Results of CWS reburn tests on a 10 x 10{sup 6} Btu/hr tower furnace and its impact on CWS reburn economics

Conference · Tue Jul 01 04:00:00 EDT 1997

OSTI ID:490349

Ashworth, R A; Maly, P M; Carson, W R

On December 19, 1996, the US Environmental Protection Agency (EPA) set new regulations for Phase I Group I and Phase II Group 2 utility boilers (40 CFR Part 76). The Group 1 boilers have commercially available low cost NOx control techniques that may be applied. Group 2 boilers comprise cyclone-fired, cell burner-fired, wet bottom, dry bottom vertically-fired, stoker-fired, and fluidized bed combustors. For most of the Group 2 boilers, there are low cost retrofit technologies that can be applied to meet the new Federal regulations. However, a low cost option for cyclone-fired units has not as yet been demonstrated. The NOx emission regulation for electric utility cyclone-fired boilers is 0.86 lb/10{sup 6} Btu for units greater than 155 MWe. In light of the impending regulation the Tennessee Valley Authority (TVA) contracted with the Energy and Environmental Research Corporation (EER) to complete a series of tests to characterize coal water slurry (CWS) as a reburn fuel for use on one of its cyclone-fired units. Comparative analyses were also completed using natural gas as a reburn fuel. The non-proprietary portion of the test results are presented in this paper. Based on the test results, capital and operating costs were revisited for CWS Reburning and the NOx reduction economics of this technology was re-evaluated.

• OSTI ID: 490349
• Report Number(s): CONF-970310--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
03 NATURAL GAS
BOILERS
COAL
ECONOMICS
EMISSION
FUEL SLURRIES
NATURAL GAS
NITROGEN OXIDES
RETROFITTING
STAGED COMBUSTION