Thread Content
The 400,000-ton per year coal-to-ethylene glycol production project of Yankuang Group’s Inner Mongolia Rongxin Chemical Co., Ltd. was successfully commissioned. Author/Source: ChemChem Network – Coal Chemicals. Date: December 27, 2019. Clicks: 27. At 2:55 a.m. on December 26, the second phase of this project at Yankuang Group’s Ordos Energy and Chemical Rongxin Chemical was successfully commissioned for the production of 400,000 tons of coal-to-ethylene glycol per year; DMO (dimethyl oxalate) was produced at 4:55 a.m. on the same day, laying a solid foundation for the subsequent successful production of high-quality ethylene glycol. It is reported that construction of this project began in November 2017. As Yankuang Group’s first EPC turnkey project, as well as its first coal-to-ethylene glycol project, the successful commissioning of this project marked a new milestone by being the first facility of its kind to operate in the northern regions during winter. It also became the first coal-to-ethylene glycol project to be fully operational in 2019. After nearly 700 days and nights of relentless effort, Rongxin Chemical completed all tasks such as civil construction, equipment installation, and individual unit testing within 23 months. At 15:50 on October 29th, Plant G, a four-nozzle opposed water-coal slurry gasifier capable of processing 4,000 tons of coal per day, was successfully put into operation for the first time. Thereafter, the team leaders of Rongxin Chemical along with technical managers from various workshops stayed at the site round the clock. The staff in the control room operated the systems carefully and precisely, while the on-site inspectors increased the frequency of their inspections to ensure more thorough checks. After another nearly 60 days and nights of hard work, the ethylene glycol production facility in Phase II was finally successfully brought online at 02:55 on December 26th, producing the intermediate product DMO. Yankuang Jirongxin Chemical is located on the edge of the Kubuqi Desert in the northern border region of Inner Mongolia. The second phase of the project, which has an annual production capacity of 400,000 tons of coal-based ethylene glycol and 300,000 tons of polydimethyl ether, began construction in August 2017. The total investment required for this project is 7.68 billion yuan, and it covers an area of approximately 1,268 mu. Using coal as the main raw material, and leveraging the resources and capacity available from the first-phase coal-to-methanol project, this facility employs the four-nozzle gasification technology developed by East China University of Science and Technology. Through processes such as gasification, shift reaction, purification, synthesis, and distillation, it produces chemical products such as ethylene glycol and polydimethyl ether. The main construction components of this project include 3 coal gasification units using 4,000 t/d coal slurry gasifiers (with a coal feeding capacity per unit that is the highest among gasifiers in the world today), purification systems (CO conversion, low-temperature methanol washing, deep cryogenic CO separation, PSA hydrogen production), sulfur recovery facilities, a methanol production plant with an annual capacity of 900,000 tons, an ethylene glycol production plant with an annual capacity of 400,000 tons, a DMMn production plant with an annual capacity of 300,000 tons, 2 air separation units with a capacity of 92,000 Nm3/h each (the largest of their kind currently), 2 high-pressure circulating fluidized bed boilers with a capacity of 380 t/h each, plus 2 steam turbine generators with a capacity of 20 MW each, as well as various auxiliary and supporting process equipment.