蒸球球内温度分布及测量的研究

对蒸球球内温度分布进行了详细的分析，提出采用中通管测量球内温度并通过计算机对测量值进行校正的方法，实践说明了该方法效果良好，为采用Ｈ－因子数学模型控制蒸煮过程提供了更合理的手段。     

人工种植桉木深度脱木素的研究

进行了４种人工种植桉木改良硫酸盐法制浆的实验。结果表明,改良硫酸盐法制浆的选择性明显高于常规硫酸盐蒸者法,改良硫酸直帽浆可以生产出卡伯值非常低且强度很好的纸浆。与常规硫酸盐蒸煮相比,改良硫酸盐煮桉木浆的伯值低５－６个单位,而纸浆粘度却高出２．８ｍＰａ．ｓ。     

稻麦草氨法制浆工艺研究

研究了在氨水中添加少量钾碱作为蒸煮剂的稳麦草制浆新工艺，讨论了蒸煮剂的用量和配比，液固比，蒸煮最高温度，升温时间和保温时间对蒸煮效果的影响，继而确定了适宜的工艺条件，结果表明，该蒸煮体系对稻，麦草木素的脱除率达到85%。纸浆得率为稻草38.12%(细浆得率）和麦草49.65%(粗浆得率）。通过红外光谱（IR）测定了稻草蒸煮过程中木质素的结构变化。     

硫酸盐法竹浆蒸煮终点控制的研究

本文对竹子硫酸盐法制浆过程中主要工艺参数进行了试验研究,找出了它们之间的关系,并建立了预报蒸煮终点纸浆硬度的经验公式,为电子计算机控制蒸煮过程提供了可靠依据.     

蒸球盖板弹性应力及位移分析

应用有限元法对ＺＪＱＺ型蒸球复杂壳体盖板进行了弹性计算，得到蒸球盖板的弹性应力及位移分布，为蒸球盖板的设计和安全工作提供了依据。     

蒸球盖板弹性应力及位移分析

应用有限元法对ＺＪＱ２型蒸球复杂壳体盖板进行了弹性计算，得到蒸球盖板的弹性应力及位移分布，为蒸球盖板的设计和安全工作提供了依据。     

“造纸蒸煮工艺微机控制装置”已取得显著经济效益

山东省自动化研究所研制的“造纸蒸煮工艺微机控制装置”一九八八年底在济南通过了省科学院组织的技术鉴定。该装置于一九八七年十一月研制成功,投入工厂使用,到目前为止,已在省内推广了五家,为企业带来显著的经济效益。该装置主要用于造纸蒸煮过程的监测控制,一台装置可控制四个蒸球。该装置将调节、显示、记录曲线、报警等多种功能集于一身。设计合理,结构简单,抗干扰能力强,     

速生针叶木改良硫酸盐法制浆及其原理

对我国引种的南方湿地松和加勒比松进行了实验室改良硫酸盐法蒸煮的研究。结果表明,改良硫酸盐法制浆的选择性明显高于常规蒸煮法,当卡伯值相同时,与常规硫酸盐浆相比,改良硫酸盐浆具有相近的细浆得率、较低的粗渣率和较高的粘度,在相同的抗张指数下有更高的撕裂强度。     

意大利杨木制浆造纸性能的研究——碱性亚硫酸钠-蒽醌法

一、前言 碱性亚硫酸钠制浆方法使用氢氧化钠和亚硫酸钠为蒸煮液。其优点是:纸浆得率高,易漂白,纸浆的强度性能与硫酸盐浆相接近,并且不会产生硫酸盐蒸煮及回收系统所散发的恶臭硫化物,等等。因此,近年来国内外采用碱性亚硫酸钠制浆方法,对针阔叶木、芦竹、麦草等进行了一些试验研究。 碱性亚硫酸钠法蒸煮温度一般要比硫酸盐法高10—15℃,化学品用量也要高20％(或者蒸煮时间延长5倍)。最近发现,蒽醌在碱性亚硫酸钠法蒸煮中具有加速脱木素催化作用,因此,上述缺点可以通过添加蒽醌来弥补。 本试验以意大利杨木为原料,研究了碱性亚硫酸钠一蒽醌法制浆条件及其对浆质量和得率的影响规律。     

最新科技成果专利技术转让项目(第11辑)

098 低成本无污染麦秸稻草造纸制浆新技术 该技术打破了原蒸球制浆工艺及配方,不用蒽醒,不用蒸球,改用地池,低温蒸煮,不加搅拌,并采用新型制浆助剂,减少用碱量8％,降低制浆成本30％,而且达到治污目的。产生的黑液深度低、色泽浅,可循环利用。根据产量大小,建几个水泥池就能解决根本问题,经处理后的水清晰、无任何污染,各项指标均低于国家标准。经环保部门多次取样化验,其《水质、固体样品监测结果报告》如下:COD 432mg/c; pH值6.86;悬浮物27.3mg/L(重量法)。经粉碎后的纸浆经漂白软     

间歇蒸煮过程优化控制在福建青山纸业的应用

介绍了一套应用于纸厂蒸煮车间的间歇蒸煮过程计算机优化控制系统,该系统能自动完成蒸煮各阶段的操作,也可用来指导操作工进行操作.除了实现对蒸煮过程的常规温度和压力控制以外,还针对立式蒸锅建立了Kappa的软测量模型,实现蒸煮终点的精确预报.该系统在福建青州造纸厂蒸煮车间的投运后运行稳定,Kappa值的均方差减小约20%,单锅产量提高约1%,蒸汽压力波动减少91%,化学品用量减少8%,增加产量14.1%,取得了良好的经济效益.     

IMPACT OF COOKING HOMOGENEITY ON PULP STRENGTH PROPERTIES

Cooking homogeneity of kraft pulping can have significant impact on pulp strength properties. We have studied cooking homogeneity of two kraft digesters within Stora Enso. One of the digesters is a one-vessel hydraulic continuous digester (digester A)and the other one is a two-vessel vapor/liquor phase continuous digester (digester B). They are located in the same mill and use the same softwood chip quality. Due to the differences in chip pre-steaming and cooking facilities and conditions, significant differences in pulp strength properties, reject contents and kappa variations have been found between the pulps produced in the two digesters. Digester A has a modem chip bin with efficient pre-heating and air removal, whereas digester B has poor chip pre-steaming conditions. Our strength delivery studies show that although the two digesters produce pulps with the same kappa number and viscosity, the pulp produced in digester A has about 20% higher strength delivery, l%-unit (based on wood) lower reject content and lower kappa variations based on FTIR spectra analysis on pulp sheet than the pulp produced in digester B.Results of the studies indicate that more homogeneous cooking, i.e., lower lignin/kappa variation in the fibers, leads to improved pulp strength properties. Efficient chip pre-steaming is important/essential for achieving homogeneous cooking. Rebuilding the equipment for improving chip pre-steaming conditions of digester B is to be carried out.     

LIGNIN ADSORPTION AND KAPPA NUMBER IN ETHANOL PULPING

INTRODUCTIONIt was reported that organic-solvent pulping process emerged in 1893,and then kleirert, proved that the lignin delignfied in the cooking was soluble in the ethanol water (EW) more than in the ethanol only, obtained a correlative patent in 1932.Diebold who worked in Paper association of Canada prompted the process, and pronounced a patent in the 1978[1-2]. In addition, non-wood fiber material occupies a much higher proportion to the material used in papermaking of china, so lo…     

CHARACTERISTICS OF LIGNIN REACTIONS IN SODA COOKING OF WHEAT STRAW PART 1 REACTION OF UNCONDENSED LIGNIN

INTRODUCTIONWheatstrawisanimportantfiberrawmaterialinmanycountries熏particularlyinAsia熏EasternEurope熏andLatinAmerica熏whereareshortofwoodsuppliessuitableforthepurpose.Ithasbeenreportedthatnon-woodplantfiberswillplayanincreasingroleintheglobalpulpandpaperindustry熏andtheworldstrawproductionwasapproximately10熏000milliontonsin1998眼1演.ThelargestcapacityforproducingpulpfromthestrawisconcentratedinChina.IntheEuropeanCommunitythereisalsoagrowinginterestinthedevelopmentofnon-foodapplicati…     

脱木素反应的多变量推断控制系统研究

根据脱木素反应动力学理论，建立了脱木素反应的双输入双输出数学模型，设计了用有效碱浓度和卡伯值作为控制变量的多变量推断控制系统。对实际连续蒸煮过程脱木素反应控制的测试结果表明，该控制系统可以很好的克服各种不可测扰动对脱木素反应的影响，提高脱木素反应生成纸浆的质量和纸浆得率，同时降低反应生成副产品蒸煮黑液中的残碱浓度，减少蒸煮过程的用碱量，达到保护环境、清洁生产的目的。     

焊缝缺陷对蒸球使用寿命影响的试验分析

针对木浆蒸球的料孔圈上含有未焊缝缺陷的情况，设计模拟疲劳试验。通过对模拟４种状况的试样所测得的数据，对蒸球使用寿命进行了定量分析。测试结果表明：在标定内压下工作，焊缝缺陷对蒸球使用寿命的影响较小，而在经常性的超荷下运行会使该结构的使用寿命显著减少。     

过醋酸蒸煮脱除棉浆荧光的工艺研究

通过正交及单因素实验，初步探讨了过醋酸在棉浆蒸煮过程中脱除荧光的效果，并分析了原料预处理对制浆工艺的影响。优化工艺制得棉浆得率迭91％，ISO白度达87．76％，棉浆中荧光的脱除率达90％以上。     

ON THE BLACK LIQUOR AND RECYCLE COOKING OF AS-AQ STRAW PULP

1.INTRODUCTIONAs a kind of agriculture residues, straw occupies an important status in the non-wood papermaking material in China. Straw is herbaceous plant yearly, and composed with successive and organized cell groups that is similar with others plants. The construction of straw fiber has three obvious layers and the sequence is lamella, primary wall and second wall. Because the organization is loosen andporous, the lignin content is lower and the cooking liquor is easer to penetrate so…     

THE EVOLUTION OF FIBERLINE TECHNOLOGY IN AN ENVIRONMENTAL LIGHT

With the environment in focus three different fiberlines ranging over a 20-year-period are compared. It is concluded that the environmental operation has significantly been boosted over the years. Today's challenges in the R&D activities relating to fiberline technology include e.g. improved pulp yields and prevention of yellowing of fully bleached pulp. A method for determination of mill pulp yield is presented, and the latest modified cooking concept briefly discussed in relation to the higher yields obtained. The topic of yellowing is discussed and hot chlorine dioxide bleaching is presented as a tool to reduce the yellowing tendency.