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造纸黑液资源化处理回收木糖粉 总被引:4,自引:0,他引:4
本文通过对造纸制浆黑液资源化处理回收木糖粉技术应用的实例分析,系统介绍了其技术工艺、设备特点,详细分析了它的环境效益和社会效益。本技术对中小型制浆造纸企业治理黑液提供了有益的借鉴。 相似文献
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通过工业性运行试验,验证“蔗渣碱法造纸制浆黑液资源化处理”项目工艺路线在工业过程中的可行性,工艺设备的可靠性,纸产品以及黑液处理回收产品的产量,质量及其工艺的稳定性;得出资源化回收产品产率,质量等工业实验数据,为项目产业化实施提供设计依据。 相似文献
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造纸废水生化降解工艺的应用与探讨 总被引:1,自引:0,他引:1
结合工程实例 ,讨论了生化法对麦草碱法造浆黑液及造纸综合废水处理的可行性。探讨结果表明 ,只要控制适当的理化条件、驯化优势菌种 ,微生物方法对造纸综合废水及黑液CODCr的降解具有显著的作用 ,做到达标排放是完全可能的。 相似文献
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碱回收工艺是造纸行业综合治理造纸黑液的一种行之有效的办法。用一吨石灰就能从造纸黑液中回收一吨烧碱,经济效益十分显著。但随之而带来的问题是每回收一吨造纸黑液约要产生一吨白泥废渣。白泥呈灰白色浆状,pH 值11~14,主要化学成份见表1,其中碳酸钙约占95%。 相似文献
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运用模糊层次分析法优选制浆造纸废水深度处理方案 总被引:1,自引:0,他引:1
制浆造纸废水最适深度处理方案的选择是一个多准则决策问题,本文通过建立评价指标体系,从经济费用、技术性能、管理效果和社会效益4个方面,对混凝沉淀(气浮)+过滤、Fenton氧化和生态法3种深度处理方案进行分析;采用层次分析法确定指标体系权重,其中技术性能(0.5333)权重最高;结合模糊数学法开展综合评判,评估各方案的优缺点,最后通过方案总排序确定工程优选方案。同时,针对2个具有代表意义的制浆造纸企业废水深度处理工程案例,在方案隶属度的确定时增加了决策者的期望值和企业的实际情况,分别选取了最适的制浆造纸废水深度处理方案:混凝沉淀(气浮)+过滤法(A企业)和生态法(B企业),这样可以更客观地指导决策者选取最合适的制浆造纸废水深度处理方案。 相似文献
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酸化法提取木素在造纸黑液治理中的应用探析 总被引:9,自引:0,他引:9
提出了采用酸化法从造纸黑液中提取木素的最佳工艺条件,并结合生产实际进行了分析。黑液经酸化后,能大除大量有机物,对减轻黑液污染具有明显的效果,同时回收木素创造了较好的经济效益,实践证明,酸化法提取木素是中小型造氏厂草浆黑液治理的一条可行途径。 相似文献
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C. I. Harding Ph.D. E. R. Hendrickson Ph.D. 《Journal of the Air & Waste Management Association (1995)》2013,63(12):491-499
The principal deterrent of general acceptance of weak black liquor oxidation by mills pulping southern pine is the extensive foam produced during the oxidation of the liquor. The foam results from relatively high concentrations of fatty and rosin acid soaps remaining in the black liquor after roughly 75% of these compounds have been removed by skimming as marketable by-products. The foaming propensity of black liquor can be used to advantage to provide additional by-product recovery while the black liquor is being oxidized. This paper will report the results of foam fractionation studies on such black liquors conducted in this laboratory. 相似文献
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E. R. Hendrickson Ph.D. C. I. Harding Ph.D. 《Journal of the Air & Waste Management Association (1995)》2013,63(12):487-490
This paper will discuss the sources of odorous air pollutants from sulfate pulping operations. One of the major sources is the recovery furnace. Odors from this source can be reduced considerably by oxidation of the black liquor prior to evaporation and burning. The procedure has been used with considerable success in the northwestern and northeastern parts of the United States. Unfortunately, the majority of sulfate pulp production occurs in areas where southern pine is the basic raw material. For several reasons the black liquor resulting from southern pine operations presents problems when the usual oxidation procedures are used. Although not as effective as normal black liquor oxidation strong black liquor can be oxidized without too much difficulty. Various procedures for oxidation of black liquor will be discussed. Results of stack sampling in U. S. pulp mills with and without the oxidation unit in operation will be reported. 相似文献
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酸析-活性炭纤维吸附预处理精制棉黑液 总被引:2,自引:0,他引:2
采用酸析-活性炭纤维吸附工艺去除精制棉黑液中的有机物,先用酸析法去除木质素,再用活性炭纤维吸附黑液中的剩余有机物。采用紫外-可见(UV-vis)吸收光谱、傅立叶转换红外吸收光谱(FTIR)和明亮发光菌水质急性毒性法等手段分析处理前后的精制棉黑液。研究表明,黑液中主要有机成分为愈创基(G-)和羟苯基(H-)木质素。在pH为2.0,活性炭纤维用量为90 g/L,温度为40°C,吸附时间为5 h的条件下,COD去除率可以达到85%。活性炭纤维对酸析后精制棉黑液的吸附热力学符合Redlich-Peterson经验吸附模型,吸附动力学符合伪二级动力学模型,吸附为吸热过程。酸析-吸附过程使精制棉黑液急性毒性去除率达到95%以上,为后续生物法处理提供了有利条件。 相似文献
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电渗析法处理造纸黑液回收碱的试验研究 总被引:32,自引:0,他引:32
进行了单阳膜电渗析法从造纸黑液中回收碱液试验,结果表明该法回收吨碱的电渗析电单耗可稳定在3000kWh左右,比氯碱厂生产烧碱和黑液燃烧法回收碱的能耗都低。当回收终点pH为7时,Na^2+回收率为50%,阳极黑液含Na^+为5000 ̄7000mg/L,可直接回用于生产工段。而本试验所采用的钛涂镣电极使用耐久性欠佳,尚有待改进。但该法仍不失为处理造纸黑液的可选方案。 相似文献
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Evaluation of Kraft Process Pollution Abatement Strategies by Time Series Analysis of Makeup Records
A historical record of monthly chemical makeups for a North American pulp mill has been analyzed by time series methods. The analysis yields estimates for the reduction in sulfur makeup resulting from each of three separate pollution abatement moves: black liquor oxidation, blow heat recovery, and cooking liquor sulfidity reduction. Further analysis yields estimates of sulfurous emissions and of the substantially lower emissions which could have been achieved if sulfidity management had been incorporated in the program. 相似文献