I would like to ask about the coking issue in water-coal slurry! !
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As the title suggests: I would like to ask what are the main causes of coking problems in coal-water slurry combustion? Is the alkalinity of the additive too high? Effect of Fe ions? Is it still the high ash content in the coal? Does anyone know that if it’s a problem with additives, what types of additives are prone to causing issues? What type won’t cause any problems? I hope you will kindly share your insights! ! !
The gasification temperature is too low; it needs to be increased.
Reply to 1# zhiquan: I don’t quite understand what you mean! Coking? Where is the coking occurring?
Is it furnace coking in the water-coal slurry steam boiler?
Reply to 1# zhiquan: It’s mainly a problem with the type of coal, and secondly, your operating temperature is too high.
It’s the coking that occurs when the boiler burns water-coal slurry; it’s not gasification! ! I think it might be due to the ash issue; does anyone know what components are present in the ash? What are the melting points of each component?
Minerals such as clay, gypsum, carbonates, and pyrite undergo decomposition and chemical reactions during the combustion of coal; some of them turn into gases and escape, while the remaining residue is ash.
Let’s create a viscosity-temperature characteristic curve for the raw coal···· If it’s too narrow, the operating temperature range will be very limited