What are the reasons for the frequent fluctuations in the composition of the raw gas from GE gasifiers?
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The furnace temperature and methane value remain stable, while the burner pressure difference and slag outlet pressure difference experience slight fluctuations. Without any apparent cause, CO levels fluctuate between 32% and 40%, CO2 levels between 19% and 26%, and H2 levels also change. What is the reason for this? There was a period during which the burner pressure difference fluctuated greatly, but the composition of the raw gas remained stable.
1. Specify the actual values of changes in CO, H2, process gas flow rate, furnace temperature, etc
What type of furnace? Is the analyzer online?
If the subsequent system operates normally, then it is a problem with the high-pressure coal slurry pump and the burner； If the burner has not been in operation for long, it is a problem with the high-pressure slurry pump; the valve may be stuck.
The furnace temperature and methane value remain stable, while the burner pressure difference and slag outlet pressure difference experience slight fluctuations. Without any apparent cause, CO levels fluctuate between 32% and 40%, CO2 levels between 19% and 26%, and H2 levels also change. What is the reason for this? ...It might be a change in coal quality.
It’s also possible that online analysis is the cause; you can contact the instrument control personnel to recalibrate the online analysis.
Perform manual analysis with added samples; if there are significant fluctuations, first check whether the operating conditions have changed, and then examine whether there are variations in the raw materials
By analyzing these issues separately from the aspects of raw materials (coal/oxygen), processes (T/P/F/L), equipment (burners/coal slurry pumps), and instruments (online analyzers), you will find the answers. The issues related to gasification mainly fall into these categories
First, consider the aspects of process operation; secondly, inaccurate online analyzers, changes in coal quality, fluctuations in burner atomization...
The slurry concentration fluctuates, or the quality of coal changes – what is your methane content in PPM?
Changes in slurry concentration lead to fluctuations in fixed carbon content