EP1218471A1 - Method and device for extracting combustion gases with a high calorific value - Google Patents
Method and device for extracting combustion gases with a high calorific valueInfo
- Publication number
- EP1218471A1 EP1218471A1 EP00969430A EP00969430A EP1218471A1 EP 1218471 A1 EP1218471 A1 EP 1218471A1 EP 00969430 A EP00969430 A EP 00969430A EP 00969430 A EP00969430 A EP 00969430A EP 1218471 A1 EP1218471 A1 EP 1218471A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- solid particles
- bed
- heating
- area
- gasification
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/54—Gasification of granular or pulverulent fuels by the Winkler technique, i.e. by fluidisation
- C10J3/56—Apparatus; Plants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/482—Gasifiers with stationary fluidised bed
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2200/00—Details of gasification apparatus
- C10J2200/09—Mechanical details of gasifiers not otherwise provided for, e.g. sealing means
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0973—Water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/12—Heating the gasifier
- C10J2300/1246—Heating the gasifier by external or indirect heating
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/12—Heating the gasifier
- C10J2300/1261—Heating the gasifier by pulse burners
Definitions
- the invention relates to a method for obtaining high-calorific fuel gases and an apparatus for performing the method.
- a major advantage of gasification over combustion is that the pollutants contained in the starting substance are converted into constituents or into relatively simple chemical compounds in a reducing atmosphere.
- the gas volumes are significantly smaller compared to combustion, so that gas cleaning in gasification compared to combustion can be carried out more easily and cost-effectively with the same objective.
- the gasification of solid, pasty or liquid fuels with the gasification medium air is technically the simplest process and leads to partial oxidation.
- the calorific value of the gas produced is lower than that of the fuel used.
- the Gasification temperatures are typically in the range between 600 ° C and 900 ° C. At these temperatures, tars are produced to a large extent. The method has not been used on a large scale so far, since the removal of the tars from the gas has so far not been adequately controlled for small gasifiers
- the gasification of solid, pasty or liquid fuels with the gasification medium oxygen leads, like the air gasification, to a partial oxidation with a reduction in the calorific value.
- the gasification temperatures are typically around 1600 ° C, so that tar formation is excluded the generation of the required oxygen is associated with high costs and puts too much strain on business calculations.
- Oxygen gasification leads to smaller gas quantities than air gasification, since the gasification medium does not enter an inert nitrogen component
- the gasification of solid, pasty or liquid fuels with the gasification medium water vapor leads to a gas that has a higher calorific value than the fuel originally used.
- the gasification reactor must therefore be supplied with heat from the outside.
- the gasification temperatures are typically between 600 ° C and 900 ° C of tar possible
- the potential is lower than in air gasification.
- Large-scale use has not yet been achieved because, above all, the problem of heat input into the reactor has not been adequately solved.
- the amount of gas in water vapor gasification is between that of air and oxygen gasification. This is then justifies that in water vapor gasification the carbon of the fuel is oxidized to carbon monoxide or carbon dioxide by the oxygen of the water vapor, whereby additional hydrogen is formed.
- the hydrogen generation potential of the water vapor gasification is thus considerably higher than that of air or Sa. uerstoffvergasung
- the combination of an auto- and allothermal process means that the amount of gas rises sharply due to the nitrogen content that is introduced with the air for the partial combustion.
- the partial pressures of the useful gases thus decrease, which adversely affects the subsequent gas cleaning and gas aftertreatment.
- a fluidized bed is a technology that has been tried and tested and widely used for many years. Areas of application are e.g. drying and burning solid materials or sludge.
- the basis of every fluidized bed process is a reactor in which a solids inventory is loosened by inflow from below to such an extent that the individual particles begin to float in the air; the solids inventory is fluidized.
- Partition areas of different fluidization are formed so that there is a circulation of bed material in a stationary bed
- EP 0302 849 A circulating fluidized bed, which is a further development of DE 28 36 531, but due to its size is more pronounced of a stationary than a circulating fluidized bed
- the inventive method and the inventive device are not limited to special heating devices, but instead allow the use of any heating devices, in particular tubular heat exchangers, advantageously no fuel particles get from the reducing zone into an oxidizing zone.
- the design of the reaction space can be carried out independently of the geometrical specifications for the heating, so that the overall size of the device according to the invention can be optimized.
- the descending first bed is loosened or slightly fluidized by injection of a gas, which advantageously prevents undesired agglomeration of the solid particles and supports the transport of the bed material.
- the descending first bed is indirectly using a heat exchanger , through which a heating medium flows, heated
- the heating medium can flow pulsatingly when the heat is given off to the descending first bed in the heat exchanger. In this way, the heat transfer from the heat exchanger to the descending first bed is improved
- the gasification can take place under pressure or under atmospheric conditions.
- the carbon-containing substances can consist of liquid, pasty or solid substances, in particular of coke, petroleum, biomass or waste materials.
- the method according to the invention therefore permits the processing of a wide variety of carbon-containing substances.
- water vapor is used as the gasifying agent
- the heating area and the reaction area can be separated by a different fluidization of the fluidized bed, the different fluidization causing the bed material to circulate around one or more essentially horizontal axes.
- the essentially horizontal axes can be closed in a ring
- Embodiment of the device according to the invention is particularly characterized by a compact design.
- the heating area and the reaction area are separated by a wall Safe separation of the heating area from the reaction area through constructive measures
- the device for the transfer of the heated solid parts can be a wall opening or a pipeline.
- this device can be provided for the transfer of the heated solid particles in a lower area of the heating area.
- this device has a nozzle base, with the aid of which the solid particles in the heating area can be easily fluidized
- the indirect heat supply device is at least one heat exchanger through which a heating medium can flow, which is provided in or on the heating area.
- the use of heat exchangers as heat supply device simplifies the construction of the reactor Heating medium flows in a pulsating manner when the heat is released to the heating area. This advantageously improves the heat transfer from the heat exchanger to the heating area.
- the resonance tube can be connected to a combustion chamber for generating resonance. The desired resonance can also be generated with the aid of an acoustic oscillator which is arranged separately from the combustion chamber.
- the device for producing the ascending, fluidizing fluidized bed is a nozzle base provided in a lower region of the reaction region.
- a nozzle base offers the advantage of uniformly spraying the fluidizing medium into the reaction region
- the device for separating the gases formed during gasification from the solid particles can be a cyclone.
- the device for separating has internals for forming a sharp deflection of the gas flow, at which the gas and solid particle flow separate, whereby a duct for gas discharge and the heating area connect to the internals.
- a device for transferring the solid particles from the reaction area into the heating area can be provided to form a solid particle circuit.
- This device can be a wall opening or a pipeline. This device is preferably in an upper area the reaction area provided
- the feed area for the carbon-containing substances can open into the heating area.
- a feed device for the carbon-containing substances can also open into the reaction area
- FIG. 1 shows a cross section through an embodiment of the device according to the invention, in which the device for separating the gases from the solid particles has internals, and
- FIG. 2 shows a cross section through another embodiment of the device according to the invention, in which the device for separating the gases from the solid particles is a cyclone
- the embodiment of the device according to the invention shown in FIG. 1 comprises a reaction area 3, in which carbon-containing substances are gasified.
- the carbon-containing substances are located in an ascending, fluidized fluidized bed 2, which is generated with the aid of the device 4 in the reaction area 3, in the lower area of the
- the device 4 provided in the reaction area 3 can be, for example, an open or closed shower base through which the fluidizing medium water vapor is blown in.
- the water vapor can be mixed with gases.
- the shower base 15 delimits the reaction area 3, in which the fluidized bed 2 is formed, next to or below the nozzle base 15 a fume cupboard, not shown in FIG. 1, from which, for example, bed material, stored matter from the fuel, ash and unreacted fuel components can be drawn off.
- Fume can be emitted into the fume cupboard, which on the one hand facilitates the fume cupboard and on the other hand a subsequent reaction of residual constituents of the fuel ensured
- the embodiment shown also comprises a heating area 6, which is separated from the reaction area 3 by a device 9.
- a descending bed 1 made of solid particles is formed in the heating area 6
- Dusenteil 22 may be arranged, flows through the steam that to Improvement of the mass transfer loosened the bed material of the heating zone or weakly fluidized
- the heating zone 6 is a means 8 for the indirect heat supply arranged
- These Warmezuchtein ⁇ chtung 8 may for example be one or more heat exchangers, it is clear that the present invention is not 'in the manner shown in Figure 1 special arrangement of the heat exchanger 12 is limited, but that other arrangements, for example on the wall of the heating area 6, are also conceivable.
- a flat heat exchanger which is integrated, for example, into the wall of the heating area 6, can be used
- the heat exchanger 12 provided in the heating area can partially consist of resonance tubes 13, in which the heating medium flows in a pulsating manner when the heat is released into the heating area 6.
- the resonance tubes 13 are connected to a combustion chamber (not shown) or another resonance generator to generate the resonance oscillation of the heating medium is done directly by burning a flammable substance with oxygen-containing gas
- the solid particles are heated up separately from the gasification taking place in the reaction space 3. Due to the weak fluidization of the heating area, a slow descending bed 1 is formed there, while due to the strong fluidization of the reaction area 3 there is a rapidly rising fluidized bed 2 forms The arrangement of the heat exchanger 12 in the slow descending bed 1 reduces the strong mechanical abrasion of the heat exchanger which has hitherto taken place in the prior art. In addition, the heat exchanger 12 is less exposed to corrosion in the heating area than in the reaction area 6, which means that this means that the reactor has a longer service life
- the heating area 6 is connected to the reaction area 3 via a device 7, with the aid of which the solid particles heated in the heating area 6 are transferred into the reaction area 3.
- this device 7 is shown as Wall opening 10 formed.
- This device 7 can also be designed, for example, as a pipeline.
- the device 7 for transferring the heated solid particles can have a nozzle floor 11. With the help of this nozzle floor 11 the solid particles can be loosened or easily fluidized.
- the nozzle base 15 used to produce the rising, fluidized fluidized bed 2 can be used as the nozzle base 11, it being necessary to note that in the reaction area 3 there is more fluidization than in the heating area 6
- a device 16 is provided in the upper area of the reaction area 3 for returning the solid particles from the reaction area 3 to the heating area 6.
- this device 16 can be a wall opening 17.
- This device is also conceivable 16 to be designed as a pipeline
- the device 5 for separating the gases formed during the gasification from the solid particles and for removing these gases are, in the embodiment shown in FIG. 1, internals 18 and 19.
- the internals 18 and 19 cause a sharp deflection of the flow to which the solid particles cannot follow gas flow and solid particle flow thus separate at the internals
- the gas flow is discharged via the gas path 20, through which the internals 18 and 19 are separated.
- the solid particle stream rains in the heating area 6, which is located below the internals 18 and 19
- a feed device 21 for the carbon-containing substances flows into the heating area 6.
- the fuel can either be pressed into the area of the bed 1 or thrown onto the bed 1 from above. It is also possible to provide a further feed device that mouths into the reaction area 3
- the bed material is separated from the gas stream in a cyclone and fed back to the lower region of the rising bed 2 via the descending bed 1.
- the gas stream flows tangentially via the tube 23 into the separating space designed as a cyclone 5 a
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19948332A DE19948332B4 (en) | 1999-10-07 | 1999-10-07 | Method and apparatus for obtaining high calorific fuels |
DE19948332 | 1999-10-07 | ||
PCT/EP2000/009767 WO2001025371A1 (en) | 1999-10-07 | 2000-10-05 | Method and device for extracting combustion gases with a high calorific value |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1218471A1 true EP1218471A1 (en) | 2002-07-03 |
EP1218471B1 EP1218471B1 (en) | 2005-02-02 |
Family
ID=7924827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00969430A Expired - Lifetime EP1218471B1 (en) | 1999-10-07 | 2000-10-05 | Method and device for producing fuel gases with a high calorific value |
Country Status (9)
Country | Link |
---|---|
US (3) | US20020148597A1 (en) |
EP (1) | EP1218471B1 (en) |
AT (1) | ATE288466T1 (en) |
AU (1) | AU7915000A (en) |
DE (2) | DE19948332B4 (en) |
DK (1) | DK1218471T3 (en) |
ES (1) | ES2235961T3 (en) |
PT (1) | PT1218471E (en) |
WO (1) | WO2001025371A1 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004024620A2 (en) * | 2002-09-10 | 2004-03-25 | Manufacturing And Technology Conversion International, Inc. | Steam reforming process and apparatus |
CA2496839A1 (en) | 2004-07-19 | 2006-01-19 | Woodland Chemical Systems Inc. | Process for producing ethanol from synthesis gas rich in carbon monoxide |
WO2007019091A2 (en) * | 2005-08-08 | 2007-02-15 | Eli Lilly And Company | Assembly for filling a container of a delivery device with a pharmaceutical |
ES2539761T3 (en) * | 2006-04-05 | 2015-07-03 | Woodland Biofuels Inc. | System and method to convert biomass into ethanol through synthesis gas |
US8690977B2 (en) | 2009-06-25 | 2014-04-08 | Sustainable Waste Power Systems, Inc. | Garbage in power out (GIPO) thermal conversion process |
DE102009039920A1 (en) | 2009-09-03 | 2011-03-10 | Karl-Heinz Tetzlaff | Method and apparatus for using oxygen in the steam reforming of biomass |
DE102009039837A1 (en) * | 2009-09-03 | 2011-03-10 | Karl-Heinz Tetzlaff | Electric heater for a fluidized bed reactor for the production of synthesis gas |
DE102009039836A1 (en) * | 2009-09-03 | 2011-03-10 | Karl-Heinz Tetzlaff | Synthesis gas reactor with heated coke cloud |
FI122040B (en) * | 2009-11-10 | 2011-07-29 | Foster Wheeler Energia Oy | Process and arrangement for feeding fuel into a boiler with circulating fluidized beds |
FI20096170A (en) * | 2009-11-10 | 2011-05-11 | Foster Wheeler Energia Oy | Method and apparatus for feeding fuel into a circulating fluidized boiler |
FI123548B (en) | 2010-02-26 | 2013-06-28 | Foster Wheeler Energia Oy | Arrangement in a fluidized bed reactor |
DE102011015807A1 (en) | 2011-04-01 | 2012-10-04 | H S Reformer Gmbh | Increase the efficiency of heating allothermal reactors |
US8968693B2 (en) * | 2012-08-30 | 2015-03-03 | Honeywell International Inc. | Internal cyclone for fluidized bed reactor |
US9725663B2 (en) | 2013-01-22 | 2017-08-08 | Themochem Recovery International, Inc. | Integrated two-stage thermochemical heat pipe reactor having a partitioned vessel |
ITUA20162165A1 (en) * | 2016-04-04 | 2016-07-04 | Enrico Bocci | Internal Circulating Dual Bubbling Fluidized Bed Gasifier |
IT202200007628A1 (en) | 2022-04-15 | 2023-10-15 | Walter Tosto S P A | INTEGRATED GASIFIER/CARBONATOR, COMBUSTOR/CALCINATOR AND AIR CONDITIONING SYSTEM FOR THE PRODUCTION FROM SYNGAS SOLID FUELS WITH HIGH HYDROGEN CONTENT FOR LOW TEMPERATURE USES WITH NEUTRAL/NEGATIVE CO2 EMISSIONS |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
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US2588075A (en) * | 1945-12-18 | 1952-03-04 | Standard Oil Dev Co | Method for gasifying carbonaceous fuels |
US2560356A (en) * | 1947-07-01 | 1951-07-10 | Shell Dev | Fluidized powder flow and control |
US2591595A (en) * | 1949-09-29 | 1952-04-01 | Standard Oil Dev Co | Method for controlling the temperature of exothermic reactions such as the gasification of carbonaceous solids |
JPS501700B1 (en) * | 1969-06-21 | 1975-01-21 | ||
GB1577717A (en) * | 1976-03-12 | 1980-10-29 | Mitchell D A | Thermal reactors incorporating fluidised beds |
IE47243B1 (en) * | 1977-08-19 | 1984-01-25 | Flameless Furnaces Ltd | Improvements in or relating to the feed of material to fluidised beds |
US4154581A (en) * | 1978-01-12 | 1979-05-15 | Battelle Development Corporation | Two-zone fluid bed combustion or gasification process |
DE3222653C1 (en) * | 1982-06-16 | 1983-04-21 | Kraftwerk Union AG, 4330 Mülheim | Process for converting carbonaceous fuel into a combustible product gas |
US4515659A (en) * | 1982-09-30 | 1985-05-07 | Ford Motor Company | Pyrolytic conversion of plastic and rubber waste to hydrocarbons with basic salt catalysts |
DE3320049A1 (en) * | 1983-06-03 | 1984-12-06 | Inter Power Technologie GmbH, 6600 Saarbrücken | METHOD FOR OPERATING A FLUIDIZED BURN FIRING |
SE460146B (en) * | 1986-08-14 | 1989-09-11 | Goetaverken Energy Syst Ab | APPLICATION FOR COMBUSTION PLANT WITH CIRCULATING FLUID BED |
DE3635215A1 (en) * | 1986-10-16 | 1988-04-28 | Bergwerksverband Gmbh | METHOD FOR ALLOTHERMAL CARBON GASIFICATION AND FLUID BED GAS GENERATOR FOR CARRYING OUT THE METHOD |
AT401419B (en) * | 1987-07-21 | 1996-09-25 | Sgp Va Energie Umwelt | FLUIDIZED LAYER METHOD FOR THE GASIFICATION AND COMBUSTION OF FUELS AND DEVICE FOR IMPLEMENTING IT |
EP0324957A1 (en) * | 1987-12-22 | 1989-07-26 | Waagner-Biro Aktiengesellschaft | Process and apparatus for the thermal production of chemical raw materials |
DK633488D0 (en) * | 1988-11-11 | 1988-11-11 | Risoe Forskningscenter | REACTOR |
US5059404A (en) * | 1989-02-14 | 1991-10-22 | Manufacturing And Technology Conversion International, Inc. | Indirectly heated thermochemical reactor apparatus and processes |
TW245651B (en) * | 1994-02-24 | 1995-04-21 | Babcock & Wilcox Co | Black liquor gasifier |
DE19736867C2 (en) * | 1997-08-25 | 2003-01-16 | Montan Tech Gmbh | Process for the allothermal gasification of organic substances and mixtures of substances |
US7087097B1 (en) * | 1999-06-09 | 2006-08-08 | Technische Universitat Munchen Lehrstuhl Fur Thermische Kraftanlagen | Facility for the gasification of carbon-containing feed materials |
-
1999
- 1999-10-07 DE DE19948332A patent/DE19948332B4/en not_active Expired - Fee Related
-
2000
- 2000-10-05 AT AT00969430T patent/ATE288466T1/en active
- 2000-10-05 AU AU79150/00A patent/AU7915000A/en not_active Abandoned
- 2000-10-05 PT PT00969430T patent/PT1218471E/en unknown
- 2000-10-05 WO PCT/EP2000/009767 patent/WO2001025371A1/en active Application Filing
- 2000-10-05 DK DK00969430T patent/DK1218471T3/en active
- 2000-10-05 DE DE50009434T patent/DE50009434D1/en not_active Expired - Lifetime
- 2000-10-05 ES ES00969430T patent/ES2235961T3/en not_active Expired - Lifetime
- 2000-10-05 EP EP00969430A patent/EP1218471B1/en not_active Expired - Lifetime
-
2002
- 2002-04-05 US US10/116,038 patent/US20020148597A1/en not_active Abandoned
-
2005
- 2005-02-18 US US11/060,322 patent/US7094264B2/en not_active Expired - Fee Related
-
2006
- 2006-07-07 US US11/482,626 patent/US7507266B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0125371A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1218471B1 (en) | 2005-02-02 |
DE19948332A1 (en) | 2001-05-03 |
US20050166457A1 (en) | 2005-08-04 |
US20020148597A1 (en) | 2002-10-17 |
WO2001025371A1 (en) | 2001-04-12 |
US7507266B2 (en) | 2009-03-24 |
DE50009434D1 (en) | 2005-03-10 |
ATE288466T1 (en) | 2005-02-15 |
DE19948332B4 (en) | 2005-09-22 |
ES2235961T3 (en) | 2005-07-16 |
US20060265955A1 (en) | 2006-11-30 |
DK1218471T3 (en) | 2005-03-14 |
PT1218471E (en) | 2005-05-31 |
US7094264B2 (en) | 2006-08-22 |
AU7915000A (en) | 2001-05-10 |
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