Method and apparatus for recovering natural gas in a mine
    21.
    发明授权
    Method and apparatus for recovering natural gas in a mine 失效
    矿山天然气回收方法及装置

    公开(公告)号:US4271676A

    公开(公告)日:1981-06-09

    申请号:US88898

    申请日:1979-10-29

    Abstract: Method and apparatus are disclosed for the recovery and removal of natural gas from a mine by liquefying and collecting the gas within the mine, and then transporting the liquified gas to the surface in a mobile tank. Natural gas is withdrawn from bore holes in a coal mine and liquefied using liquid nitrogen. A unique apparatus permits both the liquid nitrogen and the liquefied natural gas to be contained within a same insulated tank, enhancing the portable characteristics. Liquid nitrogen and its vapor are used to cool the natural gas so as to separate water and CO.sub.2. Means are disclosed for controlling the cooling by the cryogenic liquid by regulating the venting flow rate of its vapor in response to the pressure of the liquefied natural gas. The disclosed system eliminates the need for extensive piping and on-site pumping associated with conventional degasification processes.

    Abstract translation: 公开了通过液化和收集矿井内的气体,然后将液化气体输送到移动罐中的表面,从矿井中回收和除去天然气的方法和装置。 天然气从煤矿钻孔中取出,并使用液氮液化。 独特的设备允许液氮和液化天然气都包含在同一绝缘罐内,从而提高便携性。 液态氮及其蒸汽用于冷却天然气以分离水和二氧化碳。 公开了用于通过响应于液化天然气的压力调节其蒸气的排放流量来控制低温液体的冷却的装置。 所公开的系统消除了与常规脱气过程相关的广泛管道和现场泵送的需要。

    Apparatus and method for handling volatile liquids
    22.
    发明授权
    Apparatus and method for handling volatile liquids 失效
    用于处理挥发性液体的装置和方法

    公开(公告)号:US3714790A

    公开(公告)日:1973-02-06

    申请号:US3714790D

    申请日:1971-04-13

    Applicant: FMC CORP

    Inventor: BATTEY R

    Abstract: Hydrocarbon vapors normally released to the atmosphere during the filling of tanks with a relatively volatile liquid are condensed out and recovered as liquid by simultaneously compressing the vapors and saturating the same with vapors of the liquid, followed by a step wherein the compressor effluent is contacted under elevated pressures in a condensation column with a refrigerated stream of the volatile liquid. Said stream is supplied from a relatively small holding tank which is refrigerated and maintained at a relatively constant volume by addition of fresh quantities of the liquid as required.

    Abstract translation: 在通过相对挥发性液体填充罐期间通常释放到大气中的烃蒸气通过同时压缩蒸气并将其与液体的蒸气饱和并冷凝并回收成液体,随后将压缩机流出物接触 在具有挥发性液体的冷冻流的冷凝塔中升高压力。 所述流由相对较小的储存罐供应,其通过根据需要添加新鲜量的液体而被冷藏并保持在相对恒定的体积。

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