發(fā)布時(shí)間：2018-05-17 16:28

  本文選題：空冷器系統(tǒng) + 流動(dòng)腐蝕��； 參考：《浙江理工大學(xué)》2015年碩士論文

【摘要】：能源是社會(huì)、經(jīng)濟(jì)發(fā)展的基礎(chǔ)，石油化工是我國能源工業(yè)的重要支撐。然而，隨著我國原油資源的枯竭，中東高硫、高酸、含氯劣質(zhì)原油進(jìn)口量的逐年增加，許多石化企業(yè)的加氫裝置普遍出現(xiàn)流動(dòng)腐蝕失效引發(fā)的設(shè)備管束局部穿孔、爆管甚至爆炸、火災(zāi)等非計(jì)劃停工事故，嚴(yán)重威脅裝置和人身安全。因此，面對(duì)復(fù)雜的石化工藝關(guān)聯(lián)過程，如何實(shí)現(xiàn)流動(dòng)腐蝕預(yù)測和監(jiān)測的科學(xué)管理一直是學(xué)術(shù)界和工程界關(guān)注的焦點(diǎn)。 本文以加氫熱高分空冷器系統(tǒng)的流動(dòng)腐蝕為研究對(duì)象，，開展流動(dòng)腐蝕預(yù)測及狀態(tài)監(jiān)測技術(shù)研究。取得的主要研究成果包括：1）基于工藝關(guān)聯(lián)過程確定流動(dòng)腐蝕回路，采用ASPEN軟件構(gòu)建工藝模型，獲得多相流相態(tài)變化及腐蝕性介質(zhì)分布規(guī)律，明確空冷器的流動(dòng)腐蝕失效機(jī)理為多相流沖蝕；2）結(jié)合傳熱計(jì)算獲得空冷管束內(nèi)流體溫度分布規(guī)律，運(yùn)用CFD數(shù)值模擬獲得的剪切應(yīng)力表征空冷器管束沖蝕失效的危險(xiǎn)區(qū)域，并根據(jù)遠(yuǎn)場渦流檢測結(jié)果驗(yàn)證了沖蝕預(yù)測方法的準(zhǔn)確性；3）基于多相流沖蝕預(yù)測結(jié)果，構(gòu)建基于沖蝕失效模式的空冷器系統(tǒng)防控體系，建立包括流速、NH4HS濃度、H2S分壓、pH值和Cl-含量等流動(dòng)腐蝕防控參數(shù)群的軟測量模型，確定防控參數(shù)的控制指標(biāo)及超標(biāo)后的監(jiān)管措施；4）以流動(dòng)腐蝕防控體系為基礎(chǔ)，基于C/S模式開發(fā)空冷器系統(tǒng)流動(dòng)腐蝕監(jiān)管平臺(tái)，實(shí)現(xiàn)DCS系統(tǒng)、LIMS系統(tǒng)的遠(yuǎn)程基礎(chǔ)工況數(shù)據(jù)的實(shí)時(shí)采集；通過自動(dòng)控制服務(wù)器實(shí)現(xiàn)應(yīng)用程序與ASPEN模型交互，計(jì)算腐蝕防控參數(shù)實(shí)時(shí)值，并與控制指標(biāo)對(duì)比評(píng)價(jià)空冷器系統(tǒng)腐蝕狀態(tài)，對(duì)超標(biāo)參數(shù)進(jìn)行聲光報(bào)警并給出處理措施�，F(xiàn)場應(yīng)用結(jié)果表明，開發(fā)的監(jiān)測管理平臺(tái)可實(shí)現(xiàn)流動(dòng)腐蝕狀態(tài)在線實(shí)時(shí)監(jiān)管，降低空冷器系統(tǒng)流動(dòng)腐蝕風(fēng)險(xiǎn)，提高設(shè)備系統(tǒng)的優(yōu)化運(yùn)行水平，保障裝置安全、穩(wěn)定、長周期運(yùn)行。 本文創(chuàng)新性包括：1）基于工藝仿真、傳熱計(jì)算及流動(dòng)數(shù)值模擬構(gòu)建流動(dòng)腐蝕失效預(yù)測模型，明確空冷器系統(tǒng)的多相流沖蝕機(jī)理及危險(xiǎn)區(qū)域；2）基于流動(dòng)腐蝕預(yù)測，確定空冷器系統(tǒng)流動(dòng)腐蝕防控參數(shù)群，并通過數(shù)理建模實(shí)現(xiàn)腐蝕防控參數(shù)的軟測量；3）利用.NET Remoting技術(shù)開發(fā)基于C/S模式的流動(dòng)腐蝕狀態(tài)監(jiān)測管理平臺(tái)，通過生產(chǎn)過程數(shù)據(jù)監(jiān)測與管理信息系統(tǒng)交互，實(shí)現(xiàn)空冷器系統(tǒng)流動(dòng)腐蝕狀態(tài)在線實(shí)時(shí)監(jiān)測管理。
[Abstract]:Energy is the foundation of social and economic development, petrochemical industry is an important support of energy industry in China. However, with the depletion of crude oil resources in China and the increasing import of crude oil with high sulfur, high acid and chlorine content in the Middle East, a local perforation of the equipment bundle caused by the failure of flow corrosion occurs in many hydrogenation plants in petrochemical enterprises. Pipe-burst, even explosion, fire and other unplanned stoppage accidents, a serious threat to device and personal safety. Therefore, in the face of complex petrochemical process correlation process, how to realize the scientific management of flow corrosion prediction and monitoring has always been the focus of academic and engineering circles. In this paper, the flow corrosion prediction and condition monitoring technology of the hydrothermal high score air cooler system are studied. The main research results obtained include: (1) the flow corrosion loop is determined based on the process correlation process, the process model is constructed by using ASPEN software, and the phase change and corrosive medium distribution law of multiphase flow are obtained. It is clear that the failure mechanism of flow corrosion of air cooler is multiphase flow erosion) combined with heat transfer calculation, the fluid temperature distribution in air cooled tube bundle is obtained. The shear stress obtained by CFD numerical simulation is used to characterize the dangerous zone of erosion failure of air cooler tube bundle. According to the results of far field eddy current testing, the accuracy of the erosion prediction method is verified. Based on the erosion prediction results of multiphase flow, the air cooler system control system based on erosion failure mode is constructed. A soft sensor model of flow corrosion control parameter group including flow rate NH 4HS concentration, H 2S partial pressure, pH value and Cl- content is established, and the control index of the control parameters and the supervision measures after exceeding the standard are determined) based on the flow corrosion prevention and control system. Based on C / S mode, the air cooler system flow corrosion monitoring platform is developed to realize the real-time data acquisition of the remote basic working condition of DCS system, and to realize the interaction between the application program and the ASPEN model through the automatic control server. The real-time value of corrosion prevention and control parameters is calculated and compared with the control index to evaluate the corrosion status of air cooler system. The acousto-optic alarm for the parameters exceeding the standard is given and the treatment measures are given. Field application results show that the developed monitoring and management platform can realize on-line real-time supervision of flow corrosion status, reduce the risk of flow corrosion in air cooler system, improve the optimal operation level of the equipment system, and ensure the safety and stability of the device. Long period operation. The innovations of this paper include: (1) based on process simulation, heat transfer calculation and flow numerical simulation, the failure prediction model of flow corrosion is constructed, and the mechanism of multiphase flow erosion of air cooler system and danger zone are clarified. Determine the flow corrosion prevention and control parameter group of air cooler system, and realize the soft sensing of corrosion prevention and control parameter by mathematical modeling. Using. Net Remoting technology to develop flow corrosion monitoring and management platform based on C / S mode. Through the interaction between production process data monitoring and management information system, on-line real-time monitoring and management of flow corrosion status of air cooler system is realized.
【學(xué)位授予單位】：浙江理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE986

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本文編號(hào)：1902056