Reasons for fluctuations in burner pressure difference

This post was last edited by wang06120325 on 2015-7-14 at 19:09. The situation mentioned by the person above has been encountered before as well; at that time, the pressure difference at the burner was around 0.25 to 0.3, but it suddenly dropped below 0.2. The temperature of the gasification furnace indeed increased, while there seemed to be no significant fluctuations in the amount of slurry used. The pressure at the outlet of the slurry pipeline decreased by about two to three kilograms compared to before. The solution adopted at that time was to increase the rotation speed of the slurry pump, and gradually the pressure difference at the burner rose again, allowing the slurry flow to return to its previous levels. The only difference from yours is that this phenomenon lasts for a shorter period of time; at that time, it was assumed that a large piece of debris was stuck in the burner head, causing the flow to be deflected. I don’t know if any measures were taken after the situation mentioned upstairs occurred, or whether things returned to normal on their own. If the duration is too long, it is also possible that a change in the viscosity of the coal slurry is to blame; this change in viscosity is evident in the variations in pressure at the outlet of the small coal slurry pump. Once this situation occurs, it is best to address it promptly; otherwise, the formation of peroxides can easily damage the burner.

If the slurry concentration is too high, its fluidity is poor; reduce the concentration slightly and control the oxygen-to-coal ratio. . . . . . . . . . . . .

As the slurry concentration increases, its viscosity also increases accordingly. The pressure at the outlet of the slurry pump should rise rather than fall. Additionally, as mentioned earlier, the slurry flow rate remains unchanged, while the oxygen supply increases significantly. Given the high likelihood of burner offset, if the pressure drop is caused by a decrease in slurry viscosity, the change in oxygen supply should not be particularly significant.

The burner is worn out; I’m not sure what the pressure difference range for the burner in question is. Control the aerobic coal ratio

This post was last edited by liwei909 on 2015-7-15 14:45. Iron wires may be present in the slurry, and worn check valve seals can also cause this issue. Control the rotational speed and furnace temperature properly, and conduct inspections after shutdown.

The reason for this situation is not simple; it is necessary to carefully evaluate various operational parameters. The possible causes of the problem include the following: first, issues with the quality of the coal slurry, which lead to sticking and blockages during pipeline transport； II. Problems with the slurry pump: sticking or blockage of the outlet and inlet valves, issues with the pressure in the outlet buffer tank, which lead to periodic resonance in the slurry pipeline and significant fluctuations in slurry pressure ； III. The issue of central oxygen: Practice has shown that the check valves for central oxygen need to be replaced regularly. It is possible that the valve heads have been damaged, resulting in fluctuations in flow rates from time to time. Currently, there have been cases where the valve heads of check valves in various central oxygen pipelines were damaged or lost without being detected in time, and accidents have already occurred in some manufacturers