US4088180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerator flow control
Assignee: PPG Industries Inc
•
Filing: 1977-02-17
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Granted: 1978-05-09
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Expires: 1997-02-17
Abstract
Abstract In a regenerative furnace of the type used for melting glass, localized overheating of the regenerator packing is minimized, heating of the regenerator packing is made more uniform, and regenerator efficiency is improved by employing a movable baffle in the space beneath the regenerator packing and/or by a baffle in the plenum above the packing.
Inventors
- 👤 Yih-Wan Tsai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:33
CPC Classifications
F; F27; F27B; F27B3/00; F27B3/10; F27B3/26; C; C03; C03B; C03B5/00; C03B5/16; C03B5/235; C03B5/237; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/03; Y10S165/032; Y10S165/034
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
174 words
A method of operating a regenerator of the type which includes a gas-pervious bed of refractory material, an air distributing space communicating with said bed along its length, and a flue communicating with said air distributing space at one end thereof; wherein during an exhaust cycle, hot exhaust gases are passed through the refractory bed thereby heating the refractory material, into the air distributing space, and out of the flue; and during a firing cycle, air is passed from the flue, to the air distributing space, and through the refractory bed to extract the heat stored in the refractory material; the improvement comprising: positioning a baffle in the air distributing space during the firing cycle so as to divert air through a portion of the refractory bed which is subject to localized overheating in the exhaust cycle, so as to preferentially cool that portion; and removing the baffle from the air-diverting position during the exhaust cycle so as to permit free flow of exhaust gases through the air distributing space and out the flue.
Claim 2
Independent Claim
174 words
A method of operating a regenerator of the type which includes a gas-pervious bed of refractory material, an air distributing space communicating with said bed along its length, and a flue communicating with said air distributing space at one end thereof; wherein during an exhaust cycle, hot exhaust gases are passed through the refractory bed thereby heating the refractory material, into the air distributing space, and out of the flue; and during a firing cycle, air is passed from the flue, to the air distributing space, and through the refractory bed to extract the heat stored in the refractory material; the improvement comprising: positioning a baffle in the air distributing space during the firing cycle so as to divert air through a portion of the refractory bed which is subject to localized overheating in the exhaust cycle, so as to preferentially cool that portion; and removing the baffle from the air-diverting position during the exhaust cycle so as to permit free flow of exhaust gases through the air distributing space and out the flue.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein said baffle is deployed so as to divert air into the first one-third of the refractory bed from the flue end.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein said baffle is removed from the air-diverting position by rotating the baffle about an axis.
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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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |