US3706445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fume incinerator
Assignee: GRANCO-CLARK Inc A CORP OF MI
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Filing: 1971-09-30
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Granted: 1972-12-19
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Expires: 1991-09-30
Abstract
Abstract An incinerator for a drying oven and the like to remove combustible fumes such as solvent vapors from the exhaust from such ovens. The incinerator is formed from a narrow, elongated, heat-conducting, metal incinerator conduit having at least one U or reverse bend to increase turbulence within the conduit and to increase heat exchange of hot gases with the exterior of the conduit. The fume-laden gases to be incinerated are channelled along the exterior surface of the incinerator conduit for heat exchange with the incinerator. A fan draws the solvent-laden gases through the larger preheat conduit and forces the preheated gases into the incinerator conduit at a higher pressure than that of the preheat conduit. In one embodiment, a portion of the combusted gases from the incinerator conduit is admixed with the solvent and air mixture in the preheat conduit to assist in preheating the mixture. The incinerator can be built into the oven with which it is used, or can be a separate entity mounted on top of the oven or even separated from the oven by ducting.
Inventors
- 👤 Charles B Gentry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:02
CPC Classifications
F; F26; F26B; F26B23/00; F26B23/02; F26B23/022
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
183 words
In a drying oven of the type wherein an oxidizable mixture of solvent and air is evolved during the drying process in a drying section, and in which the mixture is incinerated before exhausting to the atmosphere, the improvement which comprises: an integrated incinerator section communicating with said drying section; a radiant tube burner within said incinerator section, said radiant tube formed of an elongated conduit having an entrance end and an exit end; means communicating said exit end of said elongated conduit directly with the exterior of said incinerator section to exhaust to the atmosphere combustion products passing through said elongated conduit; means for passing a first portion of said mixture through said incinerator section from said drying section and in heat exchange relationship with the exterior surface of said elongated conduit; means to pass a second portion of said mixture to said entrance end of and through said elongated conduit; and means to heat said second portion of said mixture within said elongated conduit to a temperature sufficient to substantially completely oxidize said solvent in said second portion of said mixture.
Claim 2
Dependent Claim
183 words
In a drying oven of the type wherein an oxidizable mixture of solvent and air is evolved during the drying process in a drying section, and in which the mixture is incinerated before exhausting to the atmosphere, the improvement which comprises: an integrated incinerator section communicating with said drying section; a radiant tube burner within said incinerator section, said radiant tube formed of an elongated conduit having an entrance end and an exit end; means communicating said exit end of said elongated conduit directly with the exterior of said incinerator section to exhaust to the atmosphere combustion products passing through said elongated conduit; means for passing a first portion of said mixture through said incinerator section from said drying section and in heat exchange relationship with the exterior surface of said elongated conduit; means to pass a second portion of said mixture to said entrance end of and through said elongated conduit; and means to heat said second portion of said mixture within said elongated conduit to a temperature sufficient to substantially completely oxidize said solvent in said second portion of said mixture.
Claim 3
Dependent Claim
181 words
In a drying oven of the type wherein an oxidizable mixture of solvent and air is evolved during the drying process in a drying section, and in which the mixture is incinerated before exhausting to the atmosphere, the improvement which comprises: an incinerator section communicating with said drying section; a radiant tube burner within said incinerator section, said radiant tube burner formed from a narrow elongated conduit having an entrance end and an exit end; means for passing a first portion of said mixture through said incinerator section from said drying section and in heat exchange relationship with said elongated conduit; means to pass a second portion of said mixture to said entrance end of and through said elongated conduit, said second portion passing means including means for heat exchanging said second portion of said mixture with said elongated conduit prior to passing through said elongated conduit; and means to heat said second portion of said mixture within said elongated conduit to a temperature suffIcient to oxidize the solvent in said second portion of said mixture passing through said elongated conduit.
Claim 4
Dependent Claim
181 words
In a drying oven of the type wherein an oxidizable mixture of solvent and air is evolved during the drying process in a drying section, and in which the mixture is incinerated before exhausting to the atmosphere, the improvement which comprises: an incinerator section communicating with said drying section; a radiant tube burner within said incinerator section, said radiant tube burner formed from a narrow elongated conduit having an entrance end and an exit end; means for passing a first portion of said mixture through said incinerator section from said drying section and in heat exchange relationship with said elongated conduit; means to pass a second portion of said mixture to said entrance end of and through said elongated conduit, said second portion passing means including means for heat exchanging said second portion of said mixture with said elongated conduit prior to passing through said elongated conduit; and means to heat said second portion of said mixture within said elongated conduit to a temperature suffIcient to oxidize the solvent in said second portion of said mixture passing through said elongated conduit.
Claim 5
Dependent Claim
28 words
A drying oven according to claim 2 further comprising means to recycle said first portion of the heat exchanged mixture from said incinerator section to said drying section.
Claim 6
Dependent Claim
35 words
A drying oven according to claim 2 and further comprising means for adjusting the relative amounts of said first and second proportions of said mixture passing through said radiant tube and to said drying section.
Claim 7
Dependent Claim
19 words
A drying oven according to claim 4 wherein said adjusting means comprises a movable baffle within said incinerator section.
Claim 8
Dependent Claim
33 words
A drying oven according to claim 3 and further comprising an auxiliary heating means in said recycle means to maintain the temperature of said first portion of said mixture at a predetermined value.
Claim 9
Dependent Claim
55 words
A drying oven according to claim 6 and further comprising temperature sensing means to sense the temperature in said drying section and means to control the heat output from said auxiliary heating means in accordance with a signal from said temperature sensing means to maintain the temperature in said drying section at a predetermined value.
Claim 10
Dependent Claim
164 words
In a drying oven of the type wherein an oxidizable mixture of solvent and air is evolved during the drying process in a drying section, and in which the mixture is incinerated before exhausting to the atmosphere, the improvement which comprises: an incinerator section communicating with said drying section; a radiant tube burner within said incinerator section, said radiant tube burner formed of an elongated conduit having an entrance end and an exit end, said elongated conduit forming a reversing coil within said incinerator section; means for passing a first portion of said mixture through said incinerator section from said drying section and in heat exchange relationship with said elongated conduit; means to pass a second portion of said mixture to said entrance end of and through said elongated conduit; and means to heat said second portion of said mixture within said elongated conduit to a temperature sufficient to oxidize the solvent in said second portion of said mixture passing through said elongated conduit.
Claim 11
Dependent Claim
164 words
In a drying oven of the type wherein an oxidizable mixture of solvent and air is evolved during the drying process in a drying section, and in which the mixture is incinerated before exhausting to the atmosphere, the improvement which comprises: an incinerator section communicating with said drying section; a radiant tube burner within said incinerator section, said radiant tube burner formed of an elongated conduit having an entrance end and an exit end, said elongated conduit forming a reversing coil within said incinerator section; means for passing a first portion of said mixture through said incinerator section from said drying section and in heat exchange relationship with said elongated conduit; means to pass a second portion of said mixture to said entrance end of and through said elongated conduit; and means to heat said second portion of said mixture within said elongated conduit to a temperature sufficient to oxidize the solvent in said second portion of said mixture passing through said elongated conduit.
Claim 12
Dependent Claim
183 words
A drying oven for removal of solvents from coated metal sheets, said oven comprising: an elongated chamber; means to pass said coated metal sheets through said elongated chamber for drying; means to supply heated gases to said elongated chamber to remove solvents on said metal sheets within said chamber; means for removing a mixture of solvents and air from said chamber; and means to oxidize said solvents thus removed from said chamber; the improvement in said oxidation means which comprises: a radiant tube burner comprising an elongated tube having at least one reverse or U-bend between an entrance end and an exit end thereof; means to pass at least a portion of said solvents and air mixture over an outer surface of said elongated tube in heat exchange relationship therewith; means to pass said heat exchanged solvents and air mixture to said entrance end and through said elongated tube at a high velocity; and means to heat said solvent and air mixture passing through said elongated tube to an elevated temperature sufficient to oxidize said solvents in said mixture within said elongated tube.
Claim 13
Dependent Claim
183 words
A drying oven for removal of solvents from coated metal sheets, said oven comprising: an elongated chamber; means to pass said coated metal sheets through said elongated chamber for drying; means to supply heated gases to said elongated chamber to remove solvents on said metal sheets within said chamber; means for removing a mixture of solvents and air from said chamber; and means to oxidize said solvents thus removed from said chamber; the improvement in said oxidation means which comprises: a radiant tube burner comprising an elongated tube having at least one reverse or U-bend between an entrance end and an exit end thereof; means to pass at least a portion of said solvents and air mixture over an outer surface of said elongated tube in heat exchange relationship therewith; means to pass said heat exchanged solvents and air mixture to said entrance end and through said elongated tube at a high velocity; and means to heat said solvent and air mixture passing through said elongated tube to an elevated temperature sufficient to oxidize said solvents in said mixture within said elongated tube.
Claim 14
Dependent Claim
57 words
A drying oven according to claim 9 wherein said heated gases supply means for said elongated chamber comprises means to pass a second portion of said mixture over an outer surface of said elongated tube in heat exchange relationship therewith, and means to pass said heat exchanged second portion of said mixture to said elongated oven chamber.
Claim 15
Dependent Claim
63 words
A drying oven according to claim 10 wherein said oxidizing means comprises a burner for supplying heated gases to said elongated tube; means to sense the temperature within said elongated tube; and control means to adjust the heat output from said burner to maintain saId temperature of said elongated tube within predetermined limits responsive to the temperature sensed by said temperature sensing means.
Claim 16
Dependent Claim
67 words
A drying oven according to claim 11 and further comprising an auxiliary burner in said heated gas supply means for said elongated chamber; means to sense the temperature within said elongated chamber; and control means to adjust the heat output of said auxiliary burner responsive to the temperature sensed by said elongated chamber temperature sensing means to maintain the temperature within said elongated chamber within given limits.
Claim 17
Dependent Claim
65 words
A drying oven according to claim 9 wherein said mixture passing means comprises a tubular conduit encircling at least a portion of said elongated conduit leaving an annular space therebetween, said tubular conduit being open at one end for entrance of said solvent and air mixture, and an opposite end of said tubular conduit being in communication with an entrance end of said elongated conduit.
Claim 18
Dependent Claim
177 words
In a drying oven of the type wherein an oxidizable mixture of solvent and air is evolved during the drying process, and in which the mixture is incinerated before it is exhausted to the atmosphere, the improvement which comprises: an incinerator comprising a housing with a burner tube extending therethrough, said burner tube having an entrance end and an exit end; means for introducing at least a portion of said solvent and air mixture from said drying oven into said housing; means for drawing said mixture through said housing in contact with an exterior surface of said burner tube thereby preheating said mixture, and means for forcing said heat exchanged mixture into said entrance end of said burner tube; means for heating said preheated mixture within said burner tube to a higher temperature suitable for oxidizing said solvent in said mixture and thereby oxidizing said solvent in said mixture; and means communicating the exit end of said burner tube with the exterior of said housing to exhaust the oxidized mixture from said burner exteriorly of said housing.
Claim 19
Dependent Claim
177 words
In a drying oven of the type wherein an oxidizable mixture of solvent and air is evolved during the drying process, and in which the mixture is incinerated before it is exhausted to the atmosphere, the improvement which comprises: an incinerator comprising a housing with a burner tube extending therethrough, said burner tube having an entrance end and an exit end; means for introducing at least a portion of said solvent and air mixture from said drying oven into said housing; means for drawing said mixture through said housing in contact with an exterior surface of said burner tube thereby preheating said mixture, and means for forcing said heat exchanged mixture into said entrance end of said burner tube; means for heating said preheated mixture within said burner tube to a higher temperature suitable for oxidizing said solvent in said mixture and thereby oxidizing said solvent in said mixture; and means communicating the exit end of said burner tube with the exterior of said housing to exhaust the oxidized mixture from said burner exteriorly of said housing.
Claim 20
Dependent Claim
77 words
The drying oven according to claim 14 wherein said burner tube is of elongated construction and said incinerator further comprises a tubular conduit encircling said burner tube and extending along at least a portion of the length of said burner tube, said tubular conduit being open to the interior of said housing at one end and communicating with the interior of said entrance end of said burner tube at another end through said drawing and forcing means.
Claim 21
Dependent Claim
157 words
An incinerator for use in connection with a drying oven of the type wherein an oxidizable mixture of solvent and air is evolved during the drying process, said incinerator comprising: a housing with a burner tube extending therethrough, said burner tube having an entrance end and an exit end; means for introducing solvent and air mixture from said drying oven into said housing; means for drawing said mixture through said housing in contact with an exterior surface of said burner tube thereby preheating said mixture, and means for forcing said preheated mixture into said entrance end of said burner tube; means for heating said preheated mixture within said burner tube to higher temperature suitable for oxidizing solvent in said mixture, whereby said solvent in said mixture is oxidized; and means communicating the exit end of said burner tube with the exterior of said housing to exhaust the oxidized mixture from said burner tube exteriorly of said housing.
Claim 22
Dependent Claim
157 words
An incinerator for use in connection with a drying oven of the type wherein an oxidizable mixture of solvent and air is evolved during the drying process, said incinerator comprising: a housing with a burner tube extending therethrough, said burner tube having an entrance end and an exit end; means for introducing solvent and air mixture from said drying oven into said housing; means for drawing said mixture through said housing in contact with an exterior surface of said burner tube thereby preheating said mixture, and means for forcing said preheated mixture into said entrance end of said burner tube; means for heating said preheated mixture within said burner tube to higher temperature suitable for oxidizing solvent in said mixture, whereby said solvent in said mixture is oxidized; and means communicating the exit end of said burner tube with the exterior of said housing to exhaust the oxidized mixture from said burner tube exteriorly of said housing.
Claim 23
Dependent Claim
76 words
An incinerator according to claim 16 wherein said burner tube is of elongated construction and further comprising a tubular conduit encircling said burner tube and extending along at least a portion of the length of said burner tube, said tubular conduit being open at one end for reception of said solvent and air mixture and communicating at another end with the interior of said entrance end of said burner tube through said drawing and forcing means.
Claim 24
Dependent Claim
17 words
An incinerator according to clAim 16 wherein said burner tube has at least one reverse or U-bend.
Claim 25
Dependent Claim
124 words
An incinerator for use in connection with a drying oven of the type wherein a mixture of an oxidizable solvent and air is evolved during the drying process, said incinerator comprising: an elongated burner tube having an entrance end and an exit end; means for heat exchanging said solvent and air mixture with hot gases within said elongated burner tube; fan means for drawing said mixture through said heat exchange means, thereby preheating said mixture, and for forcing said mixture into said entrance end of said burner tube; means for heating said preheated mixture within said burner tube to a higher temperature suitable for oxidizing said solvent in said mixture; and means for withdrawing combusted gases from the exit end of said burner tube.
Claim 26
Dependent Claim
124 words
An incinerator for use in connection with a drying oven of the type wherein a mixture of an oxidizable solvent and air is evolved during the drying process, said incinerator comprising: an elongated burner tube having an entrance end and an exit end; means for heat exchanging said solvent and air mixture with hot gases within said elongated burner tube; fan means for drawing said mixture through said heat exchange means, thereby preheating said mixture, and for forcing said mixture into said entrance end of said burner tube; means for heating said preheated mixture within said burner tube to a higher temperature suitable for oxidizing said solvent in said mixture; and means for withdrawing combusted gases from the exit end of said burner tube.
Claim 27
Dependent Claim
49 words
An incinerator according to claim 19 wherein said heat exchange means includes means in said elongated burner tube for passing a portion of said combusted gases into a preheat zone for admixture with said solvent and air mixture for direct heat exchange between said mixture and said hot gases.
Claim 28
Dependent Claim
154 words
An incinerator for use in connection with a drying oven of the type wherein a mixture of an oxidizable solvent and air is evolved during the drying process, said incinerator comprising: an elongated burner tube having an entrance end and an exit end, said burner tube having a length substantially greater than any cross-sectional dimension of said burner tube; said burner tube having at least one U or reverse bend between said entrance and exit end; means for passing said solvent and air mixture over an exterior surface of said burner tube for heat exchange therewith, thereby preheating said mixture, means for passing said preheated mixture to said entrance end of said burner tube; means for raising the temperature of said preheated mixture to a higher temperature suitable for oxidizing said solvent in said mixture in said burner tube; and means for removing products of combustion from said exit end of said burner tube.
Claim 29
Dependent Claim
154 words
An incinerator for use in connection with a drying oven of the type wherein a mixture of an oxidizable solvent and air is evolved during the drying process, said incinerator comprising: an elongated burner tube having an entrance end and an exit end, said burner tube having a length substantially greater than any cross-sectional dimension of said burner tube; said burner tube having at least one U or reverse bend between said entrance and exit end; means for passing said solvent and air mixture over an exterior surface of said burner tube for heat exchange therewith, thereby preheating said mixture, means for passing said preheated mixture to said entrance end of said burner tube; means for raising the temperature of said preheated mixture to a higher temperature suitable for oxidizing said solvent in said mixture in said burner tube; and means for removing products of combustion from said exit end of said burner tube.
Claim 30
Dependent Claim
99 words
In a method of incinerating combustible fumes in a mixture of such fumes and air wherein said mixture is heated to an elevated temperature suitable for oxidation of said fumes in a combustion zone, the improvement which comprises: drawing said mixture through a preheat zone over an external surface of said combustion zone in heat exchange therewith to preheat said mixture, increasing the pressure on said preheated mixture and passing said mixture to said combustion zone at a pressure higher than said mixture in said preheat zone, and transferring heat from said combustion zone directly to said preheat zone.
Claim 31
Dependent Claim
99 words
In a method of incinerating combustible fumes in a mixture of such fumes and air wherein said mixture is heated to an elevated temperature suitable for oxidation of said fumes in a combustion zone, the improvement which comprises: drawing said mixture through a preheat zone over an external surface of said combustion zone in heat exchange therewith to preheat said mixture, increasing the pressure on said preheated mixture and passing said mixture to said combustion zone at a pressure higher than said mixture in said preheat zone, and transferring heat from said combustion zone directly to said preheat zone.
Claim 32
Dependent Claim
36 words
A method according to claim 22 wherein said heat transfer step comprises passing a portion of the combustion products from said combustion zone to said preheat zone for admixture with said mixture of fumes and air.
Claim 33
Dependent Claim
28 words
A method of incinerating combustible fumes according to claim 22 wherein the velocity of said mixture passing through said combustion zone is at least 3,000 feet per minute.
Claim 34
Dependent Claim
32 words
A method of incinerating combustible fumes according to claim 22 wherein the velocity of said mixture passing through said combustion zone is in the range of 5,000 to 6,000 feet per minute.
Claim 35
Dependent Claim
25 words
A method of incinerating combustible fumes according to claim 22 and further comprising reversing the direction of flow of said mixture in said combustion zone.
References Cited (Backward Citations)
US1603760A
Cited
US3472468A
Cited
US3311456A
Cited
US3484189A
Cited
US3547592A
Cited
US3549333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |