Patent US2779781A successfully refreshed from Google Patents.
Patent US4250816A successfully refreshed from Google Patents.
US4250816A
Expired / Lapsed
US
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Particulate solid fuel combustion system
Assignee: Pullman Inc
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Filing: 1976-12-16
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Granted: 1981-02-17
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Expires: 1996-12-16
Abstract
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 Selected quantities of coal are withdrawn to air entrainment devices where the coal is entrained in a jet of a gas and delivered to a burner.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.
Inventors
- 👤 John S. Angevine
- 👤 Scott W. Frame
- 👤 Stephen B. Yacura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:23
CPC Classifications
F; F27; F27D; F27D99/00; F27D99/0001; F27D99/0005; F23; F23K; F23K3/00; F23K3/02; F27B; F27B9/00; F27B9/30; F27B9/36; F27B15/00; F27B9/14; F27B9/20; F27B9/24; F27B9/2476; F27B9/26; F27B9/262
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
188 words
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.
Claim 2
Dependent Claim
188 words
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.
Claim 3
Dependent Claim
20 words
The apparatus of claim 1 wherein said conveyor means is slanted 1 to 4 degrees with respect to the horizontal.
Claim 4
Dependent Claim
15 words
The apparatus of claim 2 wherein said valve means is activated by an electronic signal.
Claim 5
Dependent Claim
13 words
The apparatus of claim 3 wherein said heat sensing means is a thermocouple.
Claim 6
Dependent Claim
59 words
The apparatus of claim 3 wherein electric timer means is operably connected to said control valve means to isolate said valve means from said heat sensing means, said timer causing said control valve to periodically fully open and fully close to cause oscillation of the flame caused by combustion of said fuel across said firing zone of said kiln.
Claim 7
Dependent Claim
252 words
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.
Claim 8
Dependent Claim
252 words
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.
Claim 9
Dependent Claim
20 words
The apparatus of claim 6 wherein said conveyor means is slanted 1 to 4 degrees with respect to the horizontal.
Claim 10
Dependent Claim
62 words
The apparatus of claim 7 wherein electric timer means are operably connected to said first and second control valve means to isolate said valve means from said thermocouple means, said timer means causing said control valves to periodically fully open and fully close to cause oscillation of the flame caused by combustion of said fuel across said firing zone of said kiln.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |