US4516403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste heat recovery system for an internal combustion engine
Assignee: Mitsui Engineering and Shipbuilding Co Ltd
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Filing: 1984-04-20
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Granted: 1985-05-14
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Expires: 2004-04-20
Abstract
Abstract A feed water supply pump and a second control valve are provided in a water supply line system and a first control valve is provided at a second steam line. Further, a third control valve is provided at a hot water supply line. In this manner, the terminal temperature difference between the circulating water and the exhaust gas at the inlet and outlet of a preheating portion of an exhaust gas economizer are so controlled as to become equal. In addition, steam discharged from an exhaust outlet of a multi-pressure steam turbine is turned to water by means of a condenser and then, the condensed water is returned to a drain tank while withdrawing and collecting heat energy respectively in a lubricating oil cooler, a fresh water cooler and an air cooler of an internal combustion engine.
Inventors
- 👤 Yoshiharu Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:18
CPC Classifications
F; F02; F02G; F02G5/00; F02G5/02; F02G5/04; F01; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/10; F01K23/065; F01K23/101; F02B; F02B3/00; F02B3/06; F02G2260/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
338 words
In a waste heat recovery system comprising (a) an exhaust gas economizer having a preheating portion, an evaporating portion and superheating portion, (b) a multi-pressure steam turbine driving generator, (c) a steam separating drum and a first steam line supplying steam within the steam separating drum to a high pressure portion through the superheating portion of the exhaust gas economizer, said waste heat recovery system comprises: (c) a steam separating drum and a first steam line supplying steam within the steam separating drum to a high pressure inlet of said multi-pressure steam turbine through the superheating portion of the exhaust gas economizer; (d) a hot water flash turbine connected to said multi-pressure steam turbine; (e) a hot water supply line supplying hot water in the steam separating drum to said hot water flash turbine; (f) a second steam line supplying steam separated in said hot water flash turbine to a low pressure inlet of the multi-pressure steam turbine; (g) a first return line returning the hot water separated in said hot water flash turbine to a drain tank; (h) a second return line returning water condensed from the exhaust steam discharged from said multi-pressure steam turbine to said drain tank through a variety of coolers; (i) a water supply line supplying the liquid in said drain tank to the preheating portion of the exhaust gas economizer; (j) a first control valve provided at said second steam line and controlling a supply of the steam within the second steam line by sensing the temperature of circulating water at the inlet side of the preheating portion of the exhaust gas economizer; (k) a feed water supply pump provided at said water supply line; (l) a second control valve provided at said water supply line and controlling a supply of the water by sensing a water level in the drain tank; and (m) a third control valve provided at said hot water supply line and controlling a supply of the hot water by sensing the water level in the drain tank.
Claim 2
Dependent Claim
338 words
In a waste heat recovery system comprising (a) an exhaust gas economizer having a preheating portion, an evaporating portion and superheating portion, (b) a multi-pressure steam turbine driving generator, (c) a steam separating drum and a first steam line supplying steam within the steam separating drum to a high pressure portion through the superheating portion of the exhaust gas economizer, said waste heat recovery system comprises: (c) a steam separating drum and a first steam line supplying steam within the steam separating drum to a high pressure inlet of said multi-pressure steam turbine through the superheating portion of the exhaust gas economizer; (d) a hot water flash turbine connected to said multi-pressure steam turbine; (e) a hot water supply line supplying hot water in the steam separating drum to said hot water flash turbine; (f) a second steam line supplying steam separated in said hot water flash turbine to a low pressure inlet of the multi-pressure steam turbine; (g) a first return line returning the hot water separated in said hot water flash turbine to a drain tank; (h) a second return line returning water condensed from the exhaust steam discharged from said multi-pressure steam turbine to said drain tank through a variety of coolers; (i) a water supply line supplying the liquid in said drain tank to the preheating portion of the exhaust gas economizer; (j) a first control valve provided at said second steam line and controlling a supply of the steam within the second steam line by sensing the temperature of circulating water at the inlet side of the preheating portion of the exhaust gas economizer; (k) a feed water supply pump provided at said water supply line; (l) a second control valve provided at said water supply line and controlling a supply of the water by sensing a water level in the drain tank; and (m) a third control valve provided at said hot water supply line and controlling a supply of the hot water by sensing the water level in the drain tank.
Claim 3
Dependent Claim
38 words
A waste heat recovery system according to claim 1, wherein a flasher is provided at the first return line, said flasher communicating with the low pressure portion of the multi-pressure turbine by means of the stream supply line.
Claim 4
Dependent Claim
55 words
A waste heat recovery system according to claim 1, wherein a flasher is provided adjacent the multi-pressure turbine, said flasher communicating with the steam separation drum, a first low pressure inlet of the multi-pressure steam turbine and the drain tank by means respectively of the first steam line, second steam line and first return line.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |