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为了解决天然气净化厂随着气田开发规模扩大而导致原料气酸性组分体积分数偏高、装置频繁故障这一紧迫问题,在利用DESIGNⅡ对现有气质条件下N-甲基二乙醇胺(MDEA)溶液循环量提高后的脱硫系统进行全流程模拟的基础上,重点通过FR I、HTR I等专业软件对关键设备优化前后的运行状况进行了对比分析。结果表明:胺液吸收塔和再生塔的流体力学性能满足优化后的技术要求;胺液贫富液换热器需要通过串联1台同型号换热器和更换换热管规格来达到系统指定的换热负荷并解决堵塞现象;胺液重沸器换热能力不足,可通过增加管束、表面翅化等手段提高其换热效率。该研究可为脱硫系统优化升级提供可靠的理论依据,对同类装置具有一定借鉴作用。
In order to solve the urgent problem that natural gas purification plant leads to high volume fraction of acid component of feed gas and frequent device malfunction as gas field development expands, After the circulation of the solution was increased, the desulfurization system was simulated based on the whole process. The professional software such as FR I, HTR I and so on were used to analyze the operating conditions before and after the optimization of key equipment. The results show that the fluid mechanics performance of the absorber and the regeneration tower of the amine satisfy the technical requirements of optimization. The rich and poor liquid heat exchanger of the amine liquid needs to meet the specifications specified by the system Heat load and solve the clogging phenomenon; amine reboiler heat exchanger capacity is not enough, by increasing the tube bundle, surface finification and other means to improve its heat transfer efficiency. The study can provide a reliable theoretical basis for the optimization and upgrading of desulfurization system, and has certain reference for similar devices.