The Changqing Ethane-to-Ethylene Project undertaken by the PetroChina Lanzhou Petrochemical Company started production, and produced up-to-standard ethylene products. Located in Yulin City, Shaanxi Province, the project comprises an 800Kt/a ethane-ethylene cracker, a 400Kt/a high-density polyethylene (HDPE) plant and a 400Kt/a full density polyethylene (FDPE) plant as well as other utilities and supporting auxiliaries. The project will play a positive role in driving regional economic growth and accelerating development in northern Shaanxi.
The project highlights green and low-carbon concepts. Novel flue gas denitration technology is adopted, to reduce nitrogen oxides emissions by 70% compared with conventional cracking furnace and achieve ultra-low exhaust gas emissions. Catalytic oxidation is introduced for waste alkali treatment, along with ultrafiltration + reverse osmosis and evaporative crystallization for deep recycling of wastewater, with a reuse rate over 95%. Moreover, by leveraging cutting-edge information technologies such as big data and cloud computing, the project has been built into a "smart factory", which integrates production scheduling, electromechanical instrument management and control, and emergency command. It is listed by the National Development and Reform Commission (NDRC) and the Ministry of Industry and Information Technology (MIIT) as a national demonstration project for producing ethylene via the cracking of ethane.