With the aim of controlling the problem of fine particles in the flue gas of lead-zinc smelting,a low-temperature plasma-electrocoagulation and electric bag composite dedusting experimental platform was designed by co...With the aim of controlling the problem of fine particles in the flue gas of lead-zinc smelting,a low-temperature plasma-electrocoagulation and electric bag composite dedusting experimental platform was designed by combining electrocoagulation and electric bag composite dust removal technology based on the research of low-temperature plasma technology.Firstly,the properties of fine particles in flue gas from lead-zinc smelting were analyzed,and the effects of input voltage,filter wind speed,dust concentration,and pulse-jet ash-cleaning cycle on the dust collection efficiency of the integrated device were studied.Then,the energy efficiency of the integrated technology was analyzed,and the control mechanism of the fine particles was revealed.The experimental results show that the integrated technology of low-temperature plasma-electrocoagulation and electric bag composite dust removal achieves a fine particle removal efficiency of more than 99.99%and the energy consumption per unit mass of the dust is only 0.008 k W·h/g.The integrated technology has broad application prospects and farreaching practical significance for the lead-zinc smelting industry to achieve ultra-low emission targets for flue gas and achieve energy-saving and emission reduction effects.展开更多
为了促进污染物协同控制和超低排放的实现,简化烟气脱硫除尘工艺,为选择性催化还原法(selective catalytic reduction,SCR)脱硝创造适宜的烟气条件,利用烟气干法脱硫除尘一体化装置,研究了碳酸氢钠干法脱硫的温度、钠硫比(stoichiometri...为了促进污染物协同控制和超低排放的实现,简化烟气脱硫除尘工艺,为选择性催化还原法(selective catalytic reduction,SCR)脱硝创造适宜的烟气条件,利用烟气干法脱硫除尘一体化装置,研究了碳酸氢钠干法脱硫的温度、钠硫比(stoichiometric ratio of sodium bicarbonate to sulfur,NSR)、入口SO2质量浓度、Na HCO3粒径和粉尘质量浓度等因素对脱硫效率的影响,对装置的脱硫性能做出评价,最佳脱硫效率达到95%以上.实验结果表明:温度、NSR为主要影响因素,在130~200℃温度范围内,脱硫效率随温度的升高呈先下降后保持稳定的趋势;随着NSR的增大,效率呈先增加后保持稳定的规律;入口SO2的质量浓度为1000~2000 mg/m3,脱硫效率随入口质量浓度的增大而有所增加;粒径较小的NaHCO3颗粒脱硫效率更好;烟气中的粉尘在一定程度上能够促进脱硫反应的进行.展开更多
基金supported by the State Key Laboratory of Organic Geochemistry,GIGCAS(No.SKLOG-201909)the Fundamental Research Funds for the Central Universities(2009QH03)funded by the Open Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation(under planning).
文摘With the aim of controlling the problem of fine particles in the flue gas of lead-zinc smelting,a low-temperature plasma-electrocoagulation and electric bag composite dedusting experimental platform was designed by combining electrocoagulation and electric bag composite dust removal technology based on the research of low-temperature plasma technology.Firstly,the properties of fine particles in flue gas from lead-zinc smelting were analyzed,and the effects of input voltage,filter wind speed,dust concentration,and pulse-jet ash-cleaning cycle on the dust collection efficiency of the integrated device were studied.Then,the energy efficiency of the integrated technology was analyzed,and the control mechanism of the fine particles was revealed.The experimental results show that the integrated technology of low-temperature plasma-electrocoagulation and electric bag composite dust removal achieves a fine particle removal efficiency of more than 99.99%and the energy consumption per unit mass of the dust is only 0.008 k W·h/g.The integrated technology has broad application prospects and farreaching practical significance for the lead-zinc smelting industry to achieve ultra-low emission targets for flue gas and achieve energy-saving and emission reduction effects.
文摘为了促进污染物协同控制和超低排放的实现,简化烟气脱硫除尘工艺,为选择性催化还原法(selective catalytic reduction,SCR)脱硝创造适宜的烟气条件,利用烟气干法脱硫除尘一体化装置,研究了碳酸氢钠干法脱硫的温度、钠硫比(stoichiometric ratio of sodium bicarbonate to sulfur,NSR)、入口SO2质量浓度、Na HCO3粒径和粉尘质量浓度等因素对脱硫效率的影响,对装置的脱硫性能做出评价,最佳脱硫效率达到95%以上.实验结果表明:温度、NSR为主要影响因素,在130~200℃温度范围内,脱硫效率随温度的升高呈先下降后保持稳定的趋势;随着NSR的增大,效率呈先增加后保持稳定的规律;入口SO2的质量浓度为1000~2000 mg/m3,脱硫效率随入口质量浓度的增大而有所增加;粒径较小的NaHCO3颗粒脱硫效率更好;烟气中的粉尘在一定程度上能够促进脱硫反应的进行.