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麦草低温氧碱蒸煮浆料性质的研究 总被引:1,自引:1,他引:0
麦草碱法蒸煮后,浆料不经洗涤,直接通入氧气进行处理。对麦草氧碱蒸煮段用碱量、氧压、温度和时间四因素三水平方差分析表明,用碱量对得率的影响最大,时间对其影响最小;浆料黏度下降并不明显;用碱量对浆料卡伯值的影响最大,氧压对其影响最小。在较适宜的工艺条件下氧碱蒸煮结果为:浆料得率52.6%;浆料黏度为1 042 mL/g,比单段碱法蒸煮后浆料黏度(1 099 mL/g)降低5.2%;浆料卡伯值17.9,比单段碱法蒸煮后浆料卡伯值(20.3)降低11.8%;黑液黏度为3.4 mPa.s,比单段碱法蒸煮黑液黏度(5.1 mPa.s)降低33.3%。 相似文献
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通过对枫香树材硫酸盐蒸煮的用碱量、硫化度、温度和保温时间四因素三水平方差分析工艺技术研究发现,在所选的四因素三水平内,用碱量对浆料得率和卡伯值的影响最大,硫化度对浆料得率和卡伯值的影响最小。枫香树材硫酸盐蒸煮较为适宜的工艺条件为:用碱量17%(Na2O计),硫化度20%,温度165℃,保温时间60 min,液比1∶6。另外,在枫香树材硫酸盐蒸煮过程中添加AQ,对提高蒸煮脱木素选择性具有明显的效果。 相似文献
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为了研究硅对黑液黏度的影响,向麦草碱法蒸煮黑液中添加定量的二氧化硅、麦草灰分和硅酸钠,分析不同硅化物对黑液黏度的影响。研究发现,相对于麦草灰分和二氧化硅,硅酸钠更能增加麦草黑液的黏度。硅酸钠对不同浓度麦草黑液黏度的影响顺序为:高浓黑液≥中浓黑液>低浓黑液。当硅酸钠占黑液总固形物的量大于15%(SiO2计)时,其对低浓度黑液的黏度造成显著影响;当硅酸钠占黑液总固形物的量为13%~15%(SiO2计)时,其对中浓黑液的黏度有显著影响;当硅酸钠占黑液总固形物的量为11%~13%(SiO2计)时,其对高浓黑液的黏度有显著影响。 相似文献
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枫香树材硫酸盐浆氧脱木素工艺技术 总被引:1,自引:1,他引:0
通过对枫香树材硫酸盐浆氧脱木素用碱量、氧压、温度和时间四因素三水平方差分析工艺技术研究,在用碱量2%~4%、氧压0.3~0.7 MPa、温度90~120℃和时间60~120 min内,得到枫香树材硫酸盐浆氧脱木素较为适宜的工艺条件:用碱量3%,氧压0.7 MPa,温度105℃,时间60 min。其氧脱木素结果为:得率89.8%,卡伯值7.6,黏度559.2 mL/g,白度48.2%ISO。 相似文献
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1 INTRODUCTION China is one of the largest non-wood pulping countries because of the shortage of forest resources. Usually pulp mills are located in the countryside in China and caustic soda or lime is used as cooking reagent, which produces high pH wastewater with high content of organic pollutants. Black liquor from straw digestion contains high content of silicate and is highly viscous, so it is difficult to recover alkali from the black liquor. The investment of alkali recovery appa… 相似文献
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Cleaner Production of Wheat Straw Pulp 总被引:1,自引:0,他引:1
A pulping method using NH4OH with less amount of KOH as cooking liquor on wheat straw was developed. KOH could reduce consumption of NH3 and cooking time for its strong alkalinity. The effects of various pulping conditions such as composition of cooking liquor, liquid-to-solid ratio, maximum temperature, cooking time to the maximum temperature and cooking time at the maximum temperature were studied. Experimental results indicated that the rate of delignification was 85.12% and the pulp yield was 49.65% under suitable pulping conditions. It looks promising to use black liquor containing nitrogen, phosphorus, potassium and organic substance as fertilizer resources for agricultural production. A new pattern of ecological cycling may be set up between paper industry and farming. 相似文献
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本文综述了碱法制浆黑液以及碱木素在石油工业中的应用。黑液可以直接作为低粘度稠油的驱油剂,也可作为高粘度稠油的降粘剂。与蒸汽驱或蒸汽吞吐配合使用,可显著地提高稠油的采收率。从黑液中分离出的碱木素,可用作钻井泥浆添加剂、注水或注蒸汽采油的堵水剂和调剖剂、表面活性剂驱油的牺牲剂、污水处理的絮凝剂等。在石油工业中充分利用碱法制浆黑液和碱木素,对解决黑液污染问题,降低油田化学剂成本,具有重要意义。 相似文献
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1 INTRODUCTION Under the pressure of rising consumption on wood resource, more attention has been paid to using non-wood raw materials in papermaking industry. Pulping on non-wood fiber material is expected to increase from 7%—8% at the present to 10%—15% in 2010 in the world[1]. Non-wood material, particularly wheat straw, are exploited as the main raw material for papermaking in China because of the limited wood resource with a forest coverage of only 13.94%[2]. The main problem that … 相似文献
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制浆造纸废水的生化性能研究 总被引:2,自引:1,他引:1
对麦草半化学浆黑液、废纸脱墨废水及纸板厂综合废水的可生化性进行了研究。研究结果表明,3种废水的pH值经微生物自然酸化后满足厌氧反应器正常运行要求;3种废水均缺少磷元素,废水处理时按CODBD与氮和磷的质量比为300~500∶5∶1的比例添加磷盐;3种废水均可进行厌氧生物处理,其可降解性分别为70%,75%,72%,其中麦草半化学浆黑液厌氧处理时须进行稀释或采用适当的脱毒措施。 相似文献
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《分离科学与技术》2012,47(19):2705-2712
Abstract The conventional black liquor regeneration process is not always suitable for pulping plants of nonwood fibers due to the unfavorable ratio of organic to inorganic solids. This paper presents an alternative treatment based on an electrolysis process of the soda black liquor from straw pulping. This alternative method minimizes the environmental impact by recovering the caustic at the same time that the liquor is acidified, which favors the later separation of the lignin. 相似文献
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针对碱法草浆黑液成份复杂、污染严重、不易治理的特性,运用膜辅助电解技术处理草浆黑液,对回收草浆黑液中残碱的可行性进行了研究。研究结果表明:草浆黑液经过处理后,90%的残碱可以被有效回收,吨碱平均能耗4200kW·h。 相似文献