تجهیزات صرفه جویی در انرژی برای خشک کردن مواد خرد شده

The convective vacuum drying installation of dish-shaped type based on the technology of convective drying at the stationary lowered pressure is presented in this article. The feature of this drying installation is the existence of the multistage punched plates, the diameter of perforation of which varies depending on device height starting from 15 mm in the top part of the camera down to 2 mm in the lower part. That allows drying up different fractions of the crushed material evenly. During experiments it has been revealed that the greatest efficiency of process is reached with a pressure of 50-60 kPa, the temperature of the drying agent of 84-87 0C and the speed of its movement of 6-7 m/s. Besides, this technology of drying allows for the lower power costs associated with the process due to the reduction of heat losses due to the absence of high temperature regimes and decreased duration of the process.