The calculated dependence of the critical solvent flow rate at which the removal of insoluble particles of ARPD is realized

An analysis of the nature of the formation of asphalt-resin-paraffin deposits (ARPD) has shown that a complex of physico-chemical phenomena on the internal surfaces of equipment for oil production and transportation of petroleum raw materials causes the formation and accumulation of organic solids. In modern conditions, chemical washing operations are widely used methods for preventing and eliminating bottom sediments in oil pipelines. Solvents of a hydrocarbon nature do not allow to remove the problem of removing insoluble deposits of inorganic origin, which can be made possible only by hydrodynamic action due to the intensity of the solvent flow, the degree of which is provided during pumping by means of pumping units of back-up and trunk equipment. The article discusses methods for the rapid determination of the critical intensity of solvent movement when insoluble sediment particles are removed. In this variant, the operating parameters are limited only by the operating pressure in the oil pipelines, and the determination of rational parameters can be carried out by solving the problem of maintaining critical traffic intensity with the lowest energy consumption, which is reasonable to estimate a priori. An estimated calculation of the minimum circulation rate of my medium for the removal of particles of a given size in a pipeline of a certain diameter has been carried out. The validity of the obtained model is confirmed, provided that the particle size does not exceed the thickness of the boundary layer. It is concluded that the proposed method of operational calculation of the critical flow rate will optimize flushing modes, limiting the operating pressure in pipelines and minimizing energy consumption while ensuring the necessary efficiency of ARPD removal. The inapplicability of the graphical method is noted for cases when the particle size significantly exceeds the boundary layer thickness, due to the dispersion of ARPD in a turbulent flow.