提出了3 MPa分段式反应吸附耦合的氨合成工艺，即将反应塔和吸附塔拆分成3份，并以"反应1-吸附1-反应2-吸附2-反应3-吸附3"的方式交替串联。通过这种方式，分段耦合工艺可"突破"热力学平衡限制，实现较高的回路氨净值。使用Aspen Plus对该工艺进行了模拟计算，并与相同氨产量下的10 MPa布朗工艺氨合成回路、3 MPa单段式反应吸附耦合的氨合成回路进行比较，结果表明，分段耦合工艺可将回路氨净值从6.00%提高至15.04%，入反应塔气量降低56.22%，循环压缩机功率降低46.37%，具有明显的节能减排效果。

An ammonia synthesis process using multi-stage reaction-adsorption coupled method under 3 MPa is proposed. It means that both reaction tower and adsorption tower are divided into three parts, and connected in the form of "reaction 1-adsorption 1-reaction 2-adsorption 2-reaction 3-adsorption 3". The proposed method can break through the limitation of thermal equilibrium, and achieve a higher net ammonia concentration. Aspen Plus software is employed to simulate this process, which is compared with ammonia synthesis processes respectively using 10 MPa Brown method and 3 MPa single-stage reaction-adsorption coupled method under the same ammonia production. It is shown from the results that the process using multi-stage reaction-adsorption method can increase the net ammonia concentration from 6% to 15.04%, drop the reaction tower inlet flow rate by 56.22%, and reduce the power consumption of recycle compressor by 46.37%. It shows a significant effect in energy conservation and emission reduction.

朱明(1984-),男,博士,讲师,研究方向为传质分离工程,averyisgood@163.com