Why do delayed coking heating furnace tubes mostly use horizontal tubes instead of vertical tubes?
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Why do delayed coking heating furnace tubes mostly use horizontal tubes instead of vertical tubes?
It is related to the two-phase flow in the furnace tube and the bottom of the furnace tube is easily damaged due to uneven heating.
The horizontal tube is heated more evenly than the vertical tube, and the average heat intensity is high, that is, the oil residence time is short. The horizontal tube is also conducive to clearing coke in the tube. The above advantages are exactly in line with the process requirements of coking, so horizontal tubes are often used.