水合肼生产工艺优化及节能研究

OPTIMIZATION OF HYDRAZINE HYDRATE PROSS AND ENERGY SAVING RESEARCH

利用化工流程模拟软件Aspen Plus V10对2万t/a水合肼合成工艺进行了模拟,流程选用ELECNRTL热力学模型以及文献中的动力学方程进行模拟计算,并对关键参数进行优化,最终丙酮连氮转化率达到了99.47%,工艺流程年度总操作费用(TAC)为3179.64万元/a。为了进一步降低工艺流程的能耗,对流程提出了变压热集成方案,考察了不同压力组合对TAC的影响,结果表明:当浓缩塔操作压力为130 kPa时,工艺流程TAC最小,热集成后TAC比原流程相比降低了14.84%,具有明显的节能效果。

The chemical process simulation software Aspen Plus V10 was used to simulate the synthesis process of 20 kt/a hydrazine hydrate.ELECNRTL thermodynamic model and kinetic equation in literature were used to simulate the process.The key parameters were optimized,and the conversion of acetone to nitrogen reached 99.47%,and the annual total operating cost(TAC)was 31.7964 million yuan/a.In order to further reduce the energy consumption of the process,a pressure swing thermal integration scheme was proposed,and the effects of different pressure combinations on TAC was studied.It was found that when the operating pressure of the concentration tower was 130 kPa,the TAC of the process was the lowest,and the TAC after thermal integration was 14.84%lower than that of the original process,which had an obvious energy-saving effect.It provides a theoretical basis for the energy-saving transformation of industrial production of hydrazine hydrate.