Thread Content
Progress in the construction of the pyrolysis phase of the 15 million tons/year demonstration project for clean and efficient conversion of coal by Shaanxi Coal Group Yulin Chemical. Author/Source: Huahua Network – Coal Chemical Industry. Date: 2019-10-16. Clicks: 21. On October 13, Shaanxi Coal Group Yulin Chemical Co., Ltd. held a meeting to review the \"Design specifications for occupational disease prevention facilities\" for the pyrolysis phase of this demonstration project. Experts from the Yulin Health Inspection Institute, company leaders, personnel from relevant departments, and design firms attended the meeting. At the meeting, the expert group listened to an overview of the construction project and a report on the design of occupational disease prevention facilities, learned about the specific design details, and provided additional comments and revision suggestions. The expert group unanimously agreed that the \"Design Special Chapter for Occupational Disease Prevention Facilities\" has sufficient design basis and was prepared in accordance with requirements; the methods for identifying and analyzing occupational disease hazards present in the workplace are correct, the procedures are clear, the occupational health management measures are generally feasible, and the conclusions regarding the expected outcomes are accurate. They approved the passage of this special chapter through the technical review. The site where the pyrolysis phase of the 15 million tons per year demonstration project for the clean and efficient conversion of coal into various products, carried out by Shaanxi Coal Group Yulin Chemical Co., Ltd., is planned to be located in the Qingshui Industrial Park within the Yushen Industrial Zone. The construction scope includes: a 1.2 million tons per year pulverized coal thermal cracking unit, a 500,000 tons per year coal tar hydrogenation complex, a 100,000 tons per year gas desulfurization unit, a 420,000 tons per year process wastewater treatment plant, as well as supporting storage, transportation, and power supply systems. The total investment for the project is 3,203.96 million yuan, and it is currently in the detailed design phase. The leadership of Yulin Chemical Company expressed their gratitude to the expert group for its evaluation, and put forward two suggestions regarding occupational disease prevention measures. First, the design firm should promptly revise the \"Design Specification for Occupational Disease Prevention Facilities\" in accordance with the opinions and suggestions provided by the expert group ； Secondly, the HSSE Management Department should take this as an opportunity to continuously enhance its knowledge of occupational health management and improve its prevention capabilities, thereby laying a solid foundation for the company to raise its overall level of occupational health management and prevent occupational diseases. The pyrolysis startup project primarily utilizes the raw coal from Xiaobaodang Mines No. 1 and No. 2, as well as Caojiatan Mine. This coal is ground into powder and then treated using low-temperature pyrolysis technology. The resulting pyrolytic coke is used in gasification processes for downstream applications, while the coal tar components are processed through a suspended-bed combined hydrogenation process to produce coal tar products. The waste heat generated by the processing equipment is recovered and utilized in the 1.8 million tons per year ethylene glycol production facility. Construction contents: 1.2 million tons per year of coal powder pyrolysis unit, 500,000 tons per year of coal tar hydrogenation complex unit, 100,000 tons per year of gas desulfurization unit, 420,000 tons per year of process wastewater treatment unit, as well as supporting storage, transportation, and power supply systems. The plant’s utility and auxiliary production facilities rely on the 1.8 million tons per year ethylene glycol project. The “Demonstration Project for the Production of Chemical New Materials through the Differential Utilization of Coal” undertaken by Yulin Chemical of Shaanxi Coal Group is currently the largest coal chemical project under construction in the world. This project was planned and developed by Shaanxi Coal Group, taking advantage of the resource advantages in northern Shaanxi, following a completely new industrial organization model. The total area of the project is approximately 13 square kilometers, and it includes 27 process units along with the associated utility systems. These mainly involve the medium- and low-temperature pyrolysis of 15 million tons of coal, the production of 5.6 million tons of methanol, 1.8 million tons of ethylene glycol, 2 million tons of polyester, and 2 million tons of olefins, as well as downstream products derived from these materials. The annual amount of coal processed exceeds 20 million tons, with an estimated total investment of over 120 billion yuan. The project will be constructed in two phases and four stages, with the investment for Phase 1 amounting to approximately 70 billion yuan. The 1.8 million tons per year ethylene glycol project is the first phase of this initiative, and it is also the largest coal-based ethylene glycol production facility under construction worldwide. The estimated investment for this project is 26.5 billion yuan; production of qualified products is scheduled to begin in June 2021, with the entire project expected to be completed and operational by 2025. The 1.8 million tons per year ethylene glycol project utilizes Collin’s patented dry powder gasification technology, as well as Japan’s Takahashi’s patented technology for producing ethylene glycol from syngas. Shaanxi Coal Group Yulin Chemical Co., Ltd. and Nippon Kako Kogyo Co., Ltd. jointly invested in establishing Shaanxi Coal Group Yulin Chemical Yugao Chemical Co., Ltd., to build and operate facilities for the production of oxalate esters as well as for the hydrogenation of oxalate esters to produce ethylene glycol. This is the largest Sino-Japanese joint venture to be established in Shaanxi since 2005. The second phase of the first stage of the demonstration project for the use of coal in various ways to produce new chemical materials consists of an olefin production facility with a capacity of 2 million tons per year, along with related deep-processing units; it is expected to be completed and put into operation by the end of 2023. Phase II focuses on coal pyrolysis and is also divided into 2 stages: the first stage is the pyrolysis startup project, which will be constructed simultaneously with the ethylene glycol project, with completion and operation scheduled for June 2021 ； In the second phase, the scale of pyrolysis will be increased to 15 million tons, and the coal tar industry chain will be expanded to produce downstream products containing aromatic compounds. Construction is scheduled to begin by the end of 2021, with operations set to start by the end of 2025.