脱盐水树脂再生水处理技术

介绍了云峰公司硫酸脱盐水装置产生的2种排放水,其中阳床再生排放水为含硫酸的废水,阴床再生排放水为含氢氧化钠的废水。为实现污水零排放,采用离子交换制水工艺、反渗透制水工艺、机械过滤器反洗工艺、阴、阳离子交换器再生工艺、混合离子交换器再生工艺、反渗透清洗流程将2种水分开处理,实现了回收使用。     

离子交换树脂再生效果的影响因素探讨

川化股份有限公司化肥厂一化合成系统所用脱盐水采用阴阳离子混合床交换制水,其优点是出水水质好且稳定,混床间断运行时对出水水质影响小,交换终点明显,装置集中、便于管理。混合床离子交换工艺是把阴、阳、惰性树脂按一定比例装填在同一个交换器内,被处理水经过混合离子床时,     

脱盐水站扩能改造

由于脱盐水站产水量达不到需水量要求,扩能改造工程将工业废水回用水与原脱盐水站一级反渗透产水混合后进入二级反渗透进行脱盐,降低后续混床进水的可溶性固体物质浓度,并新增1台混床与原混床并联,增加混床处理水量。扩能改造后,脱盐水站运行稳定,产水量满足锅炉补给水要求。     

离子交换器树脂泄漏原因分析及处理措施

动力厂供热车间阴、阳床离子交换器是供热车间及新、老脱盐站向公司化肥厂以及三胺厂等化工生产单位输送脱盐水的心脏设备，而脱盐水能否稳定、优质、足量地供给直接影响着公司各生产装置的安全稳定运行。因此，该离子交换器是脱盐水装置能否安、稳、长、满、优运行以及实现动力厂安全“三供”的重要因素。     

脱盐水站外排水回收利用技改

东明润邦化工有限公司脱盐水站使用的主要水处理设备包括多介质过滤器、超滤、一、二级反渗透及EDI等装置,对原水进行逐级处理,每经过一级过滤,就会有大量水外排,造成极大的浪费,为了对外排水回收利用,公司对脱盐水站进行了有效的改造,将脱盐水站外排水回收重新利用,一路作为循环水补水,一路去脱盐水站代替新鲜水,节约了大量的新鲜水,目前改造项目使用情况良好。     

双室沸腾浮动床在锅炉水处理中的应用

APPLICATIENDOUBLE-CHAMBERBOILINGFLOATIONGBEDINBOILERWATERTRETMENT1前言高温高压锅炉的补给水和某些电子工业用水,对水质的要求十分严格,一般要用脱盐水,有的甚至要用高纯水。为此,就需要对上述用水进行除盐处理、除盐的方法很多,如蒸馏法、电渗析法、反渗透法、离子交换法等,但以离子交换除盐应用最广。离子交换除盐常用的传统除盐设备是固定床离子交换器。双室沸腾浮动床是近年来研制成的一种新型化工设备,将其应用于锅炉水的除盐工艺中,具有效率高、水质好等众多优点,极具推广价值。目前,这一新…     

发电厂锅炉补给水系统逆流再生离子交换设备的特点与应用

在电力生产过程中,水处理系统至关重要,离子交换器是比较经典的水处理设备。论文就离子交换器中的逆流再生固定床在设计、运行中常见的问题提出了相应的应对方法,希望有益于电厂化学制水系统的安全经济运行。     

提高二级脱盐水周期制水量探讨

安庆石化水汽二级脱盐水处理装置包括预处理系统、一级脱盐系统、二级脱盐系统及相应的附属设施。2017年以来,由于树脂长期使用再生等原因,二级脱盐水混床的周期制水量逐步下降,由原来的5万吨/周期减少到4.2万吨/周期。主要探讨了混床周期制水量下降的原因,并提出恢复并提高二级脱盐系列的周期制水量的措施。     

二氧化硅泄漏原因分析及处理

1发现问题 河南省中原大化集团有限责任公司供水厂脱盐水处理系统目前有4套系列,软化水的弱酸阳床为固定床,采用顺流再生方式;一级除盐水装置为双室浮动床,采用对流再生方式;混床采用分布再生方式.近一段时间,其中一套系列投运制水期间,阴床、混床出水SiO2含量逐渐升高,其电导率合格,后来漏SiO2现象越来越严重,并导致脱盐水槽SiO2污染.系列夏季和冬季的分析报表数据如表1(脱盐水SiO2含量工艺控制指标:阴床≤50μg/L,混床≤20μg/L).     

离子交换器周期制水量下降原因分析探讨

离子交换器是水处理过程中常用的一种设备。从水源水质变化大、离子交换器树脂破碎严重、树脂混淆等原因导致离子交换器周期制水量下降进行分析,通过采取原水工艺优化、破碎树脂筛分和混淆树脂分离等措施,有效的提高了离子交换器周期制水量。     

合成氨煤气化工艺评述及工艺方案的选择

对比分析国内以煤为原料生产合成氨的煤气化工艺,主要对常压固定床富氧连续气化、恩德炉粉煤气化、灰熔聚流化床粉煤气化、德士古水煤浆加压气化、壳牌干煤粉加压气化以及拥有我国自主知识产权的多喷嘴对置式水煤浆气化、四喷嘴对置式干粉煤加压气化和两段式干粉煤加压气化等煤气化工艺从煤质要求、煤种适用范围、工艺操作条件、有效气含量、消耗情况与气化效率、环境影响等方面进行评论。结合项目所在地地理位置、煤质条件和经济环境等因素,选择合成氨煤气化技术为常压固定床富氧连续气化技术。     

Removal of metals and anions from drinking water by ion exchange

Five organic and two inorganic ion exchangers were evaluated for the removal of metals and anions from water of two drilled wells. Sodium titanate (CoTreat) and a chelating aminophosphonate resin were the most efficient exchangers in removing transition metals from the total of 1800 bed volumes processed. CoTreat was the best for almost all of the transition metals. The breakthrough level of manganese was below 1% with CoTreat even when its concentration in the feed water was high (1 mg/l). The weak acid cation resin took up transition metals relatively efficiently. Somewhat unexpectedly, the cation exchangers also removed arsenic from water. Arsenic may have been sorbed on iron species, which again was adsorbed and filtered by the exchanger beds. Most of the cation exchangers took up calcium and magnesium at low processing capacities (<400 BV), and the strong base anion resin took up nitrate, bromide and sulphate very efficiently below 700 bed volumes. Neither chloride nor fluoride was taken up by the exchangers tested.     

Mixed bed de-ionisation by weak electrolyte ion-exchange resins regenerated in situ by carbon dioxide

It has been shown that phenol-carboxylic types of weakly acidic cation exchangers have significant salt-splitting characteristics, which improve the kinetics of a mixed bed composed of weakly dissociated ion-exchange resins. This system seems to be effective for de-ionisation of high-salinity water and has produced water of suitable quality and sufficient break-through capacity. It was demonstrated that weak electrolyte ion-exchange resins in a mixed bed can be regenerated with water saturated with carbon dioxide with possible re-use of the gas.     

化学水处理阳离子浮动床的改造

针对水处理改扩建中一级水阳离子浮动床出现的出水质量差、运行周期短等问题 ,对其进行改造 ,通过改变床体类型 ,并采用固定床逆流再生工艺 ,以实现树脂完全充分地再生 ,从而保证了装置的正常供水 ,降低了酸的消耗 ,节约了生产费用。     

生物流化床处理乙二醇废水试验研究

为了考察生物流化床处理乙二醇废水的效果,把进入氧化沟前的乙二醇生产废水引入生物流化床中进行处理,并与氧化沟的处理效果进行对比。试验结果表明,生物流化床和氧化沟的HRT分别为15和70 h,CODCr平均去除率分别为85%和77%,去除容积负荷分别为4.16和2.85 kg/(m3.h)。单级流化床工艺出水CODCr的质量浓度大于60 mg/L,而两级串联生物流化床处理后的出水CODCr的质量浓度小于60 mg/L,平均去除率为96%,平均去除容积负荷为4.56 kg/(m3.h)。当进水水质波动范围较大时,生物流化床处理工艺比氧化沟具有更强的抗冲击负荷能力,出水水质更加稳定。     

MODELLING AND PRACTICAL OPERATION RESULTS OF A DRYER FOR WOOD CHIPS

A model of drying of fixed and moving bed in cross-flow is presented. A single particle model described as a multiple moving boundary problem applicable for an icy wood particle is proposed. The simultaneous drying and melting are described by shrinking cores and the effect of thermal storage is taken into account approximately. The results with both the single particle and the bed model compare favourably with reported laboratory measurements. The drying of a deep fixed bed is a two-stage process. A constant rate of drying period with saturated outlet air at constant temperature is followed by a decreasing rate of drying with increasing air outlet temperature and decreasing degree of saturation. The bed modelling is performed to support the development work of a boiler plant using a dryer. Practical operation of dryers within the boiler plants is discussed.     

双室固定床水处理设备的特点及案例研究

我国自行开发的双室固定床水处理设备具有出水质量好、药耗低、运行操作简单等优点,成为水处理改造中的首选设备。该文选取了四个典型的改造工程案例,介绍了改造方案及最终效果,最后对双室床的应用范围做了探讨。     

天然气部分氧化制合成气的研究进展

综述了天然气部分氧化制合成气的研究进展,包括天然气无催化部分氧化、固定床催化部分氧化、两段转化法、膜反应器新工艺、流化床反应工艺、氧化剂研究、微波辐射加热部分氧化、部分氧化的机理,以及部分氧化工艺的催化剂研究。     

The Optimum Heat Transfer Area of the Air Precooler in a Two-Stage Evaporative Cooler

The main objective of this study is to experimentally evaluate the effect of the air precooler heat transfer area on the effectiveness of a two-stage evaporative air cooler. To the best of our knowledge, this effect has not been studied before. In the experimental unit used, there were three identical heat exchangers to precool the ambient air prior to its flow into the direct evaporative cooling unit. These heat exchangers can work individually or be combined to control the total heat transfer area of the air precooler. In addition, the effectiveness of the two-stage system was measured as a function of the ratio between the mass flow rate of water flowing over the packing and the mass flow rate of the dry air passing through the packing; the effectiveness also depends on the mass flow rate of water flowing into the precoolers. The data obtained showed that there is an optimum value for the air precooler heat transfer area at which the thermal performance of the two-stage evaporative cooler has the maximum value. Moreover, the system effectiveness improved with the rate of flow of water into the first and the second precoolers. Note that the optimum value of the precooler heat transfer area should be determined accurately for each set of design and operating conditions.     

锅炉补给水处理系统的扩建方案与优化设计

在河南某火电厂扩建工程中,对整个锅炉补给水处理系统进行了深入的分析。根据电厂节约用水的要求,采用循环水排污水作水源,选用预处理、反渗透、一级除盐＋混床作为全厂锅炉补给水处理系统。设计中结合一期锅炉补给水条件,保留原有离子交换设备并在车间预留位置扩建1列离子交换设备,同时增设反渗透等预处理系统,为全厂选用了安全、合理并环保的锅炉补给水处理系统。