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Study of deposition of droplets of liquid injected into pipeline by gas-liquid nozzles

Authors: Sergei A. KULIKOV graduated from Gubkin Russian State University of Oil and Gas in 2007. He is specialist in the field of gas control technology in the company “RMG RUS”. Research interests: liquid spraying by centrifugal and gas-liquid nozzles. He is author of 3 scientific publications. E-mail: kulikov.sergey.a@gmail.com
Irina S. KULIKOVA graduated from Gubkin Russian State University of Oil and Gas in 2009. She is Candidate of Technical Sciences. She is Assistant of the Department of Machines and Equipment for Oil and Gas Industry at Gubkin Russian State University (National Research University) of Oil and Gas. Her scientific interests are liquid and gas spraying, technology and equipment for localization and response of oil spills. She is author of 20 scientific publications. E-mail: IrinaSKulikova@gmail.com
Alexander I. KHODYREV graduated from Gubkin Moscow Institute of Petrochemical and Gas Industry in 1980. He is Doctor of Technical Sciences, Professor of the Department of Machines and Equipment for Oil and Gas Industry at Gubkin Russian State University (National Research University) of Oil and Gas. He is specialist in the field of equipment for liquid injection in the implementation of various technologies. He is author of 100 scientific publications. E-mail: aihod@mail.ru

Abstract: The article deals with the problem of spraying liquid inside a pipeline using gas-liquid nozzles. When operating a gas-liquid nozzle installed in the pipeline, the formed droplets may deposit on the pipe wall at a distance of several meters from the nozzle, this can make the spraying process ineffective. The article presents the results of experimental studies performed on the stand, which allows evaluating the deposition rate of sprayed liquid on the walls of the pipelines with a diameter of 150, 300 and 500 mm and up to 10 meters long with one or two gas-liquid nozzles. It is shown that the deposition of the sprayed liquid occurs very intensively within the first ten meters from the point of installation of the nozzle: in most cases, more than half of the sprayed liquid is deposited. Tests have shown that the intensity of droplet deposition decreases with increasing pipe diameter and with increasing atomization fineness achieved by increasing the pressure drop of the sprayed gas and increasing the ratio of mass flow rates of gas and liquid. The use of a circuit with two identical nozzles, directed perpendicularly to the flow and towards each other, allows reducing the deposition rate of the sprayed liquid compared to one nozzle placed on the axis of the pipeline, with a pipe diameter of 300 and 500 mm

Index UDK: 66.069.83

Keywords: gas pipeline, fluid atomization, gas-liquid nozzle, droplets, deposition

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