Patent US3750629A successfully refreshed from Google Patents.
US3750629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooled furnace and a cooling system therefor
Assignee: HOOGOVENS EN STAALFABRIEKEN NL
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Filing: 1971-10-20
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Granted: 1973-08-07
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Expires: 1991-10-20
Abstract
Abstract A furnace over at least part of its outer surface is provided with a double wall, the space enclosed by said double wall being part of a circulation system for cooling liquid without pressure, there being a reservoir above the double wall space in which vaporized cooling liquid can be separated from the cooling mixture, which reservoir is in communication with the upper end and the lower end of the double wall space, the reservoir being in direct open communication with the upper end of the double wall space and being positioned immediately on top thereof and the double wall space being divided into two spaces by an intermediary baffle about parallel to the outer surface of the furnace, said two spaces being in open communication with each other at their upper and lower ends. The reservoir may extend from the upper end of the double wall space in upward and widening outward direction with respect to the furnace wall and may have at least one discharge duct for vapour connected thereto in the proximity of the highest and most outward area of this reservoir; may have in the proximity of the upper end of the double wall space, at the outside thereof, as part of the supply system for cooling liquid a liquid reservoir with an overflow which is connected to the space within the double wall through a narrow connecting passage; and may include other structural features.
Inventors
- 👤 R E Cramer
- 👤 Der Vliet C Van
- 👤 J H W Ouwerkerk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:51
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/12; C; C21; C21B; C21B7/00; C21B7/10; C21D; C21D9/00; C21D9/0006; F27B; F27B1/00; F27B1/005; F27D9/00; F27D2009/0002; F27D2009/004
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
203 words
An improved vaporization cooled furnace, said furnace being of the type comprising: a. a circulating system for cooling liquid, said system comprising 1. a double walled portion extending over at least a part of the outer surface of the furnace, and defining a circulating space for said liquid, 2. a vapor separating reservoir above said double walled portion, and in communication with the upper and lower ends of said space, and b. vapor venting means in communication with said vapor separating reservoir, said furnace being improved in that c. said vapor separating reservoir is positioned immediately on top of said double walled space and has a direct open communication with the upper end of said space, d. said system further comprises baffle means in said space below said vapor separating reservoir, and about parallel to the outer surface of the furnace, which baffle means divides said space into inner liquid and vapor upfloW and outer liquid downflow spaces in open communication with each other at their upper and lower ends, and e. said system further comprises means for establishing a liquid level in said outer downflow space in proximity to the upper end of said baffle means and below said vapor separating reservoir.
Claim 2
Dependent Claim
203 words
An improved vaporization cooled furnace, said furnace being of the type comprising: a. a circulating system for cooling liquid, said system comprising 1. a double walled portion extending over at least a part of the outer surface of the furnace, and defining a circulating space for said liquid, 2. a vapor separating reservoir above said double walled portion, and in communication with the upper and lower ends of said space, and b. vapor venting means in communication with said vapor separating reservoir, said furnace being improved in that c. said vapor separating reservoir is positioned immediately on top of said double walled space and has a direct open communication with the upper end of said space, d. said system further comprises baffle means in said space below said vapor separating reservoir, and about parallel to the outer surface of the furnace, which baffle means divides said space into inner liquid and vapor upfloW and outer liquid downflow spaces in open communication with each other at their upper and lower ends, and e. said system further comprises means for establishing a liquid level in said outer downflow space in proximity to the upper end of said baffle means and below said vapor separating reservoir.
Claim 3
Dependent Claim
64 words
A furnace as claimed in claim 1 wherein: f. said vapor separating reservoir extends from the upper end of said double walled space and widens upwardly and outwardly with respect to the furnace wall, and g. said vapor venting means comprises at least one vapor discharge duct connected to said vapor separating reservoir in proximity to the highest and most outwardly extending portion thereof.
Claim 4
Dependent Claim
154 words
a vapor separating reservoir above said double walled portion, and in communication with the upper and lower ends of said space, and b. vapor venting means in communication with said vapor separating reservoir, said furnace being improved in that c. said vapor separating reservoir is positioned immediately on top of said double walled space and has a direct open communication with the upper end of said space, d. said system further comprises baffle means in said space below said vapor separating reservoir, and about parallel to the outer surface of the furnace, which baffle means divides said space into inner liquid and vapor upfloW and outer liquid downflow spaces in open communication with each other at their upper and lower ends, and e. said system further comprises means for establishing a liquid level in said outer downflow space in proximity to the upper end of said baffle means and below said vapor separating reservoir.
Claim 5
Dependent Claim
154 words
a vapor separating reservoir above said double walled portion, and in communication with the upper and lower ends of said space, and b. vapor venting means in communication with said vapor separating reservoir, said furnace being improved in that c. said vapor separating reservoir is positioned immediately on top of said double walled space and has a direct open communication with the upper end of said space, d. said system further comprises baffle means in said space below said vapor separating reservoir, and about parallel to the outer surface of the furnace, which baffle means divides said space into inner liquid and vapor upfloW and outer liquid downflow spaces in open communication with each other at their upper and lower ends, and e. said system further comprises means for establishing a liquid level in said outer downflow space in proximity to the upper end of said baffle means and below said vapor separating reservoir.
Claim 6
Dependent Claim
47 words
A furnace as claimed in claim 1 wherein: f. said liquid level establishing means comprises, in proximity to the upper end of said downflow space, a cooling liquid reservoir having an overflow therefrom, and g. a narrow passage connecting said liquid reservoir to said liquid downflow space.
Claim 7
Dependent Claim
23 words
A furnace as claimed in claim 3, wherein said narrow passage is connected to said liquid downflow space near the upper end thereof.
Claim 8
Dependent Claim
52 words
A furnace as claimed in claim 1, wherein: f. said means for establishing a liquid level in said downflow space comprises means for supplying liquid to said circulating system and means for heating to approximately its boiling point the liquid being so supplied prior to the delivery thereof into said upflow space.
Claim 9
Dependent Claim
54 words
A furnace as claimed in claim 1, further comprising: f. a splash baffle in said vapor separating reservoir, said splash baffle extending, from the inner wall of the double walled space, outwardly in an upwardly inclined direction above and past said upflow space and curving downwardly above said downflow space and terminating freely thereabove.
Claim 10
Dependent Claim
49 words
A furnace as claimed in claim 6, wherein: g. said means for establishing a liquid level in said downflow space comprises means for supplying cooling liquid opening into said vapor separating reservoir above said upwardly directed splash baffle to flow across said splash baffle into said liquid downflow space.
Claim 11
Dependent Claim
69 words
A furnace as claimed in claim 7, wherein: h. said means for establishing a liquid level in said downflow space further comprises, in proximity to the upper end of said downflow space, a cooling liquid reservoir, i. a narrow passage connecting said cooling liquid reservoir to said downflow space, and j. means for controlling said cooling liquid supplying means in dependence on the liquid level in said liquid reservoir.
Claim 12
Dependent Claim
34 words
A furnace as claimed in claim 8, wherein said controlling means comprises a switching means in said liquid reservoir operated at maximum and minimum levels of liquid therein for controlling said liquid supplying means.
Claim 13
Dependent Claim
39 words
A furnace as claimed in claim 1, wherein said system further comprises: f. a set of baffles positioned substantially vertically and extending into said upflow space in a direction from the inside of the furnace toward the outside thereof.
Claim 14
Dependent Claim
22 words
A furnace as claimed in claim 10, wherein said baffle means extends upwardly to a higher level than said set of baffles.
Claim 15
Dependent Claim
62 words
A furnace as claimed in claim 1, wherein: f. the widths of said inner upflow and outer downflow spaces are proportioned in the range of from 1.5 to 1 up to 2.5 to 1, and g. the sum of said widths at the upper end of said baffle means is about twice the sum of said widths at the lower end thereof.
Claim 16
Dependent Claim
43 words
A furnace as claimed in claim 12, wherein: h. the width of said inner upflow space is about 10 centimeters at the lower end of said baffle means and gradually increases to about 20 centimeters at the upper end of said baffle means.
Claim 17
Dependent Claim
196 words
An improved vaporization cooling system for a furnace, said cooling system comprising: a. a double walled portion for extending over at least a part of the outer surface of the furnace and defining a circulating space for said Liquid, b. a vapor separating reservoir above said double walled portion, and in communication with the upper and lower ends of said space, and vapor venting means in communication with said vapor separating reservoir, said cooling system being improved in that c. said vapor separating reservoir is positioned immediately on top of said double walled space and has a direct open communication with the upper end of said space, d. said system further comprises baffle means in said space below said vapor separating reservoir positioned to lie about parallel to the outer surface of the furnace, which baffle means divides said space into inner liquid and vapor upflow and outer liquid downflow spaces in open communication with each other at their upper and lower ends, and e. said system further comprises means for establishing a liquid level in said outer downflow space in proximity to the upper end of said baffle means and below said vapor separating reservoir.
Claim 18
Dependent Claim
196 words
An improved vaporization cooling system for a furnace, said cooling system comprising: a. a double walled portion for extending over at least a part of the outer surface of the furnace and defining a circulating space for said Liquid, b. a vapor separating reservoir above said double walled portion, and in communication with the upper and lower ends of said space, and vapor venting means in communication with said vapor separating reservoir, said cooling system being improved in that c. said vapor separating reservoir is positioned immediately on top of said double walled space and has a direct open communication with the upper end of said space, d. said system further comprises baffle means in said space below said vapor separating reservoir positioned to lie about parallel to the outer surface of the furnace, which baffle means divides said space into inner liquid and vapor upflow and outer liquid downflow spaces in open communication with each other at their upper and lower ends, and e. said system further comprises means for establishing a liquid level in said outer downflow space in proximity to the upper end of said baffle means and below said vapor separating reservoir.
Claim 19
Dependent Claim
41 words
A cooling system as claimed in claim 14, particularly adapted for cooling the wall of a vertical shaft furnace, and comprising a series of separate units formed to abut one another and extend around part of the wall of such furnace.
Claim 20
Dependent Claim
39 words
A cooling system as claimed in claim 14, particularly adapted for cooling opposite vertical walls of a tunnel furnace, and comprising two series of separate units formed to extend along the two opposite walls of the tunnel furnace, respectively.
Claim 21
Dependent Claim
18 words
A cooling system according to claim 16, said two series each comprising at least one of said units.
Claim 22
Dependent Claim
22 words
A cooling system as claimed in claim 17, said two series each comprising a plurality of said units in mutually abutting relation.
Claim 23
Dependent Claim
86 words
A cooling system as claimed in claim 16, and in combination therewith a tunnel furnace, the inner wall of the double walled portion of said cooling system forming the outer wall of part of said furnace, said furnace having a gas space therein adjacent said wall, and also having a partition wall separating said gas space from the tunnel of the furnace, said partition wall having passage means at its top and bottom portions providing for circulation of gas from said tunnel through said gas space.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |