(Boiler foundation) What is the difference between the critical fluidization velocity under hot and cold conditions?
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What is the difference between the critical fluidization velocity in hot and cold conditions?
Since the volumetric flow rate is proportional to the absolute temperature, with a constant bed cross-sectional area, the volumetric flow rate required in the hot state is only about 45% of that in the cold state. The critical fluidization velocity in the hot state is more than 1.8 times that in the cold state; in other words, the air volume can be reduced when transitioning from cold-state fluidization to hot-state fluidization.