Recycle/reuse of boiler chemical cleaning wastes in wet limestone flue gas desulfurization (FGD) systems

Conference · Fri Jan 01 00:00:00 EST 1988

OSTI ID:7050717

Stohs, M; Owens, D R ^[1]; Micheletti, W ^[2]

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1. Radian Corp. (US)
2. Electric Power Research Inst., Palo Alto, CA (USA)

Boiler chemical cleaning wastes (BCCW) are generated by the periodic waterside cleaning of utility boilers to remove metallic deposits from boiler tube surfaces. Depending on boiler metallurgy, BCCW generally contain high concentrations of iron and copper or both, as well as other heavy metals such as chromium, lead, nickel, and zinc. BCCW treatment and disposal methods include precipitation, coponding in an ash pond, evaporation in the fireside of an operating boiler (for organic solvents), and contracted off-site disposal. Depending on the type of BCCW chemical treatment methods achieve varying degrees of success. BCCW which contain organic chelating agents can be especially difficult to treat to national pollutant discharge elimination system (NPDES) limits (1 mg/L for both iron and copper) with conventional lime precipitation.Research is being done to evaluate different BCCW treatment and disposal methods. One waste management option under consideration is reuse of BCCW in utility wet flue gas desulfurization (FGD) systems. To investigate this option, a series of laboratory tests were performed in which five different types of BCCW were added to the reaction tank of EPRI's bench-scale wet limestone FGD system. This paper presents the results and conclusions from this study.

• OSTI ID: 7050717
• Report Number(s): CONF-880679-
• Resource Relation: Conference: 81. annual meeting of Air Pollution Control Association, Dallas, TX (USA), 19-24 Jun 1988; Other Information: 88-29.1; Related Information: Volume 2
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
42 ENGINEERING
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BOILERS
CLEANING
ELECTRIC UTILITIES
FLUE GAS
DESULFURIZATION
CHROMIUM
DEPOSITS
EPRI
INDUSTRIAL WASTES
LEAD
LIME-LIMESTONE WET SCRUBBING PROCESSES
NICKEL
RESEARCH PROGRAMS
WASTE MANAGEMENT
ZINC
CHEMICAL REACTIONS
ELEMENTS
GASEOUS WASTES
MANAGEMENT
METALS
PUBLIC UTILITIES
SCRUBBING
TRANSITION ELEMENTS
WASTES
200200* - Fossil-Fueled Power Plants- Waste Management
421000 - Engineering- Combustion Systems
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management