IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0167771
(2002-06-11)
|
우선권정보 |
FR-0008665 (2001-06-29) |
발명자
/ 주소 |
- Landais, Thierry
- Bellin-Croyat, Thierry
|
출원인 / 주소 |
- Gaz de France (GDF) Service National
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
10 |
초록
▼
The invention relates to a radiant device with a burner of the "glove finger" type, comprising an exchanger (3) for heating air (T1) by the burned gases (T2), a furnace tube (6) drilled with air-intake orifices (60) and terminated by a nozzle (61) disposed facing a recirculation tube (4), and a cent
The invention relates to a radiant device with a burner of the "glove finger" type, comprising an exchanger (3) for heating air (T1) by the burned gases (T2), a furnace tube (6) drilled with air-intake orifices (60) and terminated by a nozzle (61) disposed facing a recirculation tube (4), and a central gas-injection tube (7). According to the invention, the central injection tube (7) is fed with gaseous fluids in proportions that can be regulated by means of one or two valves (710, 720), via two conduits (71, 72), the first (71) of which transports at least gas and the second (72) of which transports at least air, and the central injection tube (7) ends at a burner (8), which is disposed in the furnace tube (6) and which discharges at the level of the nozzle (61), this arrangement making it possible to adapt existing devices very easily for the purpose of reduced production of nitrogen oxides.
대표청구항
▼
1. A radiant device with gas burner and recirculation of burned gases for heating a vessel (1) bounded by a wall (10), this device comprising in longitudinal axial direction (L) a section (Se) external to the vessel (1) and a section (Si) both internal to the vessel and divided into three internal s
1. A radiant device with gas burner and recirculation of burned gases for heating a vessel (1) bounded by a wall (10), this device comprising in longitudinal axial direction (L) a section (Se) external to the vessel (1) and a section (Si) both internal to the vessel and divided into three internal subsections (Si1, Si2, Si3) disposed successively at increasing distance from the wall (10) and, in inward radial direction (R), an envelope (2) comprising an external casing (21) and an internal envelope tube (22), the end (220) of which remote from the wall (10) is closed, an exchanger (3) disposed in the envelope (2) and extending over a portion of the external section (Se) and over the first two internal sections (Si1, Si2), a recirculation tube (4) extending over the third internal section (Si3) at a radial distance from the envelope tube (22) and having open inlet (41) and outlet (42) ends respectively relatively close to and relatively far from the wall (10) of the vessel, a retaining tube (5) internal to the exchanger (3) and extending over a portion of the external section (Se) and over the first internal section (Si1), a furnace tube (6) disposed in the exchanger (3), retained by the retaining tube (5) in the extension thereof and extending over the second internal section (Si2), and a central injection tube (7) transporting the gas, extending at least into the retaining tube (5) and traversing a partition (56) separating the retaining tube (5) from the furnace tube (6), the exchanger (3) comprising a separating tube (30) that defines with the retaining tube (5) and the furnace tube (6) an air intake path (T1) starting in an intake inlet (211) drilled in the casing (21) and ending at intake orifices (60) drilled in the furnace tube (6), the separating tube (30) defining with the envelope (2) a smoke-exhaust path (T2) ending at an exhaust outlet (212) drilled in the casing (21), and the furnace tube (6) ending in a nozzle (61) disposed facing the inlet end (41) of the recirculation tube (4), wherein the central injection tube (7) is fed by two conduits (71, 72), the first (71) of which transports at least gas and the second (72) of which transports at least air, in that the central injection tube (7) ends at a burner (8) disposed in the furnace tube (6) and discharging at the level of the nozzle (61), and in that a valve (710, 720) is interposed in at least one (72) of the conduits (71, 72), outside the casing (21). 2. A device according to claim 1, wherein the first conduit (71) transports gas, in that the second conduit (72) transports air, and in that the central injection tube (7) is composed of a single injection blowpipe in which the first and second conduits (71, 72) discharge. 3. A device according to claim 2, wherein the valve (720) is interposed in the second conduit (72), to control the air flowrate. 4. A device according to claim 1, wherein the first conduit (71) transports gas, in that the second conduit (72) transports a mixture of air and gas, and in that the central injection tube (7) is composed of two concentric injection blowpipes in which the first and second conduits (71, 72) discharge respectively. 5. A device according to claim 4, wherein the valve (710) is interposed in the first conduit (71), to control the gas flowrate.
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