US4375450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas purification system
Assignee: Osaka Gas Co Ltd
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Filing: 1981-04-15
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Granted: 1983-03-01
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Expires: 2001-04-15
Abstract
Abstract A gas purification system has: a first treatment apparatus, which purifies an untreated feed gas, containing toxic ingredients such as HCN gas, H 2 S gas and NH 3 gas, into a primary treated gas by causing the feed gas to contact with an alkaline absorbent liquid; an absorbent-liquid-resuscitation apparatus, which refreshes the absorbent liquid, after absorbing the toxic ingredients, by bubblingly introducing a resuscitation gas; and a second treatment apparatus, which further purifies the primary treated gas into a secondary treated gas by strippingly capturing any possible remnant NH 3 gas still present in the former. The resuscitation gas and the toxic-ingredient-absorbed absorbent liquid are forcibly converged by premix nozzles into combined gas/liquid jets as are injected into the absorbent-liquid-resuscitation apparatus. The primary treated gas and the gas coming from the resuscitation apparatus as its effluent waste are commingled and the resultant mixed gas is then fed into and treated within the second treatment apparatus.
Inventors
- 👤 Katsuo Katagiri
- 👤 Kiyotaka Shimazu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:17
CPC Classifications
B; B01; B01D; B01D53/00; C; C10; C10G; C10G1/00; C10G1/002
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
274 words
A system for purifying coal carbonization product gas containing NCN gas, H 2 S gas and NH 3 gas, comprising: first treatment means including a closed chamber which receives said coal carbonization product gas at a lower portion thereof, spray means mounted in an upper portion of said chamber to spray an alkaline absorbent liquid for contact with said coal carbonization product gas, absorbent liquid resuscitation means including a further closed chamber connected to said first treatment means through a pump and recirculation conduit means, nozzle means connected to said recirculation conduit means which feeds the absorbent liquid received from said first treatment means, together with an oxygen containing resuscitation gas, into said resuscitation means, a further recirculation circuit means connected to said resuscitation means and said spray means which feeds the absorbent liquid resuscitated in said resuscitation means to said spray means, and second treatment means connected to a top portion of said first treatment means through supply conduit means, said second treatment means being adapted to remove NH 3 gas remaining in the coal carbonization gas sent from said first treatment means, said nozzle means is in a form of a premix nozzle including therein a resuscitation gas passage joining an absorbent liquid passage, whereby the resuscitation gas is mixed into the absorbent liquid in fine bubbles prior to entry into said resuscitation means, and said resuscitation means is connected at a top portion to an upstream side of said second treatment means, whereby the resuscitation gas discharged from said resuscitation means is delivered to said second treatment means confluently with the coal carbonization product gas discharged from said first treatment means.
Claim 2
Independent Claim
274 words
A system for purifying coal carbonization product gas containing NCN gas, H 2 S gas and NH 3 gas, comprising: first treatment means including a closed chamber which receives said coal carbonization product gas at a lower portion thereof, spray means mounted in an upper portion of said chamber to spray an alkaline absorbent liquid for contact with said coal carbonization product gas, absorbent liquid resuscitation means including a further closed chamber connected to said first treatment means through a pump and recirculation conduit means, nozzle means connected to said recirculation conduit means which feeds the absorbent liquid received from said first treatment means, together with an oxygen containing resuscitation gas, into said resuscitation means, a further recirculation circuit means connected to said resuscitation means and said spray means which feeds the absorbent liquid resuscitated in said resuscitation means to said spray means, and second treatment means connected to a top portion of said first treatment means through supply conduit means, said second treatment means being adapted to remove NH 3 gas remaining in the coal carbonization gas sent from said first treatment means, said nozzle means is in a form of a premix nozzle including therein a resuscitation gas passage joining an absorbent liquid passage, whereby the resuscitation gas is mixed into the absorbent liquid in fine bubbles prior to entry into said resuscitation means, and said resuscitation means is connected at a top portion to an upstream side of said second treatment means, whereby the resuscitation gas discharged from said resuscitation means is delivered to said second treatment means confluently with the coal carbonization product gas discharged from said first treatment means.
Claim 3
Dependent Claim
66 words
The system of claim 1, wherein said closed chamber of the first treatment means and said closed chamber of the resuscitation means are separate entities, and a mixer is disposed upstream of said second treatment means to mix the coal carbonation product gas discharged from said closed chamber of the first treatment means and the resuscitation gas discharged from said closed chamber of the resuscitation means.
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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) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |