Seeking help with burner pressure difference issue
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This post was last edited by lflsedin on 2017-5-31 21:24. Our company uses a four-nozzle gasification furnace produced by East China University of Science and Technology. Recently, while operating the gasification furnace, we found that the pressure differences across the four burners were unstable, and the pressure difference of the furnace itself often showed a negative value. What could be the cause of this, and how can it be adjusted? My preliminary assumption is that the atomization effect of the burner is poor; generally, by reducing the pressure difference at that burner, the oxygen supply to it is lowered quickly, but the effect is still not very noticeable. Even when the total amount of oxygen in the furnace is reduced, it takes several hours before the pressure difference becomes positive again. Could it be that the furnace temperature is too high, preventing the slag from remaining in the slag outlet? Recently, the ash melting point has been around 1160; the slag samples are normal, and there don’t seem to be any signs indicating that the slag isn’t staying in the slag outlet
How long has the burner been in use? Have there been any recent changes in the quality of coal slurry? Are there any other abnormalities in the system besides the furnace?
A little over forty days; the only other abnormality is a low level of carbon monoxide, nothing else
Check the burner pressure difference fluctuations to see if there is any coking or blockage in the burner.
The negative pressure difference of the vaporization furnace you mentioned is the pressure difference at the slag outlet, right? If so, it is necessary to check whether the pressure gauge used to measure the pressure difference is accurate and whether there is any blockage by dust. Even if no slag is present at the slag outlet, there will still be a pressure loss, that is, a pressure difference; moreover, the liquid level in the quenching chamber also creates resistance. If the pressure gauge is clogged with dust and thus not sensitive, changes in the pressure difference at the burner can lead to changes in combustion inside the furnace, which in turn may result in a negative pressure difference at the slag outlet for a short period of time.
This post was last edited by pyp222 on 2017-5-30 09:45. Is there any difference in the amount of slag produced by the slag extractor and that produced by the vacuum belt filter? My intuition is that there’s something wrong with the burner, and this issue might be caused by the quality of the coal slurry
Does a negative burner pressure difference not trigger interlock or shutdown after several hours?
Without this interlock, the negative pressure difference at the burner is intermittent, while the negative pressure difference at the gasifier slag outlet persists for several hours
The slag volume is normal; it seems that the atomization at the burner tip is not good
Stop and take another look; it’s definitely not possible to do that now. It’s likely related to the quality of the burner