In the water-coal slurry gasification process, how is the oxygen-to-coal ratio adjusted?
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The synthesis gas outlet temperature in the gasifier is high; it’s possible to adjust the quench water volume and the oxygen-to-coal ratio. But how exactly should the oxygen-to-coal ratio be adjusted? It’s not by reducing the load – I seek guidance from experts
More or less, just check by referring to various sources to see if too much oxygen has been added; if so, reduce the amount of oxygen
The oxygen-to-coal ratio is used to regulate the temperature of the gasifier. The most direct cause of the high temperature of the gas exiting the quench chamber is the amount of water used; additionally, a lower slurry concentration requires more water as well.
Through comprehensive analysis, first, the ash fusion point T3, calorific value, and ash content of coal are examined to determine the appropriate furnace temperature control level. Next, the concentration of the coal water slurry and the amount of methane required when the components of the syngas meet the optimal process requirements are analyzed. Finally, the slag samples from the gasification furnace, the wall temperature of the gasification furnace, and the syngas temperature are also taken into consideration to determine the suitable oxygen-to-coal ratio.
For water-coal slurry, the adjustment range for Yang Meibi is generally not large; the concentration can be adjusted either lower or higher
The slag shape, the ash fusion point of coal, the syngas outlet temperature, carbon dioxide, and methane can all be used as references