IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0534905
(2000-03-23)
|
발명자
/ 주소 |
- Hoke, Jr., Bryan Clair
- Lievre, Kevin Alan
- Slavejkov, Aleksandar Georgi
- Inskip, Julian Leonard
- Marchiando, Robert Dean
- Eng, Robert Michael
|
출원인 / 주소 |
- Air Products and Chemicals, Inc.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
33 인용 특허 :
18 |
초록
▼
A process and furnace for melting glass is set forth wherein the majority of the combustion energy over the melting zone of the furnace is provided by oxy-fuel combustion while a majority of the combustion energy over the fining zone of the furnace is provided by air-fuel combustion. In many cases,
A process and furnace for melting glass is set forth wherein the majority of the combustion energy over the melting zone of the furnace is provided by oxy-fuel combustion while a majority of the combustion energy over the fining zone of the furnace is provided by air-fuel combustion. In many cases, it will be preferable to provide greater than 70% and up to and including 100% of the combustion energy over the melting zone by oxy-fuel combustion and greater than 70% and up to and including 100% of the combustion energy over the fining zone by air-fuel combustion. By proper tailoring of the combustion space atmosphere through oxy-fuel and air-fuel firing, the present invention can result in an improvement in glass productivity and quality. The present invention can be applied in the construction of a new furnace or can be applied to existing air-fuel furnaces.
대표청구항
▼
A process and furnace for melting glass is set forth wherein the majority of the combustion energy over the melting zone of the furnace is provided by oxy-fuel combustion while a majority of the combustion energy over the fining zone of the furnace is provided by air-fuel combustion. In many cases,
A process and furnace for melting glass is set forth wherein the majority of the combustion energy over the melting zone of the furnace is provided by oxy-fuel combustion while a majority of the combustion energy over the fining zone of the furnace is provided by air-fuel combustion. In many cases, it will be preferable to provide greater than 70% and up to and including 100% of the combustion energy over the melting zone by oxy-fuel combustion and greater than 70% and up to and including 100% of the combustion energy over the fining zone by air-fuel combustion. By proper tailoring of the combustion space atmosphere through oxy-fuel and air-fuel firing, the present invention can result in an improvement in glass productivity and quality. The present invention can be applied in the construction of a new furnace or can be applied to existing air-fuel furnaces. w when the tapped airflow and the compressed ambient airflow are combined. 12. The process according to claim 1, wherein the tapped airflow is guided in heat-exchanging manner past a separate cooling airflow and in the process, undergo a relatively great pressure change of roughly Δp=0.05 bar to Δp=0.3 bar. 13. The process according to claim 1, wherein the compressed ambient airflow is guided in heat-exchanging manner past a separate cooling airflow and in the process, undergoes a relatively small pressure change of roughly Δp=0.01 bar to Δp=0.05 bar. 14. The process according to claim 12, wherein at first the compressed ambient airflow and then the tapped airflow are guided in heat-exchanging manner past the separate cooling airflow. 15. The process according to claim 12, wherein water separated from the tapped airflow and/or the mixed airflow and/or the compressed ambient airflow is fed into the separate cooling airflow for evaporation. 16. The process according to claim 1, wherein said mixed airflow's expansion takes place in two steps and between the two expansion steps the mixed airflow is guided in heat-exchanging manner past the tapped airflow to cool the tapped airflow. 17. The process according to claim 16, wherein after the mixed airflow's expansion, water is removed from the mixed airflow. 18. The process according to claim 1, wherein said step of compressing said ambient airflow and said step of expanding said mixed airflow each take place in two steps, in connection with which, for each said compression step energy is utilized regeneratively from only one of said two expansion steps in each case. 19. An air-conditioning system for preparing pressurized air for air-conditioning of a space, comprising: at least one compressor installation contacting ambient air and compressing a partial airflow originating from the ambient air to form a compressed ambient airflow to a pressure in the range of 0.8 bar to 4 bar, a mixing element in which the compressed ambient airflow is combined with a tapped airflow tapped from a power unit to form a mixed airflow, at least one turbine installation for dropping the pressure of the mixed airflow to a lower pressure level and for cooling off the mixed airflow, and at least one heat-exchanger receiving said tapped airflow and receiving said mixed airflow. 20. The air-conditioning system according to claim 19, wherein said at least one heat-exchanger is positioned after said at least one turbine to receive the mixed airflow after the expansion of the mixed airflow. 21. The air-conditioning system according to claim 19, wherein said at least one heat-exchanger is positioned before said at least one turbine to receive the mixed airflow before the expansion of the mixed airflow. 22. The air-conditioning system according to claim 19, wherein said at least one turbine installation has at least one turbine wheel and the compressor installation has at least one compressor wheel, with both wheels on a shared shaft. 23. The air-conditioning system according to claim 19, wherein a motor is provided for supplying system-extraneous energy for the compressor installation. 24. The air-conditioning system according to claim 19, wherein the compressor installation and said at least one turbine installation have a ratio of conveyed mass tapped airflow to conveyed mass ambient airflow which is in the 99.9:0.1 to 50:50 range. 25. The air-conditioning system according to claim 24, wherein the ratio of mass tapped airflow to mass ambient airflow is roughly 65:35. 26. The air-conditioning system according to claim 19, wherein a water separator is arranged between the mixing element and said at least one turbine installation. 27. The air-conditioning system according to claim 19, wherein in a flow direction, before the mixing element, a water separator is provided for separating water from the compressed ambient airflow and/or the tapped airflow. 28. The air-conditioning system according to claim 19, wherein a pressure of roughly 3.4 bar ensues for the mixed airflow at the mixing element. 29. The air-conditioning system according to claim 19, wherein the tapped airflow and the ambient airflow are guided by a first and a second heat-exchanger past a cooling airflow, in connection with which the first heat-exchanger serves to cool the compressed ambient airflow and is arranged in the flow direction of the cooling airflow before the second heat-exchanger to cool the tapped airflow. 30. The air-conditioning system according to claim 29, wherein a water injection device is provided with which water separated from the tapped airflow and/or from the mixed airflow and/or from the compressed ambient airflow is guided, before the first heat-exchanger, into the cooling airflow for evaporation there. 31. The air-conditioning system according to claim 20, wherein said at least one turbine installation comprises two turbine stages and the at least one heat-exchanger is arranged between the two turbine stages. 32. The air-conditioning system according to claim 31, wherein a water separator is arranged between the two turbine stages. 33. The air-conditioning system according to claim 19, wherein said at least one compressor installation includes two compressor wheels on separate shafts and each said compressor wheel is mounted, with only one turbine wheel in each case, on a shared shaft. 34. The air-conditioning system according to claim 19, wherein one of the shafts is additionally equipped with a motor that can also act as a generator. 35. The air-conditioning system according to claim 34, wherein in the flow direction of the ambient airflow and behind the compressor installation, a surge valve is provided in order to blow off largely uncompressed ambient air sucked in. 36. The air-conditioning system according to claim 19, wherein a bypass valve is provided in order, during flight, to mix the compressed ambient airflow into the tapped airflow only after its pressure has dropped. 37. The air-conditioning system according to claim 19, wherein a bypass valve is provided in order, during flight, to direct the tapped airflow past the mixing element directly to the expansion installation.
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