Slag accumulation on the water wall
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May I ask what are the main components of the slag that adheres to the water wall? Is there an analysis report?
It should be gray; do a search to see if anyone has conducted research on this topic. The most research on gray has been done by Professor Li Wen from the Shanxi Coal Chemistry Institute, so you might want to take a look at his work
It’s the ash in coal that is burned to a liquid state and then condensed on the water wall; it also contains coal that has been burned
Is it possible that the alkali metal oxides K2O and Na2O present in coal ash could form sodium sulfate and potassium sulfate, which then, in combination with V2O6, would create low-melting eutectics leading to \"corrosion by molten ash\"?
The composition of the slag attached to the water wall is mainly related to the ash content of the coal used for gasification. Normally, for proper slag formation on the water wall, the ash needs to be in a molten state, possess a certain degree of fluidity, as well as have a certain viscosity. The liquidity is poor, making it difficult to achieve uniform slag deposition ； The viscosity is too high, resulting in poor flowability. You can refer to Professor Yu Zunhong’s book on coal gasification technology. Chapter 7 provides an introduction to these. Our forum has this book.