Oxygen-fuel burner with adjustable flame characteristics
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F23M-003/02
F23M-003/04
출원번호
US-0956370
(2001-09-17)
발명자
/ 주소
Borders, Harley A.
Joshi, Mahendra L.
Streicher, Eric
Legiret, Thierry
출원인 / 주소
L'Air Liquide - Societe Anonyme a' Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude, American Air Liquide
대리인 / 주소
Russell, Linda K.
인용정보
피인용 횟수 :
16인용 특허 :
14
초록▼
An oxy-fuel burner generates a long, luminous, stable and adjustable flame temperature profile flame by incorporating separate, fuel and oxygen jets oriented in a unique geometry. In one preferred embodiment, the fuel is injected horizontally at medium injection velocity (50-200 m/s) while primary o
An oxy-fuel burner generates a long, luminous, stable and adjustable flame temperature profile flame by incorporating separate, fuel and oxygen jets oriented in a unique geometry. In one preferred embodiment, the fuel is injected horizontally at medium injection velocity (50-200 m/s) while primary oxygen is injected underneath the fuel jet at supersonic velocity (300-500 m/s). The supersonic velocity oxygen jet (20 to 50% required for stoichiometric combustion) entrains fuel and furnaces gases in it's core for the primary flame development over the furnace load. The subsequent mixing of the fuel, primary oxygen and entrained furnace gases establish a low NOx, stable, long and luminous primary flame. The secondary oxidant, preferably air or low purity oxygen (50 to 80% of stoichiometric needs), is injected above the flame using one or more oxygen jets to create an oxy-fuel flame with adjustable flame characteristics. The secondary oxidant completes unfinished combustion of flame gases containing CO, H2,CH4,soot and HC. The horizontal injection angle for all jets allow delayed mixing and a much longer flame. Due to the massive furnace gas entrainment process, the resulting flame provides adjustability in flame temperature profile as well as lower NOx formation. By changing the fuel, primary oxygen, and secondary oxidant injection velocities, the relative proportion of primary and secondary oxidants, and the relative positions of injectors, a fully adjustable flame is developed.
대표청구항▼
An oxy-fuel burner generates a long, luminous, stable and adjustable flame temperature profile flame by incorporating separate, fuel and oxygen jets oriented in a unique geometry. In one preferred embodiment, the fuel is injected horizontally at medium injection velocity (50-200 m/s) while primary o
An oxy-fuel burner generates a long, luminous, stable and adjustable flame temperature profile flame by incorporating separate, fuel and oxygen jets oriented in a unique geometry. In one preferred embodiment, the fuel is injected horizontally at medium injection velocity (50-200 m/s) while primary oxygen is injected underneath the fuel jet at supersonic velocity (300-500 m/s). The supersonic velocity oxygen jet (20 to 50% required for stoichiometric combustion) entrains fuel and furnaces gases in it's core for the primary flame development over the furnace load. The subsequent mixing of the fuel, primary oxygen and entrained furnace gases establish a low NOx, stable, long and luminous primary flame. The secondary oxidant, preferably air or low purity oxygen (50 to 80% of stoichiometric needs), is injected above the flame using one or more oxygen jets to create an oxy-fuel flame with adjustable flame characteristics. The secondary oxidant completes unfinished combustion of flame gases containing CO, H2,CH4,soot and HC. The horizontal injection angle for all jets allow delayed mixing and a much longer flame. Due to the massive furnace gas entrainment process, the resulting flame provides adjustability in flame temperature profile as well as lower NOx formation. By changing the fuel, primary oxygen, and secondary oxidant injection velocities, the relative proportion of primary and secondary oxidants, and the relative positions of injectors, a fully adjustable flame is developed. gments of multi-filament glass strand is described. The densified pellets may be advantageously produced by hydrating chopped glass strands and then pelletizing them by tumbling in a rotary drum, densifying the resulting pellets by tumbling in a rotating zig-zag or undulating tube, drying the pellets and encapsulating them in a polymeric composition. The resulting pellets exhibit enhanced degradation resistance during bulk storage and handling.
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이 특허에 인용된 특허 (14)
Joshi Mahendra L. (Altamonte Springs FL) Nabors James K. (Apopka FL) Slavejkov Aleksandar G. (Allentown PA), Adjustable momentum self-cooled oxy/fuel burner for heating in high temperature environments.
Slavejkov Aleksandar G. (Allentown PA) Gosling Thomas M. (Bethlehem PA) Knorr ; Jr. Robert E. (Allentown PA), Low-NOx staged combustion device for controlled radiative heating in high temperature furnaces.
Joshi Mahendra L. (Altamonte Springs FL) Broadway Lee (Eustis FL) Mohr Patrick J. (Mims FL), Method and apparatus for injecting fuel and oxidant into a combustion burner.
Slavejkov Aleksandar G. (Allentown PA) Gosling Thomas M. (Bethlehem PA) Knorr ; Jr. Robert E. (Allentown PA), Method and device for low-NOx high efficiency heating in high temperature furnaces.
Joshi, Mahendra Ladharam; Li, Xianming Jimmy; Licht, William Robert; Slavejkov, Aleksandar Georgi; DiMartino, Sr., Stephen Paul, Flame straightening in a furnace.
Watson, Matthew James; Habel, Michael Edward; Lievre, Kevin Alan; He, Xiaoyi, Furnace and process for controlling the oxidative state of molten materials.
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