烟气制酸装置净化工序出口氟含量的优化控制

介绍了昆鹏公司硫酸装置净化工序的除氟工艺流程和运行效果.为解决净化工序出口烟气氟含量过高,对后续设备造成腐蚀等问题,技术人员在净化工序二级动力波洗涤器处增加钠水玻璃除氟装置,由原来的一级除氟改为两级除氟.改造后,有效防止了冶炼烟气中氟含量突然大幅升高对净化工序造成的影响,将一级动力波循环液氟质量浓度控制小于8 g/L,二级动力波循环液氟质量浓度控制小于1 g/L,使干燥塔出口氟质量浓度小于1 mg/m3.

Optimized control of fluorine content at outlet of cleaning section in metallurgical acid plant

Defluorination process and operation effect of cleaning section in sulphuric acid plant of Kunpeng Co.,Ltd.are introduced.To solve excessive fluorine content in flue gas at outlet of purification process corroding follow-up equipment,technical staffs added sodium water glass defluorination device at two-stage Dynawave scrubbers in cleaning section,changed primary defluorination into two-stage defluorination.The modified process effectively prevented sudden and sharp increase of fluorine content in off-gas from affecting cleaning process,with fluorine concentration in second-stage Dynawave circulating liquid less than 1 g/L,fluorine concentration in first-stage Dynawave circulating liquid less than 8 g/L,and fluorine concentration at outlet of drying tower less than 1 mg/m3.