中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

9 records (took 0.017 seconds)

    Systems and methods for short loop regeneration of gas dehydration units
    1.
    发明授权
    Systems and methods for short loop regeneration of gas dehydration units 有权

    公开(公告)号：US10076721B2

    公开(公告)日：2018-09-18

    申请号：US15407561

    申请日：2017-01-17

    Applicant: Chevron U.S.A. Inc.

    Inventor： Saham Sam Tafreshi ,  Kamal Gursahani ,  Yawen Q. Owen ,  Robert E. Marshall

    IPC: B01D53/26 ,  B01D53/04

    CPC classification number: B01D53/261 ,  B01D2253/116 ,  B01D2257/80 ,  B01D2259/4009 ,  C10L3/106 ,  C10L2290/542

    Abstract: Water saturated molecular sieve in a gas dehydration unit is regenerated. A short loop is used in which regeneration gas is recycled to a heater upstream of a vessel in regeneration mode. The regeneration gas passes over the molecular sieve in the vessel to desorb water thereby regenerating the molecular sieve. The short loop also includes a condenser, a water separator and a compressor. The regeneration gas is not recycled to the AGRU at the front-end of the plant, thus the regeneration gas flow rate can be increased, as it is not limited by the front-end capacity of the plant. Moreover, the pressure of the system during regeneration can be reduced within the limits of system hydraulics. By using the short loop, the total time required for regeneration can also be reduced. The embodiments disclosed can de-bottleneck molecular sieve regeneration constraints in LNG, LPG or cryogenic gas plants.

    System for closed loop dehydration of a mercury removal unit
    3.
    发明授权
    System for closed loop dehydration of a mercury removal unit 有权

    公开(公告)号：US10537844B2

    公开(公告)日：2020-01-21

    申请号：US16563051

    申请日：2019-09-06

    Applicant: Chevron U.S.A. Inc.

    Inventor： Robert E. Marshall, IV ,  Saham Sam Tafreshi

    IPC: B01D53/02 ,  B01D53/04 ,  B01D53/26

    Abstract: Disclosed is a system in which saturated mercury adsorbent in a gas mercury removal unit is dehydrated in a LNG, LPG or cryogenic gas plant using a regeneration gas stream. Spent regeneration gas stream is then condensed and the water is removed therefrom to form a renewed regeneration gas stream in a closed loop. The regeneration gas stream is compressed and recycled to a location in the plant upstream of an acid gas removal unit or upstream of a regeneration gas dehydration unit such that the regeneration gas stream is not sent to a flare. A dehydration unit having a pair of dehydration vessels, arranged in parallel, alternating between absorption and regeneration modes, receives gas from the compressor. Conventional plants can be retrofitted to achieve improved process efficiencies, cost savings and environmental benefits.

    SYSTEMS AND METHODS FOR SHORT LOOP REGENERATION OF GAS DEHYDRATION UNITS
    4.
    发明申请
    SYSTEMS AND METHODS FOR SHORT LOOP REGENERATION OF GAS DEHYDRATION UNITS 审中-公开

    公开(公告)号：US20180200664A1

    公开(公告)日：2018-07-19

    申请号：US15407561

    申请日：2017-01-17

    Applicant: Chevron U.S.A. Inc.

    Inventor： Saham Sam Tafreshi ,  Kamal Gursahani ,  Yawen Q. Owen ,  Robert E. Marshall

    IPC: B01D53/04 ,  B01D53/26

    CPC classification number: B01D53/0438 ,  B01D53/261 ,  B01D2253/116 ,  B01D2257/80 ,  B01D2259/4009

    Abstract: Water saturated molecular sieve in a gas dehydration unit is regenerated. A short loop is used in which regeneration gas is recycled to a heater upstream of a vessel in regeneration mode. The regeneration gas passes over the molecular sieve in the vessel to desorb water thereby regenerating the molecular sieve. The short loop also includes a condenser, a water separator and a compressor. The regeneration gas is not recycled to the AGRU at the front-end of the plant, thus the regeneration gas flow rate can be increased, as it is not limited by the front-end capacity of the plant. Moreover, the pressure of the system during regeneration can be reduced within the limits of system hydraulics. By using the short loop, the total time required for regeneration can also be reduced. The embodiments disclosed can de-bottleneck molecular sieve regeneration constraints in LNG, LPG or cryogenic gas plants.

    ENERGY RECOVERY FROM REDUCTION IN PRESSURE OF A DENSE PHASE HYDROCARBON FLUID
    6.
    发明申请
    ENERGY RECOVERY FROM REDUCTION IN PRESSURE OF A DENSE PHASE HYDROCARBON FLUID 审中-公开
    能量回收减少压力的相位油相流体

    公开(公告)号：US20170059091A1

    公开(公告)日：2017-03-02

    申请号：US15250030

    申请日：2016-08-29

    Applicant: Chevron U.S.A. Inc.

    Inventor： Saham Sam Tafreshi ,  Paul Mark Shain ,  Jen Kai Chen

    IPC: F17C9/04 ,  F02C1/02

    CPC classification number: F17C9/04 ,  E21B43/00 ,  F25J1/0022 ,  F25J1/0035 ,  F25J2220/64 ,  F25J2240/04 ,  F25J2240/40

    Abstract: Disclosed are processes in which the pressure of a dense phase fluid stream containing hydrocarbons is reduced to produce a two-phase fluid stream, and energy is recovered. The process includes passing the dense phase fluid stream at a pressure greater than the cricondenbar pressure of the dense phase fluid stream through an expander where the dense phase fluid stream is expanded isentropically such that a two phase fluid stream having a pressure lower than the pressure of the dense phase fluid stream leaves the expander. The expander is coupled to a rotating mechanical power user, such that the expander drives the rotating mechanical power user. The process further includes passing the two phase fluid stream leaving the expander to a separator such that the two phase fluid stream is separated into a vapor phase stream and a liquid phase stream. The composition or quantity of liquid formed can be adjusted to control the dew point of the gas produced from the dense-phase fluid.

    Abstract translation: 公开的是其中包含烃的致密相流体流的压力被降低以产生两相流体流的过程，并且回收能量。 该过程包括使致密相流体流在致密相流体流的环形压力下通过膨胀器，其中致密相流体流等离子体膨胀，使得具有低于压力的压力的两相流体流 密相流体流离开膨胀机。 膨胀机联接到旋转的机械动力用户，使得膨胀器驱动旋转的机械动力用户。 该方法还包括使离开膨胀器的两相流体流通过分离器，使得两相流体流分离成气相流和液相流。 可以调节形成的液体的组成或数量，以控制从密相流体产生的气体的露点。

Patent Agency Ranking