Discussion on the issues of hot-wall gas flow bed gasification
Thread Content
As the title suggests, regarding the coal quality of certain coal mines in Xinjiang (where the coal quality varies significantly, with a ash fusion point ranging from 1200 to 1400 degrees), the process suppliers suggest, as a precaution, replacing the traditional water-cooled walls used in dry coal powder gasification with refractory brick structures. What are the advantages and disadvantages of this approach?
Are they related to anti-freezing, water softening, and environmental considerations regarding wastewater discharge?
Are there specific elements in the coal ash composition that are harmful to the water wall, or are the viscosity-temperature properties of the coal ash poor, which makes it difficult for slag to accumulate on the water wall?
A gray melting point of 1400 represents a challenge as well for refractory bricks; how long can their lifespan be? Could it end up being more harm than good?