The emission of sulfur dioxide in flue gases is an important problem in industry involving combustion of coal The wet scrubbing process using lime/limestone slurry as the scrubbing medium is currently the dominant tec...The emission of sulfur dioxide in flue gases is an important problem in industry involving combustion of coal The wet scrubbing process using lime/limestone slurry as the scrubbing medium is currently the dominant technology for the flue gas desulfurization Due to the presence of numerous ionic and neutral species in the slurry, the chemical reactions involved in the slurry upon absorption of sulfur dioxide are complex In this paper, a method of measuring the sulfur dioxide absorption in multi-component suspensions was developed and the characteristics of sulfur dioxide absorption were investigated The results show that different additives chosed in the experiment can improve the ability of SO2 absorption As to the same additive, the improvement effect is differ with different concentration For the magnesium hydroxide additive, its optimum concentration is 1×10 -4*#mol/L Experiment results suggested that dissolved sulfur dioxide reacts mainly with the magnesium sulfite ion pair which is responsible for the increased absorption rate of SO2 However, when CO 2-3 or SO 2-4 anions are present in the solution, the catalytic effect of magnesium hydroxide precipitate on sulfur dioxide absorption reduces According to the experiments, absorbents with better performance can be optimized to be applied in semi-dry or wet FGD process to raise SO2 removal展开更多
采用MZ酸性染料和反应型紫外吸收剂UV-SUN CEL LIQ对锦纶织物进行染色和抗紫外整理一浴加工,探究了染料、紫外吸收剂用量,浸渍p H、温度和时间对染色和整理后锦纶织物K/S值和UPF的影响,测试了锦纶织物的耐洗性能。结果表明:中浅色锦纶...采用MZ酸性染料和反应型紫外吸收剂UV-SUN CEL LIQ对锦纶织物进行染色和抗紫外整理一浴加工,探究了染料、紫外吸收剂用量,浸渍p H、温度和时间对染色和整理后锦纶织物K/S值和UPF的影响,测试了锦纶织物的耐洗性能。结果表明:中浅色锦纶织物需进行紫外线防护整理,随着紫外吸收剂用量增加,织物的UPF值增大,但K/S值明显降低;随着温度的升高和时间的延长,K/S值和UPF均增大;随着p H的增大,锦纶的K/S值和UPF均降低。当酸性染料0.5%(omf),紫外吸收剂5%(omf)时,对锦纶织物染色和整理一浴的最佳工艺为:p H=4,100℃保温60 min。经染色和整理后锦纶抗紫外效果较好,且耐洗性优良。展开更多
文摘The emission of sulfur dioxide in flue gases is an important problem in industry involving combustion of coal The wet scrubbing process using lime/limestone slurry as the scrubbing medium is currently the dominant technology for the flue gas desulfurization Due to the presence of numerous ionic and neutral species in the slurry, the chemical reactions involved in the slurry upon absorption of sulfur dioxide are complex In this paper, a method of measuring the sulfur dioxide absorption in multi-component suspensions was developed and the characteristics of sulfur dioxide absorption were investigated The results show that different additives chosed in the experiment can improve the ability of SO2 absorption As to the same additive, the improvement effect is differ with different concentration For the magnesium hydroxide additive, its optimum concentration is 1×10 -4*#mol/L Experiment results suggested that dissolved sulfur dioxide reacts mainly with the magnesium sulfite ion pair which is responsible for the increased absorption rate of SO2 However, when CO 2-3 or SO 2-4 anions are present in the solution, the catalytic effect of magnesium hydroxide precipitate on sulfur dioxide absorption reduces According to the experiments, absorbents with better performance can be optimized to be applied in semi-dry or wet FGD process to raise SO2 removal