【摘要】 用氧化亚铁硫杆菌在生物膜填料塔进行液相催化氧化脱硫是一种新型的经济有效的方法。脱硫效率受多种因素影响。本文分别研究了 SO2 入口质量浓度、喷淋液 Fe2 +浓度、喷淋率、空塔气速及喷淋液循环使用对脱硫效率的影响。结果表明 ,在最佳操作条件 (SO2 入口质量浓度小于 2 0 0 0 mg/m3、喷淋液中 Fe2 + 浓度≥ 0 .0 6mol/L、喷淋率约为 12 L/m3h,空塔气速约为 0 .15 m/s)下 ,脱硫效率可达 96%以上。还分析了在反应器中培养基连续循环使用对脱硫效果的影响。在本实验条件下 ,当喷淋液循环使用 7次后 ,必须补充新鲜营养液 ,以保证较高的脱硫效率。更多还原

【Abstract】 The present author has done a series of experiments on the biological-membrane packed tower in obtaining the optimum processing condition of desulfurization. It has proved to be a new economical and effective desulfurization method in controlling SO₂ from flue gas by means of aqueous biological catalysis oxidation in the tower with Thiobacilus Ferrooxidans made of organic plastics, preparation equipment of simulating flue gas and circulating tanks of bacteria liquid. In this paper the authors mentioned such influential factors, as SO₂ inlet concentration, Fe²⁺ concentration of spray liquid, spray rate, superficial gas speed, and continuous operation time, which have been given respective analysis in the paper. The experimental results indicate that the optimum operation condition (SO₂ inlet concentration < 2 000 mg/m³, Fe²⁺ concentration of spray liquid ≥ 0.06 mol/L, spray rate about 12 L/m³h superficial gas speed about 0.15 m/s), can be achieved with SO₂ removal efficiency reaching 96%. In addition, the paper also analyzes some other influential factors on the removal efficiency when nutritious liquids are reused in biological-membrane packed tower. Under such circumstances, with the increase of recycling times, Fe²⁺ /Fe³⁺ and other nutrition are consumed more while the power of biological catalysis oxidation becomes weaker. And in turn the SO₂ removal efficiency falls. Just for this reason, it is necessary to refill fresh nutritious liquids above 7 times so as to keep higher SO₂ removal efficiency. From the above analysis, it can be concluded that the new technical tests can be used for SO₂ removal for its high desulfurization efficiency and lower cost, which makes the controlling method highly expectant and promising.更多还原