【摘要】：提高輕烴回收裝置收率問題的目的在于處理的原料氣的氣源較多,組分變化頻繁。在該條件下回收裝置既要保證輕烴的收率還要同時做到有效能的最大化利用。隨著大慶油田對輕烴產(chǎn)量的要求不斷增加以及節(jié)能降耗要求的不斷提高,對輕烴回收裝置的工藝設(shè)計及操作方案的選擇和優(yōu)化提出更高要求。因此需要建立一套輕烴回收裝置的工藝操作的方案與工藝優(yōu)化的方法。本文通過對大慶油田北部區(qū)塊天然氣產(chǎn)出量以及原料氣組分的分析,結(jié)合現(xiàn)場實際情況,首先對北區(qū)天然氣處理廠輕烴回收裝置的工藝方案進行初選,利用HYSYS軟件對工藝流程中的主要單元進行模擬,通過使用模擬軟件計算的方法對主要工藝設(shè)備進行選型和工藝操作參數(shù)的確定。同時應(yīng)用HYSYS對設(shè)計的工藝方案進行優(yōu)化分析,從而進一步對該裝置進行挖潛增效。通過模擬分析得出了不同時期原料氣的組分、進站流量、進站原料氣壓力、進站原料氣溫度對C2收率的影響。同時得出了丙烷預(yù)冷溫度、膨脹機出口壓力、脫甲烷塔進料溫度對C2收率以及功耗的影響。最終確定了該套裝置的最優(yōu)工藝操作參數(shù)。同時在保證裝置的輕烴收率的前提下,得出了裝置中有能效能損失最大的兩個單元(壓縮機單元和冷箱單元)的優(yōu)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.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE64
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本文編號：2280802