IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0427953
(2009-04-22)
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등록번호 |
US-8382468
(2013-02-26)
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우선권정보 |
SE-0800919 (2008-04-22) |
발명자
/ 주소 |
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출원인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
5 |
초록
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Method for combusting a solid phase fuel, where the fuel is caused, by the help of a non-pneumatic feeding element (11), to be fed to an inlet opening (11a) in a burner device (10) having a first inlet (13a) for the oxidant through which an oxidant is caused to flow via a first supply conduit (13).
Method for combusting a solid phase fuel, where the fuel is caused, by the help of a non-pneumatic feeding element (11), to be fed to an inlet opening (11a) in a burner device (10) having a first inlet (13a) for the oxidant through which an oxidant is caused to flow via a first supply conduit (13). The first inlet (13a) for oxidant is caused to be arranged in the form of an opening surrounding the inlet opening (11a), in that the oxidant is caused to flow out through the opening (13a) with a velocity of at least 100 m/s, through a burner pipe (16) and out through a burner orifice (17) to a combustion space (18), so that the oxidant by ejector action causes the fuel to be conveyed through the burner pipe (16) and out through the burner orifice (17).
대표청구항
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1. A method for combusting a solid phase fuel, where the fuel is fed to an inlet opening (11a) of a burner device (10) by way of a non-pneumatic feeding means (11), comprising: flowing oxidant through a first inlet (13a) of the burner device (10) with a velocity of at least 100 m/s, through a burner
1. A method for combusting a solid phase fuel, where the fuel is fed to an inlet opening (11a) of a burner device (10) by way of a non-pneumatic feeding means (11), comprising: flowing oxidant through a first inlet (13a) of the burner device (10) with a velocity of at least 100 m/s, through a burner pipe (16) of the burner device (10), and out through a burner orifice (17) at an end of the burner pipe (16) to a combustion space (18), so that the oxidant by ejector action causes the fuel to be conveyed through the burner pipe (16) and out through the burner orifice (17),wherein the first inlet (13a) is arranged as one of an opening that completely surrounds the inlet opening (11a) or a plurality of holes surrounding the inlet opening (11a),wherein the inlet opening (11a) and the first inlet (13a) debouche in one and the same burner pipe (16),wherein an amount of oxidant per time unit flowed out through the first inlet (13a) is under stoichiometric in relation to an amount of fuel fed to the inlet opening (11a), andwherein the oxidant comprises at least 80 percentages by weight oxygen. 2. The method according to claim 1, wherein the opening (13a) is caused to surround the inlet opening (11a) in a circular symmetric manner. 3. The method according to claim 1, wherein the opening (13a) is caused to surround the inlet opening (11a) in a way which is not circular symmetric, so that the opening (13a) is wider or larger at the lower part of the inlet opening (11a) than at the upper part of the inlet opening (11a). 4. The method according to claim 1, wherein the diameter of the inlet opening (11a) is between ⅙ and ¼ of the length of the burner pipe (16) between the inlet opening (11a) and the burner orifice (17). 5. The method according to claim 1, wherein the oxidant is caused to flow through the first inlet (13a) at a velocity of at least the speed of sound. 6. The method according to claim 1, wherein the burner pipe (16) is caused to be designed with a constriction (16a), so that the inner diameter of the burner pipe (16) at the burner orifice (17) is between 2% and 30% smaller than at the first inlet (13a). 7. The method according to claim 1, wherein additional oxidant is caused to flow, via a second, additional supply conduit (14), out through a second and additional inlet (14a) for oxidant, arranged facing the combustion space (18) and in immediate vicinity of the burner orifice (17). 8. The method according to claim 1, wherein additional oxidant is caused to flow, via a third, additional supply conduit (15), out through a third and additional inlet (15a) for oxidant, arranged facing the combustion space (18) and at a distance from the burner orifice (17). 9. The method according to claim 8, wherein the third inlet (15a) for oxidant is caused to be arranged at an angle in relation to the direction in which the outflowing mixture of fuel and oxidant may flow out of the burner orifice (17), so that the flow of oxidant out from the third inlet (15a) is caused to meet the stream of the mixture at a certain distance from the burner orifice (17). 10. The method according to claim 7, wherein at least one stream of additional oxidant is caused to flow out from an additional inlet (14a; 15a) with a velocity of at least the speed of sound. 11. A device for combustion of a fuel in solid phase, comprising: a burner device (10) having a first supply conduit (13), a first inlet (13a) for oxidant, and an inlet opening (11a) configured to receive fuel from a non-pneumatic feeding means (11); anda supply system (12; 19) arranged to supply oxidant to the burner device (10) via the first supply conduit (13) and the first inlet (13a) for oxidant,wherein the first inlet (13a) for oxidant is arranged in the form of an opening completely surrounding the inlet opening (11a), through which the supply system (12; 19) is arranged to supply the oxidant in a stream at a velocity of at least 100 m/s through a burner pipe (16) and out through a burner orifice (17) to a combustion space (18) thereby to convey the fuel, by ejector action caused by the stream of oxidant, through the burner pipe (16) and out through the burner orifice (17),wherein the inlet opening (11a) and the opening of the first inlet (13a) debouche in one and the same burner pipe (16),wherein an amount of oxidant per time unit flowed out through the first inlet (13a) is under stoichiometric in relation to an amount of fuel fed to the inlet opening (11a), andwherein the oxidant comprises at least 80 percentages by weight oxygen. 12. The device according to claim 11, wherein the diameter of the inlet opening (11a) is between ⅙ and ¼ of the length of the burner pipe (16) between the inlet opening (11a) and the burner orifice (17). 13. The device according to claim 11, wherein the supply system (12; 19) is arranged to control the amount of oxidant per time unit which flows out through the first inlet (13a) so that this is under stoichiometric in relation to the amount of fuel which is fed to the inlet opening (11a), and in that the supply system (12; 19) is arranged to supply an additional stream of oxidant, via at least one additional supply conduit (14; 15), out through at least one additional inlet (14a; 15a) for oxidant, arranged facing the combustion space (18), so that the total amount of supplied oxidant stoichiometrically can correspond to the amount of supplied fuel. 14. The device according to claim 13, wherein an additional inlet (14a; 15a) for oxidant is arranged at an angle in relation to the direction for the outflowing mixture of fuel and oxidant, so that the stream of oxidant from the additional inlet (14a; 15a) is arranged to meet the stream of the mixture at a certain distance from the burner orifice (17). 15. The device according to claim 11, wherein the burner pipe (16) is arranged with a constriction (16a), so that the inner diameter of the burner pipe (16) at the burner orifice (17) is between 2% and 30% smaller than at the first inlet (13a). 16. The device according to claim 12, wherein the supply system (12; 19) is arranged to control the amount of oxidant per time unit which flows out through the first inlet (13a) so that this is under stoichiometric in relation to the amount of fuel which is fed to the inlet opening (11a), and in that the supply system (12; 19) is arranged to supply an additional stream of oxidant, via at least one additional supply conduit (14; 15), out through at least one additional inlet (14a; 15a) for oxidant, arranged facing the combustion space (18), so that the total amount of supplied oxidant stoichiometrically can correspond to the amount of supplied fuel. 17. A device for combustion of a fuel in solid phase, comprising: a burner device (10) having a first supply conduit (13), a first inlet (13a) for oxidant, and an inlet opening (11a) configured to receive fuel from a non-pneumatic feeding means (11); anda supply system (12; 19) arranged to supply oxidant to the burner device (10) via the first supply conduit (13) and the first inlet (13a) for oxidant,wherein the first inlet (13a) for oxidant is formed of a plurality of holes surrounding the inlet opening (11a), through which the supply system (12; 19) is arranged to supply the oxidant in a stream at a velocity of at least 100 m/s through a burner pipe (16) and out through a burner orifice (17) to a combustion space (18) thereby to convey the fuel, by ejector action caused by the stream of oxidant, through the burner pipe (16) and out through the burner orifice (17),wherein the inlet opening (11a) and the opening of the first inlet (13a) debouche in one and the same burner pipe (16),wherein an amount of oxidant per time unit flowed out through the first inlet (13a) is under stoichiometric in relation to an amount of fuel fed to the inlet opening (11a), andwherein the oxidant comprises at least 80 percentages by weight oxygen.
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