Oil filter air bubbles by vacuumAt the request of certain vacuum from top of the oil, after the introduction of a large number of polluting gases, to produce a small amount of thin "bubble" pressure well below the saturation water vapor pressure parting in oil and gas, water vapor and other gases through "bubble" wall "bubble" which evaporates.
with the "void" oil keeps rising and extend these mass transfer processes constantly implemented. A small amount of "void" sport is the process of interface area to keep extending and interface keeps updating process, parting effect significant progress.
strengths: wide field of application, disposal rate, not changing the oil, high precision, equipment operation
defect: one-time participation is high, do not apply to small-owned factory