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治理現(xiàn)狀</span></p></div> </div> </div>   <div id="q62g0qo" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">儲罐逸散VOCs 治理現(xiàn)狀</h1> <div id="q62g0qo" class="NyNewsdetail_tips">更新日期：2022-05-24 點擊次數(shù)：1564</div> <div id="q62g0qo" class="NyNewsdetail_con"> <p><span>在罐區(qū)VOCs治理中，我們經(jīng)常要面臨VOCs治理系統(tǒng)需將多個儲罐連通進行油氣回收，其實罐區(qū)VOCs 治理工程實施后，儲罐氣相空間通過油氣支管連接相通成為一個整體空間，相連儲罐的風(fēng)險增大。各儲罐在原有風(fēng)險如儲罐發(fā)生抽癟、超壓、火災(zāi)爆炸等事故的基礎(chǔ)上，存在若某個儲罐發(fā)生火災(zāi)，火焰會通過相連的管道傳播到鄰近的儲罐或設(shè)施，發(fā)生重大群罐火災(zāi)甚至爆炸的風(fēng)險。因此，原國家安全生產(chǎn)監(jiān)督管理總局要求，實施油氣治理氣相連通工程必須經(jīng)過安全專項評估，以防止重大事故的發(fā)生。</span></p><p><span></span></p><p style="text-align: center"><img src="https://img62.hbzhan.com/9/20220524/637890100201516261226.png" style="max-width:800px;max-height:300%;" title="微信圖片_20220524172439.png"/></p><p><br/></p><p><span>目前儲罐罐頂油氣VOCs 治理氣相連通系統(tǒng)主要采用氣相平衡管、單罐單控(控制儲罐排氣并實現(xiàn)事故下切斷)、單呼閥方案和直接連通切斷閥方案(多個儲罐氣相連通后共用一個氣動開關(guān)閥控制該連通罐組向總管排氣)等連通方式，存在將火災(zāi)危險性不同的儲罐、高含硫與低含硫儲罐、高溫物料與常溫物料儲罐、內(nèi)浮頂與拱頂儲罐、設(shè)置氮封與未設(shè)氮封儲罐進行直接連通的現(xiàn)象，儲罐物料特性、油氣濃度、氣相空間氧含量等不同都會增加氣相連通罐組的危險性。</span></p><p><span></span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img62.hbzhan.com/9/20220524/637890100200892253648.png" alt="637890100200892253648.png"/></p><p><span></span><br/></p><p><span>連通數(shù)量越多，發(fā)生火災(zāi)爆炸的可能性越大，特別是我國石化儲運罐區(qū)的氮封設(shè)計量大多未考慮異常溫降的影響，存在空氣進入的條件，儲罐氣相空間為爆炸氣體1 區(qū)，甚至0 區(qū)。儲罐老化現(xiàn)象嚴(yán)重，浮盤密封性能下降,再加上高含硫等特點，直接連通數(shù)量過多將導(dǎo)致群罐火災(zāi)事故升級，安全風(fēng)險增大。VOCs 處理設(shè)施主要包括如油氣回收系統(tǒng)(吸附、冷凝等)、TO/ CEB 等明火燃燒技術(shù)、RTO/ CO/ RCO 等低溫燃燒技術(shù)、等離子體、生物法系統(tǒng)等和協(xié)同處理設(shè)施如生產(chǎn)設(shè)施(既有硫磺反應(yīng)爐及焚燒爐、鍋爐、加熱爐、催化裂化裝置再生器等)、全廠性低壓瓦斯系統(tǒng)等。</span></p><p><span><br/></span></p><p><span>罐區(qū)VOCs 氣體普遍存在氣量及濃度波動大、間歇排放等問題。國外在進行VOCs 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