Oxygen flow fluctuation
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Recently, the oxygen flow rate in one of our gasification furnaces has been fluctuating constantly, with the oxygen-to-coal ratio sometimes exceeding 50. I asked the technician to check whether there was a problem with the oxygen control valve, but nothing was found. There are no fluctuations in the system or oxygen pressure, nor in the slurry flow rate and pressure; the burner pressure difference is also normal. I don’t know what the reason is now; does anyone know it?
The oxygen flow control valve is fine; this simply indicates that the valve is working properly. Is there a large variation in the range of adjustment? Factors such as the fluctuations in the vent valve of the main pipeline for the oxygen supplied from the air separation unit earlier, as well as the accuracy of the oxygen flow rate, can all affect the flow rate on the gasification side.
The poster should check the temperature sensor points for the oxygen pipeline – this is something that’s easily overlooked, but it plays a role in the temperature and pressure compensation calculations, and it can affect the flow rate………… This is just my personal suggestion……
Check the oxygen pipeline temperature and the flow meter for the oxygen pipeline.
Reply to 2# GAI20081015: There’s another issue with the regulator filter ahead; the oxygen-to-coal ratio has risen from 480 to over 2000. Later, the instruments were adjusted, and the fluctuations became less severe, but there were still fluctuations. The total pressure of the oxygen tubes remains very stable