Control of mass transfer processes in sorption gas emissions cleaning

Equipping absorption devices for cleaning gas emissions with automatic control systems is the most effective and promising way to improve the quality of their operation and increase energy efficiency. However, the systems for automatic control of mass transfer apparatuses, known today, do not have the ability to maintain an extremely unstable hydrodynamic emulsification mode while it has the highest efficiency. The object of industrial gas emission sorption purification control system is a mass transfer apparatus where the gas phase flow being purified contacts with a liquid absorbent. The purpose of the control is to intensify the processes of mass transfer during absorption refining of gas emissions under disturbing influences and program recognition of the desired hydrodynamic modes of the mass transfer apparatus operation according to the actual values measured during the process of technological characteristics. The constructed mathematical model is based on the approximation of the points of adjacent filtration curves on which the range of the hydrodynamic emulsification mode is isolated. An indicator of the desired emulsification mode emergence is the appearance of "bursts" in the value of the turbulence index as the flow rate of the gas phase increases. When using the proposed mathematical model in real ACS, the coefficients determined during experimental studies can be identified automatically and used subsequently in the calculation of control actions. Identification of the mathematical control model on a real mass transfer apparatus is advised to be carried out automatically during auto-calibration of technological parameters.

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