煤粉锅炉掺烧石油焦燃烧污染物排放特性的研究

对煤粉锅炉掺烧石油焦的污染物排放特性作了较详细的研究.煤焦粉的细度对燃烧性能影响很大,因而间接地影响NO_x,SO₂排放;煤焦掺混比以及煤、焦各自的含氮、硫量对NO_x,SO₂排放影响明显;烟气中SO2的浓度随过量空气系数α的增大而减少,过量空气系数α在1.3～1.4之间时,烟气中NO_x的浓度最高.现场调试结果与实验室试验结果基本一致.实际应用中应综合考虑煤焦粉细度、煤焦掺混比以及煤焦中含氮、硫量对其燃烧特性以及NO_x,SO₂排放的影响,以确定合适的细度及煤焦掺混比投入生产运行中. 

Research on Emission Characteristics of Combustion Pollutant in Coal-Pulverized Boiler Mixing Petroleum Coke

The article mainly studies emission characteristics of combustion pollutant after mixing petroleum coke in coal-pulverized boiler.The mixture particle size influences its combustion properties,and thus indirectly effects NO\-x and SO\-2 emission.The SO\-2 concentration of flue gas becomes higher and higher with increasing excess air coefficient,and when the excess air coefficient is between 1.3 and 1.4,the concentration of NO\-x in flue gas reaches the highest.The combustion adjustment results in power plant are in agreement with experimental results in the laboratory.In order to decide appropriate particle size and mixing ratio in practical production in coal-fired power plant,we should consider comprehensively how the particle size,ratio and content (N and S) of mixture influence combustion properties and emission of NO\-x and SO\-2.