What are the impacts of the interlocks on Shell’s gasification single burner?
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When a single burner shuts down due to low speed, changes in density, or changes in the oxygen-coal ratio, how can one determine what is causing it? Is it possible that there is coal blockage somewhere, or that the bottom cone of V1205 is blocked and preventing proper operation? Or could it be that the burner shuts down as a result of issues with the coal line temperature after prolonged operation? How should these situations be diagnosed?
Jump at a low speed; check if the density has increased. A low density jump indicates a blockage ahead in the pipeline.
We have experienced situations where both the coal line speed and density dropped simultaneously; for a period of time the frequency of such drops was high. After removing the angle valve, nothing was found. Also, the angle valve is fully open at 100%, but the coal flow doesn’t increase; nothing was found after removing the angle valve.
Often, the obstructing material is not necessarily a solid object; it could be fluffy in texture, or it might just be coal particles. It’s normal not to be able to see anything when it’s disassembled.