How to prevent and control silicate scaling in pipelines and quench chambers in GE coal water slurry gasification
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How does GE’s water-coal slurry gasification prevent and control silicate scaling in pipelines and quench chambers? As for silicate scaling, in my opinion it belongs to the relatively hard type among those I have seen before; its strength is not high, and it has a very dark color. I wonder whether it still counts as a form of silicate scaling. Let’s discuss it together.
After each shutdown, a layer of not very thick scale (1-2 mm) forms on the quench chamber and black water pipelines; once cooling takes place, part of this scale can come off and is washed away by the water. Is this what you mean?
The scaling in the quench water pipeline and quench chamber is probably not silicate scale, as silicate scale is not easy to remove; it is more commonly encountered in water treatment processes.
This is usually caused by scaling from alkaline substances.
Is silicate brought in from coal, from an original perspective?
Silicate scaling is formed later in the system. But silicon must come from coal.