关键词: 合成天然气, 节能减排, 技术创新, 换热网络集成

Abstract: The study on energy saving has an important significance for promoting the development of china’s coal to synthetic natural gas (SNG) demonstration project. The paper analyzes the energy utilization of a typical coal to SNG plant and determines the energy/materials consumption of each unit process, and the results show that coal gasifier and captive power plant are more prominent. It is pointed out that the following three ways, technological innovation of key process, e.g., BGL(British Gas-Lurgi) gasifier and low/isothermal temperature methanation reactor; cascade utilization of energy and heat exchanger network integration; as well as an efficient energy management system, would be of significant for improving the energy efficiency. This paper provides an insight into analysis and guidance in determining the optimal schemes for energy saving in coal to SNG plants.

Key words: synthetic natural gas, energy saving, technological innovation, exchanger network integration