Novel Impinging Streams Absorber
Chemical absorption is a category of gas-liquid reactions, and is usually preferred for enhancing processes, provided possible. Many kinds of reactions may be involved in chemical absorption. According to Danckwerts, the enhancing parameter M can be used to identify the nature of chemical reaction in liquid phase, and M ≥3 indicates very fast or instant reaction and, consequentially, the process would be controlled by diffusion through gas-film. Impinging streams, as a novel technology in chemical engineering, have been demonstrated to enhance transfer between phases very efficiently, and should it be especially applicable for absorption processes with M ≥3. Based on the investigations supported by The National Natural Science Foundation of China, the Impinging Stream Gas-Liquid Reactor (ISGLR) was developed, and was used for a pilot plant test of wet desulfurization of flue gas as the absorber, with dehydrated lime as the absorbent. The results indicate that ISGLR has excellent performance, and the volumetric mass transfer coefficient, kGa, at the impinging velocity u0 ranged from 5.53 to 16.62 m/s, is in the range of 0.577 to 1.037 s 1, which are as high as those in the rotary packed bed (RPB), another well-known category of devices also enhancing transfer between phases very efficiently. For application to the cases of huge gas amount, such as desulfurization of flue gas from coal burning, the Huge Flowrate Impinging Stream Gas-liquid Reactor has been designed out with both the methods of scale-up and number-up, which is being applied industrially.
Impinging streams Gas-liquid reaction Absorption Flue gas desulfurization
Yuan Wu
School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 4 30073, China
国际会议
The 5th International Conference on Separation Science and Technology(第五届国际分离科学与技术会议)
北京
英文
2007-10-14（万方平台首次上网日期，不代表论文的发表时间）