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Significant results achieved in the first operation of the steam-fed burner in the Sino-Singapore Chemical Gasification Furnace. Author/Source: Sino-Singapore Chemical. Date: 2022-01-14. Clicks: 14. Since the start of trial operations with feedstock supplied to the plant, maintaining stable production while reducing energy consumption has been a key challenge in optimizing the plant’s performance. As a demonstration plant for coal gasification in China, understanding the relationships between changes in the gasification furnace’s load, the oxygen-to-coal ratio, gas composition, and residual carbon in the filter cake is of great significance for achieving energy savings and reduced consumption. As the load of the gasifier increases and the oxygen-to-coal ratio rises, the outlet temperature of the raw gas shows a clear upward trend; simultaneously, the carbon conversion rate and the output volume of raw gas also increase. However, the concentrations of CO and H2 in the useful gas components decrease. To address this bottleneck issue, the company’s management came up with the idea of testing the use of burner steam; this allows part of the steam to act as a catalyst-free converter, enabling effective regulation of the gas composition, control of the gasification temperature, and an increase in the steam decomposition rate. As a result, the output of raw gas increases while the load on the conversion process is reduced. During the initial phase of steam injection, the lack of appropriate hardware in the gasification furnace prevented the proper supply of steam to the gasification burners. To ensure that measures for steam injection into these burners were effectively implemented and to achieve stable production while reducing consumption, recent efforts by the control center, coupled with full cooperation from the gasification plant, led to repeated tests and adjustments. Eventually, the optimal valve opening settings and pressure difference ranges were determined, allowing the steam injection process into the gasification burners to be carried out successfully. According to the process parameters of the gasifier, as steam is supplied to the burners, the CO2 content in the raw gas decreases significantly, while the content of useful gases increases markedly. The volume fraction of CO+H2 in the adjusted raw gas can reach an average of 91.5%, resulting in a 4% increase in the overall amount of useful gases compared to before. Under the same load, the daily methanol production increases by 1.02%. Meanwhile, while maintaining a stable methane content and ensuring a steady output of raw gas, the consumption of coal used as feedstock for gasification continues to decline, further improving the energy conversion efficiency of this coal and thereby reducing the cost of methanol production significantly.