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洗氨水的水质问题,直接影响着洗氨塔的洗氨效果。严重时影响到煤气指标,影响到生产的正常运行。本文介绍采用软水洗氨后,可解决洗氨中存在的问题。一、旧的洗氨方法及存在的问题1.工艺流程氨水系统中的剩余氨水,经蒸氨塔蒸馏 相似文献
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高浓缩倍数运行是循环水系统的发展趋势,阻垢控制已成为高浓缩倍数运行的关键点和难点,通过采用量子技术产品——量子管通环,以循环水作载体进行量子管通环存储的超微振动波的传输,提高循环水的活性,增加钙容忍能力,促进碳酸钙晶体的晶格畸变,进而提升循环水系统的阻垢效果,为循环水处理提供了一条新的技术思路和途径。 相似文献
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针对公司循环水系统使用药剂法(5年)存在的一些问题(如设备腐蚀结垢较严重,抗药性等);首次将一种新型物理阻垢技术一量子管通环应用于公司循环水系统的结垢、防腐、杀菌治理.经过1年的运行效果表明:量子管通环能在结垢型水质的情况下,对设备防腐结垢起到了很好的除垢及阻垢效果,且有节水效果,但杀菌效果一般,需辅助添加氯水. 相似文献
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煤气吹脱解吸法脱除废氨水中氨氮的新技术 总被引:4,自引:0,他引:4
介绍了煤气吹脱解吸法与硫铵和AAO生化法联运脱除废氨水中氨氮的新技术。该技术与直接蒸汽蒸氨法相比,具有脱除率高、成本低、工艺简单等优点,并能减轻生化处理的负荷。氨氮脱除率达到96%以上,实现了绿色环保生产。 相似文献
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介绍了蒸氨系统生产现状,针对现行工艺存在塔阻、焦油、碱液浓度波动大以及氨水分缩器温度无法自动控制等问题,通过采取拆除进料层塔板泡罩,加高剩余氨水槽的抽出管道,加碱混合器由螺旋式改为隔板式,增加加碱备用管道,实现温度自动控制等措施,取得了良好效果。 相似文献
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过硫酸钠合成过程的脱氨速率研究 总被引:1,自引:0,他引:1
建立了对硫酸钠合成过程的脱氨速率数学模型,并通过计算机模拟求得了该模型的数值解,从而得到了反应体系中、液相中氨 时间的关系以及脱氨速率和脱气速率随时间的变化规律。研究表明,系统的操作温度和压力等参数对脱氨速率有重要影响。通过一个容积为25L的反应器及其辅助设备组成的实验系统实测显示,所得数值解与实验值吻合很好,理论模型具有较高准确性。目前,该研究结论已被用于工业设计之中。 相似文献
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化肥厂原料液氨带油进入尿素系统,尿素设备的换热段高温部位产生一定量的缩二脲垢,导致换热效率和产品产量下降。通过化学清洗彻底清除气提塔内的油垢、污垢等,使其安全、高效生产运行。 相似文献
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介绍大型二氧化碳汽提法和氨汽提法尿素装置的工艺特点.针对各种工艺特点,综述我国20世纪70年代后陆续引进的大型尿素装置节能技术改造的情况.提出大型尿素装置进一步进行技术改造的努力方向和建议. 相似文献
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针对氨汽提法尿素装置中压甲铵冷凝器管侧冷却水结垢的问题,对2套解决方案进行了比较,选用蒸汽冷凝液密闭循环冷却方案对循环冷却水系统进行了工艺优化设计. 相似文献
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In this work modelling and experimental validation of an integrated process for the removal of carbon dioxide from ammonia solutions - the so called decarbonisation - is presented. In this process, carbon dioxide and small amount of ammonia is stripped out from the solution at ambient pressure in a packed column. Recovery of the stripped ammonia can be reached by combining absorption of ammonia and condensation of stripping steam. The integration of stripping, absorption and direct-contact condensation (DCC) can be achieved in one compact unit in which stripping takes place in the lower part of the packed column, and the DCC and ammonia absorption in its upper part. This unit has been modelled in a rigorous way considering heat and mass transfer as well as reaction rates in multicomponent reactive stripping, absorption and direct-contact condensation in packed columns (Ma?kowiak et al., 2009). Extensive experimental investigations in a pilot scale packed column with diameters of 0.15 and 0.32 m have been performed for both, the stripping and for DCC. Relevant operation parameters as well as column dimensions were varied during the experiments in order to investigate their influence on the selectivity of the decarbonisation and to achieve a broad data base for the validation. Experimental validation of the two sub-processes and the entire decarbonisation shows good agreement between calculated and experimental values. Based on the validated model a successful optimisation of the decarbonisation process in industrial scale has been performed, leading to increased carbon dioxide removal and reduction of ammonia losses. 相似文献
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The chemistry of the formation of methane in hydrogasification of such aromatics with heteroatoms as diphenylenoxide, diphenylensulphide, quinoline, phenol, 1-naphthol and benzole acid was studied using a flow tube. Temperatures varied between 700 and 1000 °C. Gases and benzene were analysed by on-line gas chromatography, the tar products being analysed by mass spectrometry. Heterocyclic-bound nitrogen and oxygen directly attached to the aromatic system both facilitate ring cleavage, whereby nitrogen is eliminated as ammonia and oxygen as carbon monoxide. For phenolic hydroxyl groups the temperature of dehydroxylation must exceed 800 °C using rapid heating. These processes result in high methane yields. Heterocyclic-bound sulphur does not effect ring cleavage and methane formation. 相似文献