Chemical formulation and combined process for inhibiting deposition and corrosion in cooling water and gypsum scaling in flue gas desulfurization scrubber systems

Patent · Tue May 30 04:00:00 EDT 1989

OSTI ID:5718303

Mouche, R J; Lin, M L; Ekis, Jr, E W

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

• Assignee: Nalco Chemical Co., Naperville, IL
• Patent Number(s): US 4834955
• OSTI ID: 5718303
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020800* -- Petroleum-- Waste Management
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACRYLATES
AIR POLLUTION CONTROL
ALKALINE EARTH METAL COMPOUNDS
ANHYDRIDES
CALCIUM COMPOUNDS
CALCIUM SULFATES
CARBOXYLIC ACID SALTS
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CONTROL
COOLING TOWERS
CORROSION INHIBITORS
CORROSION PROTECTION
DESULFURIZATION
DICARBOXYLIC ACIDS
EQUIPMENT
FLUE GAS
GASEOUS WASTES
GYPSUM
HYDROGEN COMPOUNDS
INHIBITION
MALEIC ACID
MECHANICAL STRUCTURES
MINERALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHONATES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SCRUBBERS
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
TOWERS
WASTES
WATER