天然气脱水装置的工艺的设计说明

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1、WORD摘要刚从井里采出来的天然气里充满了饱和水蒸气。水蒸汽可能是天然气中最令人讨厌的杂质。天然气被压缩或冷却时，水蒸汽会转变成液态或固态。液态水会加速设备的腐蚀，降低输气效率；而固态的冰则会堵塞阀门、管件甚至输气管线。为避免出现这些问题，在天然气进入输气管网之前，必须除掉其中的部份水蒸气。天然气工业常用的脱水方法有膨胀冷却法、加压冷却法、固体吸附剂吸附法、溶剂吸收法等。目前世界上天然气脱水应用最多的方法是溶剂吸收法中的甘醇法, 此次设计采用三甘醇脱水。湿气通过入口分离器，除去液态烃和固态杂质后，进入吸收塔底部。 在吸收塔向上通过充满甘醇的填料段或一系列泡帽或阀盘和甘醇充分接触，被甘醇脱去水后

2、，再经过吸收塔顶部的捕露网将夹带的液体留下。最后脱水后的干气离开吸收塔，经过贫甘醇冷却器( 甘醇干气热交换器)后进入销售输气管网。贫甘醇沿沿不断地被泵入吸收塔顶部，在塔经溢流管向下依次流过每一个塔盘，将在塔向上流动的天然气中的水蒸汽吸收。吸满了水的甘醇(富甘醇)从塔底排出，经过贫甘醇缓冲器中的大的预热盘管后，通过闪蒸罐过滤器后进入重沸器上的精馏柱顶部。本次设计主要是脱水主要单体设备设计，包括吸收塔、闪蒸罐、过滤分离器、甘醇再生器等设备。设计包括各设备的尺寸、物料衡算、热量衡算与设备选材。通过此设计工艺后的天然气在设计条件下水露点-10。关键词：天然气加工；三甘醇脱水；设备设计31 / 37Ab

3、stractFilled with saturated water vapor in the gas collected from the well out. Water vapor may be the most unpleasant impurities in natural gas. When the gas is compressed or cooled, the water vapor into a liquid or solid form. Liquid water will accelerate corrosion of the equipment, reduce the tra

4、nsmission efficiency; solid ice is clogged valve, pipe or gas pipeline. To avoid these problems, and must get rid of part of the water vapor before the gas into the pipeline network.Expansion cooling method commonly used in the dehydration method of the natural gas industry, pressurized cooling meth

5、od, the solid sorbent assay, solvent absorption method. The world's largest natural gas dehydration applications in the solvent absorption method glycol method, the design uses a TEG dehydration.Moisture through the inlet separator to remove liquid hydrocarbons and solid impurities into the abso

6、rber at the bottom of. Glycol filler segment or a series of bubble cap or valve plate and glycol in the absorber within the full access to, glycol take off the water after capture gel network of the absorber to the top of the entrained liquid to stay the next. Finally after dehydration, the dry gas

7、leaving absorber, after cooler of the poor glycol (DEG dry gas heat exchanger) into the sales pipeline network.Poor glycol along along constantly being pumped into the absorber at the top of each tray in turn flow down the tower through the overflow pipe, the water vapor absorption in the tower upwa

8、rd flow of gas. Glycol (rich glycol) to suck in water discharged from the bottom into the reboiler on distillation capitals, after the preheat coil in poor glycol buffer through the flash tank filter department.This design is mainly the dehydration of the main monomer equipment design, including the

9、 absorber, flash tank, filter separators, glycol regeneration and other equipment.The design includes the size of all equipment, material balance, heat balance and equipment selection.the water dew point of natural gas -10 in this design process in the design conditions.Keywords: naturalgasprocessin

10、g; TEG dehydration; equipment design目录1 绪论11.1设计的选题意义11.2国外研究现状与发展趋势21.3设计容31.4方案选取41.5设计重点71.5.1 脱水主要单体设备设计71.5.2 确定脱水装置运行主要参数82 基础数据计算92.1建设规模92.2甘醇用量92.3物料衡算92.3.1贫甘醇浓度的确定92.3.2脱水量102.3.3 三甘醇贫液循环量112.3.4 三甘醇富液循环量122.4设备计算122.4.1吸收塔工艺参数计算122.4.1.1吸收塔塔板数的确定122.4.1.2吸收塔直径的计算122.4.1.3泡罩塔板设计142.4.1.4吸

11、收塔壁厚计算172.4.1.5塔顶空间高度HD182.4.1.6塔板间距HT182.4.1.7塔底空间高度HB182.4.1.8吸收塔高度192.4.2 再生塔192.4.2.1 精馏柱192.4.2.2 重沸器192.4.2.3 重沸器火管的计算202.4.3 循环泵212.4.4 闪蒸罐212.4.5贫/富甘醇换热器222.5热量衡算222.5.1重沸器222.5.2贫/富甘醇换热器233 脱水装置选型243.1 主要工艺设备244 节能措施295 环境保护305.1 主要污染源和污染物305.2污染控制30心得体会32辞33参考文献341 绪论1.1设计的选题意义 随着世界经济迅速发展，