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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0622653 (1975-10-16) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 277 인용 특허 : 0 |
A technique is provided for igniting one in situ oil shale retort with flue gas from an earlier retort. Towards the end of oil shale retorting the flue gas from an in situ retort has a substantial fuel value so that it can be burned for generating heat. This fuel gas is conveyed to the entrance to a
A technique is provided for igniting one in situ oil shale retort with flue gas from an earlier retort. Towards the end of oil shale retorting the flue gas from an in situ retort has a substantial fuel value so that it can be burned for generating heat. This fuel gas is conveyed to the entrance to a second retort and burned to initiate retorting. Even after retorting of the bed of particles in the first retort is completed, a fuel rich flue gas can be obtained and used for ignition of a subsequent retort. In either case the prior retort has a large bed of hot spent oil shale particles through which air is passed to burn carbonaceous material therein. Hot flue gas from the earlier retort can also be used for preheating.
A process for ignitiNg an in situ oil shale retort comprising the steps of: generating a combustible flue gas in a first in situ retort containing a bed of hot spent oil particles by introducing air at the top of the first retort, and withdrawing flue gas from the bottom of the first retort; burning
A process for ignitiNg an in situ oil shale retort comprising the steps of: generating a combustible flue gas in a first in situ retort containing a bed of hot spent oil particles by introducing air at the top of the first retort, and withdrawing flue gas from the bottom of the first retort; burning the combustible flue gas at a top entrance of a second in situ retort containing a bed of unretorted oil shale particles and passing the combustion products downwardly through the bed for heating a portion of the top of the second bed of oil shale particles to the ignition temperature of oil shale particles in the top portion of the bed for establishing a combustion zone at the top of the second bed; and introducing air to the top of the second bed for moving the combustion zone downwardly in the ignited second retort.
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