Multichannel mathematical model of separation of liquid aerosol systems in packed scrubber-coolers

THE RELEVANCE of the study lies in the obtained mathematical model for calculating the efficiency of separation of aerosol systems, which takes into account the uneven profile of the gas velocity in the nozzle gas separator-scrubber.

THE PURPOSE is, based on the developed mathematical model, to create an engineering methodology for calculating the efficiency of nozzle scrubber coolers together with aerosol separation using data on the hydraulic resistance of local zones of the chaotic nozzle layer and an uneven gas velocity profile.

METHODS consist in the application of a differential equation of mass transfer of aerosol particles with a local volumetric source of mass transfer and deposition of particles on the surface of a chaotic nozzle. For this purpose, the theory of the turbulent inertial mechanism of particle deposition at high velocities of aerosol systems is used. The volumetric mass source is related to the coefficient of the turbulent particle migration rate, the concentration difference and the specific surface area of the nozzle. The equation of mass transfer of particles is written in a one-dimensional formulation for a number of parallel conditional channels of the packing layer with different gas velocity. The scientific novelty consists in a mathematical model of aerosol separation, which, with low computational costs, makes it possible to predict the effect of inhomogeneity of nozzle placement and uneven gas velocity profile on the efficiency of the separation process.

RESULTS are the established effect of the uneven gas velocity profile in the packing layer on the particle concentration profile and on the efficiency of aerosol separation, which is very important when designing or upgrading scrubber coolers.

CONCLUSION. As a result of the application of the developed mathematical model and calculation methodology, the influence of different gas velocities in a chaotic packing layer on the separation efficiency of aerosol systems has been revealed. It is shown that the presence of irregularities reduces the separation efficiency by 5-33%, which must be taken into account when designing contact scrubbers with nozzles for gas purification from the dispersed phase at enterprises of the fuel and energy complex.

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