摘要
Abstract
Under the background of the"double carbon"target,coal-fired coupled biomass power generation has become a key technical path to reduce carbon emissions from coal-fired power.Based on China's biomass re-source potential and the current situation of pure biomass power generation,this paper systematically analyzes the advantages of coal-electricity coupled biomass power generation:making full use of existing unit facilities,no need for additional land occupation,economic subsidy support,flexible fuel supply,breaking through param-eter restrictions,improving combustion stability,reducing pollutants and large-scale and efficient emission re-duction.The transformation range,blending ratio,investment cost and influence on boiler operation of three technical routes,such as direct coupling of fuel side,gasification coupling and steam side coupling,are dis-cussed.Thermogravimetric analysis reveals the chemical kinetic mechanism that biomass blending reduces the activation energy of fuel by 50％and promotes ignition,but leads to a slight decrease in boiler efficiency,and quantifies the influence on the power consumption of pulverizing,flue gas characteristics and ash resource utiliza-tion.A multi-objective economic optimization model is established,which confirms that the price of biomass fu-el and the duration of policy subsidy are the core parameters to determine the project yield,while the impact of carbon tax contribution is limited.The research shows that fuel direct blending technology is the most feasible large-scale carbon reduction scheme at this stage by virtue of its simplicity,economy and significant emission re-duction benefits.Its promotion needs the support of supporting biomass supply chain and subsidy mechanism.关键词
生物质/燃料侧耦合/蒸汽侧耦合/经济性Key words
biomass/fuel-side coupling/steam-sidecoupling/economy分类
能源科技
