为实现对低压大气量废气中的污染物进行高效的分离与富集,开发了一种高气液比复合填料板,以空气-水为实验物系,对该复合填料板的压降和持液性能进行了研究。结果表明,复合填料板的干板压降Δp 与气相动能因子 F的关系符合幂函数关系,在...为实现对低压大气量废气中的污染物进行高效的分离与富集,开发了一种高气液比复合填料板,以空气-水为实验物系,对该复合填料板的压降和持液性能进行了研究。结果表明,复合填料板的干板压降Δp 与气相动能因子 F的关系符合幂函数关系,在相同喷淋密度(L=30.6 L m 2 h 1)条件下,复合填料板的动持液量较 BX500 填料的整体高了58~130 倍。在相同 L 条件下 F 从 3.2 增长到 6.5 m s 1 kg1/2 m 3/2,复合填料板的湿板压降增长了 162%~201%;而相同 F条件下 L 从 30 增长到 60 L m 2 h 1,湿板压降增长了 67%~108%。与普通填料相比,复合填料板在高气液比条件下表现出了低压降和高持液量的显著优势。展开更多
The hydrodynamic and mass transfer characteristics of a downflow liquid jet loop reactor (D-JLR) were studied experimentally with water/air and CMC (carboxymethyl cellulose) solution/air systems. The effects of the ge...The hydrodynamic and mass transfer characteristics of a downflow liquid jet loop reactor (D-JLR) were studied experimentally with water/air and CMC (carboxymethyl cellulose) solution/air systems. The effects of the geometry, the operating parameters and the physical properties of the liquid phase on gas hold-up and mass transfer coefficient were measuered. Compared with other types of gas-liquid reactor, D-JLR shows higher mass transfer coefficient and lower energy dissipation rate, the optimum diameter ratio was found to be about 0.42-0.6. A model for gas hold-up in D-JLR with Newtonian and non-Newtonian fluids has been developed on the basis of the equation of motion and the concept of average mixing length. The prediction of gas hold-up with the model agreed with the experimental results of this work.展开更多
文摘为实现对低压大气量废气中的污染物进行高效的分离与富集,开发了一种高气液比复合填料板,以空气-水为实验物系,对该复合填料板的压降和持液性能进行了研究。结果表明,复合填料板的干板压降Δp 与气相动能因子 F的关系符合幂函数关系,在相同喷淋密度(L=30.6 L m 2 h 1)条件下,复合填料板的动持液量较 BX500 填料的整体高了58~130 倍。在相同 L 条件下 F 从 3.2 增长到 6.5 m s 1 kg1/2 m 3/2,复合填料板的湿板压降增长了 162%~201%;而相同 F条件下 L 从 30 增长到 60 L m 2 h 1,湿板压降增长了 67%~108%。与普通填料相比,复合填料板在高气液比条件下表现出了低压降和高持液量的显著优势。
文摘The hydrodynamic and mass transfer characteristics of a downflow liquid jet loop reactor (D-JLR) were studied experimentally with water/air and CMC (carboxymethyl cellulose) solution/air systems. The effects of the geometry, the operating parameters and the physical properties of the liquid phase on gas hold-up and mass transfer coefficient were measuered. Compared with other types of gas-liquid reactor, D-JLR shows higher mass transfer coefficient and lower energy dissipation rate, the optimum diameter ratio was found to be about 0.42-0.6. A model for gas hold-up in D-JLR with Newtonian and non-Newtonian fluids has been developed on the basis of the equation of motion and the concept of average mixing length. The prediction of gas hold-up with the model agreed with the experimental results of this work.
