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对中高压锅炉给水除氧剂的除氧机及应用作了介绍。特别指出由于联氨(肼)具有毒性和致癌性,国外已大部分被型新型高效无毒除氧剂取代。 相似文献
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文章分析了现有几种常用的锅炉给水除氧技术,如热力除氧,亚硫酸钠除氧等,并指出这些方法各自不同的适用范围。在此基础上,找出它们优缺点,提出了锅炉给水除氧方法选用的建议性意。 相似文献
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锅炉给水除氧是保证锅炉安全经济运行的关键。传统的物理除氧及化学除氧方法具有较高的成本以及复杂过程,且化学除氧过程中会用到化学药剂,可能对锅炉水造成污染。通过电化学除氧方法能够较好地解决这些问题,提高锅炉给水除氧的效率和经济性。对锅炉给水电化学除氧技术的应用进行了讨论。 相似文献
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从几种常用的锅炉给水除氧技术入手,分析并指出这些方法各自不同的适用范围,及其优缺点,提出了锅炉水处理除氧方法建设性选用意见。 相似文献
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介绍锅炉给水中溶解的气体对设备、管道的腐蚀原因和危害,叙述几种除氧方法的优缺点以及选择解吸除氧方法后取得的明显效果。 相似文献
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锅炉给水除氧系统节能改造白斌杰(广州氮肥厂广州市510661)锅炉给水(软水)中溶有多种气体,其中对热力设备危害最大的是氧气。除去锅炉给水中的氧气是保护热力系统中的设备不受腐蚀的有效措施。根据亨利定律,氧在水中的溶解度为:__P’G=KM(ma/L)... 相似文献
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在分析国内锅炉水除氧工艺与设备的基础上,采用二次催化工艺,研制出一种新型锅炉水催化除氧设备。该设备以电解钴作为一次催化剂,以多孔稀土作为吸附剂,富集钴离子作为二次催化剂,现场试验表明,经二次催化后,化学除氧反应速度大大提高,还原剂仅需稍大于理论用量,即可使出水残余氧的质量浓度小于0.05mg/L,并可使除氧反应的温度降为常温。 相似文献
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New polymers were used as catalysts for the removal of dissolved oxygen in boiler water. These polymers, based upon hydroquinone‐quinone redox system, were prepared by polymerization of methyl 4‐(2,5‐dimethoxybenzyl)cinnamate and copolymerization of this monomer with 4‐(4′‐vinylphenethyl)‐1,10‐phenanthroline. The resulting product was used to synthesize polymers containing transition metal ions. Nuclear magnetic resonance, infrared spectroscopy, and elemental analysis were achieved to characterize monomers and/or electron‐transfer polymers. These polymers were used for the removal of oxygen from water. It was shown that the oxygen content was reduced to less than 0.1 mg L?1 in ~ 70 s. Based on the obtained results, the redox capacity of two polymers were determined. It was established that the poly‐4‐(2,5‐dihydroxybenzyl)cinnamic acid reached a redox capacity of 69.7 mg of O2 per gram of polymer. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 相似文献
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Wenxin SHI Chongwei CUI Liye ZHAO Shuili YU Xia YUN 《Frontiers of Chemical Engineering in China》2009,3(1):107-111
The removal of dissolved oxygen (DO) from water was studied experimentally in a Pd-resin base catalyst reactor using purified
hydrogen gas as a reducing agent. The effects of various operating conditions, such as hydrogen and water flow rates, height
of the catalytic resin bed, temperature, pH value and run time, on the removal of DO, had been studied extensively. The results
shows that DO could be removed by the reactor from ppm to ppb levels at ambient temperature. Increases of temperature, H2 gas rate and the height of the catalytic resin were helpful to improve the DO removal rate. The change of pH value from 4
to 12 resulted in no effect on DO removal. Reaction time was the key factor to control the DO removal efficiency. Only when
the reaction time was longer than 2.3 minutes under the experimental conditions, could a very low DO level be achieved. 相似文献
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近年来随着发电机组供热量不断增加,机组水汽品质恶化,超过GB/T 12145—2008规定的标准值。介绍了在供热机组锅炉补给水中使用的脱气膜装置的脱气膜结构及安装应用情况,为大容量供热机组解决汽水品质问题提供解决方案。 相似文献
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水泥工业余热电厂的锅炉给水除氧非常关键,目前常用化学除氧和真空除氧,而压力式热力除氧应用不多。文章以 5 000 t/d熟料生产线的余热发电系统为例,介绍了锅炉给水热力除氧系统的流程和设计要点,并重点分析了采用热力除氧余热发电系统的特点和优势。该系统除氧效果良好,且能够实现热能的梯级利用,能有效提高发电系统的热效率和火用效率。 相似文献