研究了RSV流程CO₂冻堵机理和控制手段，RSV流程可以通过控制合理的工艺参数和设置预分离器的方式控制冻堵；分析了RSV流程和脱甲烷塔中CO₂的分布规律，结果表明，控制凝液产品中CO₂含量需要将脱甲烷塔下部的CO₂气化并使得之进入上部；在RSV流程基础上，改进双塔RSVC流程，双塔设置可以实现脱甲烷塔顶气相对吸收塔底部液相中CO₂进行汽提，提高吸收塔中的CO₂浓度，设置预分离器可以在吸收塔气相中CO₂含量升高后控制CO₂冻堵。RSV和RSVC流程对比结果表明，RSVC流程在几乎不影响乙烷收率情况下，使凝液产品中的CO₂含量能降低约2.4%。

The mechanism and control methods of CO₂ freezing blockage in recycle split vapor (RSV) process are studied.As for RSV process,CO₂ freezing blockage can be controlled by controlling reasonable process parameters and setting a pre-separator.Distribution rules of CO₂ in RSV process and demethanizer are analyzed.Results show that CO₂ in the lower part of the demethanizer must be gasified and enter the upper part of that so as to control CO₂ content in the condensate products.Based on the above results and RSV process,RSVC,a modified RSV process with double towers is proposed,in which CO₂ in the liquid phase at the bottom of the absorption tower is stripped to concentrate CO₂.A pre-separator is set to control CO₂ freezing blockage once CO₂ content in the gas phase of the absorption tower rises.Comparison between RSV and RSVC processes show that RSVC process can reduce CO₂ content in the condensate products by 2.4% while it brings about little impact on the yield of ethane.