How effective is the circulation of pure caustic soda solution in the alkali washing of liquefied gas?
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How effective is the circulation of pure caustic soda solution in the alkali washing of liquefied gas? What should be the concentration of the caustic soda solution?
What does that mean? Lye not regenerating? The effect is the same; as long as the concentration is maintained, it’s generally between 6-10%. It’s just that this way, the consumption of alkali increases.
The concentrated caustic solution is at a concentration of 30%. For pre-alkaline washing, it is diluted to 10% and mixed with unpurified air before being fed into the pre-alkaline washing tank. The caustic solution is recycled; fresh caustic solution is added periodically, while the alkali sludge is drained off