浓缩杏浆的工业化生产技术及设备

介绍了浓缩杏浆的生产工艺、技术参数、工业化生产设备选择要点,并制定了产品质量标准。     

Two step sequential treatment of pulp and paper mill effluent by Cryptococcus albidus and Emericella nidulans var. nidulans in 2L bioreactor

A number of studies had shown biological treatment of pulp and paper mill effluent. However, almost all the studies have focused on reduction in physical and chemical parameters. Toxicity analysis, though very important, has been neglected. Thus in this study genotoxicity along with colour and lignin content were studied. Treatment of effluent, generated at the pulping stage in pulp and a paper mill, was done using two fungal strains, Cryptococcus albidus and Emericella nidulans var. nidulans, in sequential manner in 2 L bioreactor. Two different treatments were given. In treatment (I) effluent was first treated by C. albidus (stage A) and this treated effluent was further treated by E. nidulans var. nidulans (stage B). In treatment (II) effluent was first treated by E. nidulans var. nidulans (stage C) and this treated effluent was further treated by C. albidus (stage D). Treatment (I) was more efficient than treatment (II) with 71%, 51%, 44% and 70% reduction in colour, lignin, COD and genotoxicity, respectively. Class distribution of comets also showed that treatment (I) was more efficient than treatment (II). Colour content showed very good correlation (r² = 0.99) with effluent toxicity. The effluent treatment process (I) can be scaled up for industrial use. © 2011 Canadian Society for Chemical Engineering     

德兴铜矿铜硫分离新工艺小型试验研究

探讨了各项工艺因素对铜硫分离新工艺的影响,结果表明,采用新型抑制剂Ｋ２０２,可以在近中性介质中实现铜硫分离,铜尾可直接原浆选矿。     

Control structure selection and model predictive control of the Weyerhaeuser digester problem

The Weyerhaeuser digester problem (WDP) is a simplified digester model which captures the major dynamic characteristics of a continuous pulp digester and has been offered to the research community as an industrial challenge problem. The control objective is to minimize variations in the Kappa # for unmeasured disturbances. A systematic approach to selecting the manipulated inputs and secondary measurements using robust control analysis tools has been successfully applied to the WDP. A multi-rate data-sampling linear model predictive controller using the selected input/measurement pairings provided robust closed-loop performance for the rejection of both deterministic and stochastic unmeasured disturbances.     

PVAF对改善麦草浆性能的研究

本文发现麦草浆组成的纸料存在的纤维短,保水值高,抄成纸张撕裂度低等问题,可以通过往纸浆中加入聚乙烯醇纤维(PVAF)来解决。加入 PVAF 改变了纸料中纤维长度分布,降低了纸料保水值,提高了纸料脱水能力,并使纸张的撕裂度、耐折度、耐破度和抗张强度明显上升。它改善麦草浆性能的效力大约是木浆的三倍,而价格仅是木浆的140%,因此使用 PVAF 不但能缓解木浆的紧缺,而且能降低生产成本。     

无捕收剂电化学浮选技术研究

仅通过添加少量电化学调整剂实现了硫化共生矿石的无捕收剂电化学浮选。在适当的矿浆电势Eh和pH值下,黄铜矿和黄铁矿表面适度氧化,可生成疏水性物质S0,导致浮选,大大降低药剂消耗,改善了后续分离浮选。对电化学调整剂的作用机理的研究考察说明,在低浓度下其性质稳定,应用可行。     

草浆造纸废水处理的工艺研究

应用浸没燃烧浮选木质素、絮凝除硅、软填料和灰渣过滤工艺过程对草浆造纸废水进行处理研究,确定了最佳工艺条件为：浮选木质素的ｐＨ值为３、絮凝沉降的ｐＨ值为９～１０。各项指标均达到国家规定的排放标准。估算吨水成本为０．６５元,技术经济可行。     

竹毛混纺织物成分比与热湿舒适性关系

选用6种不同成分比的竹浆/丝光羊毛混纺织物,毛/竹比例为30/70、40/60、50/50、54/46、60/40、70/30。对其进行成分比与热湿舒适性关系探究,最终得到织物最优成分比。分别对织物进行了透气性、透湿性和热阻测试,结果表明:丝光羊毛含量越多,织物的透气性越差,透湿性和导热性呈增加趋势。通过综合评估得出,当丝光羊毛含量在45%~50%时,该混纺织物具有最优的热湿舒适性。     

间歇硫酸盐法蒸煮过程纸浆卡伯值的近红外光谱法在线测量的研究

研究发现，硫酸盐法蒸煮液在800-900nm近红光谱波段间的吸收主要来自其中的碱木素，而其中的D-葡萄糖、D-甘露糖、D-木糖、D-半乳糖和糖醛酸等碳水化合物的降解产物及二氯甲烷和苯醇抽出物在此波段基本上没有吸收。并在这段波段建立起的纸浆卡伯值近红外光谱测量模型。该模型显示蒸煮液的吸光度与纸浆卡伯值具有较好的线性关系（相关系数R^2为0．996），并有较高的预测精度。因此，建议采用近红外光谱法实现硫酸盐法蒸煮过程纸浆卡伯值的在线测量，并有望开发出蒸煮过程纸浆卡伯值近红外光谱法在线测量仪，真正实现蒸煮过程的纸浆卡伯值的闭环反馈控制。