共查询到18条相似文献,搜索用时 140 毫秒
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爆破制浆造纸黑液处理工艺研究 总被引:1,自引:1,他引:0
爆破制浆造纸黑液经三效蒸发装置浓缩后,固形物含量可达34%~40%,利用内旋式不锈钢喷枪送入锅炉炉膛内燃烧,可将爆破制浆造纸黑液全部处理不外排。同时,每立方米浓缩黑液可平均节约燃煤91.06 kg,具有较好的经济、环境效益。 相似文献
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麦草浆黑液的处理与回收 总被引:4,自引:0,他引:4
制浆造纸过程中产生的黑液是造纸的主要污染源,黑液对环境造成了很大的危害。本文简要介绍了国内目前麦草浆黑液的处理方法与回收应用的新技术及一些改进工艺。碱回收作为国内流行的一种黑液处理工艺在此也有所介绍。 相似文献
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蔗渣造纸工业的主要环境问题是如何消除化学制浆和半化学制浆过程中黑液造成的严重污染。在此情况下,用外部处理的传统方法不足以消除污染,必须同时采用黑液回收系统。由于Tomlinson回收蒸煮锅所具有的优点,在大型工厂碱法制浆的黑液回收系统中应用十分普遍。虽然这个系统能大大减轻污染,但它的成本较高,难以在每日产量小于100吨的纸浆厂中应用。因此,其他的碱回 相似文献
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生物—物理化学法处理制浆黑液的试验研究 总被引:4,自引:0,他引:4
采用酸中和—厌氧—好氧—生物活性炭或化学混凝综合法处理制浆黑液,探讨了酸中和处理的影响因素及厌氧处理对后段好氧处理的影响.结果表明:两种综合处理工艺对黑液中木质素及COD_(Cr)的去除有显著效果;厌氧处理比好氧处理对木质素的降解更为有利. 相似文献
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Two different kinds of black liquor from the papermaking industry were treated by acidification and reuse. The experimental parameters and conditions were discussed in detail. The experimental results indicated that the treatment process mentioned in this article is an effective process for the treatment of black liquor from the papermaking industry. By the treatment, the solid materials in black liquor are transferred into two by-products and the other components are reused or evaporated. Thus, no wastewater except some condensation water would be discharged in pulping process and the problem of oollution of black liauor would be effectively solved. 相似文献
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《Journal of Cleaner Production》2008,16(12):1287-1293
Bagasse pulping trials were carried out with NH4OH–KOH in the presence of anthraquinone for the purpose of reducing or eliminating the black liquor problem in pulping processes. The operating conditions, such as the composition of the cooking liquor, the liquid to bagasse ratio, the maximum cooking temperature and the cooking time at the maximum temperature during the pulping process were investigated systematically to establish optimal pulping conditions. The experimental results indicated that this pulping process is particularly well suited for the pulping of bagasse, where the bagasse was delignified to a low Kappa number value of 11.3, the percentage delignification was 80%, and the pulp yield was 65%. This newly developed pulping process provided a high tensile index of 51.6 N.m/g. The laboratory-scale experimental results were replicated on a pilot-scale process successfully, demonstrating the initial stages of scale-up and also demonstrating a degree of repeatability. There is a good prospect that this process can utilize black liquor, which contains nitrogen, phosphorus, potassium and ammoniacal lignin, as a fertilizer for agricultural production. Hence the black liquor problem associated with the pulping industry can potentially be turned into a benefit through this environmentally friendly bagasse pulping process. 相似文献
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爆破浆经二级挤浆提取黑液,黑液经三效真空蒸发浓缩后,送锅炉内燃烧,每立方浓黑液可节煤91.06 kg。提取黑液后造纸综合废水COD质量浓度可控制在1 250~1 450 mg/L,经"加药沉淀+水解酸化+SBR"工艺处理,可使废水COD排放质量浓度稳定低于100 mg/L。 相似文献
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麦草低污染制浆新技术 总被引:3,自引:0,他引:3
麦草低污染制浆新工艺采用亚硫酸钠-甲醛-蒽醌(加入少量催化剂)制浆(SFP-AQ法),生产吨浆的COD排放总量下降30%,色度下降60%,悬浮物总量下降50%,制浆黑液的pH值下降至7~8。采用该新工艺同时还可产生表面活性好、便于利用的木素磺酸钠和其他产品,使纤维资源得到综合利用,为解决中小型草浆造纸厂的污染问题提供一条有效途径。j 相似文献
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Combined effect of US/PFS on the black liquor of making paper 总被引:1,自引:0,他引:1
The reed pulping black liquor is used as a sample. Researches of (1) combined effect of ultrasound(US)/polyferric sulphate(PFS)/hydrogen peroxide(H2O2); (2) effects of the horn tip areas; (3) effect of dose of PFS were carried. Extrapolation of these experiments indicated treatment results are possibly related to complex chemical compositions in the reed pulping black liquor. 相似文献
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本文利用多级水幕吸收塔,研究了循环液气比(L/G)、空塔气速、进口烟气SO2浓度以及进口烟气Hg浓度对麦草制浆黑液脱硫除汞效果的影响.实验结果表明:随着L/G增加、空塔气速增大、进口SO2浓度降低,脱硫除汞效果得到了不同程度的提升;随着进口Hg浓度升高,脱汞效率缓慢下降,脱硫效率基本不变.通过提高L/G、增加空塔气速、降低进口SO2浓度与Hg浓度提麦草制浆黑液高脱硫除汞效率,为麦草制浆黑液协同脱硫除汞奠定应用基础. 相似文献