辽河油田100万m3/d天然气轻烃回收装置的方案优化
Scheme Optimization for 100x104 m3/d Light Hydrocarbon Recovery Equipment in Liaohe Oilfield
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- DOI:
- 作者:
- 王荧光
WANG Ying-guang
- 作者单位:
- 中油辽河工程有限公司, 辽宁盘锦 124010
PetroChina Liaohe Petroleum Engineering Co.,Ltd.,Panjin 124010,China
- 关键词:
- 天然气;轻烃回收装置;方案优化
natural gas;light hydrocarlbon recovery equipment;scheme optimization
- 摘要:
- 辽河油田200万m3/d天然气轻烃回收装置，目前由于设计规模与实际处理量不匹配，设备老化严重，装置已不能满足生产运行要求，拟新建一套处理规模为100万m3/d的轻烃回收装置。通过大量模拟计算，分析了C2, C3收率与制冷温度和总能耗之间的关系，确定了制冷温度为一114 0C,C2收率为85% , C3收率为98%的最优工艺参数。针对工程特点对轻烃回收方案进行了优选，最终确定了膨胀机制冷加丙烷辅助制冷的同轴前增压的轻烃回收方案。该方案采用丙烷辅助制冷系统，增强了装置对组分波动的适应性，避免了目前装置氨系统的腐蚀问题;再生气取自分子筛出口并返回压缩机三级入口，利用原料气压缩机三级增压，增加装置运行的平稳性，同时取消再生气分离器，减少了投资;增设再生气换热器，回收再生气余热590 kW，减少燃料气消耗40万m3/a以上;冷量和热量梯级利用，能量利用率高，单位综合能耗低于国内和国际能耗水平。
The 200x104 m3/d light hydrocarbon recovery equipment in Liaohe Oilfield isthe biggest0nein China. Because the actual treatment capability of the equipment is far lower than the designedoneeqmpment issevere aging, the equipment can not satisfy the production requirement. Therefore,a nehand theprojectis planned to build which has a treatment capability of 100x104 m3/d. The VMGSIM numerical simulation re-sups show that the optimal process conditions of the equipment are as follows: the lowest cooling temperatureof-1140C, CZ recovery rate of 85% and C3 recovery rate of 98%. Moreover, the scheme optimization for theequipment is carried out according to its engineering characteristics. The coaxial anterior turlx charged tech-nique and process of expander refrigeration plus the propane auxiliary reigeration are applied. The analysisshows that the propane auxiliary refrigeration process greatly enhances the adaptability of component fluctuationand avoids the corrosion problem of the ammonia refrigeration system. The regenerated gas from molecularsieve desiccator outlet returns to the three-stage inlet of the compressor, than the gas pressure is increased bythe compressor, thus enhances the stability of the system, and it decreases the investment by canceling theregenerated gas separator. The new regenerated gas heat exchanger recycles the waste heat of 590 kW anddecreases the consumption of fuel gas of 40x104 m3/a; the cool energy and heat energy is step-b y-step utilized,and the unit consumption of energy is below the domestic and international expenditure standard of energy.2010,2(2): 8-11 收稿日期：2009-5-7分类号：TE868作者简介：王荧光(1979-)男，辽宁抚顺人，工程师，2005年毕业于辽宁石油化工大学化学工程与工艺专业，硕士学位，现主要从事石油天然气地面工程设计及研究工作.