A new cooling water treatment program balances refinery and petrochemical plant needs
Betz Laboratories Inc.'s Dianodic II treatment program provides corrosion prevention results comparable to those with chromate-based treatment; it also provides a greater resistance to system upsets and more rapid repassivation if an upset occurs than other nonchromate corrosion control programs. The program uses 10-17 ppm calcium orthophosphate to promote anodic passivation, a patented calcium orthophosphate precipitation inhibitor that allows the use of high phosphate levels, and a calcium carbonate deposit control agent. An economic comparison shows that operating costs required to meet environmental regulations would be $169,000/yr for the Dianodic II process vs. $222,000-$309,000/yr for processes such as ion exchange or zero blowdown, which use chromate corrosion inhibitors followed by various methods of chromate removal from the blowdown to meet EPA regulations. Dianodic II has been successfully used in admiralty brass, cupro-nickel, and mild or stainless steel heat exchangers at heat fluxes < 15,000 Btu/sq ft, retention times of less than 12 days, calcium carbonate concentrations less than or equal to 1000 ppm, bulk water temperatures less than or equal to 170/sup 0/F, heat exchanger skin temperatures less than or equal to 200/sup 0/F, and other extreme conditions.
- Research Organization:
- Betz Lab. Inc.
- OSTI ID:
- 6367377
- Report Number(s):
- CONF-8003198-
- Journal Information:
- Natl. Refiners Assoc. Annu. Meet. Pap.; (United States), Journal Name: Natl. Refiners Assoc. Annu. Meet. Pap.; (United States) Vol. AM-80-54
- Country of Publication:
- United States
- Language:
- English
Similar Records
Water treatment cuts deposition at oil and solvent recovery plant
A practical application for the chemical treatment of Southern California`s reclaimed, Title 22 water for use as makeup water for recirculating cooling water systems
Related Subjects
020800* -- Petroleum-- Waste Management
CHEMISTRY
CONTROL
COOLING SYSTEMS
CORROSION PROTECTION
COST
ENERGY SYSTEMS
HYDROGEN COMPOUNDS
INDUSTRY
INHIBITION
LIQUID WASTES
MANAGEMENT
OPERATING COST
OXYGEN COMPOUNDS
PERFORMANCE
PETROLEUM INDUSTRY
POLLUTION CONTROL
PRECIPITATION
PROCESS CONTROL
PROCESSING
SEPARATION PROCESSES
SPECIFICATIONS
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER CHEMISTRY
WATER TREATMENT