工业萘制苯酐装置尾气处理方法研究

Treatment of exhaust from industrial naphthalene to phthalic anhydride equipment

为了能够有效处理苯酐装置尾气并合理选择处理方案,对洗涤吸收、蓄热焚烧和催化焚烧现行3种主要的工业萘制苯酐装置尾气处理方式进行了介绍,结合国内装置在实际生产中的运行情况,对各系统的特点和存在的问题进行深入研究。结果表明,洗涤吸收副产品价值高且同时可满足脱硫要求,但对于萘法苯酐装置来说此系统易发生堵塞;蓄热焚烧占地小、操作简便,但维修率高;催化焚烧系统稳定、工艺优化空间大,但国内在苯酐中几乎没有实际运用。

In order to treat the exhaust from industrial naphthalene to phthalic anhydride efficiently and choose reasonable treatment schemes, three main exhaust treatment systems which were washing absorption, regenerative thermal oxidizer and catalytic incineration were introduced. Combining with the practical operation conditions of these systems in domestic, the characteristics and problems of the systems were analyzed. The results showed that, the by-products of washing absorption had high values and the system met the requirements for desulfuration,but for industrial naphthalene to phthalic anhydride device,the system was prone to clogging. Regenerative thermal oxidizer needed less land and it was easy to operate while its maintenance was higher. The catalytic incineration ran stably and the process optimiza- tion space was large, while there were no domestic actual cases.