Combustion Characteristics and NO_xEmissions of Two Kinds of Swirl Burners in a 300-MW_eWall-Fired Pulverized-Coal Utility Boiler

Measurement of gas species, temperatures, char burnout, and wall heat fluxes in a 200-MWe lignite-fired boiler at different loads

“…where x i is the weight percentage of the species of interest, x a is the ash weight percentage, and the subscripts k and x refer to different contents in the input coal and char sample, respectively [7,9].…”

“…Costa et al measured local mean concentrations of O 2 , CO, CO 2 , and NO x gas, gas temperatures, and char burnout at several ports on a 300-MW e , front-wall-fired, pulverized coal utility boiler [6][7][8]. Li et al measured for the same parameters in a 300-MW e wall-fired pulverized coal utility boiler [9]. Experiments have been performed using pulverized coal, tangentially fired, and wallfired boilers [10][11][12][13][14][15][16][17][18].…”

“…We use the results of the cold experiments to analyze the hot-state situation (further analysis await numerical simulation). The data obtained by Li et al from a centrally fuel rich burner is compared with our data on the concentrations of O 2 , CO, NO x , gas temperatures, and char burnout obtained by monitoring the ports of a double swirl flow pulverized coal burner [9].…”

Combined control of secondary air flaring angle of burner and air distribution for opposed-firing coal combustion

“…Wall fired boiler is widely used because of its flame organization independence, unlimited boiler shape and little gas temperature deviation in the horizontal flue gas pass. However, flame stability at low load and NO x emissions are still the main concerns in design and operation [11]. Novel swirl coal burner technology presents an efficient method to solve these problems by enhancing ignition and staged combustion.…”

“…Jing [15] operated experimental study on outer secondary air vane angle. Li [11] proposed a new low-NO x burner technology with centrally fuel rich coal combustion burner. These literatures focused on the burner structure modified and innovations.…”