What are the effects of injecting combustion oil? ? ?
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Will injecting combustion oil when starting up the catalytic unit cause thermal collapse of the catalyst? Feel free to answer. . .
In 2009, it occurred at a petrochemical company: due to water present in the fuel being burned, the catalyst was damaged during startup, resulting in an increase in fine particles and leakage of fluid from the system! I believe that the thermal degradation of the catalyst caused by burning oil without water should be rare, and it won’t affect system operation!
This post was last edited by lilei8610 on 2012-8-6 at 19:58. I agree with the view expressed in the second comment – water in the fuel oil can cause thermal degradation of the catalyst, and dehydration before use can reduce such degradation. I agree with the view from the 4th floor; the combustion of fuel oil to produce water vapor can also cause thermal degradation of the catalyst.
Injecting combustion oil into the regenerator will definitely cause thermal degradation of the catalyst, as can be seen from the large amount of fine catalyst powder discharged from the three spinners within a week of the catalytic unit coming online, as well as the high dust level at the inlet of the flue gas extractor. The combustion oil nozzle of the regenerator is installed at the lower part of the regenerator; the combustion oil is a polychain hydrocarbon, and when it burns in the presence of oxygen, the reaction between hydrogen and oxygen produces water vapor, which can cause thermal degradation of the catalyst.
This question should be understood in a logical way like this: What are the conditions for thermal runaway? 1. Sufficient temperature. 2. Sufficient expansion. A phenomenon that can be called thermal runaway only occurs when both conditions are met simultaneously; otherwise, it is not a true thermal runaway. Therefore, by thinking along this line, it’s not difficult to find an answer to the question you raised!
This is because there may be water in the fuel used for combustion, and the amount of combustion oil sprayed is too large
There should be measures such as using burning oil to enhance dehydration and maintaining a lower regeneration temperature, which will help reduce thermal collapse
Be sure to cut off the water supply before introducing burning oil; otherwise, the presence of water will definitely affect the catalyst and cause thermal collapse
Thermal collapse is certain to occur; the amount of atomized steam supplied along with the quality of that steam {whether it contains water or not} directly affects the degree of thermal collapse of the catalyst.