基于空间分析方法的我国燃煤耦合生物质发电潜力分析

Potential analysis of coal-biomass co-firing power generation in China based on a spatial analysis method

燃煤耦合生物质发电可以降低燃煤电厂CO_(2)排放,减少空气污染。考虑秸秆资源能量密度较低等特点,燃煤耦合生物质发电技术的应用潜力很大程度上取决于燃煤电厂与秸秆资源在空间上的匹配程度。因此,从空间分析角度,研究燃煤耦合生物质发电潜力具有重要意义。基于高分辨率燃煤电厂与秸秆资源数据,采用空间匹配方法对燃煤耦合发电的可能潜力进行评价。结果表明,我国燃煤电厂与秸秆资源空间匹配程度较高,约89%的可收集秸秆位于燃煤电厂半径100 km以内。燃煤电厂可掺混秸秆量受秸秆可能源化利用率和电厂秸秆可掺混比例影响。秸秆可能源化利用率越高且电厂秸秆可掺混比例越高时,燃煤电厂可掺混的秸秆量越多。在秸秆高能源化利用率与30%掺混比例的情景下,1066个电厂可以在半径100 km以内找到可掺混的秸秆资源,其中约52.6%电厂可满足30%掺混比例。该情景下,电厂可消纳秸秆3.84亿t,减排CO_(2)约5.11亿t。相关结论可为我国燃煤耦合生物质发电技术支持政策以及秸秆能源化利用政策的制定提供技术支撑。

Coal-biomass co-firing power generation(CBCP)can reduce CO_(2) emissions and alleviate air pollution.Considering the low en⁃ergy density of straw resources,the application potential of coal-fired coupled biomass power generation technology largely depends on the spatial matching between coal-fired power plants and straw resources.Therefore,from the perspective of spatial analysis,it is of great sig⁃nificance to study the potential of coal-fired coupled biomass power generation.The possible potential of coal-fired coupled power genera⁃tion was evaluated by spatial matching method based on high-resolution coal-fired power plants and straw resource data.The research re⁃sults show that coal-fired power plants are highly spatial matched with straw resources in China,with about 89%of the collectible straw lo⁃cated within a 100 km radius of coal-fired power plants.The amount of co-fired straw in coal-fired power plants is affected by the energy utilization ratio of straw and the co-firing level of straw in power plants.The higher the energy utilization of straw is and the higher the cofiring level in power plants is,the more straw is that can be co-firing in coal-fired power plants.Under the scenario of the high energy uti⁃lization rate of straw and 30%co-firing level,1066 power plants can find straw resources within a radius of 100 km,of which 52.6%of power plants can meet the 30%co-firing level.In this scenario,the power plant can absorb 384 million ton of straw and reduce CO_(2) by about 511 million ton.The results can provide technical support for the formulation of technical support policies for coal-biomass co-firing power generation and straw resource utilization policies in China.