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Sodium Hydroxide Dosage Optimization for Chemi-mechanical Pulp Bleaching Process |
Received:October 28, 2023 |
DOI:10.11980/j.issn.0254-508X.2024.04.022 |
Key Words:chemi-mechanical pulp bleaching pulp qualities dosage optimization of sodium hydroxide |
Fund Project:山东省重点研发计划资助(2022SFGC0101);泰山产业领军人才工程资助。 |
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Abstract:The optimum dosage of sodium hydroxide in bleaching section of poplar chemi-mechanical pulp was studied. When the mass ratio of hydrogen peroxide and sodium hydroxide was 1∶1, the whiteness of pulp was the highest. To improve the strength index of chemi-mechanical pulp, the dosage of sodium hydroxide should be appropriately increased. To improve the bulk and opacity, the dosage of sodium hydroxide should be reduced, in order to prevent the chemi-mechanical pulp from yellowing after a period of time in the pulp storage tower, the residual hydrogen peroxide in the chemi-mechanical pulp should be more than 10% total usage of the hydrogen peroxide in the bleaching section. According to the test results, the bleaching process of chemi-mechanical pulp production line was adjusted and optimized, and the pulp quality reached the expected effect. |
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