Nitrogen trifluoride batch rectification equipment

The invention belongs to the field of nitrogen trifluoride rectification, and relates to nitrogen trifluoride rectification equipment, in particular to nitrogen trifluoride batch rectification equipment which comprises a bottom frame, a barrel and a support, the barrel is fixedly connected to the bottom frame, a cover is arranged above the barrel, a liquid injection pipe is arranged on the cover, a liquid conveying pipe is installed on the liquid injection pipe, and the lower portion of the liquid conveying pipe is communicated with the liquid outlet end of a water pump; the bracket is mounted on the underframe and positioned on the right side of the barrel; the filtering device is mounted on the bottom frame; the filtering device comprises a supporting frame, a filtering box, a rotating column, a supporting plate and a dirt collecting groove, and the supporting frame and the filtering box are both fixedly connected to the bottom frame; the rotating column is coupled in the filter box, the support plate is fi