旋转填充床脱除裂解气中酸性气体的冷模实验  

Removal of Acid Gas from Pyrogas in Rotating Packed Bed

作　　者：金沙杨[1] 李振虎[2] 戴伟[2] 郭锴[1] 

机构地区：[1]北京化工大学教育部超重力工程研究中心,北京100029 [2]中国石油化工股份有限公司北京化工研究院,北京100013

出　　处：《石油化工》2006年第5期452-457,共6页Petrochemical Technology

摘　　要：用空气和CO2的混合气体模拟裂解气，在旋转填充床中进行酸性气体吸收实验。考察了吸收液流量、吸收液浓度、空气流是、空气中CO2含量、旋转填充床转速和吸收液温度对气相传质系数（KGa）的影响。实验结果表明，KGa为0．2-3．0s^-1，时，KGa随吸收液流量、吸收液浓度、空气流量、旋转填充床转速和吸收液温度的升高而增大，随空气中CO2含量的增加而减小。用冷模数据推算工业操作条件（约1.5MPa，50℃）下旋转填充床的吸收效果，预计可将裂解气中酸性气体的体积分数由1.00％降至1×10^-6以下。旋转填充床脱除裂解气中酸性气体的效果优于传统的脱除工艺。Cold-flow model experiment was carried out in rotating packed bed（ RPB）to remove acid gas from pyrogas. Mixed gas of air and carbon dioxide was used as simulated pyrogas and sodium hydroxide solution as absorbent. The gas phase mass transfer coefficient（KGa） was function of liquid flow rate, concentration of absorbent, gas flow rate, content of carbon dioxide, rotatingspeed and absorbent temperature. Change of KGa was within the range of 0.2 and 3.0 s^-1. it increased with increasing liquid flow rate, gas flow rate and adsorbent temperature but decreased with increase of carbon dioxide content. It was not considerably affected by rotating speed of packed bed. Cold-flow model experiment showed that content of acid gas in pyrogas could be reduced from 1.00% to 1 × 10^-6 in RPB under industry conditions. The RPB process was more effective in absorption of carbon dioxide than traditional process. It could be applied in gas-liquid separation.

关 键 词：裂解气 吸收 旋转填充床 酸性气体 二氧化碳 冷模实验 超重力技术 

分 类 号：TQ028.23[化学工程]