本文選題：催化裂化 + 煙氣輪機(jī)　； 參考：《華東理工大學(xué)》2015年碩士論文

【摘要】：針對(duì)近年來(lái)煉廠中出現(xiàn)催化裂化煙氣輪機(jī)內(nèi)結(jié)垢嚴(yán)重的問(wèn)題展開(kāi)了研究。首先采用SEM、EDS和ICP-AES等測(cè)試方法分析了垢樣的物性,得出垢樣主要是由催化劑顆粒組成,此催化劑為硅鋁酸鹽催化劑,其中含有Na、S、Si、Fe等金屬元素及La、Se等稀土元素,并以其為活性組分,并分析了這些金屬元素對(duì)結(jié)垢的影響；高溫?zé)煔鈳霟煓C(jī)的顆粒粒徑均勻分布于1-10μm之間,然而在煙機(jī)內(nèi)部運(yùn)動(dòng)的過(guò)程中,其中只有粒徑在1-2μm之間的催化劑顆粒能被動(dòng)葉表面吸附,并沉積在其表面形成垢。同時(shí)從催化劑顆粒在煙機(jī)內(nèi)部表面,尤其是動(dòng)葉表面沉積時(shí)的受力情況出發(fā),研究了煙機(jī)結(jié)垢的機(jī)理。還通過(guò)CFD對(duì)煙機(jī)內(nèi)部流場(chǎng)進(jìn)行模擬,得出葉片根部壓力面周?chē)鸁煔獾南鄬?duì)速度最低；催化劑濃度隨著葉高的降低逐漸升高,在動(dòng)葉葉根處顆粒濃度急劇升高,催化劑導(dǎo)致催化劑顆粒在動(dòng)葉葉根處集聚,造成在動(dòng)葉葉根處更易結(jié)垢,與現(xiàn)場(chǎng)檢測(cè)結(jié)果相吻合。最后根據(jù)這些影響因素提出了一些防護(hù)措施與改進(jìn)方案,以達(dá)到抑制或者減輕煙氣輪機(jī)結(jié)垢的目的。
[Abstract]:The problem of serious scaling in FCC flue gas turbine in recent years was studied. Firstly, the physical properties of scale samples were analyzed by means of SEMMA-EDS and ICP-AES. The results showed that the scale samples were mainly composed of catalyst particles. The catalyst consisted of aluminosilicate catalyst, which contained metal elements such as NaOH, Si-Fe and La-Se, and used them as active components. The influence of these metal elements on the scaling is analyzed. The particle size of the high temperature smoke brought into the cigarette machine is between 1-10 渭 m, however, in the process of the internal movement of the smoke machine, the particle size of the particle is between 1 渭 m and 10 渭 m. Only catalyst particles with a particle size of 1-2 渭 m can be adsorbed on the passive leaf surface and deposited on the surface of the catalyst to form scale. At the same time, the mechanism of fouling was studied based on the stress of catalyst particles deposited on the inner surface of tobacco machine, especially on the surface of moving blade. The relative velocity of the flue gas around the pressure surface of the blade root was the lowest, and the concentration of catalyst increased gradually with the decrease of the leaf height, and the particle concentration increased sharply at the root of the moving leaf. The catalyst leads to the agglomeration of catalyst particles at the root of the moving leaf, which makes it easier to scale at the root of the leaf, which is consistent with the field test results. Finally, according to these influencing factors, some protective measures and improvement schemes are put forward in order to restrain or reduce the fouling of flue gas turbine.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE96

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本文編號(hào)：1994975