常见的天然气净化装置主要由脱硫、脱水、硫黄回收、尾气处理、酸水气提等单元构成,其中脱硫单元是整个天然气净化装置最主要的工艺单元和能耗来源，在脱硫单元运行过程中,进料的状态波动对于天然气净化厂的稳定运行有重要影响。针对某天然气净化厂的脱硫单元,利用HYSYS软件先后建立稳态和动态模型,并用实际运行数据进行校验,确定模型的可靠性；再通过添加天然气进料状态(流量、温度)扰动,进行脱硫单元的过渡态过程模拟,调节控制参数,缩短能耗波动时间,使设备能快速稳定运行,降低进料状态的波动对设备运行的影响。分析天然气脱硫单元总能耗在过渡态过程中的变化可知,当进料状态发生波动时,单元总能耗均会发生波动,尤其是当流量、温度降低时,能耗波动更加明显。研究结果对化工装置过渡态过程中设备安全运行和生产能耗控制技术具有一定参考意义。

The common natural gas purification facilites are mainly consisting of desulfurization, dehydration, sulfur recovery, tail gas treatment, acid water extraction and other units, among which the desulfurization unit is the most important process unit and energy consumer of the whole gas purification facilities. During the operation of desulfurization unit, the real time fluctuation of feed material has an important impact on the stable operation of natural gas purification plant. Based on the desulfurization unit of a natural gas purification plant, the steady-state simulation model and dynamic model were successively built using HYSYS software, and validated using the actual operation data. By adding disturbance to the parameters of natural gas feed material (flow rate, temperature), the transient state of the desulfurization unit is simulated, and by adjusting control parameters, the energy consumption fluctuation time is shortened, so that the equipment can recover quickly back to steady state operation, and the impact of fluctuations in feed parameters on the equipment operation is reduced. The analysis of the change of total energy consumption of natural gas desulfurization unit in the transient state shows that when the feed parameters fluctuate, the total energy consumption of the unit will fluctuate, especially when the flow rate and temperature decrease, the energy consumption fluctuation is more obvious.