Pulverized fuel firing apparatus
US4669398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1985 |
| Grant date | Jun 2, 1987 |
| Priority date | — |
| Expiry date | Sep 20, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23D23/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A pulverized fuel firing apparatus comprises a first pulverized fuel injection compartment so constructed that the combined amount of primary air and secondary air to be consumed is less than the theoretical amount of air required for the combustion of the pulverized fuel to be fed as mixed with the primary air to a furnace, a second pulverized fuel injection compartment so constructed that the combined primary and secondary air amount is substantially equal to the theoretical air for the pulverized fuel to be fed together with the primary air, and a supplementary air compartment for injecting supplementary air into the furnace. The three compartments are arranged close to one another and control the NOx production upon combustion of the pulverized fuel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.