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The kick-off meeting for the wastewater reuse system of the ethylene glycol project at Shaanxi Yueneng Chemical Materials Co., Ltd. was successfully held. Author/Source: Coal Chemical Engineering 114 Forum. Date: July 11, 2021. Clicks: 85. On July 8, the kick-off meeting for the wastewater reuse system related to the ethylene glycol project at Shaanxi Yueneng Chemical Materials Co., Ltd., part of Shaanxi Yulin Energy Group, was successfully held! Lu Xuehua, Deputy Secretary of the company’s Party branch and General Manager, Li Zhengang and Wang Haishè, Deputy General Managers, relevant leaders from China Tianchen Engineering Design Institute, as well as the company’s technical staff attended the meeting. The project was contracted out in its entirety to Tianchen Engineering Company, with a contract value of 147 million yuan. The wastewater treatment plant is used to treat wastewater from processes such as ethylene glycol production, gasification, shift reaction, low-temperature methanol washing, and coal preparation; it also handles water used for cleaning equipment across the plant, domestic wastewater, initial rainwater, flare condensate, as well as any wastewater that may be generated in the event of an accident ； Reclaimed water reuse systems include wastewater treatment and reuse systems as well as treated wastewater treatment and reuse systems. The wastewater treatment and reuse system is primarily used to treat wastewater that has met the required standards after treatment, while the purified wastewater treatment and reuse system is mainly used to treat wastewater from the circulating water station and the neutralized wastewater from the desalination station ； During this meeting, the two parties discussed and negotiated matters such as the milestone dates for the construction of the wastewater reuse facility for the company’s ethylene glycol project, the project coordination procedures, the allocation of key equipment, and the start date for civil works. Lu Xuehua emphasized that the construction of the wastewater treatment facility started late, and both parties need to strengthen communication and coordination, share information, work together, and pay close attention to construction management ； While ensuring project quality, it is essential to focus on key project milestones to guarantee the smooth progress of the wastewater reuse system construction. The 400,000-ton-per-year ethylene glycol production phase of the first phase of the 1.2 million tons-per-year ethylene glycol production project carried out by Shaanxi Yulin Energy Group Co., Ltd. is part of the initiatives launched by this company 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 these facilities 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 blended with other materials as raw material, and employs Corning powder gasification 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 before being sent to low-temperature methanol washing 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 obtained 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 low-temperature methanol washing 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 Corning 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.