造纸法再造烟叶原料在线混配及清洁上料系统的设计

Design of on-line raw material blending and clean feeding system for reconstituted tobacco making

为解决造纸法再造烟叶原料理化指标波动大、含杂量高、计量精度低和工作环境差等问题,根据再造烟叶原料特性,设计了造纸法再造烟叶原料在线混配及清洁上料系统。该系统采用圆筒初清筛和金属探测仪对原料进行除杂,利用打梗机对长度大于3 cm的烟梗进行预处理,提高原料的均匀性;通过固体物料混合罐进行均匀混配,保证原料化学成分的稳定性以及批次间的一致性;选用密闭和气力相结合的方式输送物料,改善工作环境。将配方柜混配与在线混配的配方原料进行对比分析,结果表明:(1)采用在线混配方式,批次间烟梗物理尺寸波动值由17.21%降低到2.99%,烟梗总糖波动值由8.85%降低到2.08%,烟末总糖波动值由18.21%降低到2.60%;(2)原料计量误差由5.75%降低到0.85%,杂物有效去除率达到98.5%。该系统为提高造纸法再造烟叶加工过程的稳定性和计量精确性提供了技术支持。

In order to reduce the physicochemical index fluctuation of and foreign matter content in raw material of paper-making reconstituted tobacco,promote metering precision and improve working environment,an on-line blending and clean feeding system was designed.The system comprises a cylindrical sieve and a metal detector for removing foreign matters,a stem thresher for pretreating the stems longer than 3 cm,a raw material blending tank,and a pneumatic tube conveyor.The material blended by the new blending system was compared with that blended by a blending silo,the results showed that： 1） The on-line blending system reduced the fluctuations of stem size,total sugar in stem and total sugar in tobacco dust between batches from 17.21%to 2.99%,from 8.85% to 2.08%,and from 18.21% to 2.60%,respectively.2） The metering error of material decreased from 5.75% to 0.85%,the effective rejection rate of foreign matters reached 98.5%.The designed system provides technical supports for promoting the process stability and metering precision in reconstituted tobacco making.