面向环境应用的超重力反应器强化技术: 从理论到工业化
摘要
Sour gaseous pollutants released from the industrial tail or flue gas are the key source leading to serious environmental pollution. To meet the newly national regulation of the ultra-low emission limitation control of those sour gaseous pollutants in China, a new process intensification technology based on the high-gravity reactor(HGR)was proposed. The intensification principles and routes of the high-gravity reactor for sour gas separation by reactive absorption were elucidated and verified from lab scale to fully industrial scale. The higher selectivity of removal of SO<sub>2</sub>, H<sub>2</sub>S and CO<sub>2</sub> from acidic gas mixtures could be realized by high-gravity technology using its advantages of intensifying mass transfer by orders of magnitude as well as the ultra-short residence time. Thus the ultra-low emission of sulfide was guaranteed by using HGR technology. A three-in-one scale-up method, i.e. "scientific experiments+mechanism model at microscale+CFD simulation at macroscale" of HGR was proposed and verified by industrialization practice. The largest scale high-gravity reactor(rotor diameter 3.5 m, casing diameter 5 m, capacity for gas flowrate 20×10<sup>4</sup> Nm<sup>3</sup>/h)in the world was developed and successfully implemented in the industrialization application of desulfurization. This breakthrough technology of process intensification has been now widely accepted and applied in industries for removing SO<sub>2</sub> from tail gas and H<sub>2</sub>S from petroleum or natural gases, as well as CO<sub>2</sub> capture from flue gas of power plants, etc. The case studies of them were reviewed in this work.