两类气化技术在SNG项目的应用比较

Comparision of two gasification technology application in SNG project

气化技术是SNG项目的关键技术,影响项目的能效、煤耗、成本、经济效益等。固定床气化技术和气流床气化技术比较成熟,应用广泛。通过对两类气化技术在SNG项目的技术经济对比分析,可为SNG项目的气化技术选择提供一些指导。在分析SNG项目的工艺技术路线和两类气化技术的特点的基础上,探讨了在SNG项目应用的技术优劣势,并以大同煤制气项目为例对投资和经济效益进行了对比分析。结果表明:固定床气化技术在投资、生产成本和经济效益方面具有比较明显的优势,气流床气化技术则在设备大型化、污水处理方面具有一定的优势。综合来看固定床气化技术更适合于SNG项目。最后分析了固定床气化炉应用的前景和改进的方向。

Gasification technology is the key technology of SNG project,it will affect the energy efficiency,coal consumption,cost and economic benefits of the project.Fixed bed gasification and entrained flow gasification technology are mature and widely applied.Though the technical and economic comparison of two gasification technologies in SNG project,some guidance are provided for gasification technology selection of SNG project.Based on the analysis of the technical route of SNG project and the characteristics of two types of gasification technology,the technical application advantages and disadvantages in SNG project are discussed,also the investment and economic benefits are compared and analyzed with the example of DATONGSNG project.The result show that fixed bed gasification technology has the obvious advantages in investment,production cost and economic benefits.Entrained flow gasification technology has some advantages in equipment scale promotion and swage treatment.Generally,the fixed bed gasification technology is more suitable for the SNG project.In the end,the application prospect and improvement direction of fixed bed gasifier are analyzed.