天然氣脫碳胺液性能及工藝參數(shù)優(yōu)化模擬與實驗研究
[Abstract]:With the large-scale exploitation of natural gas field and the rapid development of LNG industry, higher requirements for natural gas pretreatment process have been put forward. As the most widely used natural gas decarbonization method, organic amine method has become the focus and hotspot of the research. It aims to find the absorbent formula with better decarbonization performance, lower cycle flow rate and regeneration energy consumption, less corrosion and moderate price. On the basis of meeting the requirements of industrial production, the optimal operation parameters are determined in order to reduce the production cost. In this paper, on the basis of the screening results of primary amine, secondary amine, tertiary amine, enamine, steric amine, piperazine and other different kinds of single and mixed amines, the purpose of this paper is to decarbonize natural gas deeply. Four kinds of excellent formulation of amine solution were selected. First of all, the reaction kinetics was studied for the single amine solution of four kinds of amines and the TEA A mixed amine solution, which is less studied at present. The kinetic model was established, and the reaction rate constant, enhancement factor and absorption rate were calculated and analyzed. The interaction coefficient of mixed amines was studied. On the basis of theoretical research, a pilot plant for decarbonization with natural gas amines was used to comprehensively evaluate the absorption and regeneration properties of four kinds of amine-liquid formulations in simulated industrial production, taking into account factors such as price, etc. The amine-liquid formula with better comprehensive performance was selected, and a supplementary experiment was carried out by using a small reactor experimental device to verify its performance. The results showed that the amine-liquid formula selected in this paper had a good performance. On the basis of the previous research on the optimal selection formula, the HYSYS software was used to model the optimization of the mixture ratio and the applicability analysis of the amine solution under different acid gas concentration and feed gas flow rate. Finally, under the condition of constant total amine concentration, An optimum ratio of amine solution was determined to be MDEA 1.1 mol A. After the proportion optimization, the absorption and regeneration operation parameters of natural gas decarbonization process are optimized, and the optimum absorption temperature, absorption pressure, regeneration temperature, regeneration pressure and the circulating flow rate of amine liquid are determined. It provides a theoretical basis for the industrial application of the formulation of amines.
【學(xué)位授予單位】:中國石油大學(xué)(華東)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:TE644
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