The relationship between gas holdup and gas velocity in tow risers is similar to that of a single ALR.The flow in one riser is not up to the gas velocigy in the other riser.

• 结果表明：两个上升区气含率与气速的关系同单级环流反应器的规律类似，且一个上升区的流动状况不受另一上升区气速的影响；