摘要
基于燃煤电厂二氧化硫排放现状及超低排放的要求,构建石灰石-石膏法脱硫费效计算模型,分别分析机组容量、年运行小时数、不同SO_2排放限值及托盘塔改造对成本效益的影响,以"费用最小化、效益最大化"为原则,寻求节能减排新途径。结果表明:在煤炭含硫量和脱硫效率一定时,100 MW、200 MW、300 MW、600 MW和1 000 MW机组的减排量分别为3.47万,5.5万,8.2万,15.5万,25万t,呈逐渐增大趋势,同时,费效比逐渐减小,说明大容量机组环境、经济效益明显;同一机组容量,脱硫成本与年利用时间呈负相关;SO_2排放标准越严格,吨SO_2脱除成本和单位发电量运行成本越高;托盘塔超低排放改造技术经济可行,费效比<1,减排效益明显,可作为燃煤电厂脱硫设施改造的重点技术。
Based on the status of sulfur dioxide emissions from coal-fired power plants and the requirements of ultra-low emissions,the paper constructed limestone gypsum desulfurization cost calculation model,analyzed the impact of unit capacity,operation hours,the limits of SO_2 emission,and the pallet tower transformation on cost-effectiveness,respectively.Following the ＂cost minimization,benefit maximization＂principle,new ways of energy saving and emission reduction were seeked.The result showed when the coal sulfur content and desulfurization efficiency was constant,the emission reductions of100 MW,200 MW,300 MW,600 MW and 1 000 MW units were 34 700,55 000,82 000,155 000,250 000 tons,respectively,showing a gradually increasing trend,at the same time,the cost ratio was gradually reduced,indicating that the environment and economic benefits of large capacity units were obvious; the cost of desulfurization and the operation hours were negatively correlated under the same unit capacity; the more stringent SO_2 emission standards was,the higher the tons of SO_2 removal costs and the unit operating costs were; pallet tower ultra-low emission transformation technology was economically viable,the ratio of cost to effectiveness was less than one,and the obvious emission reduction benefits could be used as a key technology in coal-fired boiler desulfurization facilities transformation.
出处
《环境工程》
CAS
CSCD
北大核心
2018年第1期97-102,共6页
Environmental Engineering
基金
国家电网科学技术项目:电网企业碳资产管理关键技术研究(SGTYHT/15-JS-191)
关键词
燃煤电厂
石灰石-石膏法脱硫
超低排放
费效分析
托盘塔技术
coal-fired power plants
limestone gypsum desulfurization
ultra low emissions
benefit-cost analysis
pallet towertechnology
