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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0592376 (1984-03-22) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 304 인용 특허 : 7 |
Product yield and quality is increased during in situ retorting of oil shale by pulsed combustion in which the flow of feed gas to the flame front is intermittently stopped while continuously retorting the oil shale. In the process, a water purge is injected into the retort between pulses of feed ga
Product yield and quality is increased during in situ retorting of oil shale by pulsed combustion in which the flow of feed gas to the flame front is intermittently stopped while continuously retorting the oil shale. In the process, a water purge is injected into the retort between pulses of feed gas to enhance transfer of sensible heat from the combustion zone to the retorting zone and enlarge the separation between the combustion zone and the advancing front of the retorting zone. Retort water produced during retorting can be used as part of the water purge and/or feed gas for process economy and efficiency.
A process for retorting oil shale, comprising the steps of: heating a portion of a rubblized mass of oil shale in a retorting zone of an underground retort to a retorting temperature to liberate shale oil and retort water from said oil shale leaving retorted shale containing residual carbon; combust
A process for retorting oil shale, comprising the steps of: heating a portion of a rubblized mass of oil shale in a retorting zone of an underground retort to a retorting temperature to liberate shale oil and retort water from said oil shale leaving retorted shale containing residual carbon; combusting said residual carbon in said oil shale in a combustion zone behind said retorting zone in said underground retort with a flame front fed by an oxgen-containing, combustion-sustaining, feed gas to provide a substantial portion of said heating, said flame front advancing generally in the direction of flow of said feed gas; injecting a purge liquid comprising retort water in the absence of said oxygen-containing, combustion-sustaining, feed gas into said underground retort to quench said flame front while substantially stopping and blocking the flow of said oxygen-containing, combustion-sustaining, feed gas into said retort while simultaneously continuing to libcrate shale oil and retort water in said underground retort; said retort water liberated from said retort and injected into said underground retort as said purge liquid, comprising raw, retorted and spent oil shale particulates ranging in size from less than 1 micron to 1000 microns, water, shale oil, phenols, organic carbon, ammonia, sodium, iron, sulfur, magnesium, calcium, nitrogen, nickel, copper, phosphorus, zinc, and arsenic; reigniting said flame front with said oxygen-containing, combustion-sustaining, feed gas by feeding said oxgen-containing feed gas into said retort in the absence of said retort water purge liquid while simultaneoulsy substantially stopping and preventing the flow of said retort water purge liquid into said retort; and withdrawing said liberated shale oil and retort water from said underground retort.
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