Flame ionization control of a partially premixed gas burner with regulated secondary air

Patent · Tue May 13 04:00:00 EDT 1986

OSTI ID:5627354

Torborg, R H

A gas burning furnace is described which consists of: a gas burner mounted in a combustion chamber, the combustion chamber having an exhaust outlet adapted to be connected to a flue, a gas inlet to the burner connected to a gas control adapted to receive gas from a gas source, a primary air inlet of the burner connected to an air supply means supplying primary air to the burner to mix with the gas received by the burner to provide a premixed gas to air ratio for burning of the gas, ignition means for igniting the premixed gas and air mixture, control means responsive to an ionization current of the burner flame, the ionization current produced by a sensor means, wherein the sensor means has a characteristic maximum value for the ionization current at a premixed gas and air mixture of the burner where incomplete combustion due to a shortage of primary air exists, the control means being connected to the gas control to control the gas and the ratio of gas to primary air supply to maintain the ionization current at the maximum value, and a secondary air inlet to the combustion chamber connected to the air supply means, the secondary air inlet being sized with respect to the primary air inlet to proportionally maintain an excess air in the combustion chamber for complete combustion of the gas in the combustion chamber.

• Assignee: Honeywell, Inc., Minneapolis, MN
• Patent Number(s): US 4588372
• OSTI ID: 5627354
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
AIR FLOW
BURNERS
COMBUSTION CHAMBERS
COMBUSTION CONTROL
CONTROL
CONTROL SYSTEMS
DISPERSIONS
EXHAUST SYSTEMS
FLAME PROPAGATION
FLAMES
FLUE GAS
FLUID FLOW
FUEL-AIR RATIO
FURNACES
GAS BURNERS
GAS FLOW
GASEOUS WASTES
IGNITION
IONIZATION
MIXTURES
WASTES