Impingement zone major active region

A theoretical analysis is helpful for understanding the basic characteristics of impinging stream processes and the performances of the related devices. In an impinging stream device, where the residence time distribution of particles is most important is in the impingement zone, because this zone is the major active region for heat and mass transfer between phases in such a device. Unfortunately, it is basically... 

Back-mixing in the impingement zone, the major active region for heat and mass transfer, is critical. This may be favorable for some processes while it is harmful for others since back-mixing usually results in a decreased mean driving force for the processes involved ... 

There exists strong mixing in the major active region for transfer, i.e., the impingement zone ... 

The major active region in impinging stream equipment (the impingement zone) is only a thin layer with a diameter 8-10 times that of the gas conduit and a thickness of about a quarter to a half of the impinging distance, so when only one pair of impinging streams is used the utilization factor of the space is very low. The addition of another pair of impinging streams approximately doubles the utilization factor of the space and doubles the gas flow rate that can be processed in the sub chamber for absorption. 

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