The description of the process of decomposition of hydrate in a steel dome-separator

• Main Authors: Chiglintseva, A. S., Gimaltdinov, I. K., Nasyrov, A. A., Chiglintsev, I. A.
• Format: Conference Proceeding
• Language: English
• Subjects: Decomposition; Domes (structural forms); Gas temperature; Heat exchange; Polyurethane resins; Separators; Steel structures; Thickness
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0092788

The paper considers a mathematical model of the “dome-separator” installation made of steel and polyurethane materials, of three different thicknesses: 0.5; 1 and 1.5 cm. The unit can be used to production oil and gas (or collect it after accident) at great depths in conditions of hydrate formation. The comparison of the main thermophysical parameters is carried out and the motion of the hydrocarbon interfaces and the decomposition of the hydrate layer inside the installation are described. The data obtained showed that in the case of making a “dome-separator” from polyurethane, heat exchange occurs more slowly, therefore the gas temperature in the installation tends to maintain its value, which in turn affects its pressure. Therefore, in this case, the decomposition of the hydrate in the dome is more intense. It is also possible to note a slight excess of the gas level by the end of the filling process of the installation in comparison with the case of its manufacture from steel. In the case of considering a “dome-separator” made of steel with different wall thicknesses, it can be seen that with an increase in this thickness, there is no significant change in pressure, temperature and intensity of hydrate decomposition.