SQF—200型氢气发生器电解槽的维修技术

1 前言 SQF-200型氢气发生器为一配合气相色谱仪和其它仪器应用的气源装置,主要由稳流电源和电解槽两大部分组成。其中电解槽是仪器的核心部分。维修中发现,电解槽出现故障次数较多。本文将介绍我们维修电解槽的方法和体会,供读者参考。 2 电解楷常见故障及产生的原因①液道堵塞和电解液发生泡沫。其原因是电解槽工作时间长(数月以上),槽内沉积物     

对氢气洗塔冷却水回收利用的探讨

我厂为年产3万t隔膜法烧碱企业,电解槽出来的氢气先经氢气—盐水换热器对氢气降温处理,再经氢气洗涤塔用一次水洗涤后冷却水排入地沟,浪费了大量的水资源,而我厂的总循环水系统水量     

氢气站氢气回流量探讨

离子膜法制烧碱和隔膜法制烧碱生产工艺中的调节回路很多,氢气回流调节是诸多调节回路中的关键控制点。在生产过程中,电解系统要求氢气压力必须保持稳定,为了解决这一问题,一般通过设置氢气站氢气回流调节装置才能够保证电解系统安全稳定运行。但如果回流量不够,将给生产操作带来极为不利的因素。     

氯气氢气压力自动调节系统的改进

1 概述我厂2万吨/年金属阳极电解槽,产生的湿氯湿氢压力必须稳定,氢气压力要求控制在0～十49Pa,氯气压力要求控制在-98Pa～-49Pa。氯气压力不稳的主要危害是:①氯纯度易波动;②影响电解过程的平衡;③易引起氯中含氢增高;④易引起氯气外溢影响环境。氢气压力不稳的主要危害是:①易造成     

制氢装置氢气纯度的控制

分析了氢气中杂质的来源,影响氢气纯度的一些主要因素,以及如何从各方面去控制氢气纯度。指出,注意监测氢气纯度的变化趋势,并采取严格控制碱液密度等参数,提高装置负荷、定期清洗电解槽等措施可控制氢气纯度在规定范围。     

氢气支管着火原因

分析了湖北双环科技股份有限公司氯化工厂电解厂房内氢气支管着火事故，认为该次事故是由电解槽断电产生的电火花引起的。     

氢气洗涤塔运行中存在的问题及改进措施

介绍了氢气处理工艺流程。针对原氢气处理工艺过程中过滤器常堵塞的问题,从2方面改进了氢气洗涤塔工艺:①控制源头,改变水质;②对喷淋嘴进行钝化处理。改造后,解决了氢气洗涤塔在运行中出现的结垢、喷嘴堵塞、洗涤不充分等问题,同时降低了检维修费用,提高了生产系统的稳定性。     

离子膜电解放空氢气并入系统改造小结

将离子膜电解氢气系统进行改进,使原来放空的氢气并入系统,减少放空量,并可保证氯氢压差稳定。     

氢气喷淋冷却塔中湿氢气冷凝水的综合利用

在烧碱生产过程中,从电解槽阴极室出来的氢气,其温度稍低于电解槽槽温。约在80～90℃。被水蒸气所饱和的湿氢气,带有少量的盐及碱雾。湿氢气所带的饱和水蒸气量与温度有关,温度越高,氢气所带的水蒸气量越大。高温下的湿氢气体积大、含水多,带有碱雾、盐雾,不便于压缩、输送。我公司烧碱生产能力1．5万t／a,原氢气系统工艺如图1所示。     

氢气处理工艺改造总结

对氢气处理新旧工艺进行了对比,分析了旧工艺设备存在的问题,阐述了新工艺设备体现的优势:基本消除了洗涤塔结垢现象;节水、节电效果显著;出分配台氢气温度高和氢气带水多的问题得到了解决;氢气压缩机内不再结垢。     

Hydrogen Spillover

Supported metal catalysts find wide industrial application. Of the many reasons for their use, none is more important than the very high degree of dispersion of the metal which can be achieved with comparative ease. Much effort has been devoted in recent years to the physical characterization of such catalysts, but it has recently been recognized that the functions of the metal and of the support cannot be readily separated. It has, of course, long been known that the support plays a vital role in dual ._ function catalysts: the phenomenon of hydrogen spillover is a further symptom of the close interaction between metal and support. This article reviews its detection and utilization.     

Hydrogen Spillover

Supported metal catalysts find wide industrial application. Of the many reasons for their use, none is more important than the very high degree of dispersion of the metal which can be achieved with comparative ease. Much effort has been devoted in recent years to the physical characterization of such catalysts, but it has recently been recognized that the functions of the metal and of the support cannot be readily separated. It has, of course, long been known that the support plays a vital role in dual ._ function catalysts: the phenomenon of hydrogen spillover is a further symptom of the close interaction between metal and support. This article reviews its detection and utilization.     

Hydrogen Evolution and Hydrogen Oxidation on Palladium Bismuth Alloys

Thin film alloys of PdBi have been synthesised using a high throughput physical vapour deposition method to produce compositional gradients of PdBi alloys. XPS indicates that for the non-equilibrated thin films, the surface composition is the same as the bulk, and core level shifts reflect the inter-metallic interaction between the component metals. Hydrogen absorption is hindered in the PdBi alloys, and at a composition of 70 at.% bismuth, the ??Bi₂Pd bulk alloy phase is identified in XRD. This phase exhibits a maximum in the hydrogen evolution reaction (HER) and hydrogen oxidation reaction (HOR) electrocatalytic activity. The increased activity of the alloy can be understood in terms of the Pd d-band density of states, and a concomitant increase in the binding energy of hydrogen. There is a strong correlation between the HER and HOR activity as a function of composition across the complete range of alloys. The potential of using the ??Bi₂Pd bulk inter-metallic phase at the anode of PEM fuel cells is briefly discussed.     

氯化氢气体中氟化氢脱除技术的研究

从吸收原理出发,经实验室及现场试验找到了由2种化合物组成的用于脱除氯化氢气体中氟化氢的湿法脱氟剂,确定了湿法脱氟工艺流程.现场脱氟试验表明,在常温下经该脱氟剂一级湿法脱氟后制取的盐酸中氟的质量浓度可以降至15 mg/L以下,脱氟率大于99.9％;脱氟得到的氟化产物经过滤、洗涤、干燥后产品主要成分符合相关要求,说明所开发...     

粗氢聚结器在制氢装置中的应用

通过引进由北京华友欣达石化科技有限公司引进美国滨特尔公司技术研发生产的型号为FF04G02粗氢聚结器,成功地排除了因粗氢分液罐V106分水效果不好而给制氢装置工艺操作和设备运行带来的安全隐患,同时也为装置的长周期运行和全厂的生产平衡提供了可靠地保障。     

紫外光分解硫化氢制氢的研究

以10W低压汞灯（特征谱线波长,λ=253.7nm,简称UVC）作为光源,硫化钠的水溶液作为反应介质,进行了UVC直接分解硫化氢制氢反应（简称UVC-H2S-H2）的研究.考察了反应介质中硫的存在形式、硫化钠的浓度、反应介质pH值以及连续通入硫化氢的流量等反应条件对UVC-H2S-H2的影响.实验结果表明,UVC可以在无催化剂条件下直接分解硫化氢制氢.当以0.6mol/L硫化钠水溶液为反应介质,以25mL/h流量连续向反应介质中通入硫化氢时,UVC-H2S-H2产氢速率可达3.0mL/W.h.