颇尔膜过滤器在离子膜法制碱一次盐水系统的应用研究

发布时间：2018-08-14 12:06

【摘要】： 随着氯碱行业的发展,离子膜法电解制碱技术在氯碱行业中的应用越来越得到重视,本文结合我国目前离子膜制碱生产中一次盐水制备的现况和扬农化工集团的生产实际,对颇尔膜过滤器在一次盐水中的应用进行了研究。首先结合扬农集团的一次盐水工艺过程,对由于原料引入的杂质进行讨论与研究,并通过数据分析,提出在一次盐水中要重点控制的杂质指标。其次在对离子膜法电解一次盐水系统进行颇尔膜过滤器的应用研究,生产原料采用精制盐及卤盐水,重点是对于粗盐水的工艺进行了试验。在保证过滤器过滤通量及再生性能的基础上,设计了对Ca~(2+)、Mg~(2+)和SO_4~(2-)分别进行处理的三种试验方案,对于不同杂质在精制过程中的固体颗粒的过滤特性进行了分析对比,确定了粗盐水工艺并进行了改进。通过试验对颇尔膜过滤器的微滤操作条件的进行了研究,重点是对不同过滤压力下过滤通量的影响。对过滤操作参数进行了优选,确定了最佳操作条件为过滤压力为0.03MPa和过滤通量为1.2 m.h~(-1).25m.h~(-1),为装置的工业化设计提供了依据。最后根据试验结论,对一次盐水系统的物料平衡及主要设备的参数进行了计算与设计,并进行了装置进行了安装及调试。根据试验方案,确定了颇尔膜表面过滤器的操作程序、操作法及相关的控制指标。在工业化装置的调试过程中,针对出现的不正常情况进行了分析与研究,重点是针对于颇尔膜表面过滤器滤芯的断裂和鼓泡,通过强度试验检测及扫描电子显微镜分析,确定了滤芯损坏的原因,并加以改进。在一次盐水的工艺中,解决了盐水中的有机物、游离氯等对颇尔膜过滤器的污染问题、滤芯的断裂及起泡等问题,在国内首次使颇尔膜分离技术在离子膜一次盐水精制工艺中获得成功应用。从而简化了传统工艺流程,一次盐水质量得到了显著提高。从而保障了离子膜电解装置的稳定、高效生产。
[Abstract]:With the development of chlor-alkali industry, more and more attention has been paid to the application of ionic membrane electrolytic alkali production technology in chlor-alkali industry. This paper combines the present situation of primary brine preparation in the production of ionic membrane alkali in China and the production practice of Yangnong Chemical Group. The application of Pol membrane filter in primary brine was studied. The impurity introduced by raw materials is discussed and studied in the first brine process of Yangnong Group, and through data analysis, the impurity index which should be controlled in primary brine is put forward. Secondly, the application of Pol membrane filter in ion membrane electrolytic primary brine system was studied. Refined salt and halogen brine were used as raw materials, and the process of crude salt water was tested. On the basis of the filtration flux and regeneration performance of the filter, three experimental schemes were designed to treat Ca ~ (2) mg ~ (2) and so _ 4 ~ (2-) respectively. The filtration characteristics of solid particles with different impurities in the refining process were analyzed and compared. The crude salt water process was determined and improved. The operation conditions of Pol membrane filter were studied by experiments, and the influence of filtration flux at different filtration pressure was emphasized. The optimal operation parameters were selected, and the optimal operating conditions were determined as follows: filtration pressure was 0.03MPa and filtration flux was 1.2m.h-1. 25m.h-1, which provided the basis for the industrialized design of the plant. Finally, according to the experimental results, the material balance of the primary brine system and the parameters of the main equipment are calculated and designed, and the equipment is installed and debugged. According to the test scheme, the operation procedure, operation method and related control index of Pol membrane surface filter are determined. During the debugging process of the industrial plant, the abnormal situation is analyzed and studied. The emphasis is on the fracture and bubbling of the filter core of the Pol membrane surface filter, the strength test and the scanning electron microscope analysis. The cause of the damage of the filter element is determined and improved. In the process of primary brine, the pollution of organic matter in brine, free chlorine and so on to the membrane filter, the breakage and foaming of filter core, etc., have been solved. For the first time in China, the Pol membrane separation technology has been successfully applied in the process of ion membrane primary brine purification. Thus the traditional process is simplified and the quality of primary brine is improved significantly. Thus ensuring the stability of ion membrane electrolysis device, efficient production.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2010
【分类号】：TQ114.2

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