大庆某天然气处理厂轻烃回收工艺设计及优化
发布时间：2018-10-19 10:02
【摘要】：提高轻烃回收装置收率问题的目的在于处理的原料气的气源较多,组分变化频繁。在该条件下回收装置既要保证轻烃的收率还要同时做到有效能的最大化利用。随着大庆油田对轻烃产量的要求不断增加以及节能降耗要求的不断提高,对轻烃回收装置的工艺设计及操作方案的选择和优化提出更高要求。因此需要建立一套轻烃回收装置的工艺操作的方案与工艺优化的方法。本文通过对大庆油田北部区块天然气产出量以及原料气组分的分析,结合现场实际情况,首先对北区天然气处理厂轻烃回收装置的工艺方案进行初选,利用HYSYS软件对工艺流程中的主要单元进行模拟,通过使用模拟软件计算的方法对主要工艺设备进行选型和工艺操作参数的确定。同时应用HYSYS对设计的工艺方案进行优化分析,从而进一步对该装置进行挖潜增效。通过模拟分析得出了不同时期原料气的组分、进站流量、进站原料气压力、进站原料气温度对C2收率的影响。同时得出了丙烷预冷温度、膨胀机出口压力、脱甲烷塔进料温度对C2收率以及功耗的影响。最终确定了该套装置的最优工艺操作参数。同时在保证装置的轻烃收率的前提下,得出了装置中有能效能损失最大的两个单元(压缩机单元和冷箱单元)的优化方法。
[Abstract]:The purpose of improving the recovery rate of light hydrocarbon recovery unit is to deal with a large number of raw gas sources and frequent changes in composition. Under this condition, the recovery unit can not only guarantee the yield of light hydrocarbon but also maximize the utilization efficiency. With the increasing demand for light hydrocarbon production and the increasing demand for energy saving and consumption reduction in Daqing Oilfield, a higher requirement is put forward for the process design and operation scheme selection and optimization of light hydrocarbon recovery unit. Therefore, it is necessary to establish a set of process operation scheme and process optimization method for light hydrocarbon recovery unit. Based on the analysis of natural gas production and raw gas composition in the northern block of Daqing Oilfield, combined with the actual situation on the spot, the process scheme of the light hydrocarbon recovery unit in the North District Natural Gas treatment Plant is first selected in this paper. The main units in the process flow are simulated by using HYSYS software, and the selection of main process equipment and the determination of process operation parameters are carried out by using the method of simulation software calculation. At the same time, HYSYS is used to optimize and analyze the process scheme, so as to further exploit the potential and increase the efficiency of the plant. The effects of composition, flow rate, pressure and temperature of feed gas in different periods on the C _ 2 yield were obtained by simulation analysis. At the same time, the effects of propane precooling temperature, outlet pressure of expander and feed temperature of demethane tower on C2 yield and power consumption were obtained. Finally, the optimal operating parameters of the device are determined. At the same time, on the premise of ensuring the light hydrocarbon yield of the unit, the optimization method of two units (compressor unit and cold box unit) with the biggest energy efficiency loss in the unit is obtained.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE64
，
本文编号：2280802
[Abstract]:The purpose of improving the recovery rate of light hydrocarbon recovery unit is to deal with a large number of raw gas sources and frequent changes in composition. Under this condition, the recovery unit can not only guarantee the yield of light hydrocarbon but also maximize the utilization efficiency. With the increasing demand for light hydrocarbon production and the increasing demand for energy saving and consumption reduction in Daqing Oilfield, a higher requirement is put forward for the process design and operation scheme selection and optimization of light hydrocarbon recovery unit. Therefore, it is necessary to establish a set of process operation scheme and process optimization method for light hydrocarbon recovery unit. Based on the analysis of natural gas production and raw gas composition in the northern block of Daqing Oilfield, combined with the actual situation on the spot, the process scheme of the light hydrocarbon recovery unit in the North District Natural Gas treatment Plant is first selected in this paper. The main units in the process flow are simulated by using HYSYS software, and the selection of main process equipment and the determination of process operation parameters are carried out by using the method of simulation software calculation. At the same time, HYSYS is used to optimize and analyze the process scheme, so as to further exploit the potential and increase the efficiency of the plant. The effects of composition, flow rate, pressure and temperature of feed gas in different periods on the C _ 2 yield were obtained by simulation analysis. At the same time, the effects of propane precooling temperature, outlet pressure of expander and feed temperature of demethane tower on C2 yield and power consumption were obtained. Finally, the optimal operating parameters of the device are determined. At the same time, on the premise of ensuring the light hydrocarbon yield of the unit, the optimization method of two units (compressor unit and cold box unit) with the biggest energy efficiency loss in the unit is obtained.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE64
，
本文编号：2280802
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