US3589342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus
Assignee: Coal Industry Patents Ltd
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Filing: 1969-05-05
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Granted: 1971-06-29
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Expires: 1989-05-05
Abstract
Abstract The invention provides both a method and apparatus for heating a liquid. The apparatus incorporates a furnace chamber in which fuel, such as particulate coal, is burnt in a fluidized bed. The heat from the bed is transferred to the liquid contained in a jacket surrounding the furnace by transfer through the furnace casing, by transfer through conduits immersed in the bed and connected with the jacket through which conduits immersed in the bed and connected with the jacket through which conduits the liquid passes, and by transfer from exhaust gases of combustion fed through smoke tubes passing through the jacket. The liquid vapor produced by heating is drawn off the apparatus for use in further apparatus such as steam turbines.
Inventors
- 👤 Michael H Barker
- 👤 Stephen J Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:26
CPC Classifications
F; F22; F22B; F22B9/00; F22B9/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
156 words
Apparatus for heating a liquid comprising a furnace chamber having a lower part adapted, in use, to contain a bed of particulate material, a first inlet for admitting a gas to said part to fluidize the bed, and an inlet for admitting fuel to said part, a jacket surrounding the furnace chamber, the jacket being adapted to contain a liquid to be heated, tubes for the passage of liquid extending from one location in the jacket through the lower part of the furnace chamber to another location in the jacket so that liquid in the jacket can flow through the tubes and receive heat from the lower part of the furnace chamber, exhaust means for removing the gases of combustion from the furnace chamber including exhaust tubes connected to an upper exhaust portion to receive gases of combustion, the exhaust tubes extending outside the furnace chamber into the jacket and outlet means for the liquid vapors.
Claim 2
Dependent Claim
156 words
Apparatus for heating a liquid comprising a furnace chamber having a lower part adapted, in use, to contain a bed of particulate material, a first inlet for admitting a gas to said part to fluidize the bed, and an inlet for admitting fuel to said part, a jacket surrounding the furnace chamber, the jacket being adapted to contain a liquid to be heated, tubes for the passage of liquid extending from one location in the jacket through the lower part of the furnace chamber to another location in the jacket so that liquid in the jacket can flow through the tubes and receive heat from the lower part of the furnace chamber, exhaust means for removing the gases of combustion from the furnace chamber including exhaust tubes connected to an upper exhaust portion to receive gases of combustion, the exhaust tubes extending outside the furnace chamber into the jacket and outlet means for the liquid vapors.
Claim 3
Dependent Claim
34 words
Apparatus according to claim 1 wherein at least some of the tube lengths within the furnace chamber and/or issuing from the chamber are linear and are inclined at an acute angle to the horizontal.
Claim 4
Dependent Claim
16 words
Apparatus according to claim 2, wherein the angle of inclination is between 5* and 20* .
Claim 5
Dependent Claim
17 words
Apparatus according to claim 2 wherein the tube lengths within the furnace chamber are of approximately U-shape.
Claim 6
Dependent Claim
33 words
Apparatus according to claim 1 wherein the furnace chamber in contained within an outer casing adapted to contain the liquid to be heated at a level above the top of the furnace chamber.
Claim 7
Dependent Claim
31 words
Apparatus according to claim 1, including a preheating member adjacent the first inlet, the preheating member being connected to the exhaust tubes in order to enable fluidizing gas to be preheated.
Claim 8
Dependent Claim
22 words
Apparatus according to claim 1 comprising a discharge outlet positioned within the furnace chamber for maintaining the level to the bed constant.
Claim 9
Dependent Claim
167 words
In apparatus for heating a liquid comprising a furnace chamber having a lower part containing a bed of particulate material and fuel in a fluidized and combusting state, a first inlet admitting a gas to the bed, and inlet admitting fuel to the bed; and an upper part receiving the gases of combustion from the bed, exhaust tubes connected with the said upper part and conducting the gases of combustion away from the upper part; a casing surrounding the furnace chamber and forming a jacket between the furnace chamber and the casing, liquid in the jacket completely covering the furnace chamber, tubes in the furnace chamber passing through the fluidized bed, the liquid passing through the tubes and receiving heat from the bed, the tubes having a linear part inclined to the horizontal; the exhaust tubes passing through the liquid and the gases in the tubes heating the liquid, and an outlet in the casing through which vapors of the liquid produced by heating are drawn off.
Claim 10
Dependent Claim
167 words
In apparatus for heating a liquid comprising a furnace chamber having a lower part containing a bed of particulate material and fuel in a fluidized and combusting state, a first inlet admitting a gas to the bed, and inlet admitting fuel to the bed; and an upper part receiving the gases of combustion from the bed, exhaust tubes connected with the said upper part and conducting the gases of combustion away from the upper part; a casing surrounding the furnace chamber and forming a jacket between the furnace chamber and the casing, liquid in the jacket completely covering the furnace chamber, tubes in the furnace chamber passing through the fluidized bed, the liquid passing through the tubes and receiving heat from the bed, the tubes having a linear part inclined to the horizontal; the exhaust tubes passing through the liquid and the gases in the tubes heating the liquid, and an outlet in the casing through which vapors of the liquid produced by heating are drawn off.
Claim 11
Independent Claim
113 words
A method of heating a liquid by heat exchange with a fluidized bed of particulate material comprising the steps of introducing an upward flow of gas through the bed whereby the bed is maintained in a fluidized state, introducing finely divided fuel into the fluidized bed, burNing the fuel in a fluidized state within the bed, arranging the liquid in a space located around the bed, causing the liquid to flow from one location in said space through said bed to a different location in said space whereby the liquid receives heat from the bed and conducting the exhausted gases through the liquid in said space in heat exchange relationship with the liquid.
Claim 12
Independent Claim
113 words
A method of heating a liquid by heat exchange with a fluidized bed of particulate material comprising the steps of introducing an upward flow of gas through the bed whereby the bed is maintained in a fluidized state, introducing finely divided fuel into the fluidized bed, burNing the fuel in a fluidized state within the bed, arranging the liquid in a space located around the bed, causing the liquid to flow from one location in said space through said bed to a different location in said space whereby the liquid receives heat from the bed and conducting the exhausted gases through the liquid in said space in heat exchange relationship with the liquid.
Claim 13
Dependent Claim
27 words
A method according to claim 9, wherein the path of the liquid through the bed includes a linear portion inclined to an acute angle to the horizontal.
Claim 14
Dependent Claim
16 words
A method according to claim 10, wherein the acute angle is between 5* and 20* .
Claim 15
Dependent Claim
26 words
A method according to claim 9, wherein the bed and the region above the bed containing the gases of combustion are completely surrounded by the liquid.
References Cited (Backward Citations)
US2997286A
Cited
US3387590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |