Record Display for the EPA National Library Catalog

RECORD NUMBER: 11 OF 66

OLS Field Name OLS Field Data
Main Title Burner design criteria for NOX control from low-BTU gas combustion : volume I. ambient fuel temperature /
Author Shoffstall, Donald R.
CORP Author Institute of Gas Technology, Chicago, Ill. Applied Combustion Research.;Industrial Environmental Research Lab., Research Triangle Park, N.C.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, Industrial Environmental Research Laboratory ; For sale by the National Technical Information Service,
Year Published 1977
Report Number EPA 600/7-77/094a; EPA-68-02-1360
Stock Number PB-272 614
OCLC Number 38872907
Subjects Gases--Thermal properties. ; Combustion. ; Nitrogen compounds.
Additional Subjects Air pollution control ; Burners ; Nitrogen oxides ; Temperature ; Design criteria ; Performance evaluation ; Manufactured gas ; Pilot plants ; Combustion products ; Industrial wastes ; Flames ; Electric power plants ; Fuel consumption ; Coal gasification ; Process charting ; Furnaces ; Boilers ; Low btu gas ; Medium btu gas
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=9101CZN2.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJBD ARCHIVE EPA 600-7-77-094a Headquarters Library/Washington,DC 10/23/2012
EKAM  EPA 600/7-77/094a Region 4 Library/Atlanta,GA 04/10/1998
EKBD  EPA-600/7-77-094a Research Triangle Park Library/RTP, NC 11/14/2003
ESAD  EPA 600-7-77-094A Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-272 614 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation viii, 109 p. : ill. ; 28 cm.
Abstract
The report gives results of a research program initiated to characterize problems associated with retrofitting existing utility boilers with low- and medium-Btu gases produced using commercially available coal conversion processes. All experimental results were gathered from a pilot-scale furnace fired with a movable-vane boiler burner at a heat input of 0.66 MW (2.25 million Btu/h). The synthetic gases tested, ranging in heating value from 3.7 to 11.2 MJ/cu m (100 to 300 Btu/SCF), were produced using a natural gas reformer system. Data were collected to permit a comparison between natural gas and the synthetic gases in the areas of flame stability, flame length, flame emissivity, furnace efficiency, and NOx emissions. Flame stability was found to be very sensitive to fuel jet velocity. An injection velocity of 30.5 m/s (100 ft/s) was found to be optimum. Flame length decreased with increasing movable-vane angle (swirl of the combustion air): flames of the synthetic gases tested generally were shorter than those of natural gas. Good agreement was obtained between measured and calculated flame emissivities. Some boiler modifications would be necessary to maintain rating when burning gases of less than 7.5 MJ/cu m (200 Btu/SCF) heating value. NO emissions were ordered by adiabatic flame temperature. The NO emissions data yielded an activation energy of 153 kcal/mole compared to kinetic model predictions of 135 kcal/mole.
Notes
"EPA-600/7-77-094a." Prepared by Applied Combustion Research, Institute of Gas Technology, Chicago, Ill., for U.S. Environmental Protection Agency, Office of Research and Development, under contract no. 68-02-1360, program element no. EHE624a. EPA project officer: David G. Lachapelle. Includes bibliographical references.
Contents Notes
This research program was initiated to characterize problems associated with retrofitting existing utlity boilers with low- and medium-Btu gases manufactured from commercially available coal conversion processes. All the experimental results were gathered from a pilot-scale furnace fired with a movable-vane boiler burner at a heat input of 0.66 MW (2,250,000 Btu/h). The low- and medium-Btu gases tested ranged in heating value from 3.7 to 11.2 MJ/m3 (100 to 300 Btu/SCF). They were synthetically produced with a natural gas reformer system. Data were collected to permit a comparison between natural gas and low-Btu gases in the areas of flame stability, flame length, flame emissivity, furnace efficiency, and NOx emissions. Flame stability was found to be very sensitive to fuel jet volocity. An injection velocity of 30.5 m/s (100 ft/s) was found to be optimum. Flame length decreased with increasing movable vane angle (swirl of the combustion air), and the low- and medium-Btu gases tested were generally shorther than those of natural gas. Good agreement was obtained between measured and calculated flame emissivities. Some boiler modifications would be necessary to maintain rating when burning gases of less thatn 7.5 MJ/m3 (200 Btu/SCF) heating value. NO emissions were ordered by adiabatic flame temperature. The NO emission data yielded an activation energy of 153 k-cal/mole compared to kinetic model predictions of 135 k-cal/mole. The use of adiabatic flame temperature provided a good empirical method of predicting NO emissions for the fuels tested.