The vacuum degree of the negative pressure system of vacuum potassium carbonate desulfurization process directly affected the regeneration of the desulfurizer liquor.In case of air leakage into the negative pressure system during production,it would affect the H2S content in gas after desulfurization.Through analysis of the interrelation between the abnormal phenomenon and the abnormal parameters,the main cause of H2S content in gas was found.By taking measures,the H2S content in gas has dropped to a normal level.

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