工业废气再利用的碳减排潜力分析

Potential Analysis of Industrial Waste Gas Recycling in CO_2 Emission Reduction

中国CO2排放量与工业废气排放量之间具有很高的相关性,废气量减排是实现CO2减排的重要手段和切入点,有必要开展深入研究。根据能量平衡的原理,建立了余热利用、余压利用和含热值气体再利用等碳减排计算方法,简述了现有的钢铁烧结机烟气循环技术、水泥窑协同处理生活垃圾和市政污泥技术以及电解铝烟气阶梯利用于火电厂技术,并对以上主要行业废气再利用的碳减排量进行了计算和分析。结果表明,主要工业行业的废气再利用技术可以减少废气量排放,进而减少CO2排放,对于实现中国CO2减排目标的贡献接近1/4。废气再利用技术对减少CO2排放具有重要作用,应作为实现2020年减排目标的重要技术途径,大力推广发展。

There was significant correlation between China′s industrial waste gas emission and carbon emission, and it is necessary to further study the waste gas emission reduction which is the important approach and key breakthrough point to realize carbon emission reduction.A carbon emission reduction calculation method was set up for the waste heat utilization, the waste pressure utilization and the recycling of waste gas with heat value based on the energy balance principle.The current technologies of waste gas recycling of sintering machine, cement kiln cooperative treatment of domestic wastes and municipal sludge, and exhaust gas cascade utilization of electrolytic aluminum industry to coal-fired power plants were introduced.The corresponding carbon emission reductions by waste gas recycling in these industries were calculated and analyzed.The results showed that the industrial waste gas recycling technologies could reduce emission of waste gas volume and thus reduce emission of CO2 , contributing to almost 25%of the total carbon emission reduction in China.The technologies should play an important role in waste gas emission and CO2 emission reduction, and be the important approach to realize carbon emission reduction target in 2020.Therefore, the development of the waste gas recycling technologies should be strengthened.