共查询到17条相似文献，搜索用时 203 毫秒
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应用差热天平，对原黑液浓缩物和酸沉析木素进行差热分析和热重分析，得到差热曲线ＤＴＡ和热重曲线ＴＧ。解析结果表明：酸沉析木素比原黑液浓缩物热解温度低、速度快、灰分少，作为活性炭原料或高级燃料等的热解过程有明显的优越性，为草浆黑液合理利用于热化学加工，提供基础试验数据。 相似文献
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草浆厂制浆黑液全循环利用技术研究王正冯楠（中国林科院木材所北京１０００９１草浆厂制浆黑液是对我国环境污染最严重的废水之一。目前尚无有效的治理方法。蒸发燃烧碱回收技术对于草浆黑液治理存在一些难以解决的困难。主要有以下几点：１草浆黑液中含有大量从草类原... 相似文献
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《技术与市场》2001,(3):8
针对造纸工业面临的这一重大难题，作为河南省的重大科技攻关项目，河南省有关科研单位全力合作，经过多年的研究开发，终于在用生物工程治理草浆法造纸黑液方面取得重大突破，成功地培养出大批量的可使黑液碱性降低的产酸菌种和处理全化学草浆的特效产甲烷菌种，大大降低了造纸废水的处理成本。来自中国科学技术住处研究所的检索结果表明，这一工业化成果在国内外均无先例。它为我国碱法全化学草浆黑液的处理开创了新路，也为我国草浆造纸工业的可持续发展提供了有力的科技保证。 应用生物工程技术治理碱法草浆造纸黑液与常规的碱回收法相比，虽然运行成本基本持平，但一次性投资只约为碱回收法的９％，而且操作简便、运行稳定可靠；对造纸企业进行有效的废水处理有着重要的经济意义和社会意义。据了解，这一技术成果已经运用于工业化实践，实现了工业化试验基地造纸废水稳定达到本地排人城市污水厂的排放标准。 联系人：刘福民李雪 地址；郑州市城东路７７号１０６＄箱 邮编：４５０００４造纸黑液可望“漂白” 相似文献
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MAE技术处理草类纤维制浆黑液的研究 总被引：1，自引：0，他引：1
ＭＡＥ（ｍｅｍｂｒａｎｅ－ａｓｓｉｓｔｅｄ ｅｌｅｃｔｒｏｌｙｓｉｓ）技术是一种股分离技术，它是利用离子交换膜的选择性和直流电场使黑液中的离子产生定向移动的特性，仅需一个步骤就可以迁移出草浆黑液中的销离子并加以回收。本报告对影响草浆黑液中钠离子迁移的因素，如阳极材料，阳极区扰动，电压等进行了研究，并探讨了这些因素与回收率和电耗的关系。 相似文献
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在生产树脂过程中,用粉状活性炭脱色,排出吴胶冻含废粉状活性炭的渣子。其工业分析表明:干燥减重0.535％,灰份3.19％,挥发份72.6％,这里的挥发份为可燃烧的含炭有机物。在试验室条件下,对胶冻状废渣采用复合型赋活剂再生,使废炭恢复吸附能力,作为活性炭再度用于吸附工程。 相似文献
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为了再生废弃粉状活性炭,将废弃粉状活性炭、煤焦油和聚乙二醇混合搅拌,并经成型、炭化和活化制备成型颗粒活性炭。采用国家标准和氮气吸附法分析测试活性炭的碘吸附值、亚甲基蓝吸附值、焦糖脱色率、比表面积和比孔容积等,利用热重分析方法研究废弃粉状活性炭、煤焦油和聚乙二醇3种组分及其混合物的热解特征,考察聚乙二醇的用量、分子量以及活化的温度和时间对成型活性炭吸附能力与孔隙结构的影响。研究结果表明:采用粉状活性炭、煤焦油和聚乙二醇混合成型的热再生方法可以制备出糖液脱色用颗粒活性炭;聚乙二醇添加剂可以显著提高活性炭的亚甲基蓝吸附值和焦糖脱色率,促进中孔的形成,但聚乙二醇分子量的影响不明显;在废弃粉状活性炭与聚乙二醇4000的质量比为6∶1,粉状活性炭与煤焦油的质量比1∶1.6,活化温度和时间分别为900℃和2 h等条件下,可以制备出亚甲基蓝吸附值达205 m L/g和焦糖脱色率达到110%的糖液脱色用成型颗粒活性炭。 相似文献
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用高效混凝过滤法处理草类制浆黑液，混凝净化后的黑液与中段废水及部分白水一起采用活性污泥法处理，经过处理后的废水可达到国家造板废水排放标准。 相似文献
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提出了非木材木质纤维生物质碱性亚硫酸盐制浆(ASP)生物炼制的理念,研究了总用碱量、亚硫酸化度、温度和时间对麦草碱性亚硫酸盐法蒸煮深度脱木质素特性和木质素磺化的影响。结果表明:麦草ASP法具有高的深度脱木质素选择性;深度脱木质素延伸与木质素磺化度提高具有一致性;总用碱量、亚硫酸化度、最高温度和保温时间对深度脱木质素选择性和木质素磺化度都有重要的影响;在总碱用量18.0%,亚硫酸化度85.0%,液比值3.5,最高温度168℃,保温150 min的条件下,可制得卡伯值8.8,得率56.8%,黏度为33.3 mPa.s的优良纸浆,此时黑液中磺化木质素磺酸基含量达2.16 mmol/g(以固形物计)。从深度脱木质素选择性、木质素磺化和纸浆基本特性考虑,麦草ASP法具有制浆生物炼制的前景。 相似文献
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Wei Wang Yasuyuki Matsushita Dan Aoki Kazuhiko Fukushima Rie Tomioka Kazuya Iizuka Chisato Takenaka 《Journal of Wood Science》2017,63(4):388-395
To investigate the possibility of decontaminating 137Cs-contaminated Cryptomeria japonica wood, kraft pulping was conducted and the Cs behavior in the reaction process was examined. 133Cs-treated or 137Cs-contaminated bark, sapwood, and heartwood chips of Cryptomeria japonica were digested using an aqueous solution of NaOH and Na2S. The pulp was washed with ultrapure water and filtered, after which the filtrate (black liquor) was collected. The black liquor was acidified to separate the supernatant and precipitation. The Cs (133Cs and 137Cs) concentrations in the chip and reaction products were measured. As for wood samples, the majority of Cs was present in black liquor, while only a minor amount of Cs was retained in the pulp (<1%). In the case of bark, although the majority of Cs was present in the black liquor, the proportion of Cs in the pulp was much higher than that in the wood pulp. In addition, the Cs in the precipitation of the bark was higher than that in the wood, possibly because the Cs in the bark was combined with some components, which is insoluble in alkaline solution. Our results suggest that 137Cs-contaminated Cryptomeria japonica wood can be used in the pulp and paper industries. 相似文献
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V. Masura 《Wood Science and Technology》1999,33(5):381-389
Summary A new mathematical model for checking and controlling the kraft pulping process has been derived. The model is based on the
modified relationship between the lignin content and the alkali concentration of a cooking liquor expressed as the ratio of
lignin/active alkali vs. concentration of the active alkali in a cooking liquor. The derived model characterizes the variation
of the lignin content of the partially delignified wood or pulp with the concentration of the residual alkali in a cooking
liquor during an entire pulping cycle, i.e. during the initial, transition, bulk and residual phases of the kraft delignification.
The relationship between the lignin content of the partially delignified wood ships or pulp and the concentration of the residual
alkali in a cooking liquor is expressed by the logarithmic straight line equation or its power form. The slope and intercept
constants of the derived equation for the individual phase of delignification have different values.
Received 5 June 1996 相似文献