Reformed pure oxygen furnace for orchid fields – reduces ash, slag, and residual carbon while increasing the concentration of useful components in the gas

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According to Shanxi Lanhuatianyue, the company plans to modify the pure oxygen gasification furnace that is set to come into operation in 2025. By increasing the effective carbon layer height within the furnace and optimizing the thickness of the gasification layer, it aims to achieve a residual carbon content in the ash at less than 3%, with the effective components of the gas exceeding 80%. The modification was carried out on Furnace No. 2 for pure oxygen. On January 25, 2026, the startup and shutdown procedure for Unit 2 was initiated. The measures taken for the renovation include upgrading and replacing the grates, optimizing the grate height, and increasing the height of the empty space inside the furnace. According to previous reports by Orchid Field Yue, after the company’s gasification upgrade, the total amount of emissions, including dust and other pollutants, decreased by more than 50%, demonstrating significant environmental benefits. The environmental upgrade of the gasification and ammonia synthesis processes at Shanxi Lanhua Tianyue involves the use of 10 φ3200mm atmospheric-pressure pure-oxygen continuous gasification units manufactured by Henan Changyu, in place of traditional fixed-bed batch gasification units; in addition, Hangyang Air Separation equipment is employed, and the existing semi-decarbonization units, electrostatic precipitators, raw material gas compressors, decarburization systems, boilers, etc., are also modified to meet the new requirements. The first phase, which includes 2 sets of systems with 4 pure oxygen gasification furnaces, will come online in February 2025; the second phase, with 4 pure oxygen gasification furnaces, will be put into operation in August. By mid-October, the No. 9 and No. 10 pure oxygen furnaces will be officially commissioned and integrated into the production system, bringing all 10 pure oxygen continuous gasification furnaces of Tianyue Company online.