共查询到20条相似文献,搜索用时 218 毫秒
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随着废纸回用数量越来越多,其成分也越来越复杂,如各种增强剂、粘合剂的应用等,给废纸的碎解工作带来较大的困难,如碎解时间长、出浆率低、排渣多、电耗高、工人劳动强度大等,迫切要求能从工艺设备和电控设备上着手,以减轻工人劳动强度,降低生产成本。辅助碎解系统就是为解决此类问题应运而生的。1新辅助碎解系统流程图1为中山联合鸿兴造纸有限公司碎解工段的系统流程,处理对象为美国废纸#11、欧洲废纸A5、A2等。辅助碎解系统主要由杂质分离机、圆筒筛、浆泵、气动闸阀等组成。其主要作用是把经过水力碎浆机碎解剩下的一部分难碎解的废纸片… 相似文献
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浙江桐乡福利板纸厂增上一条日产200吨的芯浆线,利用3号美废作原料生产涂布白纸板。由于3号美废杂质含量较多,如果采用低浓连续碎解系统,杂质会细化,给后续工段造成负担。为此,选用了济宁华一轻工机械有限公司引进美国KBC公司的φ3000mm鼓式碎浆机。四届该设备将于今年10月供货,标志着华一轻机与美国KBC公司签定的鼓式碎浆机制造技术已进入全面实施阶段。大型废纸碎解设备的制造技术将填补国内空白。鼓式碎浆机落户浙江桐乡@郭庆立 相似文献
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锯齿轧花机的排杂装置,分上下两部分。由于上下排杂装置的位置不同,排出杂质的种类及其比例也不同。在上排装杂装置处,排出的杂质大量的是不孕籽,其次是大破籽皮、棉籽仁等较大较重的杂质。而在下排杂装置处,排出的杂质大量的是索丝、棉结及体积较小的不孕籽、破籽皮、籽屑、碎棉仁等,其次是体经的碎棉叶等物。 相似文献
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使用过的无菌纸包装是制浆造纸工业一种优质纤维的来源,对无菌纸包装的碎浆工艺进行了研究,同时对无菌纸包装与OCC混合碎浆的可行性进行了探讨。结果表明,无菌纸包装单独碎浆时,提高碎浆浓度、碎浆温度和转子转速可以促进其碎解,提高纸浆得率。OCC与无菌纸包装的碎浆是同步进行的,因此它们混合碎浆是可行的,随着混合废纸中无菌纸包装比例的提高,纸浆的打浆性能、抗张强度和白度都有所提高。 相似文献
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This study focuses on the electrolytic regeneration of spent chromium plating solutions. These solutions contain a significant amount of chromium and a lesser amount of other heavy metals, which makes them a significant environmental concern and an obvious target for recycling and reuse. The type of separator used is extremely critical to the performance of the process because they are the major resistance in the transport-related impurity (Cu(II), Ni(II), and Fe(III)) removals from contaminated chromic acid solutions. A Nafion 117 membrane and a ceramic diaphragm separator traditionally used in the industry were tested for comparison. It was found that the mobilities of Cu(II) and Ni(II) were similar and higher than that of Fe(III) using both separators. The mobility of each cation was smaller in the Nafion membrane than in the ceramic diaphragm. The measured conductivity of the ceramic diaphragm was slightly higher than that of Nafion membrane. However, the Nafion membrane was much thinner than the ceramic diaphragm resulting in the system using the Nafion membrane having higher impurity removal rates than the system using the ceramic diaphragm. The removal rates were approximately equal for Cu(II) and Ni(II) and lowest for Fe(III). Both current and initial concentration affected the removal rates of the impurities. Modeling results indicated that a system using a Nafion separator and a small catholyte/anolyte volume ratio was better than a system using a ceramic separator for removing impurities from concentrated plating solutions if the impurities transported into the catholyte are deposited or precipitated. 相似文献
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Electrostatic separation is an effective and environmentally friendly method for recycling comminuted waste printed circuit boards (PCB). As a classical separator, the roll-type corona-electrostatic separator (RTS) has some advantages in this field. However, there are still some notable problems, such as the middling products and their further treatment, impurity of nonconductive products because of the aggregation of fine particles, and stability of the separation process and balance between the production capacity and the separation quality. To overcome these problems, a conception of two-step separation is presented, and a new two-roll type corona-electrostatic separator (T-RTS) was built As compared to RTS, the conductive products increase by 8.9%, the middling products decrease by 45%, and the production capacity increases by 50% in treating comminuted PCB wastes by T-RTS. In addition, the separation process in T-RTS is more stable. Therefore, T-RTS is a promising separator for recycling comminuted PCB. 相似文献
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在DIP系统中,过氧化氢酶可以在短时间内降低H_2O_2浓度,造成碎浆和浮选白度难以提高,增加各个化学药品的消耗。实验结果表明:DIP系统中存在过氧化氢酶时,碎浆白度最低降到40.6%ISO,浮选白度最高达到45.4% ISO,与系统中不存在酶相比白度值降低较大。在该碎浆和浮选条件下测定酶活,酶活性较强。 相似文献
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碎解条件对废纸碎化、油墨剥离和浮选脱墨的影响 总被引:2,自引:0,他引:2
综合介绍了各种碎解条件对废纸碎化、油墨剥离和浮选脱墨的试验结果。认为能达到碎解浆中碎纸片含量降到1%时的最佳条件,即相当于满足了最短的碎解时间、最低的能耗和最好的浮选脱除油墨的条件,有几种方式,可以根据实际需要选择其中最适合的方式加以应用。 相似文献
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白水回用于废纸的碎浆,将使系统中含有较高的钙离子,在后续的过氧化氢漂白中易生成硅酸钙垢物.本研究在脱墨浆(钙离子含量为绝干浆的0.23%)中加入聚丙烯酸钠、二乙烯三胺五甲基膦酸(DTPMPA)和硫酸镁等硅酸钙阻垢剂,考察了它们对过氧化氢漂白效果的影响.结果表明,聚丙烯酸钠、DTPMPA和硫酸镁均能使漂白效果有一定的改善, 特别是聚丙烯酸钠和DTPMPA能在较大的用量范围内(绝干浆的0-0.5%)使漂白效果持续改善,硫酸镁则在绝干浆用量的0.69%时达到最佳的漂白浆白度,继续增大硫酸镁用量使漂白效果下降. 相似文献
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实验室高浓碎浆机的设计 总被引:1,自引:0,他引:1
高浓碎浆是废纸碎解技术中较新的发展。本文介绍了实验室高浓碎浆机的工作原理及各部分的设计,并对设计中的重点,转子、槽体等进行了详细的阐述。 相似文献
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该实验选择废旧瓦楞箱纸板(OCC)为研究对象,从预处理时间、浆浓、转子转速和碎解温度等几个方面研究不同的碎解条件对废纸碎化的影响,确定在不添加碎解助剂情况下的最优碎解条件,即满足碎解所需时间最短、能耗较低和获得碎纸片含量最少的条件;其次,实验通过选用6种不同的表面活性剂分别添加到OCC废纸中,优选出最佳的碎解助剂十二烷基苯磺酸钠,同时,研究预处理时间、碎解温度和十二烷基苯磺酸钠用量对废纸碎化的影响;最后,对未添加碎解助剂和添加碎解助剂的OCC废纸浆的滤水性能和纤维特性做了评价和比较. 相似文献