Alternative solutions for reducing NO{sub x} emissions from cell burner boilers
Technical Report
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OSTI ID:374511
An economical solution for reducing NO{sub x} emissions from coal fired utility boilers equipped with pre-New Source Performance Standard (pre-NSPS) cell burners is being developed. Since over 12% of the U.S. generating capacity is produced from cell burner boilers, this development is very significant for the utility industry. Cell burners, manufactured in the 1950`s and 1960`s, rapidly mix the pulverized coal and combustion air resulting in highly turbulent and efficient combustion. Typical NO{sub x} emissions from cell burner boilers average 1.0 to 1.8 lb/10{sup 6} Btu. This paper presents the results of retrofitting American Electric Power`s Muskingum River Unit 5, a 600 MWe supercritical. cell burner boiler, with Riley low NO{sub x} CCV{trademark} burners. Initial results demonstrated the ability to reduce NO{sub x} emissions greater than 50% without the requirement for overfire air, off stoichiometric firing, burner respacing, mill system and coal piping changes or pressure part modifications. Long term operation, which recently included switching coals, has resulted in some deterioration in NO{sub x} performance. Results of the initial optimization testing are presented along with plans for reoptimizing unit operation to restore the low NO{sub x} levels. Plans for developing Riley`s {open_quotes}next generation{close_quotes} low NO{sub x} pulverized coal burner (CCV II) will also be presented. The intent is to potentially utilize this advanced design on other cell burner units in American Electric Power`s system for improved NO{sub x} reduction performance.
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (United States)
- OSTI ID:
- 374511
- Report Number(s):
- EPRI-TR--105978-V3; CONF-9505150--Vol.3
- Country of Publication:
- United States
- Language:
- English
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