300kt/a环氧丙烷工艺反应器降耗减排分析

Consumption and emission reduction of the reactor of 300kt/a propylene oxide process

针对300kt/a丙烯环氧化生产环氧丙烷工艺中四级串联反应工段,采用Aspen Plus软件对双氧水转化率和环氧丙烷选择性进行灵敏度分析,在反应压力1.8MPa、反应温度55℃、丙烯质量空速0.6h^(-1)、双氧水质量分数20%的优化条件下,双氧水转化率为97.39%,环氧丙烷选择性为96.69%,通过改变反应器之间切换方式,丙烯消耗减少89.84t/a,双氧水减少73.28t/a,折算减少二氧化碳排放量820.20t/a。该研究结果对丙烯环氧化生产环氧丙烷反应工段实际工业操作运行具有一定的指导意义。

For the four-stage series reaction section of the 300kt/a propylene epoxidation to propylene oxide,the sensitivity analysis of the effect of operating conditions on hydrogen peroxide conversion and propylene oxide selectivity was conducted by Aspen Plus software.The hydrogen peroxide conversion rate was 97.39%and propylene oxide selectivity rate was 96.69%under suitable conditions of reaction pressure 1.8MPa,reaction temperature 55℃,propylene mass space velocity 0.6h^(-1),and mass concentration of hydrogen peroxide 20%,and the consumption of propylene and hydrogen peroxide was reduced by 89.84t/a and 73.28 t/a,respectively,which translated to reduction of 820.20t/a in carbon dioxide emissions by altering the switching mode between reactors.The research results have guiding significance for the industrial operation of propylene epoxidation to propylene oxide.