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BENCH-SCALE STUDIES TO IDENTIFY PROCESS PARAMETERS CONTROLLING REBURNING WITH PULVERIZED COAL
Citation:
Pershing, D., M. Heap, AND W. Seeker. BENCH-SCALE STUDIES TO IDENTIFY PROCESS PARAMETERS CONTROLLING REBURNING WITH PULVERIZED COAL. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/7-89/005 (NTIS PB89-200810), 1989.
Impact/Purpose:
Information.
Description:
The report addresses the evaluation of a technology which is a combination of two technologies used to control the atmospheric emission of NOx by stationary sources: (1) combustion modification (controls flame temperature and maximizes fuel-rich residence time to minimize NOx formation); and (2) flue gas cleaning (uses a reducing agent with or without a catalyst to remove NOx from combustion products). The combined technology uses fuel as a reducing agent to remove NOx. The process (referred to as in- furnace NOx reduction, reburning, and staged fuel injection) can be applied to many types of combustion systems. In fact, reburning is the process which allows the "in-furnace NOx reduction" to take place. Reburning involves two processes: (1) NO reduction (reburning fuel is added to the combustion products of the main combustion zone, which operates fuel lean, to produce a fuel-rich mixture, products of which are referred to as total fixed nitrogen); and (2) TFN oxidation (air is added to produce overall fuel-lean conditions, with the NH3, HCN, NO, and char nitrogen converted to either N2 or NO and fuel oxidation completed).