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选取苏北地区不同品质的杨木加工剩余物为原料,采用一种我国自主研发出来的新型预浸磨浆系统以及常规的高浓盘磨对比研究不同品质杨木加工剩余物对化学机械法制浆性能的影响。研究结果表明:杨木加工剩余物的质量对制取化机浆的制浆得率、磨浆能耗、纸浆白度及纸浆的强度性能均有不同程度的影响。在相同H2O2用量为7.0%,NaOH用量6.0%条件下,以品质较好的杨木加工剩余物为原料,采用双螺杆新型预浸磨浆系统制得化机浆的得率可达85.6%左右,纸浆白度值81%ISO以上,在游离度为300mlCSF条件下,抗张强度可达到33N.m/g以上;以品质较差的杨木加工剩余物为原料,制浆得率为84.2%,纸浆白度为73%左右,抗张强度为29N.m/g。另外,采用双螺杆新型预浸磨浆系统比采用高浓盘磨制浆磨浆电耗上可节省30%左右,制浆得率、纸浆白度及纸浆的强度性能差异不大。
Select the different quality poplar wood processing residues in northern Jiangsu as raw materials, using a new type of prepreg refining system independently developed in China and the conventional high-concentration disc grinding comparative study of different quality Poplar wood processing residues on the chemical mechanical system Effect of pulp properties. The results showed that the quality of poplar wood processing residue had different effects on the pulping yield, refining energy consumption, whiteness of pulp and pulp strength. Under the condition of the same dosage of H2O2 7.0% and NaOH 6.0%, the better processing quality of poplar wood was used as raw material, and the yield of machine pulp was about 85.6% with the new twin-screw prepreg refining system , Pulp whiteness value of 81% ISO or more, in the freeness of 300mlCSF conditions, the tensile strength can reach 33N.m / g or more; poor quality poplar processing residue as raw material, the yield was 84.2% , Whiteness of pulp is about 73%, tensile strength of 29N.m / g. In addition, the use of new twin-screw prepreg refining system than the use of high concentration disc mill pulp refining power consumption can save about 30%, pulp yield, pulp brightness and pulp strength performance difference is not significant.