消除冶炼烟气和硫磺制酸的瓶颈——增加产量及减少排放

Debottlenecking metallurgical and sulphur-burning sulphuric acid plants:capacity increase and reduction of emissions

讨论了许多升级换代的理念以达到增加硫酸和蒸汽/发电的总产量,并同时降低工厂对环境的排放量。论述了对所有硫酸厂都普遍适用的方法,包括通过改造或更换工厂设备以减少压降、增加二氧化硫气体浓度、风机升级、解决蒸汽系统瓶颈问题以及减排的策略。针对冶炼烟气制酸厂,特别讨论了改善气体净化、增加风机抽吸压力、控制硫酸厂的空气稀释和对工艺条件变化的处理。针对硫磺制酸厂,特别讨论了硫磺的处理和焚烧。

Many concepts for acid plant upgrade to enhance sulphuric acid production and steam/electricity generation while reducing emission to the environment are discussed. The general principles applied to any sulphuric acid plant are summarized, including the upgrade or replacement of the acid plant equipment to reduce pressure drop, enhancement of sulphur dioxide intensity, fan upgrade, methods for de-bottlenecking the issues of steam generation system, and the strategies for emission reduction. For metallurgic acid plants, special discussions focus on the improvement of gas purification, increase of the suction pressure of the fans, control of the air dilution in acid plant environment, and the treatment of the process condition changes. For sulphuric acid plants, handling of sulphur and sulphur burning are reviewed in particular.