HPF法脱硫废液中二种盐的收率及纯度影响因素的研究
发布时间：2018-10-08 16:23
【摘要】：HPF法脱硫技术因其脱硫效率高、占地省、操作简单、运行费用低等特点已经广泛应用于各大钢铁厂及焦化厂对煤气进行脱硫脱氰处理。但HPF法产生一定量的脱硫废液,这些脱硫废液的重新回用技术日趋发展并日益受到重视。本论文在综述了常见脱硫方法及脱硫废液处理方法的基础上,并主要介绍分步结晶法提取HPF脱硫废液中的硫氰酸铵和硫代硫酸铵等盐的技术方法,并分析影响该法产品纯度及收率的因素,通过控制和调节这些因素以提高相应的产品纯度及收率。本论文对相关影响因素的研究过程中,主要采用控制单因子变量法进行研究。通过查阅相关资料及试验研究,发现影响硫代硫酸铵和硫氰酸铵两种盐纯度及收率的主要因素为结晶温度、搅拌速度、溶液中杂质种类及含量、溶液的过饱和度、溶液自身的密度、溶液自身的粘度、结晶釜自身结构、结晶体系空间。但是由于实验条件及时间的限制,并没有对所有的因素都进行了探究,本论文只对温度、搅拌速度、杂质含量等因素进行了研究。通过反复试验,总结出以下结论:杂质的量保持在15~20NTU范围内为佳;硫代硫酸铵的最佳结晶温度范围为45~50℃;搅拌速率应该控制在300~400r/min范围较为合适,这样产品纯度和收率都较高,同时还能够在一定程度上提高结晶速率,进而提高生产能力。
[Abstract]:Because of its high desulfurization efficiency, low operation cost and low operation cost, HPF desulfurization technology has been widely used in coal gas desulphurization and decyanation treatment in large steel plants and coking plants. However, HPF process produces a certain amount of desulfurization waste liquid, and the reuse technology of these desulphurization waste liquid is increasingly developed and paid more and more attention. On the basis of summarizing the common desulphurization methods and the treatment methods of desulphurization waste liquor, this paper mainly introduces the technical methods of extracting ammonium thiocyanate and ammonium thiosulfate from HPF desulphurization waste liquor by step crystallization method. The factors affecting the purity and yield of the product were analyzed, and the purity and yield of the product were improved by controlling and adjusting these factors. In this paper, the control single variable method is used to study the related factors. The main factors affecting the purity and yield of ammonium thiosulfate and ammonium thiocyanate are crystallization temperature, stirring speed, the kinds and contents of impurities in the solution, and the supersaturation of the solution. The density of the solution itself, the viscosity of the solution itself, the structure of the crystallization kettle and the space of the crystallization system. However, due to the limitation of experimental conditions and time, not all the factors have been explored. In this paper, only temperature, stirring speed, impurity content and other factors have been studied. Through repeated experiments, the following conclusions are concluded: the best content of impurity is kept in the range of 15~20NTU, the optimum crystallization temperature of ammonium thiosulfate is 45 鈩，
本文编号：2257443
[Abstract]:Because of its high desulfurization efficiency, low operation cost and low operation cost, HPF desulfurization technology has been widely used in coal gas desulphurization and decyanation treatment in large steel plants and coking plants. However, HPF process produces a certain amount of desulfurization waste liquid, and the reuse technology of these desulphurization waste liquid is increasingly developed and paid more and more attention. On the basis of summarizing the common desulphurization methods and the treatment methods of desulphurization waste liquor, this paper mainly introduces the technical methods of extracting ammonium thiocyanate and ammonium thiosulfate from HPF desulphurization waste liquor by step crystallization method. The factors affecting the purity and yield of the product were analyzed, and the purity and yield of the product were improved by controlling and adjusting these factors. In this paper, the control single variable method is used to study the related factors. The main factors affecting the purity and yield of ammonium thiosulfate and ammonium thiocyanate are crystallization temperature, stirring speed, the kinds and contents of impurities in the solution, and the supersaturation of the solution. The density of the solution itself, the viscosity of the solution itself, the structure of the crystallization kettle and the space of the crystallization system. However, due to the limitation of experimental conditions and time, not all the factors have been explored. In this paper, only temperature, stirring speed, impurity content and other factors have been studied. Through repeated experiments, the following conclusions are concluded: the best content of impurity is kept in the range of 15~20NTU, the optimum crystallization temperature of ammonium thiosulfate is 45 鈩，
本文编号：2257443
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