打浆酶在漂白针叶木浆中节能、增强的应用研究

Reducing Energy and Increasing Strength Research of Refining Enzyme Application in Needles of Bleached Kraft Pulp

针叶木浆纤维长度较长,在造纸磨浆过程中所需能耗较阔叶木浆大,应用打浆酶对针叶木浆进行处理后,能够节降磨浆能耗,同时通过适当的磨浆游离度调整,对纤维强度有一定的增强作用。实验表明:针叶木浆的最佳强度的游离度为350-400mL;对比未经酶处理的针叶木浆及酶处理的针叶木浆分别在游离度400mL和370mL的条件下,相同的游离度情况下,经酶处理的针叶木浆打浆能耗略降,同时纤维质量分析仪(FQA)检测表明,纤维长度、细小纤维含量、纤维宽度及扭结指数与未经酶处理的针叶木浆基本相当;针叶木浆在400mL游离度的条件下采用酶处理后,其纤维强度除耐折度外均达到最佳,优于空白浆料。

During refining process,NBKP needs more energy than LBKP because the fiber lengthof NBKP is longer than LBKP fiber.Using refining enzyme to pre-treat NBKP can save refining energy,and the fiber strength can increase when do some proper adjustmentto the fiber freeness.The experiments showed un-treated NBKP had the best strength when pulp freeness was between 350mL and 400mL.Compareduntreated pulp and enzyme treated pulp at the freeness of 400mL and 370mL,we found that the energy consumption of the enzyme treatment was slightly decreased under the same freeness.FQA test showed that the fiber length,fines content,fiber width and kink index were almost equal,and the enzyme treated pulp had the best strength at 400mL freeness except folding endurance.