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| Application of Medium-consistency Pressure Screen in Reconsitituted Tobacco Production |
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| DOI：10.11980/j.issn.0254-508X.2018.11.013 |
| Key Words:medium-consistency pressure screen reconsitituted tobacco evenness of the pulp fiber operational stability |
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| Abstract:The necessity of the application of medium-consistency pressure screen in reconsitituted tobacco papermaking process was introduced. The debugging and trial operation of medium-consistency pressure screen in the process of making reconsitituted tobacco were summarized， it revealed that the concentration of the pulp entering into the pressure screen， the pressure difference of the entering pulp and the accepted pulp of the pressure screen， the flow rate of the tailings， the consistencies of the accepted pulp and the tailings played an important role in steady operation of the pressure screen. The pulp after beating under the same condition was received， the proportion of too long or too short fiber in the received pulp was reduced， the fiber length distribution was improved significantly. The percentage of the fiber retained in 20 mesh and in between 80～300 mesh decreased by 19.0%， 50.6%， respectively. The percentage of the fiber in between 20～50 mesh and in between 50～80 mesh increased 42.5%， 10.2%， respectively， beating degree of the pulp increased 33.8%， wet weight of the pulp decreased 19.8% after receiving， the variation of the basis weight， thickness， coated rate of the reconsitituted tobacco was no more than ±1.5%， tensile strength of reconsitituted tobacco increased 19.4% which was of benefit to reduce paper break times， increasing operational stability of the paper machine and the production efficiency． |
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