Method and apparatus for efficiently controlling the incineration of combustible materials in a multiple hearth furnace system

Patent · Tue Jul 17 04:00:00 EDT 1984

OSTI ID:6519941

Lewis, F M

The present invention relates to a method and apparatus for controlling the operation of a multiple hearth furnace system for efficiently incinerating combustible materials, such as sludge in which the air of combustion is essentially all introduced at the bottom of the furnace to incinerate solid materials. This control involves the following essential steps: scanning the temperature of two or more combustion hearths to determine which is the hottest hearth; controlling the temperature of the thus-determined hottest hearth at a predetermined temperature set point value; controlling the oxygen content of the system exhaust gas at least as high as the predetermined set point value; and maintaining the system exhaust temperature at least as high as the predetermined set point value.

• Assignee: Sterling Drug, Inc.
• Patent Number(s): US 4459923
• OSTI ID: 6519941
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090400* -- Solid Waste & Wood Fuels-- (-1989)
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
AIR FLOW
BURNERS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION CONTROL
CONTROL
EFFICIENCY
EXHAUST GASES
FLUID FLOW
FLUIDS
FURNACES
GAS FLOW
GASEOUS WASTES
GASES
MEASURING INSTRUMENTS
METERS
OXIDATION
OXYGEN METERS
SLUDGES
TEMPERATURE CONTROL
THERMOCHEMICAL PROCESSES
THERMOMETERS
WASTES