Hydraulic resistance of the contact stages of the distillation columns

The article presents a study of vortex contact steps with axial and tangential swirlers of a distillation column used in technological lines of chemical processing of wood biomass. Mathematical processing of experimental data on the hydraulic resistance of the contact steps was carried out, with the obtaining of dependencies for determining the coefficient of hydraulic resistance of the contact steps.

Knowledge of the magnitude of hydraulic losses in the apparatus is also necessary when calculating the technological strapping schemes of the apparatus. Currently, there are numerous data in the domestic and foreign literature on the study of the laws governing changes in the hydraulic resistance of vortex apparatuses from operating and design parameters, with various types of vortices.

The results of experimental studies of the hydraulic resistance of vortex apparatuses with tangential vortices show that the hydraulic patterns in these apparatuses are similar to those in the apparatus with axial vortices.

Rectification is widely used in the following industries: in the technologies of complex wood processing; in the timber chemical industry in the production of consumer products; in the recovery of extraction solutions in the extraction of biologically active substances from plant raw materials; in the technology of chemical processing of wood in the production of ethanol; when processing increasing natural waste by gasification and using synthesis gas to produce a biopolymer at the stage of solvent regeneration (methylene chloride, sodium hypochlorite, hexane, etc.), where highly efficient and productive distillation columns are also in demand. For the most part, multicomponent mixtures are subject to rectification, as a rule, azeotropic, having a similar boiling point, which explains the use of multi-stage distillation columns for their separation. At the same time, various methods of rectification are used, such as azeotropic, extractive, molecular, fractional, partial.

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