热功率60MW/30MW的生物质气化系统布置方案分析与选择

Analysis and Selection of 60MW/30MW Biomass Gasification System Layout Scheme

以热功率60MW/30MW生物质气化炉与660MW燃煤机组锅炉共燃耦合发电(对应发电功率20MW/10MW)为例,从工程应用和项目示范性角度,对负压/正压单循环流化床气化系统、循环流化床与固定床的气化-热解串床气化系统、双循环流化床的燃烧-气化串床系统的布置方案进行具体分析、论证和比较。对于设计燃料为多品种类生物质,认为"正压循环流化床气化炉+换热器"布置和"正压循环流化床+正压固定床+半焦回床/直排"布置为可选优化方案。项目实施后将对生物质气化与燃煤锅炉共燃耦合发电起到重要的示范性作用。

The 20 MW/10 MW combined electricity generate system is studied which contents the biomass gasifier with the thermal power 60 MW/30 MW and the 660 MW coal fired boilers.In the negative-positive pressure single circulating fluidized bed gasification system,the circulating fluidized bed and fixed,bed system which tandem the two functions gasification and pyrogenic decomposition,the dual circulating fluidized bed combustion,gasification tandem bed system,specific analysis,argumentation and comparison are carried out from the engineering application and project demonstration perspective for the system＇s layout scheme.For variety of biomass fuel,‘the positive pressure circulating fluidized bed gasifier and heat exchanger system＇,and‘the positive pressure circulating fluidized bed＋positive pressure fixed bed＋semi-coke back bed/straight row system＇are considered as alternative optimize scheme.After the implementation of the project,it will make important demonstration effect on the coupling of biomass gasification and coal combustion boilers.