Actions for Combustion of char from pyrolyzed wood waste

Email RIS file
Bookmark
Report an Issue

Combustion of char from pyrolyzed wood waste

Author
Demeter, J. J.
Published
United States : [publisher not identified], 1977.
Springfield, Va. : National Technical Information Service, [approximately 1977]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Bienstock, Daniel, 1917-, Ekmann, J. M., and McCan, C. R.

Availability

Browse Nearby on Shelf
I Want It
I Want It

Finding items...

Summary
The combustion and handling characteristics of char produced by pyrolysis of wood waste were determined in a 500 lb/hr pulverized-coal-fired (PCF) combustion test facility and as a slurry with No. 6 oil in a 100 HP oil-fired boiler. In the PCF combustor, tests were also run with a 50-50 blend of Pittsburgh-seam high-volatile coal with a high-volatile pyrolytic char as well as with a low-volatile pyrolytic char. Stable combustion could be maintained with a secondary air-preheat temperature of 600/sup 0/F, the temperature generally used when firing coal, at a carbon-combustion efficiency of 97.3 to 98.6 percent. With the low-nitrogen content of the char, nitrogen oxide emissions were very much lower than those obtained from coal (0.25 compared to 0.80 lb NO/sub 2//10/sup 6/ Btu) at the same firing conditions. The NO/sub x/ emissions obtained with the 50-50 blends appeared to be an average of the values obtained for the fuels separately. Similarly, the SO/sub 2/ emission was low with the char alone (0.18 lb SO/sub 2//10/sup 6/ Btu), and the emissions obtained with the blends were an average of the values obtained with the fuels separately. A 60-40 blend of pulverized char and the oil produced during pyrolysis combined with No. 6 fuel oil to obtain a slurry containing 30 percent char performed well in a 100 HP oil-fired firetube boiler modified to fire coal-oil slurries. Excellent flame stability was experienced and the carbon-combustion efficiency was similar to that obtained with No. 6 fuel oil and coal-oil slurry. Nitrogen oxide emissions were significantly lower than those obtained when firing coal-oil slurry, and the SO/sub 2/ emissions were about 50 percent lower. Some fouling of the small ports in the burner nozzle was experienced due to the accumulation of small fibers passing through the filter screen.
Report Numbers
PERC/RI-77/9
Other Subject(s)
Collection
NTIS collection.
Note
OSTI Identifier 7221174
Research organization: Energy Research and Development Administration, Pittsburgh, PA (USA). Pittsburgh Energy Research Center.
View MARC record | catkey: 45335762