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Position: Home > Articles > Improving the tail gas washing system from AZF process Phosphate & Compound Fertilizer 2007,22 (6) 41-42

AZF工艺尾气洗涤系统的改造

作  者:
张晓光
单  位:
甘肃金昌化学工业集团公司
关键词:
磷酸二铵;AZF工艺;尾气洗涤工艺改造;氨回收率
摘  要:
由于管式反应器工艺存在氨逸出率高、氨损失大的弊端,提出改造尾气洗涤工艺:将用于生产DAP的浓磷酸全部先在文丘里,第一、第二洗涤塔吸收氨后,将中和度0.5的浓磷酸洗涤液送管式反应器;各洗涤塔的所有喷嘴改造为不同型号的螺旋喷嘴;并注意解决洗涤设备的防腐问题。改造后氨回收率由85%提高到≥95%。
译  名:
Improving the tail gas washing system from AZF process
作  者:
ZHANG Xiao-guang(Gansu Jinchang Chemical Industry Group Co.,Jinchang,Gansu 737000,China)
关键词:
diammonium phosphate(DAP);AZF process;improving tail gas washing;ammonia recovery rate
摘  要:
In view of high ammonia loss,tail gas washing section is improved.Absorbing ammonia in Venturi tube,first and second washing tower,the concentrated phosphoric acid is pumped to pipe reactor at the neutralization degree of 0.5;all spouts in washing towers are replaced by spiral spouts and equipment anticorrosion is finished.After improvement,the ammonia recovery rate is increased to over 95% from the previous 85%.

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