سال انتشار: ۱۳۹۰

محل انتشار: هفتمین کنگره ملی مهندسی شیمی

تعداد صفحات: ۷

نویسنده(ها):

Mahbube Faryadi – CFD Research Centre, Department of Chemical Engineering, Razi University,Tagh Bostan, 67149 Kermanshah
Fahime Parvizian – CFD Research Centre, Department of Chemical Engineering, Razi University,Tagh Bostan, 67149 Kermanshah
Masoud Rahimi – CFD Research Centre, Department of Chemical Engineering, Razi University,Tagh Bostan, 67149 Kermanshah

چکیده:

Gas hydrates are representatives of a class of compounds known as clathrates or inclusion compounds. Natural gas and crude oil normally reside in reservoir in contact with water. Water can combine with low-molecular weight natural gases to form a solid, hydrate, even if the temperature is above water freezing point. Hydrates are considered as nuisance because they block transmission lines, cause tubing and casing collapses, and foul process heat exchangers, valvesand expanders. Fundamentally there are different ways to prevent hydrates from forming. In thisstudy application of ultrasonic waves to prevent hydrate formation and instantaneous remove formed hydrate in gas pipelines ultrasonic waves was investigated. Piezoelectric transducers with frequency of 38 kHz and 1.7 MHz have been used. Results show ultrasonic waves with low frequency cause the crystals to disintegrate and melt into the liquid and high frequency changes water into cold vapor directly, which can exit with main gas stream