备选辅助燃料蔗糖的超临界水氧化工艺参数研究

Research on Supercritical Water Oxidation Process Parameters of Alternative Auxiliary Fuel Sucrose

针对超临界水氧化装置启动过程耗能较大的问题,可选用辅助燃料进行设备升温。对备选燃料蔗糖进行了试验研究,考察了蔗糖最低反应温度、蔗糖溶液质量分数,控制不同反应温度、反应压力、氧气系数等因素,研究了各参数对蔗糖去除率的影响。试验结果表明:蔗糖最低反应温度为283.5℃、蔗糖质量分数为45%,优化工艺条件为反应温度450~500℃、反应压力22.5 MPa、过氧系数150%,此时蔗糖去除率达99.5%。采用蔗糖作为超临界水氧化的辅助燃料具有点火温度低、氧化效果完全、对后续处理其他有机物无影响的优势。

To address the problem of high energy consumption during the start-up of the supercritical water oxidation plant, an auxiliary fuel was selected to warm up the plant to reach the appropriate temperature. The sucrose as alternative fuel was investigated in a pilot study. The minimum reaction temperature of sucrose and the mass fraction of sucrose solution were investigated, and the effect of each parameter on the removal rate of sucrose was studied by controlling different reaction temperatures, reaction pressures and oxygen coefficients. The experimental results showed that the minimum reaction temperature of sucrose was 283.5 ℃, sucrose mass fraction was 45%, and the optimized process conditions were as follows: temperature 450~500 ℃, reaction pressure 22.5 MPa and oxygen coefficient 150%, at which time the sucrose removal rate reached 99.5%. The use of sucrose as an auxiliary fuel for supercritical water oxidation had the advantage of low ignition temperature and complete oxidation effect without effect on the subsequent treatment of other organics.