Application of Polyurethane Curing Barn in Flue-cured Tobacco Production

[Objective] This study aimed to investigate the curing performance of polyurethane curing barn and reduce the cost of tobacco leaf flue-curing.[Method] The temperature control effect,curing effect and curing cost of polyurethane curing barn and traditional bulk curing barn were analyzed and compared.[Result] The results showed that there were no significant differences in curing performance between two types of curing barns.Horizontal temperature differences increased slightly as the temperature rose.Specifically,horizontal temperature differences between each layer ranged from 0.2 ℃ to 0.5 ℃.Both two types of curing barns exhibited uniform air distribution.Polyurethane curing barn exhibited stable vertical temperature differences.Both two types of curing barns presented good curing effects with slight differences.Polyurethane curing barn exhibited higher economic benefits,lower coal cost,lower electricity cost,lower labor cost and longer service life than traditional bulk curing barn,but its construction cost was higher.[Conclusion] Polyurethane curing barn exhibits better curing performance with good application prospects.