Causes of overflow accidents in desulfurization regeneration towers and solutions; how can operators reduce the incidence of such accidents?
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An overflow accident in the regeneration tower has occurred during our factory’s actual production; I would like to know the causes and solutions! Thank you
Overfilling accidents in regeneration towers occur frequently, severely affecting the quality of the desulfurization solution as well as the working environment
The overflow accident in the desulfurization regeneration tower can be attributed to the following main factors: (1) Fluctuations in compressed air flow rate or pressure: Theoretically, less than 2 m3 of air is required to oxidize 1 kg of hydrogen sulfide; in practice, however, due to the need to float sulfur bubbles, the blower capacity in the regeneration tower is 100 m3/m2•h. If the compressed air pressure or flow rate fluctuates suddenly, especially if it increases abruptly, the amount of sulfur foam increases significantly, which can very easily lead to an overflow accident in the regeneration tower. (2) Fluctuations in the pressure or circulation flow rate of the desulfurization liquid pump: Sudden increases in pressure or flow rate can also cause overflow in the regeneration tower. (3) As the blending coal changed, its sulfur content increased significantly, which led to an increase in hydrogen sulfide levels in the gas. The amount of sulfur foam generated also rose abruptly, and since the level regulator did not adjust in time, a large amount of this sulfur foam could not be discharged into the foam tank. In short, a comprehensive analysis is needed to identify the causes so that appropriate measures can be taken.
Human operation should be able to reduce the occurrence of tower overflow accidents, but it’s not clear exactly how to do that I seek advice from those who are more knowledgeable!
I think there are a few points; please correct me if I’m wrong: 1. Ensure stable regeneration air volume. 2. Ensure stable flow rate of the solution circulation pump. 3. Ensure stable sulfur content in the coal blend. 4. Ensure that there are no misoperations of the control valves for the lean liquid overflow pipe and the sulfur foam overflow pipe after startup. 5. Ensure that the gas pressure behind the machine does not become too high, or experience sudden and severe fluctuations.