多级闪蒸工艺在高炉煤气脱碳工艺中的应用  

Application of multi-stage flash evaporation process in blast furnace gas decarburization process

作　　者：张宝珠 屈慧珠 王腾飞 金锋 付艳鹏 王振林 刘西琨 ZHANG Baozhu;QU Huizhu;WANG Tengfei;JIN Feng;WANG Zhenlin;LIU Xikun(Sinosteel Equipment&Engineering Co.,Ltd.,Beijing 100080,China)

机构地区：[1]中钢设备有限公司,北京100080

出　　处：《能源化工》2025年第1期65-68,共4页Energy Chemical Industry

摘　　要：冶金工业作为能源消耗密集型且碳排放量大的产业,为实现“双碳”目标,各冶金企业积极探索低碳减排创新路径,在工程项目中应用CO_(2)脱除技术。高炉煤气脱碳具有气量大、CO_(2)含量高、压力较低、CO_(2)脱除精度要求低等特点,基于这些特点优先选择胺法脱碳,且在已实施流程中,富液再生系统采用多级闪蒸及热解吸并行方式以节能降耗。本文以实施项目为例,分析胺法脱碳的多级闪蒸工艺流程,探讨该流程中CO_(2)脱除量的影响因素,包括压力对高压闪蒸区、低压闪蒸区和热解吸性能的影响。研究结果表明,多级闪蒸脱除CO_(2)量约占45%,主要在低压闪蒸区完成;热解吸虽能脱除CO_(2)但会伴随大量水的脱除,降低压力会增加蒸汽消耗;对于多级闪蒸工艺流程,低压闪蒸和热解吸的压力选择自然条件下可达到的最小压力时,CO_(2)脱除较为经济。As an energy intensive and carbon intensive industry,the metallurgical industry actively explores innovative lowcarbon emission reduction paths and applies CO_(2) removal technology in engineering projects to achieve the "dual carbon" goal.The decarbonization of blast furnace gas has the characteristics of large gas volume,high CO_(2) content,low pressure,and low requirements for CO_(2) removal accuracy.Based on these characteristics,amine based decarbonization is preferred.In the implemented process,the rich liquid regeneration system adopts multi-stage flash evaporation and thermal desorption parallel methods to save energy and reduce consumption.The implementation of a project is taken as an example to analyze the multi-stage flash evaporation process of amine based decarbonization,and the influencing factors of CO_(2) removal are explored in this process,including the influence of pressure on the highpressure flash evaporation zone,low-pressure flash evaporation zone,and thermal desorption performance.The research results show that the removal of CO_(2) by multi-stage flash evaporation accounts for about 45%,mainly completed in the low-pressure flash evaporation zone.Although thermal desorption can remove CO_(2),it will be accompanied by a large amount of water removal,and reducing pressure will increase steam consumption.For the multi-stage flash evaporation process,when selecting the minimum pressure achievable under natural conditions for low-pressure flash evaporation and thermal desorption,CO_(2) removal is more economical.

关 键 词：胺法脱碳 Aspen软件模拟 多级闪蒸 

分 类 号：TQ028.2[化学工程]