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Production practice of dilute phosphoric acid absorption method to treatmenting three ethylamine tail gas

ZHANG Bo;Sinopec Nanjing Chemical Research Institute Co.,Ltd.;  
The process principle and technological process of absorbing three ethylamine tail gas by dilute phosphoric acid instead of pure water are introduced.The main factors affecting the absorption of three ethylamine are the p H value and density of circulating absorption fluid. When the p H value is greater than 7 and the density is more than 1. 18,it is necessary to replace the circulating liquid in the circulating liquid tank.After treatment,the mass fraction of three ethylamine is less than 1% after treatment,and it can be recycled after subsequent removal of light and refining.Diluted phosphoric acid spray absorption three ethylamine tail gas device after commissioning,tail gas online VOCs reaches the national environmental protection emission standard.
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