초록 ▼

An inhibitor formulation for inhibiting corrosion and deposition of calcium phosphate, calcium carbonate, and silt in a cooling water system and calcium sulphate (gypsum) scaling in a flue gas desulfurization system. The inhibitor formulation comprises polyacrylate, polymaleic anhydride, and phospho

An inhibitor formulation for inhibiting corrosion and deposition of calcium phosphate, calcium carbonate, and silt in a cooling water system and calcium sulphate (gypsum) scaling in a flue gas desulfurization system. The inhibitor formulation comprises polyacrylate, polymaleic anhydride, and phosphonate in a active weight ratio range between about 1 to 40:1 to 40:0.1 to 15, respectively. The inhibitor formulation is employed to inhibit corrosion and scaling in a combined cooling water/flue gas desulfurization process wherein at least a portion of cooling water blowdown is supplied to make up at least a portion of reagent makeup and/or mist eliminator wash water in the flue gas desulfurization system.

대표청구항 ▼

A combined cooling water/flue gas desulfurization process comprising: (a) contacting a gas with water in a cooling tower said gas having a lower temperature than said water such that upon contact said water is cooled by the transfer of thermal energy from said water to said gas, said water comprisin

A combined cooling water/flue gas desulfurization process comprising: (a) contacting a gas with water in a cooling tower said gas having a lower temperature than said water such that upon contact said water is cooled by the transfer of thermal energy from said water to said gas, said water comprising between about 0.2 and about 100 ppm active by weight of an inhibitor formulation comprising polyacrylate, polymaleic anhydride, and phosphonate; (b) contacting a sulfur-containing gas with reagent slurry in a flue gas desulfurizer thereby desulfurizing said sulfur containing gas; and (c) supplying at least a portion of said water from said cooling tower to make up at least a portion of wash water in said desulfurizer, said water being supplied in an amount sufficient to maintain between about 0.01 and about 20 ppm active by weight of said inhibitor formulation in said reagent wash water.