Strengthen flame stability during the furnace`s load decrease

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:549555

Zhiguo, Zhang; Xuexin, Sun; Fujin, Li; Jihua, Qiu; Gang, Chen ^[1]

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1. HuaZhong Univ. of Science and Technology, Wuhan, Hubei (China)

This paper presents the result of the study of the coal combustion characteristic and flame stability during the load decrease of PCFF (corner burner arrangement). Considering the relation between flame stability and furnace load during the furnace load change, some method must be used to strengthen the pulverized coal ignition and combustion for the furnace to maintain the flame stability especially for the furnace which fires low rank anthracite. Experimental results show that when the furnace load decreased, the temperature distribution in furnace decreased and the flame stability in furnace had changed because of the load changing. This paper also introduces a new pulverized coal burner: Bluff-body with cavity burner. According to the result of application of this burner, this kind of pulverized coal burner can improve the coal ignition and combustion efficiency. Especially for low load operation of furnace the bluff-body with cavity burner has demonstrated its ability in strengthening coal ignition and improving the flame stability for furnace operation. Experimental results show that using bluff-body with cavity burner, the lowest load for furnace fired bituminous is 40% MCR and 50% MCr for low rank anthracite (V{sup r} < 12%, A{sup f} > 45%). This burner has simple structure and is very easy to set up for furnace.

• OSTI ID: 549555
• Report Number(s): CONF-960954--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ANTHRACITE
BITUMINOUS COAL
BURNERS
COAL
COMBUSTION CONTROL
DESIGN
FLAMES
FURNACES
LOAD MANAGEMENT
PULVERIZED FUELS
STABILITY