US4319458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple pressure boiler with energy recovery system
Assignee: Individual
•
Filing: 1979-11-26
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Granted: 1982-03-16
•
Expires: 1999-11-26
Abstract
Abstract A multiple pressure boiler is disclosed having a plurality of boiler sections, each section operating at a successively lower temperature and lower pressure than the preceding section. The intake air for the firebox is heated by the flue gases, then superheated by the steam, to provide heated air for combustion, and the steam from the highest pressure section is superheated by the flue gases prior to its being used in a steam turbine or other steam engine. The fuel for the firebox is heated initially by being used as the coolant for a steam condenser, and is superheated by superheated steam from the heat exchanger. It is contemplated that a sufficient quantity of heat will be removed from the flue gases that the solids will precipitate out, and the gas will be substantially at ambient temperature. If heat must be discarded from the system, a water jacket is used in conjunction with a second condenser, the water jacket being cooled by a pond, water being fed from the bottom of a well in the pond, through the cooling jacket and to a sprinkler in the pond. The system is therefore an energy efficient system that will return clean, low temperature gas to the atmosphere.
Inventors
- 👤 James R. Berkley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:13
CPC Classifications
F; F22; F22B; F22B33/00; F22B33/14; F28; F28F; F28F1/00; F28F1/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
185 words
A multiple pressure boiler, comprising means for producing hot gases, a first boiler section including heat exchange means for receiving said hot gases and transferring heat from said hot gases to water in said first boiler section to raise the water in said first boiler section to a first temperature and cause said first boiler section to be at a first pressure, a second boiler section including heat exchange means for receiving said hot gases from said first boiler section and transferring heat from said hot gases to water in said second boiler section to raise the water in said second boiler section to a second temperature and cause said second boiler section to be at a second pressure, means for admitting water to said second boiler section for heating, means for removing heated water from said second boiler section and admitting said heated water to said first boiler section, and second temperature being above the boiling point of water and said second pressure being above atmospheric pressure, said first temperature being above said second temperature and said first pressure being above said second pressure.
Claim 2
Dependent Claim
185 words
A multiple pressure boiler, comprising means for producing hot gases, a first boiler section including heat exchange means for receiving said hot gases and transferring heat from said hot gases to water in said first boiler section to raise the water in said first boiler section to a first temperature and cause said first boiler section to be at a first pressure, a second boiler section including heat exchange means for receiving said hot gases from said first boiler section and transferring heat from said hot gases to water in said second boiler section to raise the water in said second boiler section to a second temperature and cause said second boiler section to be at a second pressure, means for admitting water to said second boiler section for heating, means for removing heated water from said second boiler section and admitting said heated water to said first boiler section, and second temperature being above the boiling point of water and said second pressure being above atmospheric pressure, said first temperature being above said second temperature and said first pressure being above said second pressure.
Claim 3
Dependent Claim
52 words
A multiple pressure boiler as claimed in claim 1, and including a plurality of heat exchangers located such that said hot gases pass through all of said plurality of heat exchangers, said plurality of heat exchangers being adapted to remove heat from said hot gases for use in said multiple pressure boiler.
Claim 4
Dependent Claim
32 words
A multiple pressure boiler as claimed in claim 2, at least one heat exchanger of said plurality of heat exchangers being a steam superheater for superheating steam from said first boiler section.
Claim 5
Dependent Claim
56 words
A multiple pressure boiler as claimed in claim 2, and including a solids separator for receiving said hot gases after said hot gases have passed through all said boiler sections, and all of said plurality of heat exchangers, fan means for moving said hot gases, and a filter for removing remaining solid material from said gases.
Claim 6
Dependent Claim
63 words
A multiple pressure boiler as claimed in claim 2, one heat exchanger of said plurality of heat exchangers constituting an intake air heat exchanger for receiving said hot gases after said hot gases pass through the second boiler section, said intake air heat exchanger being adapted to transfer heat from said hot gases to intake air for said means for producing hot gases.
Claim 7
Dependent Claim
44 words
A multiple pressure boiler as claimed in claim 5, and including pipe means for carrying intake air from said intake air heat exchanger to said means for producing hot gases, and including superheater means in said pipe means for additionally heating said intake air.
Claim 8
Dependent Claim
48 words
A multiple pressure boiler as claimed in claim 1, said means for producing hot gases including a firebox, a source of fuel for said firebox, and further including a means for heating said fuel, and means for superheating said fuel prior to placing said fuel in said firebox.
Claim 9
Dependent Claim
50 words
A multiple pressure boiler as claimed in claim 7, said means for superheating said fuel including a steam line receiving steam from said first boiler section, a third engine having a high pressure side connected to said steam line, and a low pressure side connected to said second boiler section.
Claim 10
Dependent Claim
76 words
A multiple pressure boiler as claimed in claim 7, and further including an engine for utilizing steam from said first boiler section, said engine including a low pressure side from which steam is exhausted, at least one condenser in communication with said low pressure side for receiving steam, said condenser including heat exchange means for cooling said steam, and means for passing said fuel through said condenser, said condenser constituting said means for heating said fuel.
Claim 11
Dependent Claim
129 words
A multiple pressure boiler as claimed in claim 9, and including a second engine for utilizing steam from said second boiler section, said second engine including a low pressure side from which steam is exhausted, a third boiler section including heat exchange means for receiving said hot gases from said second boiler section and transferring heat from said hot gases to water in said third boiler section to raise the water in said third boiler section to a third temperature below said second temperature and above the boiling point of water and cause said third boiler section to be at a third pressure below said second pressure and above atmospheric pressure, said low pressure side of said second engine being connected to exhaust steam into said third boiler section.
Claim 12
Dependent Claim
31 words
A multiple pressure boiler as claimed in claim 9, and further including a spout for conducting said fuel to said firebox, and a superheater in said spout for superheating said fuel.
Claim 13
Dependent Claim
54 words
A multiple pressure boiler as claimed in claim 11, said at least one condenser being a first condenser of a plurality of condensers, and further including a second condenser connected in series with said first condenser, said second condenser having an air section cooled by ambient air and a water section cooled by water.
Claim 14
Dependent Claim
56 words
A multiple pressure boiler as claimed in claim 12, and including a cooling jacket surrounding said second condenser, a cooling pond having a well in the bottom thereof, means for carrying water from said well to said cooling jacket, a sprinkler at said pond, and means for carrying water from said cooling jacket to said sprinkler.
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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) | 1985-03-15 | 1985-09-14 | 1986-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-15 | 1989-09-14 | 1990-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-15 | 1993-09-14 | 1994-03-16 | $7700.00 | Window Closed / Lapsed |