海洋工程装备与技术

海洋工程装备与技术 ›› 2014, Vol. 1 ›› Issue (1): 42-49.

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大型FLNG装置上部模块混合制冷剂液化工艺的适应性评价分析

王清1, 李玉星2, 谢彬1, 喻西崇1   

  1. 1. 中海油研究总院, 北京100027
    2. 中国石油大学(华东)储运与建筑工程学院, 山东青岛266580
  • 收稿日期:2014-02-21 出版日期:2014-01-30 发布日期:2017-12-07
  • 作者简介:

    王清(1987--), 女, 硕士, 主要从事海上FLNG液化工艺方面的研究.

  • 基金资助:
    国家科技重大专项(2011ZX05026-006)

Adaptability Evaluation of Mixed Refrigerant Liquefaction Process for Large Scale FLNG Topside

Qing WANG1, Yu-xing LI2, Bin XIE1, Xi-chong YU1   

  1. 1. CNOOC Research Institute, Beijing 100027, China
    2. College of Pipeline and Civil Engineering, China University of Petroleum (Huadong), Qingdao, Shandong 266580, China
  • Received:2014-02-21 Online:2014-01-30 Published:2017-12-07

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摘要：

对于大型浮式液化石油气(FLNG)装置, 液化工艺是整套装置非常关键的技术之一.混合制冷剂液化工艺具有流程简单,设备少,效率高,功耗小等优点, 已广泛应用于陆上液化工厂, 且将用于海上FLNG装置.混合制冷剂可细分成不同的工艺, 不同的液化工艺具有不同的特点和适用范围.利用HYSYS软件对不同进料流量,甲烷组分比例和重组分比例下的三种混合制冷剂工艺进行了模拟, 对比了三种流程的能耗与设备特征, 分析了适用于不同液化能力浮式装置的工艺流程.结果表明: 在天然气进气流量为65000 m3/d的条件下, 丙烷预冷混合制冷剂循环(C3MR)压缩机比功耗为0.3309, 双混合制冷剂循环(DMR)比功耗为0.2254, 单混合制冷剂循环(SMR)比功耗为0.2451; C3MR流程关键设备数量最多, DMR次之, SMR设备最少; C3MR所需的制冷剂量最大, SMR最小; 随着原料气中甲烷含量的变化, C3MR比功耗的变化最大, DMR,SMR比功耗变化较小.

关键词: FLNG, 混合制冷剂工艺, 敏感性分析, 海上适应性

Abstract:

As one of the key technologies of the whole device for large scale floating liquid natural gas (FLNG) equipment, liquefaction process is mainly dominated by foreign companies at present. Mixed refrigerant liquefaction process has the advantages of simple process, less equipments, high efficiency and lower power consumption, so it has been widely applied to liquefaction plant on land. It will also be adopted in the offshore FLNG which is about to put into production firstly in the world. Mixed refrigerant liquefaction process can be divided into different types of processes, and different liquefaction processes have different characteristics and scope of application. HYSYS software is used to simulate the three mixed refrigerant cycles under various conditions of feed flow, methane component ratio and heavy components ratio. Energy consumption and device features of different processes are compared. Processes which are suited to different liquefaction capacities are analyzed. The results show that, the ratios of power consumption of propane pre-cooled mixed refrigerant (C3MR), double mixed refrigerant (DMR) and single mixed refrigerant (SMR) are 0.3309, 0.2254 and 0.2451 respectively in the condition of 65000 m3/d natural gas inflow. Mixed refrigeration process which has the largest number of key equipments is C3MR, followed by the DMR, and the minimum is SMR. C3MR requires the most refrigeration while SMR requires the least. With the change of methane content in the feed gas, the ratio of power consumption of C3MR changes the most, while those of DMR and SMR change less.

Key words: FLNG, mixed refrigerant liquefaction process, sensitivity analysis, offshore adaptability

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