为进一步控制燃油设备的排放污染，采用自制的在线乳化燃油燃烧系统，对不同含水量和过量空气系数共15个工况下的乳化油进行了燃烧试验，并进行定量分析。试验结果表明：乳化燃油含水率和过量空气系数对烟气污染物排放量有很大影响。随着乳化油含水量的增多，NO浓度不断降低；含水量达到5%时，SO2 浓度最低；含水率达到10%时，烟尘浓度最低；含水量达到20%时，NO2 浓度最低，H2 浓度达到最高，同时排烟温度达到最高；CO、CO2 浓度随含水量不同变化不大。过量空气系数越大，总体上烟气污染物浓度越低，而排烟温度反而越高。综合各试验工况，当含水率为20%，过量空气系数为1.3时，为最佳排烟工况，NOx 浓度较乳化前降低31%，SO2 降低28%，烟尘浓度降低了57%。

Fifteen working conditions were studied quantitatively in an oil-fired boiler for combustion test,including different water-fuel ratios(0,5%,10%,20%,30%) and different excess air ratios (1.1,1.2,1.3) using an online self-developed emulsification equipment to further control fuel equipment emission.The results indicated that water-fuel ratio and excess air factor have a great influence on the flue gas emissions. With the increase of water ratio,NO concentration decreases constantly. When water ratio is 5%,SO2 concentration reaches its minimum. With water ratio of 10%,dust concentration reaches its minimum.When water ratio is 20%,NO2 concentration is in the lowest level,while H2 concentration is in the highest level,and at the same time the exhaust smoke temperature reaches the highest level. CO and CO2 concentrations change unnoticeably with different water ratio. As excess air factor increases,the flue gas pollutant concentrations decrease,while the exhaust temperature increases.The optimal working condition is water-fuel ratio 20% and excess air ratio 1.3,with NOx,SO2,and dust concentration reduction of 31%,28% and 57%,respectively.

TK121

山东省自然科学基金资助项目(ZR2014EEP026)