共查询到19条相似文献,搜索用时 62 毫秒
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为了降低煤制天然气(SNG)管道输送过程中析出的液态水对SNG管道的危害,提出SNG出厂前必须进行深度脱水,使其露点低于输气管道的环境温度的方案。三甘醇脱水技术因脱水效率高、脱水后露点温度低、投资小、操作简单、运行费用低等优点,被广泛应用于国内煤制天然气项目中。介绍了三甘醇脱水原理、工艺流程、主要设备和设备防腐措施,并详细分析了进吸收塔湿气温度、三甘醇质量分数、吸收塔操作压力、三甘醇循环量等对脱水效率的影响。最后,概述了三甘醇脱水撬在国内在建煤制天然气项目中的应用情况,并分析了压缩后脱水工艺与压缩前脱水工艺的优缺点。 相似文献
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《中国石油和化工标准与质量》2019,(24):202-203
在油田开发或是集输过程中,天然气脱水是一个关键环节,由于在井口开采的天然气中含有水蒸气以及一些液滴,其会影响天然气运输。如果天然气中含水量超过一定标准,天然气与水分在一定温度与压力下就会形成混合物,会将天然气三甘醇脱水系统的设备堵塞,造成能源浪费。因此,应加强对天然气三甘醇脱水系统工艺的探讨,将天然气水分清除。本文是针对三甘醇贫液浓度的脱水效率在天然气三甘醇脱水系统运行中的影响、天然气三甘醇脱水系统工艺的相关流程、以及笔者针对天然气三甘醇脱水系统工艺提出的改善建议。 相似文献
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在天然气净化工业中,作为大规模脱水装置的三甘醇脱水装置得到了广泛使用。利用HYSYS软件对天然气三甘醇脱水流程进行了模拟研究,通过调节参数并查看对应脱水效果,从而分析出甘醇循环量、TEG贫液温度、吸收塔操作压力、塔板数以及汽提气量等因素对脱水效果的影响规律。使用HYSYS优化器功能,对装置参数进行了优化以使得塔底重沸器热负荷最小。通过本文的研究,可以了解各工艺参数对脱水效果的影响规律以及最优参数设置,对实际生产效率与经济效益的提高有一定的意义。 相似文献
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天然气脱水装置在可有效脱出天然气中的大部分水份,并实现吸水后的三甘醇富液的再生,是集气站天然气生产中的关键设备。其中脱水过滤系统是脱水装置的重要组成部分,其运行情况直接影响到三甘醇的品质、关系到天然气的脱水效果以及天然气输送。本文着重对天然气脱水装置的过滤系统进行了分析,对其运行中存在问题的技术改造和优化运行效果进行了阐述总结,为提高脱水装置的运行效率,减少三甘醇溶液消耗提供了借鉴。 相似文献
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油田伴生气三甘醇脱水装置设计 总被引:1,自引:0,他引:1
本文介绍了三甘醇法油田气脱水的机理、工艺流程、关键设备的设计构造,其中脱水吸收塔和重沸器是油田气脱水系统的核心。各设备操作温度对脱水效果的影响最为显著。 相似文献
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研究了Na3PO4·12H2O微波脱水新工艺,与常规热风干燥工艺相比较,微波干燥20 min的脱水效果与120℃热风干燥120min的效果相当,同时测定了Na3PO4·12H2O在微波场中的升温性能. 相似文献
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本文通过凝胶注模成形得到氧化铝陶瓷坯体,采用直接干燥、高湿干燥、液相介质干燥等方式对坯体进行干燥,研究了不同的干燥方式对坯体干燥速率及干燥效果的影响。结果表明:凝胶注模成形坯体对环境温度、湿度的变化非常敏感,高湿干燥、液相介质干燥可有效减缓干燥速率,避免干燥过程中出现的开裂现象。 相似文献
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天然气膜法脱水净化技术及应用 总被引:6,自引:0,他引:6
天然气脱水净化是保证天然气正常传输和使用的基本环节,膜法脱水技术与传统的溶剂吸收,物理吸附,冷却分离等具有较大的技术优势和发展潜力,本文介绍了天然气膜法脱水技术原理,特点,总结了吹扫和真空两种天然气膜脱水技术工艺,给出膜法脱水应用实例,并对集成净化技术进行分析。 相似文献
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M. C. Burshe S. B. Sawant V. G. Pangarkar 《Journal of the American Oil Chemists' Society》1999,76(2):209-214
Dehydration of glycerine-water mixtures by pervaporation (PV) was studied with Nafion® (NA), cellulose triacetate (CA), polyimide, carboxylated polyvinyl chloride (CPVC), and polyethersulfone (PES) membranes. PES membrane yielded the highest selectivity (6580) and CPVC membrane yielded the lowest selectivity (1552) at 5% by weight of water in the feed and 30°C. The NA membrane yielded the highest permeation flux (0.2–1.45 kg/m2h) of water over the entire water concentration range. Energy of activation of permeation for water was in the range of 7–15 kJ/mol, being highest for CPVC and lowest for CA. Comparison of PV and vapor liquid equilibrium data showed that the former gave better results, particularly for concentrating glycerine above 90 wt%. 相似文献
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利用Thielepape抽提器的脱水反应 总被引:1,自引:0,他引:1
通过一个装有固体吸水剂的Thielepape抽提器,对反应共沸物进行循环脱水,可以改进酯化、醚化等脱水反应,此法优于使用分水器的回流法。 相似文献
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An industrial scale dehydration process based on hollow fiber membranes for lowering the dew point of natural gas is described in this paper. A pilot test with the feed flux scale of 12×104 Nm3/d was carried out. Dew points of –8 °C∼–13 °C at a gas transport pressure in the pipeline of 4.6M Pa and methane recovery of more than 98% were attained. The water vapor content of the product gas could be maintained around 0.01 vol% during a continuous run of about 700 hours. The effects of feed flux and operation pressure on methane recovery and water vapor content were also investigated. Additionally, some auxiliary technologies, such as a full‐time engine using natural gas as fuel and the utilization of vent gas in the process, are also discussed. A small amount of the vent gas from the system was used as a fuel for an engine to drive vacuum pumps, and the heat expelled from the engine was used to warm up the natural gas feed. The whole system can be operated in a self‐sustainable manner from an energy point of view, and has a relatively high efficiency in the utilization of natural gas. 相似文献
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《分离科学与技术》2012,47(8):1335-1349
Abstract Pervaporative separation of acetone/water and isopropanol (IPA)/water systems has been studied in the water-lean range of composition of the feed mixtures. Poly(vinyl alcohol) (PVA) membranes crosslinked with citric acid, adipic acid, maleic acid, glutaraldehyde, and glyoxal were used for this purpose. The sorption characteristics of all the membranes indicate that these membranes have a good sorption selectivity for water in view of the hydrophilic nature of PVA. The type of crosslinker used for crosslinking has been shown to have an important bearing on the permeation characteristics of the membranes. Thus, the trifunctional citric acid yields the highest selectivity but lowest flux. A comparison of the productive capacities of the various membranes indicates that the glutaraldehyde crosslinked membrane has the maximum productive capacity for IPA dehydration whereas maleic acid crosslinked membrane yields the highest productive capacity for acetone dehydration. 相似文献
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Response Surface Methodology (RSM) was used for optimizing the drying technology of sweet pepper under low-vacuum. It was found that pH value has greater influence on the organic Se index, while drying temperature has greater effect on the chlorophyll index. The optimized parameters of drying temperature, pH value and blanching time were obtained, respectively. 相似文献