烟气氨法脱硫装置影响硫酸铵结晶的因素分析研究OA

The ammonia desulfurization technology for flue gas from coal-fired boilers is mature and widely applied.However,it is prone to the problem of poor crystallization effect of ammonium sulfate in the desulfu-rization tower,which leads to difficulties in the centrifugal separation of ammonium sulfate,causing the ammo-nia desulfurization system to shut down and affecting the normal and stable operation of the entire boiler system.To address this issue,an in-depth analysis was conducted on multiple factors affecting ammonium sulfate crystal-lization,based on the actual production operation of several ammonia-based desulfurization units at a specific plant.The results showed that design factors such as a small desulfurization tower diameter,the small design margin of the circulating pump flow,the low rotational speed of the secondary circulating pump,and the small oxidation air volume,as well as external factors such as the substandard slurry quality,will all affect the crystal-lization of ammonium sulfate.If the operating conditions were not optimized,high flue gas temperature and low concentration of flue gas particulate matter will lead to poor crystallization.This study can provide a basis for controlling ammonium sulfate crystallization during the operation of ammonia desulfurization and propose feasible solutions.