| 孟祥岩,杨泽广,郭彩虹,刘天勇,杜彦护,张庆伟.硫酸盐法制浆漂前洗涤效率的改进实践[J].中国造纸,2026,45(6):165-169 |
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| 硫酸盐法制浆漂前洗涤效率的改进实践 |
| Improvement Practice of Pre-bleaching Washing Efficiency in Sulfate Pulping |
| 收稿日期：2025-12-03 修订日期：2025-12-31 |
| DOI：10.11980/j.issn.0254-508X.2026.06.018 |
| 关键词: 硫酸盐制浆 洗涤效率 COD 碱损 |
| Key Words:sulfate pulping washing efficiency COD alkali loss |
| 基金项目: |
| 作者 | 单位 | 邮编 | | 孟祥岩* | 海南金海浆纸业有限公司,海南洋浦,578101 | 578101 | | 杨泽广* | 海南金海浆纸业有限公司,海南洋浦,578101 | 578101 | | 郭彩虹 | 海南金海浆纸业有限公司,海南洋浦,578101 | 578101 | | 刘天勇 | 海南金海浆纸业有限公司,海南洋浦,578101 | 578101 | | 杜彦护 | 海南金海浆纸业有限公司,海南洋浦,578101 | 578101 | | 张庆伟 | 海南金海浆纸业有限公司,海南洋浦,578101 | 578101 |
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| 摘要:针对硫酸盐浆生产线浆料COD偏高、碱损偏大的生产难题，本课题系统分析产能扩容、生产用水受限、原料结构波动等多重不利因素的影响机制，针对性制定并实施综合性工艺优化改进方案。通过对双辊洗浆机加装挡水板，有效提升洗浆出料浓度；淘汰原有氧漂段洗浆设备，更换为高效鼓式置换洗浆机，大幅改善浆料洗涤效率与洁净度；优化氧漂段后端气体冷凝系统，解决高温气雾工况下洗涤效果不佳的问题。同时，回收利用蒸发系统冷凝水作为生产洗涤用水，并搭建木片圆形料堆，稳定生产原料结构。工艺优化改造后，生产线出浆浓度提升约5%，浆料碱损降低4.25 kg/adt。生产实践结果表明，上述综合改进措施可有效降低进入D0漂白工段浆料的COD，减少漂白化学品与芒硝的补充用量，显著降低生产成本。 |
| Abstract:To address the production challenges of high COD and significant alkali loss in the pulp of the sulfate pulp production line， this paper systematically analyzed the mechanisms underlying multiple adverse factors， including capacity expansion， water supply constraints， and fluctuations in raw material composition， tailor-made and implemented comprehensive process optimization and improvement measures. By installing baffles on the twin-roll pulp washer， the discharge concentration of the washed pulp was effectively increased. Replacing the existing pulp washing equipment in the oxygen bleaching section with a high-efficiency drum displacement pulp washer had significantly improved pulp washing efficiency and cleanliness. Optimizing the gas condensation system at the rear end of the oxygen bleaching section had resolved the issue of poor washing performance under high-temperature mist conditions. Additionally， the condensate water from the evaporation system was recycled for use as process wash water， and circular wood chip piles were established to stabilize the raw material composition. After the process optimization and upgrading， the pulp concentration at the production line increased by approximately 5%， and the alkali loss in the pulp decreased by 4.25 kg/adt. The production results indicated that the aforementioned comprehensive improvement measures could effectively reduce the COD of the pulp entering the D0 bleaching stage， decrease the amount of bleaching chemicals and sodium sulfate required， and significantly lower production costs. |
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