Analytical study of heat transfer in thermohydrocyclon for commercial dewaxing of oil

Abstract

The article considers modernization of the design of thermohydrocyclone (THC), where cooling, solidification and heating mechanisms are carried out in one continuous process. This reduces the time of the complete cycle of oil removal from paraffin, increases the productivity and efficiency of the plant. The technological scheme of continuous operation THC is presented. The general factors and simplifying allowances for mathematical modeling of phase transition processes (melting and solidification) are considered. Differential equations for heat transfer in the course of paraffin melting and solidification in a conical layer have been solved analytically. Formulas for determining thickness of the conical layer of the new phase, time of formation of a new solid phase, and average density of the heat flow in the conical layer on a THC wall have been derived. The effect of centrifugal inertia forces is taken into account. The formulas for calculating the basic parameters are summarized in the form of power criterion equations linking Fourier criteria (Fo), Kosovich criteria (Ko) and Pomerantsev criteria (Po) under the quasiconductive non-stationary heat exchange in THC.