【摘要】：隨著我國(guó)節(jié)能減排和能源結(jié)構(gòu)優(yōu)化的推進(jìn),以及相關(guān)環(huán)保法律法規(guī)的完善,天然氣凈化得到了越來越多的重視和關(guān)注。凈化裝置的穩(wěn)定、可靠及安全運(yùn)行對(duì)保障下游用氣至關(guān)重要,對(duì)已建天然氣凈化裝置定期開展運(yùn)行方案優(yōu)化研究成為凈化廠生產(chǎn)過程的必要環(huán)節(jié)。 某凈化廠有天然氣凈化裝置兩套(單套設(shè)計(jì)處理量為375×104m3/d),因氣田生產(chǎn)開發(fā)進(jìn)入中期,天然氣氣質(zhì)變化明顯。為保證裝置的平穩(wěn)運(yùn)行,需要對(duì)裝置的運(yùn)行方案和參數(shù)進(jìn)行調(diào)整。本論文采用過程模擬軟件,選擇專用基礎(chǔ)物性數(shù)據(jù)及熱力學(xué)狀態(tài)方程進(jìn)行脫硫脫水工藝流程的模擬分析,并對(duì)裝置的主要單體設(shè)備進(jìn)行核算。同時(shí),與原設(shè)計(jì)參數(shù)、現(xiàn)場(chǎng)實(shí)際運(yùn)行參數(shù)進(jìn)行數(shù)據(jù)對(duì)比分析,獲得該凈化裝置生產(chǎn)運(yùn)行的主要影響因素、處理極限以及在工藝方面存在的問題和瓶頸。在此基礎(chǔ)上完成凈化裝置操作參數(shù)優(yōu)化和工藝優(yōu)化,獲得裝置平穩(wěn)、可靠的優(yōu)化運(yùn)行方案。 研究結(jié)果表明：在保證裝置穩(wěn)定、安全運(yùn)行前提下,該凈化裝置的天然氣單套處理量能夠達(dá)到412×104m3/d。優(yōu)化調(diào)整后的合理運(yùn)行參數(shù)為：采用40%(wt)MDEA溶液,原料氣進(jìn)氣壓力為5.15MPa,溫度為15℃時(shí),兩套裝置的溶液總循環(huán)量分別為76.6m3/h、86.5m3/h,其中進(jìn)入第18層塔板的貧液量分別為67.91m3/h、76.68m3/h,進(jìn)入第15層塔板的貧液量分別為7.55m3/h、8.52m3/h；合理的再生塔加熱蒸汽用量在0.12-0.18t/m3MDEA溶液之間。針對(duì)脫水裝置進(jìn)行了參數(shù)分析,獲得了脫水裝置的較佳參數(shù)：TEG循環(huán)量為6.12m3/h,TEG進(jìn)吸收塔溫度為52℃左右,氣提氣用量為105.32m3/h左右。在工藝改進(jìn)方面,提出了增加氣/氣換熱器、調(diào)整MDEA循環(huán)泵、調(diào)整胺液空冷+水冷運(yùn)行模式、部分時(shí)段停運(yùn)汽提氣等工藝優(yōu)化和改進(jìn)方案。通過主要單體設(shè)備核算的結(jié)果表明：三甘醇后冷器的換熱面積不足,建議將原套管式換熱器更換為列管式換熱器,且換熱面積不小于15.8m2。
[Abstract]:With the promotion of energy saving and emission reduction, energy structure optimization, and the improvement of related environmental laws and regulations, natural gas purification has been paid more and more attention. The stable, reliable and safe operation of the purification unit is very important to ensure the downstream gas consumption. It is necessary for the production process of the purification plant to carry out the optimization research on the operation scheme of the established natural gas purification plant regularly. There are two sets of natural gas purification units in a certain purification plant (a single set of designed treatment capacity is 375 脳 104m3/d), because the gas temperament changes obviously in the middle stage of gas field production and development. In order to ensure the smooth operation of the device, it is necessary to adjust the operation scheme and parameters of the device. In this paper, the process simulation software is used to analyze the desulphurization and dehydration process by selecting the special basic physical property data and thermodynamic equation of state, and to calculate the main unit equipment of the unit. At the same time, by comparing the data with the original design parameters and the actual operation parameters, the main factors affecting the production and operation of the purification unit, the treatment limit, the problems and bottlenecks in the process are obtained. On this basis, the operation parameters and process optimization of the purification unit are optimized, and a stable and reliable optimal operation scheme is obtained. The results show that the natural gas treatment capacity of the unit can reach 412 脳 10 ~ 4 m ~ (3 / d) under the condition of stable and safe operation. The optimal operation parameters are as follows: using 40% (wt) MDEA solution, the inlet pressure of raw gas is 5.15 MPA, the temperature is 15 鈩，

本文編號(hào)：2333042