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    • 29. 发明申请
    • VAPOUR RECOVERY SYSTEM
    • 蒸气回收系统
    • WO1997044411A1
    • 1997-11-27
    • PCT/GB1997001366
    • 1997-05-20
    • FLUOR CORPORATIONANDERSON, Thomas, B.DRUCKER, ElliottROBINSON, John, Dennis
    • FLUOR CORPORATION
    • C10G05/04
    • C10G5/04
    • Apparatus for recovering volatile organic compounds (VOC) from VOC/inert gas mixtures leaving tanker holds during crude oil loading comprises an absorption column (12) in which incoming VOC is absorbed into cold kerosene, a portion of the VOC rich kerosene leaving the absorption column being cooled in a cooler (88) and returned to the absorption column to contact incoming VOC/inert gas mixture and absorb further VOC. The remainder of the rich kerosene leaving the absorption column (12) passes to a buffer tank (34) where it is held. It is then pumped to an elevated pressure distillatin (stripper) column (46), where VOC is separated from the kerosene by conventional rectification. VOC vapour leaving the top of the distillation column is condensed in condenser (72) and held in the VOC reflux tank (76). Liquid VOC from the reflux tank is passed to a crude oil pipeline (82) or to a storage vessel; a portion of the liquid VOC from the reflux tank enters the top of the distillation column to act as reflux. Kerosene leaves the bottom of the distillation column (46) and passes to a storage tank (60) where it is held. From there, it passes through a cooler (66) to the absorption column, to absorb further VOC from incoming VOC/inert gas mixture. The coolers for this lean kerosene and for the rich kerosene which re-enters the absorption column are preferably cooled by the same refrigeration system (68). The buffer and storage tanks are of such a size that the elevated pressure distillation column can run continuously, supplied with VOC rich kerosene from the buffer tank and supplying VOC lean kerosene to the storage tank.
    • 用于在原油装载期间从VOC /惰性气体混合物中回收挥发性有机化合物(VOC)的装置包括吸收塔(12),其中进入的VOC被吸收到冷煤油中,一部分富含VOC的煤油离开吸收塔 在冷却器(88)中冷却并返回到吸收塔以接触进入的VOC /惰性气体混合物并吸收进一步的VOC。 离开吸收塔(12)的富余煤油的剩余部分通入缓冲罐(34),在该缓冲罐中保持。 然后将其泵送到高压蒸馏塔(汽提塔)塔(46),其中通过常规精馏将VOC与煤油分离。 离开蒸馏塔顶部的VOC蒸气在冷凝器(72)中冷凝并保持在VOC回流罐(76)中。 来自回流罐的液体VOC通入原油管道(82)或储存容器; 来自回流罐的液体VOC的一​​部分进入蒸馏塔的顶部以起回流作用。 煤油离开蒸馏塔(46)的底部并进入储存罐(60),在其中保持。 从那里,它通过一个冷却器(66)到吸收塔,从进入的VOC /惰性气体混合物吸收进一步的VOC。 优选地,通过相同的制冷系统(68)冷却用于该贫油煤油和重新进入吸收塔的富煤油的冷却器。 缓冲罐和储罐的尺寸使得高压蒸馏塔可以连续运行,从缓冲罐中提供富含VOC的煤油,并向储罐供应VOC贫煤油。