In a water-coal slurry gasifier, if the pressure difference at the slag outlet decreases, does the temperature at the syngas outlet also decrease?
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Before I made the adjustments, the pressure difference at the slag outlet was high; as the melting of the slag progressed, this pressure difference decreased, and so did the temperature at the syngas outlet. I had previously thought that the temperature at the syngas outlet would increase as the operating cycle progressed, but in reality it decreased. Why is that?
It is mainly due to the operating temperature of the gasification furnace; the water vapor ratio is greatly affected by this operating temperature. After the slagging process is completed, the operating temperature of the gasification furnace returns to normal, and accordingly the outlet temperature of the carbon scrubber decreases.