共查询到18条相似文献,搜索用时 125 毫秒
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结合具体工程设计,对几种常用的纯水制备系统优缺点进行了比较。经过分析、研究,推出“阴床+混床”作为一级反渗透装置后续化学除盐工艺,对比以往常用的反渗透装置后续化学除盐工艺,具有最低的设备投资,最少的酸碱耗量及废水排放量。 相似文献
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对汉川三期工程和蒲圻二期工程两个超超临界燃煤机组的锅炉补给水系统的工艺进行了比较。得出两种工艺均能满足出水水质要求,一级除盐+混床运行操作及管理相对复杂,维护量较大,且对环境有一定的污染,但经济上综合年费较低;二级反渗透+混床除盐系统占地小、安装方便、运行操作及控制相对简单,环境污染较小,但综合年费较高。 相似文献
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离子交换树脂法制化学除盐水,阴床"钠离子放大"会降低阴床及后继混床除盐效率,同时会造成已被吸着的阴离子,从阴离子交换树脂中解吸出来,造成除盐水不合格。 相似文献
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在氰乙酸和三聚氯氰等产品生产的同时副产大量的含氰氯化钠废盐,这些工业废盐含有氰化物和有机物等杂质,需精制后才能回收再利用。采用流化床高温氧化方法对含氰工业废盐中有氰化物和有机物的杂质做脱除实验研究。实验结果表明,温度在700 ℃以上、停留时间为3 min时,经高温流化氧化处理后工业废盐中的总有机碳(TOC)、无机铵和总铵可达到离子膜烧碱用原料盐标准;处理后的工业盐中未检测到氰。该研究为含氰工业废盐精制过程和装置的进一步放大提供了实验依据。 相似文献
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A novel mixed‐mode expanded bed adsorbent with anion‐exchange properties was explored with benzylamine as the functional ligand. The cellulose composite matrix, densified with stainless steel powder, was prepared with the method of water‐in‐oil suspension thermal regeneration. High activation levels of the cellulose matrix were obtained with allyl bromide because of the relative inertness of the allyl group under the conditions of the activation reaction. After the formation of the bromohydrin with N‐bromosuccinimide and coupling with benzylamine, the activated matrix was derived to function as a mixed‐mode adsorbent containing both hydrophobic and ionic groups. The protein adsorption capacity was investigated with bovine serum albumin as a model protein. The results indicated that the prepared adsorbent could bind bovine serum albumin with a high adsorption capacity, and it showed salt tolerance. Effective desorption was achieved by a pH adjustment across the isoelectric point of the protein. The interactions between the cell and adsorbent were studied, and the bioadhesion was shielded by the adjustment of the salt concentration above 0.1M. Stable fluidization in the expanded bed was obtained even in a 2% (dry weight) yeast suspension. The direct capture of target proteins from a biomass‐containing feedstock without extra dilution steps could be expected with the mixed‐mode adsorbent prepared in this work, and this would be especially appropriate for expanded bed adsorption applications. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 相似文献
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对国内蒸汽冷凝液回收和水处理工艺流程进行比较,分析各类离子交换器工作原理和工艺特征,结合煤气化空分装置工艺特征和蒸汽冷凝液水质状况,设计单室浮动床阳床、单室浮动床阴床、混床冷凝液回收工艺。工程投用后,运行稳定,经济技术指标良好。 相似文献
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P. Pronk C.A. Infante Ferreira G.J. Witkamp 《Chemical Engineering and Processing: Process Intensification》2008,47(12):2140-2149
Eutectic freeze crystallization is a promising separation technique to produce salt and ice crystals with very high purities and requires less energy than competitive evaporative crystallization techniques. A drawback of this technique is crystallization fouling, which seriously reduces heat transfer rates. Solid–liquid fluidized bed heat exchangers may be attractive crystallizers for this purpose, since they have demonstrated to prevent severe crystallization fouling, for example of ice crystals. This paper presents crystallization experiments with a single-tube fluidized bed heat exchanger. A first experimental series showed that fluidized beds are also able to prevent salt fouling during cooling crystallization from KNO3 or MgSO4 solutions. A second series revealed that fouling during eutectic freeze crystallization is more severe than during separate salt or ice crystallization and is therefore difficult to prevent by the fluidized bed. The explanation for this phenomenon is that the salt crystallization process strongly reduces the solute mass transfer limitation for ice crystals growing on the wall resulting in an increased growth rate and more severe crystallization fouling. The addition of a non-crystallizing component strongly reduces fouling and enables to perform eutectic freeze crystallization in fluidized bed heat exchangers for industrial applications. 相似文献
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利用西台吉乃尔盐湖盐田老卤池中低钾高硫光卤石混盐矿为原料,及硫酸钾镁肥生产车间排出的母液及盐田水氯镁石,通过兑卤工艺-先正浮选提取氯化钾-后反浮选提取低钠光卤石混盐的工艺流程,并对光卤石混盐矿粒度、母液量、分解时间、正反浮选药剂相互影响关系等主要因素进行条件实验,验证工艺流程的可行性并获得最佳实验条件;同时通过先反浮选提取硫酸钾镁肥-后正浮选提取氯化钾的工艺流程,验证其可行性并取得试验钾回收率。 相似文献
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烷基苯生产工艺对烷基苯磺酸钠物化性能的影响 总被引:3,自引:0,他引:3
介绍了烷基苯生产工艺的发展动向以及几种已工业化的烷基苯工艺生产的烷基苯组成及相应的烷基苯磺酸盐的物化性能,认为固定床烷基化工艺是今后研究和发展的方向。 相似文献
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低压蒸汽锅炉给水处理设施改造效果分析 总被引:1,自引:1,他引:0
将原有的钠型离子交换改造为预处理-反渗透-混床工艺作为低压蒸汽锅炉补给水的处理系统。工程运行结果表明,改造后的系统提高了锅炉给水的水质,降低了锅炉水中的盐含量,大大降低了锅炉发生过热器爆管的几率。 相似文献