Modeling the process of periodical rectification of light hydrocarbons
The paper deals with the issues of breaking the mixtures of the light hydrocarbons into fractions. The periodical rectification is used as fractionation process. The process flowsheet and its description are presented. Two types of the unit operation are considered: one-time and two-times periodical rectification. Time conditions are determined for each type. As the result of modeling the rectification column operation, volumes and compositions of fractionalization products are obtained. The advantages of two-times periodical rectification are defined. The design of rectification column equipped with automatic transfer switch is proposed.