THE EMISSIONS OF PAHS AND HEAVY METALS FROM CO-COMBUSTION OF PETROCHEMICAL SLUDGE WITH COAL IN CFB INCINERATOR
The polycyclic aromatic hydrocarbons (PAHs) and heavy metals (Hg, Pb, Ni, Cr, Cu, Zn) emission characteristics in flue gas from co-combustion of petrochemical sludge and coal were investigated in a pilot-scale circulating fluidized bed (CFB) incinerator with a thermal input of 0.2 MW. Experimental results show that when mass ratio of petrochemical sludge/coal increases from 10％ to 40％, PAHs, Hg and Zn emissions increase, while Pb and Ni emissions decrease. Mass mixing ratio has no obvious effect on the emissions of Cr and Cu. As combustion temperature increases, PAHs emission decreases at first and then increases, there is an optimum combustion temperature inhibiting PAHs formation, while emissions of Hg, Pb, Cu, Zn increase relatively rapidly. With Ca/S molar ratio increasing, PAHs, Hg, Pb, Ni, and Cu emissions decrease due to adsorption by calcium sorbents. Limestone is effective in adsorbing Pb and Ni, while lime is suitable to adsorb Hg and Cu. However, Ca/S molar ratio doesn’t have much influence on the emissions of Cr and Zn. Some combustion parameters are recommended based on stable combustion and low pollutant emission.
petrochemical sludge circulating fluidized bed (CFB) polycyclic aromatic hydrocarbons (PAHs) heavy metals
Ge Zhu Changsui Zhao Huichao Chen Xiaoping Chen Cai Liang
School of Energy and Environment, Southeast University, Nanjing, 210096, China
国际会议
第20届国际流化床燃烧会议(20th International Conference on Fluidized Bed Combustion)
西安
英文
1048-1053
2009-05-18（万方平台首次上网日期，不代表论文的发表时间）