Grain drying is an important step in agricultural production. But also the main to agricultural production is an important part of the whole food production mechanization. The mechanized grain drying technology as a primary means mechanically, using appropriate technology and technical measures to control the temperature, humidity and other factors. It was without compromising on the quality of grain. Reducing grain moisture content to meet the national standards for safe storage drying techniques.
China is the world 's largest grain producer and consumer countries. The total grain production is about 500 million. According to statistics, China's grain harvest after threshing、 drying、 storage、 transportation、 processing and consumption during loss of up to about 18%. The result is far exceeding the 5% standard FAO regulations. All of these losses, due to climatic reasons, grain or dried too late to reach the safety of water per year caused by mildew. The result of grain sprouting is losses of up to 5 %. If the annual output of grain is 500 million tons, equivalent to 25 million t of grain. If 500g edible food for per person per day, the available food for 6.8 million people a year. This figure is staggering; Trough reducing grain losses receive the hand to gain the lowest point. The mechanization mechanized grain drying is more important than the field work. Which is grain yield.
An overview of the development
Foreign grain drying machinery research started in the 1940s, 1950s and 1960s. The grain drying automated from 1960s to 1970s. The grain drying had a highly efficient and high-quality from 70 years to 80 years. 90 years after grain drying equipment has reached the serialization and standardization after 90 years. In recent years, computer simulation made in terms of grain drying process considerable progress, and constantly develop traditional software and proprietary software for grain drying machinery design and product quality improvement plays an extremely important role.
China's grain drying machines are development in Japan. The former Soviet Union and other foreign drying machine from the early days of liberation began. Due to the complexity of the mechanical structure of grain drying time, consumption of steel and more, high cost. That is not suitable for economic and institutional conditions in rural areas, only in the state-owned farms., grain storage and collective enterprises. The late 1970s, China market began to develop scientific research units suitable for China's national conditions of grain dryers. Most of the production company apply to farm and rural production teams. Late 1980s, China's rural economic system started reform. Most of market developed multi-purpose drying machinery and miniaturization direction. Since 1990s, with the deepening of rural reform, the level of agricultural productivity and economy have improved rapidly. Large-scale company have specialization. The intensification has also been a new development. Especially large grain, seed， and grain production base of state -owned farms. Gradually Zhengzhou Dingli company sets of equipment from grain drying equipment, the storage, and processing line and others. A major application on behalf of my grain drying machinery. According to the United States, Canada, Japan and Taiwan and other countries and regions, grain drying machinery, a number of universities and scientific research units have also developed a corresponding series of grain drying equipment and services in the domestic food system. Grain drying technology development, and gradually make drying machinery to mature, perfect, but also accelerated the pace of agricultural modernization.
Although the China's market of grain drying machinery have been development for nearly 30 years of continuous exploration history. There have been more than 50 manufacturers. But production is not large, low-tech, no more mature models, fewer product categories, and high energy consumption, low level of automation, the lack of suitable agricultural specialist, small and medium sized multi-functional large grain drying machinery used and villages. The existing national market grain drying machinery have more than 20,000 units. The Annual output of mechanical drying grain only about 1%. while the output of developed country of grain drying machinery is 95% of total production. The result is showing that the development of China's grain drying machinery is far from meeting the development needs in cereal production.
