US3764259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas treating apparatus
Assignee: Siemens Industry Inc
•
Filing: 1972-06-16
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Granted: 1973-10-09
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Expires: 1992-06-16
Abstract
Abstract For use with a regenerative furnace, an apparatus for heating an incoming flow of combustion air while simultaneously cooling the waste gases being discharged from the furnace prior to directing the same to a gas cleaning device. The apparatus includes a regenerative heat exchanger (hereafter referred to as ''''regenerator'''') connected in series with a recuperative heat exchanger (hereafter called a ''''recuperator'''') between the furnace and the gas cleaning device. Incoming combustion air is directed initially through the recuperator and then through one of the chambers of the regenerator before being admitted to the furnace. Waste gases are passed through the other chamber of the regenerator and then through the recuperator before being directed to the gas cleaning device. The apparatus further includes a valve mechanism for simultaneously reversing the flow of waste gases and combustion air through the chambers of the regenerator.
Inventors
- 👤 F Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:08
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/235; C03B5/237; F; F23; F23M; F23M20/00; Y; Y02; Y02P; Y02P40/00; Y02P40/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
255 words
For use with a regenerative furnace, an apparatus for employing waste gases being discharged from the furnace to heat combustion air being introduced into the furnace, said apparatus comprising: a regenerator having first and second chambers, said chambers being connected respectively by first and second conduit means to opposite sides of the furnace; reversing valve means communicating with said first and second chambers and with third and fourth conduit means, said third conduit means leading from said reversing valve means to a gas cleaning device, the latter device in turn being connected to a chimney; a recuperator in said third conduit means between said reversing valve means and said gas cleaning device, the recuperator being connected to said reversing valve means by said fourth conduit means; means for supplying combustion air to said recuperator, from whence the combustion air is directed through said fourth conduit means to said reversing valve means; and, means for adjusting said reversing valve means between one position permitting waste gases to escape from the furnace through said first conduit means and said first chamber to said third conduit means while permitting combustion air to flow from said fourth conduit means to the furnace through said second chamber and said second conduit means, and another position permitting waste gases to escape from he furnace through said second conduit means and said second chamber to said third conduit means while permitting combustion air to flow from said fourth conduit means to the furnace through said first chamber and said first conduit means.
Claim 2
Dependent Claim
255 words
For use with a regenerative furnace, an apparatus for employing waste gases being discharged from the furnace to heat combustion air being introduced into the furnace, said apparatus comprising: a regenerator having first and second chambers, said chambers being connected respectively by first and second conduit means to opposite sides of the furnace; reversing valve means communicating with said first and second chambers and with third and fourth conduit means, said third conduit means leading from said reversing valve means to a gas cleaning device, the latter device in turn being connected to a chimney; a recuperator in said third conduit means between said reversing valve means and said gas cleaning device, the recuperator being connected to said reversing valve means by said fourth conduit means; means for supplying combustion air to said recuperator, from whence the combustion air is directed through said fourth conduit means to said reversing valve means; and, means for adjusting said reversing valve means between one position permitting waste gases to escape from the furnace through said first conduit means and said first chamber to said third conduit means while permitting combustion air to flow from said fourth conduit means to the furnace through said second chamber and said second conduit means, and another position permitting waste gases to escape from he furnace through said second conduit means and said second chamber to said third conduit means while permitting combustion air to flow from said fourth conduit means to the furnace through said first chamber and said first conduit means.
Claim 3
Dependent Claim
16 words
The apparatus as claimed in claim 1 wherein said gas cleaning device is a bag house.
Claim 4
Dependent Claim
49 words
The apparatus as claimed in claim 1 further characterized by means in said third conduit means between said recuperative heater and said gas cleaning device for admitting ambient air into said third conduit means in order to control the temperature of the gases flowing to said gas cleaning device.
Claim 5
Dependent Claim
31 words
The apparatus as claimed in claim 1 further characterized by a fifth conduit means for supplying a reverse ''''pulse'''' flow of heated air from said recuperator to said gas cleaning device.
Claim 6
Dependent Claim
42 words
The apparatus as claimed in claim 4 further characterized by auxiliary heater means for supplying heated ambient air to said fifth conduit means, and valve means for alternately connecting either said recuperator or said auxiliary heater means to said fifth conduit means.
Claim 7
Dependent Claim
64 words
For use with a regenerative furnace wherein the waste gases are conveyed by conduit means to a gas cleaning device, the improvement comprising regenerative and recuperative heaters connected in series by said conduit means, said heaters being operative to cool the waste gases emitted by the furnace in two stages, while providing a two-stage heating effect for combustion air being admitted into the furnace.
Claim 8
Dependent Claim
64 words
For use with a regenerative furnace wherein the waste gases are conveyed by conduit means to a gas cleaning device, the improvement comprising regenerative and recuperative heaters connected in series by said conduit means, said heaters being operative to cool the waste gases emitted by the furnace in two stages, while providing a two-stage heating effect for combustion air being admitted into the furnace.
References Cited (Backward Citations)
US1905677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |