Is there a way to reuse the sodium carbonate desulfurization ash from coke oven flue gas as waste?
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In the semi-dry method for treating coke oven flue gas, sodium carbonate is used to remove SO2 from the gas; the desulfurization ash produced contains 90% sodium sulfate, 8% sodium carbonate, and a small amount of 2% free carbon. Is this ash useful? Which industries can use it as a raw material?
Acids and bases react, and it’s a bit difficult to turn the salt back into a base. Are there any examples of such regeneration?
It is not regenerated in this way; instead, it is converted into carbonic acid and sodium sulfide through high-temperature reduction, and sodium sulfate is then decomposed using CO2 stripping, with the end product being sodium carbonate
Send it to the small sodium silicate factory via UDP.
Sending it to small sodium silicate factories as raw material serves two purposes at once
Concrete additives can consume a portion of it
Sodium sulfate is one of the raw materials for glass, but due to impurities resulting from desulfurization, it is likely that no one will want it; this process is generally more suitable for use in the glass industry
There are far too few manufacturers who can utilize desulfurization ash, or those who might potentially use it