石煤流化床燃烧重金属排放特性试验研究

Experimental research on heavy metals emission from fluidized bed with stone coal fired

介绍了石煤流化床燃烧重金属排放特性及灰渣中重金属溶出特性的试验研究 .研究结果表明 ,石煤燃烧后大部分汞随烟气排出 ,而其余重金属则大部分留于灰渣中 ;加入石灰石有助于抑制汞蒸汽的排放 ;烟气中汞浓度低于垃圾焚烧污染控制国家标准 ;灰渣及其水泥制品中的重金属不会对水体造成污染 .

Experimental researches are carried out on the characteristics of heavy metals emission from fluidized bed with stone coal fired and dissolution of heavy metals in ashes. It is found that most of mercury in coal vent with flue gas after combustion of stone coal, but most of other heavy metals remain in ashes. Addition of limestone will be very helpful for reducing mercury emission with flue gas. Measurement results show that mercury concentration in flue gas from fluidized bed with stone coal fired is under the related value in the national standard of emission control of MSW incinerator. Also heavy metals in ash and its cement products are not at high risk of exposure and effects on aquatic ecosystems.