Open AccessAn experimental study of NO{sub x} recycle in the NOXSO flue gas cleanup process. Final report
Author(s) -
Qulan Zhou,
J.L. Haslbeck,
L.G. Neal
Publication year - 1993
Language(s) - English
Resource type - Reports
DOI - 10.2172/106651
Subject(s) - sorbent , flue gas , combustor , boiler (water heating) , pulverized coal fired boiler , waste management , slurry , combustion , pilot plant , coal , chemistry , environmental science , nuclear engineering , engineering , adsorption , environmental engineering , organic chemistry
NO{sub x} recycle represents one part of the NOXSO process. This process can remove 90% of NO{sub x} and SO{sub 2} simultaneously from flue gas by using a fluidized bed of sorbent. Spent sorbent is regenerated by treatment at high temperatures with a reducing gas. Adsorbed NO{sub x} is evolved on heating the sorbent to a regeneration temperature. The concentrated stream of NO{sub x} produced is returned to the boiler with the combustion air and reduced in the flame, which is called NO{sub x} recycle. The concept of NO{sub x} recycle has been experimentally evaluated at the US Department of Energy`s Pittsburgh Energy Technology Center (PETC). NO{sub x} destruction has been demonstrated on a 500 lb/hr pulverized coal combustor and a 1.7 MMBtu/hr tunnel furnace combustor firing both natural gas and coal-water slurry. The NO{sub x} recycle experimental study discussed in this report and performed on Babcock & Wilcox (B&W)`s six MMBtu/hr Small Boiler Simulator (SBS) is a pilot-scale test. The objective is to provide further fundamental understanding and necessary information for the NOXSO full-scale demonstration at Ohio Edison`s Niles Power Plant which uses the same type of cyclone burners. The experimental testing included injection of NO, NO{sub x} and different combinations of NO/NO{sub 2} with tile primary air (PA) and secondary air (SA) to the combustor. Results are consistent with earlier test data obtained on PETC`s facility and will be used for the design of the NOXSO commercial demonstration plant at Niles