本文關(guān)鍵詞：天然氣處理廠脫重?zé)N系統(tǒng)工藝優(yōu)化　出處：《西安石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 脫重?zé)N 冷箱凍堵 流程模擬 參數(shù)優(yōu)化

【摘要】：天然氣作為清潔能源,在我國發(fā)展起步雖然較晚,但發(fā)展勢頭猛勁,隨著社會對天然氣需求量的不斷增加,更需要開發(fā)和應(yīng)用先進(jìn)的天然氣處理工藝方法。不管是油氣田開采的伴生氣和非伴生氣等只涉及“淺脫”的脫水脫烴,還是生產(chǎn)液化天然氣(LNG)等的深度凈化,都要根據(jù)處理精度要求和處理裝置規(guī)模,結(jié)合各種脫水脫烴方法的特點(diǎn)及實際進(jìn)行經(jīng)濟(jì)和技術(shù)比較,選擇出最為合適的技術(shù)工藝。C5+以上重?zé)N組分雖然在天然氣中占很少比重,但在天然氣液化工藝中若脫出不徹底,會在液化低溫段堵塞換熱器流道而使冷箱凍堵,降低了液化率、能耗增加,凍堵嚴(yán)重時會導(dǎo)致裝置停車。本文基于某日處理量為200萬方的天然氣液化項目,對其深度脫重?zé)N技術(shù)進(jìn)行一系列的基礎(chǔ)研究,為LNG裝置中的天然氣深度凈化提供理論基礎(chǔ)及技術(shù)支持。天然氣液化廠脫重?zé)N常用吸附法、深冷分離和溶劑洗滌法。本文結(jié)合吸附脫重?zé)N原理分析比較了不同吸附劑對重?zé)N組分的脫附性能,并分析A廠預(yù)處理單元脫酸脫水過程中的烴損失;對氣質(zhì)數(shù)據(jù)進(jìn)行采樣分析,分析流程中冷箱凍堵原因,并比較冷箱凍堵與不凍堵時換熱器換熱性能,針對本項目中所用雙循環(huán)混合制冷液化流程,用HYSYS軟件進(jìn)行模擬,建立混合制冷劑循環(huán)中壓縮機(jī)、板翅式換熱器、節(jié)流閥等設(shè)備的數(shù)學(xué)模型,計算穩(wěn)態(tài)模擬結(jié)果;限定液化產(chǎn)品量,在給定約束條件下根據(jù)冷劑能耗最小來優(yōu)化冷劑配比及脫重?zé)N“中點(diǎn)”溫度;根據(jù)系統(tǒng)能耗最小和液化產(chǎn)品產(chǎn)量最大兩種模式,給定約束條件,對工藝流程進(jìn)行參數(shù)優(yōu)化,通過對預(yù)冷溫度和工藝參數(shù)的優(yōu)化,以使在同等負(fù)荷和天然氣處理量下流程性能運(yùn)行最佳,降低冷箱凍堵的可能性。最后針對A廠因增加負(fù)荷時脫重?zé)N能力不足的缺陷,需增加脫重?zé)N裝置,文中第五段提出幾種改進(jìn)的脫重?zé)N方案,根據(jù)A廠實際,根據(jù)可靠性、合理性的選擇原則,從經(jīng)濟(jì)性、使用性等方面進(jìn)行比較,選出較合理的方案,為A廠需增加的脫重?zé)N工藝提供理論指導(dǎo)。
[Abstract]:Natural gas as a clean energy development in China started late, but the development momentum is fierce, with the increasing social demand for natural gas, natural gas processing method to the development and application of advanced. Whether the oil and gas exploration associated gas and non associated gas only relates to "light off" dewatering hydrocarbon, or the production of liquefied natural gas (LNG) and the depth of purification, according to the processing accuracy and processing device size, and the actual characteristics of dehydration and dealkylation method combined with a variety of economic and technical comparison, choose the most suitable technology more than.C5+ while heavy hydrocarbon in natural gas accounted for a small proportion but, in the natural gas liquefaction process if the extrusion is not complete, in the low temperature liquefied section block heat exchanger channel and the cold box freezing, reduce the liquefaction rate, energy consumption increases, freezing will lead to serious parking device based. In one day to supply liquefied natural gas project 2 million, the depth of heavy hydrocarbon removal technology based on a series of research, provide theoretical basis and technical support for natural gas purification device. The depth of LNG natural gas liquefaction plant and heavy hydrocarbon commonly used adsorption, cryogenic separation and solvent washing method in this paper. Adsorption removal of heavy hydrocarbon analysis principle comparison of different adsorbents for heavy hydrocarbon desorption performance points, and analyze the pretreatment unit of A plant acid dehydration process of hydrocarbon loss; sampling and analysis of data analysis in the process of temperament, cold box freezing, and cold box freezing and freezing time heat exchanger performance for double cycle used in this project in the mixed refrigerant liquefaction process was simulated by the HYSYS software, establish the compressor mixed refrigerant cycle, plate fin heat exchanger, mathematical model of throttle valve and other equipment, the calculation of steady state simulation results; limit Fixed amount of liquefaction products, under the given constraint condition according to the minimum energy consumption to optimize the refrigerant refrigerant ratio and heavy hydrocarbon removal "point" temperature; system according to the minimum energy consumption and liquefaction products yield the largest two modes, given constraints, to optimize the process, through the optimization of pre cooling temperature and process parameters, in order to make under the same load and gas handling capacity process performance best, reduce the possibility of cold box freezing. According to the defects of A plant due to increased load when the heavy hydrocarbon removal ability, increase the heavy hydrocarbon removal device, the fifth section in this paper put forward some improved scheme of heavy hydrocarbon removal, according to the actual situation of A factory. According to the selection principle of reliability, rationality, from the economy, compared with other, choose a reasonable plan for A factory need to increase the heavy hydrocarbon removal process to provide theoretical guidance.

【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE644

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本文編號：1419309