryers into the Chinese market and has driven Development of Drying Mechanization Technology in Southern Rice Production Area . Although these dryers have high prices, due to their good performance, reliability, high degree of automation, and thoughtful after-sales service, they are still welcomed by farmers and have a good market prospect. At present, the amount of such dryers in Jiangsu, Zhejiang, and Guangdong has reached about 1,000 units. China's grain drying machinery has been exploring history for nearly 30 years and is now facing a rare opportunity for development. First, leaders at all levels attach great importance. All localities have successively proposed the goal of agricultural modernization and full-scale mechanization of grain production, forming a good external atmosphere. The second is the rapid promotion of the combine harvester, which has the desire and requirements for the use of the dryer. Third, there are many kinds of drying machinery at present, and there are applicable models available for selection and promotion. Fourth, local financial subsidies began to shift to support drying machinery. Fifth, the importance of mechanical drying began to be widely recognized. It should be affirmed that the current promotion of grain drying technology and the development of grain drying machinery have very favorable conditions. However, we should also clearly see the existence of constraints: First, one-time big investment. The second is that the investment recovery period is longer. Third, the difference in grain quality is not obvious. Fourth, the scale of grain planting operations is small, mechanical drying cannot yet form scale operations, and no good economic benefits can be obtained. In the interest-driven market economy, there is a lack of development momentum. Therefore, how to grasp the current favorable timing and create mature conditions for development as soon as possible is a top priority. To vigorously promote the mechanization of grain drying in China, we should publicize its advantages, minimize the impact of constraints, and constantly improve the input mechanism. In this way, mechanization of grain drying can have broader development prospects.
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