Pulverized solid fuel burner and method of firing pulverized fuel

Patent · Tue Dec 23 00:00:00 EST 1986

OSTI ID:7187963

Sayler, W H; White, J C

This patent describes a pulverized solid fuel burner adapted for attachment to a furnace or other heating structure, comprising means defining an ignition chamber, and an elongate firing conduit having one end adapted to connect with means for supplying a stream of primary air and pulverized solid fuel and having a fuel firing orifice at the other end for discharge of a stream of the pulverized fuel and primary air that passes through the firing conduit internally and from end-to-end thereof, the firing orifice being directed into the ignition chamber. A valve element is movably mounted relative to the firing orifice for adjustment closer thereto or farther therefrom as a primary air and fuel feed control valve, the conduit being relatively long and longitudinally imperforate so as to confine the longitudinally extensive flow of the primary air and fuel stream therethrough. A structural means is within the conduit and mutually spaced along the length thereof for imparting turbulence to the longitudinally extensive flow of primary air and fuel prior to its discharge from the conduit and its entering the ignition chamber. A means is included for introducing a controlled quantity of secondary air into the turbulent stream after its discharge through the firing orifice, the means being a conduit concentric with and surrounding the firing conduit and opening into the ignition chamber. The firing conduit is slidable longitudinally relative to the secondary air conduit and to the ignition chamber, so as to permit selective positioning of the firing orifice.

• Assignee: NOV; NOV-87-041381; EDB-87-043271
• Patent Number(s): US 4630554
• OSTI ID: 7187963
• Resource Relation: Patent File Date: Filed date 8 Mar 1985
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
42 ENGINEERING
BURNERS
COMBUSTION CONTROL
DESIGN
OPERATION
COAL FINES
COMBUSTION
AIR FLOW
FLAME PROPAGATION
FUEL-AIR RATIO
FURNACES
IGNITION SYSTEMS
ORIFICES
POSITIONING
PULVERIZED FUELS
TURBULENT FLOW
VALVES
CHEMICAL REACTIONS
CONTROL
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
GAS FLOW
OPENINGS
OXIDATION
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion
421000 - Engineering- Combustion Systems