US3273520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for air temperature regulation
Assignee: Combustion Engineering Inc
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Filing: 1964-12-29
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Granted: 1966-09-20
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Expires: 1984-12-29
Abstract
No abstract record available.
Inventors
- 👤 Richard D Hottenstine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:35
CPC Classifications
F; F23; F23C; F23C99/00; F22; F22B; F22B21/00; F22B21/34; F23K; F23K1/00; F23K1/04; F23K3/00; F23K3/02; F23L; F23L15/00; F23L15/04; F23N; F23N1/00; F23N1/02; F23N1/025; F23C2700/00; F23C2700/06; F23C2700/066; F23K2203/00; F23K2203/006; F23N2221/00; F23N2221/08; F23N2225/00; F23N2225/08; F23N2237/00; F23N2237/02; F23N2237/20; F23N2239/00; F23N2239/02; F23N2241/00; F23N2241/10; Y; Y02; Y02E; Y02E20/00; Y02E20/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A PULVERIZED FUEL SYSTEM FOR A VAPOR GENERATOR HAVING A FURNACE, BURNERS FOR BURNING A PULVERIZED FUEL IN THE FURNACE, A GAS PASS FOR CONVEYING CONVECTION PRODUCTS FROM SAID FURNACE, A SECONDARY AIR HEATER LOCATED IN SAID GAS PASS, AND A MEANS FOR CONVEYING SECONDARY AIR THROUGH SAID SECONDARY AIR HEATER AND THENCE TO THE FURNACE TO SUPPORT COMBUSTION THEREIN COMPRISING: A PLURALITY OF PULVERIZERS; A PRIMARY AIR HEATER LOCATED IN SAID GAS PASS, SAID AIR HEATER BEING IN PARALLEL RELATION WITH SAID SECONDARY AIR HEATER WITH RESPECT TO GAS FLOW; MEANS FOR PASSING PRIMARY AIR THROUGH SAID PRIMARY AIR HEATER TO THE MILLS FOR FUEL DRYING AND THENCE TO THE BURNERS; MEANS FOR SUPPLYING TEMPERING AIR TO THE PULVERIZERS; MEANS FOR CONTROLLING SAID TEMPERATURE AIR FLOW IN RESPONSE TO THE TEMPERATURE LEAVING EACH PULVERIZER; MEANS FOR SELECTING THE PULVERIZER HAVING THE LOWEST TEMPERING AIR FLOW; MEANS FOR REGULATING THE GAS FLOW THROUGH THE PRIMARY AIR HEATER IN ACCORDANCE WITH THE TEMPERING AIR FLOW SUPPLIED TO THE SELECTED PULVERIZER, WHEREBY SAID TEMPERING AIR FLOW MAY BE MAINTAINED AT A MINIMUM VALUE.
Claim 2
Dependent Claim
181 words
A PULVERIZED FUEL SYSTEM FOR A VAPOR GENERATOR HAVING A FURNACE, BURNERS FOR BURNING A PULVERIZED FUEL IN THE FURNACE, A GAS PASS FOR CONVEYING CONVECTION PRODUCTS FROM SAID FURNACE, A SECONDARY AIR HEATER LOCATED IN SAID GAS PASS, AND A MEANS FOR CONVEYING SECONDARY AIR THROUGH SAID SECONDARY AIR HEATER AND THENCE TO THE FURNACE TO SUPPORT COMBUSTION THEREIN COMPRISING: A PLURALITY OF PULVERIZERS; A PRIMARY AIR HEATER LOCATED IN SAID GAS PASS, SAID AIR HEATER BEING IN PARALLEL RELATION WITH SAID SECONDARY AIR HEATER WITH RESPECT TO GAS FLOW; MEANS FOR PASSING PRIMARY AIR THROUGH SAID PRIMARY AIR HEATER TO THE MILLS FOR FUEL DRYING AND THENCE TO THE BURNERS; MEANS FOR SUPPLYING TEMPERING AIR TO THE PULVERIZERS; MEANS FOR CONTROLLING SAID TEMPERATURE AIR FLOW IN RESPONSE TO THE TEMPERATURE LEAVING EACH PULVERIZER; MEANS FOR SELECTING THE PULVERIZER HAVING THE LOWEST TEMPERING AIR FLOW; MEANS FOR REGULATING THE GAS FLOW THROUGH THE PRIMARY AIR HEATER IN ACCORDANCE WITH THE TEMPERING AIR FLOW SUPPLIED TO THE SELECTED PULVERIZER, WHEREBY SAID TEMPERING AIR FLOW MAY BE MAINTAINED AT A MINIMUM VALUE.
References Cited (Backward Citations)
US3117538A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |