The oil-driven startup of the first hydrogen compressor unit in the pilot project for the clean, efficient, and selective conversion of chemical coal via pyrolysis in Yulin was successful

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The first hydrogen compression unit in the pyrolysis phase of the Yulin Chemical’s project for clean and efficient conversion of coal on a differentiated basis was successfully started up using oil. Author/Source: Yulin Chemical Company, Shaanxi Coal Group. Date: March 25, 2022. Clicks: 3. Recently, the first hydrogen compression unit in this demonstration project for the clean and efficient conversion of 15 million tons of coal per year was successfully started up using oil, allowing for external circulation flushing of the oil system; this marks the official beginning of the trial operations of the large-scale units and key equipment in this project. To ensure the successful commissioning of the hydrogen compression unit through oil lubrication, the Pulverized Coal Pyrolysis Department formulated and issued the \"Management Measures for Oil Lubrication of Large Units in the Pulverized Coal Pyrolysis Department,\" established a task force dedicated to addressing issues related to oil lubrication, developed detailed plans for the oil lubrication process, held regular meetings to progress work, identified all issues that could affect this process, and for each issue determined corresponding corrective actions, deadlines, and responsible persons, thereby ensuring that the preparations for oil lubrication were carried out in an orderly manner. Through the joint efforts of all team members, the oil transport start-up of the first hydrogen compressor unit was successful, 7 days ahead of the scheduled time. The 15 million tons per year demonstration project for the clean and efficient conversion of coal into various products at Shaanxi Coal Group Yulin Chemical Co., Ltd. – involving the production of olefins, aromatics, and other derivatives – is planned to be built in the Qingshui Coal Chemistry Industrial Park within the Yushen Industrial Park in Yulin, Shaanxi. The project will use coal from Mines No. 1 and 2 in Xiaobaodang and Caojiatan in the Yulin area of northern Shaanxi, as well as pyrolyzed coal coke, as raw materials. Advanced gasification technologies will be employed to produce crude syngas; this crude syngas will then be processed through conversion and purification before being fed into methanol synthesis units, MTO units, and olefin separation units to produce ethylene and propylene. Ethylene can be further processed to yield polyethylene and butene-1/hexene-1, while propylene can be used to produce polypropylene, acrylic acid, and superabsorbent resins. The oxygen required for the gasification unit is supplied by the air separation unit constructed as part of this project. The main process units of this project include: an 1.85 million Nm3/h (CO+H2) coal gasification and syngas purification plant (including shift reaction, low-temperature methanol washing, and refrigeration systems); a 60,000-ton/year sulfur recovery unit; a 5.6 million tons/year methanol synthesis plant (including membrane separation and PsA); a 2 million tons/year MTO and olefin separation unit; a 1 million tons/year polyethylene plant; a 1 million tons/year polypropylene plant; a 50,000-ton/year butene-1/hexene-1 plant; a 90,000-ton/year acrylic acid plant; a 90,000-ton/year superabsorbent resin plant; an 600,000 Nm3/h air separation plant; coal storage and transportation facilities; heat power generation units; and utility systems (including all external piping and utility systems in the plant, flares, circulating water stations, storage and transportation facilities, auxiliary facilities, etc.). The total investment in this project is approximately 50 billion yuan. The annual operating time of the project is 8,000 hours; the amount of raw coal required is about 9 million tons, while the amount of fuel coal needed is about 5 million tons.