大連天凡防腐工程有限公司在四川某石化公司對(duì)乙烯裝置化學(xué)清洗論文發(fā)表在SEI雜志

                   大型煉化企業(yè)乙烯裝置急冷油塔化學(xué)清洗的實(shí)踐及效果

Practice and effect of chemical cleaning of quench oil tower of ethylene plant in large refining and chemical enterprises

鄒競(jìng)逸   劉裔

  （ 遼寧 大連 116001 ）

摘要：四川某石化公司80萬(wàn)噸/年乙烯裝置歷經(jīng)第二個(gè)停工檢修，工作重點(diǎn)內(nèi)容是采取化學(xué)清洗手段除去急冷油塔系統(tǒng)中硫化氫、硫化亞鐵、重油組分、糠醛聚合物、殘存丁二烯聚合物，堿洗塔、廢堿收集罐、廢液槽中廢堿黃油、碳焦粉、鐵銹等結(jié)垢沉積垢，清洗后使設(shè)備達(dá)到進(jìn)人檢修/生產(chǎn)條件，達(dá)到表面清潔，防止硫化亞鐵自燃、消除異味、恢復(fù)設(shè)備的使用功能。乙烯裝置清洗在國(guó)內(nèi)煉化行業(yè)處于起步和經(jīng)驗(yàn)積累階段，按照業(yè)主的環(huán)保以及其他技術(shù)要求，有針對(duì)性的引入螯合和絡(luò)合化學(xué)清洗理念和工藝，通過(guò)實(shí)踐達(dá)到了業(yè)主的各項(xiàng)要求。

Abstract: The 800,000 tons/year ethylene plant of a petrochemical company in Sichuan has undergone the second shutdown maintenance. The focus of the work is to take chemical cleaning methods to remove hydrogen sulfide, ferrous sulfide, heavy oil components, furfural polymer, residual butadiene polymer, alkali washing tower, waste alkali collection tank, waste alkali butter, carbon coke powder, rust and other scale deposits in the quench oil tower system. After cleaning, the equipment can reach the maintenance/production conditions, achieve surface cleaning, prevent the spontaneous combustion of ferrous sulfide, eliminate odor, and restore the use of the equipment. Ethylene plant cleaning Domestic refining and chemical industry is in the beginning and experience accumulation stage, in accordance with the owner's environmental protection and other technical requirements, targeted at the introduction of chelating and complex chemical cleaning concept and process, through practice, to meet the requirements of the owner.

關(guān)鍵詞：乙烯；急冷油塔；堿洗塔；硫化亞鐵鈍化；鈍化；焦炭粉等聚合物垢。

Key words: ethylene; Quench oil tower; Alkali washing tower; Ferrous sulfide passivation; Passivation; Coke powder and other polymer scale.

四川某石化公司是位于中國(guó)西南地區(qū)的千萬(wàn)級(jí)大型現(xiàn)代化煉化企業(yè)，地處四川成都彭州市，處四川盆地西北部，成都平原西北邊緣與龍門山過(guò)渡地帶，山、丘、壩俱全，地形凹陷，號(hào)稱成都的后花園、四川省的菜籃子，對(duì)環(huán)保要求難度很大，一旦有污染氣體、污水等排放排溢，難以自潔自稀釋自清。因此，四川某石化公司在2023年9月份檢修期間提出裝置安全、綠色、環(huán)保為宗旨的檢修指導(dǎo)性綱領(lǐng)要求。

乙烯裝置急冷油塔、堿洗塔、廢堿系統(tǒng)設(shè)備及管道內(nèi)部殘留有重油組分、糠醛類聚合物、丁二烯聚合物、碳焦粉、硫化物等物質(zhì)沉積在換熱器、塔盤、塔內(nèi)件及設(shè)備與管路死角上，廢堿系統(tǒng)殘留還有黃油等聚合物沉積垢。設(shè)備內(nèi)的硫化亞鐵遇氧極易發(fā)生自燃，會(huì)產(chǎn)生大量的惡臭氣體，給設(shè)備和檢修人員的安全造成很大威脅。類似的事故也常有發(fā)生，給企業(yè)帶來(lái)了巨大損失，廢堿系統(tǒng)殘留黃油等聚合物垢、鐵氧化合物垢也會(huì)給裝置運(yùn)行帶來(lái)不利影響。

為了解決這些問(wèn)題，采取水基清洗除掉殘留硫化物的方法，達(dá)到防止硫化亞鐵自燃、消除異味、清除廢堿殘留和聚合物垢沉積的效果。同時(shí)，保證人員設(shè)備安全及檢修工作順利進(jìn)行，對(duì)企業(yè)效益實(shí)現(xiàn)最大化有著極其重要的意義。