FM21型离子膜电解槽问题分析

针对FM21型离子膜电解槽运行中离子膜穿孔、进槽盐水供应故障,检修后送电前盐水杂质含量多,停槽时阳极液中有效氯含量多、碱液中铁和盐含量高等问题,提出了应对措施。     

颇尔膜过滤器应用于一次盐水运行总结

探求了颇尔膜过滤器的应用工艺,分析了颇尔膜过滤器发生断裂等异常现象的原因。从运行控制、安装等方面改进,稳定了颇尔膜过滤器运行,延长了膜组件的使用寿命,发挥了生产装置的最大效能。     

氯气余热利用

通过技术改造,利用电解工序氯气所带的热能与精盐水换热,从而达到节能减排目的,年节约蒸汽约1.5万t。     

BiTAC-866复极式离子膜电解槽运行中出现的问题与处理措施

通过对复极式离子膜电解槽运行中受到入槽低浓度盐水的侵害和入槽高浊度盐水浸泡而出现的异常问题进行跟踪监测分析,提出了延长电解槽运行寿命,提高装置运行性能的有效措施。介绍了美国杜邦N—982膜在受到高浊度盐水浸泡后,使之性能再生的措施。     

喷涂聚脲防水涂料在卤水储存池的施工与应用技术

介绍了卤水储存池防水防腐工程所用的喷涂聚脲防水涂料及相关辅材,并且详细叙述了该防水防腐工程的施工工艺。     

Rapid and complete destruction of perchlorate in water and ion-exchange brine using stabilized zero-valent iron nanoparticles

Perchlorate has emerged as a widespread contaminant in groundwater and surface water. Because of the unique chemistry of perchlorate, it has been challenging to destroy perchlorate. This study tested the feasibility of using a new class of stabilized zero-valent iron (ZVI) nanoparticles for complete transformation of perchlorate in water or ion-exchange brine. Batch kinetic tests showed that at an iron dosage of 1.8 g L(-1) and at moderately elevated temperatures (90-95 degrees C), approximately 90% of perchlorate in both fresh water and a simulated ion-exchange brine (NaCl=6% (w/w)) was destroyed within 7h. An activation energy (Ea) of 52.59+/-8.41 kJ mol(-1) was determined for the reaction. Kinetic tests suggested that Cl(VII) in perchlorate was rapidly reduced to chloride without accumulation of any intermediate products. Based on the surface-area-normalized rate constant k(SA), starch- and CMC-stabilized ZVI nanoparticles degraded perchlorate 1.8 and 3.3 times, respectively, faster than non-stabilized ZVI particles. Addition of a metal catalyst (Al, Cu, Co, Ni, Pd, or Re) did not show any reaction improvement. This technology provides an effective method for complete destruction of perchlorate in both contaminated water and brine.     

Chemical, Microbiological, and Sensory Quality of Cod Products Salted in Different Brines

ABSTRACT: Studies were carried out on the effect of different brines containing high concentrations of calcium chloride (CaCl₂, 0.8%w/w), magnesium chloride (MgCl₂, 0.4%w/w), and potassium chloride (KCl, 50%) on the chemical (chloride and moisture contents), microbial (total viable counts, total coliforms, enterococci, and staphylococci), and sensory quality of salted cod. The brines were prepared from combinations of the Ca, Mg, and K ions and sodium chloride (NaCl) at pH 6.5 and 8.5. Additionally, 3 salts (one composed solely of NaCl, another commercial sea salt from the southern Europe and, finally, a natural salt from northern Europe) were also tested. Principal component analysis structured the chemical and microbiology data in 3 clusters: (1) an extreme cluster, formed by cod brined in the commercial sea salt, which achieved the highest microbiological counts, namely 4.1 log CFU/g on plate count agar (PCA) and 1250 coliforms/g; (2) an intermediate cluster composed of cod salted in brine containing 50% NaCl, 0.4% MgCl₂, and 49.6% KCl (pH 6.5); and (3) a central cluster, including all the other treatments, which presented the lowest microbiological counts, namely 2.4 log CFU/g on PCA and 20 coliforms/g. Although the batches of the intermediate cluster presented slightly higher total viable and staphylococci counts than the central cluster, the presence of Mg and K ions improved the color of the salted product. In the assayed concentrations, CaCl₂, MgCl₂, and KCl can be used in the brining of cod without adversely affecting the microbiological and sensory quality of the salted cod.     

探讨地下卤水净化实现岩盐矿床选择性开采

文章针时目前卤水净化工艺需要投入大量资金建设，并且还不能连续生产等弊端．通过室内岩样净化试验总结，提出了开展卤井试验有关要素及探讨将卤水净化转入地下，实现岩盐矿床选择性开采工艺．     

全卤制碱工艺一次盐水的技术应用

介绍了金桥益海(连云港)氯碱有限公司全卤制碱工艺一次盐水单元的生产工艺,包括陶瓷膜过滤工序、机械蒸汽再压缩(MVR)工序的技术特点,分析了生产运行中发现的问题,并提出了改进措施.     

卤水和硫酸铵制工业氯化铵和无水硫酸钠

母液Ⅱ加卤水和硫酸铵在温度80℃,n(NaCl)/n[(NH4)2SO4)=2.0的条件下反应,再加热浓缩至物料密度为1.30g/cm3～1.35g/cm3后析出Na2SO4晶体,经分离、洗涤、干燥后得无水硫酸钠产品.分离硫酸钠后的母液Ⅰ冷至30℃～25℃,析出NH4C1晶体,经分离、NH4Cl溶液洗涤、干燥后得氯化铵产品.分离NH4Cl后的母液Ⅱ在补充卤水和硫酸铵后开始新一轮循环.