【摘要】：隨著科技與社會的發(fā)展，水資源短缺成為全球矚目的熱點問題之一。反滲透方法因其設(shè)備投資省、能量消耗低、建造周期短等優(yōu)點，正快速成為當(dāng)今應(yīng)用最廣泛的海水淡化方法。反滲透系統(tǒng)的水質(zhì)安全受到預(yù)處理和膜污染等多方面的影響，通過故障診斷能及時發(fā)現(xiàn)問題所在，對保證系統(tǒng)安全、高效的運行具有重要意義。目前全球各地紛紛建立了大規(guī)模甚至是超大規(guī)模的反滲透海水淡化工程，，研究工作的任務(wù)旨在面向超大規(guī)模反滲透海水淡化工程，研究故障診斷的方法，并在此基礎(chǔ)上初步建立專家系統(tǒng)。研究工作內(nèi)容如下： 1.通過閱讀大量相關(guān)文獻(xiàn)，分析了目前國內(nèi)外反滲透海水淡化的發(fā)展趨勢，在此基礎(chǔ)上對故障診斷方法和專家系統(tǒng)技術(shù)進(jìn)行了概述，并將反滲透工程與上述方法和技術(shù)結(jié)合的研究現(xiàn)狀進(jìn)行了分析，闡述了本研究工作的意義。 2.以舟山六橫島日產(chǎn)10萬噸級海水淡化工程為對象，在了解系統(tǒng)工作原理、系統(tǒng)架構(gòu)以及工藝流程的基礎(chǔ)上，對反滲透系統(tǒng)膜組件典型故障進(jìn)行了深入研究，為故障診斷提供了知識支撐。 3.采用故障樹分析法，將最有研究價值的故障與其他故障間的邏輯聯(lián)系以樹狀結(jié)構(gòu)表示并對故障樹進(jìn)行定性分析，得到故障樹的最小割集、最小徑集并進(jìn)行了結(jié)構(gòu)重要度分析，分析結(jié)果對專家系統(tǒng)推理機的設(shè)計工作打下基礎(chǔ)。 4.應(yīng)用故障樹的最小割集與產(chǎn)生式規(guī)則法，對專家系統(tǒng)的知識庫進(jìn)行設(shè)計。建立了故障事實表，最小割集事件表，故障規(guī)則表，故障條件表和故障維修表為主要內(nèi)容的知識庫；采用基于故障樹知識的推理方式、正反混合的推理方向和深度限制優(yōu)先的搜索策略，建立了推理機�；就瓿闪藢＜蚁到y(tǒng)的設(shè)計。 5.在以上研究工作的基礎(chǔ)上，基于Visual Studio2008和SQL Server2005開發(fā)了反滲透海水淡化故障診斷專家系統(tǒng)軟件。該軟件能協(xié)同反滲透監(jiān)測系統(tǒng)，實時判斷反滲透工作中是否有故障發(fā)生，若有對故障進(jìn)行自動診斷，并給出維修維護(hù)建議。不同操作工況下的模擬數(shù)據(jù)仿真測試和交互式測試分析表明本系統(tǒng)具有良好的故障診斷效果和應(yīng)用價值。
[Abstract]:With the development of science and technology and society, the shortage of water resources has become one of the hot issues in the world. Reverse osmosis (RO) is rapidly becoming the most widely used seawater desalination method because of its advantages such as low equipment investment, low energy consumption and short construction period. The water quality safety of reverse osmosis system is affected by pretreatment and membrane fouling. The fault diagnosis can find the problem in time, which is of great significance to ensure the safety and efficient operation of the system. At present, various parts of the world have set up large-scale or even super-large-scale reverse osmosis desalination projects. The task of the research work is to study the methods of fault diagnosis for the super-large-scale reverse osmosis desalination projects. And on this basis, the preliminary establishment of expert system. The contents of the study are as follows: 1. The development trend of reverse osmosis seawater desalination at home and abroad is analyzed by reading a large number of relevant literatures. On this basis, the fault diagnosis methods and expert system technology are summarized. The research status of reverse osmosis engineering combined with the above methods and technologies is analyzed, and the significance of this research is expounded. 2. On the basis of understanding the working principle, system structure and technological process of the one hundred thousand ton daily seawater desalination project in Liuheng Island, Zhoushan, the typical faults of membrane module in reverse osmosis system are deeply studied. It provides knowledge support for fault diagnosis. 3. By using fault tree analysis, the logical relationship between the most valuable fault and other faults is expressed in a tree structure and qualitative analysis of the fault tree is carried out. The minimum cut set and the minimum diameter set of the fault tree are obtained, and the importance degree of the structure is analyzed. The analysis results lay the foundation for the design of expert system inference engine. 4. The knowledge base of expert system is designed by the method of minimum cut set and production rule of fault tree. The knowledge base of fault fact table, minimum cut set event table, fault rule table, fault condition table and maintenance table is established. The inference engine is established by using the reasoning method based on fault tree knowledge, the direction of reasoning and the search strategy of depth-limited priority. Basically completed the expert system design. 5. On the basis of the above research, the software of reverse osmosis desalination fault diagnosis expert system is developed based on Visual Studio2008 and SQL Server2005. The software can cooperate with the reverse osmosis monitoring system, judge whether there are faults in reverse osmosis work in real time, if any, diagnose the faults automatically, and give some suggestions for maintenance and maintenance. Simulation test and interactive test analysis of simulated data under different operating conditions show that the system has good fault diagnosis effect and application value.
【學(xué)位授予單位】：杭州電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P747.5;TP277

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