Method and apparatus for efficiently controlling the incineration of combustible materials in a multiple hearth furnace system
US4459923A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 1983 |
| Grant date | Jul 17, 1984 |
| Priority date | — |
| Expiry date | Feb 18, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2237/16
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
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: PA0 scanning the temperature of two or more combustion hearths to determine which is the hottest hearth; PA0 controlling the temperature of the thus-determined hottest hearth at a predetermined temperature set point value; PA0 controlling the oxygen content of the system exhaust gas at least as high as the predetermined set point value; and PA0 maintaining the system exhaust temperature at least as high as the predetermined set point value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.