Industrial pulverized coal low NO{sub x} burner. Phase 1
The objective of Phase 1 of this program is to develop a novel low NO{sub x} pulverized coal burner, which offers near-term commercialization potential, uses preheated combustion air of up to 1000{degree}F, and which can be applied to high-temperature industrial heating furnaces, chemical process furnaces, fired heaters, and boilers. In the low NO{sub x} coal burner concept, the flue gas is recycled to the burner by jet pump action provided by the momentum of the primary air flow. The recycled flue gas is used to convey the pulverized coal to the jet pump where mixing with the primary air takes place. Ignition occurs downstream of the jet mixing section. The recycled flue gas is at high temperature. When the pulverized coal is entrained, it is heated by conduction from the flue gas. The coal is pyrolyzed to a large extent before being mixed with the primary air. These pyrolysis products are the source of energy for the downstream flame. In this process, the fuel nitrogen associated with pyrolysis products can be converted to molecular nitrogen in the pyrolysis flame if the oxygen is held to substoichiometric concentrations based upon the burning species (pyrolysis products and some char). Pyrolysis products combustion is believed to be the primary source of NO{sub x} emissions in coal combustors. Progress is described.
- Research Organization:
- Little (Arthur D.), Inc., Cambridge, MA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-92PC92151
- OSTI ID:
- 10177913
- Report Number(s):
- DOE/PC/92151-T2; ON: DE93040619
- Resource Relation:
- Other Information: PBD: 23 Feb 1993
- Country of Publication:
- United States
- Language:
- English
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