Method for inhibiting the plugging of conduits by gas hydrates
    32.
    发明授权
    Method for inhibiting the plugging of conduits by gas hydrates 失效
    阻止气体水合物堵塞导管的方法

    公开(公告)号:US5879561A

    公开(公告)日:1999-03-09

    申请号:US636618

    申请日:1996-04-23

    CPC classification number: C09K8/52 C10L3/00 F17D1/05 C09K2208/22 Y10S585/95

    Abstract: A method for inhibiting the plugging of a conduit, the conduit containing a flowing mixture comprising an amount of hydrocarbons having from one to eight carbon atoms and an amount of water wherein the amounts of hydrocarbons and water could form hydrates at conduit temperatures and pressures, the method comprising the steps of:adding to the mixture an amount of a hydrate formation inhibitor component of the formula ##STR1## wherein two of R.sub.1 -R.sub.4 are independently normal or branched alkyls having 4 or 5 carbon atoms,two of R.sub.1 -R.sub.4 are independently representing organic moieties having at least 8 carbon atoms,A represents a nitrogen or phosphorus atom, andY represents an anion;the amount of the hydrate formation inhibitor component being effective to inhibit formation of hydrates in the mixture at conduit temperatures and pressures; andflowing the mixture containing the hydrate formation inhibitor component through the conduit.

    Abstract translation: 一种用于抑制管道堵塞的方法,该管道含有一定流量的混合物,该混合物包含一定量的具有1-8个碳原子的烃和一定量的水,其中烃和水的量可以在管道温度和压力下形成水合物, 方法包括以下步骤:向混合物中加入一定量的式“IMAGE”的水合物形成抑制剂组分,其中R 1 -R 4中的两个独立地为具有4或5个碳原子的正或支链烷基,R 1 -R 4中的两个独立地为 表示具有至少8个碳原子的有机部分,A表示氮或磷原子,Y表示阴离子; 水合物形成抑制剂组分的量在管道温度和压力下有效抑制混合物中水合物的形成; 并使含有水合物形成抑制剂组分的混合物通过导管流动。

    Pipeline gas pressure reduction with refrigeration generation
    35.
    发明授权
    Pipeline gas pressure reduction with refrigeration generation 失效
    管道气减压与制冷发电

    公开(公告)号:US4522636A

    公开(公告)日:1985-06-11

    申请号:US578074

    申请日:1984-02-08

    CPC classification number: F25B9/06 F17D1/05 F17D1/07

    Abstract: The high pressure of pipeline gas is reduced to the low pressure of a distribution system with simultaneous generation of refrigeration by passing the gas through two successive centrifugal compressors driven by two turbo-expanders in which the compressed gas is expanded to successively lower pressures. Refrigeration is recovered from the gas as it leaves each turbo-expander. Methanol is injected into the pipeline gas before it is expanded to prevent ice formation. Aqueous methanol condensate separated from the expanded gas is distilled for the recovery and reuse of methanol.

    Abstract translation: 管道气体的高压被降低到分配系统的低压,同时通过使气体通过两个涡轮膨胀机驱动的两个连续的离心式压缩机同时产生制冷,其中压缩气体膨胀到相继降低的压力。 当离开每个涡轮膨胀机时,制冷从气体中回收。 在膨胀之前将甲醇注入管道气体中以防止形成冰。 蒸馏出从膨胀气体中分离的甲醇浓缩水,用于回收和再利用甲醇。

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