by U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory in Research Triangle Park, NC .
Written in English
|Statement||C.D. Stephenson, T.A. Burnett, and R.L. Torstrick|
|Contributions||Burnett, T. A, Torstrick, R. L, Air and Energy Engineering Research Laboratory|
|The Physical Object|
|Pagination||5 p. :|
Get this from a library! Economic evaluation of a sodium/limestone double-alkali FGD process. [C D Stephenson; T A Burnett; R L Torstrick; Air and Energy Engineering Research Laboratory.]. EPA Number ECDP B-4 DEFINITIVE SO CONTROL PROCESS EVALUATIONS LIMESTONE, DOUBLE-ALKALI, AND CITRATE FGD PROCESSES by S. V. Tomlinson, F. M. Kennedy, F. A. Sudhoff, and R. L. Torstrick Tennessee Valley Authority Office of Power Emission Control Development Projects Muscle Shoals, Alabama Interagency Agreement EPA D9-EBI (TVA) Program . Although the sodium/limestone double-alkali process appears to be about 8% lower in capital investment, given the accuracy associated with studies of this type (+ or %), it is uncertain if the. adopting the limestone-gypsum wet-process flue gas desulfurization t echnology have l ocal iz a tion rati o o f around 90%, some flue gas desulfu rization p rojects more than 95% and equip ment fo.
PROCESS ECONOMICS PROGRAM SRI INTERNATIONAL Menlo Park, California Abstract Process Economics Program Report No. 63B SULFUR DIOXIDE REMOVAL FROM FLUE GASES. Wet type flue gas desulfurization (FGD) using lime or limestone is popular because of its operational simplicity and the availability of lime and limestone. Seawater FGD (SWFGD) utilizes the. Wang K H, Biochini R J, Legatski L K, Sodium-limestone double alkali flue gas desulfurization method[P], United States Patent, 4, , Wilkinson P M, Doldersum B, Cramers P H et al., The kinetic of uncatalyzed sodium sulfite oxidationfJ]. Chem Eng Sci, 48(5): Wu Z B, Liu Y, Tan T E, Study of dual-alkali FGD. Limestone, constituted mainly by calcium carbonate, is widely utilized in Flue Gas Desulfurization (FGD) processes because of the ability to capture the sulfur as sulfate salts. The evaluation of limestone reactivity is therefore a key aspect for FGD process design and plant operation.
Wet limestone FGD system is capable of removing SO 2 with efficiencies from 92% to 98%.. Wet lime and magnesium-lime FGD systems. Lime scrubbing uses CaO, usually 90%, to remove SO 2 from the gaseous stream. Lime is more reactive than limestone slurry, but it is more Magnesium Enhanced Lime (MEL) process is a variation of the lime process that . Table SUMMARY OF FGD PROCESSES ON U.S. COAL-FIRED UTILITY BOILERS Process Limestone Lime Alkaline fly ash with lime or limestone Sodium carbonate Magnesium oxide Double alkali Wellman Lord Aqueous carbonate Operational No. 9 9 2 3 1 — 1 - MW 3, 2, - — Construction No. 16 9 1 - - 1 2 - MW 6, 4, of a limestone-based wet FGD process is shown schemati- sodium thiosulfate is added to the limestone slurry feed. Economic Evaluation of Flue Gas Desulfurization Systems;. Flue Gas Desulfurization. Flue gas desulfurization (FGD) is a very common method for gas claning adopted in a gas processing plant. In this process, the flue gas with acid vapors is scrubbed to remove it as a by-product. Most of the FGD processes use alkali to scrub the flue gas. Many designers of FGD adopt the limestone gypsum process.