Защита катализаторов гидроочистки нефтяных фракций от механических примесей: экспериментальные исследования и расчет

Проведено исследование эффективности улавливания микрочастиц механических примесей, содержащихся в дизельном топливе, для пакетной загрузки катализаторов – аналога промышленного пакета защитных слоев гидропроцессов. Пакет катализаторов состоял из ранжированных по форме и размеру зерен катализатора: сегментные кольца, полые цилиндры двух типоразмеров и зерна с сечением в форме трилистника. Эксперименты проводились в режиме струйного течения с неизменным ансамблем микрочастиц – железной окалины размером от 5 до 150 мкм на входе пакетной загрузки. Получено, что коэффициент проскока пакетной загрузки катализаторов защитного слоя существенно не менялся (K ≈ 0,985) в ходе эксперимента. При этом наблюдался линейный рост перепада давления на пакетной загрузке катализаторов защитного слоя высотой 17 см – с 220 до 408 Па, который происходил в результате улавливания зернами катализатора микрочастиц механических примесей. Теоретическая оценка начального перепада давления (228 Па) с хорошей точностью совпадает с экспериментальными данными (220 Па).

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