On September 13, 2021, General Secretary Xi Jinping visited Yulin City, Shaanxi Province, went to the National Energy Group Yulin Chemical Co., Ltd., walked into the central control room, and came to the project site to learn about the comprehensive utilization of coal. He emphasized that the energy industry must continue to develop, otherwise it will not be enough to support the modernization of the country. Coal energy development needs to be transformed and upgraded, and take the path of green and low-carbon development. This will not exceed the limits of resources, energy, and the environment, but will also help achieve the goal of carbon peaking and carbon neutrality, adapt to the requirements of building a community with a shared future for mankind, and take good care of our home planet.

National Energy Group Yulin Chemical Co., Ltd. was established in March 2012. It is located at the junction of the Mu Us Desert and the Loess Plateau in northern Shaanxi, and belongs to the hinterland of China's energy "Golden Triangle". Since its establishment, Yulin Chemical Company has adhered to the path of green development, rationally laid out the industrial chain, and formed a complete industrial chain of "turning black to white" from coal to methanol to polyolefins and various chemical products.

Shaanxi methanol downstream processing project, the main production equipment includes 600,000 tons/year methanol-to-olefins unit, 600,000 tons/year olefin separation unit, 300,000 tons/year low density polyethylene unit and 300,000 tons/year polypropylene unit. The project uses methanol conversion to olefins and olefin polymerization processes to produce polyethylene, polypropylene and by-products such as ammonium sulfate, propane, mixed carbon four, mixed carbon five and other chemical products. The project was successfully commissioned and commissioned on December 25, 2015, and was awarded the "National Quality Engineering Award".

Yulin Circular Economy Coal Comprehensive Utilization Project (first-stage project), with an annual output of 1.86 million tons of coal to methanol, and an annual conversion of 4.4 million tons of coal. The project adopts the current mature and reliable coal gasification to methanol process technology route, using coal as the raw material, through the process of coal gasification, CO conversion, low-temperature methanol washing, sulfur recovery, methanol synthesis, etc., to realize the transformation from coal to methanol to polyolefin. And a complete industrial chain from black to white for various chemical products, of which methanol is all used as the raw material for downstream processing projects.

Keywords: engineering construction, engineering news

The project completed the entire process at one time on December 28, 2020, and it took 37 hours to produce qualified MTO grade methanol, setting the domestic record for the shortest time from feeding to producing methanol. Yulin Chemical also has a 400,000-ton/year syngas-to-ethylene glycol project under construction. The project adopts independent technology, is designed and constructed by the National Energy Group, and the equipment is fully localized. There is also the world's first 50,000-ton/year polyglycolic acid degradable material demonstration project (referred to as PGA project). This project is one of the top ten scientific and technological projects of the National Energy Group in 2021. It adopts independent intellectual property rights and the products can be completely degraded in natural environments such as soil and seawater.