关键词: 半贫液工艺, 单一胺液, 三元复配胺液, 吸收性能, 再生能耗

Abstract:

In order to achieve the goal of reducing cost and increasing efficiency in natural gas decarburization plant, this paper, based on thesemi-lean MDEAsemi-lean liquid process activated by PZ in a plant, further improves the performance of amine liquid under the existing equipment capacity, and selects the formula of ternary complex amine liquid to replace the original absorbent. The appropriate subject amine liquid and additive were selected by experiment of barren solution with single amine liquid, half barren solution and rich liquid, respectively. Then, the absorption and regeneration performance of the ternary blends with amine liquid were studied to determine the, look for large capacity of absorption, quick absorption rates, high desorption rate, circulating high solubility and low energy consumption of regeneration of optimum comprehensive properties for determination of amine liquid formula. It was found that AMP, DETA and PZ had better absorption performance in single amine solution, and TEA has the lowest energy consumption and highest desorption rate. For ternary complex amine solution, when MDEA/DEEA was the main amine solution, the absorption rate and absorption load of the two amine solutions were both higher in the state of poor solution. The final desorption rate of MDEA/TEA dual-main amine solution was higher than that of MDEA/DEEA dual-main amine solution. The addition of TEA significantly improved the desorption rate of amine solution. The recycling solubility ofsemi-lean solution of the selected ternary high-efficiency amine solution 18%MDEA+18%TEA+4%PZ formula was higher than that of the original PZ activated MDEA formula, and the renewable energy consumption was lower, which can replace PZ activated MDEA amine solution for the decarburization process of natural gassemi-lean solution.

Key words: semi-lean process, monoamine solution, ternary complex amine solution, absorption property, renewable energy consumption