磷酸法替代硫酸法处理含氨废气的可行性研究及建议  

Feasibility study and suggestions on replacing sulphuric acid method with phosphoric acid method for treating ammonia waste gas

作　　者：段付岗 DUAN Fugang(Ningxia Taifeng Bozun New Materials Technology Co.,Ltd.,Ningdong,Ningxia,750411,China)

机构地区：[1]宁夏泰丰铂尊新材料科技有限公司,宁夏宁东750411

出　　处：《硫酸工业》2024年第2期7-10,14,共5页Sulphuric Acid Industry

摘　　要：介绍了硫酸法和磷酸法处理含氨废气的技术原理和工艺流程,其中硫酸法是以硫酸为脱除剂,在饱和器或酸洗塔内洗涤吸收氨后生产硫酸铵;磷酸法是以磷酸为脱除剂,在吸收塔内与氨反应生成磷酸一铵,再继续吸收氨生成磷酸二铵,磷酸二铵在解吸塔内解吸出氨后,又转化为磷酸一铵返回吸收塔循环套用,解吸出的氨经冷凝生产氨水。分析评价了二者的经济性、安全性和环保性,得出磷酸法优于硫酸法的结论;从原料、工艺和设备等三方面的适应性,探讨了用磷酸法替代硫酸法处理含氨废气的可行性,并提出了相应的技改措施及建议。The technical principles and process flows of sulphuric acid and phosphoric acid methods for treating ammonia containing waste gas are introduced.The sulphuric acid method uses sulphuric acid as a removal agent,and produces ammonium sulfate after washing and absorbing ammonia in a saturator or acid washing tower.The phosphoric acid method uses phosphoric acid as a removal agent to react with ammonia in the absorption tower to generate monoammonium phosphate,which is then further absorbed to generate diammonium phosphate.After the ammonium phosphate is desorbed in the desorption tower,it is converted into monoammonium phosphate and returned to the absorption tower for recycling.The desorbed ammonia is condensed to produce ammonia water.The economic,safety,and environmental friendliness of the two methods are analyzed and evaluated,and the results indicate that the phosphoric acid method is superior to the sulphuric acid method.The feasibility of using phosphoric acid method instead of sulphuric acid method to treat ammonia containing waste gas is explored from the adaptability of raw materials,process,and equipment,and corresponding technical improvement measures and suggestions are proposed.

关 键 词：含氨废气处理 硫酸法 磷酸法 对比分析 技改措施 建议 

分 类 号：X784[环境科学与工程—环境工程]