生物质气化与微型燃气轮机联合发电系统模拟分析  

Simulation of Biomass Gasification Coupled with Micro Gas Turbine Power Generation System

作　　者：张小桃[1] 黄雪琦 ZHANG Xiaotao;HUANG Xueqi(North China University of Water Resources and Electric Power,Zhengzhou 450045,China)

机构地区：[1]华北水利水电大学,郑州450045

出　　处：《能源研究与管理》2021年第3期48-52,共5页Energy Research and Management

基　　金：河南省高等学校重点科研项目“基于再燃技术的燃煤锅炉耦合生物质气系统特性研究”(21A480006)。

摘　　要：为了研究不同生物质对生物质气化与微型燃气轮机联合发电系统运行特性的影响,搭建了联合发电系统的模型。以木屑、秸秆、食物垃圾为原料,气化过程确定了这3种生物质的最佳空燃比依次为1.4、1.6、1.9,将相应条件下的生物质气作为微型燃气轮机的燃料,研究生物质气初温变化对燃气轮机及联合发电系统运行性能的影响。在机组输出功率为额定值时,生物质气初温由环境温度升高到450℃,所需要的生物质流量减小,联合发电系统净效率增加;在保持燃气轮机输出功不变的条件下,增设回热器,引起燃烧室出口温度升高,排烟温度降低,燃料流量减少,燃气轮机发电效率和联合发电系统净效率增大;增设回热器及提高生物质气初温均有利于减少联合发电系统中SO2、SO3的排放且不利于减少NO的排放。In order to study the influence of different biomass on the operation characteristics of biomass gasification coupled with micro gas turbine power generation system,the model of combined power generation system was built.Taking sawdust,straw and food waste as raw materials,the best air-fuel ratio of this three kinds of biomass was determined as 1.4,1.6 and 1.9 respectively.The biomass gas under corresponding conditions was used as the fuel of micro gas turbine,the influence of initial temperature of biomass gas on the operation performance of gas turbine and combined power generation system was studied.When the output power of the unit is rated,and the initial temperature of biomass gas increases from ambient temperature to 450℃,the required biomass flow decreases,and the net efficiency of the combined power generation system increases.Under the condition of the constant gas turbine output,adding a regenerator can result in the increase of combustion chamber outlet temperature,the decrease of turbine exhaust temperature,and the increases of gas turbine power generation efficiency and the net efficiency of the combined power generation system.The addition of regenerator and the increase of biomass gas initial temperature are beneficial to the reduction of SO2 and SO3 emissions and unfavorable to the reduction of NO emissions in the co-generation system.

关 键 词：生物质气化 微型燃气轮机 生物质气初温 回热器 

分 类 号：TK6[动力工程及工程热物理—生物能]