Effective gas components of the water-coal slurry furnace at Tsinghua University
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As the title suggests, what are the components of the effective gas in Tsinghua’s water-coal slurry furnace?
In the useful gas mixture: CO: 43.41%, H2: 34.9%; the proportion of useful gas is 78.31%. Different coal types yield different gas compositions, and the content of useful gases also varies. The data above is provided for the original poster’s reference only
Composition of crude gas (on a dry basis) as stated in the introduction materials for Tsinghua furnaces: CO: ~45%； H2: ~35% ； CO2: ~19% ； CH4: ~0.1%
Under normal coal slurry concentrations, these values are essentially the same as those of single-nozzle gasifiers such as those using GE or multi-component slurries.
This is also affected by the ash content of coal and the operating temperature, right?
The Tsinghua furnace uses a water wall structure, which results in a significant reduction of the effective gas composition; it remains around 77%~78%, so it’s not very high. Both the oxygen consumption and coal consumption are high, as the main purpose of this furnace is to produce steam as a by-product.
The auxiliary steam generated by the water wall generally does not exceed 2 tons, so it has little impact on the effective gas content. Fengxi has furnaces equipped with refractory bricks and water walls; the coal used in these furnaces is the same, and experts are welcome to take a look.