The causes behind breakage of the catalyst are excessive sodium and vanadium content in the feed oil, excessively high regeneration temperature and excessively high steam velocity in riser pipe.
对催化剂的分析表明，催化剂破碎主要由于原料中钠、钒含量超标、再生温度过高和提升管预提蒸汽线速过高所致。
Induced by the high-speed feed jet flow, the solid particles above the feed nozzle tended to flow down, and a reverse flow zone was formed along the riser wall.
受喷嘴区高速射流的影响，喷嘴上方固体颗粒呈向下流动趋势，形成一个诱导回流区域。
The technology is equipped with a catalyst mixer at the bottom of the riser, which can produce an ideal circular flow of catalyst before the catalyst contacts with the feed oil.
该技术在提升管底部设置催化剂混合器，使催化剂在与原料油接触之前形成理想的环状流。
The technology is equipped with a catalyst mixer at the bottom of the riser, which can produce an ideal circular flow of catalyst before the catalyst contacts with the feed oil.
该技术在提升管底部设置催化剂混合器，使催化剂在与原料油接触之前形成理想的环状流。
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