Sulfite aqueous treatment agent and water treatment method

摘要

Problem to be solved: to provide a preferable anti-corrosion property and to prevent sulfite ion oxidation and provide a sulfite type aqueous treatment agent having excellent storage stability.Solution: a sulfite aqueous treatment agent added to a boiler feed, containing sulfite, silicic acid or silicate, ethylenediaminetetraacetic acid or salt thereof, wherein the concentration of sulfite is 10 to 25% by weight, and the silicate or silicate derived silicon dioxide concentration is 1 to 15 The concentration of ethylenediaminetetraacetic acid or its salt is 0.01% by mass, the sulfite based water treatment agent.No selection