24-10-2012, 03:36 PM
METHANE de-NOX (Registered) for Utility PC Boilers
ABSTRACT
The primary focus for the project continues to be on developing a PC PREHEAT system design suitable for use with
caking coals and readying the 100 MMBtu/h CBTF for testing with noncaking PRB coal. During the current quarter,
twenty-two pilot tests were conducted with Central Appalachian (CA) caking coal. The objective for these tests was to achieve
continuous operation of the pilot system at its design coal feed rate of 156 lb/h, without plugging or agglomeration in the
combustor. One combustor air distribution method tested achieved continuous operation at 110 lb/hr, and inspection of the
combustor afterward indicated that this method has potential to solve the caking problem. The NOx results from the pilot
caking coal runs indicate that even greater NOx reduction is possible with CA coal than with the PRB coal tested, to levels
near 100 ppmv or lower at 4-6% exit oxygen. It was therefore decided to conduct additional pilot tests of the air distribution
method to determine how to incorporate this into a workable CA combustor design. Based on current weather and manpower
restrictions at the site, this pilot testing is expected to be started in February. The design for the 100 MMBtu/h unit for PRB
testing in the CBTF was completed and fabrication and installation started during the quarter. While significant progress has
been made in the installation of the unit, weather and combustor fabrication delays are expected to move the start of large-scale
testing with PRB coal into February, which will push the project completion date beyond the current 3/30/04 end date. GTI
is in the process of developing a revised project schedule and estimated cost to complete.
ABSTRACT
The primary focus for the project continues to be on developing a PC PREHEAT system design suitable for use with
caking coals and readying the 100 MMBtu/h CBTF for testing with noncaking PRB coal. During the current quarter,
twenty-two pilot tests were conducted with Central Appalachian (CA) caking coal. The objective for these tests was to achieve
continuous operation of the pilot system at its design coal feed rate of 156 lb/h, without plugging or agglomeration in the
combustor. One combustor air distribution method tested achieved continuous operation at 110 lb/hr, and inspection of the
combustor afterward indicated that this method has potential to solve the caking problem. The NOx results from the pilot
caking coal runs indicate that even greater NOx reduction is possible with CA coal than with the PRB coal tested, to levels
near 100 ppmv or lower at 4-6% exit oxygen. It was therefore decided to conduct additional pilot tests of the air distribution
method to determine how to incorporate this into a workable CA combustor design. Based on current weather and manpower
restrictions at the site, this pilot testing is expected to be started in February. The design for the 100 MMBtu/h unit for PRB
testing in the CBTF was completed and fabrication and installation started during the quarter. While significant progress has
been made in the installation of the unit, weather and combustor fabrication delays are expected to move the start of large-scale
testing with PRB coal into February, which will push the project completion date beyond the current 3/30/04 end date. GTI
is in the process of developing a revised project schedule and estimated cost to complete.