Question: What is the principle behind a fluidized bed being able to use bituminous coal as raw material?
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I’m an amateur in this field, and I often come across research materials stating that the biggest advantage of fluidized bed systems is their wide adaptability to different types of coal; it is possible to use inexpensive bituminous coal as raw material for production, thereby reducing costs. But I’ve always known the fact without understanding why – why can a fluidized bed use bituminous coal while a fixed bed cannot? Is it because of the higher furnace temperature and more complete combustion? Thank you all**!
The key factor is the gasification temperature; the temperature in a fluidized bed furnace exceeds 1500°C, and under conditions of high oxygen concentration or pure oxygen, the gasification rate is fast, allowing the coal powder to be rapidly and completely gasified