Solid fuel pulverizing and burning system and method and pulverizer and burner therefor
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 mixing of primary air and pulverized solid fuel, and a controlled secondary air supply. A movable valve element, preferably in the form of a double-taperended 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.
- Assignee:
- T.A.S. Inc.
- Patent Number(s):
- US 4531461
- OSTI ID:
- 6456720
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
BURNERS
COAL FINES
COAL PREPARATION
COMBUSTION CONTROL
COMMINUTION
CONTROL
CONTROL EQUIPMENT
DESIGN
DIFFUSERS
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FUEL SYSTEMS
FUEL-AIR RATIO
GRINDING MACHINES
MACHINE TOOLS
NOZZLES
PARTICLE SIZE
PULVERIZERS
SIZE
TOOLS
TURBULENT FLOW
VALVES