US3855788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and a method of operating power recovery equipment
Assignee: Elliott Turbomachinery Co Inc
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Filing: 1973-09-27
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Granted: 1974-12-24
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Expires: 1993-09-27
Abstract
Abstract Power recovery apparatus utilizing energy present in the flue gas of a catalyst regenerator of the kind employed in fractional distillation plants wherein the conduit connecting the regenerator and a power recovery turbine is provided with means for rapidly venting the section of a main supply conduit immediately upstream of the turbine to rapidly decrease power recovery turbine output.
Inventors
- 👤 L Damratowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:36
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; F; F02; F02C; F02C6/00; F02C6/04; F02C6/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
206 words
The method of regulating the operation of a power recovery turbine utilizing as a source of energy substantially particlefree gaseous products of combustion formed in a catalyst regenerator serving a fluid catalytic cracking plant which comprises the steps of: a. directing the flow of gaseous products of combustion from the regenerator to the inlet of the turbine through a main conduit having a relatively large diameter to accommodate the volume of gaseous flow emanating from the regenerator, b. providing a path of flow through a first by-pass conduit arranged in parallel with a portion of the main conduit whereby a variable volume of gaseous flow may be directed around the turbine, c. varying passage of gaseous products in the two conduits through actuation of flow control valves disposed therein, d. providing a path of flow through a second by-pass conduit communicating with the main conduit between the valve regulating flow therein and the inlet of the turbine to also direct gas around the turbine, and e. regulating the flow of gas in the by-pass conduits, and varying the regulating of the gas flow in the by-pass conduits such that flow in said second by-pass conduit may occur more rapidly than flow in said first by-pass conduit.
Claim 2
Independent Claim
206 words
The method of regulating the operation of a power recovery turbine utilizing as a source of energy substantially particlefree gaseous products of combustion formed in a catalyst regenerator serving a fluid catalytic cracking plant which comprises the steps of: a. directing the flow of gaseous products of combustion from the regenerator to the inlet of the turbine through a main conduit having a relatively large diameter to accommodate the volume of gaseous flow emanating from the regenerator, b. providing a path of flow through a first by-pass conduit arranged in parallel with a portion of the main conduit whereby a variable volume of gaseous flow may be directed around the turbine, c. varying passage of gaseous products in the two conduits through actuation of flow control valves disposed therein, d. providing a path of flow through a second by-pass conduit communicating with the main conduit between the valve regulating flow therein and the inlet of the turbine to also direct gas around the turbine, and e. regulating the flow of gas in the by-pass conduits, and varying the regulating of the gas flow in the by-pass conduits such that flow in said second by-pass conduit may occur more rapidly than flow in said first by-pass conduit.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |