本文關(guān)鍵詞： 硫磺回收裝置 酸性水罐 胺液再生裝置 硫冷凝器 液硫儲(chǔ)罐 防腐措施　出處：《東北石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著我國煉化企業(yè)對(duì)原油加工深度和產(chǎn)品質(zhì)量要求的不斷提高與對(duì)環(huán)保要求的日趨嚴(yán)格,則對(duì)污水與廢氣的排放要求越來越嚴(yán)格。一般煉油廠的采用硫磺回收裝置回收煉油過程中產(chǎn)生的廢氣與廢水中的H2S來制備硫磺。而由于硫磺回收裝置的介質(zhì)較復(fù)雜,并且在高溫條件下反應(yīng),故硫磺回收裝置有些部位易腐蝕。硫磺回收裝置腐蝕較嚴(yán)重的部位主要有酸性水罐、胺液再生裝置、硫冷凝器、液硫儲(chǔ)罐等。該論文主要針對(duì)大慶石化煉油廠的易腐蝕的酸性水罐、胺液再生裝置、硫冷凝器、液硫儲(chǔ)罐這四個(gè)關(guān)鍵單元進(jìn)行腐蝕機(jī)理研究與防腐機(jī)理研究。本論文采用模擬這四個(gè)關(guān)鍵單元腐蝕嚴(yán)重部位的腐蝕環(huán)境,利用失重法、極化曲線、阻抗譜進(jìn)行裝置的耐蝕性測(cè)試,并結(jié)合掃描電鏡(SEM)觀察其表面腐蝕形貌,能譜儀(EDS)分析腐蝕產(chǎn)物的化學(xué)元素,XRD分析腐蝕產(chǎn)物的物相組成,最后得出該裝置的腐蝕機(jī)理與防腐機(jī)理。1.酸性水罐的主要材質(zhì)是碳鋼Q235B,測(cè)試介質(zhì):大慶石化煉油廠的酸性水溶液,測(cè)試溫度:25℃;2.胺液再生裝置中,胺液再生塔的主要材質(zhì)為Q245R,測(cè)試介質(zhì):R-NH2—H2—CO2—H2O腐蝕體系,測(cè)試溫度:25℃;富液管道的主要材質(zhì)是20#,測(cè)試介質(zhì):模擬的熱穩(wěn)定鹽體系,測(cè)試溫度:25℃;3.硫冷凝器的主要材質(zhì)是10#,測(cè)試介質(zhì):45%的硫酸,測(cè)試溫度:60℃;4.液硫儲(chǔ)罐的主要材質(zhì)是碳鋼Q235B,測(cè)試介質(zhì):飽和H2S溶液,測(cè)試溫度:70℃。
[Abstract]:With the continuous improvement of crude oil processing depth and product quality requirements in refining and chemical enterprises in China, and the increasingly stringent requirements for environmental protection, In general, sulfur recovery units are used to recover H2S from oil refining process to produce sulfur. However, the medium of sulfur recovery unit is more complex. And under the condition of high temperature, some parts of the sulfur recovery unit are easy to corrode. The most serious corrosion parts of the sulfur recovery unit are acid water tank, amine liquid regeneration unit, sulfur condenser, and so on. This paper is mainly aimed at acid water tank, amine regeneration unit, sulfur condenser and so on, which are easily corroded in Daqing Petrochemical Refinery. The corrosion mechanism and anticorrosion mechanism of the four key units of liquid sulfur storage tank were studied. In this paper, the corrosion environment of the four key units was simulated, and the polarization curve was obtained by using weightlessness method. The corrosion resistance of the device was tested by impedance spectroscopy, and the surface corrosion morphology was observed by means of scanning electron microscope (SEM). The chemical elements of the corrosion products were analyzed by EDS, and the phase composition of the corrosion products was analyzed by XRD. Finally, the corrosion mechanism and anticorrosion mechanism of the unit are obtained. 1. The main material of the acid water tank is carbon steel Q235B, the test medium is the acidic aqueous solution of Daqing Petrochemical Refinery, the test temperature is 25 鈩，

本文編號(hào)：1515408