US3607130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reformer furnace
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1969-09-24
•
Granted: 1971-09-21
•
Expires: 1989-09-24
Abstract
Abstract A tubular reformer furnace is provided with refractory lined outlet headers, (inlet headers may be lined) said headers being external to the furnace box in order to eliminate excessive thermal growth of the headers, and relatively small diameter unlined tubing is provided for connecting the inlet header with the tubes in order to absorb the differential thermal expansion between the tubes and headers, the small diameter tubing having more than one bend which exceeds 180*.
Inventors
- 👤 Arthur C Worley
- 👤 Frank A Devine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:01
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/06; B01J8/062; C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/384
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
17 words
The furnace of claim 1 wherein the interior surface of the inlet header is provided with insulation.
Claim 2
Dependent Claim
26 words
The furnace of claim 1 wherein the flexible piping for connecting said inlet head to said tubes has at least one bend in excess of 180.*
Claim 3
Dependent Claim
15 words
The furnace of claim 3 wherein said piping is in the form of a helix.
Claim 4
Dependent Claim
26 words
The furnace of claim 1 wherein said refractory insulation comprises an insulating castable refractory layer and a dense refractory layer having less than 0.1 percent silica.
Claim 5
Dependent Claim
18 words
The furnace of claim 1 wherein said vertical pipe is an alloy steel pipe that is externally insulated.
Claim 6
Dependent Claim
189 words
A furnace primarily for the reforming of hydrocarbons which comprises in combination: a furnace box; a plurality of vertically oriented tubes extending through said furnace box in which the reforming operation is effected, the upper and lower ends of said tubes being located external to said furnace box; horizontally disposed inlet header means provided with insulation on the interior surface thereof; flexible piping for connecting said inlet header to said tubes external to said furnace box, said flexible piping having a smaller diameter than said tubes, said piping having at least one bend in excess of 180* and a radius 3 to 6 times its diameter; elastic means located outside said furnace box for supporting said tubes; horizontally disposed outlet header means provided with insulation on the interior surface thereof, said insulation being a refractory lining having less than 0.1 percent silica; vertical alloy piping for connecting said tubes to said outlet header external of the furnace box, said piping comprising an inflexible alloy pipe having a smaller diameter than said tubes, and a length of about 1 to 3 feet and extending into said header through said insulation.
Claim 7
Dependent Claim
18 words
The furnace of claim 7 wherein that portion of the tubes external to the furnace box is insulated.
Claim 8
Dependent Claim
25 words
The furnace of claim 7 wherein said insulation comprises an insulated castable refractory layer and a dense refractory layer having less than 0.1 percent silica.
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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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |