Low NOX radiant tube burner and method

Patent · Tue Jan 31 04:00:00 EST 1989

OSTI ID:6043524

Finke, H P

A radiant tube and burner assembly is described comprising: (a) a radiant tube having a burner leg and an exhaust leg; (b) a plenum positioned at least in part normal to and between the burner leg and the exhaust leg for mixing combustion air with at least a restricted quantity of products of combustion from the exhaust leg and for directing the resultant mixture into the burner leg; (c) a jet pump positioned upstream of the plenum for directing high velocity combustion air through a nozzle and along a central longitudinal axis of the plenum and for aspirating at least a restricted quantity of the products of combustion; (d) a duct in registry with the plenum and the exhaust leg for directing at least a restricted quantity of the products of combustion to the plenum; (e) a restricted orifice associated with the duct and dimensioned in side in relation to the jet pup nozzle to control the amount of products of combustion aspirated to the plenum; (f) exhaust means associated with the exhaust leg or duct and upstream of the plenum for exhausting the quantity of products of combustion not aspirated by the jet pump; and (g) a fuel source directed into the burner leg for providing fuel to mix with the combustion air and products of combustion; whereby all air intake is vitiated during normal operated and the fuel, combustion air and products of combustion provide a low temperature, uniform flame for reducing NOX emissions and providing uniform radiation along the radiant tube.

• Assignee: Bloom Engineering Co., Inc., Pittsburgh, PA
• Patent Number(s): US 4800866
• OSTI ID: 6043524
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR FLOW
AIR POLLUTION ABATEMENT
BURNERS
CHALCOGENIDES
COMBUSTION CONTROL
COMBUSTION PRODUCTS
CONTROL
DESIGN
DUCTS
EMISSION
EXHAUST SYSTEMS
FLUID FLOW
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
GAS FLOW
GASEOUS WASTES
INTAKE STRUCTURES
MECHANICAL STRUCTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NOZZLES
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
PUMPS
WASTES