Pulverized coal burner

Patent · Mon Oct 31 23:00:00 EST 1983

OSTI ID:5215544

Izuha, A; Fujii, K; Kurata, C; Shibayama, Y; Shinano, T

A pulverized coal burner is disclosed including a primary throat having at its forward end a swirler for feeding pulverized coal and primary air in vortical flow, a secondary throat located outside the primary throat for supplying secondary air and a burner throat located outside the secondary throat for supplying tertiary air, the secondary and burner throats being located concentrically with the primary throat having at its forward end a flame sustaining plate diverging outwardly to cause the secondary and tertiary air to flow away from the primary throat along the inner surface of the outwardly diverging forward end portion of the burner throat, to thereby avoid mixing of the secondary and tertiary air with the pulverized coal air in a primary flame region in which the pulverized coal burns slowly and produces NO /SUB x/ in reduced amount. The secondary throat can be moved to adjust the spacing between its forward end and the flame sustaining plate, to adjust the amount of the secondary air and the flow of the secondary and tertiary air. Unburned components of pulverized coal from the primary flame region can be mixed with the secondary and tertiary air in a secondary flame region downstream of the primary flame region and burned at a slow speed at low temperature to reduce the amounts of NO /SUB x/ produced.

• Assignee: Kawasaki Jukogyo Kabushiki Kaisha (Japan)
• Patent Number(s): US 4412810
• OSTI ID: 5215544
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
AIR FLOW
BURNERS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
COMMINUTION
CONTROL
DESIGN
ENERGY SOURCES
FLUID FLOW
FOSSIL FUELS
FUELS
GAS FLOW
MATERIALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
THERMOCHEMICAL PROCESSES
VORTEX FLOW