共查询到20条相似文献,搜索用时 93 毫秒
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介绍了低温甲醇洗系统运行期间净化气中硫化氢超标的原因,并对净化气中硫化氢超标的提出了对策和措施。 相似文献
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溶解乙炔气含有磷化氢、硫化氢等杂质,如果不除去会对生产和使用产生很大影响。论述了溶解乙炔的净化方法,重点阐述了氯水法净化工艺,并对净化工艺的选择提出了意见。 相似文献
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城市下水道硫化氢造成的危害日益严重,常见的硫化氢治理药剂包括氧气、过氧化氢、次氯酸钠、三氯化铁和硫化亚铁等,但治理成本较高。近年来通过化学和生物处理方法治理硫化氢的研究取得了一些进展。介绍城市下水道系统中硫化氢防治技术方面的研究现状,微生物燃料电池和噬菌体将在今后城市下水道硫化氢治理中发挥重要的作用。 相似文献
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本文通过介绍几种广泛应用的脱除硫化氢的方法及其利弊,提出了真空碳酸盐法脱除硫化氢的优越性。并且通过研究真空碳酸盐法脱除硫化氢的机理,提出了目前开发真空碳酸盐法脱硫技术还需解决的主要技术难题和真空碳酸盐法在气体净化领域的应用前景。 相似文献
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介绍了较为先进有效的几种脱除硫化氢方法的机理、应用现状以及每种方法的特点,对吸收法、气-固吸附法、氧化法、分解法、微生物法分类介绍,最后总结出不同情况下的硫化氢可采用的不同类型的脱除方法。 相似文献
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针对配注污水中因硫化氢气体的存在导致所配聚合物溶液粘度损失严重,其含硫化氢污水取样后室内很难存储问题,开展室内合成硫化氢,建立室内研究硫化氢对聚合物粘度影响实验方法。该研究方法为:盐酸与硫化钠反应后生成一定量的硫化氢,以氮气为载气通入聚合物溶液中,考察硫化氢对聚合物溶液粘度的影响。通过控制载气流量、吹脱温度、酸滴加速度确定硫化氢的最佳生成条件,从而确定硫化氢对聚合物粘度影响的最佳室内模拟条件。通过实验研究最终确定反应温度为80℃、氮气流量为0.1L/min、盐酸在5min内滴加完成,在该反应条件下可以准确评价硫化氢对聚合物溶液粘度影响。 相似文献
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对净化车间氨-硫化氢法(AS)煤气脱硫工艺中塔后煤气含H2S偏高的问题进行了分析,通过采用洗氨塔碱洗段二次洗涤煤气、提高洗涤贫液中NH3/H2S质量比、控制吸收操作温度、提高洗涤贫液流量等措施,使塔后煤气含H2S的指标达到了规定的要求。 相似文献
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Éva Molnár Tamás Varga Dóra Rippel-Pethő Róbert Bocsi Janka Bobek Géza Horváth 《Chemical Engineering Communications》2017,204(8):974-981
Scrubbing of hydrocarbon-based gases such as natural gas or biogas is essential prior to its use. These gas mixtures when contaminated with hydrogen sulfide cause safety, environmental, and corrosion problems in pipelines. There are several methods of reducing the content of hydrogen sulfide in sour gases, but few of these are selective as well. Selectivity is important to avoid unnecessary chemical usage. Chemisorption in sodium hydroxide solution by applying a special spray technique appears to be an efficient and selective method for hydrogen sulfide removal. This study aims to determine the characteristic of system and thereby facilitating the design of gas-cleaning parameters. The studied parameters include the contact time, concentration of sodium hydroxide, absorbent volumetric flow rate, and gas composition. Model gas mixtures of hydrogen sulfide, carbon dioxide, and nitrogen were used for experiments. To define the optimal experiment setup, the Box–Behnken design (BBD) method was applied. Based on the method, the number and the condition of necessary absorption experiments were constructed. To rank the operating parameters of the absorption process from the point of view of which effect is more significant on the scrubbing performance, statistical analysis of variance (ANOVA) was done. The analysis shows contact time and concentration of sodium hydroxide as the two most influential factors in the absorption process. Carbon dioxide content of sour gas as influencing factor was examined for efficiency and order of priority parameters of process. An extended model has been created to support the optimization of operating conditions in the investigated removal system. 相似文献