氨法脱硫在硫磺制酸尾气处理中的应用

Application of exhaust treating by ammonia method desulphurization in process of acid preparing

氨法脱硫是低浓度SO2烟气脱硫方法中较传统的工艺,采用液氨或氨水作为吸收剂,具有脱硫效率高、无环境污染、运行成本低、副产物价值高等特点,可充分利用中国资源丰富的液氨生产市场需求量大的农用硫肥和精细化学品。介绍采用湿式三级氨法脱硫技术处理大型硫磺制酸装置尾气并副产固体亚硫酸铵的基本机理、工艺流程、主要设备和生产应用效果,并指出氨法脱硫在替代传统的钙法脱硫方面具有广阔的应用前景。

As a traditional technology, ammonia method used in low concentration SO2 smoke gas desulphurization with liquid ammonia or ammonia water as absorbent has properities such as high efficiency, non - environmental pollution, low running cost, and high by - product value. Abundant liquid ammonia resource in China could be fully used in desulphuriza- tion process, meanwhile by - product from the process can meet the large market demand for agricultural use sulfur fat and fine chemical. Basic mechanism, technological process, major installation, and production application effect of exhaust trea- ting and by - producing solid ammonium sulphite by wet third - level ammonia method desulphurization technology in newly built large - scale sulfur preparing acid installment were introduced. Broad application prospect of ammonia method desul- phurization on substituting traditional calcium method desulphurization was pointed out.