共查询到20条相似文献,搜索用时 78 毫秒
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针对节能减排、绿色环保的时代要求,研究了纸浆废液接枝共聚萘系减水剂制备木聚萘系减水剂的可行性。通过调整木质素减水剂和萘系减水剂的质量比,优化接枝共聚时间和温度,成功实现了两种减水剂的接枝共聚。红外光谱分析表明,形成的木聚萘系减水剂是一种新型物质,其性能优于萘系减水剂。试验表明,木聚萘系减水剂具备高减水、高保坍的性能,克服了萘系减水剂坍落度损失过快的缺点。 相似文献
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本文阐述利用萘系高效减水剂生产过程中排放的废料为主原料配制早强高效减水剂的原理及方法,所配制的早强减水剂具有减水率高、早强效果好等特点,为有效利用萘系减水剂生产排放的废渣开辟了途径。 相似文献
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聚羧酸改性萘系高效减水剂的研究 总被引:1,自引:0,他引:1
合成了一种聚接酸改性菜磺酸甲醛缩合物高效减水剂,其减水串比英系高效减水剂高60%,2小时坍落度几乎没有损失,终凝时间比蔡系减水剂延迟50分钟。 相似文献
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讨论了采用离子交换重量法测定非萘系高减水中硫酸钠含量的方法,解决了该减水不适用重量法测定的实际问题。 相似文献
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萘系高效减水剂合成工艺中水解反应过程的研究 总被引:1,自引:0,他引:1
萘系高效减水剂合成工艺中水解反应过程的控制对最终产品的减水性能影响很大。对萘系高效减水剂合成工艺中的水解过程进行了系统的研究,结果表明,最佳水解终了酸度为28%~30%;由于水解终了酸度检测的滞后性,所以使用水解用水量和酸度双因素比单用水解终了酸度控制水解过程更准确;在满足酸度要求的情况下,尽可能减少水解反应用水量可有效提高萘系高效减水剂的减水性能。 相似文献
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The waste water of the potato-starch factory of the AVEBE in De Krim (The Netherlands) passed, during the anaerobic purification, a sedimentation pond, a first upflow reactor (in which there was practically no sludge retention) and a UASB methane reactor. The fermentation of free-amino acids and smaller peptides occurred in the sedimentation pond and first reactor. Proteins and longer peptides were degraded in the first reactor and in the methane reactor. The decrease in COD and TOC content of the waste water between influent sedimentation pond and effluent methane reactor was 83 and 71%, respectively. In the effluent of the first reactor, 60% of the inorganic sulfur was present as sulfide. 相似文献
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《Water research》1996,30(3):644-648
Large amounts of de-icing agents consisting mainly of diethylene glycol and propylene glycol are used at many airports during the winter time. At modern airports a large proportion of the mixture of de-icing agents and meltwater is recycled and reused. Meltwater containing smaller amounts of de-icing agents is usually collected in retention basins and discharged into municipal sewage treatment plants. Extensive investigations have proved that waste water containing diethylene glycol may cause severe disturbances in sewage treatment. Only by avoiding shock loads and by maintaining an adapted activated sludge at the sewage treatment plant especially at a low waste water temperature can ensure that COD and BOD effluent values do not exceed critical limits. 相似文献
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通过对废旧混凝土透水砖制备工艺中原料清洗工艺、搅拌工艺、成型工艺、养护工艺等的研究,得出其与透水砖强度、透水系数的关系,从而确定清洗,搅拌工艺,得到最佳的成型压力、保压时间以及养护手段. 相似文献
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三聚氰胺高效减水剂在石膏砌块生产中的应用 总被引:1,自引:0,他引:1
赵建华 《墙材革新与建筑节能》2006,(7):30-31
水泥行业广泛应用的三聚氰胺高效减水剂是一种水溶性聚合物,其应用于石膏砌块生产,减水效果明显,可大大缩短制品干燥周期,节约能耗,有利于提高企业经济效益。 相似文献