【摘要】：針對富含CO2天然氣脫除CO2技術現(xiàn)狀和現(xiàn)有凈化技術存在的問題進行研究,并在活化劑、工藝及運行條件優(yōu)化、變壓吸附和膜分離集成技術等方面指明新的研發(fā)方向,希望富含CO2天然氣凈化的整體技術得以成熟,從而促進我國富含CO2天然氣的大力開發(fā)�；罨疢DEA法是富含CO2天然氣脫除CO2的重要方法,且技術成熟。但是,為了降低能耗,提高經(jīng)濟效益,還需進一步優(yōu)化工藝流程及運行參數(shù)。本文通過對長嶺氣田富含CO2天然氣凈化裝置的研究,對經(jīng)濟運行指標進行分析,結果表明,可把綜合能耗作為優(yōu)化目標,裝置實際單位綜合能耗為1.028×104 MJ/104天然氣,高于設計值,存在節(jié)能空間,可根據(jù)自身的生產(chǎn)特點挖掘節(jié)能潛力。于是運用Aspen HYSYS軟件模擬,通過運行數(shù)據(jù)與模擬數(shù)據(jù)的對比來考察兩個模型的準確性,結果表明,Li-Mather模擬結果與運行數(shù)據(jù)更為吻合,因此選定Li-Mather為模型進行模擬。并且,討論了脫CO2方法和工藝流程對能耗的影響。同時,本文對富含CO2天然氣脫CO2工藝運行參數(shù)(原料氣溫度、原料氣處理負荷、MDEA貧液流率、吸收塔塔板數(shù)、吸收塔壓力、溫度、再生塔塔板數(shù))對脫CO2能耗的影響進行了重點研究。通過單因素實驗,確定了活化MDEA溶液脫除天然氣中CO2過程的關鍵操作參數(shù)(原料氣溫度、原料氣處理負荷、MDEA貧液流率、吸收塔壓力、吸收塔溫度、再生塔塔板數(shù))和優(yōu)化區(qū)間。最后,通過響應面法對實驗方案進行設計,并通過實驗結果的分析獲得最佳的過程參數(shù):原料氣溫度25℃,原料氣處理負荷82.12%,MDEA貧液流率16150 kmol/h,吸收塔壓力4.21 MPa,吸收塔溫度54.8℃,再生塔塔板數(shù)19,總能耗3.55315×107 kJ/h,相比模擬實驗值,誤差極小,僅為0.02%。相比凈化站現(xiàn)階段MDEA脫CO2工段實際能耗,優(yōu)化后總能耗降低了26.97%。
[Abstract]:The present situation of CO2 rich natural gas CO2 removal technology and the problems existing in existing purification technologies are studied, and a new research direction is pointed out in the aspects of activator, optimization of process and operation conditions, pressure swing adsorption and membrane separation integration technology, etc. It is hoped that the whole technology of purifying rich CO2 natural gas will be mature and promote the development of rich CO2 natural gas in China. Activated MDEA method is an important method for removing CO2 rich in CO2 natural gas, and the technology is mature. However, in order to reduce energy consumption and improve economic efficiency, it is necessary to further optimize the technological process and operation parameters. Based on the research of CO2 rich gas purification unit in Changling gas field, the economic operation index is analyzed. The results show that the comprehensive energy consumption can be taken as the optimization goal, and the actual unit comprehensive energy consumption of the unit is 1.028 脳 10 ~ 4 MJ/104 natural gas. Higher than the design value, there is energy saving space, according to their own production characteristics can tap the potential of energy conservation. The accuracy of the two models is investigated by comparing the running data with the simulated data by using Aspen HYSYS software. The results show that the simulation results of Li-Mather are more consistent with the running data, so Li-Mather is selected as the model to simulate. In addition, the influence of CO2 removal method and technological process on energy consumption is discussed. At the same time, the operating parameters (raw gas temperature, raw gas treatment load, lean liquid flow rate of MDEA, plate number of absorber, pressure of absorber, temperature of absorber, etc. The influence of regeneration tower plate number on the energy consumption of CO2 was studied. Through single factor experiments, the key operating parameters of CO2 removal from natural gas by activated MDEA solution (raw gas temperature, raw gas treatment load, MDEA lean liquid flow rate, absorption tower pressure, absorption tower temperature, etc.) were determined. Regeneration tower plate number) and optimization interval. Finally, the experimental scheme was designed by response surface method, and the optimum process parameters were obtained through the analysis of experimental results: raw gas temperature 25 鈩，

本文編號：2327362