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液化天然气用途广泛,使用过程中无污染,环保,不仅被公认为自然界最干净的能源之一,而且是当代生活不可或缺的能源之一,因此,选择合适的存储方式显得非常重要。我国重卡,客运车、私家车等燃料改装正在逐渐扩大,液化天然气气瓶市场需求旺盛,通过对车载低温液化天然气瓶的特征用途介绍,提供了一种可供参考的专用燃料容器设备。 相似文献
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液化天然气(LNG)工业曾经在相当长的一段时间里都把注意力放在陆上大规模基荷型(base-load LNG)液化项目。近几年来,LNG工业开始显现出一些新的发展趋势,如北美的页岩气热、海上天然气资源的开发、使用LNG作为车船用燃料以及在极寒地区建设液化设施等。这些新趋势带来新的挑战,要求人们对工艺技术选择进行谨慎思考。在这个大背景下,最近筹建和在建的新兴LNG项目多具有与传统项目不同的特征,如原料气来源、驱动方式与燃料要求、海洋运动对设备的影响以及外部气候条件等。与此同时,这些项目在可靠性、易操作性、效率和产能等方面也具有不同的要求和侧重点。本文首先对传统基荷型LNG项目在液化工艺技术方面需要考虑的问题进行综述,然后重点论述如何针对新LNG项目优化这些问题以期达到更好的投资回报。以使用2个LNG项目作为案例分析,来展示如何进行正确的工艺技术选择以保证项目成功。 相似文献
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天然气作为主要的清洁能源,在全球天然气应用需求日益增长的社会背景下,如何保障天然气液化技术能够安全、经济、有效地量产,对于加速天然气的开发与利用和优化能源结构具有至关重要的现实意义。因此,通过对传统液化工艺及改进液化工艺的流程、特点进行简述,对比分析各种液化技术的优、缺点,提出天然气液化工艺的优选范围,并对未来研究思路和优化方向概括总结,为改进天然气液化工艺提供借鉴。 相似文献
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针对国内能源供需矛盾的日显突出,结合国家低碳、环保经济发展要求,提出加快发展液化天然气储配站建设,更好地使液化天然气在民用生活燃气、公交、出租、私用汽车,特别是动力载重汽车以及在低温制冷行业中推广使用的可行性及必要性。 相似文献
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液化天然气气化是城市燃气供应企业的一个重要的工艺流程,气化率的高低直接影响燃气企业的购供差及企业利益。研究液化天然气气化率影响因素,制定和采取控制液化天然气气化率和热值的措施成为液化天然气经营企业的重要研究课题。 相似文献
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Wangyun Won Sun Keun Lee Kwangho Choi Yongchai Kwon 《Korean Journal of Chemical Engineering》2014,31(5):732-743
Natural gas (NG) and liquefied NG (LNG), which is one trade type of NG, have attracted great attention because their use may alleviate rising concerns about environmental pollution produced by classical fossil fuels and nuclear power plants. However, when gas reserves are located in stranded areas and a portion of the offshore reserves is a significant amount of the total gas reserves, LNG is not suitable because (i) installation of pipelines for the transfer of NG to onshore LNG facilities is expensive and difficult, and (ii) it still has environmental and security problems. As a result, there are many efforts to excavate and monetize these stranded and offshore reserves with floating facilities where offshore liquefaction of NG is possible. Therefore, the development of floating LNG (FLNG) technology is becoming important. Although the FLNG technologies have advantages over conventional LNG technologies, there are still several roadblocks. To overcome the challenges, modular designs related to the main and typical stages of the FLNG process — gas pretreatment, liquefaction and regasification topsides, hulls, mooring, and transfer systems should be enhanced. Regarding FLNG ongoing operations and future plans, there are six nations (Argentina, Brazil, Kuwait, UAE, UK, and USA) operating FLNG, and a variety of FLNG liquefaction projects will be finished soon. Shell and Petrobras are making rapid strides to build FLNG facilities, and Flex LNG, Hoegh LNG, SBM Linde, MODEC, and Saipem are also building their FLNGs. In this review paper, we initially review the LNG concept and compare it with FLNG. In turn, new and typical FLNG technologies are introduced and the main challenges are also explained with insight into how these challenges are overcome. The main market drivers for FLNG industry are also considered. 相似文献
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陈文杰 《化学工业与工程技术》2014,35(5):16-19
介绍了天然气中水分、硫化氢、二氧化碳、重烃、汞及氮气等杂质对LNG工厂液化的影响,以及天然气的净化工艺.根据某公司液化天然气工厂天然气来源变化,说明天然气的组成对天然气净化工艺选择的影响. 相似文献
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针对在天然气液化过程中原料气参数时常发生变化,导致液化流程工艺参数处于不稳定状态,而这些参数的变化对液化系统产生的影响不能通过静态模拟来分析。利用Aspen Dynamics对液化系统在受到扰动的情况下进行动态模拟,以得到系统响应曲线并作动态分析。结果表明:系统对原料气参数变化做出不同程度的动态响应,其中温度干扰对系统稳定性影响较大,当施加不同方向的扰动时,系统出现反响现象,同时,根据模拟中液化系统所出现的反响特征,提出通过控制预冷制冷剂压缩机功率和深冷制冷剂节流阀开度来分别控制预冷和深冷制冷量的控制配对,通过动态模拟,证明该控制结构能对干扰迅速做出调整,提高了系统的稳定性。 相似文献
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《煤炭加工与综合利用》2017,(4)
总结了焦炉煤气制液化天然气技术的工艺流程以及国内外甲烷化技术的发展现状;分析原料来源、工艺技术及市场环境三方面因素对焦炉煤气制液化天然气发展的影响;指出了焦炉煤气制液化天然气后续产品的利用途径以及今后的发展方向。 相似文献
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A novel process to recovery natural gas liquids from oil field associated gas with liquefied natural gas (LNG)cryogenic energy utilization is proposed.Compared to the current electric refrigeration process,the proposed process uses the cryogenic energy of LNG and saves 62.6%of electricity.The proposed process recovers ethane, liquid petroleum gas(propane and butane)and heavier hydrocarbons,with total recovery rate of natural gas liquids up to 96.8%.In this paper,exergy analysis and the energy utilization diagram method(EUD)are used to assess the new process and identify the key operation units with large exergy loss.The results show that exergy efficiency of the new process is 44.3%.Compared to the electric refrigeration process,exergy efficiency of the new process is improved by 16%.The proposed process has been applied and implemented in a conceptual design scheme of the cryogenic energy utilization for a 300 million tons/yr LNG receiving terminal in a northern Chinese harbor. 相似文献