Three-dimensional modeling of the separation gradient aerosol technologies.Oil separators of the GTE suction systems with the gas flow rate up to 800 m3/h

Abstract

There have been implemented separation gradient aerosol technologies which take into account all the forces and effects that influence the deposition of finely dispersed particles. Substantiation is provided for the scientific statement of intensification of the gradient processes of the aerosol media transfer in the boundary layers of multipurpose surfaces during cleaning of the dispersed multiphase flows for the development of technical devices enhancing energy saving and ecological purity of power plants. A sectional design scheme and a three-dimensional model of an oil separator in finite elements were developed for calculating the hydrodynamics and separation. The hydrodynamic situation and the trajectory of the particles in the flow section of the oil separator are calculated. According to the calculation of the velocity distribution in the oil separator at G = 100...200 m3/h, the velocity in the coagulation profile does not exceed 10 m/s. On the basis of the results of the static pressure distribution for G = 100, 200 m3/h, it is established that the pressure difference in the separating coagulators reaches 2.5...3.9 kPa, respectively. The calculation results at G = 100...200 m3/h show that the total pulsation effect of precipitation of the highly dispersed particles makes up 25.1%. Using the calculations, a prototype oil separator was created; its experimental studies were performed on the stand in the form of an open-type wind tunnel. The coefficient of the total purification efficiency is determined, which reaches 99.9%. On the basis of the separation gradient aerosol technologies, it is possible to improve cleaners capturing aerosols in various power plant systems. The performed studies allow further developing a line-up of separators for the gas flow rate from 20 to 2000 m3/h.