The resistance of the plates depends on the resistance coefficient of a dry plate, i.e. a plate without a layer of liquid, and the resistance coefficient of a plate with a layer of liquid. Also, for large column apparatus, the column mode coefficient is included in the calculation of the resistance, which implies the heating temperature of the cube part and the amount of phlegm that goes to irrigate the plates.
The operating mode is the interaction of steam and liquid, the operating mode includes such parameters as: steam volume (heating intensity of the cubic part), amount of phlegm (volume of liquid used for irrigation of the plates). The mode also includes the amount of liquid on the plates, it is regulated by the height of the partition on the distillation plate, if the liquid overflows the partition, then choking occurs, which leads to a minimum quality of interaction between steam and liquid, if the height of the liquid layer is small, then the vapors rising from the bottom of the column are practically not enriched with phlegm (nkk).
The valve plates are widely used in the petrochemical and distillation industries, with column diameters ranging from 0.5 to 10 m, with plate spacing from 170 to 1100 mm, with designs ranging from single-stream to six-stream, and with a number of plates ranging from a few to more than 200. The EDV® plate is also used in vacuum and high-pressure systems. The main advantages of these plates are their ability to provide efficient mass transfer over a wide range of working loads, simple design, low metal consumption and low cost.
