Approval is pending for the pyrolysis phase of the 15 million tons per year demonstration project for clean and efficient conversion of coal into different products at Yulin Chemical, Shaanxi Coal Group

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The Shaanxi Coal Group Yulin Chemical’s 15 million tons per year demonstration project for the clean and efficient conversion of coal on a differentiated basis – related to the pyrolysis phase of this project – is set to receive approval. Author/Source: Coal Chemistry News Date: 2019-08-05 Clicks: 8 Recently, in accordance with the relevant regulations regarding the environmental impact assessment process for construction projects, after review, the Shaanxi Provincial Department of Ecology and Environment has decided to approve this project and has made the decision public. The proposed location for the project is the Qingshui Industrial Park in the Yushen Industrial Zone. The main engineering components include 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 and transportation systems, power supply systems, and water supply and drainage network systems. The project’s utility and auxiliary production facilities rely on the 1.8 million tons per year ethylene glycol plant. The total investment for the project is 3,203.96 million yuan, of which 147.838 million yuan is allocated to environmental protection measures, accounting for 4.6% of the total investment. This project primarily uses the raw coal from Xiaobaodang Coal Mines No. 1 and No. 2, as well as Caojiatan Coal Mine. After being ground into powder, it is treated using low-temperature pyrolysis technology; the resulting powdered coke is used in gasification processes for downstream applications. 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. The coal powder pyrolysis unit utilizes the low-grade coal powder gas-solid heat carrier dual-circulation rapid pyrolysis technology (SM-SP) independently developed by Shengbang Technology Co., Ltd. This technology utilizes a dual-circulation gas-flow bed reactor for the rapid pyrolysis of pulverized coal, achieving reaction times on the order of seconds. Gas-solid fluidization technology is employed to ensure thorough mixing and contact between the materials. Under high temperatures, the organic volatile components in the pulverized coal undergo cracking and partial condensation, ultimately resulting in the formation of small-molecule compounds and oil products, thereby enabling complete pyrolysis of the pulverized coal. The gas stream is cooled to separate products such as light oil, tar, and gas. The device consists of a coal grinding and drying unit, a pulverized coal feeding unit, a carbonization and carbon burning unit, a distillation unit, and associated utility facilities. Shaanxi Coal Industry Group Yulin Chemical Co., Ltd. was established in December 2017. It is a wholly-owned subsidiary of Shaanxi Coal and Chemical Industry Group Co., Ltd., and is responsible for the planning, construction, operation, and management of various projects under Shaanxi Coal Industry Group, including the demonstration project for the high-efficiency, clean conversion of coal into chemical materials on a scale of 15 million tons per year.