Design and comparison of the up-to-standard discharge scheme for blow-down water of circulating cooling system in a power plant

Abstract

In view of the problem of circulating cooling system blow-down water treatment in a power plant，a scheme to reduce the salt content and sulfate concentration in the circulating cooling system blow-down water was proposed by using nano-filtration technology to meet the local environmental protection standards and realize the up-to-standard discharge. Moreover， a technical and economic comparison with the circulating water bypass desalination treatment scheme using reverse osmosis technology were made. The impact of the two schemes on the zero discharge of desulfurization waste water from the power plant were fully considered in the comparison and selection of the schemes. The result showed that the scheme of standard discharge after nano-filtration treatment had more advantages.

Keywords

• circulating cooling system blow-down water
• up to standard discharge
• nano-filtration technology