Bending of the conversion tube
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Our company produces hydrogen using 5,000 cubic meters of natural gas. During a recent shutdown for inspection, it was found that the conversion tubes were slightly bent. Under normal operating conditions, the tension in the spring suspensions is around 40%. Could this be the cause of the problem? What should be the appropriate level of tension in the spring suspensions during operation?
When considering the furnace tube waltz, one needs to take into account whether the furnace temperature is too high or if the fire is burning unevenly High temperatures during heating or cooling, fluctuations in feed pulses, uneven heating of the furnace tubes, and other factors can all lead to high-temperature creep! Check the spring supports below, and note down the scale of the upper spring hanger with a marker! Easy to analyze! Before and after starting work!
Generally, 70% of the weight of the conversion tube is borne by the upper springs, with the remainder supported by the furnace bottom beam. Bending can occur when the furnace tubes are heated unevenly or when their thermal expansion is restricted