本文選題：精制劑 + 經(jīng)濟運行　； 參考：《蘭州大學》2015年碩士論文

【摘要】：金川集團公司氯堿產(chǎn)能(包括在建)已達到500kt/a。由于在鹽水精制過程中需添加大量的碳酸鈉、氫氧化鈉等精制劑用于去除鹽水中的泥沙、Ca2+、Mg2+等雜質(zhì),精制劑消耗占離子膜氯堿系統(tǒng)可控成本的20%,開展離子膜燒堿鹽水精制經(jīng)濟性運行研究具有重要的現(xiàn)實意義。近年來公司不斷加大科研攻關力度,致力于離子膜燒堿鹽水精制經(jīng)濟性運行的研究和應用,在降低精制劑消耗方面做了大量的工作。離子膜燒堿系統(tǒng)鹽水質(zhì)量對電解電流效率及離子膜壽命影響較大,精制劑投加量制約精制質(zhì)量的提升效果。受下游配套耗氯裝置停產(chǎn)等因素影響,化工廠離子膜燒堿系統(tǒng)近年來低負荷運行,噸堿平均變動成本達2365.3元／噸。鹽水精制過程中碳酸鈉、氫氧化鈉、鹽酸及純水消耗量大,導致鹽水精制成本高于同行業(yè)整體水平。國內(nèi)眾多離子膜制堿企業(yè)長期致力于協(xié)調(diào)離子膜燒堿系統(tǒng)鹽水質(zhì)量與精制劑消耗量的矛盾,在保證鹽水質(zhì)量可靠的前提下,解決前反應槽效率低、后反應槽碳酸鈉混合不均、樹脂塔定量設計、因堿性廢水回用造成的鹽水指標波動等制約精制劑降耗的關鍵技術難題。該項目立足于降低精制劑消耗,以技術創(chuàng)新為手段,通過大量的理論研究,經(jīng)過對各點精制劑流量、鹽水指標等反復跟蹤、不斷地模擬試驗,解決了上述問題,建立了一套完整的針對不同生產(chǎn)負荷下鹽水精制匹配化操作控制技術。并將其應用于離子膜燒堿系統(tǒng),顯著提升了精制鹽水的工藝技術指標,降低了系統(tǒng)物料消耗,實現(xiàn)了鹽水精制裝置的經(jīng)濟、穩(wěn)定運行。經(jīng)濟效益、社會效益顯著,對氯堿行業(yè)的經(jīng)濟運行將起到積極的示范和推廣作用。
[Abstract]:Jinchuan Group chlor-alkali production capacity (including construction) has reached 500 kt / a. In the process of brine purification, a large amount of sodium carbonate, sodium hydroxide and other refined preparations are used to remove impurities such as Ca 2 + Ca 2 + mg 2 in brine. The consumption of refined preparation accounts for 20% of the controllable cost of ionic membrane chlor-alkali system, so it is of great practical significance to study the economic operation of ionic membrane caustic soda refining. In recent years, the company has been increasing its scientific research, devoting itself to the research and application of ion membrane caustic soda refining economic operation, and has done a lot of work in reducing the consumption of refined preparation. The quality of salt water in ionic membrane caustic soda system has great influence on electrolytic current efficiency and ion membrane life. The ion membrane caustic soda system in chemical plant has been operated at low load in recent years, and the average variation cost of ton alkali is 2365.3 yuan per ton. The consumption of sodium carbonate, sodium hydroxide, hydrochloric acid and pure water in brine refining process is high, which leads to the higher cost of brine refining than the whole industry. For a long time, many domestic ion-exchange membrane alkali-making enterprises are committed to coordinate the contradiction between salt water quality and the consumption of refined preparation in ionic membrane caustic soda system. On the premise of ensuring the quality and reliability of salt water, the low efficiency of pre-reaction tank and the uneven mixing of sodium carbonate in post-reaction tank are solved. Quantitative design of resin column is a key technical problem for reducing the consumption of refined preparation, such as the fluctuation of salt water index caused by the reuse of alkaline wastewater. This project is based on reducing the consumption of refined preparation, by means of technological innovation, through a large number of theoretical studies, through repeated tracking of the flow rate of each point refined preparation, salt water index, etc., the above problems have been solved through continuous simulation tests. A complete set of operation control technology for brine refining matching under different production loads was established. It has been applied to ionic membrane caustic soda system, which has greatly improved the technological index of refined brine, reduced the consumption of system materials, and realized the economical and stable operation of the brine refining unit. Economic benefits and social benefits are remarkable, which will play an active role in demonstration and promotion of the economic operation of chlor-alkali industry.
【學位授予單位】：蘭州大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ114.261

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