A high-efficiency sieve tray with bubble crusher was proposed. A layer of bubble crusher device was added in the height range of the foam layer on the sieve tray. The device could decrease the volume of the bubble and force the interphase to renovate

improve mass-transfer efficiency of trays in the trace distillation

and strengthen the gas-liquid mass transfer. The numerical simulation of gas-liquid two-phase flow field is carried out on the micro-bubble tray and sieve tray by Euler-Euler two fluid model

which was verified by test. The results showed that the bubble crusher device can effectively break the large bubbles

which made the gas distribution in those regions characterized by the small fraction of gas volume and evident back-mixing phenomenon more uniform

the regional area with large bubble content larger

and the gas hold-up distribution was gradient. The bubble crusher device in the foam layer can increase the interfacial area for vapour-liquid contact and residence time

improve the mass transfer efficiency and reduce the gas entrainment. The turbulence intensity near the bubble crusher device was high. The gas sprayed while large bubbles broken will further tear the liquid layer and increase the height of the foam layer

and bubble coalescence was restrained. The quick interphase renovation could enhance mass transfer process. The results can provide guidance for the design and optimization of industrial trays.