It is very much possible to recompress the vented low-pressure steam to a usable level medium-pressure steam using some high-pressure steam.  Generally, a thermo-compressor (steam ejector) is designed to suit the steam system conditions where it is going to be installed. Thermo-compressor systems are already installed and working at several process industries.  Paper machines are the most common application for thermo-compressor systems.
 
While a mechanical recompression system is also possible, we have rarely seen mechanical recompressors in steam service.
 
Also before proceeding to a thermo-compressor, we have to exhaust all the practical options of low-pressure steam utilization.