US20050255416A1 - Use of a blue flame burner - Google Patents
Use of a blue flame burner Download PDFInfo
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- US20050255416A1 US20050255416A1 US10/521,882 US52188205A US2005255416A1 US 20050255416 A1 US20050255416 A1 US 20050255416A1 US 52188205 A US52188205 A US 52188205A US 2005255416 A1 US2005255416 A1 US 2005255416A1
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- fischer
- tropsch
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/04—Liquid carbonaceous fuels essentially based on blends of hydrocarbons
Definitions
- the invention is directed to an improved use of a blue flame burner.
- the general pattern of the flame of such an oil burner assembly is one of heterogeneity in terms of fuel concentrations; the pockets of fuel lean mixture give rise to high nitric oxide concentrations from both, the fuel nitrogen and the atmospheric nitrogen, while the pockets of fuel rich mixture give rise to soot.
- the visible flame from such a system is yellow.
- the yellow colour is the visible radiation from the high temperature soot particles and this completely masks other visible radiations as far as the human eye is concerned. These soot particles result from unburnt carbon.
- Blue flame burners are known to have low NO X emissions. Nevertheless there is a need for even lower NO X emissions. Especially the NO X emissions when petroleum derived fuels such as gas oil or kerosene is used are sometimes too high.
- the object of the present invention is a use of a blue flame burner wherein the emissions of NO X is reduced as compared to the prior art situation.
- Applicants have found that the low NO X emissions of a blue flame burner can be even further reduced when a Fischer-Tropsch derived fuel is used. An even further advantage is that the carbon monoxide emission is reduced. A next advantage is that less odor during start and extinction of the blue flame burner has been observed when using this fuel. This is very advantageous, especially when such a burner is used in a domestic environment.
- the blue flame burner is characterized in that the combustion of the hydrocarbon fuel to carbon dioxide is performed such that part of the flue gas is recycled to the flame and more suitably to the nozzle of the burner. Recycling part of the flue gas externally of the burner may effect such recirculation of the flue gas. Alternatively recycling may be achieved by swirling the combustible mixture of fuel and oxygen containing gas wherein at the axis of the swirling flame some recirculation of flue gas takes place.
- FIG. 1 shows a schematic representation of a blue flame burner with an external recirculation of flue gas.
- FIG. 1 shows a blue flame burner 1 having means 2 to supply a liquid fuel and means 3 to supply an oxygen containing gas.
- the oxygen containing gas is usually air.
- Means 4 to mix the fuel and air to form a combustible mixture which is fed to pre-combustion space 5 , which is formed by the interior of tubular part 6 .
- Tubular part 6 is placed co-axial in a larger tubular part 7 , which forms the final combustion space 8 .
- Flue gas is discharged via outlet opening 9 into the outlet space 10 .
- Openings 11 in tubular part 7 serve as means to recycle part of the flue gas to the final combustion space 8 .
- Openings 12 in tubular part 6 serve as means to recycle part of the gas present in the final combustion space 8 to the pre-combustion space 5 .
- the operating conditions of the blue flame burner may be the same as the operating conditions used for the state of the art fuels.
- the proportion of air in excess of that required for stoichiometric combustion is known as the excess air ratio or “lambda”, which is defined as the ratio of total air available for combustion to that required to burn all of the fuel.
- the lambda is between 1 and 2 and more preferably between 1 and 1.6. Applicants found that by using a Fischer-Tropsch derived fuel a very low lambda of between 1.05 and 1.2 could be applied without large emissions of carbon monoxide as would be the case when Industrial Gas Oil would be used.
- the blue flame burner using the Fischer-Tropsch fuels is preferably applied for domestic heating, wherein the heat of combustion is used to heat water by indirect heat exchange in so-called boilers.
- the heated water may be used to warm up the house or consumed in for example showers and the like.
- the blue-flame burner is used in (domestic) application wherein more than 3 starts of the burner per hour takes place.
- the use of the present invention is especially suited for such applications because low hydrocarbon and carbon monoxide emissions have been found at the start of the burner running on the Fischer-Tropsch derived fuel.
- the blue flame, burner using the Fischer-Tropsch fuels may advantageously be further used for direct heating of large spaces.
- Such applications are characterized in that the flue gasses are directly supplied to said space to heat up said space. Spaces such a tents and halls are often heated up with such an apparatus.
- gaseous fuels for example natural gas, LPG and the like, are used for this application because the associated flue gasses can be safely supplied to said space.
- a disadvantage of the use of gaseous fuels is however that handling of the pressurized gas containers and combustion equipment requires professional skills in order to operate such an apparatus safely.
- a Fischer-Tropsch derived liquid fuel a comparable flue gas is obtained in the blue flame burner as when a gaseous fuel is used.
- a method is provided wherein a liquid fuel can be applied for direct heating of spaces.
- the application of the liquid Fischer-Tropsch derived fuel makes the use of the apparatus for direct heating much more simple and safe.
- Blue flame burners are often provided with a flame detector.
- suitable detectors are the UV sensors and IR sensors.
- a more preferred detector is the so-called ionisation sensor.
- An ionisation sensor is suitable to monitor burners with intermittent operation as well as continuous operation. The principle of operation of the ionisation flame monitor is based on the rectifying effect of a flame. If a flame is present, a current flows between the burner an the ionisation electrode. This ionisation current is evaluated by the flame monitor to determine if a flame is present.
- ionisation sensors could not be used in combination with a liquid fuel because deposits in the sensor led to false currents in the sensor. Because use of the Fischer-Tropsch derived fuel results in less deposits ionisation sensors can be applied. This is an advantage because these sensors are more readily available than the IR or UV sensors.
- the Fischer-Tropsch derived fuel will comprise a Fischer-Tropsch product, which may be any fraction of the middle distillate fuel range, which can be isolated from the (hydrocracked) Fischer-Tropsch synthesis product.
- Typical fractions will boil in the naphtha, kerosene or gas oil range.
- a Fischer-Tropsch product in the kerosene or gas oil range is used because these fractions are easier to handle in for example domestic environments.
- Such products will suitably comprise a fraction larger than 90 wt % which boils between 160 and 400° C., preferably to about 370° C.
- Fischer-Tropsch derived kerosene and gas oils are described in EP-A-583836, WO-A-9714768, WO-A-9714769, WO-A-011116, WO-A-011117, WO-A-0183406, WO-A-0183648, WO-A-0183647, WO-A-0183641, WO-A-0020535, WO-A-0020534, EP-A-1101813, U.S. Pat. No. 5,766,274, U.S. Pat. No. 5,378,348, U.S. Pat. No. 5,888,376 and U.S. Pat. No. 6,204,426.
- the Fischer-Tropsch product will suitably contain more than 80 wt % and preferably more than 90 wt % iso and normal paraffins and less than 1 wt % aromatics, the balance being naphthenics compounds.
- the content of sulphur and nitrogen will be very low and normally below the detection limits for such compounds. This low content of these elements is due to the specific process wherein the Fischer-Tropsch reaction is performed.
- the content of sulphur will therefore be below 5 ppm and the content of nitrogen will be below 1 ppm.
- the density of the Fischer-Tropsch product will be lower than the conventional mineral derived fuels. The density will be between 0.65 and 0.8 g/cm 3 at 15° C.
- the fuel used in the process of the present invention may also comprise fuel fractions other than the Fischer-Tropsch derived product.
- fractions may be the kerosene or gas oil fractions as obtained in traditional refinery processes, which upgrade crude petroleum feedstock to useful products.
- Preferred non-Fischer-Tropsch fuel components are the ultra low sulphur (e.g. less than 50 ppm sulphur) kerosene or diesel fractions, which are currently on the market.
- non-mineral oil based fuels such as bio-fuels, may also be present in the fuel composition.
- the content of the Fischer-Tropsch derived product in the fuel will be preferably be above 40 wt %, more preferably above 60 wt % and most preferably above 80 wt %. It should be understood that the content of such, currently less available, Fischer-Tropsch product will be optimised, wherein pricing of the total fuel will be balanced with the advantages of the present invention. For some applications fuels fully based on a Fischer-Tropsch product plus optionally some additives may be advantageously used.
- the fuel may also comprise one or more of the following additives.
- Detergents for example OMA 350 as obtained from Octel OY; stabilizers, for example Keropon ES 3500 as obtained from BASF Aktiengesellchaft, FOA 528A as obtained from OCTEL OY; metal-deactivators, for example IRGAMET 30 (as obtained from Speciality Chemicals Inc; (ashless) dispersants, for example as included in the FOA 528 A package as obtained from Octel OY; anti-oxidants; IRGANOX L57 as obtained from Speciality Chemicals Inc; cold flow improvers, for example Keroflux 3283 as obtained from BASF Aktiengesellschaft, R433 or R474 as obtained from Infineum UK Ltd; combustion improver, for example ferrocene, methylcyclopentadienyl-manganese-tricarbonyl (MMT); anti-corrosion: Additin RC 4801 as obtained from Rhein Chemie GmbH, Kerocorr 3232 as obtained from BASF, SARK
- the Fischer-Tropsch derived fuel is colourless and odourless.
- an odour marker as for example applied in natural gas for domestic consumption, may be present in the Fischer-Tropsch derived fuel.
- a colour marker may be present to distinguish the fuel from other non-Fischer-Tropsch derived fuels.
- the total content of the additives may be suitably between 0 and 1 wt % and preferably below 0.5 wt %.
- the NO X content was measured by chemoluminescence.
- FIG. 2 the NO X emission-relative to the energy is shown at different Lambda values for the fuels A-D. The energy in kWh is calculated from the amount of fuel fed to the burner and its caloric value. It is clear that the NO X emissions are lower for the Fischer-Tropsch derived fuels as compared to when a normal gas oil or an ultra low sulphur gas oil is used.
- the carbon monoxide emission was also measured.
- the CO emission relative to the energy is presented for different values of lambda for oils A-D.
Abstract
The invention relates to a process for operating a blue flame burner by burning a Fischer-Tropsch derived fuel. The Fischer-Tropsch fuel contains a Fischer-Tropsch product which boils for more that 90 wt % between 160 and 370° C., contns more than 80 wt % of iso and normal paraffins, less than 1 wt % aromatics, less than 5 ppm sulftir and less that 1 ppm nitrogen and has a density between 0.65 g/cm3 and 0.8 g/cm3 at 15° C.
Description
- The invention is directed to an improved use of a blue flame burner.
- Conventional designs of oil burner assemblies for home heating fuel oils employ a traditional fuel/air mixing process in which the evaporation and combustion of the fuel oil take place simultaneously. In one form of oil burner assembly for home heating fuel oils the fuel oil is sprayed as a hollow cone and air is weakly swirled along a path which is parallel to the axis of a burner blast tube and which passes into the hollow cone so that the trajectories of the fuel oil droplets cross the air flow streamlines. This leads to a rapid, evaporation giving fuel oil rich regions, which in turn ignite under local sub-stoichiometric conditions producing soot, and results in air, pollution as well as well as a waste of a fossil fuel.
- The general pattern of the flame of such an oil burner assembly is one of heterogeneity in terms of fuel concentrations; the pockets of fuel lean mixture give rise to high nitric oxide concentrations from both, the fuel nitrogen and the atmospheric nitrogen, while the pockets of fuel rich mixture give rise to soot. The visible flame from such a system,is yellow. The yellow colour is the visible radiation from the high temperature soot particles and this completely masks other visible radiations as far as the human eye is concerned. These soot particles result from unburnt carbon.
- For complete combustion of the carbon, that is soot-free combustion, the step-wise combustion of carbon to carbon dioxide via the intermediate carbon monoxide stage gives rise to a visible radiation in the blue region of the light spectrum. When this occurs the blue radiation becomes visible in a soot-free or low-luminosity flame, and oil burners for such soot-free flames are known as blue flame burners. U.S. Pat. No. 3,545,902 discloses a blue flame burner.
- Blue flame burners are known to have low NOX emissions. Nevertheless there is a need for even lower NOX emissions. Especially the NOX emissions when petroleum derived fuels such as gas oil or kerosene is used are sometimes too high.
- The object of the present invention is a use of a blue flame burner wherein the emissions of NOX is reduced as compared to the prior art situation.
- This object is achieved by the following use. Use of a Fischer-Tropsch-derived fuel in a blue flame burner.
- Applicants have found that the low NOX emissions of a blue flame burner can be even further reduced when a Fischer-Tropsch derived fuel is used. An even further advantage is that the carbon monoxide emission is reduced. A next advantage is that less odor during start and extinction of the blue flame burner has been observed when using this fuel. This is very advantageous, especially when such a burner is used in a domestic environment.
- Without wishing to be bound by the following theory applicants believe that the lower NOX emissions can be explained by the better evaporation properties of the Fischer-Tropsch derived fuel. The resulting quicker evaporation of the liquid fuel droplets result in a lower local temperatures in the flame, which in turn results in a reduced thermal NOX formation.
- The blue flame burner is characterized in that the combustion of the hydrocarbon fuel to carbon dioxide is performed such that part of the flue gas is recycled to the flame and more suitably to the nozzle of the burner. Recycling part of the flue gas externally of the burner may effect such recirculation of the flue gas. Alternatively recycling may be achieved by swirling the combustible mixture of fuel and oxygen containing gas wherein at the axis of the swirling flame some recirculation of flue gas takes place.
FIG. 1 shows a schematic representation of a blue flame burner with an external recirculation of flue gas. -
FIG. 1 shows a blue flame burner 1 having means 2 to supply a liquid fuel and means 3 to supply an oxygen containing gas. The oxygen containing gas is usually air. Means 4 to mix the fuel and air to form a combustible mixture which is fed to pre-combustionspace 5, which is formed by the interior of tubular part 6. Tubular part 6 is placed co-axial in a largertubular part 7, which forms thefinal combustion space 8. Flue gas is discharged via outlet opening 9 into theoutlet space 10.Openings 11 intubular part 7 serve as means to recycle part of the flue gas to thefinal combustion space 8.Openings 12 in tubular part 6 serve as means to recycle part of the gas present in thefinal combustion space 8 to thepre-combustion space 5. - The operating conditions of the blue flame burner may be the same as the operating conditions used for the state of the art fuels. The proportion of air in excess of that required for stoichiometric combustion is known as the excess air ratio or “lambda”, which is defined as the ratio of total air available for combustion to that required to burn all of the fuel. Preferably the lambda is between 1 and 2 and more preferably between 1 and 1.6. Applicants found that by using a Fischer-Tropsch derived fuel a very low lambda of between 1.05 and 1.2 could be applied without large emissions of carbon monoxide as would be the case when Industrial Gas Oil would be used.
- The blue flame burner using the Fischer-Tropsch fuels is preferably applied for domestic heating, wherein the heat of combustion is used to heat water by indirect heat exchange in so-called boilers. The heated water may be used to warm up the house or consumed in for example showers and the like. More preferably the blue-flame burner is used in (domestic) application wherein more than 3 starts of the burner per hour takes place. The use of the present invention is especially suited for such applications because low hydrocarbon and carbon monoxide emissions have been found at the start of the burner running on the Fischer-Tropsch derived fuel.
- The blue flame, burner using the Fischer-Tropsch fuels may advantageously be further used for direct heating of large spaces. Such applications are characterized in that the flue gasses are directly supplied to said space to heat up said space. Spaces such a tents and halls are often heated up with such an apparatus. Normally gaseous fuels for example natural gas, LPG and the like, are used for this application because the associated flue gasses can be safely supplied to said space. A disadvantage of the use of gaseous fuels is however that handling of the pressurized gas containers and combustion equipment requires professional skills in order to operate such an apparatus safely. By using a Fischer-Tropsch derived liquid fuel a comparable flue gas is obtained in the blue flame burner as when a gaseous fuel is used. Thus a method is provided wherein a liquid fuel can be applied for direct heating of spaces. The application of the liquid Fischer-Tropsch derived fuel makes the use of the apparatus for direct heating much more simple and safe.
- Blue flame burners are often provided with a flame detector. Examples of suitable detectors are the UV sensors and IR sensors. A more preferred detector is the so-called ionisation sensor. An ionisation sensor is suitable to monitor burners with intermittent operation as well as continuous operation. The principle of operation of the ionisation flame monitor is based on the rectifying effect of a flame. If a flame is present, a current flows between the burner an the ionisation electrode. This ionisation current is evaluated by the flame monitor to determine if a flame is present. In some prior art applications ionisation sensors could not be used in combination with a liquid fuel because deposits in the sensor led to false currents in the sensor. Because use of the Fischer-Tropsch derived fuel results in less deposits ionisation sensors can be applied. This is an advantage because these sensors are more readily available than the IR or UV sensors.
- The Fischer-Tropsch derived fuel will comprise a Fischer-Tropsch product, which may be any fraction of the middle distillate fuel range, which can be isolated from the (hydrocracked) Fischer-Tropsch synthesis product. Typical fractions will boil in the naphtha, kerosene or gas oil range. Preferably a Fischer-Tropsch product in the kerosene or gas oil range is used because these fractions are easier to handle in for example domestic environments. Such products will suitably comprise a fraction larger than 90 wt % which boils between 160 and 400° C., preferably to about 370° C. Examples of Fischer-Tropsch derived kerosene and gas oils are described in EP-A-583836, WO-A-9714768, WO-A-9714769, WO-A-011116, WO-A-011117, WO-A-0183406, WO-A-0183648, WO-A-0183647, WO-A-0183641, WO-A-0020535, WO-A-0020534, EP-A-1101813, U.S. Pat. No. 5,766,274, U.S. Pat. No. 5,378,348, U.S. Pat. No. 5,888,376 and U.S. Pat. No. 6,204,426.
- The Fischer-Tropsch product will suitably contain more than 80 wt % and preferably more than 90 wt % iso and normal paraffins and less than 1 wt % aromatics, the balance being naphthenics compounds. The content of sulphur and nitrogen will be very low and normally below the detection limits for such compounds. This low content of these elements is due to the specific process wherein the Fischer-Tropsch reaction is performed. The content of sulphur will therefore be below 5 ppm and the content of nitrogen will be below 1 ppm. As a result of the low contents of aromatics and naphthenics compounds the density of the Fischer-Tropsch product will be lower than the conventional mineral derived fuels. The density will be between 0.65 and 0.8 g/cm3 at 15° C.
- The fuel used in the process of the present invention may also comprise fuel fractions other than the Fischer-Tropsch derived product. Examples of such fractions may be the kerosene or gas oil fractions as obtained in traditional refinery processes, which upgrade crude petroleum feedstock to useful products. Preferred non-Fischer-Tropsch fuel components are the ultra low sulphur (e.g. less than 50 ppm sulphur) kerosene or diesel fractions, which are currently on the market. Optionally non-mineral oil based fuels, such as bio-fuels, may also be present in the fuel composition. The content of the Fischer-Tropsch derived product in the fuel will be preferably be above 40 wt %, more preferably above 60 wt % and most preferably above 80 wt %. It should be understood that the content of such, currently less available, Fischer-Tropsch product will be optimised, wherein pricing of the total fuel will be balanced with the advantages of the present invention. For some applications fuels fully based on a Fischer-Tropsch product plus optionally some additives may be advantageously used.
- The fuel may also comprise one or more of the following additives. Detergents, for example OMA 350 as obtained from Octel OY; stabilizers, for example Keropon ES 3500 as obtained from BASF Aktiengesellchaft, FOA 528A as obtained from OCTEL OY; metal-deactivators, for example IRGAMET 30 (as obtained from Speciality Chemicals Inc; (ashless) dispersants, for example as included in the FOA 528 A package as obtained from Octel OY; anti-oxidants; IRGANOX L57 as obtained from Speciality Chemicals Inc; cold flow improvers, for example Keroflux 3283 as obtained from BASF Aktiengesellschaft, R433 or R474 as obtained from Infineum UK Ltd; combustion improver, for example ferrocene, methylcyclopentadienyl-manganese-tricarbonyl (MMT); anti-corrosion: Additin RC 4801 as obtained from Rhein Chemie GmbH, Kerocorr 3232 as obtained from BASF,
SARKOSYL 0 as obtained from Ciba; re-odorants, for example Compensol as obtained from, Haarman & Reiner; biocides, for example GROTA MAR 71 as obtained from Schuelke & Mayr; lubricity enhancers, for example OLI, 9000 as obtained from Octel; dehazers, for example T-9318 from Petrolite; antistatic agents, for example Stadis 450 from Octel; and foam reducers, for example TEGO 2079 from Goldschmidt. - The Fischer-Tropsch derived fuel is colourless and odourless. For safety reasons an odour marker, as for example applied in natural gas for domestic consumption, may be present in the Fischer-Tropsch derived fuel. Also a colour marker may be present to distinguish the fuel from other non-Fischer-Tropsch derived fuels.
- The total content of the additives may be suitably between 0 and 1 wt % and preferably below 0.5 wt %.
- The invention will now be illustrated with the following non-limiting examples.
- To a blue flame burner of type Gulliver BLU BGI (Riello) as placed in a
Vitola 200 Boiler (Viessmann Werke Gmbh & Co) a Fischer-Tropsch derived kerosene (Oil A), a Fischer-Tropsch gas oil (Oil B), an ultra low sulphur gas oil (Oil D) and a standard industrial gas oil (Oil C) having the properties as listed in Table 1 was fed at different lambda. The oils contained the same standard additive package.TABLE 1 Fischer- Fischer- Tropsch Tropsch kerosene gas oil Reference Reference (A) (B) oil-1 (C) oil-2 (D) Density 734.8 785.2 854.3 846.3 (at 15° C. in kg/m3) Sulphur 0.0005 <0.0005 0.142 0.061 content (wt %) Kinematic 1.246 6.444 3.842 4.621 viscosity at 20° C. (mm2/s) Flash 43 92 64 66 point (° C.) - During the experiment the NOX content was measured by chemoluminescence. In
FIG. 2 the NOX emission-relative to the energy is shown at different Lambda values for the fuels A-D. The energy in kWh is calculated from the amount of fuel fed to the burner and its caloric value. It is clear that the NOX emissions are lower for the Fischer-Tropsch derived fuels as compared to when a normal gas oil or an ultra low sulphur gas oil is used. - The carbon monoxide emission was also measured. In
FIG. 3 the CO emission relative to the energy is presented for different values of lambda for oils A-D.
Claims (13)
1. A process for operating a blue flame burner comprising burning a Fischer-Tropsch derived fuel to produce flue gasses.
2. The process of claim 1 , further comprising operating under conditions such that lambda is between 1 and 1.6
3. The process of claim 2 , wherein lambda is between 1.05 and 1.2.
4. The process of claim 1 , further comprising heating water with the flue gasses by means of indirect heat exchange in a boiler.
5. The process of claim 1 , further comprising heating a space directly with the flue gasses.
6. The process of claims 1, wherein the Fischer-Tropsch derived fuel boils for more than 90 wt % between 160° C. and 400° C.
7. The process of claim 6 , wherein the Fischer-Tropsch derived fuel boils for more than 90 wt % between 160° C. and 370° C.
8. The process of claim 1 , wherein the Fischer-Tropsch derived fuel comprises a Fischer-Tropsch product which contains more than 80 wt % of iso and normal paranffins, less than 1 wt % aromatics, less than 5 ppm sulfur and less than 1 ppm nitrogen and wherein the density of the Fischer-Tropsch product is between 0.65 g/cm3 and 0.8 g/cm3 at 15° C.
9. The process of claims 1, wherein the Fischer-Tropsch derived fuel comprises more than 80 wt % of a Fischer-Tropsch product.
10. The process of claim 9 , wherein the Fischer-Tropsch derived fuel comprises a mineral oil fraction and/or a non-mineral oil fraction
11. The process of claims 1, wherein the Fischer-Tropsch derived fuel comprises one or more additives.
12. The process of claim 11 , wherein the Fischer-Tropsch derived fuel comprises an en odor marker.
13. The process of claim 11 , wherein the Fischer-Tropsch derived fuel comprises a color marker.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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EP02016092.5 | 2002-07-19 | ||
EP02016092 | 2002-07-19 | ||
PCT/EP2003/007860 WO2004009742A1 (en) | 2002-07-19 | 2003-07-18 | Use of a blue flame burner |
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US20050255416A1 true US20050255416A1 (en) | 2005-11-17 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/521,882 Abandoned US20050255416A1 (en) | 2002-07-19 | 2003-07-18 | Use of a blue flame burner |
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US (1) | US20050255416A1 (en) |
EP (1) | EP1523537A1 (en) |
JP (1) | JP2005533234A (en) |
AU (1) | AU2003250108A1 (en) |
CA (1) | CA2493884A1 (en) |
NO (1) | NO20050874L (en) |
WO (1) | WO2004009742A1 (en) |
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US20100092896A1 (en) * | 2008-10-14 | 2010-04-15 | General Electric Company | Method and apparatus for introducing diluent flow into a combustor |
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EP1486555A1 (en) * | 2003-06-04 | 2004-12-15 | Shell Internationale Researchmaatschappij B.V. | Use of low-corrosive fuel compositions in boilers |
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- 2003-07-18 EP EP03765049A patent/EP1523537A1/en not_active Withdrawn
- 2003-07-18 CA CA002493884A patent/CA2493884A1/en not_active Abandoned
- 2003-07-18 AU AU2003250108A patent/AU2003250108A1/en not_active Abandoned
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Cited By (7)
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US20080163614A1 (en) * | 2005-08-12 | 2008-07-10 | Proto-Technics, Inc. | Turbulence Burner With Vortex Structures |
US20080276393A1 (en) * | 2005-11-14 | 2008-11-13 | Russell Bruce M | Light-Emitting Oral Care Implement |
US8429783B2 (en) | 2005-11-14 | 2013-04-30 | Colgate-Palmolive Company | Light-emitting oral care implement |
US8984699B2 (en) | 2005-11-14 | 2015-03-24 | Colgate-Palmolive Company | Light-emitting oral care implement |
US10820686B2 (en) | 2005-11-14 | 2020-11-03 | Colgate-Palmolive Company | Light-emitting oral care implement |
US20100092896A1 (en) * | 2008-10-14 | 2010-04-15 | General Electric Company | Method and apparatus for introducing diluent flow into a combustor |
US9121609B2 (en) * | 2008-10-14 | 2015-09-01 | General Electric Company | Method and apparatus for introducing diluent flow into a combustor |
Also Published As
Publication number | Publication date |
---|---|
NO20050874L (en) | 2005-04-18 |
AU2003250108A1 (en) | 2004-02-09 |
WO2004009742A1 (en) | 2004-01-29 |
EP1523537A1 (en) | 2005-04-20 |
JP2005533234A (en) | 2005-11-04 |
CA2493884A1 (en) | 2004-01-29 |
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