CAJ | 학술논문

对700kt／a冶炼烟气制酸钒催化剂的粉化原因进行了分析，总结出催化剂粉化的直接原因是转化温度低、烟气水含量高。针对制酸系统烟气浓度不稳定、水含量高、二级电除雾器出口烟气温度高、干燥效果不理想等问题采取相应处理措施，并对催化剂进行筛分重装处理，改造后转化工序总压降降至4．2—4．5kPa、总转化率提高至99．31％-99．76％。
대700kt／a야련연기제산범최화제적분화원인진행료분석，총결출최화제분화적직접원인시전화온도저、연기수함량고。침대제산계통연기농도불은정、수함량고、이급전제무기출구연기온도고、간조효과불이상등문제채취상응처리조시，병대최화제진행사분중장처리，개조후전화공서총압강강지4．2—4．5kPa、총전화솔제고지99．31％-99．76％。
The causes of vanadium catalyst chalking in a 700 kt/a sulphuric acid plant based on off-gas were analyzed. It was concluded that two direct causes of catalyst chalking were too low temperature and too high moisture content in converter. Some measures were taken to dealt with the problems such as unstable sulphuric dioxide concentration and high moisture content in the inlet gas, high outlet gas temperature of secondary ESP and inefficient drying. Catalyst was screened and reinstalled. After that, total pressure drop of conversion section was reduced to 4.2- 5.4 kPa and the total conversion raised to 99.31% - 99.76%.