【摘 要】
：
将流化颗粒送入立式提升管 ,该颗粒穿过收缩段进入下游接触段。在提升管的边壁处相对设置一对桁架弦杆 ,在膨胀段被加速的颗粒进入均匀的断面区域 ,与含烃原料接触。立式提升
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将流化颗粒送入立式提升管 ,该颗粒穿过收缩段进入下游接触段。在提升管的边壁处相对设置一对桁架弦杆 ,在膨胀段被加速的颗粒进入均匀的断面区域 ,与含烃原料接触。立式提升管在其上游位置的较低区域 ,形成了催化剂的密相床层 ,该流化气体穿过密相区的速度是 0 .91～1.5ｍ/ｓ,
The fluidized particles are fed to a vertical riser which passes through the constriction into the downstream contact section. A pair of truss chords is arranged opposite the side walls of the riser and the accelerated particles in the expansion section enter a uniform cross-sectional area for contact with the hydrocarbonaceous feedstock. The vertical riser, in the lower region of its upstream position, forms a dense phase bed of catalyst with a velocity of 0.91-1.5 m / s through the dense zone,
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