Combining with the high-gravity distillation column

single screw compressor and new heat pump technology

and then the concept of high-gravity heat pump distillation was proposed. Firstly

high-gravity heat pump distillation heat integrated system was designed and built

which treatment capacity was about 300 kg·h-1. Ethanol-water solution was taken as the actual research object. The single screw compressor was used to directly compress ethanol vapor. Afterwards

based on the full reflux experiments under the different rotational frequency of high-gravity distillation column

and different feed positions and reflux ratios experiments under the industrial condition

the changes of the affected parameters

energy-saving characteristics and economic benefits of the system were analyzed synthetically. Present results clearly show that the performance of the system is optimal when the frequency of high-gravity distillation column (fHG) is operated at 40 Hz. By moving down the feed position or increasing reflux ratio

mass fraction of the vapor at the top of the column (yD) can be improved. If only yD is considered

feed location 03 (FL03) is the best. In comparison with the low concentration of ethanol-water solution

it has a great advantage in treating the high concentration. In addition

energy-saving and economic benefits of the system are obvious

which can provide theoretical guidance for the high-gravity heat pump distillation in the selection

design and application of the ethanol distillation process.