【正文】 過現(xiàn)場調(diào)查及掛片實驗的分析 主要研究 天然氣加熱爐的腐蝕結(jié)垢原因分析、腐蝕機理及影響 因素、防腐措施、 加熱爐清洗與緩蝕阻垢技術(shù)等內(nèi)容。加熱爐煙道金屬內(nèi)壁則 最易發(fā)生 CO2酸性腐蝕 以及溶解氧引起的氧去極化腐蝕。 對本文的研究做出重要貢獻(xiàn)的個人和集體，均已在文中以明確方式標(biāo)明。 學(xué)生 畢業(yè)設(shè)計（論文） 題 目 天然氣加熱爐的腐蝕研究 作 者 高海菲 院 (系 ) 化學(xué)與化工學(xué)院 專 業(yè) 油氣儲運工程 指導(dǎo)教師 答辯日期 畢業(yè)設(shè)計（論文） 誠信責(zé)任書 本人 鄭重聲明：所呈交的畢業(yè)設(shè)計（論文），是 本人 在導(dǎo)師的指導(dǎo)下獨立進(jìn)行研究所取得的成果。 本人畢業(yè)設(shè)計（論文）與資料若有不實，愿意承擔(dān)一切相關(guān)的法律責(zé)任。 加熱爐的安全使用和熱傳遞效率直接影響天然氣的安全平穩(wěn)生產(chǎn)。 關(guān)鍵詞 ：加熱爐，腐蝕，結(jié)垢， 清洗，鈍化 研究類型： 綜合 研究 ABSTRACT The corrosion of the forms of water sides and the flue of the heating furnace is varied from different parts. The main reason for these phenomena is related to the factors about the heat transfer condition and corrosion of different parts. Furnace corrosion is mainly to oxygen corrosion, corrosive ions corrosion, acid corrosion, corrosion of iron scale, wet and dry line corrosion, alkaline, the main reason for the corrosion oxygen. Metal furnace flue wall is most vulnerable to acid corrosion of carbon dioxide and oxygen to the polarization caused by oxygen corrosion. The safe use of heating and heat transfer efficiency of the heating furnace affects the security of stable natural gas production directly. However, many current furnace gases gathering station did not take any anticorrosion measures. And the gas gathering station furnace corrosion and the reduction of the heat transfer efficiency will cause a serious accident. Therefore, the research of corrosion about the heating furnace is a hot point and trend of the current domestic and international pressure vessel and pipeline .And it has made many achievements and progress in recent years. This paper is mainly a research about the reason for natural gas furnace corrosion and scaling analysis, corrosion mechanism and influencing factors, anticorrosion measures, furnace cleaning and corrosion and scale inhibition technology and so on. Key words: The heating furnace, Corrosion, Scaling, Cleaning, Inactivation Thesis Type ： Comprehensive Study 目錄 I 目錄 摘 要 ........................................................................................................................................I ABSTRACT............................................................................................................................. II 1 緒論 ..................................................................................................................................... 1 課題研究的意義 ................................................................................................................ 1 國內(nèi)外研究現(xiàn)狀及分析 .................................................................................................... 2 2 現(xiàn)場調(diào)查 ................................................................................................................................ 3 加熱爐工作原理 ................................................................................................................ 3 加熱爐使用工況 ................................................................................................................ 3 加熱爐腐蝕狀況 ................................................................................................................ 4 煙道堵塞現(xiàn)象 ................................................................................................................. 4 煙道堵塞導(dǎo)致回火的原因 ............................................................................................. 4 煙氣中產(chǎn)生冷凝水 ......................................................................................................... 5 總結(jié) ................................................................................................................................. 5 3 加熱爐腐蝕及結(jié)垢原因分析 ................................................................................................ 6 水質(zhì)分析 ............................................................................................................................ 6 垢樣分析 ............................................................................................................................ 6 加熱爐產(chǎn)生硬垢的原因 ..................................................................................................... 7 結(jié)垢原因 ............................................................................................................................ 7 4 加熱爐腐蝕機理及影響因素 ................................................................................................ 9 加熱爐水側(cè)不同部位的腐蝕 ............................................................................................. 9 氧腐蝕 ............................................................................................................................. 9 腐蝕性離子的腐蝕 ....................................................................................................... 10 酸腐蝕 ........................................................................................................................... 10 鐵垢腐蝕 ....................................................................................................................... 10 干濕線腐蝕 ................................................................................................................... 11 堿腐蝕 ........................................................................................................................... 11 加熱爐煙道金屬內(nèi)壁的腐蝕 .......................................................................................... 11 二氧化碳引起的氫去極化腐蝕。因此， 防止或減緩腐蝕的 危害， 研究 防腐 技術(shù) 和 提高防腐 管理水平，不僅可延長設(shè)備使用壽命，為企業(yè)取得明顯的經(jīng)濟效益，同時也 可為社會節(jié)約大量的金屬材料，具有重大的社會效益。上述腐蝕如不盡快采取有效的防治措施，會使現(xiàn)有的腐蝕進(jìn)一步加快， 導(dǎo)致 加熱爐的使用壽命大大降低，這樣不但會增加企業(yè)設(shè)備投資成本，而且會影響正常生產(chǎn)，會使生產(chǎn)現(xiàn)場存在不安全因素，存在重大安全隱患。 從而達(dá)到節(jié)能降耗和提高天然氣加熱爐效率的目的。 由此可見 ，本 課題立項與研究具有重要的現(xiàn)實意義和經(jīng)濟價值。但是大量的國內(nèi)外研究資料表明