利用催化剂低温活性提高大甲醇工艺能效的研究

Study on improving energy efficiency of mega methanol process by using activity of catalysts at low temperature

介绍了某项目甲醇合成装置工艺流程,结合大甲醇工艺特点及甲醇合成催化剂的低温活性,对催化剂低温活性进行了可行性分析。考察了各个影响因素对工艺能效的影响,结果表明:在保证能效利用的前提下,通过实际工业操作及优化,延长了甲醇合成催化剂的使用寿命,汽包操作压力由3.9 MPa降至3.6 MPa,烟气中NO_(x)、SO_(2)、颗粒物均达到排放要求,蒸汽过热炉热效率能满足设计要求,合成气压缩机在高负荷情况下运行正常,机组做功能力仍有富余,较大幅度提高了装置的经济效益。

The process of methanol synthesis unit of a project is introduced.Combined with the characteristics of maga methanol process and the activity of methanol synthesis catalysts at low temperature,the feasibility of activity of catalysts at low temperature is analyzed.The effects of various influencing factors on process energy efficiency are investigated.The results show that on the premise of ensuring the utilization of energy efficiency,the service life of methanol synthesis catalysts is prolonged through actual industrial operation and optimization,the operating pressure of steam drum is reduced from 3.9 MPa to 3.6 MPa,NO_(x),SO_(2) and particulate matter in flue gas can meet the emission requirements,the thermal efficiency of steam superheater can meet the design requirements,and the synthetic gas compressor can also operate normally under high load.The working capacity of the unit is still surplus,which greatly improves the economic benefits of the unit.