Mathematical Description of the Process of Adsorption of Metal Ions by Modified Zeolites in Adsorbers with a Fixed Adsorbent Layer

The solution of the problem of mathematical description of the processes occurring directly in the adsorber apparatus with a fixed layer of the solid phase and comparisons of the results with known classical representations is presented. The following characteristics were calculated: equivalent particle diameter of the sorbent, permissible fictitious velocity of wastewater, adsorber diameter, hydraulic resistance, Reynolds criterion, Prandtl test, Nusselt mass transfer criterion, external and internal mass transfer coefficients, mass transfer coefficients (including taking into account longitudinal mixing), general number of transfer units. The calculation was made taking into account that in the adsorber under consideration the fixed layers of adsopbent are located on cassettes, the distance between which is 0.01 m, which affects some characteristics of the adsorber apparatus with a fixed layer of a solid phase (modified zeolite).