Use of a Vortex-Type Contact Condenser in Absorption of Methanol and Formaldehyde from a Contact Gas

Abstract

Consideration has been given to the process of absorption of methanol and formaldehyde from a contact gas in the production of technical formalin. Using computer simulation, the authors set up a model of a standard flow diagram of methanol and formaldehyde absorption of a contact gas. For the process of absorption, use was made of NRTL and Lee–Kesler mathematical models which allow for the heat and mass transfer. Empirical coefficients for these models have been determined. The amount of methanol and formaldehyde has been established in absorption gases utilized by burning with a standard flow diagram and on adding a supplementary stage of condensation. A comparison has been made of experimental and calculated data of the process. A heat- and mass transfer apparatus of the vortex type has been proposed, which will make it possible to remove an environmental burden and to improve energy-resource saving. The conditions of operation of the absorber with an increase of 22% in the output have been considered.