Solid fuel pulverizing and burning system and method and pulverizer and burner therefor
US4531461A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1984 |
| Grant date | Jul 30, 1985 |
| Priority date | — |
| Expiry date | Mar 12, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23K2201/10
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A system for pulverizing and burning solid fuel, such as coal or other fossil fuel, characterized by a possible turndown ratio of up to at least fifteen to one, includes a unique pulverizer capable of both impact and autogenous pulverizing of the fuel so that about 80% will be no more than 40 microns in size, and a unique burner which includes a valved firing nozzle having a firing conduit with firing orifice and internal turbulating means for a mixture of primary air and pulverized solid fuel, and a controlled secondary air supply. A movable valve element, preferably in the form of a double-taper-ended diffuser positioned downstream from the firing orifice, controls outflow of a turbulent stream of the mixed primary air and fuel from the firing orifice into an ignition chamber and controls flame shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.