Back to results
US 4,250,816 AGranted
Particulate solid fuel combustion system
AssigneePullman Incorporated, Pullman Swindell Division
InventorsJohn S. Angevine, Scott W. Frame, Stephen B. Yacura
Life of this patent
Estimating the term…
Abstract
The application discloses a particulate solid fuel combustion system for kilns and the like. A particulate solid fuel such as powdered coal, is supplied to a fluidized bed conveyor. Selected quantities of coal are withdrawn to air entrainment devices where the coal is entrained in a jet of a gas and delivered to a burner. The firing rate is controlled responsive to requirements of the kiln.
Claims8
A particulate solid fuel combustion system comprising:
- (a) fluidized bed conveyor means having operably connected thereto a source of air for fluidizing the fuel within said conveyor,
- (b) a controlled delivery system for delivery of said fuel to said conveyor,
- (c) a plurality of duct means operably connected to said conveyor, each said duct means having plenum means at the end opposite the connection to said conveyor,
- (d) primary air duct means operably connected to each said plenum to cause said fuel to enter said plenum from said conveyor,
- (e) valve means operably connected to said primary air duct means for controlling the flow of primary air through said conduit means and into said plenum,
- (f) fuel delivery means operably connected to said plenum and to the burners of a kiln through which said fuel is delivered by said air from said plenum to said burners;
- and
- (g) heat sensing means within the firing zone of said kiln said heat sensing means operably connected to said valve means within said primary air conduit means to regulate said control valve means with relation to the temperature of said kiln.
5 more elements
A powdered fossil fuel combustion system comprising:
- (a) fluidized bed conveyor means having operably connected thereto a source of warm air for fluidizing the fuel within said conveyor and reducing the moisture content thereof,
- (b) a gravity controlled chute delivery system operably connected to said conveyor for delivery of said fuel to said conveyor at a constant predetermined rate,
- (c) a plurality of duct means operably connected to said conveyor, said duct means having plenum means at the end opposite the connection to said conveyor,
- (d) a primary air conduit means operably connected to said plenum means to cause said fuel to enter said plenum from said conveyor,
- (e) secondary air conduit means operably connected to said duct means to cause said fuel to enter said duct means from said conveyor,
- (f) valve means operably connected to said primary air conduit means and said secondary air conduit means for controlling the flow of primary and secondary air conduit means into said plenum and said duct,
- (g) fuel delivery means operably connected to said plenum means and the burners of a kiln through which said fuel is delivered by said primary air and secondary air from said plenum to said burners to fire said kiln;
- and
- (h) a thermocouple operably connected to first valve means within said primary air conduit means and a second thermocouple operably connected to second valve means within said secondary air conduit means to regulate said valve means with relation to the temperature variations within said kiln temperature means.
6 more elements
Dependencies are inferred from the claim text.