LNG接收站工艺流程模拟计算

Process simulation of LNG receiving terminal

采用软件对LNG接收站工艺流程进行静态模拟计算是LNG接收站工艺设计最重要的工作之一。采用HYSYS软件建立模型并开展研究,分析了影响模拟结果准确性的关键因素。根据所得结果,认为在某一假设参数条件下LNG接收站在零气态外输、卸船、无槽车槽船外输的工况的BOG量最大;在最大气态外输、装车、装船工况下低压外输负荷最大;采用中/高压BOG压缩机直接外输与再冷凝工艺相结合的BOG处理工艺有利于在气态外输和液态外输量较小的工况下减少放空。

One of the most essential parts in the design stage of LNG terminal project was using software to simulate the process. HYSYS software was used to build a model to simulate a LNG receiving terminal, and the key factors influencing the simulation results were analyzed. Based on the results, it was believed that the station would have the largest amount of BOG when no gas or liquid product was exported and LNG was unloading, and during loading the export load was highest when the amount of gas output was largest. Using recondenser to recycle BOG and medium or high-pressure BOG compressor to output gas directly could reduce BOG venting when gas or liquid product output was small.