The DeNOx units of Rizhao plant of ShanSteel was commissioned on May 28th, 2020. The coke oven was designed by Paul Wurth and deNOx in coke oven was applied. However it failed to meet the super low emission standard of China, and the deNOx in oven was dismantled. The deNOx outside coke oven was developed by ACRE individually and has applied in many coking plants in China. The result of ACRE’s deNOx in Rizhao plant meets the strict standard (NOx<100mg/m3、SO2 <30mg/m3). The successful commission proves ACRE has the world leading environment protection technologies.