Results of limestone clear liquor scrubbing tests at EPRI`s Environmental Control Technology Center (ECTC)
- Radian Corporation, Austin, TX (United States)
- Codan Associates, Sandy, UT (United States); and others
In a continuing effort to offer lower cost SO{sub 2} control alternatives for its member utilities, EPRI has developed and tested a limestone clear liquor scrubbing using the 0.4-MW{sub e} mini-pilot FGD system at EPRI`s Environmental Control Technology Center. In the first-phase of testing, existing equipment was used to evaluate the feasibility of the process concept. Following the encouraging Phase I results, a pilot-scale sludge bed limestone reactor was designed and fabricated for a second-phase of testing. Tests have been conducted in both inhibited and forced oxidation modes. Variables investigated include: type of organic acid, buffer concentration, solid-phase residence time, pH, L/G, and chloride level. Results show that the clear liquor process can achieve SO{sub 2} removal and solids properties equivalent to or better than that of an enhanced slurry process without scale build-up. Preliminary economics indicate that the clear liquor gypsum process could reduce overall capital and operating expense by 5 to 10% relative to an organic acid-enhanced slurry process and by 15 to 20% relative to a conventional, unenhanced limestone process.
- Research Organization:
- Electric Power Research Inst. (EPRI), Palo Alto, CA (United States)
- OSTI ID:
- 123452
- Report Number(s):
- EPRI-TR-105258-Vol.2; CONF-950332-Vol.2; TRN: 95:007572-0027
- Resource Relation:
- Conference: 15. EPRI-EPA-DOE SO/sub 2/ control symposium, Miami Beach, FL (United States), 28-31 Mar 1995; Other Information: PBD: Jun 1995; Related Information: Is Part Of Proceedings: 1995 SO{sub 2} control symposium. Volume 2, Sessions 4a, 4b, 5a, 5b; PB: 350 p.
- Country of Publication:
- United States
- Language:
- English
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