By using the fault tree analysis in reliability theory as the systematical analysis approach, the dust suppression mechanism in a spray system with wetting agent is shown in a logic tree and some graphical models. Fro...By using the fault tree analysis in reliability theory as the systematical analysis approach, the dust suppression mechanism in a spray system with wetting agent is shown in a logic tree and some graphical models. From these diagrams, all factors related to the spray system and their cause and effect relationship can be seen clearly. Based on the built logic tree, several mathematical models and new ideas for expressing the dust suppressing efficiency in the spray system are put forward. The significance of all factors related to the efficiency of suppressing dust is qualitatively described. Furthermore, the new concepts, such as, the effective reaction time between dust particle and droplet, the expansion phenomenon of laden dust droplet, the functions of volatile and the relative size distribution efficiency of wetting agent are presented. All this richenes the existing mechanism of dust abatement by spraying wetting agent. At last, several problems that need to be further investigated are also suggested in the paper.展开更多
Chemical agglomeration is one of the most effective methods to remove fine particles from coal fired power plants.The wetting of particles by agglomeration agent droplets plays an important role in the chemical agglom...Chemical agglomeration is one of the most effective methods to remove fine particles from coal fired power plants.The wetting of particles by agglomeration agent droplets plays an important role in the chemical agglomeration processes.The effect of wetter concentration and temperature on the wettability of the fly ash from Xiaolongtan power plant in three different wetting agents [sodium dodecyl sulfate(SDS),sodium dodecyl benzene sulfonate(SDBS) and Triton X 100(TX100)] was investigated.Laser particle size analyzer was used to determine the wettability of the fly ash.The results showed that only PM+10 was completely wetted by water,but PM+2.5 was wetted completely by 0.25% SDS solution,and PM+1 was wetted completely by both 1% SDS and 0.4%SDBS solutions under the experimental conditions.It was effective to wet the fly ash particles by dilute TX100 solution.With increasing temperature of wetter from 20℃ to 60℃,solution surface tension decreased and better wettability of the fly ash exhibited.Owing to the good performance of wetting agents investigated,this study identified some potential components for the synthesis of chemical agglomeration agents.展开更多
文摘By using the fault tree analysis in reliability theory as the systematical analysis approach, the dust suppression mechanism in a spray system with wetting agent is shown in a logic tree and some graphical models. From these diagrams, all factors related to the spray system and their cause and effect relationship can be seen clearly. Based on the built logic tree, several mathematical models and new ideas for expressing the dust suppressing efficiency in the spray system are put forward. The significance of all factors related to the efficiency of suppressing dust is qualitatively described. Furthermore, the new concepts, such as, the effective reaction time between dust particle and droplet, the expansion phenomenon of laden dust droplet, the functions of volatile and the relative size distribution efficiency of wetting agent are presented. All this richenes the existing mechanism of dust abatement by spraying wetting agent. At last, several problems that need to be further investigated are also suggested in the paper.
文摘Chemical agglomeration is one of the most effective methods to remove fine particles from coal fired power plants.The wetting of particles by agglomeration agent droplets plays an important role in the chemical agglomeration processes.The effect of wetter concentration and temperature on the wettability of the fly ash from Xiaolongtan power plant in three different wetting agents [sodium dodecyl sulfate(SDS),sodium dodecyl benzene sulfonate(SDBS) and Triton X 100(TX100)] was investigated.Laser particle size analyzer was used to determine the wettability of the fly ash.The results showed that only PM+10 was completely wetted by water,but PM+2.5 was wetted completely by 0.25% SDS solution,and PM+1 was wetted completely by both 1% SDS and 0.4%SDBS solutions under the experimental conditions.It was effective to wet the fly ash particles by dilute TX100 solution.With increasing temperature of wetter from 20℃ to 60℃,solution surface tension decreased and better wettability of the fly ash exhibited.Owing to the good performance of wetting agents investigated,this study identified some potential components for the synthesis of chemical agglomeration agents.
