氧化锌回转窑废气提效改造治理工程实例

Example of Improvement of Zinc Oxide Rotary Kiln Waste Gas

为解决氧化锌回转窑脱硫系统运行不稳定、运行成本高等问题,响应生态环境部门进一步提高SO2、NOx治理的有关要求,郴州某有色冶炼企业将回转窑尾气处理工艺由“钠钙双碱法脱硫”改造为“气动乳化脱硫法”,并改用硫酸亚铁作为脱硝吸收剂进行脱硝。项目实施后,有效解决脱硫塔喷嘴堵塞、运行不稳定的问题,节约运行成本,大幅减少排入环境的氮氧化物、二氧化硫、颗粒物的排放量,环境绩效明显。In order to solve the problems of unstable operation and high operating cost of zinc oxide rotary kiln desulfurization system, and in response to the requirements of ecological and environmental departments to further improve SO2 and NOx control, a certain non-ferrous smelting enterprise in Chenzhou has transformed the tail gas treatment process of rotary kiln from “desulfurization by sodium-calcium double alkali method” to “pneumatic emulsification desulfurization method”, and switched to using ferrous sulfate as the denitration absorbent for denitration. After the implementation of the project, the problems of nozzle blockage and unstable operation of the desulfurization tower are effectively solved, the operation cost is saved, and the emissions of nitrogen oxides, sulfur dioxide and particulate matter discharged into the environment are greatly reduced, with obvious environmental performance.