نوع مقاله : مقاله پژوهشی
نویسندگان
پژوهشکده چرخه سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران- ایران
چکیده
در این پژوهش، رفتار هیدرودینامیکی ستون پرشده همزن‌دار حاوی بخش‌های هم‌زده و پرشده با پرکن‌های نامنظم مورد بررسی قرار گرفت. ارزیابی عملکرد ستون به منظور استخراج یون‌های توریم از محلول آبی انجام گردید. اثر پارامترهای عملیاتی بر شرایط هیدرودینامیکی ستون مورد تحقیق قرار گرفت. نتایج نشان داد که افزایش پارامترهای عملیاتی شامل سرعت اختلاط، سرعت فاز پراکنده و سرعت فاز پیوسته با افزایش در درصد استخراج توریم همراه است. بیشینه درصد استخراج 97/54% در سرعت اختلاط برابر با 220rpm و سرعت‌های فاز پراکنده و فاز پیوسته برابر با mm/s 0/66 حاصل گردید. افزایش سرعت اختلاط موجب کاهش اندازه قطره و توزیع باریک‌تر از اندازه قطرات می‌گردد. با افزایش سرعت فاز پیوسته در شرایط ثابت برای سایر پارامترها، مقاومت در برابر حرکت قطرات فاز پراکنده ایجاد می‌شود و سرعت لغزشی کاهش می‌یابد.
کلیدواژه‌ها
عنوان مقاله [English]
Investigation of hydrodynamic parameters in a packed-agitated extraction column for the extraction of thorium ions from aqueous solution
نویسندگان [English]
- M. Asadollahzadeh
- R. Torkaman
- M. Torab-Mostaedi
Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 11365-8486, Tehran - Iran
چکیده [English]
This research evaluates the hydrodynamic behavior of a packed-agitated column, which includes agitated and irregularly packed sections, for extracting thorium ions from an aqueous solution. The effects of various operating parameters on the column's hydrodynamic conditions were investigated. Results indicate that increasing operating parameters such as agitation speed, dispersed phase velocity, and continuous phase velocity enhances thorium extraction efficiency. The maximum extraction efficiency achieved was 97.54% at an agitation speed of 220 rpm, with dispersed and continuous phase velocities of 0.66 mm/s. Increasing the agitation speed results in smaller droplet sizes and a narrower droplet size distribution. Additionally, an increase in continuous phase velocity, while keeping other parameters constant, creates resistance to the movement of dispersed phase droplets, leading to a decrease in slip velocity.
کلیدواژه‌ها [English]
- Liquid-liquid extraction
- Packed-agitated column
- Thorium
- Operating parameters
- Hydrodynamic condition
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