Distribution of the relative frequency of immersion of pea grains in the liquid depending from the height of transportation

Abstract

Abstract One of the main ways to protect seed material from various diseases is treatment with chemicals. The most effective way to protect seeds from various diseases is wet etching with the simultaneous release of grain impurities. To develop a device for cleaning and etching seeds by wet density, studies were conducted to determine the minimum height of the loading hopper relative to the surface of the water solution of the etcher when transporting spherical grains to it in order to ensure that the surface tension forces are overcome. Practical experiments were conducted on throwing single grains of peas of the Vita variety (spherical grain) with a humidity of 14% into a liquid with a density of ρzh = 1000, 1090 and 1150 kg/m3. Sodium chloride salt (NaCl) was used to change the density liquid. To obtain more reliable information, the experiments were carried out in three-fold repetition. The temperature of the surrounding air and liquid of different densities ρzh was 20°C. It is established that when single pea grains fall 100%, the immersion in water (ρzh = 1000 kg/m3) occurs at a transport height h of at least 12.0·10−3 m. In the case of 100% immersion of pea grains in an aqueous solution of sodium chloride (NaCl) with a density of ρzh = 1090 and 1150 kg/m3, the minimum transport height h is 15.0·10−3 and 18.0·10−3 m, respectively.