Engineered MSW Fuels can Reduce NOx and Other Emissions

Authors

  • Allen Williams P. E.

DOI:

https://doi.org/10.53555/ephse.v6i4.1677

Abstract

A five year feasibility study was conducted using process modeling to design new fuels that could inherently reduce nitric oxides, sulfur dioxide and mercury emissions in power generation. The commercial station chosen for the study was a northeastern utility in Homer City with a history of emission difficulties. Heat data for the utility's unit 3 was available from diagnostic work done at this station back in the early 1980s. Unit 3 has a pulverized coal (with CE Raymond Mills) balance draft steam generator with single stage reheat rated at 4,280,000 lb steam per hour. The Turbine is a 692 MW four valve unit operating in variable pressure mode. The unit utilizes two steam driven boiler feed pumps. The company has been involved in a number of lawsuits over excessive emissions releases and has sought ways to successfully address the issue. New pollution abatement equipment coming on line at Homer City from various legal settlements has produced significant benefits. In 1995, Homer City discharged 127383 pounds (57.780 metric tons) of SO2 (4). In 1998, Homer City Generating Station produced a total (air and other) of 2,963 pounds (1,344 kg) of mercury according to the Environmental Working Group. In 2001, a wet scrubber desulfurisation system for Unit 3 (2) was installed which enabled the plant to burn less expensive, higher sulfur coal, while still meeting environmental standards for sulfur emissions.  In 2012 General Electric assumed full control of Unit 3 hiring NRG energy services the following year to operate it. The Pennsylvania plant was in its second bankruptcy in five years (1)  in legal actions resulting from excessive sulfur dioxide and other pollutant emissions. In 2016 Homer City generated 11,287.9 tons SO2 and by 2017 just 4,904.2 tons of nitrogen oxides.(5)

Downloads

Download data is not yet available.

References

(1) 'Homer City Power Plant Involved in Second Bankruptcy in Five Years', Power Engineering Magazine, Jan 12, 2017

(2) EME Homer City Generation, Securities and Exchange Commission, Form10-K, Dec 31, 2001

(3) Evaluating Green projects: Modeling Improves Economic Benefits, Allen Williams, Ken Dunwoody, Chemical Engineering Magazine, Vol 119, No 7, July 2012

(4) Coal Energy Coal Power Plants, Coal Power Plant Technology, https://coalpowerplants.blogspot.com/, Feb 2011

(5) Area power plants see drastic drop in emissions, Patrick Cloonan, Indiana Gazette, April 15, 2018

(6) Ebasco Hat Creek Project Air Quality Control Study, British Columbia Hydro and Power authority, EISR No 29, Oct 1979

(7) 'Preferred and Alternate Methods for Estimating Air Emissions from Boilers, EIIP Vol II, Ch 2, Jan 2001

(8) An Overview Of Technologies For Reduction Of Oxides Of Nitrogen From Combustion Furnaces, Bell R.D,, Buckingham F.P., MPR Associates, Inc, Rev 0

(9) Researchers accidentally find industrial waste, orange peel material sucks mercury out of water, ABC News The World Today, Lucy Carter, Oct 19, 2015

(10) Improved Heat Transfer Management through Sootblowing Optimization on a Cyclone-Fired Unit, T. Schmidt, J.A. Brown, Power Generation, Intl, Dec 13-15 2011

(11) Struggling to Compete with Natural Gas, Pennsylvania Coal Plant Files for Bankruptcy,, Aaron Larson, Power Magazine, Jan 13, 2017

(12) Combustion Control of Pollutants from Multi-Burner Coal-Fired Systems, C. McCann, J. Demeter, R. Snedden, D. Bienstock, US Environmental Protection Agency, EPA-650/2-74-038, May 1974

(13) CFD Modeling of Reduction in NOX Emission Using HiTAC Technique, A. Khoshhal, M. Rahim, S.R. Shabanian, A.A. Alsairafi, World Academy of Science, Engineering and Technology, International Journal of Mechanical and Mechatronics Engineering Vol:4, No:2, 2010

(14) Fuel-N Conversion to NO, N2O and N2 During Coal Combustion, Stanis?aw Gil, Silesian University of Technology Poland, www.intechopen.com

(15) Steam Its Generation and Use, Table - Coal Analysis On as received basis, p 5-9, Babcock &Wilcox, 1972

(16) Chemical Analyses and Physical Properties of 12 Coal Samples from the Pocahontas Field, Tazewell County, Virginia, and McDowell County, West Virginia,Virgil A. Trent, Jack H. Medlin, S. Lynn Coleman, and Ronald W. Stanton, Geological Survey Bulletin 1528, United States Government Printing Office, Washington: 1982

(17) Physical and Thermodynamic Properties of Elements and Compounds, United Catalysts, Inc, Table II, p.29

Published

2020-04-30

How to Cite

[1]
A. W. P. E., “Engineered MSW Fuels can Reduce NOx and Other Emissions”, EPH IJSE, vol. 6, no. 4, pp. 19–33, Apr. 2020.