降低造纸法再造烟叶烟气中焦油释放量的研究

Study on Reducing Tar Content in Flue Gas of Paper-making Reconstituted Tobacco

【目的】为寻找能够有效降低造纸法再造烟叶的焦油释放量的技术手段。【方法】系统考察了原料梗叶比例、打浆度、定量、涂布率、外加纤维比例、钾盐及碳酸钙等因素对PRT焦油释放量的影响,并对这些因素的降焦效果进行了验证。【结果】①打浆度、定量、外加纤维比例、钾盐及碳酸钙对造纸法再造烟叶的焦油释放量均有显著影响。②原料梗叶比对造纸法再造烟叶的焦油释放量也有一定影响,在梗叶比为2:1时再造烟叶的焦油释放量最低。③再造烟叶涂布率与其焦油释放量之间呈正相关关系,涂布率的增加会造成焦油释放量的增加。④集合了外加纤维比例、打浆度、定量因素制备的再造烟叶的焦油释放量下降了50%以上,且掺配于卷烟产品中也具有明显的降焦效果。【结论】再造烟叶焦油释放量可以通过调节工艺过程参数而降低,集成了降焦因素的PRT样品掺配到卷烟中,可使卷烟的焦油释放量大幅降低。因此,可综合考虑,适当采用这些具有降焦效果的技术条件来降低PRT的焦油释放量,并掺配于卷烟中实现“减害降焦”。

【Objective】The present paper aimed to search for some technical methods which could reduce the tar content of reconstituted to-bacco effectively.【Method】The effect of some factors such as ratio of stems to leaves,beating degree,basis weight,coating rate,proportion of plus fiber and calcium carbonate on the tar content of paper-making reconstituted tobacco was studied and those factors that could reduce the tar content effectively had also been verified.【Result】(i)Beating degree,basis weight,proportion of plus fiber,potassium salt and cal-cium carbonate had significant influence on the tar content of paper-making reconstituted tobacco;(ii)The ratio of stems to leaves of raw materials also had a certain influence on the tar content of paper-making reconstituted tobacco,and the tar content was the lowest when the ratio of stems to leaves was 2:1;(iii)There was a positive correlation between the coating rate and the tar content of paper-making reconstituted tobacco,the increase of coating rate would lead to the increase of tar content.(Ⅳ)The tar content of paper-making reconstituted tobacco prepared under a set of factors,including fiber proportion,beating degree,basis weight had fallen by more than 50%,and blending it in cigarette products had also reduced the tar content of cigarettes obviously.【Conclusion】The tar content of reconstituted tobacco could be re-duced by adjusting the process parameters.While the PRT sample integrated with some tar-reduced factors was blended into cigarettes,it could greatly reduce the tar content of cigarettes.Therefore,some technical methods could be taken properly to reduce the tar content of PRT,and achieve‘reducing the harmful and tar content’after blending it into cigarettes.