Confined zone dispersion flue gas desulfurization demonstration [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Energy, 1991.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- Pages: (74 pages) : digital, PDF file
- Additional Creators
- United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- The CZD process involves flue gas post-treatment, physically located between a boiler's outlet and its particulate collector, which in the majority of cases is an electrostatic precipitator. The features that distinguish this process from other similar injection processes are: Injection of an alkaline slurry directly into the duct, instead of injection of dry solids into the duct ahead of a fabric filter. Use of an ultrafine calcium/magnesium hydroxide, type S pressure-hydrated dolomitic lime. This commercial product is made from plentiful, naturally occurring dolomite. Low residence time, made possibly by the high effective surface area of the type S lime. Localized dispersion of the reagent. Slurry droplets contact only part of the gas while the droplets are drying, to remove up to 50 percent of the SO₂ and significant amounts of NOₓ. The process uses dual fluid rather than rotary atomizers. Improved ESP performance via gas conditioning from the increased water vapor content, and lower temperatures. Supplemental conditioning with SO₃ is not believed necessary for satisfactory removal of particulate matter. The waste product is composed of magnesium and calcium sulfite and sulfate, with some excess lime. This product mixed with fly ash is self-stabilizing because of the excess lime values, and thus tends to retain heavy metals in insoluble forms within the fly ash.
- Report Numbers
- E 1.99:doe/pc/90546-t3
doe/pc/90546-t3 - Subject(s)
- Other Subject(s)
- Electrostatic Precipitators
- Performance
- Flue Gas
- Desulfurization
- Nitrogen Oxides
- Removal
- Sulfur Dioxide
- Air Pollution Control
- Alkali Metal Compounds
- Bituminous Coal
- Calcium Hydroxides
- Calcium Oxides
- Demonstration Plants
- Dolomite
- Fly Ash
- Hot Gas Cleanup
- Magnesium Hydroxides
- Progress Report
- Slurries
- Sorbent Injection Processes
- Surface Area
- Aerosol Wastes
- Alkaline Earth Metal Compounds
- Ashes
- Black Coal
- Calcium Compounds
- Carbonaceous Materials
- Carbonate Minerals
- Chalcogenides
- Chemical Reactions
- Coal
- Combustion Products
- Control
- Dispersions
- Document Types
- Energy Sources
- Equipment
- Fossil Fuels
- Fuels
- Gaseous Wastes
- Hydrogen Compounds
- Hydroxides
- Magnesium Compounds
- Materials
- Minerals
- Mixtures
- Nitrogen Compounds
- Oxides
- Oxygen Compounds
- Pollution Control
- Pollution Control Equipment
- Purification
- Residues
- Sulfur Compounds
- Sulfur Oxides
- Surface Properties
- Suspensions
- Wastes
- Note
- Published through SciTech Connect.
09/05/1991.
"doe/pc/90546-t3"
"DE92003084"
Bechtel Corp., San Francisco, CA (United States) - Funding Information
- FC22-91PC90546
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