Patent US4214880A successfully refreshed from Google Patents.
US4214880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid seal system, e.g. for a flare stack
Assignee: Individual
•
Filing: 1978-05-02
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Granted: 1980-07-29
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Expires: 1998-05-02
Abstract
Abstract A liquid seal for isolating a source of unwanted gas from an outlet from where it is to be discharged. The seal is particularly for use at the bottom of a flare or vent stack and comprises a cylindrical housing comprising two liquid seals, one above the other. If the seals are arranged in parallel a high rate of flow of gas through the system is permitted without increasing the diameter of the cylinder beyond an unacceptable dimension. Alternatively, if the seals are arranged in series a greatly improved sealing action is obtained.
Inventors
- 👤 Hendrik A. Kamphorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:28
CPC Classifications
F; F16; F16K; F16K13/00; F16K13/08; F16K13/10; F16J; F16J15/00; F16J15/16; F16J15/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
191 words
A stack for venting and firing a combustible gas comprising a chimney portion and a columnar base portion, the base portion being formed as a hollow supporting structure for the chimney portion, with an interior columnar chamber, there being located in the columnar chamber a liquid sealing system comprising at least two liquid sealing devices utilizing separate respective bodies of liquid, disposed one above the other and each having a surface extending substantially across the whole width of the chamber, means for directing incoming gas through the sealing devices into the chimney portion, a common inlet, the inlet communicating with inner and outer co-axial ducts centrally located along the axis of the chamber, the outer duct leading to the first sealing device closest to the inlet and the inner duct leading centrally through the first sealing device to the second sealing device, the first sealing device being above the second, the outer co-axial duct leading vertically into the liquid of the first sealing device and the inner co-axial duct leading from a level above the liquid level of the first sealing device directly into the liquid of the second sealing device.
Claim 2
Dependent Claim
191 words
A stack for venting and firing a combustible gas comprising a chimney portion and a columnar base portion, the base portion being formed as a hollow supporting structure for the chimney portion, with an interior columnar chamber, there being located in the columnar chamber a liquid sealing system comprising at least two liquid sealing devices utilizing separate respective bodies of liquid, disposed one above the other and each having a surface extending substantially across the whole width of the chamber, means for directing incoming gas through the sealing devices into the chimney portion, a common inlet, the inlet communicating with inner and outer co-axial ducts centrally located along the axis of the chamber, the outer duct leading to the first sealing device closest to the inlet and the inner duct leading centrally through the first sealing device to the second sealing device, the first sealing device being above the second, the outer co-axial duct leading vertically into the liquid of the first sealing device and the inner co-axial duct leading from a level above the liquid level of the first sealing device directly into the liquid of the second sealing device.
Claim 3
Dependent Claim
15 words
A stack in accordance with claim 1 wherein the sealing devices are arranged in parallel.
Claim 4
Dependent Claim
15 words
A stack in accordance with claim 1 wherein the sealing devices are arranged in series.
Claim 5
Dependent Claim
30 words
A stack in accordance with claim 1 wherein the chamber is cylindrical and wherein paths for the gas extend from each sealing device into the chimney co-axially with the chamber.
Claim 6
Dependent Claim
40 words
A stack in accordance with claim 1 wherein the sealing devices are arranged in parallel and wherein a path for the gas extends from one sealing device upwardly towards the chimney between the cylindrical housing and the other sealing device.
Claim 7
Dependent Claim
29 words
A stack in accordance with claim 1 which includes a separating device upstream of at least one of the sealing devices for removing liquid particles entrained with the gas.
Claim 8
Dependent Claim
24 words
A stack in accordance with claim 1 which includes a separating device downstream of the sealing device for removing liquid entrained with the gas.
Claim 9
Dependent Claim
18 words
A stack in accordance with claim 1 including a centrifugal separator for removing liquid entrained with the gas.
Claim 10
Dependent Claim
27 words
A stack in accordance with claim 1 wherein each said device has its own inlet so that gaseous products from different sources pass through respective sealing devices.
Claim 11
Dependent Claim
58 words
A stack in accordance with claim 1 wherein the inlet leads to a centrifugal separator in the bottom region of the chamber, the said co-axial ducts leading upwardly out of the chamber, each of the inner and outer co-axial ducts communicating with a cup-shaped member having a bottom edge immersed in the liquid of a said sealing device.
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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) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |