INCREASING EFFICIENCY OF THE PROCESSES OF BENZENE REACTIVATION AND WASTE DRAINING FROM THE BOTTOMS FOR ITS UTILIZATION

When rectifying benzene, bottoms residue is formed, which is a composition of non-hydrated aromatic hydrocarbons. Its utilization is possible by using it in the printing industry for the production of solvents, industrial oils, SO2 and sulfuric acid, soot, carbon black. In addition, alkaline waters from benzene rectification are used to remove carbonate deposits from oil wells, as well as additives to road tar, etc. For convenience of storage, transportation and use, it is advisable to obtain alkaline waters in dry form. Due to the fact that alkaline waters are a surfactant, a variant of drying by means of coating the working surface by foam extruders with a volumetric IR energy supply is chosen for it. As a result of the carried out experimental studies, their analysis and mathematical processing, there have been obtained approximating equations of dependence of specific productivity of the process on influencing factors, as well as equations of dependence of the IR drying rate of alkaline waters on their moisture content. On the basis of empirical study of kinetic regularities of radiation drying of alkaline waters, a method is chosen and a rational regime for the process is justified; mathematically adequate dependences of the specific productivity and the rate of moisture removal from the influencing factors are obtained. Compared with spray drying, specific yield of the finished product is 3 times higher with IR drying and amounted to 24 kg/(m3 ∙ h)) with 20% reduction in energy costs. It has been stated that for organizing a rational method of drying alkaline waters from benzene rectification, it is expedient to maintain the following regime parameters of dehydration: С н = 0.5 kg/kg, Ер = 3.23 kW/m 2, d н = 4 mm