Solving the overheating issue when driving to pick up gas
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Why does the converter experience overheating that cannot be reduced during the startup and gas introduction process after the sulfidation heating is complete? What measures should be taken finally to normalize things?
Has the crude water gas produced by gasification been analyzed? Is there oxygen in it? By what method does it fail to drop as you mentioned? Is it through cooling with N2, or by reducing the amount of process gas or increasing the space velocity?
Overheating due to insufficient airflow means that there isn’t enough air to carry away the heat. I’m not aware of your specific process; for some types of transformations, increasing the airflow is used to reduce the temperature. If a complete transformation is carried out, it is generally the water vapor ratio that is adjusted
When starting the gas introduction, can nitrogen be added to facilitate the process slowly? This way, the probability of overheating is greatly reduced
Could it be that the oxygen level is too high? This is also related to the air velocity
During gas introduction, high water vapor ratio and high air velocity are controlled; high-pressure nitrogen can also be added
If the catalyst is not sufficiently sulfided or reduced, before introducing gas into the converter, raw material gas and nitrogen should be fed in to gradually increase the pressure; the furnace should then be left to stand for a while. During the gas introduction process, it is essential to maintain a high gas flow rate and a high water vapor ratio.
During gas admission, due to the low space velocity, the reaction depth increases, and the heat generated by the reaction cannot be removed in time, resulting in overheating of the bed. :)
As the gas guiding process proceeds, the nitrogen can be removed; if the temperature rises too much, then let the nitrogen act as a \"firefighter\" inside the converter: lol