Heat consumption and production capacity are important indicators of the grain dryer test, but due to the environmental conditions, root food conditions and.
Due to the variability of drying medium conditions, the test results are often not comparable. Therefore, the performance test data of the dryer must be converted to a recognized standard condition for comparison and calibration. This article is based on the test data of the grain drying machine, referring to the domestic and foreign root food drying machine test standards, the unit heat consumption and production capacity conversion coefficient of the root food drying machine are studied and explored; four conversion methods are summarized and analyzed. The calculation methods and steps of the conversion coefficient of the grain dryer under different environments and grain conditions are described, the advantages and disadvantages of the various methods are explained, and preliminary suggestions for the conversion method are proposed to improve the comparability of the dryer test data and improve the dryer The face test standard provides the basis.
my country is the world's largest grain producer, with an annual grain output of 500 million tons. Every year, as a result of the seasonal rainy weather and insufficient drying equipment, the mold loss of grains is as high as 5%. After more than 30 years of development, my country’s grain drying equipment and technology have reached a certain level and played an important role in agricultural modernization. However, compared with our country's demand for drying equipment, there is still a big gap. Take rice drying as an example. Japan has 1.1 million rice dryers, and the rice drying mechanization level has reached more than 90%, while my country’s mechanically dried rice is less than 1%, and rice drying equipment is less than 10,000. station. There are many reasons for the above-mentioned gap, and the backwardness of the research work on the technical standards of grain drying is also an important reason. At present, my country still adopts the national standards in the 1980s (such as grain dryer test methods, technical conditions for grain drying), some of which are not suitable for the needs of the current dryer development, such as the lack of dryer production in the existing standards The conversion method of capacity and unit heat consumption, and the indicators related to drying quality are not perfect and reasonable. Some indicators do not specify a unified test method, and some indicators are relatively backward, which restricts the development, promotion and application of new equipment and new processes for grain drying. . The international technical standards for grain drying have been revised many times, such as 501520-1:1997; the determination of the drying performance of agricultural grain dryers, such as 15011520-2:2print. In these new drying technology standards, there are conversion methods for the main drying performance parameters, and there are as many as dozens of models and formulas (because it is a relatively complex and difficult problem to solve, there is no such thing as in my country’s grain drying technology standards. Regulations in this regard.
