Modeling of technological unit of methanol formalin production with vortex type absorber integration

Kazan National Research Technological University, 68, st. Karla Marksa, 420015, Kazan, Russia

^* Corresponding author: lejnya@yandex.ru

Abstract

The study shows the problem of gaseous emissions in the production of technical formalin. A digital twin of the technological scheme of technical or methanol formalin production is constructed. Methods and ways to reduce methanol in gaseous emissions are shown. The modernized version of the technological scheme of water-methanol methanal solution absorption with process optimization is presented. A comparative justification of the adequacy of the presented model is carried out by comparing the industrial material balance with the material balance of the numerical model. The error between the industrial and calculated data was not more than 15%, which confirms the adequacy of the constructed model in the Aspen Hysys environment. The results are also shown when changing some technological characteristics of the process, which require additional not small costs. And advantages of application of vortex type absorber as an additional absorption stage are shown. Such implementation will also require additional costs, but the cost of vortex type absorber is one order of magnitude lower than the cost of dynamic equipment. At the same time, the methyl alcohol captured in the vortex absorber can be returned to the initial stage of the technological process, thus reducing the environmental load and increasing resource and energy saving at formalin production facilities.