This invention belongs to the field of C5 fraction
separation technology, and discloses a C5 fraction refining
system and a method for refining
pentane foaming agent using it. The C5 fraction refining
system includes: a heavy-reduction thickening
tower, a refining
tower, a condensate tank, an azeotropic agent injection line, and a finished product collection pipeline. The C5 fraction refining
system provided by this invention can remove most of the target impurities in the heavy-reduction thickening
tower, effectively reducing the number of trays in the refining tower, lowering equipment investment costs, simplifying the structure, reducing the likelihood of internal blockage, and extending the equipment's
operating cycle. The
pentane foaming agent refining method provided by this invention can effectively improve the quality of the
pentane foaming agent, increasing pentane purity from approximately 50% to over 70%, completely removing DMF, and reducing the content of
chlorine elements such as
ammonium chloride to less than 10 ppm, as low as below 5 ppm.