环己醇分离塔回流罐水包脱氧高纯水回收利用

针对环己醇装置分离塔回流罐中的脱氧高纯水直接外排、生产用脱氧高纯水消耗大、废水处理系统负荷增加的现状,通过设置液-液分离水包,将脱氧高纯水与反应产物进行分离,并将分离出的脱氧高纯水送至环己烯水合反应系统,大大减少了管网脱氧高纯水用量,节约了环己醇生产成本,取得了良好的经济效益。     

离子交换树脂在纯水制备方面的应用

本文详解了离子交换树脂在纯水制备方面的应用。阐述了用离子交换树脂生产超纯水、高纯水的工艺流程及其特点,综述了离子交换树脂在纯水制备方面的应用现状。     

关于涂装车间二级纯水管路冲洗的研究

首先对纯水制备系统进行了简介,然后以免中涂涂装车间面涂区域纯水管道的冲洗为例,对二级纯水管道冲洗过程进行了研究,并总结了经验。     

浅谈涂装车间纯水系统设计说明及技术要求

主要介绍了涂装车间纯水需求工位及相关设备,并对反渗透纯水制备装置进行讨论。     

纯水制备控制系统的故障分析及改造方案

介绍纯水制备控制系统在实际运行中的常见故障,根据控制理论,结合该种纯水制备的控制系统设计思路对造成故障的原因进行剖析,并提出了相应的改造方案。纯水制备系统一般为大中型企业生产中的公用工程类设备系统,具有开车时间长、维修周期长、检修时间紧等特性。如何有效地保障纯水制备系统长期稳定运行至关重要。结合纯水制备控制系统在实际运行中出现的故障展开分析并提出相应的改造方案。     

基于PLC的纯水高压泵串级变频控制

在纯水处理系统中,利用PLC串级控制回路调节高压泵变频器,成功地解决了原来纯水生产过程中反渗透（RO）膜进口压力波动、产水量不稳、工频运行下电机发热的问题,实现了纯水产水量和RO膜压力的自动控制。     

液压传动的重要研究方向——纯水液压传动

纯水液压以其绿色环保等特性成为液压界的重要研究方向。论述了纯水介质的含义,讨论了其研究内容和应用趋势,分析了纯水液压传动的优势,研究了由于其缺点造成的负面影响,阐述了解决泄漏、密封、润滑、磨损、腐蚀、气蚀等关键问题的措施。     

反渗透纯水在液压传动中的应用分析

文章探讨了在液压传动中,二级反渗透纯水的应用可行性,分析了纯水应用于液压传动系统中的优势与不足。     

化学水处理装置的优化运行及改进措施

尼龙66盐生产需要纯水,中国神马尼龙66盐公司的纯水系统在投产时遇到一些设计不当及运行不合理的问题,影响生产。在分析存在问题的基础上,采取一些改造措施,从而保证了纯水装置的正常及低耗运行。     

给大功率电热纯水器加装安全自动保护仪

15kW电热纯水器广泛应用于化学、生物、医疗等需要纯水的单位，用这样大功率的电热纯水器时规定要专人看管，否则在无人看管的情况下，当到了危险水位时很容易被烧毁．因此很需要有一台自动安全保护装置配合使用，无需专人看管，能使大功率电热纯水器确保安全．为此特为大功率电热纯水器设计和制作了一台电热纯水安全自动保护仪，经多年使用，保护仪性能良好，达到了理想效果．该保护仪有如下的性能：1．控制功率：ny可以控制ThW以内的大功率三相电热纯水器）；1控制灵敏度：＜2秒（只要纯水器内的水位一过安全水位线即自动在2秒内关闭纯…     

Diffusion of some dyes in aqueous polymer solutions

The diffusion of both Direct Blue 76 and acid orange dyes in aqueous dilute polymer solutions was studied using the capillary method. The polymer systems studied included dilute solutions of carboxymethyl cellulose, polyethylene oxide and polyacrylamide. It was found that the diffusion coefficients of the two dyestuffs in carboxymethyl cellulose solutions are higher than that in pure water, while in polyacrylamide solutions the values of the coefficients are lower than that in pure water. In case of polyethylene oxide solutions, the diffusion coefficient of Direct Blue 76 was found to be lower than that in pure water, whereas that of acid orange was found to be higher than that in pure water. The diffusion coefficients of both dyes were found to decrease with increasing polymer concentration in the case of polyethylene oxide and polyacrylamide, whereas in the case of carboxymethyl cellulose the diffusion coefficients increased with polymer concentration. With change of temperature, the diffusion coefficients of both dyes in the three polymer solutions were found to obey the Arrhenius equation. The activation energy for diffusion of the two dyes was calculated in pure water, as well as in the different polymer solutions.     

PVPK30和Tween80对中空纤维超滤膜结构和性能的影响

通过考察添加剂-聚乙烯吡咯烷酮（PVPK30）和Tween80对杂萘联苯聚醚砜酮（PPESK）中空纤维超滤膜结构和分离性能的影响，发现：随高分子添加剂聚乙烯吡咯烷酮K30浓度的升高，膜水通量减小，截留率基本无变化，膜结构逐渐由指状结构转变成海绵状结构。有机大分子添加剂Tween80可以提高膜的水通量，但膜结构不随添加剂浓度而改变，均为指状结构。当Tween80浓度小于5wt％时，随Tween80浓度的增加，膜水通量升高，截留率下降。比较不同凝胶浴温度下的膜分离性能可以看到，凝胶浴温度提高可以显著提升膜的纯水通量。     

Solubility and Apparent Specific Volume of Some Pharmaceutical Salts in Propylene Glycol + Water Mixtures at 298.15 K

The equilibrium solubility of three pharmaceutical salts, namely, sodium naproxen (Na.NAP), procaine hydrochloride (PC.HCl), and lysine clonixinate (Lys.Clon), was determined in propylene glycol (PG) + water mixtures at 298.15 K. If the mole fraction concentration scale is considered, the mixtures’ composition-dependence on solubility was different for these drugs. Thus, the solubility of Na.NAP increased nonlinearly from pure water to pure PG. By contrast, the solubility of PC.HCl decreased nonlinearly from pure water to pure PG. In a different way, the solubility of Lys.Clon increased from pure water to the mixture with mass fraction of PG, w₁ = 0.80, and later, it decreased to reach a lower value in pure PG. A good correlation of the solubility data was obtained by using the modified NIBS/R-K model. Otherwise, the apparent specific volumes at saturation of these drugs were also calculated in all the mixtures under study.     

SORPTION BEHAVIOR AND PRELIMINARY PERVAPORATION RESULTS OF CROSS-LINKED POLYVINYLALCOHOL AND POLYDIMETHYLSILOXANE MEMBRANES PREPARED FOR THE SEPARATION OF WATER-ETHYLACETATE MIXTURES

Since pervaporation process is the coupling of solution and diffusion mechanisms, a sorption study was carried out with membranes prepared by cross-linking polyvinylalcohol (PVA) and polidimethylsiloxane (PDMS). Tartaric acid (Tac) was used as the cross-linking agent for PVA, and a commercial cross-linking agent was used for PDMS. Sorption experiments were carried out at 30-50°C temperature range in pure water and ethyl acetate using the films prepared. The PVA and PDMS films prepared preferentially sorb water and ethylacetate, respectively. A pervaporation study at 30°C was carried out for pure ethylacetate and pure water, and mixtures of ethylacetate containing 2 and 2.5 wt% water using 100 μm thick PVA membrane. The results indicate that the PVA membrane prepared is extremely selective for water.     

Sorption behavior and preliminary pervaporation results of cross-linked polyvinylalcohol and polydimethylsiloxane membranes prepared for the separation of water-ethylacetate mixtures

Since pervaporation process is the coupling of solution and diffusion mechanisms, a sorption study was carried out with membranes prepared by cross-linking polyvinylalcohol (PVA) and polidimethylsiloxane (PDMS). Tartaric acid (Tac) was used as the cross-linking agent for PVA, and a commercial cross-linking agent was used for PDMS. Sorption experiments were carried out at 30-50°C temperature range in pure water and ethyl acetate using the films prepared. The PVA and PDMS films prepared preferentially sorb water and ethylacetate, respectively. A pervaporation study at 30°C was carried out for pure ethylacetate and pure water, and mixtures of ethylacetate containing 2 and 2.5 wt% water using 100 w m thick PVA membrane. The results indicate that the PVA membrane prepared is extremely selective for water.     

Cellulose acetate and sulfonated polysulfone blend ultrafiltration membranes. I. Preparation and characterization

Modification of polymeric membrane materials by incorporation of hydrophilicity results in membranes with low fouling behavior and high flux. Hence, Polysulfone was functionalized by sulfonation and ultrafiltration membranes were prepared based on sulfonated polysulfone and cellulose acetate in various blend compositions. Polyethyleneglycol 600 was employed as a nonsolvent additive in various concentrations to the casting solution to improve the ultrafiltration performance of the resulting membranes. The total polymer concentration, cellulose acetate, and sulfonated polysulfone polymer blend composition, additive concentration, and its compatibility with polymer blends were optimized. The membranes prepared were characterized in terms of compaction, pure water flux, membrane resistance, and water content. The compaction takes place within 3–4 h for all the membranes. The pure water flux is determined largely by the composition of sulfonated polysulfone and concentration of additive. Membrane resistance is inversely proportional to pure water flux, and water content is proportional to pure water flux for all the membranes. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 1749–1761, 2002     

离子交换树脂制备超纯水工艺的影响因素研究

介绍了电子级超纯水精制混床离子交换树脂的特点,以出水电导率和总有机碳为考察指标,研究了进水质量、运行流量和树脂粒度均匀性等主要因素对电子级超纯水精制混床离子交换树脂出水质量的影响。研究结果表明,出水质量随着进水质量的提高而提高,运行流量控制在50~70BV/h时最佳,采用粒度更均匀的树脂出水质量和周期制水量更好。在一定的运行条件下,电子级超纯水精制混床离子交换树脂完全能满足电子行业对出水水质的要求。     

减水剂与增强剂在全碳粉生坯中的应用

寻找到适用于全碳粉生坯的减水剂和增强剂，并从热力学、胶体化学等方面对减水剂和增强剂在全碳粉生坯中的作用机理进行了初步探讨。     

制取纯水装备的自动设计系统

综合应用数据库、高级语言和绘图软件研制制取纯水装备自动设计系统。概括介绍了系统研制方案、各模块的划分与功能及制取纯水工艺流程的制定。