| 由氮氧化物导致的乙烯装置冷箱低压甲烷侧冻堵分析 |
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| 引用本文： | 戴立起.由氮氧化物导致的乙烯装置冷箱低压甲烷侧冻堵分析[J].乙烯工业,2021(1). |
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| 作者姓名： | 戴立起 |
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| 作者单位： | 中沙（天津）石化有限公司 |
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| 摘 要： | 针对中沙乙烯冷箱系统低压甲烷侧冻堵情况,基于乙烯装置因氮氧化物(NOx)导致冷箱冻堵,检测了在不同复热时期不同取样点的NOx、形态氮、总氮以及裂解原料中氮和氧含量。分析认为,冷箱中NOx的形成原因为进入深冷系统的裂解气从裂解单元带入NO,在冷箱中与O2反应,原料中的氮化物形成了NOx。
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| 关 键 词： | 冷箱系统 低压甲烷 氮氧化物 冻堵 |
ANALYSIS ON FREEZE BLOCKAGE IN LOW-PRESSURE METHANE SIDE OF COLD BOX IN ETHYLENE PLANT CAUSED BY NOx |
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| Dai Liqi.ANALYSIS ON FREEZE BLOCKAGE IN LOW-PRESSURE METHANE SIDE OF COLD BOX IN ETHYLENE PLANT CAUSED BY NOx[J].Ethylene Industry,2021(1). |
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| Authors: | Dai Liqi |
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| Affiliation: | (SINOPEC SABIC Tianjin Petrochemical Company Limited,Tianjin Binhai New Area,P.C.300271) |
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| Abstract: | Based on the freeze blockage situation in the low-pressure methane side of cold box in an ethylene plant as well as the reaction mechanism of freeze blockage in cold box caused by NOx,the test data of NOx,nitrogen compounds and total-N at different sampling positions in each recuperative stage of cracking process are introduced.The root cause of NOxformation in cold box is that the NO introduced from cracking unit reacts with the O2in cold box,and NOxis formed from the nitrogen compounds in raw material. |
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| Keywords: | cold box system low-pressure methane NOx freeze blockage |
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