What is the impact of the amount of limestone added to water-coal slurry on the gasifier?
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What is the impact of the amount of limestone added to coal water slurry on the operation of the gasifier, and in what specific ways? Please provide examples.
Adding too much will exacerbate scaling in the graywater system, while adding too little is not conducive to slag removal; the coal ash melting point should be used as a guide!
Used to lower the ash melting point of coal, allowing the gasification furnace to operate at lower temperatures; this reduces oxygen consumption and extends the lifespan of refractory materials
The main purpose of adding limestone is to lower the ash melting point, thereby enabling the slag to reach a molten state at a relatively lower furnace temperature. Of course, limestone is added only when the ash melting point of coal is high. Adding too much reduces the ash fusion point, but at the same time it increases the amount of ash, which places a heavy burden on the subsequent ash treatment flash evaporation system and is also detrimental. Make sure to use enough of it; it has both advantages and disadvantages...