Jar is retrieved to rectification vacuum buffering

The utility model provides a jar is retrieved to rectification vacuum buffering, includes the vertical tank body, and a jar body upper end is equipped with the cover, is equipped with gas feed, gas outlet, pressure gauge interface, on -the -spot evacuation mouth on the cover, and open a jar body bottom has the emptying mouth, jar side face is equipped with and presss from both sides the cover, presss from both sides to sheathe in to be equipped with cooling water inlet or the export of steam condensate water, coolant outlet or steam inlet, the internal vertical division plate that is equipped with of jar, vertical division plate welds on the cover, and vertical division plate both sides symmetrical has oblique buffer board, is equipped with 2 rows of 8mm's hole to one side on the buffer board. The problem of among the 3, 5 - dichloroaniline distillation process, the 3, 5 - dichloroaniline that smugglies secretly in the high vacuum air current retrieves is solved, the effectual back level vacuum pump of having protected makes it the long -time running, has reduced 3, 5 - dichloroaniline's in the vacuum pump tail gas content, has the characteristics of reduction in production cost, environmental protection.