PRODUCTION METHOD FOR ACIDIC COMPONENT REMOVER, AND METHOD FOR REMOVING ACIDIC COMPONENT IN GAS

摘要

Provided is a production method for an acidic component remover that suppresses the increase in pressure loss in a filter cloth of bag filter and the leakage of acidic component remover from the filter cloth, is less likely to cause emission trouble from a silo, is excellent in handling property, and can sufficiently suppress the omission of the filtration layer accumulated on the surface of the filter cloth. A method for producing powders of an acidic component remover, comprising: mixing powders of sodium bicarbonate (A) having a mean particle size of 50 µm or more, powders of hydrophobic fumed silica (B), and powders of colloidal calcium carbonate (C) having a mean particle size of 50 nm or less in the primary particles; and pulverizing the resultant mixture, wherein the mean particle size of the obtained acidic component remover is 3 to 20 µm, the proportion of the hydrophobic fumed silica (B) in the acidic component remover is 0.2 to 0.5 wt%, and the proportion of the colloidal calcium carbonate (C) in the acidic component remover is 1.5 to 2.5 wt%.