Abstract:the existing problems of vacuum potassium carbonate desulfurization system are analyzed: the desulfurization solution is seriously polluted; The vacuum at the top of the regeneration tower is low and the regeneration effect is poor; High temperature of desulfurization lean solution; Large alkali consumption. In view of the above problems, the hydrogen sulfide index after desulfurization can meet the production requirements through technical transformation, optimizing process index and standardizing staff operation.