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Commissioning of the sulfur recovery unit in the Yan’an coal, oil, and gas comprehensive utilization project / Author/Source: Huahua Network – Coal Chemicals / Date: 2018-09-26 / Clicks: 29. At 10 a.m. on September 21, the sulfur recovery unit in the gasification and purification center of the Yan’an coal, oil, and gas resources comprehensive utilization project was put into operation; at 11 a.m., the liquid sulfur produced by the reaction slowly flowed into the sulfur storage tank, marking the successful commissioning of the sulfur recovery unit. It is reported that the sulfur recovery unit utilizes a sulfur recovery and exhaust gas treatment process technology independently developed by Shandong Sanwei Petrochemical Engineering Co., Ltd. This technology comprises four main components: sulfur recovery, exhaust gas treatment, solvent regeneration, and liquid sulfur shaping. It is used to treat acidic gases containing hydrogen sulfide from low-temperature methanol washing units. The unit’s nominal capacity allows for the production of 20,000 tons of solid sulfur per year, and given current market prices, it offers significant economic benefits. On the commissioning day, with the close cooperation of the process engineers for the purification unit and the 3D technicians, the first, second, and third stage condensers successively produced liquid sulfur, which was smoothly transferred into the liquid sulfur tank. Following continuous adjustments by the technical staff, the exhaust gases met the standards on September 24, satisfying environmental regulations, and were released from the top of the chimney. At 2:37 a.m. on September 17, the gasification and purification unit of the Yan’an coal, oil, and gas resources comprehensive utilization project successfully generated qualified coal-based syngas throughout the entire process, which was then sent to the natural gas conversion synthesis unit. At 38 minutes, the coal-based syngas produced by the gasification and purification unit was successfully integrated into the methanol synthesis system of the natural gas conversion and synthesis unit, resulting in a steady increase in methanol production; this marked the completion of the entire process for the methanol plant with an annual production capacity of 1.8 million tons. Thus, the entire process of Yan’an Energy Chemical Company’s “leading” production facility has been established. The Yan’an coal, oil, and gas resources comprehensive utilization project is the largest energy and chemical project invested in by Yanchang Petroleum Group in Yan’an. With a total investment of around 24 billion yuan, the project consists of 10 production units along with the corresponding utility systems and auxiliary facilities. The project is located in the Luo River valley in the southern part of Fuxian County, Shaanxi Province. It uses associated gas from Yanchang Petroleum’s oil fields, refinery light oils, and coal as raw materials to build 10 sets of processing units, including ones for producing 1.8 million tons per year of methanol, 600,000 tons per year of methanol derivatives, 400,000 tons per year of light oil products, 450,000 tons per year of polyethylene, 250,000 tons per year of polypropylene, 200,000 tons per year of butanol, 80,000 tons per year of dipropylheptyl alcohol, and 50,000 tons per year of EPDM rubber, along with supporting auxiliary facilities and off-site infrastructure.