Study on the chlorine-free short sequence bleaching process of kraft bagasse pulp [硫酸盐蔗渣浆全无氯短序漂白生产工艺的研究]

作者：Wang L.; Liu M.^*; Le F.; Li J.

来源：China Pulp and Paper, 2019, 38(7): 8-13.

DOI：10.11980/j.issn.0254-508X.2019.07.002

• High concentration ozone reactor
• Short sequence bleaching
• Sulfate bagasse pulp
• Total chlorine free

With the conditions closely imitating the practice production of the mill,the parameters of sulfate bagasse pulp acid pretreatmentozone- hydrogen peroxide(AZP) short sequence total chlorine free(TCF) bleaching process were studied. The experimental results showed that the optimum process conditions were:pulp consistency 36%,pH value 2. 0,ozone dosage 1. 2%,ozone concentration 120 g/m3,reaction time 30 min,at room temperature for Z-stage;for P-stage pulp consistency 10%,the peroxidation dosage 3%,reaction time 120 min,reaction temperature 90℃,NaOH dosage 0. 8%. The whiteness,viscosity and Kappa number of the bleached kraft bagasse pulp were 85. 6%,559 mL/g and 3. 57,respectively. At the same time,compared with the traditional bleaching processes(OQP1P2, OP1ZP2),the pollution load was the lowest when AZP short sequence bleaching was applied,CODCr value was 760 mg/L,BOD5 was 90 mg/ L,and chroma value was 680 C. U.

• 单位
  华南理工大学