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New progress achieved in Yulin Energy’s 400,000-ton ethylene glycol project using Corbin furnaces / Author/Source: Gasification World / Date: 2022-10-29 / Clicks: 16. On October 25, the lifting operations for the 210d and 210m trestles in the coal handling system of the power center for Yulin Energy Group Co., Ltd.’s first-phase 400,000-ton/year ethylene glycol production facility, part of a project to produce 1.2 million tons of ethylene glycol per year from coal, were successfully completed. The successful completion of this lifting operation has laid a solid foundation for the full completion of the main structure of the coal transfer trestle, and it has also created favorable conditions for the subsequent installation of the coal transfer belt equipment. The coal conveying device at the power plant’s fuel handling area has a trestle height of 3.5 meters, a width of 6.4 meters, a length of 17 meters, and a weight of 25 tons. The first pier at 210m is 3.5 meters in height, 6.4 meters in width, 32 meters in length, and weighs 34 tons ； The second trestle at 210m is 3.5 meters in height, 6.4 meters in width, 32 meters in length, weighs 34 tons, and has a lifting height of 21 meters. On October 22, the secondary grouting of the three compressor units at the ethylene glycol facility of Shaanxi Yulin Energy Group Co., Ltd., which is part of the first phase of a project to produce 1.2 million tons per year of ethylene glycol via coal-based processes – with an output of 400,000 tons per year – was successfully completed. This marks the completion of the installation of all the large-scale units at this ethylene glycol facility. The successful completion of this grouting task has laid a solid foundation for the installation of compressor pipelines at this center. Project Overview: The first phase of the project, which involves the production of 400,000 tons per year of ethylene glycol, is part of Shaanxi Yulin Energy Group Co., Ltd.’s initiative to produce ethylene glycol on a scale of 1.2 million tons per year. This project constitutes the beginning of development in the clean fuel production base and high-end chemical materials base located in the Qingshui Industrial Park of the Yushen Industrial Zone; the total planned area for this development is 1,711 mu. The project plans to reach the zero-meter mark for the foundation of the main unit on June 15, 2021 ； All installations were completed on June 15, 2022 ； Qualified products were produced on December 15, 2022; the total project duration was 21.5 months, and the total investment in the project remained within 5.8 billion yuan. The first phase of Yulin Energy’s 400,000 tons per year ethylene glycol production facility uses coal blends as raw material, and Collins powder gasification is employed to produce crude syngas. The crude synthesis gas is divided into two streams after entering the shift reactor. One of these streams undergoes heat recovery, and then is sent to a low-temperature methanol wash to remove sulfur and CO2 impurities. The purified synthesis gas is then subjected to deep cryogenic separation to produce CO, which is used in the ethylene glycol production facility. The hydrogen-rich gas resulting from deep cryogenic separation is sent to a pressure swing adsorption unit for H2 extraction ； Another stream of crude syngas undergoes two stages of isothermal shift reaction, after which it is sent to a low-temperature methanol wash to remove sulfur and CO2 impurities. It then enters the PSA-H2 unit together with the hydrogen-rich gas obtained through cryogenic separation, to produce H2 for use in the ethylene glycol plant. The project construction includes a gasification unit, a purification unit, an H2/CO separation unit, an ethylene glycol unit, etc. The utility systems and supporting auxiliary facilities include: 3×350t/h high-temperature and high-pressure circulating fluidized bed boilers + 2×30MW back-pressure steam turbine generator sets, air separation units, circulating water stations, desalination stations, storage and transportation facilities, sewage treatment plants, etc. The gasification unit employs the Collin powder gasification technology and includes 2 powder gasifiers ； The ethylene glycol plant utilizes the Zhongke Yuandong ethylene glycol technology; it uses CO as a raw material to synthesize dimethyl oxalate (DMO) through an oxidation coupling reaction, and dimethyl oxalate is then hydrogenated to produce ethylene glycol.