Issues related to the wall temperature of the heating tubes in delayed coking units
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At present, the delayed coking unit is operating at an overloaded capacity of 115%; the wall temperature of the furnace tubes is extremely high at 695°C, the oxygen content is 1.5%, and the negative pressure is -30 kPa. The temperature at the furnace outlet is controlled at 496°C, with water injection at the three designated points proceeding normally. Question: How can the wall temperature be reduced without lowering the processing capacity or the temperature at the furnace outlet?
The water injection volume can be increased to raise the humidity inside the furnace, thereby enhancing the cooling effect on the tube walls and reducing their temperature. At the same time, optimizing combustion control and improving fuel quality can also be considered to reduce excessive temperatures inside the furnace. Insulation materials can also be inspected and maintained to ensure they are in good condition, thereby reducing heat loss. .
Only the volume can be reduced; otherwise, it will affect the lifespan of the furnace tubes
Thank you for your reply. The circulating water in the circulating water plant is yellow, similar to the water of the Yellow River: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5667515 (Source: Haichuan Chemical Industry Forum)