【摘要】： 隨著氯堿行業(yè)的發(fā)展,離子膜法電解制堿技術在氯堿行業(yè)中的應用越來越得到重視,本文結合我國目前離子膜制堿生產中一次鹽水制備的現況和揚農化工集團的生產實際,對頗爾膜過濾器在一次鹽水中的應用進行了研究。 首先結合揚農集團的一次鹽水工藝過程,對由于原料引入的雜質進行討論與研究,并通過數據分析,提出在一次鹽水中要重點控制的雜質指標。 其次在對離子膜法電解一次鹽水系統(tǒng)進行頗爾膜過濾器的應用研究,生產原料采用精制鹽及鹵鹽水,重點是對于粗鹽水的工藝進行了試驗。在保證過濾器過濾通量及再生性能的基礎上,設計了對Ca~(2+)、Mg~(2+)和SO_4~(2-)分別進行處理的三種試驗方案,對于不同雜質在精制過程中的固體顆粒的過濾特性進行了分析對比,確定了粗鹽水工藝并進行了改進。通過試驗對頗爾膜過濾器的微濾操作條件的進行了研究,重點是對不同過濾壓力下過濾通量的影響。對過濾操作參數進行了優(yōu)選,確定了最佳操作條件為過濾壓力為0.03MPa和過濾通量為1.2 m.h~(-1).25m.h~(-1),為裝置的工業(yè)化設計提供了依據。 最后根據試驗結論,對一次鹽水系統(tǒng)的物料平衡及主要設備的參數進行了計算與設計,并進行了裝置進行了安裝及調試。根據試驗方案,確定了頗爾膜表面過濾器的操作程序、操作法及相關的控制指標。在工業(yè)化裝置的調試過程中,針對出現的不正常情況進行了分析與研究,重點是針對于頗爾膜表面過濾器濾芯的斷裂和鼓泡,通過強度試驗檢測及掃描電子顯微鏡分析,確定了濾芯損壞的原因,并加以改進。在一次鹽水的工藝中,解決了鹽水中的有機物、游離氯等對頗爾膜過濾器的污染問題、濾芯的斷裂及起泡等問題,在國內首次使頗爾膜分離技術在離子膜一次鹽水精制工藝中獲得成功應用。從而簡化了傳統(tǒng)工藝流程,一次鹽水質量得到了顯著提高。從而保障了離子膜電解裝置的穩(wěn)定、高效生產。
[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.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2010
【分類號】：TQ114.2

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