A model describing the absorption process of SO2 into limestone slurry with a spray scrubber is presented. Both the physical performance of the spray liquid in the scrubber and the involved chemical reactions are anal...A model describing the absorption process of SO2 into limestone slurry with a spray scrubber is presented. Both the physical performance of the spray liquid in the scrubber and the involved chemical reactions are analyzed in the model. A con- tinuous concentration change of H+ was solved by iterative coupling using Matlab, and it was found that there was a remarkable influence on the concentration of the other elements in the process of SO2 absorption. The calculations show that the enhancement factor exponentially grows with an increasing value of pH and logarithmically decays with an increasing value of the driving force. To verify the accuracy of the model, experiments were also carried out, and the results suggest that the model, after combining the physical performance of the spray and the enhancement factor, can more precisely describe SO2 absorption in a spray scrubber. Furthermore, a commercial computational fluid dynamics (CFD) tool is used to perform several simulations which describe and clarify the effects of variables on SO2 absorption. The results of numerical simulation can provide a basis for further design and optimization of the scrubber.展开更多
The acute respiratory distress syndrome （ARDS） is defined by noncardiogenic pulmonary edema and acute respiratory failure in the seriously ill patients. It represents the serious pulmonary response to a broad range ...The acute respiratory distress syndrome （ARDS） is defined by noncardiogenic pulmonary edema and acute respiratory failure in the seriously ill patients. It represents the serious pulmonary response to a broad range of severe injuries occurring either directly to the lung or as the consequence of injury or inflammation at other sites in the body. With the great advance in the treatment of serious diseases such as severe trauma, shock and sepsis, many patients do not die of original diseases but develop ARDS, which makes the incidence of ARDS increase. Results from a recent thorough epidemiological study conducted in Seattle suggested ARDS incidence figure of 59 cases per 100000 inhabitants/year.展开更多
基金Project supported by the National Key Technologies Supporting Program of China during the 11th Five-Year Plan Period (No.2006BAA01B04)the New Century Excellent Talent in University(No. NCET-06-0513), China
文摘A model describing the absorption process of SO2 into limestone slurry with a spray scrubber is presented. Both the physical performance of the spray liquid in the scrubber and the involved chemical reactions are analyzed in the model. A con- tinuous concentration change of H+ was solved by iterative coupling using Matlab, and it was found that there was a remarkable influence on the concentration of the other elements in the process of SO2 absorption. The calculations show that the enhancement factor exponentially grows with an increasing value of pH and logarithmically decays with an increasing value of the driving force. To verify the accuracy of the model, experiments were also carried out, and the results suggest that the model, after combining the physical performance of the spray and the enhancement factor, can more precisely describe SO2 absorption in a spray scrubber. Furthermore, a commercial computational fluid dynamics (CFD) tool is used to perform several simulations which describe and clarify the effects of variables on SO2 absorption. The results of numerical simulation can provide a basis for further design and optimization of the scrubber.
基金the National Natural Science Foundation of China(No.30300465)
文摘The acute respiratory distress syndrome （ARDS） is defined by noncardiogenic pulmonary edema and acute respiratory failure in the seriously ill patients. It represents the serious pulmonary response to a broad range of severe injuries occurring either directly to the lung or as the consequence of injury or inflammation at other sites in the body. With the great advance in the treatment of serious diseases such as severe trauma, shock and sepsis, many patients do not die of original diseases but develop ARDS, which makes the incidence of ARDS increase. Results from a recent thorough epidemiological study conducted in Seattle suggested ARDS incidence figure of 59 cases per 100000 inhabitants/year.
