Recently, our company and Sinopec Zhongyuan Petrochemical Co., Ltd. signed a high-purity nitrogen transformation project contract. This protect is a technical transformation of Zhongyuan Petrochemical's existing KDN-3000 high nitrogen equipment. Our company make use of new technologies, new processes, new cold box to upgrade the aging 3000 high-purity nitrogen equipment to 4000 high-purity nitrogen equipment which improves the extraction rate of nitrogen, reduces the unit energy consumption and completes the connection between old and new equipment and integration optimization.